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path: root/drivers/pci/hotplug/pciehp_hpc.c
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Diffstat (limited to 'drivers/pci/hotplug/pciehp_hpc.c')
-rw-r--r--drivers/pci/hotplug/pciehp_hpc.c125
1 files changed, 44 insertions, 81 deletions
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 7a0e27f0e06..0b8b26beb16 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -27,16 +27,12 @@
*
*/
-#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-#include <linux/interrupt.h>
-#include <linux/spinlock.h>
#include <linux/pci.h>
-#include <asm/system.h>
+#include <linux/interrupt.h>
+
#include "../pci.h"
#include "pciehp.h"
@@ -217,23 +213,6 @@ static int pcie_cap_base = 0; /* Base of the PCI Express capability item struct
#define MRL_STATE 0x0020
#define PRSN_STATE 0x0040
-struct php_ctlr_state_s {
- struct php_ctlr_state_s *pnext;
- struct pci_dev *pci_dev;
- unsigned int irq;
- unsigned long flags; /* spinlock's */
- u32 slot_device_offset;
- u32 num_slots;
- struct timer_list int_poll_timer; /* Added for poll event */
- php_intr_callback_t attention_button_callback;
- php_intr_callback_t switch_change_callback;
- php_intr_callback_t presence_change_callback;
- php_intr_callback_t power_fault_callback;
- void *callback_instance_id;
- struct ctrl_reg *creg; /* Ptr to controller register space */
-};
-
-
static spinlock_t hpc_event_lock;
DEFINE_DBG_BUFFER /* Debug string buffer for entire HPC defined here */
@@ -297,7 +276,6 @@ static int pcie_write_cmd(struct slot *slot, u16 cmd)
DBG_ENTER_ROUTINE
- dbg("%s : Enter\n", __FUNCTION__);
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return -1;
@@ -308,7 +286,6 @@ static int pcie_write_cmd(struct slot *slot, u16 cmd)
err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
return retval;
}
- dbg("%s : hp_register_read_word SLOT_STATUS %x\n", __FUNCTION__, slot_status);
if ((slot_status & CMD_COMPLETED) == CMD_COMPLETED ) {
/* After 1 sec and CMD_COMPLETED still not set, just proceed forward to issue
@@ -316,14 +293,11 @@ static int pcie_write_cmd(struct slot *slot, u16 cmd)
dbg("%s : CMD_COMPLETED not clear after 1 sec.\n", __FUNCTION__);
}
- dbg("%s: Before hp_register_write_word SLOT_CTRL %x\n", __FUNCTION__, cmd);
retval = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), cmd | CMD_CMPL_INTR_ENABLE);
if (retval) {
err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
return retval;
}
- dbg("%s : hp_register_write_word SLOT_CTRL %x\n", __FUNCTION__, cmd | CMD_CMPL_INTR_ENABLE);
- dbg("%s : Exit\n", __FUNCTION__);
DBG_LEAVE_ROUTINE
return retval;
@@ -509,7 +483,6 @@ static int hpc_query_power_fault(struct slot * slot)
u16 slot_status;
u8 pwr_fault;
int retval = 0;
- u8 status;
DBG_ENTER_ROUTINE
@@ -521,15 +494,13 @@ static int hpc_query_power_fault(struct slot * slot)
retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(slot->ctrl->cap_base), slot_status);
if (retval) {
- err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
+ err("%s : Cannot check for power fault\n", __FUNCTION__);
return retval;
}
pwr_fault = (u8)((slot_status & PWR_FAULT_DETECTED) >> 1);
- status = (pwr_fault != 1) ? 1 : 0;
DBG_LEAVE_ROUTINE
- /* Note: Logic 0 => fault */
- return status;
+ return pwr_fault;
}
static int hpc_set_attention_status(struct slot *slot, u8 value)
@@ -539,7 +510,8 @@ static int hpc_set_attention_status(struct slot *slot, u8 value)
u16 slot_ctrl;
int rc = 0;
- dbg("%s: \n", __FUNCTION__);
+ DBG_ENTER_ROUTINE
+
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return -1;
@@ -555,7 +527,6 @@ static int hpc_set_attention_status(struct slot *slot, u8 value)
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
return rc;
}
