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path: root/drivers/pci/hotplug/ibmphp_hpc.c
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Diffstat (limited to 'drivers/pci/hotplug/ibmphp_hpc.c')
-rw-r--r--drivers/pci/hotplug/ibmphp_hpc.c106
1 files changed, 54 insertions, 52 deletions
diff --git a/drivers/pci/hotplug/ibmphp_hpc.c b/drivers/pci/hotplug/ibmphp_hpc.c
index c31e7bf3450..a936022956e 100644
--- a/drivers/pci/hotplug/ibmphp_hpc.c
+++ b/drivers/pci/hotplug/ibmphp_hpc.c
@@ -35,6 +35,7 @@
#include <linux/init.h>
#include <linux/mutex.h>
#include <linux/sched.h>
+#include <linux/semaphore.h>
#include <linux/kthread.h>
#include "ibmphp.h"
@@ -129,14 +130,14 @@ static int hpc_wait_ctlr_notworking (int, struct controller *, void __iomem *, u
*---------------------------------------------------------------------*/
void __init ibmphp_hpc_initvars (void)
{
- debug ("%s - Entry\n", __FUNCTION__);
+ debug ("%s - Entry\n", __func__);
mutex_init(&sem_hpcaccess);
- init_MUTEX (&semOperations);
- init_MUTEX_LOCKED (&sem_exit);
+ sema_init(&semOperations, 1);
+ sema_init(&sem_exit, 0);
to_debug = 0;
- debug ("%s - Exit\n", __FUNCTION__);
+ debug ("%s - Exit\n", __func__);
}
/*----------------------------------------------------------------------
@@ -154,7 +155,7 @@ static u8 i2c_ctrl_read (struct controller *ctlr_ptr, void __iomem *WPGBbar, u8
unsigned long ultemp;
unsigned long data; // actual data HILO format
- debug_polling ("%s - Entry WPGBbar[%p] index[%x] \n", __FUNCTION__, WPGBbar, index);
+ debug_polling ("%s - Entry WPGBbar[%p] index[%x] \n", __func__, WPGBbar, index);
//--------------------------------------------------------------------
// READ - step 1
@@ -213,7 +214,7 @@ static u8 i2c_ctrl_read (struct controller *ctlr_ptr, void __iomem *WPGBbar, u8
i--;
}
if (i == 0) {
- debug ("%s - Error : WPG timeout\n", __FUNCTION__);
+ debug ("%s - Error : WPG timeout\n", __func__);
return HPC_ERROR;
}
//--------------------------------------------------------------------
@@ -241,7 +242,7 @@ static u8 i2c_ctrl_read (struct controller *ctlr_ptr, void __iomem *WPGBbar, u8
status = (u8) data;
- debug_polling ("%s - Exit index[%x] status[%x]\n", __FUNCTION__, index, status);
+ debug_polling ("%s - Exit index[%x] status[%x]\n", __func__, index, status);
return (status);
}
@@ -257,12 +258,12 @@ static u8 i2c_ctrl_write (struct controller *ctlr_ptr, void __iomem *WPGBbar, u8
{
u8 rc;
void __iomem *wpg_addr; // base addr + offset
- unsigned long wpg_data; // data to/from WPG LOHI format
+ unsigned long wpg_data; // data to/from WPG LOHI format
unsigned long ultemp;
unsigned long data; // actual data HILO format
int i;
- debug_polling ("%s - Entry WPGBbar[%p] index[%x] cmd[%x]\n", __FUNCTION__, WPGBbar, index, cmd);
+ debug_polling ("%s - Entry WPGBbar[%p] index[%x] cmd[%x]\n", __func__, WPGBbar, index, cmd);
rc = 0;
//--------------------------------------------------------------------
@@ -324,7 +325,7 @@ static u8 i2c_ctrl_write (struct controller *ctlr_ptr, void __iomem *WPGBbar, u8
i--;
}
if (i == 0) {
- debug ("%s - Exit Error:WPG timeout\n", __FUNCTION__);
+ debug ("%s - Exit Error:WPG timeout\n", __func__);
rc = HPC_ERROR;
}
@@ -345,12 +346,12 @@ static u8 i2c_ctrl_write (struct controller *ctlr_ptr, void __iomem *WPGBbar, u8
rc = HPC_ERROR;
}
- debug_polling ("%s Exit rc[%x]\n", __FUNCTION__, rc);
+ debug_polling ("%s Exit rc[%x]\n", __func__, rc);
return (rc);
}
//------------------------------------------------------------
