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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.c155
1 files changed, 51 insertions, 104 deletions
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 9ef4605c1ef..10040d58c8e 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -45,25 +45,25 @@ static atomic_t pciehp_num_controllers = ATOMIC_INIT(0);
static inline int pciehp_readw(struct controller *ctrl, int reg, u16 *value)
{
struct pci_dev *dev = ctrl->pcie->port;
- return pci_read_config_word(dev, ctrl->cap_base + reg, value);
+ return pci_read_config_word(dev, pci_pcie_cap(dev) + reg, value);
}
static inline int pciehp_readl(struct controller *ctrl, int reg, u32 *value)
{
struct pci_dev *dev = ctrl->pcie->port;
- return pci_read_config_dword(dev, ctrl->cap_base + reg, value);
+ return pci_read_config_dword(dev, pci_pcie_cap(dev) + reg, value);
}
static inline int pciehp_writew(struct controller *ctrl, int reg, u16 value)
{
struct pci_dev *dev = ctrl->pcie->port;
- return pci_write_config_word(dev, ctrl->cap_base + reg, value);
+ return pci_write_config_word(dev, pci_pcie_cap(dev) + reg, value);
}
static inline int pciehp_writel(struct controller *ctrl, int reg, u32 value)
{
struct pci_dev *dev = ctrl->pcie->port;
- return pci_write_config_dword(dev, ctrl->cap_base + reg, value);
+ return pci_write_config_dword(dev, pci_pcie_cap(dev) + reg, value);
}
/* Power Control Command */
@@ -318,8 +318,8 @@ int pciehp_get_attention_status(struct slot *slot, u8 *status)
return retval;
}
- ctrl_dbg(ctrl, "%s: SLOTCTRL %x, value read %x\n",
- __func__, ctrl->cap_base + PCI_EXP_SLTCTL, slot_ctrl);
+ ctrl_dbg(ctrl, "%s: SLOTCTRL %x, value read %x\n", __func__,
+ pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_ctrl);
atten_led_state = (slot_ctrl & PCI_EXP_SLTCTL_AIC) >> 6;
@@ -356,8 +356,8 @@ int pciehp_get_power_status(struct slot *slot, u8 *status)
ctrl_err(ctrl, "%s: Cannot read SLOTCTRL register\n", __func__);
return retval;
}
- ctrl_dbg(ctrl, "%s: SLOTCTRL %x value read %x\n",
- __func__, ctrl->cap_base + PCI_EXP_SLTCTL, slot_ctrl);
+ ctrl_dbg(ctrl, "%s: SLOTCTRL %x value read %x\n", __func__,
+ pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_ctrl);
pwr_state = (slot_ctrl & PCI_EXP_SLTCTL_PCC) >> 10;
@@ -427,27 +427,24 @@ int pciehp_set_attention_status(struct slot *slot, u8 value)
struct controller *ctrl = slot->ctrl;
u16 slot_cmd;
u16 cmd_mask;
- int rc;
cmd_mask = PCI_EXP_SLTCTL_AIC;
switch (value) {
- case 0 : /* turn off */
- slot_cmd = 0x00C0;
- break;
- case 1: /* turn on */
- slot_cmd = 0x0040;
- break;
- case 2: /* turn blink */
- slot_cmd = 0x0080;
- break;
- default:
- return -1;
+ case 0 : /* turn off */
+ slot_cmd = 0x00C0;
+ break;
+ case 1: /* turn on */
+ slot_cmd = 0x0040;
+ break;
+ case 2: /* turn blink */
+ slot_cmd = 0x0080;
+ break;
+ default:
+ return -EINVAL;
}
- rc = pcie_write_cmd(ctrl, slot_cmd, cmd_mask);
- ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n",
- __func__, ctrl->cap_base + PCI_EXP_SLTCTL, slot_cmd);
-
- return rc;
+ ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
+ pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_cmd);
+ return pcie_write_cmd(ctrl, slot_cmd, cmd_mask);
}
void pciehp_green_led_on(struct slot *slot)
@@ -459,8 +456,8 @@ void pciehp_green_led_on(struct slot *slot)
slot_cmd = 0x0100;
cmd_mask = PCI_EXP_SLTCTL_PIC;
pcie_write_cmd(ctrl, slot_cmd, cmd_mask);
- ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n",
- __func__, ctrl->cap_base + PCI_EXP_SLTCTL, slot_cmd);
+ ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
+ pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_cmd);
}
void pciehp_green_led_off(struct slot *slot)
@@ -472,8 +469,8 @@ void pciehp_green_led_off(struct slot *slot)
slot_cmd = 0x0300;
cmd_mask = PCI_EXP_SLTCTL_PIC;
pcie_write_cmd(ctrl, slot_cmd, cmd_mask);
- ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n",
- __func__, ctrl->cap_base + PCI_EXP_SLTCTL, slot_cmd);
+ ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
+ pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_cmd);
}