- dbg("%s : hp_register_read_word SLOT_CTRL %x\n", __FUNCTION__, slot_ctrl);
switch (value) {
case 0 : /* turn off */
@@ -576,6 +547,7 @@ static int hpc_set_attention_status(struct slot *slot, u8 value)
pcie_write_cmd(slot, slot_cmd);
dbg("%s: SLOT_CTRL %x write cmd %x\n", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
+ DBG_LEAVE_ROUTINE
return rc;
}
@@ -587,7 +559,8 @@ static void hpc_set_green_led_on(struct slot *slot)
u16 slot_ctrl;
int rc = 0;
- dbg("%s: \n", __FUNCTION__);
+ DBG_ENTER_ROUTINE
+
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return ;
@@ -604,7 +577,6 @@ static void hpc_set_green_led_on(struct slot *slot)
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
return;
}
- dbg("%s : hp_register_read_word SLOT_CTRL %x\n", __FUNCTION__, slot_ctrl);
slot_cmd = (slot_ctrl & ~PWR_LED_CTRL) | 0x0100;
if (!pciehp_poll_mode)
slot_cmd = slot_cmd | HP_INTR_ENABLE;
@@ -612,6 +584,7 @@ static void hpc_set_green_led_on(struct slot *slot)
pcie_write_cmd(slot, slot_cmd);
dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
+ DBG_LEAVE_ROUTINE
return;
}
@@ -622,7 +595,8 @@ static void hpc_set_green_led_off(struct slot *slot)
u16 slot_ctrl;
int rc = 0;
- dbg("%s: \n", __FUNCTION__);
+ DBG_ENTER_ROUTINE
+
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return ;
@@ -639,7 +613,6 @@ static void hpc_set_green_led_off(struct slot *slot)
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
return;
}
- dbg("%s : hp_register_read_word SLOT_CTRL %x\n", __FUNCTION__, slot_ctrl);
slot_cmd = (slot_ctrl & ~PWR_LED_CTRL) | 0x0300;
@@ -648,6 +621,7 @@ static void hpc_set_green_led_off(struct slot *slot)
pcie_write_cmd(slot, slot_cmd);
dbg("%s: SLOT_CTRL %x write cmd %x\n", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
+ DBG_LEAVE_ROUTINE
return;
}
@@ -658,7 +632,8 @@ static void hpc_set_green_led_blink(struct slot *slot)
u16 slot_ctrl;
int rc = 0;
- dbg("%s: \n", __FUNCTION__);
+ DBG_ENTER_ROUTINE
+
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return ;
@@ -675,7 +650,6 @@ static void hpc_set_green_led_blink(struct slot *slot)
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
return;
}
- dbg("%s : hp_register_read_word SLOT_CTRL %x\n", __FUNCTION__, slot_ctrl);
slot_cmd = (slot_ctrl & ~PWR_LED_CTRL) | 0x0200;
@@ -684,6 +658,7 @@ static void hpc_set_green_led_blink(struct slot *slot)
pcie_write_cmd(slot, slot_cmd);
dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
+ DBG_LEAVE_ROUTINE
return;
}
@@ -775,12 +750,11 @@ static int hpc_power_on_slot(struct slot * slot)
{
struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
u16 slot_cmd;
- u16 slot_ctrl;
+ u16 slot_ctrl, slot_status;
int retval = 0;
DBG_ENTER_ROUTINE
- dbg("%s: \n", __FUNCTION__);
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
@@ -793,14 +767,20 @@ static int hpc_power_on_slot(struct slot * slot)
return -1;
}
+ /* Clear sticky power-fault bit from previous power failures */
+ hp_register_read_word(php_ctlr->pci_dev,
+ SLOT_STATUS(slot->ctrl->cap_base), slot_status);
+ slot_status &= PWR_FAULT_DETECTED;
+ if (slot_status)
+ hp_register_write_word(php_ctlr->pci_dev,
+ SLOT_STATUS(slot->ctrl->cap_base), slot_status);
+
retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
if (retval) {
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
return retval;
}
- dbg("%s: SLOT_CTRL %x, value read %xn", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base),
- slot_ctrl);
slot_cmd = (slot_ctrl & ~PWR_CTRL) | POWER_ON;
@@ -829,7 +809,6 @@ static int hpc_power_off_slot(struct slot * slot)
int retval = 0;
DBG_ENTER_ROUTINE
- dbg("%s: \n", __FUNCTION__);
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
@@ -848,8 +827,6 @@ static int hpc_power_off_slot(struct slot * slot)