-// Read from ISA type HPC
+// Read from ISA type HPC
//------------------------------------------------------------
static u8 isa_ctrl_read (struct controller *ctlr_ptr, u8 offset)
{
@@ -371,7 +372,7 @@ static void isa_ctrl_write (struct controller *ctlr_ptr, u8 offset, u8 data)
{
u16 start_address;
u16 port_address;
-
+
start_address = ctlr_ptr->u.isa_ctlr.io_start;
port_address = start_address + (u16) offset;
outb (data, port_address);
@@ -532,7 +533,7 @@ static u8 hpc_readcmdtoindex (u8 cmd, u8 index)
*
* Return 0 or error codes
*---------------------------------------------------------------------*/
-int ibmphp_hpc_readslot (struct slot * pslot, u8 cmd, u8 * pstatus)
+int ibmphp_hpc_readslot (struct slot *pslot, u8 cmd, u8 *pstatus)
{
void __iomem *wpg_bbar = NULL;
struct controller *ctlr_ptr;
@@ -541,12 +542,12 @@ int ibmphp_hpc_readslot (struct slot * pslot, u8 cmd, u8 * pstatus)
int rc = 0;
int busindex;
- debug_polling ("%s - Entry pslot[%p] cmd[%x] pstatus[%p]\n", __FUNCTION__, pslot, cmd, pstatus);
+ debug_polling ("%s - Entry pslot[%p] cmd[%x] pstatus[%p]\n", __func__, pslot, cmd, pstatus);
if ((pslot == NULL)
|| ((pstatus == NULL) && (cmd != READ_ALLSTAT) && (cmd != READ_BUSSTATUS))) {
rc = -EINVAL;
- err ("%s - Error invalid pointer, rc[%d]\n", __FUNCTION__, rc);
+ err ("%s - Error invalid pointer, rc[%d]\n", __func__, rc);
return rc;
}
@@ -554,7 +555,7 @@ int ibmphp_hpc_readslot (struct slot * pslot, u8 cmd, u8 * pstatus)
busindex = ibmphp_get_bus_index (pslot->bus);
if (busindex < 0) {
rc = -EINVAL;
- err ("%s - Exit Error:invalid bus, rc[%d]\n", __FUNCTION__, rc);
+ err ("%s - Exit Error:invalid bus, rc[%d]\n", __func__, rc);
return rc;
} else
index = (u8) busindex;
@@ -565,7 +566,7 @@ int ibmphp_hpc_readslot (struct slot * pslot, u8 cmd, u8 * pstatus)
if (index == HPC_ERROR) {
rc = -EINVAL;
- err ("%s - Exit Error:invalid index, rc[%d]\n", __FUNCTION__, rc);
+ err ("%s - Exit Error:invalid index, rc[%d]\n", __func__, rc);
return rc;
}
@@ -641,7 +642,7 @@ int ibmphp_hpc_readslot (struct slot * pslot, u8 cmd, u8 * pstatus)
ctrl_read (ctlr_ptr, wpg_bbar,
index + WPG_1ST_EXTSLOT_INDEX);
} else {
- err ("%s - Error ctrl_read failed\n", __FUNCTION__);
+ err ("%s - Error ctrl_read failed\n", __func__);
rc = -EINVAL;
break;
}
@@ -655,14 +656,14 @@ int ibmphp_hpc_readslot (struct slot * pslot, u8 cmd, u8 * pstatus)
//--------------------------------------------------------------------
// cleanup
//--------------------------------------------------------------------
-
+
// remove physical to logical address mapping
if ((ctlr_ptr->ctlr_type == 2) || (ctlr_ptr->ctlr_type == 4))
iounmap (wpg_bbar);
-
+
free_hpc_access ();
- debug_polling ("%s - Exit rc[%d]\n", __FUNCTION__, rc);
+ debug_polling ("%s - Exit rc[%d]\n", __func__, rc);
return rc;
}
@@ -671,7 +672,7 @@ int ibmphp_hpc_readslot (struct slot * pslot, u8 cmd, u8 * pstatus)
*
* Action: issue a WRITE command to HPC
*---------------------------------------------------------------------*/
-int ibmphp_hpc_writeslot (struct slot * pslot, u8 cmd)
+int ibmphp_hpc_writeslot (struct slot *pslot, u8 cmd)
{
void __iomem *wpg_bbar = NULL;
struct controller *ctlr_ptr;
@@ -681,10 +682,10 @@ int ibmphp_hpc_writeslot (struct slot * pslot, u8 cmd)
int rc = 0;
int timeout;
- debug_polling ("%s - Entry pslot[%p] cmd[%x]\n", __FUNCTION__, pslot, cmd);
+ debug_polling ("%s - Entry pslot[%p] cmd[%x]\n", __func__, pslot, cmd);
if (pslot == NULL) {
rc = -EINVAL;
- err ("%s - Error Exit rc[%d]\n", __FUNCTION__, rc);
