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-rw-r--r--drivers/misc/mei/Kconfig9
-rw-r--r--drivers/misc/mei/Makefile6
-rw-r--r--drivers/misc/mei/amthif.c122
-rw-r--r--drivers/misc/mei/bus.c32
-rw-r--r--drivers/misc/mei/client.c527
-rw-r--r--drivers/misc/mei/client.h41
-rw-r--r--drivers/misc/mei/debugfs.c58
-rw-r--r--drivers/misc/mei/hbm.c600
-rw-r--r--drivers/misc/mei/hbm.h10
-rw-r--r--drivers/misc/mei/hw-me-regs.h20
-rw-r--r--drivers/misc/mei/hw-me.c384
-rw-r--r--drivers/misc/mei/hw-me.h16
-rw-r--r--drivers/misc/mei/hw-txe-regs.h294
-rw-r--r--drivers/misc/mei/hw-txe.c1190
-rw-r--r--drivers/misc/mei/hw-txe.h77
-rw-r--r--drivers/misc/mei/hw.h48
-rw-r--r--drivers/misc/mei/init.c339
-rw-r--r--drivers/misc/mei/interrupt.c319
-rw-r--r--drivers/misc/mei/main.c99
-rw-r--r--drivers/misc/mei/mei_dev.h195
-rw-r--r--drivers/misc/mei/nfc.c38
-rw-r--r--drivers/misc/mei/pci-me.c283
-rw-r--r--drivers/misc/mei/pci-txe.c436
-rw-r--r--drivers/misc/mei/wd.c147
24 files changed, 4247 insertions, 1043 deletions
diff --git a/drivers/misc/mei/Kconfig b/drivers/misc/mei/Kconfig
index c76fa31e9bf..d23384dde73 100644
--- a/drivers/misc/mei/Kconfig
+++ b/drivers/misc/mei/Kconfig
@@ -34,3 +34,12 @@ config INTEL_MEI_ME
82Q33 Express
82X38/X48 Express
+config INTEL_MEI_TXE
+ tristate "Intel Trusted Execution Environment with ME Interface"
+ select INTEL_MEI
+ depends on X86 && PCI && WATCHDOG_CORE
+ help
+ MEI Support for Trusted Execution Environment device on Intel SoCs
+
+ Supported SoCs:
+ Intel Bay Trail
diff --git a/drivers/misc/mei/Makefile b/drivers/misc/mei/Makefile
index 08698a46626..8ebc6cda137 100644
--- a/drivers/misc/mei/Makefile
+++ b/drivers/misc/mei/Makefile
@@ -1,6 +1,6 @@
#
# Makefile - Intel Management Engine Interface (Intel MEI) Linux driver
-# Copyright (c) 2010-2011, Intel Corporation.
+# Copyright (c) 2010-2014, Intel Corporation.
#
obj-$(CONFIG_INTEL_MEI) += mei.o
mei-objs := init.o
@@ -17,3 +17,7 @@ mei-$(CONFIG_DEBUG_FS) += debugfs.o
obj-$(CONFIG_INTEL_MEI_ME) += mei-me.o
mei-me-objs := pci-me.o
mei-me-objs += hw-me.o
+
+obj-$(CONFIG_INTEL_MEI_TXE) += mei-txe.o
+mei-txe-objs := pci-txe.o
+mei-txe-objs += hw-txe.o
diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c
index d0fdc134068..0d6234db00f 100644
--- a/drivers/misc/mei/amthif.c
+++ b/drivers/misc/mei/amthif.c
@@ -21,7 +21,6 @@
#include <linux/fcntl.h>
#include <linux/aio.h>
#include <linux/pci.h>
-#include <linux/init.h>
#include <linux/ioctl.h>
#include <linux/cdev.h>
#include <linux/list.h>
@@ -35,7 +34,6 @@
#include "mei_dev.h"
#include "hbm.h"
-#include "hw-me.h"
#include "client.h"
const uuid_le mei_amthif_guid = UUID_LE(0x12f80028, 0xb4b7, 0x4b2d,
@@ -57,6 +55,8 @@ void mei_amthif_reset_params(struct mei_device *dev)
dev->iamthif_ioctl = false;
dev->iamthif_state = MEI_IAMTHIF_IDLE;
dev->iamthif_timer = 0;
+ dev->iamthif_stall_timer = 0;
+ dev->iamthif_open_count = 0;
}
/**
@@ -77,8 +77,9 @@ int mei_amthif_host_init(struct mei_device *dev)
i = mei_me_cl_by_uuid(dev, &mei_amthif_guid);
if (i < 0) {
- dev_info(&dev->pdev->dev, "amthif: failed to find the client\n");
- return -ENOENT;
+ dev_info(&dev->pdev->dev,
+ "amthif: failed to find the client %d\n", i);
+ return -ENOTTY;
}
cl->me_client_id = dev->me_clients[i].client_id;
@@ -105,20 +106,16 @@ int mei_amthif_host_init(struct mei_device *dev)
ret = mei_cl_link(cl, MEI_IAMTHIF_HOST_CLIENT_ID);
if (ret < 0) {
- dev_err(&dev->pdev->dev, "amthif: failed link client\n");
- return -ENOENT;
+ dev_err(&dev->pdev->dev,
+ "amthif: failed link client %d\n", ret);
+ return ret;
}
- cl->state = MEI_FILE_CONNECTING;
+ ret = mei_cl_connect(cl, NULL);
- if (mei_hbm_cl_connect_req(dev, cl)) {
- dev_dbg(&dev->pdev->dev, "amthif: Failed to connect to ME client\n");
- cl->state = MEI_FILE_DISCONNECTED;
- cl->host_client_id = 0;
- } else {
- cl->timer_count = MEI_CONNECT_TIMEOUT;
- }
- return 0;
+ dev->iamthif_state = MEI_IAMTHIF_IDLE;
+
+ return ret;
}
/**
@@ -132,14 +129,12 @@ int mei_amthif_host_init(struct mei_device *dev)
struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev,
struct file *file)
{
- struct mei_cl_cb *pos = NULL;
- struct mei_cl_cb *next = NULL;
+ struct mei_cl_cb *cb;
- list_for_each_entry_safe(pos, next,
- &dev->amthif_rd_complete_list.list, list) {
- if (pos->cl && pos->cl == &dev->iamthif_cl &&
- pos->file_object == file)
- return pos;
+ list_for_each_entry(cb, &dev->amthif_rd_complete_list.list, list) {
+ if (cb->cl && cb->cl == &dev->iamthif_cl &&
+ cb->file_object == file)
+ return cb;
}
return NULL;
}
@@ -172,17 +167,16 @@ int mei_amthif_read(struct mei_device *dev, struct file *file,
unsigned long timeout;
int i;
- /* Only Posible if we are in timeout */
+ /* Only possible if we are in timeout */
if (!cl || cl != &dev->iamthif_cl) {
dev_dbg(&dev->pdev->dev, "bad file ext.\n");
- return -ETIMEDOUT;
+ return -ETIME;
}
i = mei_me_cl_by_id(dev, dev->iamthif_cl.me_client_id);
-
if (i < 0) {
dev_dbg(&dev->pdev->dev, "amthif client not found.\n");
- return -ENODEV;
+ return -ENOTTY;
}
dev_dbg(&dev->pdev->dev, "checking amthif data\n");
cb = mei_amthif_find_read_list_entry(dev, file);
@@ -223,7 +217,7 @@ int mei_amthif_read(struct mei_device *dev, struct file *file,
dev_dbg(&dev->pdev->dev, "amthif Time out\n");
/* 15 sec for the message has expired */
list_del(&cb->list);
- rets = -ETIMEDOUT;
+ rets = -ETIME;
goto free;
}
}
@@ -244,13 +238,14 @@ int mei_amthif_read(struct mei_device *dev, struct file *file,
cb->response_buffer.size);
dev_dbg(&dev->pdev->dev, "amthif cb->buf_idx - %lu\n", cb->buf_idx);
- /* length is being turncated to PAGE_SIZE, however,
+ /* length is being truncated to PAGE_SIZE, however,
* the buf_idx may point beyond */
length = min_t(size_t, length, (cb->buf_idx - *offset));
- if (copy_to_user(ubuf, cb->response_buffer.data + *offset, length))
+ if (copy_to_user(ubuf, cb->response_buffer.data + *offset, length)) {
+ dev_dbg(&dev->pdev->dev, "failed to copy data to userland\n");
rets = -EFAULT;
- else {
+ } else {
rets = length;
if ((*offset + length) < cb->buf_idx) {
*offset += length;
@@ -297,9 +292,8 @@ static int mei_amthif_send_cmd(struct mei_device *dev, struct mei_cl_cb *cb)
if (ret < 0)
return ret;
- if (ret && dev->hbuf_is_ready) {
+ if (ret && mei_hbuf_acquire(dev)) {
ret = 0;
- dev->hbuf_is_ready = false;
if (cb->request_buffer.size > mei_hbuf_max_len(dev)) {
mei_hdr.length = mei_hbuf_max_len(dev);
mei_hdr.msg_complete = 0;
@@ -311,14 +305,15 @@ static int mei_amthif_send_cmd(struct mei_device *dev, struct mei_cl_cb *cb)
mei_hdr.host_addr = dev->iamthif_cl.host_client_id;
mei_hdr.me_addr = dev->iamthif_cl.me_client_id;
mei_hdr.reserved = 0;
+ mei_hdr.internal = 0;
dev->iamthif_msg_buf_index += mei_hdr.length;
- if (mei_write_message(dev, &mei_hdr,
- (unsigned char *)dev->iamthif_msg_buf))
- return -ENODEV;
+ ret = mei_write_message(dev, &mei_hdr, dev->iamthif_msg_buf);
+ if (ret)
+ return ret;
if (mei_hdr.msg_complete) {
if (mei_cl_flow_ctrl_reduce(&dev->iamthif_cl))
- return -ENODEV;
+ return -EIO;
dev->iamthif_flow_control_pending = true;
dev->iamthif_state = MEI_IAMTHIF_FLOW_CONTROL;
dev_dbg(&dev->pdev->dev, "add amthif cb to write waiting list\n");
@@ -330,10 +325,6 @@ static int mei_amthif_send_cmd(struct mei_device *dev, struct mei_cl_cb *cb)
list_add_tail(&cb->list, &dev->write_list.list);
}
} else {
- if (!dev->hbuf_is_ready)
- dev_dbg(&dev->pdev->dev, "host buffer is not empty");
-
- dev_dbg(&dev->pdev->dev, "No flow control credentials, so add iamthif cb to write list.\n");
list_add_tail(&cb->list, &dev->write_list.list);
}
return 0;
@@ -359,7 +350,7 @@ int mei_amthif_write(struct mei_device *dev, struct mei_cl_cb *cb)
if (ret)
return ret;
- cb->fop_type = MEI_FOP_IOCTL;
+ cb->fop_type = MEI_FOP_WRITE;
if (!list_empty(&dev->amthif_cmd_list.list) ||
dev->iamthif_state != MEI_IAMTHIF_IDLE) {
@@ -441,35 +432,48 @@ unsigned int mei_amthif_poll(struct mei_device *dev,
/**
- * mei_amthif_irq_write_completed - processes completed iamthif operation.
+ * mei_amthif_irq_write - write iamthif command in irq thread context.
*
* @dev: the device structure.
- * @slots: free slots.
* @cb_pos: callback block.
* @cl: private data of the file object.
* @cmpl_list: complete list.
*
* returns 0, OK; otherwise, error.
*/
-int mei_amthif_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb,
- s32 *slots, struct mei_cl_cb *cmpl_list)
+int mei_amthif_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
+ struct mei_cl_cb *cmpl_list)
{
struct mei_device *dev = cl->dev;
struct mei_msg_hdr mei_hdr;
size_t len = dev->iamthif_msg_buf_size - dev->iamthif_msg_buf_index;
u32 msg_slots = mei_data2slots(len);
+ int slots;
+ int rets;
+
+ rets = mei_cl_flow_ctrl_creds(cl);
+ if (rets < 0)
+ return rets;
+
+ if (rets == 0) {
+ cl_dbg(dev, cl, "No flow control credentials: not sending.\n");
+ return 0;
+ }
mei_hdr.host_addr = cl->host_client_id;
mei_hdr.me_addr = cl->me_client_id;
mei_hdr.reserved = 0;
+ mei_hdr.internal = 0;
- if (*slots >= msg_slots) {
+ slots = mei_hbuf_empty_slots(dev);
+
+ if (slots >= msg_slots) {
mei_hdr.length = len;
mei_hdr.msg_complete = 1;
/* Split the message only if we can write the whole host buffer */
- } else if (*slots == dev->hbuf_depth) {
- msg_slots = *slots;
- len = (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr);
+ } else if (slots == dev->hbuf_depth) {
+ msg_slots = slots;
+ len = (slots * sizeof(u32)) - sizeof(struct mei_msg_hdr);
mei_hdr.length = len;
mei_hdr.msg_complete = 0;
} else {
@@ -479,17 +483,17 @@ int mei_amthif_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb,
dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(&mei_hdr));
- *slots -= msg_slots;
- if (mei_write_message(dev, &mei_hdr,
- dev->iamthif_msg_buf + dev->iamthif_msg_buf_index)) {
- dev->iamthif_state = MEI_IAMTHIF_IDLE;
- cl->status = -ENODEV;
- list_del(&cb->list);
- return -ENODEV;
+ rets = mei_write_message(dev, &mei_hdr,
+ dev->iamthif_msg_buf + dev->iamthif_msg_buf_index);
+ if (rets) {
+ dev->iamthif_state = MEI_IAMTHIF_IDLE;
+ cl->status = rets;
+ list_del(&cb->list);
+ return rets;
}
if (mei_cl_flow_ctrl_reduce(cl))
- return -ENODEV;
+ return -EIO;
dev->iamthif_msg_buf_index += mei_hdr.length;
cl->status = 0;
@@ -719,8 +723,8 @@ static bool mei_clear_lists(struct mei_device *dev, struct file *file)
*/
int mei_amthif_release(struct mei_device *dev, struct file *file)
{
- if (dev->open_handle_count > 0)
- dev->open_handle_count--;
+ if (dev->iamthif_open_count > 0)
+ dev->iamthif_open_count--;
if (dev->iamthif_file_object == file &&
dev->iamthif_state != MEI_IAMTHIF_IDLE) {
diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c
index 6d0282c08a0..0e993ef28b9 100644
--- a/drivers/misc/mei/bus.c
+++ b/drivers/misc/mei/bus.c
@@ -26,7 +26,6 @@
#include <linux/mei_cl_bus.h>
#include "mei_dev.h"
-#include "hw-me.h"
#include "client.h"
#define to_mei_cl_driver(d) container_of(d, struct mei_cl_driver, driver)
@@ -145,9 +144,9 @@ static struct device_type mei_cl_device_type = {
static struct mei_cl *mei_bus_find_mei_cl_by_uuid(struct mei_device *dev,
uuid_le uuid)
{
- struct mei_cl *cl, *next;
+ struct mei_cl *cl;
- list_for_each_entry_safe(cl, next, &dev->device_list, device_link) {
+ list_for_each_entry(cl, &dev->device_list, device_link) {
if (!uuid_le_cmp(uuid, cl->device_uuid))
return cl;
}
@@ -245,10 +244,10 @@ static int ___mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
/* Check if we have an ME client device */
id = mei_me_cl_by_id(dev, cl->me_client_id);
if (id < 0)
- return -ENODEV;
+ return id;
if (length > dev->me_clients[id].props.max_msg_length)
- return -EINVAL;
+ return -EFBIG;
cb = mei_io_cb_init(cl, NULL);
if (!cb)
@@ -297,10 +296,13 @@ int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length)
if (cl->reading_state != MEI_READ_COMPLETE &&
!waitqueue_active(&cl->rx_wait)) {
+
mutex_unlock(&dev->device_lock);
if (wait_event_interruptible(cl->rx_wait,
- (MEI_READ_COMPLETE == cl->reading_state))) {
+ cl->reading_state == MEI_READ_COMPLETE ||
+ mei_cl_is_transitioning(cl))) {
+
if (signal_pending(current))
return -EINTR;
return -ERESTARTSYS;
@@ -425,8 +427,6 @@ int mei_cl_enable_device(struct mei_cl_device *device)
mutex_lock(&dev->device_lock);
- cl->state = MEI_FILE_CONNECTING;
-
err = mei_cl_connect(cl, NULL);
if (err < 0) {
mutex_unlock(&dev->device_lock);
@@ -521,6 +521,22 @@ void mei_cl_bus_rx_event(struct mei_cl *cl)
schedule_work(&device->event_work);
}
+void mei_cl_bus_remove_devices(struct mei_device *dev)
+{
+ struct mei_cl *cl, *next;
+
+ mutex_lock(&dev->device_lock);
+ list_for_each_entry_safe(cl, next, &dev->device_list, device_link) {
+ if (cl->device)
+ mei_cl_remove_device(cl->device);
+
+ list_del(&cl->device_link);
+ mei_cl_unlink(cl);
+ kfree(cl);
+ }
+ mutex_unlock(&dev->device_lock);
+}
+
int __init mei_cl_bus_init(void)
{
return bus_register(&mei_cl_bus_type);
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index e0684b4d9a0..59d20c599b1 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -18,6 +18,7 @@
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/delay.h>
+#include <linux/pm_runtime.h>
#include <linux/mei.h>
@@ -29,20 +30,21 @@
* mei_me_cl_by_uuid - locate index of me client
*
* @dev: mei device
+ *
+ * Locking: called under "dev->device_lock" lock
+ *
* returns me client index or -ENOENT if not found
*/
int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *uuid)
{
- int i, res = -ENOENT;
+ int i;
for (i = 0; i < dev->me_clients_num; ++i)
if (uuid_le_cmp(*uuid,
- dev->me_clients[i].props.protocol_name) == 0) {
- res = i;
- break;
- }
+ dev->me_clients[i].props.protocol_name) == 0)
+ return i;
- return res;
+ return -ENOENT;
}
@@ -60,37 +62,79 @@ int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *uuid)
int mei_me_cl_by_id(struct mei_device *dev, u8 client_id)
{
int i;
+
for (i = 0; i < dev->me_clients_num; i++)
if (dev->me_clients[i].client_id == client_id)
- break;
- if (WARN_ON(dev->me_clients[i].client_id != client_id))
- return -ENOENT;
-
- if (i == dev->me_clients_num)
- return -ENOENT;
+ return i;
- return i;
+ return -ENOENT;
}
/**
- * mei_io_list_flush - removes list entry belonging to cl.
+ * mei_cl_cmp_id - tells if the clients are the same
*
- * @list: An instance of our list structure
- * @cl: host client
+ * @cl1: host client 1
+ * @cl2: host client 2
+ *
+ * returns true - if the clients has same host and me ids
+ * false - otherwise
*/
-void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl)
+static inline bool mei_cl_cmp_id(const struct mei_cl *cl1,
+ const struct mei_cl *cl2)
+{
+ return cl1 && cl2 &&
+ (cl1->host_client_id == cl2->host_client_id) &&
+ (cl1->me_client_id == cl2->me_client_id);
+}
+
+/**
+ * mei_io_list_flush - removes cbs belonging to cl.
+ *
+ * @list: an instance of our list structure
+ * @cl: host client, can be NULL for flushing the whole list
+ * @free: whether to free the cbs
+ */
+static void __mei_io_list_flush(struct mei_cl_cb *list,
+ struct mei_cl *cl, bool free)
{
struct mei_cl_cb *cb;
struct mei_cl_cb *next;
+ /* enable removing everything if no cl is specified */
list_for_each_entry_safe(cb, next, &list->list, list) {
- if (cb->cl && mei_cl_cmp_id(cl, cb->cl))
+ if (!cl || (cb->cl && mei_cl_cmp_id(cl, cb->cl))) {
list_del(&cb->list);
+ if (free)
+ mei_io_cb_free(cb);
+ }
}
}
/**
+ * mei_io_list_flush - removes list entry belonging to cl.
+ *
+ * @list: An instance of our list structure
+ * @cl: host client
+ */
+static inline void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl)
+{
+ __mei_io_list_flush(list, cl, false);
+}
+
+
+/**
+ * mei_io_list_free - removes cb belonging to cl and free them
+ *
+ * @list: An instance of our list structure
+ * @cl: host client
+ */
+static inline void mei_io_list_free(struct mei_cl_cb *list, struct mei_cl *cl)
+{
+ __mei_io_list_flush(list, cl, true);
+}
+
+/**
* mei_io_cb_free - free mei_cb_private related memory
*
* @cb: mei callback struct
@@ -154,7 +198,7 @@ int mei_io_cb_alloc_req_buf(struct mei_cl_cb *cb, size_t length)
return 0;
}
/**
- * mei_io_cb_alloc_resp_buf - allocate respose buffer
+ * mei_io_cb_alloc_resp_buf - allocate response buffer
*
* @cb: io callback structure
* @length: size of the buffer
@@ -187,13 +231,17 @@ int mei_io_cb_alloc_resp_buf(struct mei_cl_cb *cb, size_t length)
*/
int mei_cl_flush_queues(struct mei_cl *cl)
{
+ struct mei_device *dev;
+
if (WARN_ON(!cl || !cl->dev))
return -EINVAL;
- dev_dbg(&cl->dev->pdev->dev, "remove list entry belonging to cl\n");
+ dev = cl->dev;
+
+ cl_dbg(dev, cl, "remove list entry belonging to cl\n");
mei_io_list_flush(&cl->dev->read_list, cl);
- mei_io_list_flush(&cl->dev->write_list, cl);
- mei_io_list_flush(&cl->dev->write_waiting_list, cl);
+ mei_io_list_free(&cl->dev->write_list, cl);
+ mei_io_list_free(&cl->dev->write_waiting_list, cl);
mei_io_list_flush(&cl->dev->ctrl_wr_list, cl);
mei_io_list_flush(&cl->dev->ctrl_rd_list, cl);
mei_io_list_flush(&cl->dev->amthif_cmd_list, cl);
@@ -203,7 +251,7 @@ int mei_cl_flush_queues(struct mei_cl *cl)
/**
- * mei_cl_init - initializes intialize cl.
+ * mei_cl_init - initializes cl.
*
* @cl: host client to be initialized
* @dev: mei device
@@ -250,19 +298,18 @@ struct mei_cl *mei_cl_allocate(struct mei_device *dev)
struct mei_cl_cb *mei_cl_find_read_cb(struct mei_cl *cl)
{
struct mei_device *dev = cl->dev;
- struct mei_cl_cb *cb = NULL;
- struct mei_cl_cb *next = NULL;
+ struct mei_cl_cb *cb;
- list_for_each_entry_safe(cb, next, &dev->read_list.list, list)
+ list_for_each_entry(cb, &dev->read_list.list, list)
if (mei_cl_cmp_id(cl, cb->cl))
return cb;
return NULL;
}
-/** mei_cl_link: allocte host id in the host map
+/** mei_cl_link: allocate host id in the host map
*
* @cl - host client
- * @id - fixed host id or -1 for genereting one
+ * @id - fixed host id or -1 for generic one
*
* returns 0 on success
* -EINVAL on incorrect values
@@ -271,20 +318,28 @@ struct mei_cl_cb *mei_cl_find_read_cb(struct mei_cl *cl)
int mei_cl_link(struct mei_cl *cl, int id)
{
struct mei_device *dev;
+ long open_handle_count;
if (WARN_ON(!cl || !cl->dev))
return -EINVAL;
dev = cl->dev;
- /* If Id is not asigned get one*/
+ /* If Id is not assigned get one*/
if (id == MEI_HOST_CLIENT_ID_ANY)
id = find_first_zero_bit(dev->host_clients_map,
MEI_CLIENTS_MAX);
if (id >= MEI_CLIENTS_MAX) {
- dev_err(&dev->pdev->dev, "id exceded %d", MEI_CLIENTS_MAX) ;
- return -ENOENT;
+ dev_err(&dev->pdev->dev, "id exceeded %d", MEI_CLIENTS_MAX);
+ return -EMFILE;
+ }
+
+ open_handle_count = dev->open_handle_count + dev->iamthif_open_count;
+ if (open_handle_count >= MEI_MAX_OPEN_HANDLE_COUNT) {
+ dev_err(&dev->pdev->dev, "open_handle_count exceeded %d",
+ MEI_MAX_OPEN_HANDLE_COUNT);
+ return -EMFILE;
}
dev->open_handle_count++;
@@ -296,7 +351,7 @@ int mei_cl_link(struct mei_cl *cl, int id)
cl->state = MEI_FILE_INITIALIZING;
- dev_dbg(&dev->pdev->dev, "link cl host id = %d\n", cl->host_client_id);
+ cl_dbg(dev, cl, "link cl\n");
return 0;
}
@@ -308,7 +363,6 @@ int mei_cl_link(struct mei_cl *cl, int id)
int mei_cl_unlink(struct mei_cl *cl)
{
struct mei_device *dev;
- struct mei_cl *pos, *next;
/* don't shout on error exit path */
if (!cl)
@@ -320,14 +374,19 @@ int mei_cl_unlink(struct mei_cl *cl)
dev = cl->dev;
- list_for_each_entry_safe(pos, next, &dev->file_list, link) {
- if (cl->host_client_id == pos->host_client_id) {
- dev_dbg(&dev->pdev->dev, "remove host client = %d, ME client = %d\n",
- pos->host_client_id, pos->me_client_id);
- list_del_init(&pos->link);
- break;
- }
- }
+ cl_dbg(dev, cl, "unlink client");
+
+ if (dev->open_handle_count > 0)
+ dev->open_handle_count--;
+
+ /* never clear the 0 bit */
+ if (cl->host_client_id)
+ clear_bit(cl->host_client_id, dev->host_clients_map);
+
+ list_del_init(&cl->link);
+
+ cl->state = MEI_FILE_INITIALIZING;
+
return 0;
}
@@ -341,17 +400,6 @@ void mei_host_client_init(struct work_struct *work)
mutex_lock(&dev->device_lock);
- bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX);
- dev->open_handle_count = 0;
-
- /*
- * Reserving the first three client IDs
- * 0: Reserved for MEI Bus Message communications
- * 1: Reserved for Watchdog
- * 2: Reserved for AMTHI
- */
- bitmap_set(dev->host_clients_map, 0, 3);
-
for (i = 0; i < dev->me_clients_num; i++) {
client_props = &dev->me_clients[i].props;
@@ -365,13 +413,41 @@ void mei_host_client_init(struct work_struct *work)
}
dev->dev_state = MEI_DEV_ENABLED;
+ dev->reset_count = 0;
mutex_unlock(&dev->device_lock);
+
+ pm_runtime_mark_last_busy(&dev->pdev->dev);
+ dev_dbg(&dev->pdev->dev, "rpm: autosuspend\n");
+ pm_runtime_autosuspend(&dev->pdev->dev);
}
+/**
+ * mei_hbuf_acquire: try to acquire host buffer
+ *
+ * @dev: the device structure
+ * returns true if host buffer was acquired
+ */
+bool mei_hbuf_acquire(struct mei_device *dev)
+{
+ if (mei_pg_state(dev) == MEI_PG_ON ||
+ dev->pg_event == MEI_PG_EVENT_WAIT) {
+ dev_dbg(&dev->pdev->dev, "device is in pg\n");
+ return false;
+ }
+
+ if (!dev->hbuf_is_ready) {
+ dev_dbg(&dev->pdev->dev, "hbuf is not ready\n");
+ return false;
+ }
+
+ dev->hbuf_is_ready = false;
+
+ return true;
+}
/**
- * mei_cl_disconnect - disconnect host clinet form the me one
+ * mei_cl_disconnect - disconnect host client from the me one
*
* @cl: host client
*
@@ -390,25 +466,35 @@ int mei_cl_disconnect(struct mei_cl *cl)
dev = cl->dev;
+ cl_dbg(dev, cl, "disconnecting");
+
if (cl->state != MEI_FILE_DISCONNECTING)
return 0;
+ rets = pm_runtime_get(&dev->pdev->dev);
+ if (rets < 0 && rets != -EINPROGRESS) {
+ pm_runtime_put_noidle(&dev->pdev->dev);
+ cl_err(dev, cl, "rpm: get failed %d\n", rets);
+ return rets;
+ }
+
cb = mei_io_cb_init(cl, NULL);
- if (!cb)
- return -ENOMEM;
+ if (!cb) {
+ rets = -ENOMEM;
+ goto free;
+ }
cb->fop_type = MEI_FOP_CLOSE;
- if (dev->hbuf_is_ready) {
- dev->hbuf_is_ready = false;
+ if (mei_hbuf_acquire(dev)) {
if (mei_hbm_cl_disconnect_req(dev, cl)) {
rets = -ENODEV;
- dev_err(&dev->pdev->dev, "failed to disconnect.\n");
+ cl_err(dev, cl, "failed to disconnect.\n");
goto free;
}
mdelay(10); /* Wait for hardware disconnection ready */
list_add_tail(&cb->list, &dev->ctrl_rd_list.list);
} else {
- dev_dbg(&dev->pdev->dev, "add disconnect cb to control write list\n");
+ cl_dbg(dev, cl, "add disconnect cb to control write list\n");
list_add_tail(&cb->list, &dev->ctrl_wr_list.list);
}
@@ -421,23 +507,25 @@ int mei_cl_disconnect(struct mei_cl *cl)
mutex_lock(&dev->device_lock);
if (MEI_FILE_DISCONNECTED == cl->state) {
rets = 0;
- dev_dbg(&dev->pdev->dev, "successfully disconnected from FW client.\n");
+ cl_dbg(dev, cl, "successfully disconnected from FW client.\n");
} else {
rets = -ENODEV;
if (MEI_FILE_DISCONNECTED != cl->state)
- dev_dbg(&dev->pdev->dev, "wrong status client disconnect.\n");
+ cl_err(dev, cl, "wrong status client disconnect.\n");
if (err)
- dev_dbg(&dev->pdev->dev,
- "wait failed disconnect err=%08x\n",
- err);
+ cl_dbg(dev, cl, "wait failed disconnect err=%d\n", err);
- dev_dbg(&dev->pdev->dev, "failed to disconnect from FW client.\n");
+ cl_err(dev, cl, "failed to disconnect from FW client.\n");
}
mei_io_list_flush(&dev->ctrl_rd_list, cl);
mei_io_list_flush(&dev->ctrl_wr_list, cl);
free:
+ cl_dbg(dev, cl, "rpm: autosuspend\n");
+ pm_runtime_mark_last_busy(&dev->pdev->dev);
+ pm_runtime_put_autosuspend(&dev->pdev->dev);
+
mei_io_cb_free(cb);
return rets;
}
@@ -449,22 +537,22 @@ free:
*
* @cl: private data of the file object
*
- * returns ture if other client is connected, 0 - otherwise.
+ * returns true if other client is connected, false - otherwise.
