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-rw-r--r--drivers/remoteproc/Kconfig49
-rw-r--r--drivers/remoteproc/Makefile2
-rw-r--r--drivers/remoteproc/da8xx_remoteproc.c310
-rw-r--r--drivers/remoteproc/omap_remoteproc.c13
-rw-r--r--drivers/remoteproc/remoteproc_core.c425
-rw-r--r--drivers/remoteproc/remoteproc_debugfs.c88
-rw-r--r--drivers/remoteproc/remoteproc_elf_loader.c104
-rw-r--r--drivers/remoteproc/remoteproc_internal.h16
-rw-r--r--drivers/remoteproc/remoteproc_virtio.c107
-rw-r--r--drivers/remoteproc/ste_modem_rproc.c342
10 files changed, 1268 insertions, 188 deletions
diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index f8d818abf98..5e343bab945 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -1,18 +1,22 @@
-menu "Remoteproc drivers (EXPERIMENTAL)"
+menu "Remoteproc drivers"
# REMOTEPROC gets selected by whoever wants it
config REMOTEPROC
tristate
- depends on EXPERIMENTAL
- select FW_CONFIG
+ depends on HAS_DMA
+ select CRC32
+ select FW_LOADER
+ select VIRTIO
+ select VIRTUALIZATION
config OMAP_REMOTEPROC
tristate "OMAP remoteproc support"
- depends on EXPERIMENTAL
- depends on ARCH_OMAP4
+ depends on HAS_DMA
+ depends on ARCH_OMAP4 || SOC_OMAP5
depends on OMAP_IOMMU
select REMOTEPROC
- select OMAP_MBOX_FWK
+ select MAILBOX
+ select OMAP2PLUS_MBOX
select RPMSG
help
Say y here to support OMAP's remote processors (dual M3
@@ -27,4 +31,37 @@ config OMAP_REMOTEPROC
It's safe to say n here if you're not interested in multimedia
offloading or just want a bare minimum kernel.
+config STE_MODEM_RPROC
+ tristate "STE-Modem remoteproc support"
+ depends on HAS_DMA
+ select REMOTEPROC
+ default n
+ help
+ Say y or m here to support STE-Modem shared memory driver.
+ This can be either built-in or a loadable module.
+ If unsure say N.
+
+config DA8XX_REMOTEPROC
+ tristate "DA8xx/OMAP-L13x remoteproc support"
+ depends on ARCH_DAVINCI_DA8XX
+ select CMA if MMU
+ select REMOTEPROC
+ select RPMSG
+ help
+ Say y here to support DA8xx/OMAP-L13x remote processors via the
+ remote processor framework.
+
+ You want to say y here in order to enable AMP
+ use-cases to run on your platform (multimedia codecs are
+ offloaded to remote DSP processors using this framework).
+
+ This module controls the name of the firmware file that gets
+ loaded on the DSP. This file must reside in the /lib/firmware
+ directory. It can be specified via the module parameter
+ da8xx_fw_name=<filename>, and if not specified will default to
+ "rproc-dsp-fw".
+
+ It's safe to say n here if you're not interested in multimedia
+ offloading.
+
endmenu
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index 934ce6e2c66..ac2ff75686d 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -8,3 +8,5 @@ remoteproc-y += remoteproc_debugfs.o
remoteproc-y += remoteproc_virtio.o
remoteproc-y += remoteproc_elf_loader.o
obj-$(CONFIG_OMAP_REMOTEPROC) += omap_remoteproc.o
+obj-$(CONFIG_STE_MODEM_RPROC) += ste_modem_rproc.o
+obj-$(CONFIG_DA8XX_REMOTEPROC) += da8xx_remoteproc.o
diff --git a/drivers/remoteproc/da8xx_remoteproc.c b/drivers/remoteproc/da8xx_remoteproc.c
new file mode 100644
index 00000000000..3841b981310
--- /dev/null
+++ b/drivers/remoteproc/da8xx_remoteproc.c
@@ -0,0 +1,310 @@
+/*
+ * Remote processor machine-specific module for DA8XX
+ *
+ * Copyright (C) 2013 Texas Instruments, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ */
+
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+
+#include <mach/clock.h> /* for davinci_clk_reset_assert/deassert() */
+
+#include "remoteproc_internal.h"
+
+static char *da8xx_fw_name;
+module_param(da8xx_fw_name, charp, S_IRUGO);
+MODULE_PARM_DESC(da8xx_fw_name,
+ "\n\t\tName of DSP firmware file in /lib/firmware"
+ " (if not specified defaults to 'rproc-dsp-fw')");
+
+/*
+ * OMAP-L138 Technical References:
+ * http://www.ti.com/product/omap-l138
+ */
+#define SYSCFG_CHIPSIG0 BIT(0)
+#define SYSCFG_CHIPSIG1 BIT(1)
+#define SYSCFG_CHIPSIG2 BIT(2)
+#define SYSCFG_CHIPSIG3 BIT(3)
+#define SYSCFG_CHIPSIG4 BIT(4)
+
+/**
+ * struct da8xx_rproc - da8xx remote processor instance state
+ * @rproc: rproc handle
+ * @dsp_clk: placeholder for platform's DSP clk
+ * @ack_fxn: chip-specific ack function for ack'ing irq
+ * @irq_data: ack_fxn function parameter
+ * @chipsig: virt ptr to DSP interrupt registers (CHIPSIG & CHIPSIG_CLR)
+ * @bootreg: virt ptr to DSP boot address register (HOST1CFG)
+ * @irq: irq # used by this instance
+ */
+struct da8xx_rproc {
+ struct rproc *rproc;
+ struct clk *dsp_clk;
+ void (*ack_fxn)(struct irq_data *data);
+ struct irq_data *irq_data;
+ void __iomem *chipsig;
+ void __iomem *bootreg;
+ int irq;
+};
+
+/**
+ * handle_event() - inbound virtqueue message workqueue function
+ *
+ * This function is registered as a kernel thread and is scheduled by the
+ * kernel handler.
+ */
+static irqreturn_t handle_event(int irq, void *p)
+{
+ struct rproc *rproc = (struct rproc *)p;
+
+ /* Process incoming buffers on all our vrings */
+ rproc_vq_interrupt(rproc, 0);
+ rproc_vq_interrupt(rproc, 1);
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * da8xx_rproc_callback() - inbound virtqueue message handler
+ *
+ * This handler is invoked directly by the kernel whenever the remote
+ * core (DSP) has modified the state of a virtqueue. There is no
+ * "payload" message indicating the virtqueue index as is the case with
+ * mailbox-based implementations on OMAP4. As such, this handler "polls"
+ * each known virtqueue index for every invocation.
+ */
+static irqreturn_t da8xx_rproc_callback(int irq, void *p)
+{
+ struct rproc *rproc = (struct rproc *)p;
+ struct da8xx_rproc *drproc = (struct da8xx_rproc *)rproc->priv;
+ u32 chipsig;
+
+ chipsig = readl(drproc->chipsig);
+ if (chipsig & SYSCFG_CHIPSIG0) {
+ /* Clear interrupt level source */
+ writel(SYSCFG_CHIPSIG0, drproc->chipsig + 4);
+
+ /*
+ * ACK intr to AINTC.
+ *
+ * It has already been ack'ed by the kernel before calling
+ * this function, but since the ARM<->DSP interrupts in the
+ * CHIPSIG register are "level" instead of "pulse" variety,
+ * we need to ack it after taking down the level else we'll
+ * be called again immediately after returning.