+ err ("%s - Error Exit rc[%d]\n", __func__, rc);
return rc;
}
@@ -694,7 +695,7 @@ int ibmphp_hpc_writeslot (struct slot * pslot, u8 cmd)
busindex = ibmphp_get_bus_index (pslot->bus);
if (busindex < 0) {
rc = -EINVAL;
- err ("%s - Exit Error:invalid bus, rc[%d]\n", __FUNCTION__, rc);
+ err ("%s - Exit Error:invalid bus, rc[%d]\n", __func__, rc);
return rc;
} else
index = (u8) busindex;
@@ -705,7 +706,7 @@ int ibmphp_hpc_writeslot (struct slot * pslot, u8 cmd)
if (index == HPC_ERROR) {
rc = -EINVAL;
- err ("%s - Error Exit rc[%d]\n", __FUNCTION__, rc);
+ err ("%s - Error Exit rc[%d]\n", __func__, rc);
return rc;
}
@@ -719,7 +720,7 @@ int ibmphp_hpc_writeslot (struct slot * pslot, u8 cmd)
if ((ctlr_ptr->ctlr_type == 2) || (ctlr_ptr->ctlr_type == 4)) {
wpg_bbar = ioremap (ctlr_ptr->u.wpeg_ctlr.wpegbbar, WPG_I2C_IOREMAP_SIZE);
- debug ("%s - ctlr id[%x] physical[%lx] logical[%lx] i2c[%x]\n", __FUNCTION__,
+ debug ("%s - ctlr id[%x] physical[%lx] logical[%lx] i2c[%x]\n", __func__,
ctlr_ptr->ctlr_id, (ulong) (ctlr_ptr->u.wpeg_ctlr.wpegbbar), (ulong) wpg_bbar,
ctlr_ptr->u.wpeg_ctlr.i2c_addr);
}
@@ -750,7 +751,7 @@ int ibmphp_hpc_writeslot (struct slot * pslot, u8 cmd)
msleep(1000);
if (timeout < 1) {
done = 1;
- err ("%s - Error command complete timeout\n", __FUNCTION__);
+ err ("%s - Error command complete timeout\n", __func__);
rc = -EFAULT;
} else
timeout--;
@@ -765,7 +766,7 @@ int ibmphp_hpc_writeslot (struct slot * pslot, u8 cmd)
iounmap (wpg_bbar);
free_hpc_access ();
- debug_polling ("%s - Exit rc[%d]\n", __FUNCTION__, rc);
+ debug_polling ("%s - Exit rc[%d]\n", __func__, rc);
return rc;
}
@@ -803,10 +804,10 @@ void ibmphp_lock_operations (void)
*---------------------------------------------------------------------*/
void ibmphp_unlock_operations (void)
{
- debug ("%s - Entry\n", __FUNCTION__);
+ debug ("%s - Entry\n", __func__);
up (&semOperations);
to_debug = 0;
- debug ("%s - Exit\n", __FUNCTION__);
+ debug ("%s - Exit\n", __func__);
}
/*----------------------------------------------------------------------
@@ -827,14 +828,14 @@ static int poll_hpc(void *data)
int poll_count = 0;
u8 ctrl_count = 0x00;
- debug ("%s - Entry\n", __FUNCTION__);
+ debug ("%s - Entry\n", __func__);
while (!kthread_should_stop()) {
/* try to get the lock to do some kind of hardware access */
down (&semOperations);
switch (poll_state) {
- case POLL_LATCH_REGISTER:
+ case POLL_LATCH_REGISTER:
oldlatchlow = curlatchlow;
ctrl_count = 0x00;
list_for_each (pslotlist, &ibmphp_slot_head) {
@@ -890,24 +891,25 @@ static int poll_hpc(void *data)
msleep(POLL_INTERVAL_SEC * 1000);
if (kthread_should_stop())
- break;
-
+ goto out_sleep;
+
down (&semOperations);
-
+
if (poll_count >= POLL_LATCH_CNT) {
poll_count = 0;
poll_state = POLL_SLOTS;
} else
poll_state = POLL_LATCH_REGISTER;
break;
- }
+ }
/* give up the hardware semaphore */
up (&semOperations);
/* sleep for a short time just for good measure */
+out_sleep:
msleep(100);
}
up (&sem_exit);
- debug ("%s - Exit\n", __FUNCTION__);
+ debug ("%s - Exit\n", __func__);
return 0;
}
@@ -956,7 +958,7 @@ static int process_changeinstatus (struct slot *pslot, struct slot *poldslot)
// bit 5 - HPC_SLOT_PWRGD
if ((pslot->status & 0x20) != (poldslot->status & 0x20))
// OFF -> ON: ignore, ON -> OFF: disable slot
- if ((poldslot->status & 0x20) && (SLOT_CONNECT (poldslot->status) == HPC_SLOT_CONNECTED) && (SLOT_PRESENT (poldslot->status)))
+ if ((poldslot->status & 0x20) && (SLOT_CONNECT (poldslot->status) == HPC_SLOT_CONNECTED) && (SLOT_PRESENT (poldslot->status)))
