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-rw-r--r--drivers/pci/hotplug/shpchp.h1
-rw-r--r--drivers/pci/hotplug/shpchp_ctrl.c120
-rw-r--r--drivers/pci/hotplug/shpchp_hpc.c25
3 files changed, 23 insertions, 123 deletions
diff --git a/drivers/pci/hotplug/shpchp.h b/drivers/pci/hotplug/shpchp.h
index f6d606d..b1e2a77 100644
--- a/drivers/pci/hotplug/shpchp.h
+++ b/drivers/pci/hotplug/shpchp.h
@@ -80,6 +80,7 @@ struct event_info {
struct controller {
struct list_head ctrl_list;
struct mutex crit_sect; /* critical section mutex */
+ struct mutex cmd_lock; /* command lock */
struct php_ctlr_state_s *hpc_ctlr_handle; /* HPC controller handle */
int num_slots; /* Number of slots on ctlr */
int slot_num_inc; /* 1 or -1 */
diff --git a/drivers/pci/hotplug/shpchp_ctrl.c b/drivers/pci/hotplug/shpchp_ctrl.c
index 3a8e733..802c4c4 100644
--- a/drivers/pci/hotplug/shpchp_ctrl.c
+++ b/drivers/pci/hotplug/shpchp_ctrl.c
@@ -242,21 +242,10 @@ static int change_bus_speed(struct controller *ctrl, struct slot *p_slot,
int rc = 0;
dbg("%s: change to speed %d\n", __FUNCTION__, speed);
- mutex_lock(&ctrl->crit_sect);
if ((rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, speed))) {
err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__);
- mutex_unlock(&ctrl->crit_sect);
- return WRONG_BUS_FREQUENCY;
- }
-
- if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
- err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n",
- __FUNCTION__);
- err("%s: Error code (%d)\n", __FUNCTION__, rc);
- mutex_unlock(&ctrl->crit_sect);
return WRONG_BUS_FREQUENCY;
}
- mutex_unlock(&ctrl->crit_sect);
return rc;
}
@@ -330,15 +319,6 @@ static int board_added(struct slot *p_slot)
return -1;
}
- rc = p_slot->hpc_ops->check_cmd_status(ctrl);
- if (rc) {
- err("%s: Failed to power on slot, error code(%d)\n", __FUNCTION__, rc);
- /* Done with exclusive hardware access */
- mutex_unlock(&ctrl->crit_sect);
- return -1;
- }
-
-
if ((ctrl->pci_dev->vendor == 0x8086) && (ctrl->pci_dev->device == 0x0332)) {
if (slots_not_empty)
return WRONG_BUS_FREQUENCY;
@@ -349,25 +329,12 @@ static int board_added(struct slot *p_slot)
return WRONG_BUS_FREQUENCY;
}
- if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
- err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n",
- __FUNCTION__);
- err("%s: Error code (%d)\n", __FUNCTION__, rc);
- mutex_unlock(&ctrl->crit_sect);
- return WRONG_BUS_FREQUENCY;
- }
/* turn on board, blink green LED, turn off Amber LED */
if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) {
err("%s: Issue of Slot Enable command failed\n", __FUNCTION__);
mutex_unlock(&ctrl->crit_sect);
return rc;
}
-
- if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
- err("%s: Failed to enable slot, error code(%d)\n", __FUNCTION__, rc);
- mutex_unlock(&ctrl->crit_sect);
- return rc;
- }
}
rc = p_slot->hpc_ops->get_adapter_speed(p_slot, &adapter_speed);
@@ -481,22 +448,12 @@ static int board_added(struct slot *p_slot)
return rc;
}
- mutex_lock(&ctrl->crit_sect);
/* turn on board, blink green LED, turn off Amber LED */
if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) {
err("%s: Issue of Slot Enable command failed\n", __FUNCTION__);
- mutex_unlock(&ctrl->crit_sect);
return rc;
}
- if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