+ */
+ drproc->ack_fxn(drproc->irq_data);
+
+ return IRQ_WAKE_THREAD;
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int da8xx_rproc_start(struct rproc *rproc)
+{
+ struct device *dev = rproc->dev.parent;
+ struct da8xx_rproc *drproc = (struct da8xx_rproc *)rproc->priv;
+ struct clk *dsp_clk = drproc->dsp_clk;
+
+ /* hw requires the start (boot) address be on 1KB boundary */
+ if (rproc->bootaddr & 0x3ff) {
+ dev_err(dev, "invalid boot address: must be aligned to 1KB\n");
+
+ return -EINVAL;
+ }
+
+ writel(rproc->bootaddr, drproc->bootreg);
+
+ clk_enable(dsp_clk);
+ davinci_clk_reset_deassert(dsp_clk);
+
+ return 0;
+}
+
+static int da8xx_rproc_stop(struct rproc *rproc)
+{
+ struct da8xx_rproc *drproc = rproc->priv;
+
+ clk_disable(drproc->dsp_clk);
+
+ return 0;
+}
+
+/* kick a virtqueue */
+static void da8xx_rproc_kick(struct rproc *rproc, int vqid)
+{
+ struct da8xx_rproc *drproc = (struct da8xx_rproc *)rproc->priv;
+
+ /* Interupt remote proc */
+ writel(SYSCFG_CHIPSIG2, drproc->chipsig);
+}
+
+static struct rproc_ops da8xx_rproc_ops = {
+ .start = da8xx_rproc_start,
+ .stop = da8xx_rproc_stop,
+ .kick = da8xx_rproc_kick,
+};
+
+static int reset_assert(struct device *dev)
+{
+ struct clk *dsp_clk;
+
+ dsp_clk = clk_get(dev, NULL);
+ if (IS_ERR(dsp_clk)) {
+ dev_err(dev, "clk_get error: %ld\n", PTR_ERR(dsp_clk));
+ return PTR_ERR(dsp_clk);
+ }
+
+ davinci_clk_reset_assert(dsp_clk);
+ clk_put(dsp_clk);
+
+ return 0;
+}
+
+static int da8xx_rproc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct da8xx_rproc *drproc;
+ struct rproc *rproc;
+ struct irq_data *irq_data;
+ struct resource *bootreg_res;
+ struct resource *chipsig_res;
+ struct clk *dsp_clk;
+ void __iomem *chipsig;
+ void __iomem *bootreg;
+ int irq;
+ int ret;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(dev, "platform_get_irq(pdev, 0) error: %d\n", irq);
+ return irq;
+ }
+
+ irq_data = irq_get_irq_data(irq);
+ if (!irq_data) {
+ dev_err(dev, "irq_get_irq_data(%d): NULL\n", irq);
+ return -EINVAL;
+ }
+
+ bootreg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ bootreg = devm_ioremap_resource(dev, bootreg_res);
+ if (IS_ERR(bootreg))
+ return PTR_ERR(bootreg);
+
+ chipsig_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ chipsig = devm_ioremap_resource(dev, chipsig_res);
+ if (IS_ERR(chipsig))
+ return PTR_ERR(chipsig);
+
+ dsp_clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(dsp_clk)) {
+ dev_err(dev, "clk_get error: %ld\n", PTR_ERR(dsp_clk));
+
+ return PTR_ERR(dsp_clk);
+ }
+
+ rproc = rproc_alloc(dev, "dsp", &da8xx_rproc_ops, da8xx_fw_name,
+ sizeof(*drproc));
+ if (!rproc)
+ return -ENOMEM;
+
+ drproc = rproc->priv;
+ drproc->rproc = rproc;
+
+ platform_set_drvdata(pdev, rproc);
+
+ /* everything the ISR needs is now setup, so hook it up */
+ ret = devm_request_threaded_irq(dev, irq, da8xx_rproc_callback,
+ handle_event, 0, "da8xx-remoteproc",
+ rproc);
+ if (ret) {
+ dev_err(dev, "devm_request_threaded_irq error: %d\n", ret);
+ goto free_rproc;
+ }
+
+ /*
+ * rproc_add() can end up enabling the DSP's clk with the DSP
+ * *not* in reset, but da8xx_rproc_start() needs the DSP to be
+ * held in reset at the time it is called.
+ */
+ ret = reset_assert(dev);
+ if (ret)
+ goto free_rproc;
+
+ drproc->chipsig = chipsig;
+ drproc->bootreg = bootreg;
+ drproc->ack_fxn = irq_data->chip->irq_ack;
+ drproc->irq_data = irq_data;
+ drproc->irq = irq;
+ drproc->dsp_clk = dsp_clk;
+
+ ret = rproc_add(rproc);
+ if (ret) {
+ dev_err(dev, "rproc_add failed: %d\n", ret);
+ goto free_rproc;
+ }
+
+ return 0;
+
+free_rproc:
+ rproc_put(rproc);
+
+ return ret;
+}
+
+static int da8xx_rproc_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct rproc *rproc = platform_get_drvdata(pdev);
+ struct da8xx_rproc *drproc = (struct da8xx_rproc *)rproc->priv;
+
+ /*
+ * It's important to place the DSP in reset before going away,
+ * since a subsequent insmod of this module may enable the DSP's
+ * clock before its program/boot-address has been loaded and
+ * before this module's probe has had a chance to reset the DSP.
+ * Without the reset, the DSP can lockup permanently when it
+ * begins executing garbage.
+ */
+ reset_assert(dev);
+
+ /*
+ * The devm subsystem might end up releasing things before
+ * freeing the irq, thus allowing an interrupt to sneak in while
+ * the device is being removed. This should prevent that.
+ */
+ disable_irq(drproc->irq);
+
+ rproc_del(rproc);
+ rproc_put(rproc);
+
+ return 0;
+}
+
+static struct platform_driver da8xx_rproc_driver = {
+ .probe = da8xx_rproc_probe,
+ .remove = da8xx_rproc_remove,
+ .driver = {
+ .name = "davinci-rproc",
+ .owner = THIS_MODULE,
+ },
+};
+
+module_platform_driver(da8xx_rproc_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("DA8XX Remote Processor control driver");
diff --git a/drivers/remoteproc/omap_remoteproc.c b/drivers/remoteproc/omap_remoteproc.c
index a1f7ac1f8cf..51689721ea7 100644
--- a/drivers/remoteproc/omap_remoteproc.c
+++ b/drivers/remoteproc/omap_remoteproc.c
@@ -27,9 +27,9 @@
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/remoteproc.h>
+#include <linux/omap-mailbox.h>
-#include <plat/mailbox.h>
-#include <plat/remoteproc.h>
+#include <linux/platform_data/remoteproc-omap.h>
#include "omap_remoteproc.h"
#include "remoteproc_internal.h"
@@ -116,6 +116,9 @@ static int omap_rproc_start(struct rproc *rproc)
struct omap_rproc_pdata *pdata = pdev->dev.platform_data;
int ret;
+ if (pdata->set_bootaddr)
+ pdata->set_bootaddr(rproc->bootaddr);
+
oproc->nb.notifier_call = omap_rproc_mbox_callback;
/* every omap rproc is assigned a mailbox instance for messaging */
@@ -176,7 +179,7 @@ static struct rproc_ops omap_rproc_ops = {
.kick = omap_rproc_kick,
};
-static int __devinit omap_rproc_probe(struct platform_device *pdev)
+static int omap_rproc_probe(struct platform_device *pdev)
{
struct omap_rproc_pdata *pdata = pdev->dev.platform_data;
struct omap_rproc *oproc;
@@ -210,7 +213,7 @@ free_rproc:
return ret;
}
-static int __devexit omap_rproc_remove(struct platform_device *pdev)
+static int omap_rproc_remove(struct platform_device *pdev)
{
struct rproc *rproc = platform_get_drvdata(pdev);
@@ -222,7 +225,7 @@ static int __devexit omap_rproc_remove(struct platform_device *pdev)
static struct platform_driver omap_rproc_driver = {
.probe = omap_rproc_probe,
- .remove = __devexit_p(omap_rproc_remove),
+ .remove = omap_rproc_remove,
.driver = {
.name = "omap-rproc",
.owner = THIS_MODULE,
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index d5c2dbfc744..3cd85a638af 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -37,6 +37,7 @@
#include <linux/iommu.h>
#include <linux/idr.h>
#include <linux/elf.h>
+#include <linux/crc32.h>
#include <linux/virtio_ids.h>
#include <linux/virtio_ring.h>
#include <asm/byteorder.h>
@@ -45,11 +46,24 @@
typedef int (*rproc_handle_resources_t)(struct rproc *rproc,
struct resource_table *table, int len);
-typedef int (*rproc_handle_resource_t)(struct rproc *rproc, void *, int avail);
+typedef int (*rproc_handle_resource_t)(struct rproc *rproc,
+ void *, int offset, int avail);
/* Unique indices for remoteproc devices */
static DEFINE_IDA(rproc_dev_index);
+static const char * const rproc_crash_names[] = {
+ [RPROC_MMUFAULT] = "mmufault",
+};
+
+/* translate rproc_crash_type to string */
+static const char *rproc_crash_to_string(enum rproc_crash_type type)
+{
+ if (type < ARRAY_SIZE(rproc_crash_names))
+ return rproc_crash_names[type];
+ return "unknown";
+}
+
/*
* This is the IOMMU fault handler we register with the IOMMU API
* (when relevant; not all remote processors access memory through
@@ -57,18 +71,19 @@ static DEFINE_IDA(rproc_dev_index);
*
* IOMMU core will invoke this handler whenever the remote processor
* will try to access an unmapped device address.
- *
- * Currently this is mostly a stub, but it will be later used to trigger
- * the recovery of the remote processor.
*/
static int rproc_iommu_fault(struct iommu_domain *domain, struct device *dev,
unsigned long iova, int flags, void *token)
{
+ struct rproc *rproc = token;
+
dev_err(dev, "iommu fault: da 0x%lx flags 0x%x\n", iova, flags);
+ rproc_report_crash(rproc, RPROC_MMUFAULT);
+
/*
* Let the iommu core know we're not really handling this fault;
- * we just plan to use this as a recovery trigger.
+ * we just used it as a recovery trigger.