disable = 1;
// bit 6 - HPC_SLOT_BUS_SPEED
@@ -978,7 +980,7 @@ static int process_changeinstatus (struct slot *pslot, struct slot *poldslot)
pslot->status &= ~HPC_SLOT_POWER;
}
}
- // CLOSE -> OPEN
+ // CLOSE -> OPEN
else if ((SLOT_PWRGD (poldslot->status) == HPC_SLOT_PWRGD_GOOD)
&& (SLOT_CONNECT (poldslot->status) == HPC_SLOT_CONNECTED) && (SLOT_PRESENT (poldslot->status))) {
disable = 1;
@@ -999,7 +1001,7 @@ static int process_changeinstatus (struct slot *pslot, struct slot *poldslot)
ibmphp_update_slot_info (pslot);
}
- debug ("%s - Exit rc[%d] disable[%x] update[%x]\n", __FUNCTION__, rc, disable, update);
+ debug ("%s - Exit rc[%d] disable[%x] update[%x]\n", __func__, rc, disable, update);
return rc;
}
@@ -1021,7 +1023,7 @@ static int process_changeinlatch (u8 old, u8 new, struct controller *ctrl)
u8 mask;
int rc = 0;
- debug ("%s - Entry old[%x], new[%x]\n", __FUNCTION__, old, new);
+ debug ("%s - Entry old[%x], new[%x]\n", __func__, old, new);
// bit 0 reserved, 0 is LSB, check bit 1-6 for 6 slots
for (i = ctrl->starting_slot_num; i <= ctrl->ending_slot_num; i++) {
@@ -1031,15 +1033,15 @@ static int process_changeinlatch (u8 old, u8 new, struct controller *ctrl)
if (pslot) {
memcpy ((void *) &myslot, (void *) pslot, sizeof (struct slot));
rc = ibmphp_hpc_readslot (pslot, READ_ALLSTAT, NULL);
- debug ("%s - call process_changeinstatus for slot[%d]\n", __FUNCTION__, i);
+ debug ("%s - call process_changeinstatus for slot[%d]\n", __func__, i);
process_changeinstatus (pslot, &myslot);
} else {
rc = -EINVAL;
- err ("%s - Error bad pointer for slot[%d]\n", __FUNCTION__, i);
+ err ("%s - Error bad pointer for slot[%d]\n", __func__, i);
}
}
}
- debug ("%s - Exit rc[%d]\n", __FUNCTION__, rc);
+ debug ("%s - Exit rc[%d]\n", __func__, rc);
return rc;
}
@@ -1050,11 +1052,11 @@ static int process_changeinlatch (u8 old, u8 new, struct controller *ctrl)
*---------------------------------------------------------------------*/
int __init ibmphp_hpc_start_poll_thread (void)
{
- debug ("%s - Entry\n", __FUNCTION__);
+ debug ("%s - Entry\n", __func__);
ibmphp_poll_thread = kthread_run(poll_hpc, NULL, "hpc_poll");
if (IS_ERR(ibmphp_poll_thread)) {
- err ("%s - Error, thread not started\n", __FUNCTION__);
+ err ("%s - Error, thread not started\n", __func__);
return PTR_ERR(ibmphp_poll_thread);
}
return 0;
@@ -1067,13 +1069,13 @@ int __init ibmphp_hpc_start_poll_thread (void)
*---------------------------------------------------------------------*/
void __exit ibmphp_hpc_stop_poll_thread (void)
{
- debug ("%s - Entry\n", __FUNCTION__);
+ debug ("%s - Entry\n", __func__);
kthread_stop(ibmphp_poll_thread);
debug ("before locking operations \n");
ibmphp_lock_operations ();
debug ("after locking operations \n");
-
+
// wait for poll thread to exit
debug ("before sem_exit down \n");
down (&sem_exit);
@@ -1088,7 +1090,7 @@ void __exit ibmphp_hpc_stop_poll_thread (void)
up (&sem_exit);
debug ("after sem exit up\n");
- debug ("%s - Exit\n", __FUNCTION__);
+ debug ("%s - Exit\n", __func__);
}
/*----------------------------------------------------------------------
@@ -1100,7 +1102,7 @@ void __exit ibmphp_hpc_stop_poll_thread (void)
* Value:
*---------------------------------------------------------------------*/
static int hpc_wait_ctlr_notworking (int timeout, struct controller *ctlr_ptr, void __iomem *wpg_bbar,
- u8 * pstatus)
+ u8 *pstatus)
{
int rc = 0;
u8 done = 0;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 03:23:54 +0000