*/
bool mei_cl_is_other_connecting(struct mei_cl *cl)
{
struct mei_device *dev;
- struct mei_cl *pos;
- struct mei_cl *next;
+ struct mei_cl *ocl; /* the other client */
if (WARN_ON(!cl || !cl->dev))
return false;
dev = cl->dev;
- list_for_each_entry_safe(pos, next, &dev->file_list, link) {
- if ((pos->state == MEI_FILE_CONNECTING) &&
- (pos != cl) && cl->me_client_id == pos->me_client_id)
+ list_for_each_entry(ocl, &dev->file_list, link) {
+ if (ocl->state == MEI_FILE_CONNECTING &&
+ ocl != cl &&
+ cl->me_client_id == ocl->me_client_id)
return true;
}
@@ -473,7 +561,7 @@ bool mei_cl_is_other_connecting(struct mei_cl *cl)
}
/**
- * mei_cl_connect - connect host clinet to the me one
+ * mei_cl_connect - connect host client to the me one
*
* @cl: host client
*
@@ -492,17 +580,24 @@ int mei_cl_connect(struct mei_cl *cl, struct file *file)
dev = cl->dev;
+ rets = pm_runtime_get(&dev->pdev->dev);
+ if (rets < 0 && rets != -EINPROGRESS) {
+ pm_runtime_put_noidle(&dev->pdev->dev);
+ cl_err(dev, cl, "rpm: get failed %d\n", rets);
+ return rets;
+ }
+
cb = mei_io_cb_init(cl, file);
if (!cb) {
rets = -ENOMEM;
goto out;
}
- cb->fop_type = MEI_FOP_IOCTL;
-
- if (dev->hbuf_is_ready && !mei_cl_is_other_connecting(cl)) {
- dev->hbuf_is_ready = false;
+ cb->fop_type = MEI_FOP_CONNECT;
+ /* run hbuf acquire last so we don't have to undo */
+ if (!mei_cl_is_other_connecting(cl) && mei_hbuf_acquire(dev)) {
+ cl->state = MEI_FILE_CONNECTING;
if (mei_hbm_cl_connect_req(dev, cl)) {
rets = -ENODEV;
goto out;
@@ -514,23 +609,28 @@ int mei_cl_connect(struct mei_cl *cl, struct file *file)
}
mutex_unlock(&dev->device_lock);
- rets = wait_event_timeout(dev->wait_recvd_msg,
- (cl->state == MEI_FILE_CONNECTED ||
- cl->state == MEI_FILE_DISCONNECTED),
- mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+ wait_event_timeout(dev->wait_recvd_msg,
+ (cl->state == MEI_FILE_CONNECTED ||
+ cl->state == MEI_FILE_DISCONNECTED),
+ mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
mutex_lock(&dev->device_lock);
if (cl->state != MEI_FILE_CONNECTED) {
- rets = -EFAULT;
+ /* something went really wrong */
+ if (!cl->status)
+ cl->status = -EFAULT;
mei_io_list_flush(&dev->ctrl_rd_list, cl);
mei_io_list_flush(&dev->ctrl_wr_list, cl);
- goto out;
}
rets = cl->status;
out:
+ cl_dbg(dev, cl, "rpm: autosuspend\n");
+ pm_runtime_mark_last_busy(&dev->pdev->dev);
+ pm_runtime_put_autosuspend(&dev->pdev->dev);
+
mei_io_cb_free(cb);
return rets;
}
@@ -547,7 +647,8 @@ out:
int mei_cl_flow_ctrl_creds(struct mei_cl *cl)
{
struct mei_device *dev;
- int i;
+ struct mei_me_client *me_cl;
+ int id;
if (WARN_ON(!cl || !cl->dev))
return -EINVAL;
@@ -560,19 +661,19 @@ int mei_cl_flow_ctrl_creds(struct mei_cl *cl)
if (cl->mei_flow_ctrl_creds > 0)
return 1;
- for (i = 0; i < dev->me_clients_num; i++) {
- struct mei_me_client *me_cl = &dev->me_clients[i];
- if (me_cl->client_id == cl->me_client_id) {
- if (me_cl->mei_flow_ctrl_creds) {
- if (WARN_ON(me_cl->props.single_recv_buf == 0))
- return -EINVAL;
- return 1;
- } else {
- return 0;
- }
- }
+ id = mei_me_cl_by_id(dev, cl->me_client_id);
+ if (id < 0) {
+ cl_err(dev, cl, "no such me client %d\n", cl->me_client_id);
+ return id;
}
- return -ENOENT;
+
+ me_cl = &dev->me_clients[id];
+ if (me_cl->mei_flow_ctrl_creds) {
+ if (WARN_ON(me_cl->props.single_recv_buf == 0))
+ return -EINVAL;
+ return 1;
+ }
+ return 0;
}
/**
@@ -588,32 +689,31 @@ int mei_cl_flow_ctrl_creds(struct mei_cl *cl)
int mei_cl_flow_ctrl_reduce(struct mei_cl *cl)
{
struct mei_device *dev;
- int i;
+ struct mei_me_client *me_cl;
+ int id;
if (WARN_ON(!cl || !cl->dev))
return -EINVAL;
dev = cl->dev;
- if (!dev->me_clients_num)
- return -ENOENT;
+ id = mei_me_cl_by_id(dev, cl->me_client_id);
+ if (id < 0) {
+ cl_err(dev, cl, "no such me client %d\n", cl->me_client_id);
+ return id;
+ }
- for (i = 0; i < dev->me_clients_num; i++) {
- struct mei_me_client *me_cl = &dev->me_clients[i];
- if (me_cl->client_id == cl->me_client_id) {
- if (me_cl->props.single_recv_buf != 0) {
- if (WARN_ON(me_cl->mei_flow_ctrl_creds <= 0))
- return -EINVAL;
- dev->me_clients[i].mei_flow_ctrl_creds--;
- } else {
- if (WARN_ON(cl->mei_flow_ctrl_creds <= 0))
- return -EINVAL;
- cl->mei_flow_ctrl_creds--;
- }
- return 0;
- }
+ me_cl = &dev->me_clients[id];
+ if (me_cl->props.single_recv_buf != 0) {
+ if (WARN_ON(me_cl->mei_flow_ctrl_creds <= 0))
+ return -EINVAL;
+ me_cl->mei_flow_ctrl_creds--;
+ } else {
+ if (WARN_ON(cl->mei_flow_ctrl_creds <= 0))
+ return -EINVAL;
+ cl->mei_flow_ctrl_creds--;
}
- return -ENOENT;
+ return 0;
}
/**
@@ -639,74 +739,111 @@ int mei_cl_read_start(struct mei_cl *cl, size_t length)
return -ENODEV;
if (cl->read_cb) {
- dev_dbg(&dev->pdev->dev, "read is pending.\n");
+ cl_dbg(dev, cl, "read is pending.\n");
return -EBUSY;
}
i = mei_me_cl_by_id(dev, cl->me_client_id);
if (i < 0) {
- dev_err(&dev->pdev->dev, "no such me client %d\n",
- cl->me_client_id);
- return -ENODEV;
+ cl_err(dev, cl, "no such me client %d\n", cl->me_client_id);
+ return -ENOTTY;
+ }
+
+ rets = pm_runtime_get(&dev->pdev->dev);
+ if (rets < 0 && rets != -EINPROGRESS) {
+ pm_runtime_put_noidle(&dev->pdev->dev);
+ cl_err(dev, cl, "rpm: get failed %d\n", rets);
+ return rets;
}
cb = mei_io_cb_init(cl, NULL);
- if (!cb)
- return -ENOMEM;
+ if (!cb) {
+ rets = -ENOMEM;
+ goto out;
+ }
/* always allocate at least client max message */
length = max_t(size_t, length, dev->me_clients[i].props.max_msg_length);
rets = mei_io_cb_alloc_resp_buf(cb, length);
if (rets)
- goto err;
+ goto out;
cb->fop_type = MEI_FOP_READ;
- cl->read_cb = cb;
- if (dev->hbuf_is_ready) {
- dev->hbuf_is_ready = false;
- if (mei_hbm_cl_flow_control_req(dev, cl)) {
- rets = -ENODEV;
- goto err;
- }
+ if (mei_hbuf_acquire(dev)) {
+ rets = mei_hbm_cl_flow_control_req(dev, cl);
+ if (rets < 0)
+ goto out;
+
list_add_tail(&cb->list, &dev->read_list.list);
} else {
list_add_tail(&cb->list, &dev->ctrl_wr_list.list);
}
- return rets;
-err:
- mei_io_cb_free(cb);
+
+ cl->read_cb = cb;
+
+out:
+ cl_dbg(dev, cl, "rpm: autosuspend\n");
+ pm_runtime_mark_last_busy(&dev->pdev->dev);
+ pm_runtime_put_autosuspend(&dev->pdev->dev);
+
+ if (rets)
+ mei_io_cb_free(cb);
+
return rets;
}
/**
- * mei_cl_irq_write_complete - write a message to device
+ * mei_cl_irq_write - write a message to device
* from the interrupt thread context
*
* @cl: client
* @cb: callback block.
- * @slots: free slots.
* @cmpl_list: complete list.
*
* returns 0, OK; otherwise error.
*/
-int mei_cl_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb,
- s32 *slots, struct mei_cl_cb *cmpl_list)
+int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
+ struct mei_cl_cb *cmpl_list)
{
- struct mei_device *dev = cl->dev;
+ struct mei_device *dev;
+ struct mei_msg_data *buf;
struct mei_msg_hdr mei_hdr;
- size_t len = cb->request_buffer.size - cb->buf_idx;
- u32 msg_slots = mei_data2slots(len);
+ size_t len;
+ u32 msg_slots;
+ int slots;
+ int rets;
+
+ if (WARN_ON(!cl || !cl->dev))
+ return -ENODEV;
+
+ dev = cl->dev;
+
+ buf = &cb->request_buffer;
+
+ rets = mei_cl_flow_ctrl_creds(cl);
+ if (rets < 0)
+ return rets;
+
+ if (rets == 0) {
+ cl_dbg(dev, cl, "No flow control credentials: not sending.\n");
+ return 0;
+ }
+
+ slots = mei_hbuf_empty_slots(dev);
+ len = buf->size - cb->buf_idx;
+ msg_slots = mei_data2slots(len);
mei_hdr.host_addr = cl->host_client_id;
mei_hdr.me_addr = cl->me_client_id;
mei_hdr.reserved = 0;
+ mei_hdr.internal = cb->internal;
- if (*slots >= msg_slots) {
+ if (slots >= msg_slots) {
mei_hdr.length = len;
mei_hdr.msg_complete = 1;
/* Split the message only if we can write the whole host buffer */
- } else if (*slots == dev->hbuf_depth) {
- msg_slots = *slots;
- len = (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr);
+ } else if (slots == dev->hbuf_depth) {
+ msg_slots = slots;
+ len = (slots * sizeof(u32)) - sizeof(struct mei_msg_hdr);
mei_hdr.length = len;
mei_hdr.msg_complete = 0;
} else {
@@ -714,16 +851,14 @@ int mei_cl_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb,
return 0;
}
- dev_dbg(&dev->pdev->dev, "buf: size = %d idx = %lu\n",
+ cl_dbg(dev, cl, "buf: size = %d idx = %lu\n",
cb->request_buffer.size, cb->buf_idx);
- dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(&mei_hdr));
- *slots -= msg_slots;
- if (mei_write_message(dev, &mei_hdr,
- cb->request_buffer.data + cb->buf_idx)) {
- cl->status = -ENODEV;
+ rets = mei_write_message(dev, &mei_hdr, buf->data + cb->buf_idx);
+ if (rets) {
+ cl->status = rets;
list_move_tail(&cb->list, &cmpl_list->list);
- return -ENODEV;
+ return rets;
}
cl->status = 0;
@@ -732,7 +867,7 @@ int mei_cl_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb,
if (mei_hdr.msg_complete) {
if (mei_cl_flow_ctrl_reduce(cl))
- return -ENODEV;
+ return -EIO;
list_move_tail(&cb->list, &dev->write_waiting_list.list);
}
@@ -746,7 +881,7 @@ int mei_cl_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb,
* @cl: host client
* @cl: write callback with filled data
*
- * returns numbe of bytes sent on success, <0 on failure.
+ * returns number of bytes sent on success, <0 on failure.
*/
int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking)
{
@@ -767,25 +902,39 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking)
buf = &cb->request_buffer;
- dev_dbg(&dev->pdev->dev, "mei_cl_write %d\n", buf->size);
+ cl_dbg(dev, cl, "mei_cl_write %d\n", buf->size);
+ rets = pm_runtime_get(&dev->pdev->dev);
+ if (rets < 0 && rets != -EINPROGRESS) {
+ pm_runtime_put_noidle(&dev->pdev->dev);
+ cl_err(dev, cl, "rpm: get failed %d\n", rets);
+ return rets;
+ }
cb->fop_type = MEI_FOP_WRITE;
+ cb->buf_idx = 0;
+ cl->writing_state = MEI_IDLE;
+
+ mei_hdr.host_addr = cl->host_client_id;
+ mei_hdr.me_addr = cl->me_client_id;
+ mei_hdr.reserved = 0;
+ mei_hdr.msg_complete = 0;
+ mei_hdr.internal = cb->internal;
rets = mei_cl_flow_ctrl_creds(cl);
if (rets < 0)
goto err;
- /* Host buffer is not ready, we queue the request */
- if (rets == 0 || !dev->hbuf_is_ready) {
- cb->buf_idx = 0;
- /* unseting complete will enqueue the cb for write */
- mei_hdr.msg_complete = 0;
+ if (rets == 0) {
+ cl_dbg(dev, cl, "No flow control credentials: not sending.\n");
+ rets = buf->size;
+ goto out;
+ }
+ if (!mei_hbuf_acquire(dev)) {
+ cl_dbg(dev, cl, "Cannot acquire the host buffer: not sending.\n");
rets = buf->size;
goto out;
}
-
- dev->hbuf_is_ready = false;
/* Check for a maximum length */
if (buf->size > mei_hbuf_max_len(dev)) {
@@ -796,29 +945,19 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking)
mei_hdr.msg_complete = 1;
}
- mei_hdr.host_addr = cl->host_client_id;
- mei_hdr.me_addr = cl->me_client_id;
- mei_hdr.reserved = 0;
-
- dev_dbg(&dev->pdev->dev, "write " MEI_HDR_FMT "\n",
- MEI_HDR_PRM(&mei_hdr));
-
-
- if (mei_write_message(dev, &mei_hdr, buf->data)) {
- rets = -EIO;
+ rets = mei_write_message(dev, &mei_hdr, buf->data);
+ if (rets)
goto err;
- }
cl->writing_state = MEI_WRITING;
cb->buf_idx = mei_hdr.length;
- rets = buf->size;
out:
if (mei_hdr.msg_complete) {
- if (mei_cl_flow_ctrl_reduce(cl)) {
- rets = -ENODEV;
+ rets = mei_cl_flow_ctrl_reduce(cl);
+ if (rets < 0)
goto err;
- }
+
list_add_tail(&cb->list, &dev->write_waiting_list.list);
} else {
list_add_tail(&cb->list, &dev->write_list.list);
@@ -828,16 +967,23 @@ out:
if (blocking && cl->writing_state != MEI_WRITE_COMPLETE) {
mutex_unlock(&dev->device_lock);
- if (wait_event_interruptible(cl->tx_wait,
- cl->writing_state == MEI_WRITE_COMPLETE)) {
- if (signal_pending(current))
- rets = -EINTR;
- else
- rets = -ERESTARTSYS;
- }
+ rets = wait_event_interruptible(cl->tx_wait,
+ cl->writing_state == MEI_WRITE_COMPLETE);
mutex_lock(&dev->device_lock);
+ /* wait_event_interruptible returns -ERESTARTSYS */
+ if (rets) {
+ if (signal_pending(current))
+ rets = -EINTR;
+ goto err;
+ }
}
+
+ rets = buf->size;
err:
+ cl_dbg(dev, cl, "rpm: autosuspend\n");
+ pm_runtime_mark_last_busy(&dev->pdev->dev);
+ pm_runtime_put_autosuspend(&dev->pdev->dev);
+
return rets;
}
@@ -877,12 +1023,11 @@ void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb)
void mei_cl_all_disconnect(struct mei_device *dev)
{
- struct mei_cl *cl, *next;
+ struct mei_cl *cl;
- list_for_each_entry_safe(cl, next, &dev->file_list, link) {
+ list_for_each_entry(cl, &dev->file_list, link) {
cl->state = MEI_FILE_DISCONNECTED;
cl->mei_flow_ctrl_creds = 0;
- cl->read_cb = NULL;
cl->timer_count = 0;
}
}
@@ -895,14 +1040,14 @@ void mei_cl_all_disconnect(struct mei_device *dev)
*/
void mei_cl_all_wakeup(struct mei_device *dev)
{
- struct mei_cl *cl, *next;
- list_for_each_entry_safe(cl, next, &dev->file_list, link) {
+ struct mei_cl *cl;
+ list_for_each_entry(cl, &dev->file_list, link) {
if (waitqueue_active(&cl->rx_wait)) {
- dev_dbg(&dev->pdev->dev, "Waking up reading client!\n");
+ cl_dbg(dev, cl, "Waking up reading client!\n");
wake_up_interruptible(&cl->rx_wait);
}
if (waitqueue_active(&cl->tx_wait)) {
- dev_dbg(&dev->pdev->dev, "Waking up writing client!\n");
+ cl_dbg(dev, cl, "Waking up writing client!\n");
wake_up_interruptible(&cl->tx_wait);
}
}
@@ -915,12 +1060,8 @@ void mei_cl_all_wakeup(struct mei_device *dev)
*/
void mei_cl_all_write_clear(struct mei_device *dev)
{
- struct mei_cl_cb *cb, *next;
-
- list_for_each_entry_safe(cb, next, &dev->write_list.list, list) {
- list_del(&cb->list);
- mei_io_cb_free(cb);
- }
+ mei_io_list_free(&dev->write_list, NULL);
+ mei_io_list_free(&dev->write_waiting_list, NULL);
}
diff --git a/drivers/misc/mei/client.h b/drivers/misc/mei/client.h
index 9eb031e9207..96d5de0389f 100644
--- a/drivers/misc/mei/client.h
+++ b/drivers/misc/mei/client.h
@@ -45,8 +45,6 @@ static inline void mei_io_list_init(struct mei_cl_cb *list)
{
INIT_LIST_HEAD(&list->list);
}
-void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl);
-
/*
* MEI Host Client Functions
*/
@@ -61,22 +59,6 @@ int mei_cl_unlink(struct mei_cl *cl);
int mei_cl_flush_queues(struct mei_cl *cl);
struct mei_cl_cb *mei_cl_find_read_cb(struct mei_cl *cl);
-/**
- * mei_cl_cmp_id - tells if file private data have same id
- *
- * @fe1: private data of 1. file object
- * @fe2: private data of 2. file object
- *
- * returns true - if ids are the same and not NULL
- */
-static inline bool mei_cl_cmp_id(const struct mei_cl *cl1,
- const struct mei_cl *cl2)
-{
- return cl1 && cl2 &&
- (cl1->host_client_id == cl2->host_client_id) &&
- (cl1->me_client_id == cl2->me_client_id);
-}
-
int mei_cl_flow_ctrl_creds(struct mei_cl *cl);
@@ -86,9 +68,15 @@ int mei_cl_flow_ctrl_reduce(struct mei_cl *cl);
*/
static inline bool mei_cl_is_connected(struct mei_cl *cl)
{
- return (cl->dev &&
+ return cl->dev &&
cl->dev->dev_state == MEI_DEV_ENABLED &&
- cl->state == MEI_FILE_CONNECTED);
+ cl->state == MEI_FILE_CONNECTED;
+}
+static inline bool mei_cl_is_transitioning(struct mei_cl *cl)
+{
+ return MEI_FILE_INITIALIZING == cl->state ||
+ MEI_FILE_DISCONNECTED == cl->state ||
+ MEI_FILE_DISCONNECTING == cl->state;
}
bool mei_cl_is_other_connecting(struct mei_cl *cl);
@@ -96,8 +84,8 @@ int mei_cl_disconnect(struct mei_cl *cl);
int mei_cl_connect(struct mei_cl *cl, struct file *file);
int mei_cl_read_start(struct mei_cl *cl, size_t length);
int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking);
-int mei_cl_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb,
- s32 *slots, struct mei_cl_cb *cmpl_list);
+int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
+ struct mei_cl_cb *cmpl_list);
void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb);
@@ -109,4 +97,13 @@ void mei_cl_all_disconnect(struct mei_device *dev);
void mei_cl_all_wakeup(struct mei_device *dev);
void mei_cl_all_write_clear(struct mei_device *dev);
+#define MEI_CL_FMT "cl:host=%02d me=%02d "
+#define MEI_CL_PRM(cl) (cl)->host_client_id, (cl)->me_client_id
+
+#define cl_dbg(dev, cl, format, arg...) \
+ dev_dbg(&(dev)->pdev->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
+
+#define cl_err(dev, cl, format, arg...) \
+ dev_err(&(dev)->pdev->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
+
#endif /* _MEI_CLIENT_H_ */
diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c
index e3870f22d23..ced5b777c70 100644
--- a/drivers/misc/mei/debugfs.c
+++ b/drivers/misc/mei/debugfs.c
@@ -43,7 +43,7 @@ static ssize_t mei_dbgfs_read_meclients(struct file *fp, char __user *ubuf,
mutex_lock(&dev->device_lock);
- /* if the driver is not enabled the list won't b consitent */
+ /* if the driver is not enabled the list won't be consistent */
if (dev->dev_state != MEI_DEV_ENABLED)
goto out;
@@ -75,6 +75,54 @@ static const struct file_operations mei_dbgfs_fops_meclients = {
.llseek = generic_file_llseek,
};
+static ssize_t mei_dbgfs_read_active(struct file *fp, char __user *ubuf,
+ size_t cnt, loff_t *ppos)
+{
+ struct mei_device *dev = fp->private_data;
+ struct mei_cl *cl;
+ const size_t bufsz = 1024;
+ char *buf;
+ int i = 0;
+ int pos = 0;
+ int ret;
+
+ if (!dev)
+ return -ENODEV;
+
+ buf = kzalloc(bufsz, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ pos += scnprintf(buf + pos, bufsz - pos,
+ " |me|host|state|rd|wr|\n");
+
+ mutex_lock(&dev->device_lock);
+
+ /* if the driver is not enabled the list won't b consitent */
+ if (dev->dev_state != MEI_DEV_ENABLED)
+ goto out;
+
+ list_for_each_entry(cl, &dev->file_list, link) {
+
+ pos += scnprintf(buf + pos, bufsz - pos,
+ "%2d|%2d|%4d|%5d|%2d|%2d|\n",
+ i, cl->me_client_id, cl->host_client_id, cl->state,
+ cl->reading_state, cl->writing_state);
+ i++;
+ }
+out:
+ mutex_unlock(&dev->device_lock);
+ ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
+ kfree(buf);
+ return ret;
+}
+
+static const struct file_operations mei_dbgfs_fops_active = {
+ .open = simple_open,
+ .read = mei_dbgfs_read_active,
+ .llseek = generic_file_llseek,
+};
+
static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf,
size_t cnt, loff_t *ppos)
{
@@ -101,7 +149,7 @@ static const struct file_operations mei_dbgfs_fops_devstate = {
/**
* mei_dbgfs_deregister - Remove the debugfs files and directories
- * @mei - pointer to mei device private dat
+ * @mei - pointer to mei device private data
*/
void mei_dbgfs_deregister(struct mei_device *dev)
{
@@ -128,6 +176,12 @@ int mei_dbgfs_register(struct mei_device *dev, const char *name)
dev_err(&dev->pdev->dev, "meclients: registration failed\n");
goto err;
}
+ f = debugfs_create_file("active", S_IRUSR, dir,
+ dev, &mei_dbgfs_fops_active);
+ if (!f) {
+ dev_err(&dev->pdev->dev, "meclients: registration failed\n");
+ goto err;
+ }
f = debugfs_create_file("devstate", S_IRUSR, dir,
dev, &mei_dbgfs_fops_devstate);
if (!f) {
diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index 6127ab64bb3..804106209d7 100644
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -14,50 +14,111 @@
*
*/
+#include <linux/export.h>
#include <linux/pci.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/mei.h>
+#include <linux/pm_runtime.h>
#include "mei_dev.h"
#include "hbm.h"
-#include "hw-me.h"
+#include "client.h"
+
+static const char *mei_cl_conn_status_str(enum mei_cl_connect_status status)
+{
+#define MEI_CL_CS(status) case MEI_CL_CONN_##status: return #status
+ switch (status) {
+ MEI_CL_CS(SUCCESS);
+ MEI_CL_CS(NOT_FOUND);
+ MEI_CL_CS(ALREADY_STARTED);
+ MEI_CL_CS(OUT_OF_RESOURCES);
+ MEI_CL_CS(MESSAGE_SMALL);
+ default: return "unknown";
+ }
+#undef MEI_CL_CCS
+}
+
+/**
+ * mei_cl_conn_status_to_errno - convert client connect response
+ * status to error code
+ *
+ * @status: client connect response status
+ *
+ * returns corresponding error code
+ */
+static int mei_cl_conn_status_to_errno(enum mei_cl_connect_status status)
+{
+ switch (status) {
+ case MEI_CL_CONN_SUCCESS: return 0;
+ case MEI_CL_CONN_NOT_FOUND: return -ENOTTY;
+ case MEI_CL_CONN_ALREADY_STARTED: return -EBUSY;
+ case MEI_CL_CONN_OUT_OF_RESOURCES: return -EBUSY;
+ case MEI_CL_CONN_MESSAGE_SMALL: return -EINVAL;
+ default: return -EINVAL;
+ }
+}
+
+/**
+ * mei_hbm_idle - set hbm to idle state
+ *
+ * @dev: the device structure
+ */
+void mei_hbm_idle(struct mei_device *dev)
+{
+ dev->init_clients_timer = 0;
+ dev->hbm_state = MEI_HBM_IDLE;
+}
+
+/**
+ * mei_hbm_reset - reset hbm counters and book keeping data structurs
+ *
+ * @dev: the device structure
+ */
+void mei_hbm_reset(struct mei_device *dev)
+{
+ dev->me_clients_num = 0;
+ dev->me_client_presentation_num = 0;
+ dev->me_client_index = 0;
+
+ kfree(dev->me_clients);
+ dev->me_clients = NULL;
+
+ mei_hbm_idle(dev);
+}
/**
* mei_hbm_me_cl_allocate - allocates storage for me clients
*
* @dev: the device structure
*
- * returns none.
+ * returns 0 on success -ENOMEM on allocation failure
*/
-static void mei_hbm_me_cl_allocate(struct mei_device *dev)
+static int mei_hbm_me_cl_allocate(struct mei_device *dev)
{
struct mei_me_client *clients;
int b;
+ mei_hbm_reset(dev);
+
/* count how many ME clients we have */
for_each_set_bit(b, dev->me_clients_map, MEI_CLIENTS_MAX)
dev->me_clients_num++;
- if (dev->me_clients_num <= 0)
- return;
-
- kfree(dev->me_clients);
- dev->me_clients = NULL;
+ if (dev->me_clients_num == 0)
+ return 0;
- dev_dbg(&dev->pdev->dev, "memory allocation for ME clients size=%zd.\n",
+ dev_dbg(&dev->pdev->dev, "memory allocation for ME clients size=%ld.\n",
dev->me_clients_num * sizeof(struct mei_me_client));
/* allocate storage for ME clients representation */
clients = kcalloc(dev->me_clients_num,
sizeof(struct mei_me_client), GFP_KERNEL);
if (!clients) {
dev_err(&dev->pdev->dev, "memory allocation for ME clients failed.\n");
- dev->dev_state = MEI_DEV_RESETTING;
- mei_reset(dev, 1);
- return;
+ return -ENOMEM;
}
dev->me_clients = clients;
- return;
+ return 0;
}
/**
@@ -81,12 +142,12 @@ void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len)
}
/**
- * same_disconn_addr - tells if they have the same address
+ * mei_hbm_cl_addr_equal - tells if they have the same address
*
- * @file: private data of the file object.
- * @disconn: disconnection request.
+ * @cl: - client
+ * @buf: buffer with cl header
*
- * returns true if addres are same
+ * returns true if addresses are the same
*/
static inline
bool mei_hbm_cl_addr_equal(struct mei_cl *cl, void *buf)
@@ -97,33 +158,6 @@ bool mei_hbm_cl_addr_equal(struct mei_cl *cl, void *buf)
}
-/**
- * is_treat_specially_client - checks if the message belongs
- * to the file private data.
- *
- * @cl: private data of the file object
- * @rs: connect response bus message
- *
- */
-static bool is_treat_specially_client(struct mei_cl *cl,
- struct hbm_client_connect_response *rs)
-{
- if (mei_hbm_cl_addr_equal(cl, rs)) {
- if (!rs->status) {
- cl->state = MEI_FILE_CONNECTED;
- cl->status = 0;
-
- } else {
- cl->state = MEI_FILE_DISCONNECTED;
- cl->status = -ENODEV;
- }
- cl->timer_count = 0;
-
- return true;
- }
- return false;
-}
-
int mei_hbm_start_wait(struct mei_device *dev)
{
int ret;
@@ -133,14 +167,14 @@ int mei_hbm_start_wait(struct mei_device *dev)
mutex_unlock(&dev->device_lock);
ret = wait_event_interruptible_timeout(dev->wait_recvd_msg,
dev->hbm_state == MEI_HBM_IDLE ||
- dev->hbm_state > MEI_HBM_START,
- mei_secs_to_jiffies(MEI_INTEROP_TIMEOUT));
+ dev->hbm_state >= MEI_HBM_STARTED,
+ mei_secs_to_jiffies(MEI_HBM_TIMEOUT));
mutex_lock(&dev->device_lock);
if (ret <= 0 && (dev->hbm_state <= MEI_HBM_START)) {
dev->hbm_state = MEI_HBM_IDLE;
dev_err(&dev->pdev->dev, "waiting for mei start failed\n");
- return -ETIMEDOUT;
+ return -ETIME;
}
return 0;
}
@@ -149,12 +183,15 @@ int mei_hbm_start_wait(struct mei_device *dev)
* mei_hbm_start_req - sends start request message.
*
* @dev: the device structure
+ *
+ * returns 0 on success and < 0 on failure
*/
int mei_hbm_start_req(struct mei_device *dev)
{
struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
struct hbm_host_version_request *start_req;
const size_t len = sizeof(struct hbm_host_version_request);
+ int ret;
mei_hbm_hdr(mei_hdr, len);
@@ -166,12 +203,13 @@ int mei_hbm_start_req(struct mei_device *dev)
start_req->host_version.minor_version = HBM_MINOR_VERSION;
dev->hbm_state = MEI_HBM_IDLE;
- if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
- dev_err(&dev->pdev->dev, "version message write failed\n");
- dev->dev_state = MEI_DEV_RESETTING;
- mei_reset(dev, 1);
- return -ENODEV;
+ ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data);
+ if (ret) {
+ dev_err(&dev->pdev->dev, "version message write failed: ret = %d\n",
+ ret);
+ return ret;
}
+
dev->hbm_state = MEI_HBM_START;
dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
return 0;
@@ -182,13 +220,15 @@ int mei_hbm_start_req(struct mei_device *dev)
*
* @dev: the device structure
*
- * returns none.
+ * returns 0 on success and < 0 on failure
*/
-static void mei_hbm_enum_clients_req(struct mei_device *dev)
+static int mei_hbm_enum_clients_req(struct mei_device *dev)
{
struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
struct hbm_host_enum_request *enum_req;
const size_t len = sizeof(struct hbm_host_enum_request);
+ int ret;
+
/* enumerate clients */
mei_hbm_hdr(mei_hdr, len);
@@ -196,14 +236,15 @@ static void mei_hbm_enum_clients_req(struct mei_device *dev)
memset(enum_req, 0, len);
enum_req->hbm_cmd = HOST_ENUM_REQ_CMD;
- if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
- dev->dev_state = MEI_DEV_RESETTING;
- dev_err(&dev->pdev->dev, "enumeration request write failed.\n");
- mei_reset(dev, 1);
+ ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data);
+ if (ret) {
+ dev_err(&dev->pdev->dev, "enumeration request write failed: ret = %d.\n",
+ ret);
+ return ret;
}
dev->hbm_state = MEI_HBM_ENUM_CLIENTS;
dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
- return;
+ return 0;
}
/**
@@ -211,7 +252,7 @@ static void mei_hbm_enum_clients_req(struct mei_device *dev)
*
* @dev: the device structure
*
- * returns none.
+ * returns 0 on success and < 0 on failure
*/
static int mei_hbm_prop_req(struct mei_device *dev)
@@ -221,8 +262,8 @@ static int mei_hbm_prop_req(struct mei_device *dev)
struct hbm_props_request *prop_req;
const size_t len = sizeof(struct hbm_props_request);
unsigned long next_client_index;
- u8 client_num;
-
+ unsigned long client_num;
+ int ret;
client_num = dev->me_client_presentation_num;
@@ -249,12 +290,11 @@ static int mei_hbm_prop_req(struct mei_device *dev)
prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
prop_req->address = next_client_index;
- if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
- dev->dev_state = MEI_DEV_RESETTING;
- dev_err(&dev->pdev->dev, "properties request write failed\n");
- mei_reset(dev, 1);
-
- return -EIO;
+ ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data);
+ if (ret) {
+ dev_err(&dev->pdev->dev, "properties request write failed: ret = %d\n",
+ ret);
+ return ret;
}
dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
@@ -263,18 +303,47 @@ static int mei_hbm_prop_req(struct mei_device *dev)
return 0;
}
+/*
+ * mei_hbm_pg - sends pg command
+ *
+ * @dev: the device structure
+ * @pg_cmd: the pg command code
+ *
+ * This function returns -EIO on write failure
+ */
+int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd)
+{
+ struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
+ struct hbm_power_gate *req;
+ const size_t len = sizeof(struct hbm_power_gate);
+ int ret;
+
+ mei_hbm_hdr(mei_hdr, len);
+
+ req = (struct hbm_power_gate *)dev->wr_msg.data;
+ memset(req, 0, len);
+ req->hbm_cmd = pg_cmd;
+
+ ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data);
+ if (ret)
+ dev_err(&dev->pdev->dev, "power gate command write failed.\n");
+ return ret;
+}
+EXPORT_SYMBOL_GPL(mei_hbm_pg);
+
/**
- * mei_hbm_stop_req_prepare - perpare stop request message
+ * mei_hbm_stop_req - send stop request message
*
* @dev - mei device
- * @mei_hdr - mei message header
- * @data - hbm message body buffer
+ * @cl: client info
+ *
+ * This function returns -EIO on write failure
*/
-static void mei_hbm_stop_req_prepare(struct mei_device *dev,
- struct mei_msg_hdr *mei_hdr, unsigned char *data)
+static int mei_hbm_stop_req(struct mei_device *dev)
{
+ struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
struct hbm_host_stop_request *req =
- (struct hbm_host_stop_request *)data;
+ (struct hbm_host_stop_request *)dev->wr_msg.data;
const size_t len = sizeof(struct hbm_host_stop_request);
mei_hbm_hdr(mei_hdr, len);
@@ -282,10 +351,12 @@ static void mei_hbm_stop_req_prepare(struct mei_device *dev,
memset(req, 0, len);
req->hbm_cmd = HOST_STOP_REQ_CMD;
req->reason = DRIVER_STOP_REQUEST;
+
+ return mei_write_message(dev, mei_hdr, dev->wr_msg.data);
}
/**
- * mei_hbm_cl_flow_control_req - sends flow control requst.