*/
return -ENOSYS;
}
@@ -179,6 +194,7 @@ int rproc_alloc_vring(struct rproc_vdev *rvdev, int i)
struct rproc *rproc = rvdev->rproc;
struct device *dev = &rproc->dev;
struct rproc_vring *rvring = &rvdev->vring[i];
+ struct fw_rsc_vdev *rsc;
dma_addr_t dma;
void *va;
int ret, size, notifyid;
@@ -186,15 +202,9 @@ int rproc_alloc_vring(struct rproc_vdev *rvdev, int i)
/* actual size of vring (in bytes) */
size = PAGE_ALIGN(vring_size(rvring->len, rvring->align));
- if (!idr_pre_get(&rproc->notifyids, GFP_KERNEL)) {
- dev_err(dev, "idr_pre_get failed\n");
- return -ENOMEM;
- }
-
/*
* Allocate non-cacheable memory for the vring. In the future
* this call will also configure the IOMMU for us
- * TODO: let the rproc know the da of this vring
*/
va = dma_alloc_coherent(dev->parent, size, &dma, GFP_KERNEL);
if (!va) {
@@ -205,23 +215,32 @@ int rproc_alloc_vring(struct rproc_vdev *rvdev, int i)
/*
* Assign an rproc-wide unique index for this vring
* TODO: assign a notifyid for rvdev updates as well
- * TODO: let the rproc know the notifyid of this vring
* TODO: support predefined notifyids (via resource table)
*/
- ret = idr_get_new(&rproc->notifyids, rvring, &notifyid);
- if (ret) {
- dev_err(dev, "idr_get_new failed: %d\n", ret);
+ ret = idr_alloc(&rproc->notifyids, rvring, 0, 0, GFP_KERNEL);
+ if (ret < 0) {
+ dev_err(dev, "idr_alloc failed: %d\n", ret);
dma_free_coherent(dev->parent, size, va, dma);
return ret;
}
+ notifyid = ret;
- dev_dbg(dev, "vring%d: va %p dma %x size %x idr %d\n", i, va,
- dma, size, notifyid);
+ dev_dbg(dev, "vring%d: va %p dma %llx size %x idr %d\n", i, va,
+ (unsigned long long)dma, size, notifyid);
rvring->va = va;
rvring->dma = dma;
rvring->notifyid = notifyid;
+ /*
+ * Let the rproc know the notifyid and da of this vring.
+ * Not all platforms use dma_alloc_coherent to automatically
+ * set up the iommu. In this case the device address (da) will
+ * hold the physical address and not the device address.
+ */
+ rsc = (void *)rproc->table_ptr + rvdev->rsc_offset;
+ rsc->vring[i].da = dma;
+ rsc->vring[i].notifyid = notifyid;
return 0;
}
@@ -260,9 +279,16 @@ void rproc_free_vring(struct rproc_vring *rvring)
{
int size = PAGE_ALIGN(vring_size(rvring->len, rvring->align));
struct rproc *rproc = rvring->rvdev->rproc;
+ int idx = rvring->rvdev->vring - rvring;
+ struct fw_rsc_vdev *rsc;
dma_free_coherent(rproc->dev.parent, size, rvring->va, rvring->dma);
idr_remove(&rproc->notifyids, rvring->notifyid);
+
+ /* reset resource entry info */
+ rsc = (void *)rproc->table_ptr + rvring->rvdev->rsc_offset;
+ rsc->vring[idx].da = 0;
+ rsc->vring[idx].notifyid = -1;
}
/**
@@ -293,7 +319,7 @@ void rproc_free_vring(struct rproc_vring *rvring)
* Returns 0 on success, or an appropriate error code otherwise
*/
static int rproc_handle_vdev(struct rproc *rproc, struct fw_rsc_vdev *rsc,
- int avail)
+ int offset, int avail)
{
struct device *dev = &rproc->dev;
struct rproc_vdev *rvdev;
@@ -334,18 +360,20 @@ static int rproc_handle_vdev(struct rproc *rproc, struct fw_rsc_vdev *rsc,
goto free_rvdev;
}
- /* remember the device features */
- rvdev->dfeatures = rsc->dfeatures;
+ /* remember the resource offset*/
+ rvdev->rsc_offset = offset;
list_add_tail(&rvdev->node, &rproc->rvdevs);
/* it is now safe to add the virtio device */
ret = rproc_add_virtio_dev(rvdev, rsc->id);
if (ret)
- goto free_rvdev;
+ goto remove_rvdev;
return 0;
+remove_rvdev:
+ list_del(&rvdev->node);
free_rvdev:
kfree(rvdev);
return ret;
@@ -368,7 +396,7 @@ free_rvdev:
* Returns 0 on success, or an appropriate error code otherwise
*/
static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc,
- int avail)
+ int offset, int avail)
{
struct rproc_mem_entry *trace;
struct device *dev = &rproc->dev;
@@ -450,7 +478,7 @@ static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc,
* are outside those ranges.
*/
static int rproc_handle_devmem(struct rproc *rproc, struct fw_rsc_devmem *rsc,
- int avail)
+ int offset, int avail)
{
struct rproc_mem_entry *mapping;
struct device *dev = &rproc->dev;
@@ -523,7 +551,9 @@ out:
* pressure is important; it may have a substantial impact on performance.
*/
static int rproc_handle_carveout(struct rproc *rproc,
- struct fw_rsc_carveout *rsc, int avail)
+ struct fw_rsc_carveout *rsc,
+ int offset, int avail)
+
{
struct rproc_mem_entry *carveout, *mapping;
struct device *dev = &rproc->dev;
@@ -545,17 +575,10 @@ static int rproc_handle_carveout(struct rproc *rproc,
dev_dbg(dev, "carveout rsc: da %x, pa %x, len %x, flags %x\n",
rsc->da, rsc->pa, rsc->len, rsc->flags);
- mapping = kzalloc(sizeof(*mapping), GFP_KERNEL);
- if (!mapping) {
- dev_err(dev, "kzalloc mapping failed\n");
- return -ENOMEM;
- }
-
carveout = kzalloc(sizeof(*carveout), GFP_KERNEL);
if (!carveout) {
dev_err(dev, "kzalloc carveout failed\n");
- ret = -ENOMEM;
- goto free_mapping;
+ return -ENOMEM;
}
va = dma_alloc_coherent(dev->parent, rsc->len, &dma, GFP_KERNEL);
@@ -565,7 +588,8 @@ static int rproc_handle_carveout(struct rproc *rproc,
goto free_carv;
}
- dev_dbg(dev, "carveout va %p, dma %x, len 0x%x\n", va, dma, rsc->len);
+ dev_dbg(dev, "carveout va %p, dma %llx, len 0x%x\n", va,
+ (unsigned long long)dma, rsc->len);
/*
* Ok, this is non-standard.
@@ -585,11 +609,18 @@ static int rproc_handle_carveout(struct rproc *rproc,
* physical address in this case.
*/
if (rproc->domain) {
+ mapping = kzalloc(sizeof(*mapping), GFP_KERNEL);
+ if (!mapping) {
+ dev_err(dev, "kzalloc mapping failed\n");
+ ret = -ENOMEM;
+ goto dma_free;
+ }
+
ret = iommu_map(rproc->domain, rsc->da, dma, rsc->len,
rsc->flags);
if (ret) {
dev_err(dev, "iommu_map failed: %d\n", ret);
- goto dma_free;
+ goto free_mapping;
}
/*
@@ -603,7 +634,8 @@ static int rproc_handle_carveout(struct rproc *rproc,
mapping->len = rsc->len;
list_add_tail(&mapping->node, &rproc->mappings);
- dev_dbg(dev, "carveout mapped 0x%x to 0x%x\n", rsc->da, dma);
+ dev_dbg(dev, "carveout mapped 0x%x to 0x%llx\n",
+ rsc->da, (unsigned long long)dma);
}
/*
@@ -634,37 +666,54 @@ static int rproc_handle_carveout(struct rproc *rproc,
return 0;
+free_mapping:
+ kfree(mapping);
dma_free:
dma_free_coherent(dev->parent, rsc->len, va, dma);
free_carv:
kfree(carveout);
-free_mapping:
- kfree(mapping);
return ret;
}
+static int rproc_count_vrings(struct rproc *rproc, struct fw_rsc_vdev *rsc,
+ int offset, int avail)
+{
+ /* Summarize the number of notification IDs */
+ rproc->max_notifyid += rsc->num_of_vrings;
+
+ return 0;
+}
+
/*
* A lookup table for resource handlers. The indices are defined in
* enum fw_resource_type.