- err("%s: Failed to enable slot, error code(%d)\n", __FUNCTION__, rc);
- mutex_unlock(&ctrl->crit_sect);
- return rc;
- }
-
- mutex_unlock(&ctrl->crit_sect);
-
/* Wait for ~1 second */
wait_for_ctrl_irq (ctrl);
@@ -520,40 +477,18 @@ static int board_added(struct slot *p_slot)
p_slot->is_a_board = 0x01;
p_slot->pwr_save = 1;
- /* Wait for exclusive access to hardware */
- mutex_lock(&ctrl->crit_sect);
-
p_slot->hpc_ops->green_led_on(p_slot);
- /* Done with exclusive hardware access */
- mutex_unlock(&ctrl->crit_sect);
-
return 0;
err_exit:
- /* Wait for exclusive access to hardware */
- mutex_lock(&ctrl->crit_sect);
-
/* turn off slot, turn on Amber LED, turn off Green LED */
rc = p_slot->hpc_ops->slot_disable(p_slot);
if (rc) {
err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
- /* Done with exclusive hardware access */
- mutex_unlock(&ctrl->crit_sect);
return rc;
}
- rc = p_slot->hpc_ops->check_cmd_status(ctrl);
- if (rc) {
- err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc);
- /* Done with exclusive hardware access */
- mutex_unlock(&ctrl->crit_sect);
- return rc;
- }
-
- /* Done with exclusive hardware access */
- mutex_unlock(&ctrl->crit_sect);
-
return(rc);
}
@@ -580,37 +515,19 @@ static int remove_board(struct slot *p_slot)
if (p_slot->is_a_board)
p_slot->status = 0x01;
- /* Wait for exclusive access to hardware */
- mutex_lock(&ctrl->crit_sect);
-
/* turn off slot, turn on Amber LED, turn off Green LED */
rc = p_slot->hpc_ops->slot_disable(p_slot);
if (rc) {
err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
- /* Done with exclusive hardware access */
- mutex_unlock(&ctrl->crit_sect);
return rc;
}
-
- rc = p_slot->hpc_ops->check_cmd_status(ctrl);
- if (rc) {
- err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc);
- /* Done with exclusive hardware access */
- mutex_unlock(&ctrl->crit_sect);
- return rc;
- }
rc = p_slot->hpc_ops->set_attention_status(p_slot, 0);
if (rc) {
err("%s: Issue of Set Attention command failed\n", __FUNCTION__);
- /* Done with exclusive hardware access */
- mutex_unlock(&ctrl->crit_sect);
return rc;
}
- /* Done with exclusive hardware access */
- mutex_unlock(&ctrl->crit_sect);
-
p_slot->pwr_save = 0;
p_slot->is_a_board = 0;
@@ -654,15 +571,9 @@ static void shpchp_pushbutton_thread (unsigned long slot)
} else {
p_slot->state = POWERON_STATE;
- if (shpchp_enable_slot(p_slot)) {
- /* Wait for exclusive access to hardware */
- mutex_lock(&p_slot->ctrl->crit_sect);
-
+ if (shpchp_enable_slot(p_slot))
p_slot->hpc_ops->green_led_off(p_slot);
- /* Done with exclusive hardware access */
- mutex_unlock(&p_slot->ctrl->crit_sect);
- }
p_slot->state = STATIC_STATE;
}
@@ -767,27 +678,12 @@ static void interrupt_event_handler(struct controller *ctrl)
switch (p_slot->state) {
case BLINKINGOFF_STATE:
- /* Wait for exclusive access to hardware */
- mutex_lock(&ctrl->crit_sect);
-
p_slot->hpc_ops->green_led_on(p_slot);
-
p_slot->hpc_ops->set_attention_status(p_slot, 0);
-
- /* Done with exclusive hardware access */
- mutex_unlock(&ctrl->crit_sect);
break;
case BLINKINGON_STATE:
- /* Wait for exclusive access to hardware */
- mutex_lock(&ctrl->crit_sect);
-
p_slot->hpc_ops->green_led_off(p_slot);
-
p_slot->hpc_ops->set_attention_status(p_slot, 0);
-
- /* Done with exclusive hardware access */
- mutex_unlock(&ctrl->crit_sect);
-
break;
default:
warn("Not a valid state\n");
@@ -812,17 +708,10 @@ static void interrupt_event_handler(struct controller *ctrl)
info(msg_button_on, p_slot->number);
}
- /* Wait for exclusive access to hardware */
- mutex_lock(&ctrl->crit_sect);
-
/* blink green LED and turn off amber */
p_slot->hpc_ops->green_led_blink(p_slot);
-
p_slot->hpc_ops->set_attention_status(p_slot, 0);
- /* Done with exclusive hardware access */
- mutex_unlock(&ctrl->crit_sect);
-
init_timer(&p_slot->task_event);
p_slot->task_event.expires = jiffies + 5 * HZ; /* 5 second delay */
p_slot->task_event.function = (void (*)(unsigned long)) pushbutton_helper_thread;
@@ -833,15 +722,8 @@ static void interrupt_event_handler(struct controller *ctrl)
} else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) {
/***********POWER FAULT********************/
dbg("%s: power fault\n", __FUNCTION__);
- /* Wait for exclusive access to hardware */
- mutex_lock(&ctrl->crit_sect);
-
p_slot->hpc_ops->set_attention_status(p_slot, 1);
-
p_slot->hpc_ops->green_led_off(p_slot);
-
- /* Done with exclusive hardware access */
- mutex_unlock(&ctrl->crit_sect);
} else {
/* refresh notification */
if (p_slot)
diff --git a/drivers/pci/hotplug/shpchp_hpc.c b/drivers/pci/hotplug/shpchp_hpc.c
index ae81427..c32a1b1 100644
--- a/drivers/pci/hotplug/shpchp_hpc.c
+++ b/drivers/pci/hotplug/shpchp_hpc.c
@@ -231,6 +231,7 @@ static spinlock_t list_lock;
static irqreturn_t shpc_isr(int IRQ, void *dev_id, struct pt_regs *regs);
static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int seconds);
+static int hpc_check_cmd_status(struct controller *ctrl);
/* This is the interrupt polling timeout function. */
static void int_poll_timeout(unsigned long lphp_ctlr)
@@ -303,10 +304,13 @@ static int shpc_write_cmd(struct slot *slot, u8 t_slot, u8 cmd)
int i;
DBG_ENTER_ROUTINE
-
+
+ mutex_lock(&slot->ctrl->cmd_lock);
+
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
- return -1;
+ retval = -EINVAL;
+ goto out;
}
for (i = 0; i < 10; i++) {
@@ -323,7 +327,8 @@ static int shpc_write_cmd(struct slot *slot, u8 t_slot, u8 cmd)
if (cmd_status & 0x1) {
/* After 1 sec and and the controller is still busy */
err("%s : Controller is still busy after 1 sec.\n", __FUNCTION__);
- return -1;
+ retval = -EBUSY;
+ goto out;
}
++t_slot;
@@ -340,6 +345,17 @@ static int shpc_write_cmd(struct slot *slot, u8 t_slot, u8 cmd)
* Wait for command completion.
*/
retval = shpc_wait_cmd(slot->ctrl);
+ if (retval)
+ goto out;
+
+ cmd_status = hpc_check_cmd_status(slot->ctrl);
+ if (cmd_status) {
+ err("%s: Failed to issued command 0x%x (error code = %d)\n",
+ __FUNCTION__, cmd, cmd_status);
+ retval = -EIO;
+ }
+ out:
+ mutex_unlock(&slot->ctrl->cmd_lock);
DBG_LEAVE_ROUTINE
return retval;
@@ -1343,7 +1359,6 @@ static struct hpc_ops shpchp_hpc_ops = {
.green_led_blink = hpc_set_green_led_blink,
.release_ctlr = hpc_release_ctlr,
- .check_cmd_status = hpc_check_cmd_status,
};
inline static int shpc_indirect_creg_read(struct controller *ctrl, int index,
@@ -1455,6 +1470,8 @@ int shpc_init(struct controller * ctrl, struct pci_dev * pdev)
dbg("%s: php_ctlr->creg %p\n", __FUNCTION__, php_ctlr->creg);
mutex_init(&ctrl->crit_sect);
+ mutex_init(&ctrl->cmd_lock);
+
/* Setup wait queue */
init_waitqueue_head(&ctrl->queue);
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