+ * mei_hbm_cl_flow_control_req - sends flow control request.
*
* @dev: the device structure
* @cl: client info
@@ -300,8 +371,7 @@ int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl)
mei_hbm_hdr(mei_hdr, len);
mei_hbm_cl_hdr(cl, MEI_FLOW_CONTROL_CMD, dev->wr_msg.data, len);
- dev_dbg(&dev->pdev->dev, "sending flow control host client = %d, ME client = %d\n",
- cl->host_client_id, cl->me_client_id);
+ cl_dbg(dev, cl, "sending flow control\n");
return mei_write_message(dev, mei_hdr, dev->wr_msg.data);
}
@@ -311,27 +381,34 @@ int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl)
*
* @dev: the device structure
* @flow: flow control.
+ *
+ * return 0 on success, < 0 otherwise
*/
-static void mei_hbm_add_single_flow_creds(struct mei_device *dev,
+static int mei_hbm_add_single_flow_creds(struct mei_device *dev,
struct hbm_flow_control *flow)
{
- struct mei_me_client *client;
- int i;
-
- for (i = 0; i < dev->me_clients_num; i++) {
- client = &dev->me_clients[i];
- if (client && flow->me_addr == client->client_id) {
- if (client->props.single_recv_buf) {
- client->mei_flow_ctrl_creds++;
- dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n",
- flow->me_addr);
- dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n",
- client->mei_flow_ctrl_creds);
- } else {
- BUG(); /* error in flow control */
- }
- }
+ struct mei_me_client *me_cl;
+ int id;
+
+ id = mei_me_cl_by_id(dev, flow->me_addr);
+ if (id < 0) {
+ dev_err(&dev->pdev->dev, "no such me client %d\n",
+ flow->me_addr);
+ return id;
+ }
+
+ me_cl = &dev->me_clients[id];
+ if (me_cl->props.single_recv_buf) {
+ me_cl->mei_flow_ctrl_creds++;
+ dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n",
+ flow->me_addr);
+ dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n",
+ me_cl->mei_flow_ctrl_creds);
+ } else {
+ BUG(); /* error in flow control */
}
+
+ return 0;
}
/**
@@ -343,8 +420,7 @@ static void mei_hbm_add_single_flow_creds(struct mei_device *dev,
static void mei_hbm_cl_flow_control_res(struct mei_device *dev,
struct hbm_flow_control *flow_control)
{
- struct mei_cl *cl = NULL;
- struct mei_cl *next = NULL;
+ struct mei_cl *cl;
if (!flow_control->host_addr) {
/* single receive buffer */
@@ -353,7 +429,7 @@ static void mei_hbm_cl_flow_control_res(struct mei_device *dev,
}
/* normal connection */
- list_for_each_entry_safe(cl, next, &dev->file_list, link) {
+ list_for_each_entry(cl, &dev->file_list, link) {
if (mei_hbm_cl_addr_equal(cl, flow_control)) {
cl->mei_flow_ctrl_creds++;
dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n",
@@ -386,6 +462,25 @@ int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl)
}
/**
+ * mei_hbm_cl_disconnect_rsp - sends disconnect respose to the FW
+ *
+ * @dev: the device structure
+ * @cl: a client to disconnect from
+ *
+ * This function returns -EIO on write failure
+ */
+int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl)
+{
+ struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
+ const size_t len = sizeof(struct hbm_client_connect_response);
+
+ mei_hbm_hdr(mei_hdr, len);
+ mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_RES_CMD, dev->wr_msg.data, len);
+
+ return mei_write_message(dev, mei_hdr, dev->wr_msg.data);
+}
+
+/**
* mei_hbm_cl_disconnect_res - disconnect response from ME
*
* @dev: the device structure
@@ -395,29 +490,23 @@ static void mei_hbm_cl_disconnect_res(struct mei_device *dev,
struct hbm_client_connect_response *rs)
{
struct mei_cl *cl;
- struct mei_cl_cb *pos = NULL, *next = NULL;
-
- dev_dbg(&dev->pdev->dev,
- "disconnect_response:\n"
- "ME Client = %d\n"
- "Host Client = %d\n"
- "Status = %d\n",
- rs->me_addr,
- rs->host_addr,
- rs->status);
-
- list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) {
- cl = pos->cl;
-
- if (!cl) {
- list_del(&pos->list);
+ struct mei_cl_cb *cb, *next;
+
+ dev_dbg(&dev->pdev->dev, "hbm: disconnect response cl:host=%02d me=%02d status=%d\n",
+ rs->me_addr, rs->host_addr, rs->status);
+
+ list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) {
+ cl = cb->cl;
+
+ /* this should not happen */
+ if (WARN_ON(!cl)) {
+ list_del(&cb->list);
return;
}
- dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n");
if (mei_hbm_cl_addr_equal(cl, rs)) {
- list_del(&pos->list);
- if (!rs->status)
+ list_del(&cb->list);
+ if (rs->status == MEI_CL_DISCONN_SUCCESS)
cl->state = MEI_FILE_DISCONNECTED;
cl->status = 0;
@@ -447,7 +536,7 @@ int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl)
}
/**
- * mei_hbm_cl_connect_res - connect resposne from the ME
+ * mei_hbm_cl_connect_res - connect response from the ME
*
* @dev: the device structure
* @rs: connect response bus message
@@ -457,81 +546,78 @@ static void mei_hbm_cl_connect_res(struct mei_device *dev,
{
struct mei_cl *cl;
- struct mei_cl_cb *pos = NULL, *next = NULL;
+ struct mei_cl_cb *cb, *next;
- dev_dbg(&dev->pdev->dev,
- "connect_response:\n"
- "ME Client = %d\n"
- "Host Client = %d\n"
- "Status = %d\n",
- rs->me_addr,
- rs->host_addr,
- rs->status);
+ dev_dbg(&dev->pdev->dev, "hbm: connect response cl:host=%02d me=%02d status=%s\n",
+ rs->me_addr, rs->host_addr,
+ mei_cl_conn_status_str(rs->status));
- /* if WD or iamthif client treat specially */
+ cl = NULL;
- if (is_treat_specially_client(&dev->wd_cl, rs)) {
- dev_dbg(&dev->pdev->dev, "successfully connected to WD client.\n");
- mei_watchdog_register(dev);
+ list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) {
- return;
- }
+ cl = cb->cl;
+ /* this should not happen */
+ if (WARN_ON(!cl)) {
+ list_del_init(&cb->list);
+ continue;
+ }
- if (is_treat_specially_client(&dev->iamthif_cl, rs)) {
- dev->iamthif_state = MEI_IAMTHIF_IDLE;
- return;
- }
- list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) {
+ if (cb->fop_type != MEI_FOP_CONNECT)
+ continue;
- cl = pos->cl;
- if (!cl) {
- list_del(&pos->list);
- return;
- }
- if (pos->fop_type == MEI_FOP_IOCTL) {
- if (is_treat_specially_client(cl, rs)) {
- list_del(&pos->list);
- cl->status = 0;
- cl->timer_count = 0;
- break;
- }
+ if (mei_hbm_cl_addr_equal(cl, rs)) {
+ list_del(&cb->list);
+ break;
}
}
+
+ if (!cl)
+ return;
+
+ cl->timer_count = 0;
+ if (rs->status == MEI_CL_CONN_SUCCESS)
+ cl->state = MEI_FILE_CONNECTED;
+ else
+ cl->state = MEI_FILE_DISCONNECTED;
+ cl->status = mei_cl_conn_status_to_errno(rs->status);
}
/**
- * mei_hbm_fw_disconnect_req - disconnect request initiated by me
- * host sends disoconnect response
+ * mei_hbm_fw_disconnect_req - disconnect request initiated by ME firmware
+ * host sends disconnect response
*
* @dev: the device structure.
* @disconnect_req: disconnect request bus message from the me
+ *
+ * returns -ENOMEM on allocation failure
*/
-static void mei_hbm_fw_disconnect_req(struct mei_device *dev,
+static int mei_hbm_fw_disconnect_req(struct mei_device *dev,
struct hbm_client_connect_request *disconnect_req)
{
- struct mei_cl *cl, *next;
- const size_t len = sizeof(struct hbm_client_connect_response);
+ struct mei_cl *cl;
+ struct mei_cl_cb *cb;
- list_for_each_entry_safe(cl, next, &dev->file_list, link) {
+ list_for_each_entry(cl, &dev->file_list, link) {
if (mei_hbm_cl_addr_equal(cl, disconnect_req)) {
dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n",
disconnect_req->host_addr,
disconnect_req->me_addr);
cl->state = MEI_FILE_DISCONNECTED;
cl->timer_count = 0;
- if (cl == &dev->wd_cl)
- dev->wd_pending = false;
- else if (cl == &dev->iamthif_cl)
- dev->iamthif_timer = 0;
-
- /* prepare disconnect response */
- mei_hbm_hdr(&dev->wr_ext_msg.hdr, len);
- mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_RES_CMD,
- dev->wr_ext_msg.data, len);
+
+ cb = mei_io_cb_init(cl, NULL);
+ if (!cb)
+ return -ENOMEM;
+ cb->fop_type = MEI_FOP_DISCONNECT_RSP;
+ cl_dbg(dev, cl, "add disconnect response as first\n");
+ list_add(&cb->list, &dev->ctrl_wr_list.list);
+
break;
}
}
+ return 0;
}
@@ -555,8 +641,10 @@ bool mei_hbm_version_is_supported(struct mei_device *dev)
*
* @dev: the device structure
* @mei_hdr: header of bus message
+ *
+ * returns 0 on success and < 0 on failure
*/
-void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
+int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
{
struct mei_bus_message *mei_msg;
struct mei_me_client *me_client;
@@ -573,8 +661,20 @@ void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
mei_read_slots(dev, dev->rd_msg_buf, hdr->length);
mei_msg = (struct mei_bus_message *)dev->rd_msg_buf;
+ /* ignore spurious message and prevent reset nesting
+ * hbm is put to idle during system reset
+ */
+ if (dev->hbm_state == MEI_HBM_IDLE) {
+ dev_dbg(&dev->pdev->dev, "hbm: state is idle ignore spurious messages\n");
+ return 0;
+ }
+
switch (mei_msg->hbm_cmd) {
case HOST_START_RES_CMD:
+ dev_dbg(&dev->pdev->dev, "hbm: start: response message received.\n");
+
+ dev->init_clients_timer = 0;
+
version_res = (struct hbm_host_version_response *)mei_msg;
dev_dbg(&dev->pdev->dev, "HBM VERSION: DRIVER=%02d:%02d DEVICE=%02d:%02d\n",
@@ -593,73 +693,107 @@ void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
}
if (!mei_hbm_version_is_supported(dev)) {
- dev_warn(&dev->pdev->dev, "hbm version mismatch: stopping the driver.\n");
+ dev_warn(&dev->pdev->dev, "hbm: start: version mismatch - stopping the driver.\n");
- dev->hbm_state = MEI_HBM_STOP;
- mei_hbm_stop_req_prepare(dev, &dev->wr_msg.hdr,
- dev->wr_msg.data);
- mei_write_message(dev, &dev->wr_msg.hdr,
- dev->wr_msg.data);
+ dev->hbm_state = MEI_HBM_STOPPED;
+ if (mei_hbm_stop_req(dev)) {
+ dev_err(&dev->pdev->dev, "hbm: start: failed to send stop request\n");
+ return -EIO;
+ }
+ break;
+ }
- return;
+ if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
+ dev->hbm_state != MEI_HBM_START) {
+ dev_err(&dev->pdev->dev, "hbm: start: state mismatch, [%d, %d]\n",
+ dev->dev_state, dev->hbm_state);
+ return -EPROTO;
}
- if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
- dev->hbm_state == MEI_HBM_START) {
- dev->init_clients_timer = 0;
- mei_hbm_enum_clients_req(dev);
- } else {
- dev_err(&dev->pdev->dev, "reset: wrong host start response\n");
- mei_reset(dev, 1);
- return;
+ dev->hbm_state = MEI_HBM_STARTED;
+
+ if (mei_hbm_enum_clients_req(dev)) {
+ dev_err(&dev->pdev->dev, "hbm: start: failed to send enumeration request\n");
+ return -EIO;
}
wake_up_interruptible(&dev->wait_recvd_msg);
- dev_dbg(&dev->pdev->dev, "host start response message received.\n");
break;
case CLIENT_CONNECT_RES_CMD:
+ dev_dbg(&dev->pdev->dev, "hbm: client connect response: message received.\n");
+
connect_res = (struct hbm_client_connect_response *) mei_msg;
mei_hbm_cl_connect_res(dev, connect_res);
- dev_dbg(&dev->pdev->dev, "client connect response message received.\n");
wake_up(&dev->wait_recvd_msg);
break;
case CLIENT_DISCONNECT_RES_CMD:
+ dev_dbg(&dev->pdev->dev, "hbm: client disconnect response: message received.\n");
+
disconnect_res = (struct hbm_client_connect_response *) mei_msg;
mei_hbm_cl_disconnect_res(dev, disconnect_res);
- dev_dbg(&dev->pdev->dev, "client disconnect response message received.\n");
wake_up(&dev->wait_recvd_msg);
break;
case MEI_FLOW_CONTROL_CMD:
+ dev_dbg(&dev->pdev->dev, "hbm: client flow control response: message received.\n");
+
flow_control = (struct hbm_flow_control *) mei_msg;
mei_hbm_cl_flow_control_res(dev, flow_control);
- dev_dbg(&dev->pdev->dev, "client flow control response message received.\n");
+ break;
+
+ case MEI_PG_ISOLATION_ENTRY_RES_CMD:
+ dev_dbg(&dev->pdev->dev, "power gate isolation entry response received\n");
+ dev->pg_event = MEI_PG_EVENT_RECEIVED;
+ if (waitqueue_active(&dev->wait_pg))
+ wake_up(&dev->wait_pg);
+ break;
+
+ case MEI_PG_ISOLATION_EXIT_REQ_CMD:
+ dev_dbg(&dev->pdev->dev, "power gate isolation exit request received\n");
+ dev->pg_event = MEI_PG_EVENT_RECEIVED;
+ if (waitqueue_active(&dev->wait_pg))
+ wake_up(&dev->wait_pg);
+ else
+ /*
+ * If the driver is not waiting on this then
+ * this is HW initiated exit from PG.
+ * Start runtime pm resume sequence to exit from PG.
+ */
+ pm_request_resume(&dev->pdev->dev);
break;
case HOST_CLIENT_PROPERTIES_RES_CMD:
+ dev_dbg(&dev->pdev->dev, "hbm: properties response: message received.\n");
+
+ dev->init_clients_timer = 0;
+
+ if (dev->me_clients == NULL) {
+ dev_err(&dev->pdev->dev, "hbm: properties response: mei_clients not allocated\n");
+ return -EPROTO;
+ }
+
props_res = (struct hbm_props_response *)mei_msg;
me_client = &dev->me_clients[dev->me_client_presentation_num];
- if (props_res->status || !dev->me_clients) {
- dev_err(&dev->pdev->dev, "reset: properties response hbm wrong status.\n");
- mei_reset(dev, 1);
- return;
+ if (props_res->status) {
+ dev_err(&dev->pdev->dev, "hbm: properties response: wrong status = %d\n",
+ props_res->status);
+ return -EPROTO;
}
if (me_client->client_id != props_res->address) {
- dev_err(&dev->pdev->dev, "reset: host properties response address mismatch\n");
- mei_reset(dev, 1);
- return;
+ dev_err(&dev->pdev->dev, "hbm: properties response: address mismatch %d ?= %d\n",
+ me_client->client_id, props_res->address);
+ return -EPROTO;
}
if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) {
- dev_err(&dev->pdev->dev, "reset: unexpected properties response\n");
- mei_reset(dev, 1);
-
- return;
+ dev_err(&dev->pdev->dev, "hbm: properties response: state mismatch, [%d, %d]\n",
+ dev->dev_state, dev->hbm_state);
+ return -EPROTO;
}
me_client->props = props_res->client_properties;
@@ -667,55 +801,79 @@ void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
dev->me_client_presentation_num++;
/* request property for the next client */
- mei_hbm_prop_req(dev);
+ if (mei_hbm_prop_req(dev))
+ return -EIO;
break;
case HOST_ENUM_RES_CMD:
+ dev_dbg(&dev->pdev->dev, "hbm: enumeration response: message received\n");
+
+ dev->init_clients_timer = 0;
+
enum_res = (struct hbm_host_enum_response *) mei_msg;
- memcpy(dev->me_clients_map, enum_res->valid_addresses, 32);
- if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
- dev->hbm_state == MEI_HBM_ENUM_CLIENTS) {
- dev->init_clients_timer = 0;
- dev->me_client_presentation_num = 0;
- dev->me_client_index = 0;
- mei_hbm_me_cl_allocate(dev);
- dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES;
-
- /* first property reqeust */
- mei_hbm_prop_req(dev);
- } else {
- dev_err(&dev->pdev->dev, "reset: unexpected enumeration response hbm.\n");
- mei_reset(dev, 1);
- return;
+ BUILD_BUG_ON(sizeof(dev->me_clients_map)
+ < sizeof(enum_res->valid_addresses));
+ memcpy(dev->me_clients_map, enum_res->valid_addresses,
+ sizeof(enum_res->valid_addresses));
+
+ if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
+ dev->hbm_state != MEI_HBM_ENUM_CLIENTS) {
+ dev_err(&dev->pdev->dev, "hbm: enumeration response: state mismatch, [%d, %d]\n",
+ dev->dev_state, dev->hbm_state);
+ return -EPROTO;
+ }
+
+ if (mei_hbm_me_cl_allocate(dev)) {
+ dev_err(&dev->pdev->dev, "hbm: enumeration response: cannot allocate clients array\n");
+ return -ENOMEM;
}
+
+ dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES;
+
+ /* first property request */
+ if (mei_hbm_prop_req(dev))
+ return -EIO;
+
break;
case HOST_STOP_RES_CMD:
+ dev_dbg(&dev->pdev->dev, "hbm: stop response: message received\n");
+
+ dev->init_clients_timer = 0;
- if (dev->hbm_state != MEI_HBM_STOP)
- dev_err(&dev->pdev->dev, "unexpected stop response hbm.\n");
- dev->dev_state = MEI_DEV_DISABLED;
- dev_info(&dev->pdev->dev, "reset: FW stop response.\n");
- mei_reset(dev, 1);
+ if (dev->hbm_state != MEI_HBM_STOPPED) {
+ dev_err(&dev->pdev->dev, "hbm: stop response: state mismatch, [%d, %d]\n",
+ dev->dev_state, dev->hbm_state);
+ return -EPROTO;
+ }
+
+ dev->dev_state = MEI_DEV_POWER_DOWN;
+ dev_info(&dev->pdev->dev, "hbm: stop response: resetting.\n");
+ /* force the reset */
+ return -EPROTO;
break;
case CLIENT_DISCONNECT_REQ_CMD:
- /* search for client */
+ dev_dbg(&dev->pdev->dev, "hbm: disconnect request: message received\n");
+
disconnect_req = (struct hbm_client_connect_request *)mei_msg;
mei_hbm_fw_disconnect_req(dev, disconnect_req);
break;
case ME_STOP_REQ_CMD:
-
- dev->hbm_state = MEI_HBM_STOP;
- mei_hbm_stop_req_prepare(dev, &dev->wr_ext_msg.hdr,
- dev->wr_ext_msg.data);
+ dev_dbg(&dev->pdev->dev, "hbm: stop request: message received\n");
+ dev->hbm_state = MEI_HBM_STOPPED;
+ if (mei_hbm_stop_req(dev)) {
+ dev_err(&dev->pdev->dev, "hbm: start: failed to send stop request\n");
+ return -EIO;
+ }
break;
default:
BUG();
break;
}
+ return 0;
}
diff --git a/drivers/misc/mei/hbm.h b/drivers/misc/mei/hbm.h
index 4ae2e56e404..683eb2835ce 100644
--- a/drivers/misc/mei/hbm.h
+++ b/drivers/misc/mei/hbm.h
@@ -32,13 +32,13 @@ struct mei_cl;
enum mei_hbm_state {
MEI_HBM_IDLE = 0,
MEI_HBM_START,
+ MEI_HBM_STARTED,
MEI_HBM_ENUM_CLIENTS,
MEI_HBM_CLIENT_PROPERTIES,
- MEI_HBM_STARTED,
- MEI_HBM_STOP,
+ MEI_HBM_STOPPED,
};
-void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr);
+int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr);
static inline void mei_hbm_hdr(struct mei_msg_hdr *hdr, size_t length)
{
@@ -49,12 +49,16 @@ static inline void mei_hbm_hdr(struct mei_msg_hdr *hdr, size_t length)
hdr->reserved = 0;
}
+void mei_hbm_idle(struct mei_device *dev);
+void mei_hbm_reset(struct mei_device *dev);
int mei_hbm_start_req(struct mei_device *dev);
int mei_hbm_start_wait(struct mei_device *dev);
int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl);
int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl);
+int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl);
int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl);
bool mei_hbm_version_is_supported(struct mei_device *dev);
+int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd);
#endif /* _MEI_HBM_H_ */
diff --git a/drivers/misc/mei/hw-me-regs.h b/drivers/misc/mei/hw-me-regs.h
index 6a203b6e834..a7856c0ac57 100644
--- a/drivers/misc/mei/hw-me-regs.h
+++ b/drivers/misc/mei/hw-me-regs.h
@@ -109,8 +109,17 @@
#define MEI_DEV_ID_PPT_2 0x1CBA /* Panther Point */
#define MEI_DEV_ID_PPT_3 0x1DBA /* Panther Point */
-#define MEI_DEV_ID_LPT 0x8C3A /* Lynx Point */
+#define MEI_DEV_ID_LPT_H 0x8C3A /* Lynx Point H */
+#define MEI_DEV_ID_LPT_W 0x8D3A /* Lynx Point - Wellsburg */
#define MEI_DEV_ID_LPT_LP 0x9C3A /* Lynx Point LP */
+#define MEI_DEV_ID_LPT_HR 0x8CBA /* Lynx Point H Refresh */
+
+#define MEI_DEV_ID_WPT_LP 0x9CBA /* Wildcat Point LP */
+
+/* Host Firmware Status Registers in PCI Config Space */
+#define PCI_CFG_HFS_1 0x40
+#define PCI_CFG_HFS_2 0x48
+
/*
* MEI HW Section
*/
@@ -124,6 +133,8 @@
#define ME_CB_RW 8
/* ME_CSR_HA - ME Control Status Host Access register (read only) */
#define ME_CSR_HA 0xC
+/* H_HGC_CSR - PGI register */
+#define H_HPG_CSR 0x10
/* register bits of H_CSR (Host Control Status register) */
@@ -153,6 +164,8 @@ access to ME_CBD */
#define ME_CBWP_HRA 0x00FF0000
/* ME CB Read Pointer HRA - host read only access to ME_CBRP */
#define ME_CBRP_HRA 0x0000FF00
+/* ME Power Gate Isolation Capability HRA - host ready only access */
+#define ME_PGIC_HRA 0x00000040
/* ME Reset HRA - host read only access to ME_RST */
#define ME_RST_HRA 0x00000010
/* ME Ready HRA - host read only access to ME_RDY */
@@ -164,4 +177,9 @@ access to ME_CBD */
/* ME Interrupt Enable HRA - host read only access to ME_IE */
#define ME_IE_HRA 0x00000001
+
+/* register bits - H_HPG_CSR */
+#define H_HPG_CSR_PGIHEXR 0x00000001
+#define H_HPG_CSR_PGI 0x00000002
+
#endif /* _MEI_HW_MEI_REGS_H_ */
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 3412adcdaeb..6a2d272cea4 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -20,10 +20,10 @@
#include <linux/interrupt.h>
#include "mei_dev.h"
-#include "hw-me.h"
-
#include "hbm.h"
+#include "hw-me.h"
+#include "hw-me-regs.h"
/**
* mei_me_reg_read - Reads 32bit data from the mei device
@@ -109,10 +109,27 @@ static inline void mei_hcsr_set(struct mei_me_hw *hw, u32 hcsr)
*/
static void mei_me_hw_config(struct mei_device *dev)
{
+ struct mei_me_hw *hw = to_me_hw(dev);
u32 hcsr = mei_hcsr_read(to_me_hw(dev));
/* Doesn't change in runtime */
dev->hbuf_depth = (hcsr & H_CBD) >> 24;
+
+ hw->pg_state = MEI_PG_OFF;
}
+
+/**
+ * mei_me_pg_state - translate internal pg state
+ * to the mei power gating state
+ *
+ * @hw - me hardware
+ * returns: MEI_PG_OFF if aliveness is on and MEI_PG_ON otherwise
+ */
+static inline enum mei_pg_state mei_me_pg_state(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ return hw->pg_state;
+}
+
/**
* mei_clear_interrupts - clear and stop interrupts
*
@@ -164,6 +181,9 @@ static void mei_me_hw_reset_release(struct mei_device *dev)
hcsr |= H_IG;
hcsr &= ~H_RST;
mei_hcsr_set(hw, hcsr);
+
+ /* complete this write before we set host ready on another CPU */
+ mmiowb();
}
/**
* mei_me_hw_reset - resets fw via mei csr register.
@@ -183,9 +203,22 @@ static int mei_me_hw_reset(struct mei_device *dev, bool intr_enable)
else
hcsr &= ~H_IE;
+ dev->recvd_hw_ready = false;
mei_me_reg_write(hw, H_CSR, hcsr);
- if (dev->dev_state == MEI_DEV_POWER_DOWN)
+ /*
+ * Host reads the H_CSR once to ensure that the
+ * posted write to H_CSR completes.
+ */
+ hcsr = mei_hcsr_read(hw);
+
+ if ((hcsr & H_RST) == 0)
+ dev_warn(&dev->pdev->dev, "H_RST is not set = 0x%08X", hcsr);
+
+ if ((hcsr & H_RDY) == H_RDY)
+ dev_warn(&dev->pdev->dev, "H_RDY is not cleared 0x%08X", hcsr);
+
+ if (intr_enable == false)
mei_me_hw_reset_release(dev);
return 0;
@@ -201,6 +234,7 @@ static int mei_me_hw_reset(struct mei_device *dev, bool intr_enable)
static void mei_me_host_set_ready(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
+ hw->host_hw_state = mei_hcsr_read(hw);
hw->host_hw_state |= H_IE | H_IG | H_RDY;
mei_hcsr_set(hw, hw->host_hw_state);
}
@@ -233,18 +267,15 @@ static bool mei_me_hw_is_ready(struct mei_device *dev)
static int mei_me_hw_ready_wait(struct mei_device *dev)
{
int err;
- if (mei_me_hw_is_ready(dev))
- return 0;
- dev->recvd_hw_ready = false;
mutex_unlock(&dev->device_lock);
err = wait_event_interruptible_timeout(dev->wait_hw_ready,
dev->recvd_hw_ready,
- mei_secs_to_jiffies(MEI_INTEROP_TIMEOUT));
+ mei_secs_to_jiffies(MEI_HW_READY_TIMEOUT));
mutex_lock(&dev->device_lock);
if (!err && !dev->recvd_hw_ready) {
if (!err)
- err = -ETIMEDOUT;
+ err = -ETIME;
dev_err(&dev->pdev->dev,
"wait hw ready failed. status = %d\n", err);
return err;
@@ -303,7 +334,7 @@ static bool mei_me_hbuf_is_empty(struct mei_device *dev)
*
* @dev: the device structure
*
- * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise empty slots count
+ * returns -EOVERFLOW if overflow, otherwise empty slots count
*/
static int mei_me_hbuf_empty_slots(struct mei_device *dev)
{
@@ -326,7 +357,7 @@ static size_t mei_me_hbuf_max_len(const struct mei_device *dev)
/**
- * mei_write_message - writes a message to mei device.
+ * mei_me_write_message - writes a message to mei device.
*
* @dev: the device structure
* @header: mei HECI header of message
@@ -354,7 +385,7 @@ static int mei_me_write_message(struct mei_device *dev,
dw_cnt = mei_data2slots(length);
if (empty_slots < 0 || dw_cnt > empty_slots)
- return -EIO;
+ return -EMSGSIZE;
mei_me_reg_write(hw, H_CB_WW, *((u32 *) header));
@@ -381,7 +412,7 @@ static int mei_me_write_message(struct mei_device *dev,
*
* @dev: the device structure
*
- * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise filled slots count
+ * returns -EOVERFLOW if overflow, otherwise filled slots count
*/
static int mei_me_count_full_read_slots(struct mei_device *dev)
{
@@ -431,6 +462,144 @@ static int mei_me_read_slots(struct mei_device *dev, unsigned char *buffer,
}
/**
+ * mei_me_pg_enter - write pg enter register to mei device.
+ *
+ * @dev: the device structure
+ */
+static void mei_me_pg_enter(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ u32 reg = mei_me_reg_read(hw, H_HPG_CSR);
+ reg |= H_HPG_CSR_PGI;
+ mei_me_reg_write(hw, H_HPG_CSR, reg);
+}
+
+/**
+ * mei_me_pg_enter - write pg enter register to mei device.
+ *
+ * @dev: the device structure
+ */
+static void mei_me_pg_exit(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ u32 reg = mei_me_reg_read(hw, H_HPG_CSR);
+
+ WARN(!(reg & H_HPG_CSR_PGI), "PGI is not set\n");
+
+ reg |= H_HPG_CSR_PGIHEXR;
+ mei_me_reg_write(hw, H_HPG_CSR, reg);
+}
+
+/**
+ * mei_me_pg_set_sync - perform pg entry procedure
+ *
+ * @dev: the device structure
+ *
+ * returns 0 on success an error code otherwise
+ */
+int mei_me_pg_set_sync(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ unsigned long timeout = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
+ int ret;
+
+ dev->pg_event = MEI_PG_EVENT_WAIT;
+
+ ret = mei_hbm_pg(dev, MEI_PG_ISOLATION_ENTRY_REQ_CMD);
+ if (ret)
+ return ret;
+
+ mutex_unlock(&dev->device_lock);
+ wait_event_timeout(dev->wait_pg,
+ dev->pg_event == MEI_PG_EVENT_RECEIVED, timeout);
+ mutex_lock(&dev->device_lock);
+
+ if (dev->pg_event == MEI_PG_EVENT_RECEIVED) {
+ mei_me_pg_enter(dev);
+ ret = 0;
+ } else {
+ ret = -ETIME;
+ }
+
+ dev->pg_event = MEI_PG_EVENT_IDLE;
+ hw->pg_state = MEI_PG_ON;
+
+ return ret;
+}
+
+/**
+ * mei_me_pg_unset_sync - perform pg exit procedure
+ *
+ * @dev: the device structure
+ *
+ * returns 0 on success an error code otherwise
+ */
+int mei_me_pg_unset_sync(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ unsigned long timeout = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
+ int ret;
+
+ if (dev->pg_event == MEI_PG_EVENT_RECEIVED)
+ goto reply;
+
+ dev->pg_event = MEI_PG_EVENT_WAIT;
+
+ mei_me_pg_exit(dev);
+
+ mutex_unlock(&dev->device_lock);
+ wait_event_timeout(dev->wait_pg,
+ dev->pg_event == MEI_PG_EVENT_RECEIVED, timeout);
+ mutex_lock(&dev->device_lock);
+
+reply:
+ if (dev->pg_event == MEI_PG_EVENT_RECEIVED)
+ ret = mei_hbm_pg(dev, MEI_PG_ISOLATION_EXIT_RES_CMD);
+ else
+ ret = -ETIME;
+
+ dev->pg_event = MEI_PG_EVENT_IDLE;
+ hw->pg_state = MEI_PG_OFF;
+
+ return ret;
+}
+
+/**
+ * mei_me_pg_is_enabled - detect if PG is supported by HW
+ *
+ * @dev: the device structure
+ *
+ * returns: true is pg supported, false otherwise
+ */
+static bool mei_me_pg_is_enabled(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ u32 reg = mei_me_reg_read(hw, ME_CSR_HA);
+
+ if ((reg & ME_PGIC_HRA) == 0)
+ goto notsupported;
+
+ if (dev->version.major_version < HBM_MAJOR_VERSION_PGI)
+ goto notsupported;
+
+ if (dev->version.major_version == HBM_MAJOR_VERSION_PGI &&
+ dev->version.minor_version < HBM_MINOR_VERSION_PGI)
+ goto notsupported;
+
+ return true;
+
+notsupported:
+ dev_dbg(&dev->pdev->dev, "pg: not supported: HGP = %d hbm version %d.%d ?= %d.%d\n",
+ !!(reg & ME_PGIC_HRA),
+ dev->version.major_version,
+ dev->version.minor_version,
+ HBM_MAJOR_VERSION_PGI,
+ HBM_MINOR_VERSION_PGI);
+
+ return false;
+}
+
+/**
* mei_me_irq_quick_handler - The ISR of the MEI device
*
* @irq: The irq number
@@ -469,7 +638,7 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
struct mei_device *dev = (struct mei_device *) dev_id;
struct mei_cl_cb complete_list;
s32 slots;
- int rets;
+ int rets = 0;
dev_dbg(&dev->pdev->dev, "function called after ISR to handle the interrupt processing.\n");
/* initialize our complete list */
@@ -482,59 +651,123 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
mei_clear_interrupts(dev);
/* check if ME wants a reset */
- if (!mei_hw_is_ready(dev) &&
- dev->dev_state != MEI_DEV_RESETTING &&
- dev->dev_state != MEI_DEV_INITIALIZING &&
- dev->dev_state != MEI_DEV_POWER_DOWN &&
- dev->dev_state != MEI_DEV_POWER_UP) {
- dev_dbg(&dev->pdev->dev, "FW not ready.\n");
- mei_reset(dev, 1);
- mutex_unlock(&dev->device_lock);
- return IRQ_HANDLED;
+ if (!mei_hw_is_ready(dev) && dev->dev_state != MEI_DEV_RESETTING) {
+ dev_warn(&dev->pdev->dev, "FW not ready: resetting.\n");
+ schedule_work(&dev->reset_work);
+ goto end;
}
/* check if we need to start the dev */
if (!mei_host_is_ready(dev)) {
if (mei_hw_is_ready(dev)) {
+ mei_me_hw_reset_release(dev);
dev_dbg(&dev->pdev->dev, "we need to start the dev.\n");
dev->recvd_hw_ready = true;
wake_up_interruptible(&dev->wait_hw_ready);
-
- mutex_unlock(&dev->device_lock);
- return IRQ_HANDLED;
} else {
- dev_dbg(&dev->pdev->dev, "Reset Completed.\n");
- mei_me_hw_reset_release(dev);
- mutex_unlock(&dev->device_lock);
- return IRQ_HANDLED;
+ dev_dbg(&dev->pdev->dev, "Spurious Interrupt\n");
}
+ goto end;
}
/* check slots available for reading */
slots = mei_count_full_read_slots(dev);
while (slots > 0) {
- /* we have urgent data to send so break the read */
- if (dev->wr_ext_msg.hdr.length)
- break;
- dev_dbg(&dev->pdev->dev, "slots =%08x\n", slots);
- dev_dbg(&dev->pdev->dev, "call mei_irq_read_handler.\n");
+ dev_dbg(&dev->pdev->dev, "slots to read = %08x\n", slots);
rets = mei_irq_read_handler(dev, &complete_list, &slots);
- if (rets)
+ /* There is a race between ME write and interrupt delivery:
+ * Not all data is always available immediately after the
+ * interrupt, so try to read again on the next interrupt.