*/
-static rproc_handle_resource_t rproc_handle_rsc[] = {
+static rproc_handle_resource_t rproc_loading_handlers[RSC_LAST] = {
[RSC_CARVEOUT] = (rproc_handle_resource_t)rproc_handle_carveout,
[RSC_DEVMEM] = (rproc_handle_resource_t)rproc_handle_devmem,
[RSC_TRACE] = (rproc_handle_resource_t)rproc_handle_trace,
[RSC_VDEV] = NULL, /* VDEVs were handled upon registrarion */
};
+static rproc_handle_resource_t rproc_vdev_handler[RSC_LAST] = {
+ [RSC_VDEV] = (rproc_handle_resource_t)rproc_handle_vdev,
+};
+
+static rproc_handle_resource_t rproc_count_vrings_handler[RSC_LAST] = {
+ [RSC_VDEV] = (rproc_handle_resource_t)rproc_count_vrings,
+};
+
/* handle firmware resource entries before booting the remote processor */
-static int
-rproc_handle_boot_rsc(struct rproc *rproc, struct resource_table *table, int len)
+static int rproc_handle_resources(struct rproc *rproc, int len,
+ rproc_handle_resource_t handlers[RSC_LAST])
{
struct device *dev = &rproc->dev;
rproc_handle_resource_t handler;
int ret = 0, i;
- for (i = 0; i < table->num; i++) {
- int offset = table->offset[i];
- struct fw_rsc_hdr *hdr = (void *)table + offset;
+ for (i = 0; i < rproc->table_ptr->num; i++) {
+ int offset = rproc->table_ptr->offset[i];
+ struct fw_rsc_hdr *hdr = (void *)rproc->table_ptr + offset;
int avail = len - offset - sizeof(*hdr);
void *rsc = (void *)hdr + sizeof(*hdr);
@@ -681,45 +730,11 @@ rproc_handle_boot_rsc(struct rproc *rproc, struct resource_table *table, int len
continue;
}
- handler = rproc_handle_rsc[hdr->type];
+ handler = handlers[hdr->type];
if (!handler)
continue;
- ret = handler(rproc, rsc, avail);
- if (ret)
- break;
- }
-
- return ret;
-}
-
-/* handle firmware resource entries while registering the remote processor */
-static int
-rproc_handle_virtio_rsc(struct rproc *rproc, struct resource_table *table, int len)
-{
- struct device *dev = &rproc->dev;
- int ret = 0, i;
-
- for (i = 0; i < table->num; i++) {
- int offset = table->offset[i];
- struct fw_rsc_hdr *hdr = (void *)table + offset;
- int avail = len - offset - sizeof(*hdr);
- struct fw_rsc_vdev *vrsc;
-
- /* make sure table isn't truncated */
- if (avail < 0) {
- dev_err(dev, "rsc table is truncated\n");
- return -EINVAL;
- }
-
- dev_dbg(dev, "%s: rsc type %d\n", __func__, hdr->type);
-
- if (hdr->type != RSC_VDEV)
- continue;
-
- vrsc = (struct fw_rsc_vdev *)hdr->data;
-
- ret = rproc_handle_vdev(rproc, vrsc, avail);
+ ret = handler(rproc, rsc, offset + sizeof(*hdr), avail);
if (ret)
break;
}
@@ -747,13 +762,6 @@ static void rproc_resource_cleanup(struct rproc *rproc)
kfree(entry);
}
- /* clean up carveout allocations */
- list_for_each_entry_safe(entry, tmp, &rproc->carveouts, node) {
- dma_free_coherent(dev->parent, entry->len, entry->va, entry->dma);
- list_del(&entry->node);
- kfree(entry);
- }
-
/* clean up iommu mapping entries */
list_for_each_entry_safe(entry, tmp, &rproc->mappings, node) {
size_t unmapped;
@@ -768,6 +776,13 @@ static void rproc_resource_cleanup(struct rproc *rproc)
list_del(&entry->node);
kfree(entry);
}
+
+ /* clean up carveout allocations */
+ list_for_each_entry_safe(entry, tmp, &rproc->carveouts, node) {
+ dma_free_coherent(dev->parent, entry->len, entry->va, entry->dma);
+ list_del(&entry->node);
+ kfree(entry);
+ }
}
/*
@@ -777,9 +792,12 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw)
{
struct device *dev = &rproc->dev;
const char *name = rproc->firmware;
- struct resource_table *table;
+ struct resource_table *table, *loaded_table;
int ret, tablesz;
+ if (!rproc->table_ptr)
+ return -ENOMEM;
+
ret = rproc_fw_sanity_check(rproc, fw);
if (ret)
return ret;
@@ -797,16 +815,22 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw)
}
rproc->bootaddr = rproc_get_boot_addr(rproc, fw);
+ ret = -EINVAL;
/* look for the resource table */
table = rproc_find_rsc_table(rproc, fw, &tablesz);
if (!table) {
- ret = -EINVAL;
+ goto clean_up;
+ }
+
+ /* Verify that resource table in loaded fw is unchanged */
+ if (rproc->table_csum != crc32(0, table, tablesz)) {
+ dev_err(dev, "resource checksum failed, fw changed?\n");
goto clean_up;
}
/* handle fw resources which are required to boot rproc */
- ret = rproc_handle_boot_rsc(rproc, table, tablesz);
+ ret = rproc_handle_resources(rproc, tablesz, rproc_loading_handlers);
if (ret) {
dev_err(dev, "Failed to process resources: %d\n", ret);
goto clean_up;
@@ -819,6 +843,21 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw)
goto clean_up;
}
+ /*
+ * The starting device has been given the rproc->cached_table as the
+ * resource table. The address of the vring along with the other
+ * allocated resources (carveouts etc) is stored in cached_table.
+ * In order to pass this information to the remote device we must
+ * copy this information to device memory.
+ */
+ loaded_table = rproc_find_loaded_rsc_table(rproc, fw);
+ if (!loaded_table) {
+ ret = -EINVAL;
+ goto clean_up;
+ }
+
+ memcpy(loaded_table, rproc->cached_table, tablesz);
+
/* power up the remote processor */
ret = rproc->ops->start(rproc);
if (ret) {
@@ -826,6 +865,13 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw)
goto clean_up;
}
+ /*
+ * Update table_ptr so that all subsequent vring allocations and
+ * virtio fields manipulation update the actual loaded resource table
+ * in device memory.
+ */
+ rproc->table_ptr = loaded_table;
+
rproc->state = RPROC_RUNNING;
dev_info(dev, "remote processor %s is now up\n", rproc->name);
@@ -860,17 +906,123 @@ static void rproc_fw_config_virtio(const struct firmware *fw, void *context)
if (!table)
goto out;
- /* look for virtio devices and register them */
- ret = rproc_handle_virtio_rsc(rproc, table, tablesz);
+ rproc->table_csum = crc32(0, table, tablesz);
+
+ /*
+ * Create a copy of the resource table. When a virtio device starts
+ * and calls vring_new_virtqueue() the address of the allocated vring
+ * will be stored in the cached_table. Before the device is started,
+ * cached_table will be copied into devic memory.
+ */
+ rproc->cached_table = kmemdup(table, tablesz, GFP_KERNEL);
+ if (!rproc->cached_table)
+ goto out;
+
+ rproc->table_ptr = rproc->cached_table;
+
+ /* count the number of notify-ids */
+ rproc->max_notifyid = -1;
+ ret = rproc_handle_resources(rproc, tablesz, rproc_count_vrings_handler);
if (ret)
goto out;
+ /* look for virtio devices and register them */
+ ret = rproc_handle_resources(rproc, tablesz, rproc_vdev_handler);
+
out:
release_firmware(fw);
/* allow rproc_del() contexts, if any, to proceed */
complete_all(&rproc->firmware_loading_complete);
}
+static int rproc_add_virtio_devices(struct rproc *rproc)
+{
+ int ret;
+
+ /* rproc_del() calls must wait until async loader completes */
+ init_completion(&rproc->firmware_loading_complete);
+
+ /*
+ * We must retrieve early virtio configuration info from
+ * the firmware (e.g. whether to register a virtio device,
+ * what virtio features does it support, ...).
+ *
+ * We're initiating an asynchronous firmware loading, so we can
+ * be built-in kernel code, without hanging the boot process.
+ */
+ ret = request_firmware_nowait(THIS_MODULE, FW_ACTION_HOTPLUG,
+ rproc->firmware, &rproc->dev, GFP_KERNEL,
+ rproc, rproc_fw_config_virtio);
+ if (ret < 0) {
+ dev_err(&rproc->dev, "request_firmware_nowait err: %d\n", ret);
+ complete_all(&rproc->firmware_loading_complete);
+ }
+
+ return ret;
+}
+
+/**
+ * rproc_trigger_recovery() - recover a remoteproc
+ * @rproc: the remote processor
+ *
+ * The recovery is done by reseting all the virtio devices, that way all the
+ * rpmsg drivers will be reseted along with the remote processor making the
+ * remoteproc functional again.
+ *
+ * This function can sleep, so it cannot be called from atomic context.
+ */
+int rproc_trigger_recovery(struct rproc *rproc)
+{
+ struct rproc_vdev *rvdev, *rvtmp;
+
+ dev_err(&rproc->dev, "recovering %s\n", rproc->name);
+
+ init_completion(&rproc->crash_comp);
+
+ /* clean up remote vdev entries */
+ list_for_each_entry_safe(rvdev, rvtmp, &rproc->rvdevs, node)
+ rproc_remove_virtio_dev(rvdev);
+
+ /* wait until there is no more rproc users */
+ wait_for_completion(&rproc->crash_comp);
+
+ /* Free the copy of the resource table */
+ kfree(rproc->cached_table);
+
+ return rproc_add_virtio_devices(rproc);
+}
+
+/**
+ * rproc_crash_handler_work() - handle a crash
+ *
+ * This function needs to handle everything related to a crash, like cpu
+ * registers and stack dump, information to help to debug the fatal error, etc.
+ */
+static void rproc_crash_handler_work(struct work_struct *work)
+{
+ struct rproc *rproc = container_of(work, struct rproc, crash_handler);
+ struct device *dev = &rproc->dev;
+
+ dev_dbg(dev, "enter %s\n", __func__);
+
+ mutex_lock(&rproc->lock);
+
+ if (rproc->state == RPROC_CRASHED || rproc->state == RPROC_OFFLINE) {
+ /* handle only the first crash detected */
+ mutex_unlock(&rproc->lock);
+ return;
+ }
+
+ rproc->state = RPROC_CRASHED;
+ dev_err(dev, "handling crash #%u in %s\n", ++rproc->crash_cnt,
+ rproc->name);
+
+ mutex_unlock(&rproc->lock);
+
+ if (!rproc->recovery_disabled)
+ rproc_trigger_recovery(rproc);
+}
+
/**
* rproc_boot() - boot a remote processor
* @rproc: handle of a remote processor
@@ -992,6 +1144,13 @@ void rproc_shutdown(struct rproc *rproc)
rproc_disable_iommu(rproc);
+ /* Give the next start a clean resource table */
+ rproc->table_ptr = rproc->cached_table;
+
+ /* if in crash state, unlock crash handler */
+ if (rproc->state == RPROC_CRASHED)
+ complete_all(&rproc->crash_comp);
+
rproc->state = RPROC_OFFLINE;
dev_info(dev, "stopped remote processor %s\n", rproc->name);
@@ -1026,7 +1185,7 @@ EXPORT_SYMBOL(rproc_shutdown);
int rproc_add(struct rproc *rproc)
{
struct device *dev = &rproc->dev;
- int ret = 0;
+ int ret;
ret = device_add(dev);
if (ret < 0)
@@ -1040,26 +1199,7 @@ int rproc_add(struct rproc *rproc)
/* create debugfs entries */
rproc_create_debug_dir(rproc);
- /* rproc_del() calls must wait until async loader completes */
- init_completion(&rproc->firmware_loading_complete);
-
- /*
- * We must retrieve early virtio configuration info from
- * the firmware (e.g. whether to register a virtio device,
- * what virtio features does it support, ...).