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
return retval;
}
- dbg("%s: SLOT_CTRL %x, value read %x\n", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base),
- slot_ctrl);
slot_cmd = (slot_ctrl & ~PWR_CTRL) | POWER_OFF;
@@ -924,7 +901,6 @@ static irqreturn_t pcie_isr(int IRQ, void *dev_id, struct pt_regs *regs)
return IRQ_NONE;
}
- dbg("%s: Set Mask Hot-plug Interrupt Enable\n", __FUNCTION__);
dbg("%s: hp_register_read_word SLOT_CTRL with value %x\n", __FUNCTION__, temp_word);
temp_word = (temp_word & ~HP_INTR_ENABLE & ~CMD_CMPL_INTR_ENABLE) | 0x00;
@@ -933,7 +909,6 @@ static irqreturn_t pcie_isr(int IRQ, void *dev_id, struct pt_regs *regs)
err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
return IRQ_NONE;
}
- dbg("%s: hp_register_write_word SLOT_CTRL with value %x\n", __FUNCTION__, temp_word);
rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
if (rc) {
@@ -949,14 +924,12 @@ static irqreturn_t pcie_isr(int IRQ, void *dev_id, struct pt_regs *regs)
err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
return IRQ_NONE;
}
- dbg("%s: hp_register_write_word SLOT_STATUS with value %x\n", __FUNCTION__, temp_word);
}
if (intr_loc & CMD_COMPLETED) {
/*
* Command Complete Interrupt Pending
*/
- dbg("%s: In Command Complete Interrupt Pending\n", __FUNCTION__);
wake_up_interruptible(&ctrl->queue);
}
@@ -989,7 +962,6 @@ static irqreturn_t pcie_isr(int IRQ, void *dev_id, struct pt_regs *regs)
}
dbg("%s: Unmask Hot-plug Interrupt Enable\n", __FUNCTION__);
- dbg("%s: hp_register_read_word SLOT_CTRL with value %x\n", __FUNCTION__, temp_word);
temp_word = (temp_word & ~HP_INTR_ENABLE) | HP_INTR_ENABLE;
rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), temp_word);
@@ -997,14 +969,12 @@ static irqreturn_t pcie_isr(int IRQ, void *dev_id, struct pt_regs *regs)
err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
return IRQ_NONE;
}
- dbg("%s: hp_register_write_word SLOT_CTRL with value %x\n", __FUNCTION__, temp_word);
rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
if (rc) {
err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
return IRQ_NONE;
}
- dbg("%s: hp_register_read_word SLOT_STATUS with value %x\n", __FUNCTION__, slot_status);
/* Clear command complete interrupt caused by this write */
temp_word = 0x1F;
@@ -1248,12 +1218,7 @@ static struct hpc_ops pciehp_hpc_ops = {
.check_lnk_status = hpc_check_lnk_status,
};
-int pcie_init(struct controller * ctrl,
- struct pcie_device *dev,
- php_intr_callback_t attention_button_callback,
- php_intr_callback_t switch_change_callback,
- php_intr_callback_t presence_change_callback,
- php_intr_callback_t power_fault_callback)
+int pcie_init(struct controller * ctrl, struct pcie_device *dev)
{
struct php_ctlr_state_s *php_ctlr, *p;
void *instance_id = ctrl;
@@ -1282,8 +1247,8 @@ int pcie_init(struct controller * ctrl,
pdev = dev->port;
php_ctlr->pci_dev = pdev; /* save pci_dev in context */
- dbg("%s: pdev->vendor %x pdev->device %x\n", __FUNCTION__,
- pdev->vendor, pdev->device);
+ dbg("%s: hotplug controller vendor id 0x%x device id 0x%x\n",
+ __FUNCTION__, pdev->vendor, pdev->device);
saved_cap_base = pcie_cap_base;
@@ -1340,8 +1305,6 @@ int pcie_init(struct controller * ctrl,
first = 0;
}
- dbg("pdev = %p: b:d:f:irq=0x%x:%x:%x:%x\n", pdev, pdev->bus->number,
- PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), dev->irq);
for ( rc = 0; rc < DEVICE_COUNT_RESOURCE; rc++)
if (pci_resource_len(pdev, rc) > 0)
dbg("pci resource[%d] start=0x%lx(len=0x%lx)\n", rc,
@@ -1359,13 +1322,12 @@ int pcie_init(struct controller * ctrl,
/* find the IRQ */
php_ctlr->irq = dev->irq;
- dbg("HPC interrupt = %d\n", php_ctlr->irq);
/* Save interrupt callback info */