+ */
+ if (rets == -ENODATA)
+ break;
+
+ if (rets && dev->dev_state != MEI_DEV_RESETTING) {
+ dev_err(&dev->pdev->dev, "mei_irq_read_handler ret = %d.\n",
+ rets);
+ schedule_work(&dev->reset_work);
goto end;
+ }
}
- rets = mei_irq_write_handler(dev, &complete_list);
-end:
- dev_dbg(&dev->pdev->dev, "end of bottom half function.\n");
+
dev->hbuf_is_ready = mei_hbuf_is_ready(dev);
- mutex_unlock(&dev->device_lock);
+ /*
+ * During PG handshake only allowed write is the replay to the
+ * PG exit message, so block calling write function
+ * if the pg state is not idle
+ */
+ if (dev->pg_event == MEI_PG_EVENT_IDLE) {
+ rets = mei_irq_write_handler(dev, &complete_list);
+ dev->hbuf_is_ready = mei_hbuf_is_ready(dev);
+ }
mei_irq_compl_handler(dev, &complete_list);
+end:
+ dev_dbg(&dev->pdev->dev, "interrupt thread end ret = %d\n", rets);
+ mutex_unlock(&dev->device_lock);
return IRQ_HANDLED;
}
+
+/**
+ * mei_me_fw_status - retrieve fw status from the pci config space
+ *
+ * @dev: the device structure
+ * @fw_status: fw status registers storage
+ *
+ * returns 0 on success an error code otherwise
+ */
+static int mei_me_fw_status(struct mei_device *dev,
+ struct mei_fw_status *fw_status)
+{
+ const u32 pci_cfg_reg[] = {PCI_CFG_HFS_1, PCI_CFG_HFS_2};
+ int i;
+
+ if (!fw_status)
+ return -EINVAL;
+
+ switch (dev->pdev->device) {
+ case MEI_DEV_ID_IBXPK_1:
+ case MEI_DEV_ID_IBXPK_2:
+ case MEI_DEV_ID_CPT_1:
+ case MEI_DEV_ID_PBG_1:
+ case MEI_DEV_ID_PPT_1:
+ case MEI_DEV_ID_PPT_2:
+ case MEI_DEV_ID_PPT_3:
+ case MEI_DEV_ID_LPT_H:
+ case MEI_DEV_ID_LPT_W:
+ case MEI_DEV_ID_LPT_LP:
+ case MEI_DEV_ID_LPT_HR:
+ case MEI_DEV_ID_WPT_LP:
+ fw_status->count = 2;
+ break;
+ case MEI_DEV_ID_ICH10_1:
+ case MEI_DEV_ID_ICH10_2:
+ case MEI_DEV_ID_ICH10_3:
+ case MEI_DEV_ID_ICH10_4:
+ fw_status->count = 1;
+ break;
+ default:
+ fw_status->count = 0;
+ break;
+ }
+
+ for (i = 0; i < fw_status->count && i < MEI_FW_STATUS_MAX; i++) {
+ int ret;
+ ret = pci_read_config_dword(dev->pdev,
+ pci_cfg_reg[i], &fw_status->status[i]);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
static const struct mei_hw_ops mei_me_hw_ops = {
+ .pg_state = mei_me_pg_state,
+
+ .fw_status = mei_me_fw_status,
.host_is_ready = mei_me_host_is_ready,
.hw_is_ready = mei_me_hw_is_ready,
@@ -542,6 +775,8 @@ static const struct mei_hw_ops mei_me_hw_ops = {
.hw_config = mei_me_hw_config,
.hw_start = mei_me_hw_start,
+ .pg_is_enabled = mei_me_pg_is_enabled,
+
.intr_clear = mei_me_intr_clear,
.intr_enable = mei_me_intr_enable,
.intr_disable = mei_me_intr_disable,
@@ -557,14 +792,81 @@ static const struct mei_hw_ops mei_me_hw_ops = {
.read = mei_me_read_slots
};
+static bool mei_me_fw_type_nm(struct pci_dev *pdev)
+{
+ u32 reg;
+ pci_read_config_dword(pdev, PCI_CFG_HFS_2, &reg);
+ /* make sure that bit 9 (NM) is up and bit 10 (DM) is down */
+ return (reg & 0x600) == 0x200;
+}
+
+#define MEI_CFG_FW_NM \
+ .quirk_probe = mei_me_fw_type_nm
+
+static bool mei_me_fw_type_sps(struct pci_dev *pdev)
+{
+ u32 reg;
+ /* Read ME FW Status check for SPS Firmware */
+ pci_read_config_dword(pdev, PCI_CFG_HFS_1, &reg);
+ /* if bits [19:16] = 15, running SPS Firmware */
+ return (reg & 0xf0000) == 0xf0000;
+}
+
+#define MEI_CFG_FW_SPS \
+ .quirk_probe = mei_me_fw_type_sps
+
+
+#define MEI_CFG_LEGACY_HFS \
+ .fw_status.count = 0
+
+#define MEI_CFG_ICH_HFS \
+ .fw_status.count = 1, \
+ .fw_status.status[0] = PCI_CFG_HFS_1
+
+#define MEI_CFG_PCH_HFS \
+ .fw_status.count = 2, \
+ .fw_status.status[0] = PCI_CFG_HFS_1, \
+ .fw_status.status[1] = PCI_CFG_HFS_2
+
+
+/* ICH Legacy devices */
+const struct mei_cfg mei_me_legacy_cfg = {
+ MEI_CFG_LEGACY_HFS,
+};
+
+/* ICH devices */
+const struct mei_cfg mei_me_ich_cfg = {
+ MEI_CFG_ICH_HFS,
+};
+
+/* PCH devices */
+const struct mei_cfg mei_me_pch_cfg = {
+ MEI_CFG_PCH_HFS,
+};
+
+
+/* PCH Cougar Point and Patsburg with quirk for Node Manager exclusion */
+const struct mei_cfg mei_me_pch_cpt_pbg_cfg = {
+ MEI_CFG_PCH_HFS,
+ MEI_CFG_FW_NM,
+};
+
+/* PCH Lynx Point with quirk for SPS Firmware exclusion */
+const struct mei_cfg mei_me_lpt_cfg = {
+ MEI_CFG_PCH_HFS,
+ MEI_CFG_FW_SPS,
+};
+
/**
* mei_me_dev_init - allocates and initializes the mei device structure
*
* @pdev: The pci device structure
+ * @cfg: per device generation config
*
* returns The mei_device_device pointer on success, NULL on failure.
*/
-struct mei_device *mei_me_dev_init(struct pci_dev *pdev)
+struct mei_device *mei_me_dev_init(struct pci_dev *pdev,
+ const struct mei_cfg *cfg)
{
struct mei_device *dev;
@@ -573,7 +875,7 @@ struct mei_device *mei_me_dev_init(struct pci_dev *pdev)
if (!dev)
return NULL;
- mei_device_init(dev);
+ mei_device_init(dev, cfg);
dev->ops = &mei_me_hw_ops;
diff --git a/drivers/misc/mei/hw-me.h b/drivers/misc/mei/hw-me.h
index 80bd829fbd9..12b0f4bbe1f 100644
--- a/drivers/misc/mei/hw-me.h
+++ b/drivers/misc/mei/hw-me.h
@@ -20,9 +20,12 @@
#define _MEI_INTERFACE_H_
#include <linux/mei.h>
+#include <linux/irqreturn.h>
#include "mei_dev.h"
#include "client.h"
+#define MEI_ME_RPM_TIMEOUT 500 /* ms */
+
struct mei_me_hw {
void __iomem *mem_addr;
/*
@@ -30,11 +33,22 @@ struct mei_me_hw {
*/
u32 host_hw_state;
u32 me_hw_state;
+ enum mei_pg_state pg_state;
};
#define to_me_hw(dev) (struct mei_me_hw *)((dev)->hw)
-struct mei_device *mei_me_dev_init(struct pci_dev *pdev);
+extern const struct mei_cfg mei_me_legacy_cfg;
+extern const struct mei_cfg mei_me_ich_cfg;
+extern const struct mei_cfg mei_me_pch_cfg;
+extern const struct mei_cfg mei_me_pch_cpt_pbg_cfg;
+extern const struct mei_cfg mei_me_lpt_cfg;
+
+struct mei_device *mei_me_dev_init(struct pci_dev *pdev,
+ const struct mei_cfg *cfg);
+
+int mei_me_pg_set_sync(struct mei_device *dev);
+int mei_me_pg_unset_sync(struct mei_device *dev);
irqreturn_t mei_me_irq_quick_handler(int irq, void *dev_id);
irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id);
diff --git a/drivers/misc/mei/hw-txe-regs.h b/drivers/misc/mei/hw-txe-regs.h
new file mode 100644
index 00000000000..f19229c4e65
--- /dev/null
+++ b/drivers/misc/mei/hw-txe-regs.h
@@ -0,0 +1,294 @@
+/******************************************************************************
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ * Intel MEI Interface Header
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called COPYING
+ *
+ * Contact Information:
+ * Intel Corporation.
+ * linux-mei@linux.intel.com
+ * http://www.intel.com
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *****************************************************************************/
+#ifndef _MEI_HW_TXE_REGS_H_
+#define _MEI_HW_TXE_REGS_H_
+
+#include "hw.h"
+
+#define SEC_ALIVENESS_TIMER_TIMEOUT (5 * MSEC_PER_SEC)
+#define SEC_ALIVENESS_WAIT_TIMEOUT (1 * MSEC_PER_SEC)
+#define SEC_RESET_WAIT_TIMEOUT (1 * MSEC_PER_SEC)
+#define SEC_READY_WAIT_TIMEOUT (5 * MSEC_PER_SEC)
+#define START_MESSAGE_RESPONSE_WAIT_TIMEOUT (5 * MSEC_PER_SEC)
+#define RESET_CANCEL_WAIT_TIMEOUT (1 * MSEC_PER_SEC)
+
+enum {
+ SEC_BAR,
+ BRIDGE_BAR,
+
+ NUM_OF_MEM_BARS
+};
+
+/* SeC FW Status Register
+ *
+ * FW uses this register in order to report its status to host.
+ * This register resides in PCI-E config space.
+ */
+#define PCI_CFG_TXE_FW_STS0 0x40
+# define PCI_CFG_TXE_FW_STS0_WRK_ST_MSK 0x0000000F
+# define PCI_CFG_TXE_FW_STS0_OP_ST_MSK 0x000001C0
+# define PCI_CFG_TXE_FW_STS0_FW_INIT_CMPLT 0x00000200
+# define PCI_CFG_TXE_FW_STS0_ERR_CODE_MSK 0x0000F000
+# define PCI_CFG_TXE_FW_STS0_OP_MODE_MSK 0x000F0000
+# define PCI_CFG_TXE_FW_STS0_RST_CNT_MSK 0x00F00000
+#define PCI_CFG_TXE_FW_STS1 0x48
+
+#define IPC_BASE_ADDR 0x80400 /* SeC IPC Base Address */
+
+/* IPC Input Doorbell Register */
+#define SEC_IPC_INPUT_DOORBELL_REG (0x0000 + IPC_BASE_ADDR)
+
+/* IPC Input Status Register
+ * This register indicates whether or not processing of
+ * the most recent command has been completed by the SEC
+ * New commands and payloads should not be written by the Host
+ * until this indicates that the previous command has been processed.
+ */
+#define SEC_IPC_INPUT_STATUS_REG (0x0008 + IPC_BASE_ADDR)
+# define SEC_IPC_INPUT_STATUS_RDY BIT(0)
+
+/* IPC Host Interrupt Status Register */
+#define SEC_IPC_HOST_INT_STATUS_REG (0x0010 + IPC_BASE_ADDR)
+#define SEC_IPC_HOST_INT_STATUS_OUT_DB BIT(0)
+#define SEC_IPC_HOST_INT_STATUS_IN_RDY BIT(1)
+#define SEC_IPC_HOST_INT_STATUS_HDCP_M0_RCVD BIT(5)
+#define SEC_IPC_HOST_INT_STATUS_ILL_MEM_ACCESS BIT(17)
+#define SEC_IPC_HOST_INT_STATUS_AES_HKEY_ERR BIT(18)
+#define SEC_IPC_HOST_INT_STATUS_DES_HKEY_ERR BIT(19)
+#define SEC_IPC_HOST_INT_STATUS_TMRMTB_OVERFLOW BIT(21)
+
+/* Convenient mask for pending interrupts */
+#define SEC_IPC_HOST_INT_STATUS_PENDING \
+ (SEC_IPC_HOST_INT_STATUS_OUT_DB| \
+ SEC_IPC_HOST_INT_STATUS_IN_RDY)
+
+/* IPC Host Interrupt Mask Register */
+#define SEC_IPC_HOST_INT_MASK_REG (0x0014 + IPC_BASE_ADDR)
+
+# define SEC_IPC_HOST_INT_MASK_OUT_DB BIT(0) /* Output Doorbell Int Mask */
+# define SEC_IPC_HOST_INT_MASK_IN_RDY BIT(1) /* Input Ready Int Mask */
+
+/* IPC Input Payload RAM */
+#define SEC_IPC_INPUT_PAYLOAD_REG (0x0100 + IPC_BASE_ADDR)
+/* IPC Shared Payload RAM */
+#define IPC_SHARED_PAYLOAD_REG (0x0200 + IPC_BASE_ADDR)
+
+/* SeC Address Translation Table Entry 2 - Ctrl
+ *
+ * This register resides also in SeC's PCI-E Memory space.
+ */
+#define SATT2_CTRL_REG 0x1040
+# define SATT2_CTRL_VALID_MSK BIT(0)
+# define SATT2_CTRL_BR_BASE_ADDR_REG_SHIFT 8
+# define SATT2_CTRL_BRIDGE_HOST_EN_MSK BIT(12)
+
+/* SATT Table Entry 2 SAP Base Address Register */
+#define SATT2_SAP_BA_REG 0x1044
+/* SATT Table Entry 2 SAP Size Register. */
+#define SATT2_SAP_SIZE_REG 0x1048
+ /* SATT Table Entry 2 SAP Bridge Address - LSB Register */
+#define SATT2_BRG_BA_LSB_REG 0x104C
+
+/* Host High-level Interrupt Status Register */
+#define HHISR_REG 0x2020
+/* Host High-level Interrupt Enable Register
+ *
+ * Resides in PCI memory space. This is the top hierarchy for
+ * interrupts from SeC to host, aggregating both interrupts that
+ * arrive through HICR registers as well as interrupts
+ * that arrive via IPC.
+ */
+#define HHIER_REG 0x2024
+#define IPC_HHIER_SEC BIT(0)
+#define IPC_HHIER_BRIDGE BIT(1)
+#define IPC_HHIER_MSK (IPC_HHIER_SEC | IPC_HHIER_BRIDGE)
+
+/* Host High-level Interrupt Mask Register.
+ *
+ * Resides in PCI memory space.
+ * This is the top hierarchy for masking interrupts from SeC to host.
+ */
+#define HHIMR_REG 0x2028
+#define IPC_HHIMR_SEC BIT(0)
+#define IPC_HHIMR_BRIDGE BIT(1)
+
+/* Host High-level IRQ Status Register */
+#define HHIRQSR_REG 0x202C
+
+/* Host Interrupt Cause Register 0 - SeC IPC Readiness
+ *
+ * This register is both an ICR to Host from PCI Memory Space
+ * and it is also exposed in the SeC memory space.
+ * This register is used by SeC's IPC driver in order
+ * to synchronize with host about IPC interface state.
+ */
+#define HICR_SEC_IPC_READINESS_REG 0x2040
+#define HICR_SEC_IPC_READINESS_HOST_RDY BIT(0)
+#define HICR_SEC_IPC_READINESS_SEC_RDY BIT(1)
+#define HICR_SEC_IPC_READINESS_SYS_RDY \
+ (HICR_SEC_IPC_READINESS_HOST_RDY | \
+ HICR_SEC_IPC_READINESS_SEC_RDY)
+#define HICR_SEC_IPC_READINESS_RDY_CLR BIT(2)
+
+/* Host Interrupt Cause Register 1 - Aliveness Response */
+/* This register is both an ICR to Host from PCI Memory Space
+ * and it is also exposed in the SeC memory space.
+ * The register may be used by SeC to ACK a host request for aliveness.
+ */
+#define HICR_HOST_ALIVENESS_RESP_REG 0x2044
+#define HICR_HOST_ALIVENESS_RESP_ACK BIT(0)
+
+/* Host Interrupt Cause Register 2 - SeC IPC Output Doorbell */
+#define HICR_SEC_IPC_OUTPUT_DOORBELL_REG 0x2048
+
+/* Host Interrupt Status Register.
+ *
+ * Resides in PCI memory space.
+ * This is the main register involved in generating interrupts
+ * from SeC to host via HICRs.
+ * The interrupt generation rules are as follows:
+ * An interrupt will be generated whenever for any i,
+ * there is a transition from a state where at least one of
+ * the following conditions did not hold, to a state where
+ * ALL the following conditions hold:
+ * A) HISR.INT[i]_STS == 1.
+ * B) HIER.INT[i]_EN == 1.
+ */
+#define HISR_REG 0x2060
+#define HISR_INT_0_STS BIT(0)
+#define HISR_INT_1_STS BIT(1)
+#define HISR_INT_2_STS BIT(2)
+#define HISR_INT_3_STS BIT(3)
+#define HISR_INT_4_STS BIT(4)
+#define HISR_INT_5_STS BIT(5)
+#define HISR_INT_6_STS BIT(6)
+#define HISR_INT_7_STS BIT(7)
+#define HISR_INT_STS_MSK \
+ (HISR_INT_0_STS | HISR_INT_1_STS | HISR_INT_2_STS)
+
+/* Host Interrupt Enable Register. Resides in PCI memory space. */
+#define HIER_REG 0x2064
+#define HIER_INT_0_EN BIT(0)
+#define HIER_INT_1_EN BIT(1)
+#define HIER_INT_2_EN BIT(2)
+#define HIER_INT_3_EN BIT(3)
+#define HIER_INT_4_EN BIT(4)
+#define HIER_INT_5_EN BIT(5)
+#define HIER_INT_6_EN BIT(6)
+#define HIER_INT_7_EN BIT(7)
+
+#define HIER_INT_EN_MSK \
+ (HIER_INT_0_EN | HIER_INT_1_EN | HIER_INT_2_EN)
+
+
+/* SEC Memory Space IPC output payload.
+ *
+ * This register is part of the output payload which SEC provides to host.
+ */
+#define BRIDGE_IPC_OUTPUT_PAYLOAD_REG 0x20C0
+
+/* SeC Interrupt Cause Register - Host Aliveness Request
+ * This register is both an ICR to SeC and it is also exposed
+ * in the host-visible PCI memory space.
+ * The register is used by host to request SeC aliveness.
+ */
+#define SICR_HOST_ALIVENESS_REQ_REG 0x214C
+#define SICR_HOST_ALIVENESS_REQ_REQUESTED BIT(0)
+
+
+/* SeC Interrupt Cause Register - Host IPC Readiness
+ *
+ * This register is both an ICR to SeC and it is also exposed
+ * in the host-visible PCI memory space.
+ * This register is used by the host's SeC driver uses in order
+ * to synchronize with SeC about IPC interface state.
+ */
+#define SICR_HOST_IPC_READINESS_REQ_REG 0x2150
+
+
+#define SICR_HOST_IPC_READINESS_HOST_RDY BIT(0)
+#define SICR_HOST_IPC_READINESS_SEC_RDY BIT(1)
+#define SICR_HOST_IPC_READINESS_SYS_RDY \
+ (SICR_HOST_IPC_READINESS_HOST_RDY | \
+ SICR_HOST_IPC_READINESS_SEC_RDY)
+#define SICR_HOST_IPC_READINESS_RDY_CLR BIT(2)
+
+/* SeC Interrupt Cause Register - SeC IPC Output Status
+ *
+ * This register indicates whether or not processing of the most recent
+ * command has been completed by the Host.
+ * New commands and payloads should not be written by SeC until this
+ * register indicates that the previous command has been processed.
+ */
+#define SICR_SEC_IPC_OUTPUT_STATUS_REG 0x2154
+# define SEC_IPC_OUTPUT_STATUS_RDY BIT(0)
+
+
+
+/* MEI IPC Message payload size 64 bytes */
+#define PAYLOAD_SIZE 64
+
+/* MAX size for SATT range 32MB */
+#define SATT_RANGE_MAX (32 << 20)
+
+
+#endif /* _MEI_HW_TXE_REGS_H_ */
+
diff --git a/drivers/misc/mei/hw-txe.c b/drivers/misc/mei/hw-txe.c
new file mode 100644
index 00000000000..93273783dec
--- /dev/null
+++ b/drivers/misc/mei/hw-txe.c
@@ -0,0 +1,1190 @@
+/*
+ *
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ * Copyright (c) 2013-2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#include <linux/pci.h>
+#include <linux/jiffies.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+#include <linux/irqreturn.h>
+
+#include <linux/mei.h>
+
+#include "mei_dev.h"
+#include "hw-txe.h"
+#include "client.h"
+#include "hbm.h"
+
+/**
+ * mei_txe_reg_read - Reads 32bit data from the device
+ *
+ * @base_addr: registers base address
+ * @offset: register offset
+ *
+ */
+static inline u32 mei_txe_reg_read(void __iomem *base_addr,
+ unsigned long offset)
+{
+ return ioread32(base_addr + offset);
+}
+
+/**
+ * mei_txe_reg_write - Writes 32bit data to the device
+ *
+ * @base_addr: registers base address
+ * @offset: register offset
+ * @value: the value to write
+ */
+static inline void mei_txe_reg_write(void __iomem *base_addr,
+ unsigned long offset, u32 value)
+{
+ iowrite32(value, base_addr + offset);
+}
+
+/**
+ * mei_txe_sec_reg_read_silent - Reads 32bit data from the SeC BAR
+ *
+ * @dev: the device structure
+ * @offset: register offset
+ *
+ * Doesn't check for aliveness while Reads 32bit data from the SeC BAR
+ */
+static inline u32 mei_txe_sec_reg_read_silent(struct mei_txe_hw *hw,
+ unsigned long offset)
+{
+ return mei_txe_reg_read(hw->mem_addr[SEC_BAR], offset);
+}
+
+/**
+ * mei_txe_sec_reg_read - Reads 32bit data from the SeC BAR
+ *
+ * @dev: the device structure
+ * @offset: register offset
+ *
+ * Reads 32bit data from the SeC BAR and shout loud if aliveness is not set
+ */
+static inline u32 mei_txe_sec_reg_read(struct mei_txe_hw *hw,
+ unsigned long offset)
+{
+ WARN(!hw->aliveness, "sec read: aliveness not asserted\n");
+ return mei_txe_sec_reg_read_silent(hw, offset);
+}
+/**
+ * mei_txe_sec_reg_write_silent - Writes 32bit data to the SeC BAR
+ * doesn't check for aliveness
+ *
+ * @dev: the device structure
+ * @offset: register offset
+ * @value: value to write
+ *
+ * Doesn't check for aliveness while writes 32bit data from to the SeC BAR
+ */
+static inline void mei_txe_sec_reg_write_silent(struct mei_txe_hw *hw,
+ unsigned long offset, u32 value)
+{
+ mei_txe_reg_write(hw->mem_addr[SEC_BAR], offset, value);
+}
+
+/**
+ * mei_txe_sec_reg_write - Writes 32bit data to the SeC BAR
+ *
+ * @dev: the device structure
+ * @offset: register offset
+ * @value: value to write
+ *
+ * Writes 32bit data from the SeC BAR and shout loud if aliveness is not set
+ */
+static inline void mei_txe_sec_reg_write(struct mei_txe_hw *hw,
+ unsigned long offset, u32 value)
+{
+ WARN(!hw->aliveness, "sec write: aliveness not asserted\n");
+ mei_txe_sec_reg_write_silent(hw, offset, value);
+}
+/**
+ * mei_txe_br_reg_read - Reads 32bit data from the Bridge BAR
+ *
+ * @hw: the device structure
+ * @offset: offset from which to read the data
+ *
+ */
+static inline u32 mei_txe_br_reg_read(struct mei_txe_hw *hw,
+ unsigned long offset)
+{
+ return mei_txe_reg_read(hw->mem_addr[BRIDGE_BAR], offset);
+}
+
+/**
+ * mei_txe_br_reg_write - Writes 32bit data to the Bridge BAR
+ *
+ * @hw: the device structure
+ * @offset: offset from which to write the data
+ * @value: the byte to write
+ */
+static inline void mei_txe_br_reg_write(struct mei_txe_hw *hw,
+ unsigned long offset, u32 value)
+{
+ mei_txe_reg_write(hw->mem_addr[BRIDGE_BAR], offset, value);
+}
+
+/**
+ * mei_txe_aliveness_set - request for aliveness change
+ *
+ * @dev: the device structure
+ * @req: requested aliveness value
+ *
+ * Request for aliveness change and returns true if the change is
+ * really needed and false if aliveness is already
+ * in the requested state
+ * Requires device lock to be held
+ */
+static bool mei_txe_aliveness_set(struct mei_device *dev, u32 req)
+{
+
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ bool do_req = hw->aliveness != req;
+
+ dev_dbg(&dev->pdev->dev, "Aliveness current=%d request=%d\n",
+ hw->aliveness, req);
+ if (do_req) {
+ dev->pg_event = MEI_PG_EVENT_WAIT;
+ mei_txe_br_reg_write(hw, SICR_HOST_ALIVENESS_REQ_REG, req);
+ }
+ return do_req;
+}
+
+
+/**
+ * mei_txe_aliveness_req_get - get aliveness requested register value
+ *
+ * @dev: the device structure
+ *
+ * Extract HICR_HOST_ALIVENESS_RESP_ACK bit from
+ * from HICR_HOST_ALIVENESS_REQ register value
+ */
+static u32 mei_txe_aliveness_req_get(struct mei_device *dev)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ u32 reg;
+ reg = mei_txe_br_reg_read(hw, SICR_HOST_ALIVENESS_REQ_REG);
+ return reg & SICR_HOST_ALIVENESS_REQ_REQUESTED;
+}
+
+/**
+ * mei_txe_aliveness_get - get aliveness response register value
+ * @dev: the device structure
+ *
+ * Extract HICR_HOST_ALIVENESS_RESP_ACK bit
+ * from HICR_HOST_ALIVENESS_RESP register value
+ */
+static u32 mei_txe_aliveness_get(struct mei_device *dev)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ u32 reg;
+ reg = mei_txe_br_reg_read(hw, HICR_HOST_ALIVENESS_RESP_REG);
+ return reg & HICR_HOST_ALIVENESS_RESP_ACK;
+}
+
+/**
+ * mei_txe_aliveness_poll - waits for aliveness to settle
+ *
+ * @dev: the device structure
+ * @expected: expected aliveness value
+ *
+ * Polls for HICR_HOST_ALIVENESS_RESP.ALIVENESS_RESP to be set
+ * returns > 0 if the expected value was received, -ETIME otherwise
+ */
+static int mei_txe_aliveness_poll(struct mei_device *dev, u32 expected)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ int t = 0;
+
+ do {
+ hw->aliveness = mei_txe_aliveness_get(dev);
+ if (hw->aliveness == expected) {
+ dev->pg_event = MEI_PG_EVENT_IDLE;
+ dev_dbg(&dev->pdev->dev,
+ "aliveness settled after %d msecs\n", t);
+ return t;
+ }
+ mutex_unlock(&dev->device_lock);
+ msleep(MSEC_PER_SEC / 5);
+ mutex_lock(&dev->device_lock);
+ t += MSEC_PER_SEC / 5;
+ } while (t < SEC_ALIVENESS_WAIT_TIMEOUT);
+
+ dev->pg_event = MEI_PG_EVENT_IDLE;
+ dev_err(&dev->pdev->dev, "aliveness timed out\n");
+ return -ETIME;
+}
+
+/**
+ * mei_txe_aliveness_wait - waits for aliveness to settle
+ *
+ * @dev: the device structure
+ * @expected: expected aliveness value
+ *
+ * Waits for HICR_HOST_ALIVENESS_RESP.ALIVENESS_RESP to be set
+ * returns returns 0 on success and < 0 otherwise
+ */
+static int mei_txe_aliveness_wait(struct mei_device *dev, u32 expected)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ const unsigned long timeout =
+ msecs_to_jiffies(SEC_ALIVENESS_WAIT_TIMEOUT);
+ long err;
+ int ret;
+
+ hw->aliveness = mei_txe_aliveness_get(dev);
+ if (hw->aliveness == expected)
+ return 0;
+
+ mutex_unlock(&dev->device_lock);
+ err = wait_event_timeout(hw->wait_aliveness_resp,
+ dev->pg_event == MEI_PG_EVENT_RECEIVED, timeout);
+ mutex_lock(&dev->device_lock);
+
+ hw->aliveness = mei_txe_aliveness_get(dev);
+ ret = hw->aliveness == expected ? 0 : -ETIME;
+
+ if (ret)
+ dev_warn(&dev->pdev->dev, "aliveness timed out = %ld aliveness = %d event = %d\n",
+ err, hw->aliveness, dev->pg_event);
+ else
+ dev_dbg(&dev->pdev->dev, "aliveness settled after = %d msec aliveness = %d event = %d\n",
+ jiffies_to_msecs(timeout - err),
+ hw->aliveness, dev->pg_event);
+
+ dev->pg_event = MEI_PG_EVENT_IDLE;
+ return ret;
+}
+
+/**
+ * mei_txe_aliveness_set_sync - sets an wait for aliveness to complete
+ *
+ * @dev: the device structure
+ *
+ * returns returns 0 on success and < 0 otherwise
+ */
+int mei_txe_aliveness_set_sync(struct mei_device *dev, u32 req)
+{
+ if (mei_txe_aliveness_set(dev, req))
+ return mei_txe_aliveness_wait(dev, req);
+ return 0;
+}
+
+/**
+ * mei_txe_pg_is_enabled - detect if PG is supported by HW
+ *
+ * @dev: the device structure
+ *
+ * returns: true is pg supported, false otherwise
+ */
+static bool mei_txe_pg_is_enabled(struct mei_device *dev)
+{
+ return true;
+}
+
+/**
+ * mei_txe_pg_state - translate aliveness register value
+ * to the mei power gating state
+ *
+ * @dev: the device structure
+ *
+ * returns: MEI_PG_OFF if aliveness is on and MEI_PG_ON otherwise
+ */
+static inline enum mei_pg_state mei_txe_pg_state(struct mei_device *dev)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ return hw->aliveness ? MEI_PG_OFF : MEI_PG_ON;
+}
+
+/**
+ * mei_txe_input_ready_interrupt_enable - sets the Input Ready Interrupt
+ *
+ * @dev: the device structure
+ */
+static void mei_txe_input_ready_interrupt_enable(struct mei_device *dev)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ u32 hintmsk;
+ /* Enable the SEC_IPC_HOST_INT_MASK_IN_RDY interrupt */
+ hintmsk = mei_txe_sec_reg_read(hw, SEC_IPC_HOST_INT_MASK_REG);
+ hintmsk |= SEC_IPC_HOST_INT_MASK_IN_RDY;
+ mei_txe_sec_reg_write(hw, SEC_IPC_HOST_INT_MASK_REG, hintmsk);
+}
+
+/**
+ * mei_txe_input_doorbell_set
+ * - Sets bit 0 in SEC_IPC_INPUT_DOORBELL.IPC_INPUT_DOORBELL.