- *
- * We're initiating an asynchronous firmware loading, so we can
- * be built-in kernel code, without hanging the boot process.
- */
- ret = request_firmware_nowait(THIS_MODULE, FW_ACTION_HOTPLUG,
- rproc->firmware, dev, GFP_KERNEL,
- rproc, rproc_fw_config_virtio);
- if (ret < 0) {
- dev_err(dev, "request_firmware_nowait failed: %d\n", ret);
- complete_all(&rproc->firmware_loading_complete);
- }
-
- return ret;
+ return rproc_add_virtio_devices(rproc);
}
EXPORT_SYMBOL(rproc_add);
@@ -1080,7 +1220,6 @@ static void rproc_type_release(struct device *dev)
rproc_delete_debug_dir(rproc);
- idr_remove_all(&rproc->notifyids);
idr_destroy(&rproc->notifyids);
if (rproc->index >= 0)
@@ -1099,11 +1238,11 @@ static struct device_type rproc_type = {
* @dev: the underlying device
* @name: name of this remote processor
* @ops: platform-specific handlers (mainly start/stop)
- * @firmware: name of firmware file to load
+ * @firmware: name of firmware file to load, can be NULL
* @len: length of private data needed by the rproc driver (in bytes)
*
* Allocates a new remote processor handle, but does not register
- * it yet.
+ * it yet. if @firmware is NULL, a default name is used.
*
* This function should be used by rproc implementations during initialization
* of the remote processor.
@@ -1122,19 +1261,39 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
const char *firmware, int len)
{
struct rproc *rproc;
+ char *p, *template = "rproc-%s-fw";
+ int name_len = 0;
if (!dev || !name || !ops)
return NULL;
- rproc = kzalloc(sizeof(struct rproc) + len, GFP_KERNEL);
+ if (!firmware)
+ /*
+ * Make room for default firmware name (minus %s plus '\0').
+ * If the caller didn't pass in a firmware name then
+ * construct a default name. We're already glomming 'len'
+ * bytes onto the end of the struct rproc allocation, so do
+ * a few more for the default firmware name (but only if
+ * the caller doesn't pass one).
+ */
+ name_len = strlen(name) + strlen(template) - 2 + 1;
+
+ rproc = kzalloc(sizeof(struct rproc) + len + name_len, GFP_KERNEL);
if (!rproc) {
dev_err(dev, "%s: kzalloc failed\n", __func__);
return NULL;
}
+ if (!firmware) {
+ p = (char *)rproc + sizeof(struct rproc) + len;
+ snprintf(p, name_len, template, name);
+ } else {
+ p = (char *)firmware;
+ }
+
+ rproc->firmware = p;
rproc->name = name;
rproc->ops = ops;
- rproc->firmware = firmware;
rproc->priv = &rproc[1];
device_initialize(&rproc->dev);
@@ -1165,6 +1324,9 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
INIT_LIST_HEAD(&rproc->traces);
INIT_LIST_HEAD(&rproc->rvdevs);
+ INIT_WORK(&rproc->crash_handler, rproc_crash_handler_work);
+ init_completion(&rproc->crash_comp);
+
rproc->state = RPROC_OFFLINE;
return rproc;
@@ -1215,12 +1377,41 @@ int rproc_del(struct rproc *rproc)
list_for_each_entry_safe(rvdev, tmp, &rproc->rvdevs, node)
rproc_remove_virtio_dev(rvdev);
+ /* Free the copy of the resource table */
+ kfree(rproc->cached_table);
+
device_del(&rproc->dev);
return 0;
}
EXPORT_SYMBOL(rproc_del);
+/**
+ * rproc_report_crash() - rproc crash reporter function
+ * @rproc: remote processor
+ * @type: crash type
+ *
+ * This function must be called every time a crash is detected by the low-level
+ * drivers implementing a specific remoteproc. This should not be called from a
+ * non-remoteproc driver.
+ *
+ * This function can be called from atomic/interrupt context.
+ */
+void rproc_report_crash(struct rproc *rproc, enum rproc_crash_type type)
+{
+ if (!rproc) {
+ pr_err("NULL rproc pointer\n");
+ return;
+ }
+
+ dev_err(&rproc->dev, "crash detected in %s: type %s\n",
+ rproc->name, rproc_crash_to_string(type));
+
+ /* create a new task to handle the error */
+ schedule_work(&rproc->crash_handler);
+}
+EXPORT_SYMBOL(rproc_report_crash);
+
static int __init remoteproc_init(void)
{
rproc_init_debugfs();
diff --git a/drivers/remoteproc/remoteproc_debugfs.c b/drivers/remoteproc/remoteproc_debugfs.c
index 03833850f21..9d30809bb40 100644
--- a/drivers/remoteproc/remoteproc_debugfs.c
+++ b/drivers/remoteproc/remoteproc_debugfs.c
@@ -28,6 +28,9 @@
#include <linux/debugfs.h>
#include <linux/remoteproc.h>
#include <linux/device.h>
+#include <linux/uaccess.h>
+
+#include "remoteproc_internal.h"
/* remoteproc debugfs parent dir */
static struct dentry *rproc_dbg;
@@ -79,7 +82,7 @@ static ssize_t rproc_state_read(struct file *filp, char __user *userbuf,
state = rproc->state > RPROC_LAST ? RPROC_LAST : rproc->state;
- i = snprintf(buf, 30, "%.28s (%d)\n", rproc_state_string[state],
+ i = scnprintf(buf, 30, "%.28s (%d)\n", rproc_state_string[state],
rproc->state);
return simple_read_from_buffer(userbuf, count, ppos, buf, i);
@@ -100,7 +103,7 @@ static ssize_t rproc_name_read(struct file *filp, char __user *userbuf,
char buf[100];
int i;
- i = snprintf(buf, sizeof(buf), "%.98s\n", rproc->name);
+ i = scnprintf(buf, sizeof(buf), "%.98s\n", rproc->name);
return simple_read_from_buffer(userbuf, count, ppos, buf, i);
}
@@ -111,6 +114,82 @@ static const struct file_operations rproc_name_ops = {
.llseek = generic_file_llseek,
};
+/* expose recovery flag via debugfs */
+static ssize_t rproc_recovery_read(struct file *filp, char __user *userbuf,
+ size_t count, loff_t *ppos)
+{
+ struct rproc *rproc = filp->private_data;
+ char *buf = rproc->recovery_disabled ? "disabled\n" : "enabled\n";
+
+ return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
+}
+
+/*
+ * By writing to the 'recovery' debugfs entry, we control the behavior of the
+ * recovery mechanism dynamically. The default value of this entry is "enabled".
+ *
+ * The 'recovery' debugfs entry supports these commands:
+ *
+ * enabled: When enabled, the remote processor will be automatically
+ * recovered whenever it crashes. Moreover, if the remote
+ * processor crashes while recovery is disabled, it will
+ * be automatically recovered too as soon as recovery is enabled.
+ *
+ * disabled: When disabled, a remote processor will remain in a crashed
+ * state if it crashes. This is useful for debugging purposes;
+ * without it, debugging a crash is substantially harder.
+ *
+ * recover: This function will trigger an immediate recovery if the
+ * remote processor is in a crashed state, without changing
+ * or checking the recovery state (enabled/disabled).
+ * This is useful during debugging sessions, when one expects
+ * additional crashes to happen after enabling recovery. In this
+ * case, enabling recovery will make it hard to debug subsequent
+ * crashes, so it's recommended to keep recovery disabled, and
+ * instead use the "recover" command as needed.