- php_ctlr->attention_button_callback = attention_button_callback;
- php_ctlr->switch_change_callback = switch_change_callback;
- php_ctlr->presence_change_callback = presence_change_callback;
- php_ctlr->power_fault_callback = power_fault_callback;
+ php_ctlr->attention_button_callback = pciehp_handle_attention_button;
+ php_ctlr->switch_change_callback = pciehp_handle_switch_change;
+ php_ctlr->presence_change_callback = pciehp_handle_presence_change;
+ php_ctlr->power_fault_callback = pciehp_handle_power_fault;
php_ctlr->callback_instance_id = instance_id;
/* return PCI Controller Info */
@@ -1387,15 +1349,12 @@ int pcie_init(struct controller * ctrl,
err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
goto abort_free_ctlr;
}
- dbg("%s : Mask HPIE hp_register_write_word SLOT_CTRL %x\n", __FUNCTION__, temp_word);
rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
if (rc) {
err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
goto abort_free_ctlr;
}
- dbg("%s: Mask HPIE SLOT_STATUS offset %x reads slot_status %x\n", __FUNCTION__, SLOT_STATUS(ctrl->cap_base)
- , slot_status);
temp_word = 0x1F; /* Clear all events */
rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
@@ -1403,7 +1362,6 @@ int pcie_init(struct controller * ctrl,
err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
goto abort_free_ctlr;
}
- dbg("%s: SLOT_STATUS offset %x writes slot_status %x\n", __FUNCTION__, SLOT_STATUS(ctrl->cap_base), temp_word);
if (pciehp_poll_mode) {/* Install interrupt polling code */
/* Install and start the interrupt polling timer */
@@ -1419,13 +1377,14 @@ int pcie_init(struct controller * ctrl,
}
}
+ dbg("pciehp ctrl b:d:f:irq=0x%x:%x:%x:%x\n", pdev->bus->number,
+ PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), dev->irq);
+
rc = hp_register_read_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
if (rc) {
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
goto abort_free_ctlr;
}
- dbg("%s: SLOT_CTRL %x value read %x\n", __FUNCTION__, SLOT_CTRL(ctrl->cap_base), temp_word);
- dbg("%s: slot_cap %x\n", __FUNCTION__, slot_cap);
intr_enable = intr_enable | PRSN_DETECT_ENABLE;
@@ -1445,7 +1404,6 @@ int pcie_init(struct controller * ctrl,
} else {
temp_word = (temp_word & ~HP_INTR_ENABLE) | HP_INTR_ENABLE;
}
- dbg("%s: temp_word %x\n", __FUNCTION__, temp_word);
/* Unmask Hot-plug Interrupt Enable for the interrupt notification mechanism case */
rc = hp_register_write_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
@@ -1453,14 +1411,11 @@ int pcie_init(struct controller * ctrl,
err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
goto abort_free_ctlr;
}
- dbg("%s : Unmask HPIE hp_register_write_word SLOT_CTRL with %x\n", __FUNCTION__, temp_word);
rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
if (rc) {
err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
goto abort_free_ctlr;
}
- dbg("%s: Unmask HPIE SLOT_STATUS offset %x reads slot_status %x\n", __FUNCTION__,
- SLOT_STATUS(ctrl->cap_base), slot_status);
temp_word = 0x1F; /* Clear all events */
rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
@@ -1468,8 +1423,16 @@ int pcie_init(struct controller * ctrl,
err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
goto abort_free_ctlr;
}
- dbg("%s: SLOT_STATUS offset %x writes slot_status %x\n", __FUNCTION__, SLOT_STATUS(ctrl->cap_base), temp_word);
+ if (pciehp_force) {
+ dbg("Bypassing BIOS check for pciehp use on %s\n",
+ pci_name(ctrl->pci_dev));
+ } else {
+ rc = pciehp_get_hp_hw_control_from_firmware(ctrl->pci_dev);
+ if (rc)
+ goto abort_free_ctlr;
+ }
+
/* Add this HPC instance into the HPC list */
spin_lock(&list_lock);
if (php_ctlr_list_head == 0) {
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-11 15:53:58 +0000