+ * @dev: the device structure
+ */
+static void mei_txe_input_doorbell_set(struct mei_txe_hw *hw)
+{
+ /* Clear the interrupt cause */
+ clear_bit(TXE_INTR_IN_READY_BIT, &hw->intr_cause);
+ mei_txe_sec_reg_write(hw, SEC_IPC_INPUT_DOORBELL_REG, 1);
+}
+
+/**
+ * mei_txe_output_ready_set - Sets the SICR_SEC_IPC_OUTPUT_STATUS bit to 1
+ *
+ * @dev: the device structure
+ */
+static void mei_txe_output_ready_set(struct mei_txe_hw *hw)
+{
+ mei_txe_br_reg_write(hw,
+ SICR_SEC_IPC_OUTPUT_STATUS_REG,
+ SEC_IPC_OUTPUT_STATUS_RDY);
+}
+
+/**
+ * mei_txe_is_input_ready - check if TXE is ready for receiving data
+ *
+ * @dev: the device structure
+ */
+static bool mei_txe_is_input_ready(struct mei_device *dev)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ u32 status;
+ status = mei_txe_sec_reg_read(hw, SEC_IPC_INPUT_STATUS_REG);
+ return !!(SEC_IPC_INPUT_STATUS_RDY & status);
+}
+
+/**
+ * mei_txe_intr_clear - clear all interrupts
+ *
+ * @dev: the device structure
+ */
+static inline void mei_txe_intr_clear(struct mei_device *dev)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ mei_txe_sec_reg_write_silent(hw, SEC_IPC_HOST_INT_STATUS_REG,
+ SEC_IPC_HOST_INT_STATUS_PENDING);
+ mei_txe_br_reg_write(hw, HISR_REG, HISR_INT_STS_MSK);
+ mei_txe_br_reg_write(hw, HHISR_REG, IPC_HHIER_MSK);
+}
+
+/**
+ * mei_txe_intr_disable - disable all interrupts
+ *
+ * @dev: the device structure
+ */
+static void mei_txe_intr_disable(struct mei_device *dev)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ mei_txe_br_reg_write(hw, HHIER_REG, 0);
+ mei_txe_br_reg_write(hw, HIER_REG, 0);
+}
+/**
+ * mei_txe_intr_disable - enable all interrupts
+ *
+ * @dev: the device structure
+ */
+static void mei_txe_intr_enable(struct mei_device *dev)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ mei_txe_br_reg_write(hw, HHIER_REG, IPC_HHIER_MSK);
+ mei_txe_br_reg_write(hw, HIER_REG, HIER_INT_EN_MSK);
+}
+
+/**
+ * mei_txe_pending_interrupts - check if there are pending interrupts
+ * only Aliveness, Input ready, and output doorbell are of relevance
+ *
+ * @dev: the device structure
+ *
+ * Checks if there are pending interrupts
+ * only Aliveness, Readiness, Input ready, and Output doorbell are relevant
+ */
+static bool mei_txe_pending_interrupts(struct mei_device *dev)
+{
+
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ bool ret = (hw->intr_cause & (TXE_INTR_READINESS |
+ TXE_INTR_ALIVENESS |
+ TXE_INTR_IN_READY |
+ TXE_INTR_OUT_DB));
+
+ if (ret) {
+ dev_dbg(&dev->pdev->dev,
+ "Pending Interrupts InReady=%01d Readiness=%01d, Aliveness=%01d, OutDoor=%01d\n",
+ !!(hw->intr_cause & TXE_INTR_IN_READY),
+ !!(hw->intr_cause & TXE_INTR_READINESS),
+ !!(hw->intr_cause & TXE_INTR_ALIVENESS),
+ !!(hw->intr_cause & TXE_INTR_OUT_DB));
+ }
+ return ret;
+}
+
+/**
+ * mei_txe_input_payload_write - write a dword to the host buffer
+ * at offset idx
+ *
+ * @dev: the device structure
+ * @idx: index in the host buffer
+ * @value: value
+ */
+static void mei_txe_input_payload_write(struct mei_device *dev,
+ unsigned long idx, u32 value)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ mei_txe_sec_reg_write(hw, SEC_IPC_INPUT_PAYLOAD_REG +
+ (idx * sizeof(u32)), value);
+}
+
+/**
+ * mei_txe_out_data_read - read dword from the device buffer
+ * at offset idx
+ *
+ * @dev: the device structure
+ * @idx: index in the device buffer
+ *
+ * returns register value at index
+ */
+static u32 mei_txe_out_data_read(const struct mei_device *dev,
+ unsigned long idx)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ return mei_txe_br_reg_read(hw,
+ BRIDGE_IPC_OUTPUT_PAYLOAD_REG + (idx * sizeof(u32)));
+}
+
+/* Readiness */
+
+/**
+ * mei_txe_readiness_set_host_rdy
+ *
+ * @dev: the device structure
+ */
+static void mei_txe_readiness_set_host_rdy(struct mei_device *dev)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ mei_txe_br_reg_write(hw,
+ SICR_HOST_IPC_READINESS_REQ_REG,
+ SICR_HOST_IPC_READINESS_HOST_RDY);
+}
+
+/**
+ * mei_txe_readiness_clear
+ *
+ * @dev: the device structure
+ */
+static void mei_txe_readiness_clear(struct mei_device *dev)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ mei_txe_br_reg_write(hw, SICR_HOST_IPC_READINESS_REQ_REG,
+ SICR_HOST_IPC_READINESS_RDY_CLR);
+}
+/**
+ * mei_txe_readiness_get - Reads and returns
+ * the HICR_SEC_IPC_READINESS register value
+ *
+ * @dev: the device structure
+ */
+static u32 mei_txe_readiness_get(struct mei_device *dev)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ return mei_txe_br_reg_read(hw, HICR_SEC_IPC_READINESS_REG);
+}
+
+
+/**
+ * mei_txe_readiness_is_sec_rdy - check readiness
+ * for HICR_SEC_IPC_READINESS_SEC_RDY
+ *
+ * @readiness - cached readiness state
+ */
+static inline bool mei_txe_readiness_is_sec_rdy(u32 readiness)
+{
+ return !!(readiness & HICR_SEC_IPC_READINESS_SEC_RDY);
+}
+
+/**
+ * mei_txe_hw_is_ready - check if the hw is ready
+ *
+ * @dev: the device structure
+ */
+static bool mei_txe_hw_is_ready(struct mei_device *dev)
+{
+ u32 readiness = mei_txe_readiness_get(dev);
+ return mei_txe_readiness_is_sec_rdy(readiness);
+}
+
+/**
+ * mei_txe_host_is_ready - check if the host is ready
+ *
+ * @dev: the device structure
+ */
+static inline bool mei_txe_host_is_ready(struct mei_device *dev)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ u32 reg = mei_txe_br_reg_read(hw, HICR_SEC_IPC_READINESS_REG);
+ return !!(reg & HICR_SEC_IPC_READINESS_HOST_RDY);
+}
+
+/**
+ * mei_txe_readiness_wait - wait till readiness settles
+ *
+ * @dev: the device structure
+ *
+ * returns 0 on success and -ETIME on timeout
+ */
+static int mei_txe_readiness_wait(struct mei_device *dev)
+{
+ if (mei_txe_hw_is_ready(dev))
+ return 0;
+
+ mutex_unlock(&dev->device_lock);
+ wait_event_timeout(dev->wait_hw_ready, dev->recvd_hw_ready,
+ msecs_to_jiffies(SEC_RESET_WAIT_TIMEOUT));
+ mutex_lock(&dev->device_lock);
+ if (!dev->recvd_hw_ready) {
+ dev_err(&dev->pdev->dev, "wait for readiness failed\n");
+ return -ETIME;
+ }
+
+ dev->recvd_hw_ready = false;
+ return 0;
+}
+
+/**
+ * mei_txe_hw_config - configure hardware at the start of the devices
+ *
+ * @dev: the device structure
+ *
+ * Configure hardware at the start of the device should be done only
+ * once at the device probe time
+ */
+static void mei_txe_hw_config(struct mei_device *dev)
+{
+
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ /* Doesn't change in runtime */
+ dev->hbuf_depth = PAYLOAD_SIZE / 4;
+
+ hw->aliveness = mei_txe_aliveness_get(dev);
+ hw->readiness = mei_txe_readiness_get(dev);
+
+ dev_dbg(&dev->pdev->dev, "aliveness_resp = 0x%08x, readiness = 0x%08x.\n",
+ hw->aliveness, hw->readiness);
+}
+
+
+/**
+ * mei_txe_write - writes a message to device.
+ *
+ * @dev: the device structure
+ * @header: header of message
+ * @buf: message buffer will be written
+ * returns 1 if success, 0 - otherwise.
+ */
+
+static int mei_txe_write(struct mei_device *dev,
+ struct mei_msg_hdr *header, unsigned char *buf)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ unsigned long rem;
+ unsigned long length;
+ int slots = dev->hbuf_depth;
+ u32 *reg_buf = (u32 *)buf;
+ u32 dw_cnt;
+ int i;
+
+ if (WARN_ON(!header || !buf))
+ return -EINVAL;
+
+ length = header->length;
+
+ dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(header));
+
+ dw_cnt = mei_data2slots(length);
+ if (dw_cnt > slots)
+ return -EMSGSIZE;
+
+ if (WARN(!hw->aliveness, "txe write: aliveness not asserted\n"))
+ return -EAGAIN;
+
+ /* Enable Input Ready Interrupt. */
+ mei_txe_input_ready_interrupt_enable(dev);
+
+ if (!mei_txe_is_input_ready(dev)) {
+ struct mei_fw_status fw_status;
+ mei_fw_status(dev, &fw_status);
+ dev_err(&dev->pdev->dev, "Input is not ready " FW_STS_FMT "\n",
+ FW_STS_PRM(fw_status));
+ return -EAGAIN;
+ }
+
+ mei_txe_input_payload_write(dev, 0, *((u32 *)header));
+
+ for (i = 0; i < length / 4; i++)
+ mei_txe_input_payload_write(dev, i + 1, reg_buf[i]);
+
+ rem = length & 0x3;
+ if (rem > 0) {
+ u32 reg = 0;
+ memcpy(&reg, &buf[length - rem], rem);
+ mei_txe_input_payload_write(dev, i + 1, reg);
+ }
+
+ /* after each write the whole buffer is consumed */
+ hw->slots = 0;
+
+ /* Set Input-Doorbell */
+ mei_txe_input_doorbell_set(hw);
+
+ return 0;
+}
+
+/**
+ * mei_txe_hbuf_max_len - mimics the me hbuf circular buffer
+ *
+ * @dev: the device structure
+ *
+ * returns the PAYLOAD_SIZE - 4
+ */
+static size_t mei_txe_hbuf_max_len(const struct mei_device *dev)
+{
+ return PAYLOAD_SIZE - sizeof(struct mei_msg_hdr);
+}
+
+/**
+ * mei_txe_hbuf_empty_slots - mimics the me hbuf circular buffer
+ *
+ * @dev: the device structure
+ *
+ * returns always hbuf_depth
+ */
+static int mei_txe_hbuf_empty_slots(struct mei_device *dev)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ return hw->slots;
+}
+
+/**
+ * mei_txe_count_full_read_slots - mimics the me device circular buffer
+ *
+ * @dev: the device structure
+ *
+ * returns always buffer size in dwords count
+ */
+static int mei_txe_count_full_read_slots(struct mei_device *dev)
+{
+ /* read buffers has static size */
+ return PAYLOAD_SIZE / 4;
+}
+
+/**
+ * mei_txe_read_hdr - read message header which is always in 4 first bytes
+ *
+ * @dev: the device structure
+ *
+ * returns mei message header
+ */
+
+static u32 mei_txe_read_hdr(const struct mei_device *dev)
+{
+ return mei_txe_out_data_read(dev, 0);
+}
+/**
+ * mei_txe_read - reads a message from the txe device.
+ *
+ * @dev: the device structure
+ * @buf: message buffer will be written
+ * @len: message size will be read
+ *
+ * returns -EINVAL on error wrong argument and 0 on success
+ */
+static int mei_txe_read(struct mei_device *dev,
+ unsigned char *buf, unsigned long len)
+{
+
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ u32 i;
+ u32 *reg_buf = (u32 *)buf;
+ u32 rem = len & 0x3;
+
+ if (WARN_ON(!buf || !len))
+ return -EINVAL;
+
+ dev_dbg(&dev->pdev->dev,
+ "buffer-length = %lu buf[0]0x%08X\n",
+ len, mei_txe_out_data_read(dev, 0));
+
+ for (i = 0; i < len / 4; i++) {
+ /* skip header: index starts from 1 */
+ u32 reg = mei_txe_out_data_read(dev, i + 1);
+ dev_dbg(&dev->pdev->dev, "buf[%d] = 0x%08X\n", i, reg);
+ *reg_buf++ = reg;
+ }
+
+ if (rem) {
+ u32 reg = mei_txe_out_data_read(dev, i + 1);
+ memcpy(reg_buf, &reg, rem);
+ }
+
+ mei_txe_output_ready_set(hw);
+ return 0;
+}
+
+/**
+ * mei_txe_hw_reset - resets host and fw.
+ *
+ * @dev: the device structure
+ * @intr_enable: if interrupt should be enabled after reset.
+ *
+ * returns 0 on success and < 0 in case of error
+ */
+static int mei_txe_hw_reset(struct mei_device *dev, bool intr_enable)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+
+ u32 aliveness_req;
+ /*
+ * read input doorbell to ensure consistency between Bridge and SeC
+ * return value might be garbage return
+ */
+ (void)mei_txe_sec_reg_read_silent(hw, SEC_IPC_INPUT_DOORBELL_REG);
+
+ aliveness_req = mei_txe_aliveness_req_get(dev);
+ hw->aliveness = mei_txe_aliveness_get(dev);
+
+ /* Disable interrupts in this stage we will poll */
+ mei_txe_intr_disable(dev);
+
+ /*
+ * If Aliveness Request and Aliveness Response are not equal then
+ * wait for them to be equal
+ * Since we might have interrupts disabled - poll for it
+ */
+ if (aliveness_req != hw->aliveness)
+ if (mei_txe_aliveness_poll(dev, aliveness_req) < 0) {
+ dev_err(&dev->pdev->dev,
+ "wait for aliveness settle failed ... bailing out\n");
+ return -EIO;
+ }
+
+ /*
+ * If Aliveness Request and Aliveness Response are set then clear them
+ */
+ if (aliveness_req) {
+ mei_txe_aliveness_set(dev, 0);
+ if (mei_txe_aliveness_poll(dev, 0) < 0) {
+ dev_err(&dev->pdev->dev,
+ "wait for aliveness failed ... bailing out\n");
+ return -EIO;
+ }
+ }
+
+ /*
+ * Set rediness RDY_CLR bit
+ */
+ mei_txe_readiness_clear(dev);
+
+ return 0;
+}
+
+/**
+ * mei_txe_hw_start - start the hardware after reset
+ *
+ * @dev: the device structure
+ *
+ * returns 0 on success and < 0 in case of error
+ */
+static int mei_txe_hw_start(struct mei_device *dev)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ int ret;
+
+ u32 hisr;
+
+ /* bring back interrupts */
+ mei_txe_intr_enable(dev);
+
+ ret = mei_txe_readiness_wait(dev);
+ if (ret < 0) {
+ dev_err(&dev->pdev->dev, "wating for readiness failed\n");
+ return ret;
+ }
+
+ /*
+ * If HISR.INT2_STS interrupt status bit is set then clear it.
+ */
+ hisr = mei_txe_br_reg_read(hw, HISR_REG);
+ if (hisr & HISR_INT_2_STS)
+ mei_txe_br_reg_write(hw, HISR_REG, HISR_INT_2_STS);
+
+ /* Clear the interrupt cause of OutputDoorbell */
+ clear_bit(TXE_INTR_OUT_DB_BIT, &hw->intr_cause);
+
+ ret = mei_txe_aliveness_set_sync(dev, 1);
+ if (ret < 0) {
+ dev_err(&dev->pdev->dev, "wait for aliveness failed ... bailing out\n");
+ return ret;
+ }
+
+ /* enable input ready interrupts:
+ * SEC_IPC_HOST_INT_MASK.IPC_INPUT_READY_INT_MASK
+ */
+ mei_txe_input_ready_interrupt_enable(dev);
+
+
+ /* Set the SICR_SEC_IPC_OUTPUT_STATUS.IPC_OUTPUT_READY bit */
+ mei_txe_output_ready_set(hw);
+
+ /* Set bit SICR_HOST_IPC_READINESS.HOST_RDY
+ */
+ mei_txe_readiness_set_host_rdy(dev);
+
+ return 0;
+}
+
+/**
+ * mei_txe_check_and_ack_intrs - translate multi BAR interrupt into
+ * single bit mask and acknowledge the interrupts
+ *
+ * @dev: the device structure
+ * @do_ack: acknowledge interrupts
+ */
+static bool mei_txe_check_and_ack_intrs(struct mei_device *dev, bool do_ack)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ u32 hisr;
+ u32 hhisr;
+ u32 ipc_isr;
+ u32 aliveness;
+ bool generated;
+
+ /* read interrupt registers */
+ hhisr = mei_txe_br_reg_read(hw, HHISR_REG);
+ generated = (hhisr & IPC_HHIER_MSK);
+ if (!generated)
+ goto out;
+
+ hisr = mei_txe_br_reg_read(hw, HISR_REG);
+
+ aliveness = mei_txe_aliveness_get(dev);
+ if (hhisr & IPC_HHIER_SEC && aliveness)
+ ipc_isr = mei_txe_sec_reg_read_silent(hw,
+ SEC_IPC_HOST_INT_STATUS_REG);
+ else
+ ipc_isr = 0;
+
+ generated = generated ||
+ (hisr & HISR_INT_STS_MSK) ||
+ (ipc_isr & SEC_IPC_HOST_INT_STATUS_PENDING);
+
+ if (generated && do_ack) {
+ /* Save the interrupt causes */
+ hw->intr_cause |= hisr & HISR_INT_STS_MSK;
+ if (ipc_isr & SEC_IPC_HOST_INT_STATUS_IN_RDY)
+ hw->intr_cause |= TXE_INTR_IN_READY;
+
+
+ mei_txe_intr_disable(dev);
+ /* Clear the interrupts in hierarchy:
+ * IPC and Bridge, than the High Level */
+ mei_txe_sec_reg_write_silent(hw,
+ SEC_IPC_HOST_INT_STATUS_REG, ipc_isr);
+ mei_txe_br_reg_write(hw, HISR_REG, hisr);
+ mei_txe_br_reg_write(hw, HHISR_REG, hhisr);
+ }
+
+out:
+ return generated;
+}
+
+/**
+ * mei_txe_irq_quick_handler - The ISR of the MEI device
+ *
+ * @irq: The irq number
+ * @dev_id: pointer to the device structure
+ *
+ * returns irqreturn_t
+ */
+irqreturn_t mei_txe_irq_quick_handler(int irq, void *dev_id)
+{
+ struct mei_device *dev = dev_id;
+
+ if (mei_txe_check_and_ack_intrs(dev, true))
+ return IRQ_WAKE_THREAD;
+ return IRQ_NONE;
+}
+
+
+/**
+ * mei_txe_irq_thread_handler - txe interrupt thread
+ *
+ * @irq: The irq number
+ * @dev_id: pointer to the device structure
+ *
+ * returns irqreturn_t
+ *
+ */
+irqreturn_t mei_txe_irq_thread_handler(int irq, void *dev_id)
+{
+ struct mei_device *dev = (struct mei_device *) dev_id;
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ struct mei_cl_cb complete_list;
+ s32 slots;
+ int rets = 0;
+
+ dev_dbg(&dev->pdev->dev, "irq thread: Interrupt Registers HHISR|HISR|SEC=%02X|%04X|%02X\n",
+ mei_txe_br_reg_read(hw, HHISR_REG),
+ mei_txe_br_reg_read(hw, HISR_REG),
+ mei_txe_sec_reg_read_silent(hw, SEC_IPC_HOST_INT_STATUS_REG));
+
+
+ /* initialize our complete list */
+ mutex_lock(&dev->device_lock);
+ mei_io_list_init(&complete_list);
+
+ if (pci_dev_msi_enabled(dev->pdev))
+ mei_txe_check_and_ack_intrs(dev, true);
+
+ /* show irq events */
+ mei_txe_pending_interrupts(dev);
+
+ hw->aliveness = mei_txe_aliveness_get(dev);
+ hw->readiness = mei_txe_readiness_get(dev);
+
+ /* Readiness:
+ * Detection of TXE driver going through reset
+ * or TXE driver resetting the HECI interface.
+ */
+ if (test_and_clear_bit(TXE_INTR_READINESS_BIT, &hw->intr_cause)) {
+ dev_dbg(&dev->pdev->dev, "Readiness Interrupt was received...\n");
+
+ /* Check if SeC is going through reset */
+ if (mei_txe_readiness_is_sec_rdy(hw->readiness)) {
+ dev_dbg(&dev->pdev->dev, "we need to start the dev.\n");
+ dev->recvd_hw_ready = true;
+ } else {
+ dev->recvd_hw_ready = false;
+ if (dev->dev_state != MEI_DEV_RESETTING) {
+
+ dev_warn(&dev->pdev->dev, "FW not ready: resetting.\n");
+ schedule_work(&dev->reset_work);
+ goto end;
+
+ }
+ }
+ wake_up(&dev->wait_hw_ready);
+ }
+
+ /************************************************************/
+ /* Check interrupt cause:
+ * Aliveness: Detection of SeC acknowledge of host request that
+ * it remain alive or host cancellation of that request.
+ */
+
+ if (test_and_clear_bit(TXE_INTR_ALIVENESS_BIT, &hw->intr_cause)) {
+ /* Clear the interrupt cause */
+ dev_dbg(&dev->pdev->dev,
+ "Aliveness Interrupt: Status: %d\n", hw->aliveness);
+ dev->pg_event = MEI_PG_EVENT_RECEIVED;
+ if (waitqueue_active(&hw->wait_aliveness_resp))
+ wake_up(&hw->wait_aliveness_resp);
+ }
+
+
+ /* Output Doorbell:
+ * Detection of SeC having sent output to host
+ */
+ slots = mei_count_full_read_slots(dev);
+ if (test_and_clear_bit(TXE_INTR_OUT_DB_BIT, &hw->intr_cause)) {
+ /* Read from TXE */
+ rets = mei_irq_read_handler(dev, &complete_list, &slots);
+ if (rets && dev->dev_state != MEI_DEV_RESETTING) {
+ dev_err(&dev->pdev->dev,
+ "mei_irq_read_handler ret = %d.\n", rets);
+
+ schedule_work(&dev->reset_work);
+ goto end;
+ }
+ }
+ /* Input Ready: Detection if host can write to SeC */
+ if (test_and_clear_bit(TXE_INTR_IN_READY_BIT, &hw->intr_cause)) {
+ dev->hbuf_is_ready = true;
+ hw->slots = dev->hbuf_depth;
+ }
+
+ if (hw->aliveness && dev->hbuf_is_ready) {
+ /* get the real register value */
+ dev->hbuf_is_ready = mei_hbuf_is_ready(dev);
+ rets = mei_irq_write_handler(dev, &complete_list);
+ if (rets && rets != -EMSGSIZE)
+ dev_err(&dev->pdev->dev, "mei_irq_write_handler ret = %d.\n",
+ rets);
+ dev->hbuf_is_ready = mei_hbuf_is_ready(dev);
+ }
+
+ mei_irq_compl_handler(dev, &complete_list);
+
+end:
+ dev_dbg(&dev->pdev->dev, "interrupt thread end ret = %d\n", rets);
+
+ mutex_unlock(&dev->device_lock);
+
+ mei_enable_interrupts(dev);
+ return IRQ_HANDLED;
+}
+
+
+/**
+ * mei_txe_fw_status - retrieve fw status from the pci config space
+ *
+ * @dev: the device structure
+ * @fw_status: fw status registers storage
+ *
+ * returns: 0 on success an error code otherwise
+ */
+static int mei_txe_fw_status(struct mei_device *dev,
+ struct mei_fw_status *fw_status)
+{
+ const u32 pci_cfg_reg[] = {PCI_CFG_TXE_FW_STS0, PCI_CFG_TXE_FW_STS1};
+ int i;
+
+ if (!fw_status)
+ return -EINVAL;
+
+ fw_status->count = 2;
+
+ for (i = 0; i < fw_status->count && i < MEI_FW_STATUS_MAX; i++) {
+ int ret;
+ ret = pci_read_config_dword(dev->pdev,
+ pci_cfg_reg[i], &fw_status->status[i]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct mei_hw_ops mei_txe_hw_ops = {
+
+ .fw_status = mei_txe_fw_status,
+ .host_is_ready = mei_txe_host_is_ready,
+
+ .pg_state = mei_txe_pg_state,
+
+ .hw_is_ready = mei_txe_hw_is_ready,
+ .hw_reset = mei_txe_hw_reset,
+ .hw_config = mei_txe_hw_config,
+ .hw_start = mei_txe_hw_start,
+
+ .pg_is_enabled = mei_txe_pg_is_enabled,
+
+ .intr_clear = mei_txe_intr_clear,
+ .intr_enable = mei_txe_intr_enable,
+ .intr_disable = mei_txe_intr_disable,
+
+ .hbuf_free_slots = mei_txe_hbuf_empty_slots,
+ .hbuf_is_ready = mei_txe_is_input_ready,
+ .hbuf_max_len = mei_txe_hbuf_max_len,
+
+ .write = mei_txe_write,
+
+ .rdbuf_full_slots = mei_txe_count_full_read_slots,
+ .read_hdr = mei_txe_read_hdr,
+
+ .read = mei_txe_read,
+
+};
+
+#define MEI_CFG_TXE_FW_STS \
+ .fw_status.count = 2, \
+ .fw_status.status[0] = PCI_CFG_TXE_FW_STS0, \
+ .fw_status.status[1] = PCI_CFG_TXE_FW_STS1
+
+const struct mei_cfg mei_txe_cfg = {
+ MEI_CFG_TXE_FW_STS,
+};
+
+
+/**
+ * mei_txe_dev_init - allocates and initializes txe hardware specific structure
+ *
+ * @pdev - pci device
+ * @cfg - per device generation config
+ *
+ * returns struct mei_device * on success or NULL;
+ *
+ */
+struct mei_device *mei_txe_dev_init(struct pci_dev *pdev,
+ const struct mei_cfg *cfg)
+{
+ struct mei_device *dev;
+ struct mei_txe_hw *hw;
+
+ dev = kzalloc(sizeof(struct mei_device) +
+ sizeof(struct mei_txe_hw), GFP_KERNEL);
+ if (!dev)
+ return NULL;
+
+ mei_device_init(dev, cfg);
+
+ hw = to_txe_hw(dev);
+
+ init_waitqueue_head(&hw->wait_aliveness_resp);
+
+ dev->ops = &mei_txe_hw_ops;
+
+ dev->pdev = pdev;
+ return dev;
+}
+
+/**
+ * mei_txe_setup_satt2 - SATT2 configuration for DMA support.