+ */
+static ssize_t
+rproc_recovery_write(struct file *filp, const char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct rproc *rproc = filp->private_data;
+ char buf[10];
+ int ret;
+
+ if (count > sizeof(buf))
+ return count;
+
+ ret = copy_from_user(buf, user_buf, count);
+ if (ret)
+ return -EFAULT;
+
+ /* remove end of line */
+ if (buf[count - 1] == '\n')
+ buf[count - 1] = '\0';
+
+ if (!strncmp(buf, "enabled", count)) {
+ rproc->recovery_disabled = false;
+ /* if rproc has crashed, trigger recovery */
+ if (rproc->state == RPROC_CRASHED)
+ rproc_trigger_recovery(rproc);
+ } else if (!strncmp(buf, "disabled", count)) {
+ rproc->recovery_disabled = true;
+ } else if (!strncmp(buf, "recover", count)) {
+ /* if rproc has crashed, trigger recovery */
+ if (rproc->state == RPROC_CRASHED)
+ rproc_trigger_recovery(rproc);
+ }
+
+ return count;
+}
+
+static const struct file_operations rproc_recovery_ops = {
+ .read = rproc_recovery_read,
+ .write = rproc_recovery_write,
+ .open = simple_open,
+ .llseek = generic_file_llseek,
+};
+
void rproc_remove_trace_file(struct dentry *tfile)
{
debugfs_remove(tfile);
@@ -154,6 +233,8 @@ void rproc_create_debug_dir(struct rproc *rproc)
rproc, &rproc_name_ops);
debugfs_create_file("state", 0400, rproc->dbg_dir,
rproc, &rproc_state_ops);
+ debugfs_create_file("recovery", 0400, rproc->dbg_dir,
+ rproc, &rproc_recovery_ops);
}
void __init rproc_init_debugfs(void)
@@ -167,6 +248,5 @@ void __init rproc_init_debugfs(void)
void __exit rproc_exit_debugfs(void)
{
- if (rproc_dbg)
- debugfs_remove(rproc_dbg);
+ debugfs_remove(rproc_dbg);
}
diff --git a/drivers/remoteproc/remoteproc_elf_loader.c b/drivers/remoteproc/remoteproc_elf_loader.c
index e1f89d64973..ce283a5b42a 100644
--- a/drivers/remoteproc/remoteproc_elf_loader.c
+++ b/drivers/remoteproc/remoteproc_elf_loader.c
@@ -66,13 +66,13 @@ rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw)
return -EINVAL;
}
- /* We assume the firmware has the same endianess as the host */
+ /* We assume the firmware has the same endianness as the host */
# ifdef __LITTLE_ENDIAN
if (ehdr->e_ident[EI_DATA] != ELFDATA2LSB) {
# else /* BIG ENDIAN */
if (ehdr->e_ident[EI_DATA] != ELFDATA2MSB) {
# endif
- dev_err(dev, "Unsupported firmware endianess\n");
+ dev_err(dev, "Unsupported firmware endianness\n");
return -EINVAL;
}
@@ -208,41 +208,22 @@ rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
return ret;
}
-/**
- * rproc_elf_find_rsc_table() - find the resource table
- * @rproc: the rproc handle
- * @fw: the ELF firmware image
- * @tablesz: place holder for providing back the table size
- *
- * This function finds the resource table inside the remote processor's
- * firmware. It is used both upon the registration of @rproc (in order
- * to look for and register the supported virito devices), and when the
- * @rproc is booted.
- *
- * Returns the pointer to the resource table if it is found, and write its
- * size into @tablesz. If a valid table isn't found, NULL is returned
- * (and @tablesz isn't set).
- */
-static struct resource_table *
-rproc_elf_find_rsc_table(struct rproc *rproc, const struct firmware *fw,
- int *tablesz)
+static struct elf32_shdr *
+find_table(struct device *dev, struct elf32_hdr *ehdr, size_t fw_size)
{
- struct elf32_hdr *ehdr;
struct elf32_shdr *shdr;
+ int i;
const char *name_table;
- struct device *dev = &rproc->dev;
struct resource_table *table = NULL;
- int i;
- const u8 *elf_data = fw->data;
+ const u8 *elf_data = (void *)ehdr;
- ehdr = (struct elf32_hdr *)elf_data;
+ /* look for the resource table and handle it */
shdr = (struct elf32_shdr *)(elf_data + ehdr->e_shoff);
name_table = elf_data + shdr[ehdr->e_shstrndx].sh_offset;
- /* look for the resource table and handle it */
for (i = 0; i < ehdr->e_shnum; i++, shdr++) {
- int size = shdr->sh_size;
- int offset = shdr->sh_offset;
+ u32 size = shdr->sh_size;
+ u32 offset = shdr->sh_offset;
if (strcmp(name_table + shdr->sh_name, ".resource_table"))
continue;
@@ -250,7 +231,7 @@ rproc_elf_find_rsc_table(struct rproc *rproc, const struct firmware *fw,
table = (struct resource_table *)(elf_data + offset);
/* make sure we have the entire table */
- if (offset + size > fw->size) {
+ if (offset + size > fw_size || offset + size < size) {
dev_err(dev, "resource table truncated\n");
return NULL;
}
@@ -280,16 +261,77 @@ rproc_elf_find_rsc_table(struct rproc *rproc, const struct firmware *fw,
return NULL;
}
- *tablesz = shdr->sh_size;
- break;
+ return shdr;
}
+ return NULL;
+}
+
+/**
+ * rproc_elf_find_rsc_table() - find the resource table
+ * @rproc: the rproc handle
+ * @fw: the ELF firmware image
+ * @tablesz: place holder for providing back the table size
+ *
+ * This function finds the resource table inside the remote processor's
+ * firmware. It is used both upon the registration of @rproc (in order
+ * to look for and register the supported virito devices), and when the
+ * @rproc is booted.
+ *
+ * Returns the pointer to the resource table if it is found, and write its
+ * size into @tablesz. If a valid table isn't found, NULL is returned
+ * (and @tablesz isn't set).
+ */
+static struct resource_table *
+rproc_elf_find_rsc_table(struct rproc *rproc, const struct firmware *fw,
+ int *tablesz)
+{
+ struct elf32_hdr *ehdr;
+ struct elf32_shdr *shdr;
+ struct device *dev = &rproc->dev;
+ struct resource_table *table = NULL;
+ const u8 *elf_data = fw->data;
+
+ ehdr = (struct elf32_hdr *)elf_data;
+
+ shdr = find_table(dev, ehdr, fw->size);
+ if (!shdr)
+ return NULL;
+
+ table = (struct resource_table *)(elf_data + shdr->sh_offset);
+ *tablesz = shdr->sh_size;
+
return table;
}
+/**
+ * rproc_elf_find_loaded_rsc_table() - find the loaded resource table
+ * @rproc: the rproc handle
+ * @fw: the ELF firmware image
+ *
+ * This function finds the location of the loaded resource table. Don't
+ * call this function if the table wasn't loaded yet - it's a bug if you do.
+ *
+ * Returns the pointer to the resource table if it is found or NULL otherwise.
+ * If the table wasn't loaded yet the result is unspecified.
+ */
+static struct resource_table *
+rproc_elf_find_loaded_rsc_table(struct rproc *rproc, const struct firmware *fw)
+{
+ struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data;
+ struct elf32_shdr *shdr;
+
+ shdr = find_table(&rproc->dev, ehdr, fw->size);
+ if (!shdr)
+ return NULL;
+
+ return rproc_da_to_va(rproc, shdr->sh_addr, shdr->sh_size);
+}
+
const struct rproc_fw_ops rproc_elf_fw_ops = {
.load = rproc_elf_load_segments,
.find_rsc_table = rproc_elf_find_rsc_table,
+ .find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
.sanity_check = rproc_elf_sanity_check,
.get_boot_addr = rproc_elf_get_boot_addr
};
diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
index a690ebe7aa5..70701a50ddf 100644
--- a/drivers/remoteproc/remoteproc_internal.h
+++ b/drivers/remoteproc/remoteproc_internal.h
@@ -27,7 +27,8 @@ struct rproc;
/**
* struct rproc_fw_ops - firmware format specific operations.
- * @find_rsc_table: finds the resource table inside the firmware image
+ * @find_rsc_table: find the resource table inside the firmware image
+ * @find_loaded_rsc_table: find the loaded resouce table
* @load: load firmeware to memory, where the remote processor
* expects to find it
* @sanity_check: sanity check the fw image
@@ -37,6 +38,8 @@ struct rproc_fw_ops {
struct resource_table *(*find_rsc_table) (struct rproc *rproc,
const struct firmware *fw,
int *tablesz);
+ struct resource_table *(*find_loaded_rsc_table)(struct rproc *rproc,
+ const struct firmware *fw);
int (*load)(struct rproc *rproc, const struct firmware *fw);
int (*sanity_check)(struct rproc *rproc, const struct firmware *fw);
u32 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw);
@@ -63,6 +66,7 @@ void rproc_free_vring(struct rproc_vring *rvring);
int rproc_alloc_vring(struct rproc_vdev *rvdev, int i);
void *rproc_da_to_va(struct rproc *rproc, u64 da, int len);
+int rproc_trigger_recovery(struct rproc *rproc);
static inline
int rproc_fw_sanity_check(struct rproc *rproc, const struct firmware *fw)
@@ -101,6 +105,16 @@ struct resource_table *rproc_find_rsc_table(struct rproc *rproc,
return NULL;
}
+static inline
+struct resource_table *rproc_find_loaded_rsc_table(struct rproc *rproc,
+ const struct firmware *fw)
+{
+ if (rproc->fw_ops->find_loaded_rsc_table)
+ return rproc->fw_ops->find_loaded_rsc_table(rproc, fw);
+
+ return NULL;
+}
+
extern const struct rproc_fw_ops rproc_elf_fw_ops;
#endif /* REMOTEPROC_INTERNAL_H */
diff --git a/drivers/remoteproc/remoteproc_virtio.c b/drivers/remoteproc/remoteproc_virtio.c
index 3541b4492f6..a34b50690b4 100644
--- a/drivers/remoteproc/remoteproc_virtio.c
+++ b/drivers/remoteproc/remoteproc_virtio.c
@@ -30,7 +30,7 @@
#include "remoteproc_internal.h"
/* kick the remote processor, and let it know which virtqueue to poke at */
-static void rproc_virtio_notify(struct virtqueue *vq)
+static bool rproc_virtio_notify(struct virtqueue *vq)
{
struct rproc_vring *rvring = vq->priv;
struct rproc *rproc = rvring->rvdev->rproc;
@@ -39,6 +39,7 @@ static void rproc_virtio_notify(struct virtqueue *vq)
dev_dbg(&rproc->dev, "kicking vq index: %d\n", notifyid);
rproc->ops->kick(rproc, notifyid);
+ return true;
}
/**
@@ -84,6 +85,9 @@ static struct virtqueue *rp_find_vq(struct virtio_device *vdev,
if (id >= ARRAY_SIZE(rvdev->vring))
return ERR_PTR(-EINVAL);
+ if (!name)
+ return NULL;
+
ret = rproc_alloc_vring(rvdev, id);
if (ret)
return ERR_PTR(ret);
@@ -103,7 +107,7 @@ static struct virtqueue *rp_find_vq(struct virtio_device *vdev,
* Create the new vq, and tell virtio we're not interested in
* the 'weak' smp barriers, since we're talking with a real device.
*/
- vq = vring_new_virtqueue(len, rvring->align, vdev, false, addr,
+ vq = vring_new_virtqueue(id, len, rvring->align, vdev, false, addr,
rproc_virtio_notify, callback, name);
if (!vq) {
dev_err(dev, "vring_new_virtqueue %s failed\n", name);
@@ -117,15 +121,11 @@ static struct virtqueue *rp_find_vq(struct virtio_device *vdev,
return vq;
}
-static void rproc_virtio_del_vqs(struct virtio_device *vdev)
+static void __rproc_virtio_del_vqs(struct virtio_device *vdev)
{
struct virtqueue *vq, *n;
- struct rproc *rproc = vdev_to_rproc(vdev);
struct rproc_vring *rvring;
- /* power down the remote processor before deleting vqs */
- rproc_shutdown(rproc);
-
list_for_each_entry_safe(vq, n, &vdev->vqs, list) {
rvring = vq->priv;
rvring->vq = NULL;
@@ -134,6 +134,16 @@ static void rproc_virtio_del_vqs(struct virtio_device *vdev)
}
}
+static void rproc_virtio_del_vqs(struct virtio_device *vdev)
+{
+ struct rproc *rproc = vdev_to_rproc(vdev);
+
+ /* power down the remote processor before deleting vqs */
+ rproc_shutdown(rproc);
+
+ __rproc_virtio_del_vqs(vdev);
+}
+
static int rproc_virtio_find_vqs(struct virtio_device *vdev, unsigned nvqs,
struct virtqueue *vqs[],
vq_callback_t *callbacks[],
@@ -160,29 +170,39 @@ static int rproc_virtio_find_vqs(struct virtio_device *vdev, unsigned nvqs,
return 0;
error:
- rproc_virtio_del_vqs(vdev);
+ __rproc_virtio_del_vqs(vdev);
return ret;
}
-/*
- * We don't support yet real virtio status semantics.
- *
- * The plan is to provide this via the VDEV resource entry
- * which is part of the firmware: this way the remote processor
- * will be able to access the status values as set by us.
- */
static u8 rproc_virtio_get_status(struct virtio_device *vdev)
{
- return 0;
+ struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+ struct fw_rsc_vdev *rsc;
+
+ rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+
+ return rsc->status;
}
static void rproc_virtio_set_status(struct virtio_device *vdev, u8 status)
{
+ struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+ struct fw_rsc_vdev *rsc;
+
+ rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+
+ rsc->status = status;
dev_dbg(&vdev->dev, "status: %d\n", status);
}
static void rproc_virtio_reset(struct virtio_device *vdev)
{
+ struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+ struct fw_rsc_vdev *rsc;
+
+ rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+
+ rsc->status = 0;
dev_dbg(&vdev->dev, "reset !\n");
}
@@ -190,13 +210,19 @@ static void rproc_virtio_reset(struct virtio_device *vdev)
static u32 rproc_virtio_get_features(struct virtio_device *vdev)
{
struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+ struct fw_rsc_vdev *rsc;
+
+ rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
- return rvdev->dfeatures;
+ return rsc->dfeatures;
}
static void rproc_virtio_finalize_features(struct virtio_device *vdev)
{
struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+ struct fw_rsc_vdev *rsc;
+
+ rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
/* Give virtio_ring a chance to accept features */
vring_transport_features(vdev);
@@ -204,16 +230,47 @@ static void rproc_virtio_finalize_features(struct virtio_device *vdev)
/*
* Remember the finalized features of our vdev, and provide it
* to the remote processor once it is powered on.
- *
- * Similarly to the status field, we don't expose yet the negotiated
- * features to the remote processors at this point. This will be
- * fixed as part of a small resource table overhaul and then an
- * extension of the virtio resource entries.
*/
- rvdev->gfeatures = vdev->features[0];
+ rsc->gfeatures = vdev->features[0];
+}
+
+static void rproc_virtio_get(struct virtio_device *vdev, unsigned offset,
+ void *buf, unsigned len)
+{
+ struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+ struct fw_rsc_vdev *rsc;
+ void *cfg;
+
+ rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+ cfg = &rsc->vring[rsc->num_of_vrings];
+
+ if (offset + len > rsc->config_len || offset + len < len) {
+ dev_err(&vdev->dev, "rproc_virtio_get: access out of bounds\n");
+ return;
+ }
+
+ memcpy(buf, cfg + offset, len);
+}
+
+static void rproc_virtio_set(struct virtio_device *vdev, unsigned offset,
+ const void *buf, unsigned len)
+{
+ struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+ struct fw_rsc_vdev *rsc;
+ void *cfg;
+
+ rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+ cfg = &rsc->vring[rsc->num_of_vrings];
+
+ if (offset + len > rsc->config_len || offset + len < len) {
+ dev_err(&vdev->dev, "rproc_virtio_set: access out of bounds\n");
+ return;
+ }
+
+ memcpy(cfg + offset, buf, len);
}
-static struct virtio_config_ops rproc_virtio_config_ops = {
+static const struct virtio_config_ops rproc_virtio_config_ops = {
.get_features = rproc_virtio_get_features,
.finalize_features = rproc_virtio_finalize_features,
.find_vqs = rproc_virtio_find_vqs,
@@ -221,6 +278,8 @@ static struct virtio_config_ops rproc_virtio_config_ops = {
.reset = rproc_virtio_reset,
.set_status = rproc_virtio_set_status,
.get_status = rproc_virtio_get_status,
+ .get = rproc_virtio_get,
+ .set = rproc_virtio_set,
};
/*
diff --git a/drivers/remoteproc/ste_modem_rproc.c b/drivers/remoteproc/ste_modem_rproc.c
new file mode 100644
index 00000000000..c4ac9104dd8
--- /dev/null
+++ b/drivers/remoteproc/ste_modem_rproc.c
@@ -0,0 +1,342 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2012
+ * Author: Sjur Brændeland <sjur.brandeland@stericsson.com>
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <linux/remoteproc.h>
+#include <linux/ste_modem_shm.h>
+#include "remoteproc_internal.h"
+
+#define SPROC_FW_SIZE (50 * 4096)
+#define SPROC_MAX_TOC_ENTRIES 32
+#define SPROC_MAX_NOTIFY_ID 14
+#define SPROC_RESOURCE_NAME "rsc-table"
+#define SPROC_MODEM_NAME "ste-modem"
+#define SPROC_MODEM_FIRMWARE SPROC_MODEM_NAME "-fw.bin"
+
+#define sproc_dbg(sproc, fmt, ...) \
+ dev_dbg(&sproc->mdev->pdev.dev, fmt, ##__VA_ARGS__)
+#define sproc_err(sproc, fmt, ...) \
+ dev_err(&sproc->mdev->pdev.dev, fmt, ##__VA_ARGS__)
+
+/* STE-modem control structure */
+struct sproc {
+ struct rproc *rproc;
+ struct ste_modem_device *mdev;
+ int error;
+ void *fw_addr;
+ size_t fw_size;
+ dma_addr_t fw_dma_addr;
+};
+
+/* STE-Modem firmware entry */
+struct ste_toc_entry {
+ __le32 start;
+ __le32 size;
+ __le32 flags;
+ __le32 entry_point;
+ __le32 load_addr;
+ char name[12];
+};
+
+/*
+ * The Table Of Content is located at the start of the firmware image and
+ * at offset zero in the shared memory region. The resource table typically
+ * contains the initial boot image (boot strap) and other information elements
+ * such as remoteproc resource table. Each entry is identified by a unique
+ * name.