+ *
+ * @dev: the device structure
+ * @addr: physical address start of the range
+ * @range: physical range size
+ */
+int mei_txe_setup_satt2(struct mei_device *dev, phys_addr_t addr, u32 range)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+
+ u32 lo32 = lower_32_bits(addr);
+ u32 hi32 = upper_32_bits(addr);
+ u32 ctrl;
+
+ /* SATT is limited to 36 Bits */
+ if (hi32 & ~0xF)
+ return -EINVAL;
+
+ /* SATT has to be 16Byte aligned */
+ if (lo32 & 0xF)
+ return -EINVAL;
+
+ /* SATT range has to be 4Bytes aligned */
+ if (range & 0x4)
+ return -EINVAL;
+
+ /* SATT is limited to 32 MB range*/
+ if (range > SATT_RANGE_MAX)
+ return -EINVAL;
+
+ ctrl = SATT2_CTRL_VALID_MSK;
+ ctrl |= hi32 << SATT2_CTRL_BR_BASE_ADDR_REG_SHIFT;
+
+ mei_txe_br_reg_write(hw, SATT2_SAP_SIZE_REG, range);
+ mei_txe_br_reg_write(hw, SATT2_BRG_BA_LSB_REG, lo32);
+ mei_txe_br_reg_write(hw, SATT2_CTRL_REG, ctrl);
+ dev_dbg(&dev->pdev->dev, "SATT2: SAP_SIZE_OFFSET=0x%08X, BRG_BA_LSB_OFFSET=0x%08X, CTRL_OFFSET=0x%08X\n",
+ range, lo32, ctrl);
+
+ return 0;
+}
diff --git a/drivers/misc/mei/hw-txe.h b/drivers/misc/mei/hw-txe.h
new file mode 100644
index 00000000000..e244af79167
--- /dev/null
+++ b/drivers/misc/mei/hw-txe.h
@@ -0,0 +1,77 @@
+/*
+ *
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ * Copyright (c) 2013-2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#ifndef _MEI_HW_TXE_H_
+#define _MEI_HW_TXE_H_
+
+#include <linux/irqreturn.h>
+
+#include "hw.h"
+#include "hw-txe-regs.h"
+
+#define MEI_TXI_RPM_TIMEOUT 500 /* ms */
+
+/* Flatten Hierarchy interrupt cause */
+#define TXE_INTR_READINESS_BIT 0 /* HISR_INT_0_STS */
+#define TXE_INTR_READINESS HISR_INT_0_STS
+#define TXE_INTR_ALIVENESS_BIT 1 /* HISR_INT_1_STS */
+#define TXE_INTR_ALIVENESS HISR_INT_1_STS
+#define TXE_INTR_OUT_DB_BIT 2 /* HISR_INT_2_STS */
+#define TXE_INTR_OUT_DB HISR_INT_2_STS
+#define TXE_INTR_IN_READY_BIT 8 /* beyond HISR */
+#define TXE_INTR_IN_READY BIT(8)
+
+/**
+ * struct mei_txe_hw - txe hardware specifics
+ *
+ * @mem_addr: SeC and BRIDGE bars
+ * @aliveness: aliveness (power gating) state of the hardware
+ * @readiness: readiness state of the hardware
+ * @wait_aliveness_resp: aliveness wait queue
+ * @intr_cause: translated interrupt cause
+ */
+struct mei_txe_hw {
+ void __iomem *mem_addr[NUM_OF_MEM_BARS];
+ u32 aliveness;
+ u32 readiness;
+ u32 slots;
+
+ wait_queue_head_t wait_aliveness_resp;
+
+ unsigned long intr_cause;
+};
+
+#define to_txe_hw(dev) (struct mei_txe_hw *)((dev)->hw)
+
+static inline struct mei_device *hw_txe_to_mei(struct mei_txe_hw *hw)
+{
+ return container_of((void *)hw, struct mei_device, hw);
+}
+
+extern const struct mei_cfg mei_txe_cfg;
+
+struct mei_device *mei_txe_dev_init(struct pci_dev *pdev,
+ const struct mei_cfg *cfg);
+
+irqreturn_t mei_txe_irq_quick_handler(int irq, void *dev_id);
+irqreturn_t mei_txe_irq_thread_handler(int irq, void *dev_id);
+
+int mei_txe_aliveness_set_sync(struct mei_device *dev, u32 req);
+
+int mei_txe_setup_satt2(struct mei_device *dev, phys_addr_t addr, u32 range);
+
+
+#endif /* _MEI_HW_TXE_H_ */
diff --git a/drivers/misc/mei/hw.h b/drivers/misc/mei/hw.h
index cb2f556b425..dd448e58cc8 100644
--- a/drivers/misc/mei/hw.h
+++ b/drivers/misc/mei/hw.h
@@ -22,7 +22,7 @@
/*
* Timeouts in Seconds
*/
-#define MEI_INTEROP_TIMEOUT 7 /* Timeout on ready message */
+#define MEI_HW_READY_TIMEOUT 2 /* Timeout on ready message */
#define MEI_CONNECT_TIMEOUT 3 /* HPS: at least 2 seconds */
#define MEI_CL_CONNECT_TIMEOUT 15 /* HPS: Client Connect Timeout */
@@ -31,13 +31,20 @@
#define MEI_IAMTHIF_STALL_TIMER 12 /* HPS */
#define MEI_IAMTHIF_READ_TIMER 10 /* HPS */
+#define MEI_PGI_TIMEOUT 1 /* PG Isolation time response 1 sec */
+#define MEI_HBM_TIMEOUT 1 /* 1 second */
/*
* MEI Version
*/
-#define HBM_MINOR_VERSION 0
+#define HBM_MINOR_VERSION 1
#define HBM_MAJOR_VERSION 1
-#define HBM_TIMEOUT 1 /* 1 second */
+
+/*
+ * MEI version with PGI support
+ */
+#define HBM_MINOR_VERSION_PGI 1
+#define HBM_MAJOR_VERSION_PGI 1
/* Host bus message command opcode */
#define MEI_HBM_CMD_OP_MSK 0x7f
@@ -69,6 +76,11 @@
#define MEI_FLOW_CONTROL_CMD 0x08
+#define MEI_PG_ISOLATION_ENTRY_REQ_CMD 0x0a
+#define MEI_PG_ISOLATION_ENTRY_RES_CMD 0x8a
+#define MEI_PG_ISOLATION_EXIT_REQ_CMD 0x0b
+#define MEI_PG_ISOLATION_EXIT_RES_CMD 0x8b
+
/*
* MEI Stop Reason
* used by hbm_host_stop_request.reason
@@ -89,19 +101,19 @@ enum mei_stop_reason_types {
* Client Connect Status
* used by hbm_client_connect_response.status
*/
-enum client_connect_status_types {
- CCS_SUCCESS = 0x00,
- CCS_NOT_FOUND = 0x01,
- CCS_ALREADY_STARTED = 0x02,
- CCS_OUT_OF_RESOURCES = 0x03,
- CCS_MESSAGE_SMALL = 0x04
+enum mei_cl_connect_status {
+ MEI_CL_CONN_SUCCESS = 0x00,
+ MEI_CL_CONN_NOT_FOUND = 0x01,
+ MEI_CL_CONN_ALREADY_STARTED = 0x02,
+ MEI_CL_CONN_OUT_OF_RESOURCES = 0x03,
+ MEI_CL_CONN_MESSAGE_SMALL = 0x04
};
/*
* Client Disconnect Status
*/
-enum client_disconnect_status_types {
- CDS_SUCCESS = 0x00
+enum mei_cl_disconnect_status {
+ MEI_CL_DISCONN_SUCCESS = 0x00
};
/*
@@ -111,7 +123,8 @@ struct mei_msg_hdr {
u32 me_addr:8;
u32 host_addr:8;
u32 length:9;
- u32 reserved:6;
+ u32 reserved:5;
+ u32 internal:1;
u32 msg_complete:1;
} __packed;
@@ -207,6 +220,17 @@ struct hbm_props_response {
} __packed;
/**
+ * struct hbm_power_gate - power gate request/response
+ *
+ * @hbm_cmd - bus message command header
+ * @reserved[3]
+ */
+struct hbm_power_gate {
+ u8 hbm_cmd;
+ u8 reserved[3];
+} __packed;
+
+/**
* struct hbm_client_connect_request - connect/disconnect request
*
* @hbm_cmd - bus message command header
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index 92c73118b13..00692922248 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -43,33 +43,120 @@ const char *mei_dev_state_str(int state)
#undef MEI_DEV_STATE
}
-void mei_device_init(struct mei_device *dev)
+
+/**
+ * mei_cancel_work. Cancel mei background jobs
+ *
+ * @dev: the device structure
+ *
+ * returns 0 on success or < 0 if the reset hasn't succeeded
+ */
+void mei_cancel_work(struct mei_device *dev)
{
- /* setup our list array */
- INIT_LIST_HEAD(&dev->file_list);
- INIT_LIST_HEAD(&dev->device_list);
- mutex_init(&dev->device_lock);
- init_waitqueue_head(&dev->wait_hw_ready);
- init_waitqueue_head(&dev->wait_recvd_msg);
- init_waitqueue_head(&dev->wait_stop_wd);
- dev->dev_state = MEI_DEV_INITIALIZING;
+ cancel_work_sync(&dev->init_work);
+ cancel_work_sync(&dev->reset_work);
- mei_io_list_init(&dev->read_list);
- mei_io_list_init(&dev->write_list);
- mei_io_list_init(&dev->write_waiting_list);
- mei_io_list_init(&dev->ctrl_wr_list);
- mei_io_list_init(&dev->ctrl_rd_list);
+ cancel_delayed_work(&dev->timer_work);
+}
+EXPORT_SYMBOL_GPL(mei_cancel_work);
- INIT_DELAYED_WORK(&dev->timer_work, mei_timer);
- INIT_WORK(&dev->init_work, mei_host_client_init);
+/**
+ * mei_reset - resets host and fw.
+ *
+ * @dev: the device structure
+ */
+int mei_reset(struct mei_device *dev)
+{
+ enum mei_dev_state state = dev->dev_state;
+ bool interrupts_enabled;
+ int ret;
- INIT_LIST_HEAD(&dev->wd_cl.link);
- INIT_LIST_HEAD(&dev->iamthif_cl.link);
- mei_io_list_init(&dev->amthif_cmd_list);
- mei_io_list_init(&dev->amthif_rd_complete_list);
+ if (state != MEI_DEV_INITIALIZING &&
+ state != MEI_DEV_DISABLED &&
+ state != MEI_DEV_POWER_DOWN &&
+ state != MEI_DEV_POWER_UP) {
+ struct mei_fw_status fw_status;
+ mei_fw_status(dev, &fw_status);
+ dev_warn(&dev->pdev->dev,
+ "unexpected reset: dev_state = %s " FW_STS_FMT "\n",
+ mei_dev_state_str(state), FW_STS_PRM(fw_status));
+ }
+
+ /* we're already in reset, cancel the init timer
+ * if the reset was called due the hbm protocol error
+ * we need to call it before hw start
+ * so the hbm watchdog won't kick in
+ */
+ mei_hbm_idle(dev);
+ /* enter reset flow */
+ interrupts_enabled = state != MEI_DEV_POWER_DOWN;
+ dev->dev_state = MEI_DEV_RESETTING;
+
+ dev->reset_count++;
+ if (dev->reset_count > MEI_MAX_CONSEC_RESET) {
+ dev_err(&dev->pdev->dev, "reset: reached maximal consecutive resets: disabling the device\n");
+ dev->dev_state = MEI_DEV_DISABLED;
+ return -ENODEV;
+ }
+
+ ret = mei_hw_reset(dev, interrupts_enabled);
+ /* fall through and remove the sw state even if hw reset has failed */
+
+ /* no need to clean up software state in case of power up */
+ if (state != MEI_DEV_INITIALIZING &&
+ state != MEI_DEV_POWER_UP) {
+
+ /* remove all waiting requests */
+ mei_cl_all_write_clear(dev);
+
+ mei_cl_all_disconnect(dev);
+
+ /* wake up all readers and writers so they can be interrupted */
+ mei_cl_all_wakeup(dev);
+
+ /* remove entry if already in list */
+ dev_dbg(&dev->pdev->dev, "remove iamthif and wd from the file list.\n");
+ mei_cl_unlink(&dev->wd_cl);
+ mei_cl_unlink(&dev->iamthif_cl);
+ mei_amthif_reset_params(dev);
+ }
+
+ mei_hbm_reset(dev);
+
+ dev->rd_msg_hdr = 0;
+ dev->wd_pending = false;
+
+ if (ret) {
+ dev_err(&dev->pdev->dev, "hw_reset failed ret = %d\n", ret);
+ return ret;
+ }
+
+ if (state == MEI_DEV_POWER_DOWN) {
+ dev_dbg(&dev->pdev->dev, "powering down: end of reset\n");
+ dev->dev_state = MEI_DEV_DISABLED;
+ return 0;
+ }
+
+ ret = mei_hw_start(dev);
+ if (ret) {
+ dev_err(&dev->pdev->dev, "hw_start failed ret = %d\n", ret);
+ return ret;
+ }
+
+ dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n");
+
+ dev->dev_state = MEI_DEV_INIT_CLIENTS;
+ ret = mei_hbm_start_req(dev);
+ if (ret) {
+ dev_err(&dev->pdev->dev, "hbm_start failed ret = %d\n", ret);
+ dev->dev_state = MEI_DEV_RESETTING;
+ return ret;
+ }
+
+ return 0;
}
-EXPORT_SYMBOL_GPL(mei_device_init);
+EXPORT_SYMBOL_GPL(mei_reset);
/**
* mei_start - initializes host and fw to start work.
@@ -80,16 +167,32 @@ EXPORT_SYMBOL_GPL(mei_device_init);
*/
int mei_start(struct mei_device *dev)
{
+ int ret;
mutex_lock(&dev->device_lock);
- /* acknowledge interrupt and stop interupts */
+ /* acknowledge interrupt and stop interrupts */
mei_clear_interrupts(dev);
mei_hw_config(dev);
dev_dbg(&dev->pdev->dev, "reset in start the mei device.\n");
- mei_reset(dev, 1);
+ dev->reset_count = 0;
+ do {
+ dev->dev_state = MEI_DEV_INITIALIZING;
+ ret = mei_reset(dev);
+
+ if (ret == -ENODEV || dev->dev_state == MEI_DEV_DISABLED) {
+ dev_err(&dev->pdev->dev, "reset failed ret = %d", ret);
+ goto err;
+ }
+ } while (ret);
+
+ /* we cannot start the device w/o hbm start message completed */
+ if (dev->dev_state == MEI_DEV_DISABLED) {
+ dev_err(&dev->pdev->dev, "reset failed");
+ goto err;
+ }
if (mei_hbm_start_wait(dev)) {
dev_err(&dev->pdev->dev, "HBM haven't started");
@@ -124,103 +227,79 @@ err:
EXPORT_SYMBOL_GPL(mei_start);
/**
- * mei_reset - resets host and fw.
+ * mei_restart - restart device after suspend
*
* @dev: the device structure
- * @interrupts_enabled: if interrupt should be enabled after reset.
+ *
+ * returns 0 on success or -ENODEV if the restart hasn't succeeded
*/
-void mei_reset(struct mei_device *dev, int interrupts_enabled)
+int mei_restart(struct mei_device *dev)
{
- bool unexpected;
- int ret;
+ int err;
- unexpected = (dev->dev_state != MEI_DEV_INITIALIZING &&
- dev->dev_state != MEI_DEV_DISABLED &&
- dev->dev_state != MEI_DEV_POWER_DOWN &&
- dev->dev_state != MEI_DEV_POWER_UP);
+ mutex_lock(&dev->device_lock);
- ret = mei_hw_reset(dev, interrupts_enabled);
- if (ret) {
- dev_err(&dev->pdev->dev, "hw reset failed disabling the device\n");
- interrupts_enabled = false;
- dev->dev_state = MEI_DEV_DISABLED;
- }
+ mei_clear_interrupts(dev);
- dev->hbm_state = MEI_HBM_IDLE;
+ dev->dev_state = MEI_DEV_POWER_UP;
+ dev->reset_count = 0;
- if (dev->dev_state != MEI_DEV_INITIALIZING &&
- dev->dev_state != MEI_DEV_POWER_UP) {
- if (dev->dev_state != MEI_DEV_DISABLED &&
- dev->dev_state != MEI_DEV_POWER_DOWN)
- dev->dev_state = MEI_DEV_RESETTING;
+ err = mei_reset(dev);
- /* remove all waiting requests */
- mei_cl_all_write_clear(dev);
+ mutex_unlock(&dev->device_lock);
- mei_cl_all_disconnect(dev);
+ if (err == -ENODEV || dev->dev_state == MEI_DEV_DISABLED) {
+ dev_err(&dev->pdev->dev, "device disabled = %d\n", err);
+ return -ENODEV;
+ }
- /* wake up all readings so they can be interrupted */
- mei_cl_all_wakeup(dev);
+ /* try to start again */
+ if (err)
+ schedule_work(&dev->reset_work);
- /* remove entry if already in list */
- dev_dbg(&dev->pdev->dev, "remove iamthif and wd from the file list.\n");
- mei_cl_unlink(&dev->wd_cl);
- if (dev->open_handle_count > 0)
- dev->open_handle_count--;
- mei_cl_unlink(&dev->iamthif_cl);
- if (dev->open_handle_count > 0)
- dev->open_handle_count--;
- mei_amthif_reset_params(dev);
- memset(&dev->wr_ext_msg, 0, sizeof(dev->wr_ext_msg));
- }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mei_restart);
- dev->me_clients_num = 0;
- dev->rd_msg_hdr = 0;
- dev->wd_pending = false;
+static void mei_reset_work(struct work_struct *work)
+{
+ struct mei_device *dev =
+ container_of(work, struct mei_device, reset_work);
+ int ret;
- if (unexpected)
- dev_warn(&dev->pdev->dev, "unexpected reset: dev_state = %s\n",
- mei_dev_state_str(dev->dev_state));
+ mutex_lock(&dev->device_lock);
- if (!interrupts_enabled) {
- dev_dbg(&dev->pdev->dev, "intr not enabled end of reset\n");
- return;
- }
+ ret = mei_reset(dev);
- ret = mei_hw_start(dev);
- if (ret) {
- dev_err(&dev->pdev->dev, "hw_start failed disabling the device\n");
- dev->dev_state = MEI_DEV_DISABLED;
+ mutex_unlock(&dev->device_lock);
+
+ if (dev->dev_state == MEI_DEV_DISABLED) {
+ dev_err(&dev->pdev->dev, "device disabled = %d\n", ret);
return;
}
- dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n");
- /* link is established * start sending messages. */
-
- dev->dev_state = MEI_DEV_INIT_CLIENTS;
-
- mei_hbm_start_req(dev);
-
+ /* retry reset in case of failure */
+ if (ret)
+ schedule_work(&dev->reset_work);
}
-EXPORT_SYMBOL_GPL(mei_reset);
void mei_stop(struct mei_device *dev)
{
dev_dbg(&dev->pdev->dev, "stopping the device.\n");
- flush_scheduled_work();
+ mei_cancel_work(dev);
- mutex_lock(&dev->device_lock);
+ mei_nfc_host_exit(dev);
- cancel_delayed_work(&dev->timer_work);
+ mei_cl_bus_remove_devices(dev);
- mei_wd_stop(dev);
+ mutex_lock(&dev->device_lock);
- mei_nfc_host_exit();
+ mei_wd_stop(dev);
dev->dev_state = MEI_DEV_POWER_DOWN;
- mei_reset(dev, 0);
+ mei_reset(dev);
mutex_unlock(&dev->device_lock);
@@ -228,5 +307,89 @@ void mei_stop(struct mei_device *dev)
}
EXPORT_SYMBOL_GPL(mei_stop);
+/**
+ * mei_write_is_idle - check if the write queues are idle
+ *
+ * @dev: the device structure
+ *
+ * returns true of there is no pending write
+ */
+bool mei_write_is_idle(struct mei_device *dev)
+{
+ bool idle = (dev->dev_state == MEI_DEV_ENABLED &&
+ list_empty(&dev->ctrl_wr_list.list) &&
+ list_empty(&dev->write_list.list));
+
+ dev_dbg(&dev->pdev->dev, "write pg: is idle[%d] state=%s ctrl=%d write=%d\n",
+ idle,
+ mei_dev_state_str(dev->dev_state),
+ list_empty(&dev->ctrl_wr_list.list),
+ list_empty(&dev->write_list.list));
+
+ return idle;
+}
+EXPORT_SYMBOL_GPL(mei_write_is_idle);
+
+int mei_fw_status(struct mei_device *dev, struct mei_fw_status *fw_status)
+{
+ int i;
+ const struct mei_fw_status *fw_src = &dev->cfg->fw_status;
+
+ if (!fw_status)
+ return -EINVAL;
+
+ fw_status->count = fw_src->count;
+ for (i = 0; i < fw_src->count && i < MEI_FW_STATUS_MAX; i++) {
+ int ret;
+ ret = pci_read_config_dword(dev->pdev,
+ fw_src->status[i], &fw_status->status[i]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mei_fw_status);
+void mei_device_init(struct mei_device *dev, const struct mei_cfg *cfg)
+{
+ /* setup our list array */
+ INIT_LIST_HEAD(&dev->file_list);
+ INIT_LIST_HEAD(&dev->device_list);
+ mutex_init(&dev->device_lock);
+ init_waitqueue_head(&dev->wait_hw_ready);
+ init_waitqueue_head(&dev->wait_pg);
+ init_waitqueue_head(&dev->wait_recvd_msg);
+ init_waitqueue_head(&dev->wait_stop_wd);
+ dev->dev_state = MEI_DEV_INITIALIZING;
+ dev->reset_count = 0;
+
+ mei_io_list_init(&dev->read_list);
+ mei_io_list_init(&dev->write_list);
+ mei_io_list_init(&dev->write_waiting_list);
+ mei_io_list_init(&dev->ctrl_wr_list);
+ mei_io_list_init(&dev->ctrl_rd_list);
+
+ INIT_DELAYED_WORK(&dev->timer_work, mei_timer);
+ INIT_WORK(&dev->init_work, mei_host_client_init);
+ INIT_WORK(&dev->reset_work, mei_reset_work);
+
+ INIT_LIST_HEAD(&dev->wd_cl.link);
+ INIT_LIST_HEAD(&dev->iamthif_cl.link);
+ mei_io_list_init(&dev->amthif_cmd_list);
+ mei_io_list_init(&dev->amthif_rd_complete_list);
+
+ bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX);
+ dev->open_handle_count = 0;
+
+ /*
+ * Reserving the first client ID
+ * 0: Reserved for MEI Bus Message communications
+ */
+ bitmap_set(dev->host_clients_map, 0, 1);
+
+ dev->pg_event = MEI_PG_EVENT_IDLE;
+ dev->cfg = cfg;
+}
+EXPORT_SYMBOL_GPL(mei_device_init);
diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c
index 4b59cb742de..4e3cba6da3f 100644
--- a/drivers/misc/mei/interrupt.c
+++ b/drivers/misc/mei/interrupt.c
@@ -26,12 +26,11 @@
#include "mei_dev.h"
#include "hbm.h"
-#include "hw-me.h"
#include "client.h"
/**
- * mei_irq_compl_handler - dispatch complete handelers
+ * mei_irq_compl_handler - dispatch complete handlers
* for the completed callbacks
*
* @dev - mei device
@@ -113,13 +112,13 @@ static int mei_cl_irq_read_msg(struct mei_device *dev,
if (cb->response_buffer.size == 0 ||
cb->response_buffer.data == NULL) {
- dev_err(&dev->pdev->dev, "response buffer is not allocated.\n");
+ cl_err(dev, cl, "response buffer is not allocated.\n");
list_del(&cb->list);
return -ENOMEM;
}
if (cb->response_buffer.size < mei_hdr->length + cb->buf_idx) {
- dev_dbg(&dev->pdev->dev, "message overflow. size %d len %d idx %ld\n",
+ cl_dbg(dev, cl, "message overflow. size %d len %d idx %ld\n",
cb->response_buffer.size,
mei_hdr->length, cb->buf_idx);
buffer = krealloc(cb->response_buffer.data,
@@ -127,7 +126,7 @@ static int mei_cl_irq_read_msg(struct mei_device *dev,
GFP_KERNEL);
if (!buffer) {
- dev_err(&dev->pdev->dev, "allocation failed.\n");
+ cl_err(dev, cl, "allocation failed.\n");
list_del(&cb->list);
return -ENOMEM;
}
@@ -143,9 +142,7 @@ static int mei_cl_irq_read_msg(struct mei_device *dev,
if (mei_hdr->msg_complete) {
cl->status = 0;
list_del(&cb->list);
- dev_dbg(&dev->pdev->dev, "completed read H cl = %d, ME cl = %d, length = %lu\n",
- cl->host_client_id,
- cl->me_client_id,
+ cl_dbg(dev, cl, "completed read length = %lu\n",
cb->buf_idx);
list_add_tail(&cb->list, &complete_list->list);
}
@@ -163,29 +160,63 @@ static int mei_cl_irq_read_msg(struct mei_device *dev,
}
/**
+ * mei_cl_irq_disconnect_rsp - send disconnection response message
+ *
+ * @cl: client
+ * @cb: callback block.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int mei_cl_irq_disconnect_rsp(struct mei_cl *cl, struct mei_cl_cb *cb,
+ struct mei_cl_cb *cmpl_list)
+{
+ struct mei_device *dev = cl->dev;
+ u32 msg_slots;
+ int slots;
+ int ret;
+
+ slots = mei_hbuf_empty_slots(dev);
+ msg_slots = mei_data2slots(sizeof(struct hbm_client_connect_response));
+
+ if (slots < msg_slots)
+ return -EMSGSIZE;
+
+ ret = mei_hbm_cl_disconnect_rsp(dev, cl);
+
+ cl->state = MEI_FILE_DISCONNECTED;
+ cl->status = 0;
+ list_del(&cb->list);
+ mei_io_cb_free(cb);
+
+ return ret;
+}
+
+
+
+/**
* mei_cl_irq_close - processes close related operation from
* interrupt thread context - send disconnect request
*
* @cl: client
* @cb: callback block.
- * @slots: free slots.
* @cmpl_list: complete list.
*
* returns 0, OK; otherwise, error.
*/
static int mei_cl_irq_close(struct mei_cl *cl, struct mei_cl_cb *cb,
- s32 *slots, struct mei_cl_cb *cmpl_list)
+ struct mei_cl_cb *cmpl_list)
{
struct mei_device *dev = cl->dev;
+ u32 msg_slots;
+ int slots;
- u32 msg_slots =
- mei_data2slots(sizeof(struct hbm_client_connect_request));
+ msg_slots = mei_data2slots(sizeof(struct hbm_client_connect_request));
+ slots = mei_hbuf_empty_slots(dev);
- if (*slots < msg_slots)
+ if (slots < msg_slots)
return -EMSGSIZE;
- *slots -= msg_slots;
-
if (mei_hbm_cl_disconnect_req(dev, cl)) {
cl->status = 0;
cb->buf_idx = 0;
@@ -209,32 +240,32 @@ static int mei_cl_irq_close(struct mei_cl *cl, struct mei_cl_cb *cb,
*
* @cl: client
* @cb: callback block.
- * @slots: free slots.
* @cmpl_list: complete list.
*
* returns 0, OK; otherwise, error.
*/
static int mei_cl_irq_read(struct mei_cl *cl, struct mei_cl_cb *cb,
- s32 *slots, struct mei_cl_cb *cmpl_list)
+ struct mei_cl_cb *cmpl_list)
{
struct mei_device *dev = cl->dev;
+ u32 msg_slots;
+ int slots;
+ int ret;
- u32 msg_slots = mei_data2slots(sizeof(struct hbm_flow_control));
+ msg_slots = mei_data2slots(sizeof(struct hbm_flow_control));
+ slots = mei_hbuf_empty_slots(dev);
- if (*slots < msg_slots) {
- /* return the cancel routine */
- list_del(&cb->list);
+ if (slots < msg_slots)
return -EMSGSIZE;
- }
-
- *slots -= msg_slots;
- if (mei_hbm_cl_flow_control_req(dev, cl)) {
- cl->status = -ENODEV;
+ ret = mei_hbm_cl_flow_control_req(dev, cl);
+ if (ret) {
+ cl->status = ret;
cb->buf_idx = 0;
list_move_tail(&cb->list, &cmpl_list->list);
- return -ENODEV;
+ return ret;
}
+
list_move_tail(&cb->list, &dev->read_list.list);
return 0;
@@ -242,39 +273,39 @@ static int mei_cl_irq_read(struct mei_cl *cl, struct mei_cl_cb *cb,
/**
- * mei_cl_irq_ioctl - processes client ioctl related operation from the
- * interrupt thread context - send connection request
+ * mei_cl_irq_connect - send connect request in irq_thread context
*
* @cl: client
* @cb: callback block.
- * @slots: free slots.
* @cmpl_list: complete list.
*
* returns 0, OK; otherwise, error.
*/
-static int mei_cl_irq_ioctl(struct mei_cl *cl, struct mei_cl_cb *cb,
- s32 *slots, struct mei_cl_cb *cmpl_list)
+static int mei_cl_irq_connect(struct mei_cl *cl, struct mei_cl_cb *cb,
+ struct mei_cl_cb *cmpl_list)
{
struct mei_device *dev = cl->dev;
+ u32 msg_slots;
+ int slots;
+ int ret;
- u32 msg_slots =
- mei_data2slots(sizeof(struct hbm_client_connect_request));
+ msg_slots = mei_data2slots(sizeof(struct hbm_client_connect_request));
+ slots = mei_hbuf_empty_slots(dev);
- if (*slots < msg_slots) {
- /* return the cancel routine */
- list_del(&cb->list);
- return -EMSGSIZE;
- }
+ if (mei_cl_is_other_connecting(cl))
+ return 0;
- *slots -= msg_slots;
+ if (slots < msg_slots)
+ return -EMSGSIZE;
cl->state = MEI_FILE_CONNECTING;
- if (mei_hbm_cl_connect_req(dev, cl)) {
- cl->status = -ENODEV;
+ ret = mei_hbm_cl_connect_req(dev, cl);
+ if (ret) {
+ cl->status = ret;
cb->buf_idx = 0;
list_del(&cb->list);
- return -ENODEV;
+ return ret;
}
list_move_tail(&cb->list, &dev->ctrl_rd_list.list);
@@ -297,13 +328,11 @@ int mei_irq_read_handler(struct mei_device *dev,
struct mei_cl_cb *cmpl_list, s32 *slots)
{
struct mei_msg_hdr *mei_hdr;
- struct mei_cl *cl_pos = NULL;
- struct mei_cl *cl_next = NULL;
- int ret = 0;
+ struct mei_cl *cl;
+ int ret;
if (!dev->rd_msg_hdr) {
dev->rd_msg_hdr = mei_read_hdr(dev);
- dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots);
(*slots)--;
dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots);
}
@@ -311,61 +340,67 @@ int mei_irq_read_handler(struct mei_device *dev,
dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr));
if (mei_hdr->reserved || !dev->rd_msg_hdr) {
- dev_dbg(&dev->pdev->dev, "corrupted message header.\n");
+ dev_err(&dev->pdev->dev, "corrupted message header 0x%08X\n",
+ dev->rd_msg_hdr);
ret = -EBADMSG;
goto end;
}
- if (mei_hdr->host_addr || mei_hdr->me_addr) {
- list_for_each_entry_safe(cl_pos, cl_next,
- &dev->file_list, link) {
- dev_dbg(&dev->pdev->dev,
- "list_for_each_entry_safe read host"
- " client = %d, ME client = %d\n",
- cl_pos->host_client_id,
- cl_pos->me_client_id);
- if (mei_cl_hbm_equal(cl_pos, mei_hdr))
- break;
- }
+ if (mei_slots2data(*slots) < mei_hdr->length) {
+ dev_err(&dev->pdev->dev, "less data available than length=%08x.\n",
+ *slots);
+ /* we can't read the message */
+ ret = -ENODATA;
+ goto end;
+ }
- if (&cl_pos->link == &dev->file_list) {
- dev_dbg(&dev->pdev->dev, "corrupted message header\n");
- ret = -EBADMSG;
+ /* HBM message */
+ if (mei_hdr->host_addr == 0 && mei_hdr->me_addr == 0) {
+ ret = mei_hbm_dispatch(dev, mei_hdr);
+ if (ret) {
+ dev_dbg(&dev->pdev->dev, "mei_hbm_dispatch failed ret = %d\n",
+ ret);
goto end;
}
+ goto reset_slots;
}
- if (((*slots) * sizeof(u32)) < mei_hdr->length) {
- dev_err(&dev->pdev->dev,
- "we can't read the message slots =%08x.\n",
- *slots);
- /* we can't read the message */
- ret = -ERANGE;
- goto end;
+
+ /* find recipient cl */
+ list_for_each_entry(cl, &dev->file_list, link) {
+ if (mei_cl_hbm_equal(cl, mei_hdr)) {
+ cl_dbg(dev, cl, "got a message\n");
+ break;
+ }
}
- /* decide where to read the message too */
- if (!mei_hdr->host_addr) {
- dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_bus_message.\n");
- mei_hbm_dispatch(dev, mei_hdr);
- dev_dbg(&dev->pdev->dev, "end mei_irq_thread_read_bus_message.\n");
- } else if (mei_hdr->host_addr == dev->iamthif_cl.host_client_id &&
- (MEI_FILE_CONNECTED == dev->iamthif_cl.state) &&
- (dev->iamthif_state == MEI_IAMTHIF_READING)) {
+ /* if no recipient cl was found we assume corrupted header */
+ if (&cl->link == &dev->file_list) {
+ dev_err(&dev->pdev->dev, "no destination client found 0x%08X\n",
+ dev->rd_msg_hdr);
+ ret = -EBADMSG;
+ goto end;
+ }
- dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_iamthif_message.\n");
- dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr));
+ if (mei_hdr->host_addr == dev->iamthif_cl.host_client_id &&
+ MEI_FILE_CONNECTED == dev->iamthif_cl.state &&
+ dev->iamthif_state == MEI_IAMTHIF_READING) {
ret = mei_amthif_irq_read_msg(dev, mei_hdr, cmpl_list);
- if (ret)
+ if (ret) {
+ dev_err(&dev->pdev->dev, "mei_amthif_irq_read_msg failed = %d\n",
+ ret);
goto end;
+ }
} else {
- dev_dbg(&dev->pdev->dev, "call mei_cl_irq_read_msg.\n");
- dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr));
ret = mei_cl_irq_read_msg(dev, mei_hdr, cmpl_list);
- if (ret)
+ if (ret) {
+ dev_err(&dev->pdev->dev, "mei_cl_irq_read_msg failed = %d\n",
+ ret);
goto end;
+ }
}
+reset_slots:
/* reset the number of slots and header */
*slots = mei_count_full_read_slots(dev);
dev->rd_msg_hdr = 0;
@@ -401,10 +436,10 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list)
s32 slots;
int ret;
- if (!mei_hbuf_is_ready(dev)) {
- dev_dbg(&dev->pdev->dev, "host buffer is not empty.\n");
+
+ if (!mei_hbuf_acquire(dev))
return 0;
- }
+
slots = mei_hbuf_empty_slots(dev);
if (slots <= 0)
return -EMSGSIZE;
@@ -420,15 +455,14 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list)
cl->status = 0;
list_del(&cb->list);
- if (MEI_WRITING == cl->writing_state &&
- cb->fop_type == MEI_FOP_WRITE &&
+ if (cb->fop_type == MEI_FOP_WRITE &&
cl != &dev->iamthif_cl) {
- dev_dbg(&dev->pdev->dev, "MEI WRITE COMPLETE\n");
+ cl_dbg(dev, cl, "MEI WRITE COMPLETE\n");
cl->writing_state = MEI_WRITE_COMPLETE;
list_add_tail(&cb->list, &cmpl_list->list);
}
if (cl == &dev->iamthif_cl) {
- dev_dbg(&dev->pdev->dev, "check iamthif flow control.\n");
+ cl_dbg(dev, cl, "check iamthif flow control.\n");
if (dev->iamthif_flow_control_pending) {
ret = mei_amthif_irq_read(dev, &slots);
if (ret)
@@ -439,29 +473,16 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list)
if (dev->wd_state == MEI_WD_STOPPING) {
dev->wd_state = MEI_WD_IDLE;
- wake_up_interruptible(&dev->wait_stop_wd);
+ wake_up(&dev->wait_stop_wd);
}
- if (dev->wr_ext_msg.hdr.length) {
- mei_write_message(dev, &dev->wr_ext_msg.hdr,
- dev->wr_ext_msg.data);
- slots -= mei_data2slots(dev->wr_ext_msg.hdr.length);
- dev->wr_ext_msg.hdr.length = 0;
- }
- if (dev->dev_state == MEI_DEV_ENABLED) {
+ if (mei_cl_is_connected(&dev->wd_cl)) {
if (dev->wd_pending &&
mei_cl_flow_ctrl_creds(&dev->wd_cl) > 0) {
- if (mei_wd_send(dev))
- dev_dbg(&dev->pdev->dev, "wd send failed.\n");
- else if (mei_cl_flow_ctrl_reduce(&dev->wd_cl))
- return -ENODEV;
-
+ ret = mei_wd_send(dev);
+ if (ret)
+ return ret;
dev->wd_pending = false;
-
- if (dev->wd_state == MEI_WD_RUNNING)
- slots -= mei_data2slots(MEI_WD_START_MSG_SIZE);
- else
- slots -= mei_data2slots(MEI_WD_STOP_MSG_SIZE);
}
}
@@ -476,28 +497,31 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list)
switch (cb->fop_type) {
case MEI_FOP_CLOSE:
/* send disconnect message */
- ret = mei_cl_irq_close(cl, cb, &slots, cmpl_list);
+ ret = mei_cl_irq_close(cl, cb, cmpl_list);
if (ret)
return ret;
break;
case MEI_FOP_READ:
/* send flow control message */
- ret = mei_cl_irq_read(cl, cb, &slots, cmpl_list);
+ ret = mei_cl_irq_read(cl, cb, cmpl_list);
if (ret)
return ret;
break;
- case MEI_FOP_IOCTL:
+ case MEI_FOP_CONNECT:
/* connect message */
- if (mei_cl_is_other_connecting(cl))
- continue;
- ret = mei_cl_irq_ioctl(cl, cb, &slots, cmpl_list);
+ ret = mei_cl_irq_connect(cl, cb, cmpl_list);
if (ret)
return ret;
break;
-
+ case MEI_FOP_DISCONNECT_RSP:
+ /* send disconnect resp */
+ ret = mei_cl_irq_disconnect_rsp(cl, cb, cmpl_list);
+ if (ret)
+ return ret;
+ break;
default:
BUG();
}
@@ -509,19 +533,10 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list)
cl = cb->cl;
if (cl == NULL)
continue;
- if (mei_cl_flow_ctrl_creds(cl) <= 0) {
- dev_dbg(&dev->pdev->dev,
- "No flow control credentials for client %d, not sending.\n",
- cl->host_client_id);
- continue;
- }
-
if (cl == &dev->iamthif_cl)
- ret = mei_amthif_irq_write_complete(cl, cb,
- &slots, cmpl_list);
+ ret = mei_amthif_irq_write(cl, cb, cmpl_list);
else
- ret = mei_cl_irq_write_complete(cl, cb,
- &slots, cmpl_list);
+ ret = mei_cl_irq_write(cl, cb, cmpl_list);
if (ret)
return ret;
}
@@ -536,13 +551,11 @@ EXPORT_SYMBOL_GPL(mei_irq_write_handler);
*
* @work: pointer to the work_struct structure
*
- * NOTE: This function is called by timer interrupt work
*/
void mei_timer(struct work_struct *work)
{
unsigned long timeout;
- struct mei_cl *cl_pos = NULL;
- struct mei_cl *cl_next = NULL;
+ struct mei_cl *cl;
struct mei_cl_cb *cb_pos = NULL;
struct mei_cl_cb *cb_next = NULL;
@@ -551,33 +564,42 @@ void mei_timer(struct work_struct *work)
mutex_lock(&dev->device_lock);
- if (dev->dev_state != MEI_DEV_ENABLED) {
- if (dev->dev_state == MEI_DEV_INIT_CLIENTS) {
- if (dev->init_clients_timer) {
- if (--dev->init_clients_timer == 0) {
- dev_err(&dev->pdev->dev, "reset: init clients timeout hbm_state = %d.\n",
- dev->hbm_state);
- mei_reset(dev, 1);
- }
+
+ /* Catch interrupt stalls during HBM init handshake */
+ if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
+ dev->hbm_state != MEI_HBM_IDLE) {
+
+ if (dev->init_clients_timer) {
+ if (--dev->init_clients_timer == 0) {
+ dev_err(&dev->pdev->dev, "timer: init clients timeout hbm_state = %d.\n",
+ dev->hbm_state);
+ mei_reset(dev);
+ goto out;
}
}
- goto out;
}
+
+ if (dev->dev_state != MEI_DEV_ENABLED)
+ goto out;
+
/*** connect/disconnect timeouts ***/
- list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) {
- if (cl_pos->timer_count) {
- if (--cl_pos->timer_count == 0) {
- dev_err(&dev->pdev->dev, "reset: connect/disconnect timeout.\n");
- mei_reset(dev, 1);
+ list_for_each_entry(cl, &dev->file_list, link) {
+ if (cl->timer_count) {
+ if (--cl->timer_count == 0) {
+ dev_err(&dev->pdev->dev, "timer: connect/disconnect timeout.\n");
+ mei_reset(dev);
goto out;
}
}
}
+ if (!mei_cl_is_connected(&dev->iamthif_cl))
+ goto out;
+
if (dev->iamthif_stall_timer) {
if (--dev->iamthif_stall_timer == 0) {
- dev_err(&dev->pdev->dev, "reset: amthif hanged.\n");
- mei_reset(dev, 1);
+ dev_err(&dev->pdev->dev, "timer: amthif hanged.\n");
+ mei_reset(dev);
dev->iamthif_msg_buf_size = 0;
dev->iamthif_msg_buf_index = 0;
dev->iamthif_canceled = false;
@@ -613,10 +635,10 @@ void mei_timer(struct work_struct *work)
list_for_each_entry_safe(cb_pos, cb_next,
&dev->amthif_rd_complete_list.list, list) {
- cl_pos = cb_pos->file_object->private_data;
+ cl = cb_pos->file_object->private_data;
/* Finding the AMTHI entry. */
- if (cl_pos == &dev->iamthif_cl)
+ if (cl == &dev->iamthif_cl)
list_del(&cb_pos->list);
}
mei_io_cb_free(dev->iamthif_current_cb);
@@ -630,7 +652,8 @@ void mei_timer(struct work_struct *work)
}
}
out:
- schedule_delayed_work(&dev->timer_work, 2 * HZ);
+ if (dev->dev_state != MEI_DEV_DISABLED)
+ schedule_delayed_work(&dev->timer_work, 2 * HZ);
mutex_unlock(&dev->device_lock);
}
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 173ff095be0..66f0a1a0645 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -13,9 +13,6 @@
* more details.
*
*/
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
@@ -40,7 +37,6 @@
#include <linux/mei.h>
#include "mei_dev.h"
-#include "hw-me.h"
#include "client.h"
/**
@@ -48,7 +44,7 @@
*
* @inode: pointer to inode structure
* @file: pointer to file structure
- e
+ *
* returns 0 on success, <0 on error
*/
static int mei_open(struct inode *inode, struct file *file)
@@ -60,48 +56,45 @@ static int mei_open(struct inode *inode, struct file *file)
int err;
- err = -ENODEV;
if (!misc->parent)
- goto out;
+ return -ENODEV;
pdev = container_of(misc->parent, struct pci_dev, dev);
dev = pci_get_drvdata(pdev);
if (!dev)
- goto out;
+ return -ENODEV;
mutex_lock(&dev->device_lock);
- err = -ENOMEM;
- cl = mei_cl_allocate(dev);
- if (!cl)
- goto out_unlock;
+
+ cl = NULL;
err = -ENODEV;
if (dev->dev_state != MEI_DEV_ENABLED) {
dev_dbg(&dev->pdev->dev, "dev_state != MEI_ENABLED dev_state = %s\n",
mei_dev_state_str(dev->dev_state));
- goto out_unlock;
- }
- err = -EMFILE;
- if (dev->open_handle_count >= MEI_MAX_OPEN_HANDLE_COUNT) {
- dev_err(&dev->pdev->dev, "open_handle_count exceded %d",
- MEI_MAX_OPEN_HANDLE_COUNT);
- goto out_unlock;
+ goto err_unlock;
}
+ err = -ENOMEM;
+ cl = mei_cl_allocate(dev);
+ if (!cl)
+ goto err_unlock;
+
+ /* open_handle_count check is handled in the mei_cl_link */
err = mei_cl_link(cl, MEI_HOST_CLIENT_ID_ANY);
if (err)
- goto out_unlock;
+ goto err_unlock;
file->private_data = cl;
+
mutex_unlock(&dev->device_lock);
return nonseekable_open(inode, file);
-out_unlock:
+err_unlock:
mutex_unlock(&dev->device_lock);
kfree(cl);
-out:
return err;
}
@@ -132,22 +125,12 @@ static int mei_release(struct inode *inode, struct file *file)
}
if (cl->state == MEI_FILE_CONNECTED) {
cl->state = MEI_FILE_DISCONNECTING;
- dev_dbg(&dev->pdev->dev,
- "disconnecting client host client = %d, "
- "ME client = %d\n",
- cl->host_client_id,
- cl->me_client_id);
+ cl_dbg(dev, cl, "disconnecting\n");
rets = mei_cl_disconnect(cl);
}
mei_cl_flush_queues(cl);
- dev_dbg(&dev->pdev->dev, "remove client host client = %d, ME client = %d\n",
- cl->host_client_id,
- cl->me_client_id);
+ cl_dbg(dev, cl, "removing\n");
- if (dev->open_handle_count > 0) {
- clear_bit(cl->host_client_id, dev->host_clients_map);
- dev->open_handle_count--;
- }
mei_cl_unlink(cl);
@@ -165,10 +148,7 @@ static int mei_release(struct inode *inode, struct file *file)
file->private_data = NULL;
- if (cb) {
- mei_io_cb_free(cb);
- cb = NULL;
- }
+ mei_io_cb_free(cb);
kfree(cl);
out:
@@ -203,12 +183,18 @@ static ssize_t mei_read(struct file *file, char __user *ubuf,
dev = cl->dev;
+
mutex_lock(&dev->device_lock);
if (dev->dev_state != MEI_DEV_ENABLED) {
rets = -ENODEV;
goto out;
}
+ if (length == 0) {
+ rets = 0;
+ goto out;
+ }
+
if (cl == &dev->iamthif_cl) {
rets = mei_amthif_read(dev, file, ubuf, length, offset);
goto out;
@@ -249,19 +235,16 @@ static ssize_t mei_read(struct file *file, char __user *ubuf,
mutex_unlock(&dev->device_lock);
if (wait_event_interruptible(cl->rx_wait,
- (MEI_READ_COMPLETE == cl->reading_state ||
- MEI_FILE_INITIALIZING == cl->state ||
- MEI_FILE_DISCONNECTED == cl->state ||
- MEI_FILE_DISCONNECTING == cl->state))) {
+ MEI_READ_COMPLETE == cl->reading_state ||
+ mei_cl_is_transitioning(cl))) {
+
if (signal_pending(current))
return -EINTR;
return -ERESTARTSYS;
}
mutex_lock(&dev->device_lock);
- if (MEI_FILE_INITIALIZING == cl->state ||
- MEI_FILE_DISCONNECTED == cl->state ||
- MEI_FILE_DISCONNECTING == cl->state) {
+ if (mei_cl_is_transitioning(cl)) {
rets = -EBUSY;
goto out;
}
@@ -291,6 +274,7 @@ copy_buffer:
length = min_t(size_t, length, cb->buf_idx - *offset);
if (copy_to_user(ubuf, cb->response_buffer.data + *offset, length)) {
+ dev_dbg(&dev->pdev->dev, "failed to copy data to userland\n");
rets = -EFAULT;
goto free;
}
@@ -347,11 +331,17 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
id = mei_me_cl_by_id(dev, cl->me_client_id);
if (id < 0) {
- rets = -ENODEV;
+ rets = -ENOTTY;
goto out;
}
- if (length > dev->me_clients[id].props.max_msg_length || length <= 0) {
- rets = -EMSGSIZE;
+
+ if (length == 0) {
+ rets = 0;
+ goto out;
+ }
+
+ if (length > dev->me_clients[id].props.max_msg_length) {
+ rets = -EFBIG;
goto out;
}
@@ -404,8 +394,11 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
goto out;
rets = copy_from_user(write_cb->request_buffer.data, ubuf, length);
- if (rets)
+ if (rets) {
+ dev_dbg(&dev->pdev->dev, "failed to copy data from userland\n");
+ rets = -EFAULT;
goto out;
+ }
if (cl == &dev->iamthif_cl) {
rets = mei_amthif_write(dev, write_cb);
@@ -469,12 +462,11 @@ static int mei_ioctl_connect_client(struct file *file,
if (i < 0 || dev->me_clients[i].props.fixed_address) {
dev_dbg(&dev->pdev->dev, "Cannot connect to FW Client UUID = %pUl\n",
&data->in_client_uuid);
- rets = -ENODEV;
+ rets = -ENOTTY;
goto end;
}
cl->me_client_id = dev->me_clients[i].client_id;
- cl->state = MEI_FILE_CONNECTING;
dev_dbg(&dev->pdev->dev, "Connect to FW Client ID = %d\n",
cl->me_client_id);
@@ -492,11 +484,11 @@ static int mei_ioctl_connect_client(struct file *file,
rets = -ENODEV;
goto end;
}
- clear_bit(cl->host_client_id, dev->host_clients_map);
mei_cl_unlink(cl);
kfree(cl);
cl = NULL;
+ dev->iamthif_open_count++;
file->private_data = &dev->iamthif_cl;
client = &data->out_client_properties;
@@ -651,8 +643,7 @@ static unsigned int mei_poll(struct file *file, poll_table *wait)
goto out;
}
- if (MEI_WRITE_COMPLETE == cl->writing_state)
- mask |= (POLLIN | POLLRDNORM);
+ mask |= (POLLIN | POLLRDNORM);
out:
mutex_unlock(&dev->device_lock);
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 7b918b2fb89..5c7e990e2f2 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -24,7 +24,6 @@
#include <linux/mei_cl_bus.h>
#include "hw.h"
-#include "hw-me-regs.h"
#include "hbm.h"
/*
@@ -61,11 +60,16 @@ extern const uuid_le mei_wd_guid;
#define MEI_CLIENTS_MAX 256
/*
+ * maximum number of consecutive resets
+ */
+#define MEI_MAX_CONSEC_RESET 3
+
+/*
* Number of File descriptors/handles
* that can be opened to the driver.
*
* Limit to 255: 256 Total Clients
- * minus internal client for MEI Bus Messags
+ * minus internal client for MEI Bus Messages
*/
#define MEI_MAX_OPEN_HANDLE_COUNT (MEI_CLIENTS_MAX - 1)
@@ -125,16 +129,18 @@ enum mei_wd_states {
/**
* enum mei_cb_file_ops - file operation associated with the callback
- * @MEI_FOP_READ - read
- * @MEI_FOP_WRITE - write
- * @MEI_FOP_IOCTL - ioctl
- * @MEI_FOP_OPEN - open
- * @MEI_FOP_CLOSE - close
+ * @MEI_FOP_READ - read
+ * @MEI_FOP_WRITE - write
+ * @MEI_FOP_CONNECT - connect
+ * @MEI_FOP_DISCONNECT_RSP - disconnect response
+ * @MEI_FOP_OPEN - open
+ * @MEI_FOP_CLOSE - close
*/
enum mei_cb_file_ops {
MEI_FOP_READ = 0,
MEI_FOP_WRITE,
- MEI_FOP_IOCTL,
+ MEI_FOP_CONNECT,
+ MEI_FOP_DISCONNECT_RSP,
MEI_FOP_OPEN,
MEI_FOP_CLOSE
};
@@ -147,6 +153,20 @@ struct mei_msg_data {
unsigned char *data;
};
+/* Maximum number of processed FW status registers */
+#define MEI_FW_STATUS_MAX 2
+
+/*
+ * struct mei_fw_status - storage of FW status data
+ *
+ * @count - number of actually available elements in array
+ * @status - FW status registers
+ */
+struct mei_fw_status {
+ int count;
+ u32 status[MEI_FW_STATUS_MAX];
+};
+
/**
* struct mei_me_client - representation of me (fw) client
*
@@ -178,9 +198,10 @@ struct mei_cl_cb {
unsigned long buf_idx;
unsigned long read_time;
struct file *file_object;
+ u32 internal:1;
};
-/* MEI client instance carried as file->pirvate_data*/
+/* MEI client instance carried as file->private_data*/
struct mei_cl {
struct list_head link;
struct mei_device *dev;
@@ -206,6 +227,7 @@ struct mei_cl {
/** struct mei_hw_ops
*
+ * @fw_status - read FW status from PCI config space
* @host_is_ready - query for host readiness
* @hw_is_ready - query if hw is ready
@@ -213,6 +235,9 @@ struct mei_cl {
* @hw_start - start hw after reset
* @hw_config - configure hw
+ * @pg_state - power gating state of the device
+ * @pg_is_enabled - is power gating enabled
+
* @intr_clear - clear pending interrupts
* @intr_enable - enable interrupts
* @intr_disable - disable interrupts
@@ -230,20 +255,25 @@ struct mei_cl {
*/
struct mei_hw_ops {
- bool (*host_is_ready) (struct mei_device *dev);
+ int (*fw_status)(struct mei_device *dev,
+ struct mei_fw_status *fw_status);
+ bool (*host_is_ready)(struct mei_device *dev);
- bool (*hw_is_ready) (struct mei_device *dev);
- int (*hw_reset) (struct mei_device *dev, bool enable);
- int (*hw_start) (struct mei_device *dev);
- void (*hw_config) (struct mei_device *dev);
+ bool (*hw_is_ready)(struct mei_device *dev);
+ int (*hw_reset)(struct mei_device *dev, bool enable);
+ int (*hw_start)(struct mei_device *dev);
+ void (*hw_config)(struct mei_device *dev);
- void (*intr_clear) (struct mei_device *dev);
- void (*intr_enable) (struct mei_device *dev);
- void (*intr_disable) (struct mei_device *dev);
+ enum mei_pg_state (*pg_state)(struct mei_device *dev);
+ bool (*pg_is_enabled)(struct mei_device *dev);
- int (*hbuf_free_slots) (struct mei_device *dev);
- bool (*hbuf_is_ready) (struct mei_device *dev);
- size_t (*hbuf_max_len) (const struct mei_device *dev);
+ void (*intr_clear)(struct mei_device *dev);
+ void (*intr_enable)(struct mei_device *dev);
+ void (*intr_disable)(struct mei_device *dev);
+
+ int (*hbuf_free_slots)(struct mei_device *dev);
+ bool (*hbuf_is_ready)(struct mei_device *dev);
+ size_t (*hbuf_max_len)(const struct mei_device *dev);
int (*write)(struct mei_device *dev,
struct mei_msg_hdr *hdr,
@@ -252,7 +282,7 @@ struct mei_hw_ops {
int (*rdbuf_full_slots)(struct mei_device *dev);
u32 (*read_hdr)(const struct mei_device *dev);
- int (*read) (struct mei_device *dev,
+ int (*read)(struct mei_device *dev,
unsigned char *buf, unsigned long len);
};
@@ -288,6 +318,7 @@ int __mei_cl_async_send(struct mei_cl *cl, u8 *buf, size_t length);
int __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length);
int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length);
void mei_cl_bus_rx_event(struct mei_cl *cl);
+void mei_cl_bus_remove_devices(struct mei_device *dev);
int mei_cl_bus_init(void);
void mei_cl_bus_exit(void);
@@ -323,16 +354,61 @@ struct mei_cl_device {
void *priv_data;
};
+
+ /**
+ * enum mei_pg_event - power gating transition events
+ *
+ * @MEI_PG_EVENT_IDLE: the driver is not in power gating transition
+ * @MEI_PG_EVENT_WAIT: the driver is waiting for a pg event to complete
+ * @MEI_PG_EVENT_RECEIVED: the driver received pg event
+ */
+enum mei_pg_event {
+ MEI_PG_EVENT_IDLE,
+ MEI_PG_EVENT_WAIT,
+ MEI_PG_EVENT_RECEIVED,
+};
+
+/**
+ * enum mei_pg_state - device internal power gating state
+ *
+ * @MEI_PG_OFF: device is not power gated - it is active
+ * @MEI_PG_ON: device is power gated - it is in lower power state
+ */
+enum mei_pg_state {
+ MEI_PG_OFF = 0,
+ MEI_PG_ON = 1,
+};
+
+/*
+ * mei_cfg
+ *
+ * @fw_status - FW status
+ * @quirk_probe - device exclusion quirk
+ */
+struct mei_cfg {
+ const struct mei_fw_status fw_status;
+ bool (*quirk_probe)(struct pci_dev *pdev);
+};
+
+
+#define MEI_PCI_DEVICE(dev, cfg) \
+ .vendor = PCI_VENDOR_ID_INTEL, .device = (dev), \
+ .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, \
+ .driver_data = (kernel_ulong_t)&(cfg)
+
+
/**
* struct mei_device - MEI private device struct
+ * @reset_count - limits the number of consecutive resets
* @hbm_state - state of host bus message protocol
+ * @pg_event - power gating event
* @mem_addr - mem mapped base register address
* @hbuf_depth - depth of hardware host/write buffer is slots
* @hbuf_is_ready - query if the host host/write buffer is ready
* @wr_msg - the buffer for hbm control messages
- * @wr_ext_msg - the buffer for hbm control responses (set in read cycle)
+ * @cfg - per device generation config and ops
*/
struct mei_device {
struct pci_dev *pdev; /* pointer to pci device struct */
@@ -363,16 +439,26 @@ struct mei_device {
* waiting queue for receive message from FW
*/
wait_queue_head_t wait_hw_ready;
+ wait_queue_head_t wait_pg;
wait_queue_head_t wait_recvd_msg;
wait_queue_head_t wait_stop_wd;
/*
* mei device states
*/
+ unsigned long reset_count;
enum mei_dev_state dev_state;
enum mei_hbm_state hbm_state;
u16 init_clients_timer;
+ /*
+ * Power Gating support
+ */
+ enum mei_pg_event pg_event;
+#ifdef CONFIG_PM_RUNTIME
+ struct dev_pm_domain pg_domain;
+#endif /* CONFIG_PM_RUNTIME */
+
unsigned char rd_msg_buf[MEI_RD_MSG_BUF_SIZE]; /* control messages */
u32 rd_msg_hdr;
@@ -386,19 +472,14 @@ struct mei_device {
unsigned char data[128];
} wr_msg;
- struct {
- struct mei_msg_hdr hdr;
- unsigned char data[4]; /* All HBM messages are 4 bytes */
- } wr_ext_msg; /* for control responses */
-
struct hbm_version version;
struct mei_me_client *me_clients; /* Note: memory has to be allocated */
DECLARE_BITMAP(me_clients_map, MEI_CLIENTS_MAX);
DECLARE_BITMAP(host_clients_map, MEI_CLIENTS_MAX);
- u8 me_clients_num;
- u8 me_client_presentation_num;
- u8 me_client_index;
+ unsigned long me_clients_num;
+ unsigned long me_client_presentation_num;
+ unsigned long me_client_index;
struct mei_cl wd_cl;
enum mei_wd_states wd_state;
@@ -414,6 +495,7 @@ struct mei_device {
struct file *iamthif_file_object;
struct mei_cl iamthif_cl;
struct mei_cl_cb *iamthif_current_cb;
+ long iamthif_open_count;
int iamthif_mtu;
unsigned long iamthif_timer;
u32 iamthif_stall_timer;
@@ -426,6 +508,7 @@ struct mei_device {
bool iamthif_canceled;
struct work_struct init_work;
+ struct work_struct reset_work;
/* List of bus devices */
struct list_head device_list;
@@ -436,6 +519,7 @@ struct mei_device {
const struct mei_hw_ops *ops;
+ const struct mei_cfg *cfg;
char hw[0] __aligned(sizeof(void *));
};
@@ -455,13 +539,25 @@ static inline u32 mei_data2slots(size_t length)
return DIV_ROUND_UP(sizeof(struct mei_msg_hdr) + length, 4);
}
+/**
+ * mei_slots2data- get data in slots - bytes from slots
+ * @slots - number of available slots
+ * returns - number of bytes in slots
+ */
+static inline u32 mei_slots2data(int slots)
+{
+ return slots * 4;
+}
+
/*
* mei init function prototypes
*/
-void mei_device_init(struct mei_device *dev);
-void mei_reset(struct mei_device *dev, int interrupts);
+void mei_device_init(struct mei_device *dev, const struct mei_cfg *cfg);
+int mei_reset(struct mei_device *dev);
int mei_start(struct mei_device *dev);
+int mei_restart(struct mei_device *dev);
void mei_stop(struct mei_device *dev);
+void mei_cancel_work(struct mei_device *dev);
/*
* MEI interrupt functions prototype
@@ -496,8 +592,8 @@ struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev,
void mei_amthif_run_next_cmd(struct mei_device *dev);
-int mei_amthif_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb,
- s32 *slots, struct mei_cl_cb *cmpl_list);
+int mei_amthif_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
+ struct mei_cl_cb *cmpl_list);
void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb);
int mei_amthif_irq_read_msg(struct mei_device *dev,
@@ -509,7 +605,7 @@ int mei_amthif_irq_read(struct mei_device *dev, s32 *slots);
* NFC functions
*/
int mei_nfc_host_init(struct mei_device *dev);
-void mei_nfc_host_exit(void);
+void mei_nfc_host_exit(struct mei_device *dev);
/*
* NFC Client UUID
@@ -524,7 +620,7 @@ int mei_wd_host_init(struct mei_device *dev);
* once we got connection to the WD Client
* @dev - mei device
*/
-void mei_watchdog_register(struct mei_device *dev);
+int mei_watchdog_register(struct mei_device *dev);
/*
* mei_watchdog_unregister - Unregistering watchdog interface
* @dev - mei device
@@ -535,10 +631,22 @@ void mei_watchdog_unregister(struct mei_device *dev);
* Register Access Function
*/
+
static inline void mei_hw_config(struct mei_device *dev)
{
dev->ops->hw_config(dev);
}
+
+static inline enum mei_pg_state mei_pg_state(struct mei_device *dev)
+{
+ return dev->ops->pg_state(dev);
+}
+
+static inline bool mei_pg_is_enabled(struct mei_device *dev)
+{
+ return dev->ops->pg_is_enabled(dev);
+}
+
static inline int mei_hw_reset(struct mei_device *dev, bool enable)
{
return dev->ops->hw_reset(dev, enable);
@@ -611,6 +719,17 @@ static inline int mei_count_full_read_slots(struct mei_device *dev)
return dev->ops->rdbuf_full_slots(dev);
}
+int mei_fw_status(struct mei_device *dev, struct mei_fw_status *fw_status);
+
+#define FW_STS_FMT "%08X %08X"
+#define FW_STS_PRM(fw_status) \
+ (fw_status).count > 0 ? (fw_status).status[0] : 0xDEADBEEF, \
+ (fw_status).count > 1 ? (fw_status).status[1] : 0xDEADBEEF
+
+bool mei_hbuf_acquire(struct mei_device *dev);
+
+bool mei_write_is_idle(struct mei_device *dev);
+
#if IS_ENABLED(CONFIG_DEBUG_FS)
int mei_dbgfs_register(struct mei_device *dev, const char *name);
void mei_dbgfs_deregister(struct mei_device *dev);
@@ -625,9 +744,9 @@ static inline void mei_dbgfs_deregister(struct mei_device *dev) {}
int mei_register(struct mei_device *dev);
void mei_deregister(struct mei_device *dev);
-#define MEI_HDR_FMT "hdr:host=%02d me=%02d len=%d comp=%1d"
+#define MEI_HDR_FMT "hdr:host=%02d me=%02d len=%d internal=%1d comp=%1d"
#define MEI_HDR_PRM(hdr) \
(hdr)->host_addr, (hdr)->me_addr, \
- (hdr)->length, (hdr)->msg_complete
+ (hdr)->length, (hdr)->internal, (hdr)->msg_complete
#endif
diff --git a/drivers/misc/mei/nfc.c b/drivers/misc/mei/nfc.c
index d0c6907dfd9..3095fc514a6 100644
--- a/drivers/misc/mei/nfc.c
+++ b/drivers/misc/mei/nfc.c
@@ -92,7 +92,7 @@ struct mei_nfc_hci_hdr {
* @cl: NFC host client
* @cl_info: NFC info host client
* @init_work: perform connection to the info client
- * @fw_ivn: NFC Intervace Version Number
+ * @fw_ivn: NFC Interface Version Number
* @vendor_id: NFC manufacturer ID
* @radio_type: NFC radio type
*/
@@ -163,7 +163,7 @@ static int mei_nfc_build_bus_name(struct mei_nfc_dev *ndev)
return 0;
default:
- dev_err(&dev->pdev->dev, "Unknow radio type 0x%x\n",
+ dev_err(&dev->pdev->dev, "Unknown radio type 0x%x\n",
ndev->radio_type);
return -EINVAL;
@@ -175,14 +175,14 @@ static int mei_nfc_build_bus_name(struct mei_nfc_dev *ndev)
ndev->bus_name = "pn544";
return 0;
default:
- dev_err(&dev->pdev->dev, "Unknow radio type 0x%x\n",
+ dev_err(&dev->pdev->dev, "Unknown radio type 0x%x\n",
ndev->radio_type);
return -EINVAL;
}
default:
- dev_err(&dev->pdev->dev, "Unknow vendor ID 0x%x\n",
+ dev_err(&dev->pdev->dev, "Unknown vendor ID 0x%x\n",
ndev->vendor_id);
return -EINVAL;
@@ -364,7 +364,7 @@ static int mei_nfc_send(struct mei_cl_device *cldev, u8 *buf, size_t length)
if (!wait_event_interruptible_timeout(ndev->send_wq,
ndev->recv_req_id == ndev->req_id, HZ)) {
dev_err(&dev->pdev->dev, "NFC MEI command timeout\n");
- err = -ETIMEDOUT;
+ err = -ETIME;
} else {
ndev->req_id++;
}
@@ -428,7 +428,7 @@ static void mei_nfc_init(struct work_struct *work)
mutex_unlock(&dev->device_lock);
if (mei_nfc_if_version(ndev) < 0) {
- dev_err(&dev->pdev->dev, "Could not get the NFC interfave version");
+ dev_err(&dev->pdev->dev, "Could not get the NFC interface version");
goto err;
}
@@ -469,7 +469,9 @@ static void mei_nfc_init(struct work_struct *work)
return;
err:
+ mutex_lock(&dev->device_lock);
mei_nfc_free(ndev);
+ mutex_unlock(&dev->device_lock);
return;
}
@@ -481,12 +483,15 @@ int mei_nfc_host_init(struct mei_device *dev)
struct mei_cl *cl_info, *cl = NULL;
int i, ret;
- /* already initialzed */
+ /* already initialized */
if (ndev->cl_info)
return 0;
- cl_info = mei_cl_allocate(dev);
- cl = mei_cl_allocate(dev);
+ ndev->cl_info = mei_cl_allocate(dev);
+ ndev->cl = mei_cl_allocate(dev);
+
+ cl = ndev->cl;
+ cl_info = ndev->cl_info;
if (!cl || !cl_info) {
ret = -ENOMEM;
@@ -497,7 +502,7 @@ int mei_nfc_host_init(struct mei_device *dev)
i = mei_me_cl_by_uuid(dev, &mei_nfc_info_guid);
if (i < 0) {
dev_info(&dev->pdev->dev, "nfc: failed to find the client\n");
- ret = -ENOENT;
+ ret = -ENOTTY;
goto err;
}
@@ -515,7 +520,7 @@ int mei_nfc_host_init(struct mei_device *dev)
i = mei_me_cl_by_uuid(dev, &mei_nfc_guid);
if (i < 0) {
dev_info(&dev->pdev->dev, "nfc: failed to find the client\n");
- ret = -ENOENT;
+ ret = -ENOTTY;
goto err;
}
@@ -527,10 +532,9 @@ int mei_nfc_host_init(struct mei_device *dev)
cl->device_uuid = mei_nfc_guid;
+
list_add_tail(&cl->device_link, &dev->device_list);
- ndev->cl_info = cl_info;
- ndev->cl = cl;
ndev->req_id = 1;
INIT_WORK(&ndev->init_work, mei_nfc_init);
@@ -545,12 +549,10 @@ err:
return ret;
}
-void mei_nfc_host_exit(void)
+void mei_nfc_host_exit(struct mei_device *dev)
{
struct mei_nfc_dev *ndev = &nfc_dev;
+ cancel_work_sync(&ndev->init_work);
+}
- if (ndev->cl && ndev->cl->device)
- mei_cl_remove_device(ndev->cl->device);
- mei_nfc_free(ndev);
-}
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
index 1b3844e8237..1b46c64a649 100644
--- a/drivers/misc/mei/pci-me.c
+++ b/drivers/misc/mei/pci-me.c
@@ -13,9 +13,6 @@
* more details.