+ */
+struct ste_toc {
+ struct ste_toc_entry table[SPROC_MAX_TOC_ENTRIES];
+};
+
+/* Loads the firmware to shared memory. */
+static int sproc_load_segments(struct rproc *rproc, const struct firmware *fw)
+{
+ struct sproc *sproc = rproc->priv;
+
+ memcpy(sproc->fw_addr, fw->data, fw->size);
+
+ return 0;
+}
+
+/* Find the entry for resource table in the Table of Content */
+static const struct ste_toc_entry *sproc_find_rsc_entry(const void *data)
+{
+ int i;
+ const struct ste_toc *toc;
+ toc = data;
+
+ /* Search the table for the resource table */
+ for (i = 0; i < SPROC_MAX_TOC_ENTRIES &&
+ toc->table[i].start != 0xffffffff; i++) {
+ if (!strncmp(toc->table[i].name, SPROC_RESOURCE_NAME,
+ sizeof(toc->table[i].name)))
+ return &toc->table[i];
+ }
+
+ return NULL;
+}
+
+/* Find the resource table inside the remote processor's firmware. */
+static struct resource_table *
+sproc_find_rsc_table(struct rproc *rproc, const struct firmware *fw,
+ int *tablesz)
+{
+ struct sproc *sproc = rproc->priv;
+ struct resource_table *table;
+ const struct ste_toc_entry *entry;
+
+ if (!fw)
+ return NULL;
+
+ entry = sproc_find_rsc_entry(fw->data);
+ if (!entry) {
+ sproc_err(sproc, "resource table not found in fw\n");
+ return NULL;
+ }
+
+ table = (void *)(fw->data + entry->start);
+
+ /* sanity check size and offset of resource table */
+ if (entry->start > SPROC_FW_SIZE ||
+ entry->size > SPROC_FW_SIZE ||
+ fw->size > SPROC_FW_SIZE ||
+ entry->start + entry->size > fw->size ||
+ sizeof(struct resource_table) > entry->size) {
+ sproc_err(sproc, "bad size of fw or resource table\n");
+ return NULL;
+ }
+
+ /* we don't support any version beyond the first */
+ if (table->ver != 1) {
+ sproc_err(sproc, "unsupported fw ver: %d\n", table->ver);
+ return NULL;
+ }
+
+ /* make sure reserved bytes are zeroes */
+ if (table->reserved[0] || table->reserved[1]) {
+ sproc_err(sproc, "non zero reserved bytes\n");
+ return NULL;
+ }
+
+ /* make sure the offsets array isn't truncated */
+ if (table->num > SPROC_MAX_TOC_ENTRIES ||
+ table->num * sizeof(table->offset[0]) +
+ sizeof(struct resource_table) > entry->size) {
+ sproc_err(sproc, "resource table incomplete\n");
+ return NULL;
+ }
+
+ /* If the fw size has grown, release the previous fw allocation */
+ if (SPROC_FW_SIZE < fw->size) {
+ sproc_err(sproc, "Insufficient space for fw (%d < %zd)\n",
+ SPROC_FW_SIZE, fw->size);
+ return NULL;
+ }
+
+ sproc->fw_size = fw->size;
+ *tablesz = entry->size;
+
+ return table;
+}
+
+/* Find the resource table inside the remote processor's firmware. */
+static struct resource_table *
+sproc_find_loaded_rsc_table(struct rproc *rproc, const struct firmware *fw)
+{
+ struct sproc *sproc = rproc->priv;
+ const struct ste_toc_entry *entry;
+
+ if (!fw || !sproc->fw_addr)
+ return NULL;
+
+ entry = sproc_find_rsc_entry(sproc->fw_addr);
+ if (!entry) {
+ sproc_err(sproc, "resource table not found in fw\n");
+ return NULL;
+ }
+
+ return sproc->fw_addr + entry->start;
+}
+
+/* STE modem firmware handler operations */
+static const struct rproc_fw_ops sproc_fw_ops = {
+ .load = sproc_load_segments,
+ .find_rsc_table = sproc_find_rsc_table,
+ .find_loaded_rsc_table = sproc_find_loaded_rsc_table,
+};
+
+/* Kick the modem with specified notification id */
+static void sproc_kick(struct rproc *rproc, int vqid)
+{
+ struct sproc *sproc = rproc->priv;
+
+ sproc_dbg(sproc, "kick vqid:%d\n", vqid);
+
+ /*
+ * We need different notification IDs for RX and TX so add
+ * an offset on TX notification IDs.
+ */
+ sproc->mdev->ops.kick(sproc->mdev, vqid + SPROC_MAX_NOTIFY_ID);
+}
+
+/* Received a kick from a modem, kick the virtqueue */
+static void sproc_kick_callback(struct ste_modem_device *mdev, int vqid)
+{
+ struct sproc *sproc = mdev->drv_data;
+
+ if (rproc_vq_interrupt(sproc->rproc, vqid) == IRQ_NONE)
+ sproc_dbg(sproc, "no message was found in vqid %d\n", vqid);
+}
+
+static struct ste_modem_dev_cb sproc_dev_cb = {
+ .kick = sproc_kick_callback,
+};
+
+/* Start the STE modem */
+static int sproc_start(struct rproc *rproc)
+{
+ struct sproc *sproc = rproc->priv;
+ int i, err;
+
+ sproc_dbg(sproc, "start ste-modem\n");
+
+ /* Sanity test the max_notifyid */
+ if (rproc->max_notifyid > SPROC_MAX_NOTIFY_ID) {
+ sproc_err(sproc, "Notification IDs too high:%d\n",
+ rproc->max_notifyid);
+ return -EINVAL;
+ }
+
+ /* Subscribe to notifications */
+ for (i = 0; i <= rproc->max_notifyid; i++) {
+ err = sproc->mdev->ops.kick_subscribe(sproc->mdev, i);
+ if (err) {
+ sproc_err(sproc,
+ "subscription of kicks failed:%d\n", err);
+ return err;
+ }
+ }
+
+ /* Request modem start-up*/
+ return sproc->mdev->ops.power(sproc->mdev, true);
+}
+
+/* Stop the STE modem */
+static int sproc_stop(struct rproc *rproc)
+{
+ struct sproc *sproc = rproc->priv;
+ sproc_dbg(sproc, "stop ste-modem\n");
+
+ return sproc->mdev->ops.power(sproc->mdev, false);
+}
+
+static struct rproc_ops sproc_ops = {
+ .start = sproc_start,
+ .stop = sproc_stop,
+ .kick = sproc_kick,
+};
+
+/* STE modem device is unregistered */
+static int sproc_drv_remove(struct platform_device *pdev)
+{
+ struct ste_modem_device *mdev =
+ container_of(pdev, struct ste_modem_device, pdev);
+ struct sproc *sproc = mdev->drv_data;
+
+ sproc_dbg(sproc, "remove ste-modem\n");
+
+ /* Reset device callback functions */
+ sproc->mdev->ops.setup(sproc->mdev, NULL);
+
+ /* Unregister as remoteproc device */
+ rproc_del(sproc->rproc);
+ dma_free_coherent(sproc->rproc->dev.parent, SPROC_FW_SIZE,
+ sproc->fw_addr, sproc->fw_dma_addr);
+ rproc_put(sproc->rproc);
+
+ mdev->drv_data = NULL;
+
+ return 0;
+}
+
+/* Handle probe of a modem device */
+static int sproc_probe(struct platform_device *pdev)
+{
+ struct ste_modem_device *mdev =
+ container_of(pdev, struct ste_modem_device, pdev);
+ struct sproc *sproc;
+ struct rproc *rproc;
+ int err;
+
+ dev_dbg(&mdev->pdev.dev, "probe ste-modem\n");
+
+ if (!mdev->ops.setup || !mdev->ops.kick || !mdev->ops.kick_subscribe ||
+ !mdev->ops.power) {
+ dev_err(&mdev->pdev.dev, "invalid mdev ops\n");
+ return -EINVAL;
+ }
+
+ rproc = rproc_alloc(&mdev->pdev.dev, mdev->pdev.name, &sproc_ops,
+ SPROC_MODEM_FIRMWARE, sizeof(*sproc));
+ if (!rproc)
+ return -ENOMEM;
+
+ sproc = rproc->priv;
+ sproc->mdev = mdev;
+ sproc->rproc = rproc;
+ mdev->drv_data = sproc;
+
+ /* Provide callback functions to modem device */
+ sproc->mdev->ops.setup(sproc->mdev, &sproc_dev_cb);
+
+ /* Set the STE-modem specific firmware handler */
+ rproc->fw_ops = &sproc_fw_ops;
+
+ /*
+ * STE-modem requires the firmware to be located
+ * at the start of the shared memory region. So we need to
+ * reserve space for firmware at the start.
+ */
+ sproc->fw_addr = dma_alloc_coherent(rproc->dev.parent, SPROC_FW_SIZE,
+ &sproc->fw_dma_addr,
+ GFP_KERNEL);
+ if (!sproc->fw_addr) {
+ sproc_err(sproc, "Cannot allocate memory for fw\n");
+ err = -ENOMEM;
+ goto free_rproc;
+ }
+
+ /* Register as a remoteproc device */
+ err = rproc_add(rproc);
+ if (err)
+ goto free_mem;
+
+ return 0;
+
+free_mem:
+ dma_free_coherent(rproc->dev.parent, SPROC_FW_SIZE,
+ sproc->fw_addr, sproc->fw_dma_addr);
+free_rproc:
+ /* Reset device data upon error */
+ mdev->drv_data = NULL;
+ rproc_put(rproc);
+ return err;
+}
+
+static struct platform_driver sproc_driver = {
+ .driver = {
+ .name = SPROC_MODEM_NAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = sproc_probe,
+ .remove = sproc_drv_remove,
+};
+
+module_platform_driver(sproc_driver);
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("STE Modem driver using the Remote Processor Framework");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-14 13:33:45 +0000