*
*/
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
@@ -27,7 +24,6 @@
#include <linux/aio.h>
#include <linux/pci.h>
#include <linux/poll.h>
-#include <linux/init.h>
#include <linux/ioctl.h>
#include <linux/cdev.h>
#include <linux/sched.h>
@@ -37,47 +33,55 @@
#include <linux/interrupt.h>
#include <linux/miscdevice.h>
+#include <linux/pm_runtime.h>
+
#include <linux/mei.h>
#include "mei_dev.h"
-#include "hw-me.h"
#include "client.h"
+#include "hw-me-regs.h"
+#include "hw-me.h"
/* mei_pci_tbl - PCI Device ID Table */
-static DEFINE_PCI_DEVICE_TABLE(mei_me_pci_tbl) = {
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82946GZ)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G35)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82Q965)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G965)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82GM965)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82GME965)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82Q35)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82G33)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82Q33)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82X38)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_3200)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_6)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_7)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_8)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_9)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_10)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_1)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_2)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_3)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_4)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_1)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_2)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_3)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_4)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_IBXPK_1)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_IBXPK_2)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_CPT_1)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PBG_1)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_1)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_2)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_3)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_LPT)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_LPT_LP)},
+static const struct pci_device_id mei_me_pci_tbl[] = {
+ {MEI_PCI_DEVICE(MEI_DEV_ID_82946GZ, mei_me_legacy_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_82G35, mei_me_legacy_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_82Q965, mei_me_legacy_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_82G965, mei_me_legacy_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_82GM965, mei_me_legacy_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_82GME965, mei_me_legacy_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82Q35, mei_me_legacy_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82G33, mei_me_legacy_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82Q33, mei_me_legacy_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82X38, mei_me_legacy_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_3200, mei_me_legacy_cfg)},
+
+ {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_6, mei_me_legacy_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_7, mei_me_legacy_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_8, mei_me_legacy_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_9, mei_me_legacy_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_10, mei_me_legacy_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_1, mei_me_legacy_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_2, mei_me_legacy_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_3, mei_me_legacy_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_4, mei_me_legacy_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_1, mei_me_ich_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_2, mei_me_ich_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_3, mei_me_ich_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_4, mei_me_ich_cfg)},
+
+ {MEI_PCI_DEVICE(MEI_DEV_ID_IBXPK_1, mei_me_pch_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_IBXPK_2, mei_me_pch_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_CPT_1, mei_me_pch_cpt_pbg_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_PBG_1, mei_me_pch_cpt_pbg_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_1, mei_me_pch_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_2, mei_me_pch_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_3, mei_me_pch_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_H, mei_me_lpt_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_W, mei_me_lpt_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_LP, mei_me_pch_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_HR, mei_me_lpt_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP, mei_me_pch_cfg)},
/* required last entry */
{0, }
@@ -85,28 +89,33 @@ static DEFINE_PCI_DEVICE_TABLE(mei_me_pci_tbl) = {
MODULE_DEVICE_TABLE(pci, mei_me_pci_tbl);
+#ifdef CONFIG_PM_RUNTIME
+static inline void mei_me_set_pm_domain(struct mei_device *dev);
+static inline void mei_me_unset_pm_domain(struct mei_device *dev);
+#else
+static inline void mei_me_set_pm_domain(struct mei_device *dev) {}
+static inline void mei_me_unset_pm_domain(struct mei_device *dev) {}
+#endif /* CONFIG_PM_RUNTIME */
+
/**
* mei_quirk_probe - probe for devices that doesn't valid ME interface
*
* @pdev: PCI device structure
- * @ent: entry into pci_device_table
+ * @cfg: per generation config
*
* returns true if ME Interface is valid, false otherwise
*/
static bool mei_me_quirk_probe(struct pci_dev *pdev,
- const struct pci_device_id *ent)
+ const struct mei_cfg *cfg)
{
- u32 reg;
- if (ent->device == MEI_DEV_ID_PBG_1) {
- pci_read_config_dword(pdev, 0x48, &reg);
- /* make sure that bit 9 is up and bit 10 is down */
- if ((reg & 0x600) == 0x200) {
- dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n");
- return false;
- }
+ if (cfg->quirk_probe && cfg->quirk_probe(pdev)) {
+ dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n");
+ return false;
}
+
return true;
}
+
/**
* mei_probe - Device Initialization Routine
*
@@ -117,15 +126,14 @@ static bool mei_me_quirk_probe(struct pci_dev *pdev,
*/
static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
+ const struct mei_cfg *cfg = (struct mei_cfg *)(ent->driver_data);
struct mei_device *dev;
struct mei_me_hw *hw;
int err;
- if (!mei_me_quirk_probe(pdev, ent)) {
- err = -ENODEV;
- goto end;
- }
+ if (!mei_me_quirk_probe(pdev, cfg))
+ return -ENODEV;
/* enable pci dev */
err = pci_enable_device(pdev);
@@ -141,8 +149,23 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
dev_err(&pdev->dev, "failed to get pci regions.\n");
goto disable_device;
}
+
+ if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) ||
+ dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
+
+ err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (err)
+ err = dma_set_coherent_mask(&pdev->dev,
+ DMA_BIT_MASK(32));
+ }
+ if (err) {
+ dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
+ goto release_regions;
+ }
+
+
/* allocates and initializes the mei dev structure */
- dev = mei_me_dev_init(pdev);
+ dev = mei_me_dev_init(pdev, cfg);
if (!dev) {
err = -ENOMEM;
goto release_regions;
@@ -181,6 +204,9 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
goto release_irq;
}
+ pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_ME_RPM_TIMEOUT);
+ pm_runtime_use_autosuspend(&pdev->dev);
+
err = mei_register(dev);
if (err)
goto release_irq;
@@ -189,13 +215,24 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
schedule_delayed_work(&dev->timer_work, HZ);
- pr_debug("initialization successful.\n");
+ /*
+ * For not wake-able HW runtime pm framework
+ * can't be used on pci device level.
+ * Use domain runtime pm callbacks instead.
+ */
+ if (!pci_dev_run_wake(pdev))
+ mei_me_set_pm_domain(dev);
+
+ if (mei_pg_is_enabled(dev))
+ pm_runtime_put_noidle(&pdev->dev);
+
+ dev_dbg(&pdev->dev, "initialization successful.\n");
return 0;
release_irq:
+ mei_cancel_work(dev);
mei_disable_interrupts(dev);
- flush_scheduled_work();
free_irq(pdev->irq, dev);
disable_msi:
pci_disable_msi(pdev);
@@ -228,18 +265,23 @@ static void mei_me_remove(struct pci_dev *pdev)
if (!dev)
return;
+ if (mei_pg_is_enabled(dev))
+ pm_runtime_get_noresume(&pdev->dev);
+
hw = to_me_hw(dev);
- dev_err(&pdev->dev, "stop\n");
+ dev_dbg(&pdev->dev, "stop\n");
mei_stop(dev);
+ if (!pci_dev_run_wake(pdev))
+ mei_me_unset_pm_domain(dev);
+
/* disable interrupts */
mei_disable_interrupts(dev);
free_irq(pdev->irq, dev);
pci_disable_msi(pdev);
- pci_set_drvdata(pdev, NULL);
if (hw->mem_addr)
pci_iounmap(pdev, hw->mem_addr);
@@ -253,7 +295,7 @@ static void mei_me_remove(struct pci_dev *pdev)
}
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
static int mei_me_pci_suspend(struct device *device)
{
struct pci_dev *pdev = to_pci_dev(device);
@@ -262,7 +304,7 @@ static int mei_me_pci_suspend(struct device *device)
if (!dev)
return -ENODEV;
- dev_err(&pdev->dev, "suspend\n");
+ dev_dbg(&pdev->dev, "suspend\n");
mei_stop(dev);
@@ -304,18 +346,125 @@ static int mei_me_pci_resume(struct device *device)
return err;
}
- mutex_lock(&dev->device_lock);
- dev->dev_state = MEI_DEV_POWER_UP;
- mei_clear_interrupts(dev);
- mei_reset(dev, 1);
- mutex_unlock(&dev->device_lock);
+ err = mei_restart(dev);
+ if (err)
+ return err;
/* Start timer if stopped in suspend */
schedule_delayed_work(&dev->timer_work, HZ);
- return err;
+ return 0;
}
-static SIMPLE_DEV_PM_OPS(mei_me_pm_ops, mei_me_pci_suspend, mei_me_pci_resume);
+#endif /* CONFIG_PM_SLEEP */
+
+#ifdef CONFIG_PM_RUNTIME
+static int mei_me_pm_runtime_idle(struct device *device)
+{
+ struct pci_dev *pdev = to_pci_dev(device);
+ struct mei_device *dev;
+
+ dev_dbg(&pdev->dev, "rpm: me: runtime_idle\n");
+
+ dev = pci_get_drvdata(pdev);
+ if (!dev)
+ return -ENODEV;
+ if (mei_write_is_idle(dev))
+ pm_schedule_suspend(device, MEI_ME_RPM_TIMEOUT * 2);
+
+ return -EBUSY;
+}
+
+static int mei_me_pm_runtime_suspend(struct device *device)
+{
+ struct pci_dev *pdev = to_pci_dev(device);
+ struct mei_device *dev;
+ int ret;
+
+ dev_dbg(&pdev->dev, "rpm: me: runtime suspend\n");
+
+ dev = pci_get_drvdata(pdev);
+ if (!dev)
+ return -ENODEV;
+
+ mutex_lock(&dev->device_lock);
+
+ if (mei_write_is_idle(dev))
+ ret = mei_me_pg_set_sync(dev);
+ else
+ ret = -EAGAIN;
+
+ mutex_unlock(&dev->device_lock);
+
+ dev_dbg(&pdev->dev, "rpm: me: runtime suspend ret=%d\n", ret);
+
+ return ret;
+}
+
+static int mei_me_pm_runtime_resume(struct device *device)
+{
+ struct pci_dev *pdev = to_pci_dev(device);
+ struct mei_device *dev;
+ int ret;
+
+ dev_dbg(&pdev->dev, "rpm: me: runtime resume\n");
+
+ dev = pci_get_drvdata(pdev);
+ if (!dev)
+ return -ENODEV;
+
+ mutex_lock(&dev->device_lock);
+
+ ret = mei_me_pg_unset_sync(dev);
+
+ mutex_unlock(&dev->device_lock);
+
+ dev_dbg(&pdev->dev, "rpm: me: runtime resume ret = %d\n", ret);
+
+ return ret;
+}
+
+/**
+ * mei_me_set_pm_domain - fill and set pm domian stucture for device
+ *
+ * @dev: mei_device
+ */
+static inline void mei_me_set_pm_domain(struct mei_device *dev)
+{
+ struct pci_dev *pdev = dev->pdev;
+
+ if (pdev->dev.bus && pdev->dev.bus->pm) {
+ dev->pg_domain.ops = *pdev->dev.bus->pm;
+
+ dev->pg_domain.ops.runtime_suspend = mei_me_pm_runtime_suspend;
+ dev->pg_domain.ops.runtime_resume = mei_me_pm_runtime_resume;
+ dev->pg_domain.ops.runtime_idle = mei_me_pm_runtime_idle;
+
+ pdev->dev.pm_domain = &dev->pg_domain;
+ }
+}
+
+/**
+ * mei_me_unset_pm_domain - clean pm domian stucture for device
+ *
+ * @dev: mei_device
+ */
+static inline void mei_me_unset_pm_domain(struct mei_device *dev)
+{
+ /* stop using pm callbacks if any */
+ dev->pdev->dev.pm_domain = NULL;
+}
+#endif /* CONFIG_PM_RUNTIME */
+
+#ifdef CONFIG_PM
+static const struct dev_pm_ops mei_me_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(mei_me_pci_suspend,
+ mei_me_pci_resume)
+ SET_RUNTIME_PM_OPS(
+ mei_me_pm_runtime_suspend,
+ mei_me_pm_runtime_resume,
+ mei_me_pm_runtime_idle)
+};
+
#define MEI_ME_PM_OPS (&mei_me_pm_ops)
#else
#define MEI_ME_PM_OPS NULL
diff --git a/drivers/misc/mei/pci-txe.c b/drivers/misc/mei/pci-txe.c
new file mode 100644
index 00000000000..2343c6236df
--- /dev/null
+++ b/drivers/misc/mei/pci-txe.c
@@ -0,0 +1,436 @@
+/*
+ *
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ * Copyright (c) 2013-2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/uuid.h>
+#include <linux/jiffies.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/pm_runtime.h>
+
+#include <linux/mei.h>
+
+
+#include "mei_dev.h"
+#include "hw-txe.h"
+
+static const struct pci_device_id mei_txe_pci_tbl[] = {
+ {MEI_PCI_DEVICE(0x0F18, mei_txe_cfg)}, /* Baytrail */
+ {0, }
+};
+MODULE_DEVICE_TABLE(pci, mei_txe_pci_tbl);
+
+#ifdef CONFIG_PM_RUNTIME
+static inline void mei_txe_set_pm_domain(struct mei_device *dev);
+static inline void mei_txe_unset_pm_domain(struct mei_device *dev);
+#else
+static inline void mei_txe_set_pm_domain(struct mei_device *dev) {}
+static inline void mei_txe_unset_pm_domain(struct mei_device *dev) {}
+#endif /* CONFIG_PM_RUNTIME */
+
+static void mei_txe_pci_iounmap(struct pci_dev *pdev, struct mei_txe_hw *hw)
+{
+ int i;
+ for (i = SEC_BAR; i < NUM_OF_MEM_BARS; i++) {
+ if (hw->mem_addr[i]) {
+ pci_iounmap(pdev, hw->mem_addr[i]);
+ hw->mem_addr[i] = NULL;
+ }
+ }
+}
+/**
+ * mei_probe - Device Initialization Routine
+ *
+ * @pdev: PCI device structure
+ * @ent: entry in mei_txe_pci_tbl
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int mei_txe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ const struct mei_cfg *cfg = (struct mei_cfg *)(ent->driver_data);
+ struct mei_device *dev;
+ struct mei_txe_hw *hw;
+ int err;
+ int i;
+
+ /* enable pci dev */
+ err = pci_enable_device(pdev);
+ if (err) {
+ dev_err(&pdev->dev, "failed to enable pci device.\n");
+ goto end;
+ }
+ /* set PCI host mastering */
+ pci_set_master(pdev);
+ /* pci request regions for mei driver */
+ err = pci_request_regions(pdev, KBUILD_MODNAME);
+ if (err) {
+ dev_err(&pdev->dev, "failed to get pci regions.\n");
+ goto disable_device;
+ }
+
+ err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
+ if (err) {
+ err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (err) {
+ dev_err(&pdev->dev, "No suitable DMA available.\n");
+ goto release_regions;
+ }
+ }
+
+ /* allocates and initializes the mei dev structure */
+ dev = mei_txe_dev_init(pdev, cfg);
+ if (!dev) {
+ err = -ENOMEM;
+ goto release_regions;
+ }
+ hw = to_txe_hw(dev);
+
+ /* mapping IO device memory */
+ for (i = SEC_BAR; i < NUM_OF_MEM_BARS; i++) {
+ hw->mem_addr[i] = pci_iomap(pdev, i, 0);
+ if (!hw->mem_addr[i]) {
+ dev_err(&pdev->dev, "mapping I/O device memory failure.\n");
+ err = -ENOMEM;
+ goto free_device;
+ }
+ }
+
+
+ pci_enable_msi(pdev);
+
+ /* clear spurious interrupts */
+ mei_clear_interrupts(dev);
+
+ /* request and enable interrupt */
+ if (pci_dev_msi_enabled(pdev))
+ err = request_threaded_irq(pdev->irq,
+ NULL,
+ mei_txe_irq_thread_handler,
+ IRQF_ONESHOT, KBUILD_MODNAME, dev);
+ else
+ err = request_threaded_irq(pdev->irq,
+ mei_txe_irq_quick_handler,
+ mei_txe_irq_thread_handler,
+ IRQF_SHARED, KBUILD_MODNAME, dev);
+ if (err) {
+ dev_err(&pdev->dev, "mei: request_threaded_irq failure. irq = %d\n",
+ pdev->irq);
+ goto free_device;
+ }
+
+ if (mei_start(dev)) {
+ dev_err(&pdev->dev, "init hw failure.\n");
+ err = -ENODEV;
+ goto release_irq;
+ }
+
+ pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_TXI_RPM_TIMEOUT);
+ pm_runtime_use_autosuspend(&pdev->dev);
+
+ err = mei_register(dev);
+ if (err)
+ goto release_irq;
+
+ pci_set_drvdata(pdev, dev);
+
+ /*
+ * For not wake-able HW runtime pm framework
+ * can't be used on pci device level.
+ * Use domain runtime pm callbacks instead.
+ */
+ if (!pci_dev_run_wake(pdev))
+ mei_txe_set_pm_domain(dev);
+
+ pm_runtime_put_noidle(&pdev->dev);
+
+ return 0;
+
+release_irq:
+
+ mei_cancel_work(dev);
+
+ /* disable interrupts */
+ mei_disable_interrupts(dev);
+
+ free_irq(pdev->irq, dev);
+ pci_disable_msi(pdev);
+
+free_device:
+ mei_txe_pci_iounmap(pdev, hw);
+
+ kfree(dev);
+release_regions:
+ pci_release_regions(pdev);
+disable_device:
+ pci_disable_device(pdev);
+end:
+ dev_err(&pdev->dev, "initialization failed.\n");
+ return err;
+}
+
+/**
+ * mei_remove - Device Removal Routine
+ *
+ * @pdev: PCI device structure
+ *
+ * mei_remove is called by the PCI subsystem to alert the driver
+ * that it should release a PCI device.
+ */
+static void mei_txe_remove(struct pci_dev *pdev)
+{
+ struct mei_device *dev;
+ struct mei_txe_hw *hw;
+
+ dev = pci_get_drvdata(pdev);
+ if (!dev) {
+ dev_err(&pdev->dev, "mei: dev =NULL\n");
+ return;
+ }
+
+ pm_runtime_get_noresume(&pdev->dev);
+
+ hw = to_txe_hw(dev);
+
+ mei_stop(dev);
+
+ if (!pci_dev_run_wake(pdev))
+ mei_txe_unset_pm_domain(dev);
+
+ /* disable interrupts */
+ mei_disable_interrupts(dev);
+ free_irq(pdev->irq, dev);
+ pci_disable_msi(pdev);
+
+ pci_set_drvdata(pdev, NULL);
+
+ mei_txe_pci_iounmap(pdev, hw);
+
+ mei_deregister(dev);
+
+ kfree(dev);
+
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+}
+
+
+#ifdef CONFIG_PM_SLEEP
+static int mei_txe_pci_suspend(struct device *device)
+{
+ struct pci_dev *pdev = to_pci_dev(device);
+ struct mei_device *dev = pci_get_drvdata(pdev);
+
+ if (!dev)
+ return -ENODEV;
+
+ dev_dbg(&pdev->dev, "suspend\n");
+
+ mei_stop(dev);
+
+ mei_disable_interrupts(dev);
+
+ free_irq(pdev->irq, dev);
+ pci_disable_msi(pdev);
+
+ return 0;
+}
+
+static int mei_txe_pci_resume(struct device *device)
+{
+ struct pci_dev *pdev = to_pci_dev(device);
+ struct mei_device *dev;
+ int err;
+
+ dev = pci_get_drvdata(pdev);
+ if (!dev)
+ return -ENODEV;
+
+ pci_enable_msi(pdev);
+
+ mei_clear_interrupts(dev);
+
+ /* request and enable interrupt */
+ if (pci_dev_msi_enabled(pdev))
+ err = request_threaded_irq(pdev->irq,
+ NULL,
+ mei_txe_irq_thread_handler,
+ IRQF_ONESHOT, KBUILD_MODNAME, dev);
+ else
+ err = request_threaded_irq(pdev->irq,
+ mei_txe_irq_quick_handler,
+ mei_txe_irq_thread_handler,
+ IRQF_SHARED, KBUILD_MODNAME, dev);
+ if (err) {
+ dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n",
+ pdev->irq);
+ return err;
+ }
+
+ err = mei_restart(dev);
+
+ return err;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+#ifdef CONFIG_PM_RUNTIME
+static int mei_txe_pm_runtime_idle(struct device *device)
+{
+ struct pci_dev *pdev = to_pci_dev(device);
+ struct mei_device *dev;
+
+ dev_dbg(&pdev->dev, "rpm: txe: runtime_idle\n");
+
+ dev = pci_get_drvdata(pdev);
+ if (!dev)
+ return -ENODEV;
+ if (mei_write_is_idle(dev))
+ pm_schedule_suspend(device, MEI_TXI_RPM_TIMEOUT * 2);
+
+ return -EBUSY;
+}
+static int mei_txe_pm_runtime_suspend(struct device *device)
+{
+ struct pci_dev *pdev = to_pci_dev(device);
+ struct mei_device *dev;
+ int ret;
+
+ dev_dbg(&pdev->dev, "rpm: txe: runtime suspend\n");
+
+ dev = pci_get_drvdata(pdev);
+ if (!dev)
+ return -ENODEV;
+
+ mutex_lock(&dev->device_lock);
+
+ if (mei_write_is_idle(dev))
+ ret = mei_txe_aliveness_set_sync(dev, 0);
+ else
+ ret = -EAGAIN;
+
+ /*
+ * If everything is okay we're about to enter PCI low
+ * power state (D3) therefor we need to disable the
+ * interrupts towards host.
+ * However if device is not wakeable we do not enter
+ * D-low state and we need to keep the interrupt kicking
+ */
+ if (!ret && pci_dev_run_wake(pdev))
+ mei_disable_interrupts(dev);
+
+ dev_dbg(&pdev->dev, "rpm: txe: runtime suspend ret=%d\n", ret);
+
+ mutex_unlock(&dev->device_lock);
+ return ret;
+}
+
+static int mei_txe_pm_runtime_resume(struct device *device)
+{
+ struct pci_dev *pdev = to_pci_dev(device);
+ struct mei_device *dev;
+ int ret;
+
+ dev_dbg(&pdev->dev, "rpm: txe: runtime resume\n");
+
+ dev = pci_get_drvdata(pdev);
+ if (!dev)
+ return -ENODEV;
+
+ mutex_lock(&dev->device_lock);
+
+ mei_enable_interrupts(dev);
+
+ ret = mei_txe_aliveness_set_sync(dev, 1);
+
+ mutex_unlock(&dev->device_lock);
+
+ dev_dbg(&pdev->dev, "rpm: txe: runtime resume ret = %d\n", ret);
+
+ return ret;
+}
+
+/**
+ * mei_txe_set_pm_domain - fill and set pm domian stucture for device
+ *
+ * @dev: mei_device
+ */
+static inline void mei_txe_set_pm_domain(struct mei_device *dev)
+{
+ struct pci_dev *pdev = dev->pdev;
+
+ if (pdev->dev.bus && pdev->dev.bus->pm) {
+ dev->pg_domain.ops = *pdev->dev.bus->pm;
+
+ dev->pg_domain.ops.runtime_suspend = mei_txe_pm_runtime_suspend;
+ dev->pg_domain.ops.runtime_resume = mei_txe_pm_runtime_resume;
+ dev->pg_domain.ops.runtime_idle = mei_txe_pm_runtime_idle;
+
+ pdev->dev.pm_domain = &dev->pg_domain;
+ }
+}
+
+/**
+ * mei_txe_unset_pm_domain - clean pm domian stucture for device
+ *
+ * @dev: mei_device
+ */
+static inline void mei_txe_unset_pm_domain(struct mei_device *dev)
+{
+ /* stop using pm callbacks if any */
+ dev->pdev->dev.pm_domain = NULL;
+}
+#endif /* CONFIG_PM_RUNTIME */
+
+#ifdef CONFIG_PM
+static const struct dev_pm_ops mei_txe_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(mei_txe_pci_suspend,
+ mei_txe_pci_resume)
+ SET_RUNTIME_PM_OPS(
+ mei_txe_pm_runtime_suspend,
+ mei_txe_pm_runtime_resume,
+ mei_txe_pm_runtime_idle)
+};
+
+#define MEI_TXE_PM_OPS (&mei_txe_pm_ops)
+#else
+#define MEI_TXE_PM_OPS NULL
+#endif /* CONFIG_PM */
+
+/*
+ * PCI driver structure
+ */
+static struct pci_driver mei_txe_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = mei_txe_pci_tbl,
+ .probe = mei_txe_probe,
+ .remove = mei_txe_remove,
+ .shutdown = mei_txe_remove,
+ .driver.pm = MEI_TXE_PM_OPS,
+};
+
+module_pci_driver(mei_txe_driver);
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) Trusted Execution Environment Interface");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/misc/mei/wd.c b/drivers/misc/mei/wd.c
index b8921432e89..a84a664dfcc 100644
--- a/drivers/misc/mei/wd.c
+++ b/drivers/misc/mei/wd.c
@@ -25,7 +25,6 @@
#include "mei_dev.h"
#include "hbm.h"
-#include "hw-me.h"
#include "client.h"
static const u8 mei_start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 };
@@ -53,14 +52,14 @@ static void mei_wd_set_start_timeout(struct mei_device *dev, u16 timeout)
*
* @dev: the device structure
*
- * returns -ENENT if wd client cannot be found
+ * returns -ENOTTY if wd client cannot be found
* -EIO if write has failed
* 0 on success
*/
int mei_wd_host_init(struct mei_device *dev)
{
struct mei_cl *cl = &dev->wd_cl;
- int i;
+ int id;
int ret;
mei_cl_init(cl, dev);
@@ -70,32 +69,35 @@ int mei_wd_host_init(struct mei_device *dev)
/* check for valid client id */
- i = mei_me_cl_by_uuid(dev, &mei_wd_guid);
- if (i < 0) {
+ id = mei_me_cl_by_uuid(dev, &mei_wd_guid);
+ if (id < 0) {
dev_info(&dev->pdev->dev, "wd: failed to find the client\n");
- return -ENOENT;
+ return -ENOTTY;
}
- cl->me_client_id = dev->me_clients[i].client_id;
+ cl->me_client_id = dev->me_clients[id].client_id;
ret = mei_cl_link(cl, MEI_WD_HOST_CLIENT_ID);
if (ret < 0) {
dev_info(&dev->pdev->dev, "wd: failed link client\n");
- return -ENOENT;
+ return ret;
}
- cl->state = MEI_FILE_CONNECTING;
+ ret = mei_cl_connect(cl, NULL);
- if (mei_hbm_cl_connect_req(dev, cl)) {
- dev_err(&dev->pdev->dev, "wd: failed to connect to the client\n");
- cl->state = MEI_FILE_DISCONNECTED;
- cl->host_client_id = 0;
- return -EIO;
+ if (ret) {
+ dev_err(&dev->pdev->dev, "wd: failed to connect = %d\n", ret);
+ mei_cl_unlink(cl);
+ return ret;
}
- cl->timer_count = MEI_CONNECT_TIMEOUT;
- return 0;
+ ret = mei_watchdog_register(dev);
+ if (ret) {
+ mei_cl_disconnect(cl);
+ mei_cl_unlink(cl);
+ }
+ return ret;
}
/**
@@ -106,24 +108,42 @@ int mei_wd_host_init(struct mei_device *dev)
* returns 0 if success,
* -EIO when message send fails
* -EINVAL when invalid message is to be sent
+ * -ENODEV on flow control failure
*/
int mei_wd_send(struct mei_device *dev)
{
+ struct mei_cl *cl = &dev->wd_cl;
struct mei_msg_hdr hdr;
+ int ret;
- hdr.host_addr = dev->wd_cl.host_client_id;
- hdr.me_addr = dev->wd_cl.me_client_id;
+ hdr.host_addr = cl->host_client_id;
+ hdr.me_addr = cl->me_client_id;
hdr.msg_complete = 1;
hdr.reserved = 0;
+ hdr.internal = 0;
if (!memcmp(dev->wd_data, mei_start_wd_params, MEI_WD_HDR_SIZE))
hdr.length = MEI_WD_START_MSG_SIZE;
else if (!memcmp(dev->wd_data, mei_stop_wd_params, MEI_WD_HDR_SIZE))
hdr.length = MEI_WD_STOP_MSG_SIZE;
- else
+ else {
+ dev_err(&dev->pdev->dev, "wd: invalid message is to be sent, aborting\n");
return -EINVAL;
+ }
+
+ ret = mei_write_message(dev, &hdr, dev->wd_data);
+ if (ret) {
+ dev_err(&dev->pdev->dev, "wd: write message failed\n");
+ return ret;
+ }
- return mei_write_message(dev, &hdr, dev->wd_data);
+ ret = mei_cl_flow_ctrl_reduce(cl);
+ if (ret) {
+ dev_err(&dev->pdev->dev, "wd: flow_ctrl_reduce failed.\n");
+ return ret;
+ }
+
+ return 0;
}
/**
@@ -132,9 +152,11 @@ int mei_wd_send(struct mei_device *dev)
* @dev: the device structure
* @preserve: indicate if to keep the timeout value
*
- * returns 0 if success,
- * -EIO when message send fails
+ * returns 0 if success
+ * on error:
+ * -EIO when message send fails
* -EINVAL when invalid message is to be sent
+ * -ETIME on message timeout
*/
int mei_wd_stop(struct mei_device *dev)
{
@@ -150,20 +172,12 @@ int mei_wd_stop(struct mei_device *dev)
ret = mei_cl_flow_ctrl_creds(&dev->wd_cl);
if (ret < 0)
- goto out;
-
- if (ret && dev->hbuf_is_ready) {
- ret = 0;
- dev->hbuf_is_ready = false;
-
- if (!mei_wd_send(dev)) {
- ret = mei_cl_flow_ctrl_reduce(&dev->wd_cl);
- if (ret)
- goto out;
- } else {
- dev_err(&dev->pdev->dev, "wd: send stop failed\n");
- }
+ goto err;
+ if (ret && mei_hbuf_acquire(dev)) {
+ ret = mei_wd_send(dev);
+ if (ret)
+ goto err;
dev->wd_pending = false;
} else {
dev->wd_pending = true;
@@ -171,21 +185,21 @@ int mei_wd_stop(struct mei_device *dev)
mutex_unlock(&dev->device_lock);
- ret = wait_event_interruptible_timeout(dev->wait_stop_wd,
- dev->wd_state == MEI_WD_IDLE,
- msecs_to_jiffies(MEI_WD_STOP_TIMEOUT));
+ ret = wait_event_timeout(dev->wait_stop_wd,
+ dev->wd_state == MEI_WD_IDLE,
+ msecs_to_jiffies(MEI_WD_STOP_TIMEOUT));
mutex_lock(&dev->device_lock);
- if (dev->wd_state == MEI_WD_IDLE) {
- dev_dbg(&dev->pdev->dev, "wd: stop completed ret=%d.\n", ret);
- ret = 0;
- } else {
- if (!ret)
- ret = -ETIMEDOUT;
+ if (dev->wd_state != MEI_WD_IDLE) {
+ /* timeout */
+ ret = -ETIME;
dev_warn(&dev->pdev->dev,
"wd: stop failed to complete ret=%d.\n", ret);
+ goto err;
}
-
-out:
+ dev_dbg(&dev->pdev->dev, "wd: stop completed after %u msec\n",
+ MEI_WD_STOP_TIMEOUT - jiffies_to_msecs(ret));
+ return 0;
+err:
return ret;
}
@@ -259,8 +273,8 @@ static int mei_wd_ops_stop(struct watchdog_device *wd_dev)
*/
static int mei_wd_ops_ping(struct watchdog_device *wd_dev)
{
- int ret = 0;
struct mei_device *dev;
+ int ret;
dev = watchdog_get_drvdata(wd_dev);
if (!dev)
@@ -276,25 +290,18 @@ static int mei_wd_ops_ping(struct watchdog_device *wd_dev)
dev->wd_state = MEI_WD_RUNNING;
+ ret = mei_cl_flow_ctrl_creds(&dev->wd_cl);
+ if (ret < 0)
+ goto end;
/* Check if we can send the ping to HW*/
- if (dev->hbuf_is_ready && mei_cl_flow_ctrl_creds(&dev->wd_cl) > 0) {
+ if (ret && mei_hbuf_acquire(dev)) {
- dev->hbuf_is_ready = false;
dev_dbg(&dev->pdev->dev, "wd: sending ping\n");
- if (mei_wd_send(dev)) {
- dev_err(&dev->pdev->dev, "wd: send failed.\n");
- ret = -EIO;
- goto end;
- }
-
- if (mei_cl_flow_ctrl_reduce(&dev->wd_cl)) {
- dev_err(&dev->pdev->dev,
- "wd: mei_cl_flow_ctrl_reduce() failed.\n");
- ret = -EIO;
+ ret = mei_wd_send(dev);
+ if (ret)
goto end;
- }
-
+ dev->wd_pending = false;
} else {
dev->wd_pending = true;
}
@@ -362,17 +369,25 @@ static struct watchdog_device amt_wd_dev = {
};
-void mei_watchdog_register(struct mei_device *dev)
+int mei_watchdog_register(struct mei_device *dev)
{
- if (watchdog_register_device(&amt_wd_dev)) {
- dev_err(&dev->pdev->dev,
- "wd: unable to register watchdog device.\n");
- return;
+
+ int ret;
+
+ /* unlock to perserve correct locking order */
+ mutex_unlock(&dev->device_lock);
+ ret = watchdog_register_device(&amt_wd_dev);
+ mutex_lock(&dev->device_lock);
+ if (ret) {
+ dev_err(&dev->pdev->dev, "wd: unable to register watchdog device = %d.\n",
+ ret);
+ return ret;
}
dev_dbg(&dev->pdev->dev,
"wd: successfully register watchdog interface.\n");
watchdog_set_drvdata(&amt_wd_dev, dev);
+ return 0;
}
void mei_watchdog_unregister(struct mei_device *dev)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 11:40:36 +0000