void pciehp_green_led_blink(struct slot *slot)
@@ -485,8 +482,8 @@ void pciehp_green_led_blink(struct slot *slot)
slot_cmd = 0x0200;
cmd_mask = PCI_EXP_SLTCTL_PIC;
pcie_write_cmd(ctrl, slot_cmd, cmd_mask);
- ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n",
- __func__, ctrl->cap_base + PCI_EXP_SLTCTL, slot_cmd);
+ ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
+ pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_cmd);
}
int pciehp_power_on_slot(struct slot * slot)
@@ -514,97 +511,38 @@ int pciehp_power_on_slot(struct slot * slot)
return retval;
}
}
+ ctrl->power_fault_detected = 0;
slot_cmd = POWER_ON;
cmd_mask = PCI_EXP_SLTCTL_PCC;
- if (!pciehp_poll_mode) {
- /* Enable power fault detection turned off at power off time */
- slot_cmd |= PCI_EXP_SLTCTL_PFDE;
- cmd_mask |= PCI_EXP_SLTCTL_PFDE;
- }
-
retval = pcie_write_cmd(ctrl, slot_cmd, cmd_mask);
if (retval) {
ctrl_err(ctrl, "Write %x command failed!\n", slot_cmd);
return retval;
}
- ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n",
- __func__, ctrl->cap_base + PCI_EXP_SLTCTL, slot_cmd);
+ ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
+ pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_cmd);
- ctrl->power_fault_detected = 0;
return retval;
}
-static inline int pcie_mask_bad_dllp(struct controller *ctrl)
-{
- struct pci_dev *dev = ctrl->pcie->port;
- int pos;
- u32 reg;
-
- pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
- if (!pos)
- return 0;
- pci_read_config_dword(dev, pos + PCI_ERR_COR_MASK, &reg);
- if (reg & PCI_ERR_COR_BAD_DLLP)
- return 0;
- reg |= PCI_ERR_COR_BAD_DLLP;
- pci_write_config_dword(dev, pos + PCI_ERR_COR_MASK, reg);
- return 1;
-}
-
-static inline void pcie_unmask_bad_dllp(struct controller *ctrl)
-{
- struct pci_dev *dev = ctrl->pcie->port;
- u32 reg;
- int pos;
-
- pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
- if (!pos)
- return;
- pci_read_config_dword(dev, pos + PCI_ERR_COR_MASK, &reg);
- if (!(reg & PCI_ERR_COR_BAD_DLLP))
- return;
- reg &= ~PCI_ERR_COR_BAD_DLLP;
- pci_write_config_dword(dev, pos + PCI_ERR_COR_MASK, reg);
-}
-
int pciehp_power_off_slot(struct slot * slot)
{
struct controller *ctrl = slot->ctrl;
u16 slot_cmd;
u16 cmd_mask;
- int retval = 0;
- int changed;
-
- /*
- * Set Bad DLLP Mask bit in Correctable Error Mask
- * Register. This is the workaround against Bad DLLP error
- * that sometimes happens during turning power off the slot
- * which conforms to PCI Express 1.0a spec.
- */
- changed = pcie_mask_bad_dllp(ctrl);
+ int retval;
slot_cmd = POWER_OFF;
cmd_mask = PCI_EXP_SLTCTL_PCC;
- if (!pciehp_poll_mode) {
- /* Disable power fault detection */
- slot_cmd &= ~PCI_EXP_SLTCTL_PFDE;
- cmd_mask |= PCI_EXP_SLTCTL_PFDE;
- }
-
retval = pcie_write_cmd(ctrl, slot_cmd, cmd_mask);
if (retval) {
ctrl_err(ctrl, "Write command failed!\n");
- retval = -1;
- goto out;
+ return retval;
}
- ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n",
- __func__, ctrl->cap_base + PCI_EXP_SLTCTL, slot_cmd);
- out:
- if (changed)
- pcie_unmask_bad_dllp(ctrl);
-
- return retval;
+ ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
+ pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_cmd);
+ return 0;
}
static irqreturn_t pcie_isr(int irq, void *dev_id)
@@ -840,11 +778,19 @@ int pcie_enable_notification(struct controller *ctrl)
{
u16 cmd, mask;
+ /*
+ * TBD: Power fault detected software notification support.
+ *
+ * Power fault detected software notification is not enabled
+ * now, because it caused power fault detected interrupt storm
+ * on some machines. On those machines, power fault detected
+ * bit in the slot status register was set again immediately
+ * when it is cleared in the interrupt service routine, and
+ * next power fault detected interrupt was notified again.
+ */
cmd = PCI_EXP_SLTCTL_PDCE;
if (ATTN_BUTTN(ctrl))
cmd |= PCI_EXP_SLTCTL_ABPE;
- if (POWER_CTRL(ctrl))
- cmd |= PCI_EXP_SLTCTL_PFDE;
if (MRL_SENS(ctrl))
cmd |= PCI_EXP_SLTCTL_MRLSCE;
if (!pciehp_poll_mode)
@@ -866,7 +812,8 @@ static void pcie_disable_notification(struct controller *ctrl)
u16 mask;
mask = (PCI_EXP_SLTCTL_PDCE | PCI_EXP_SLTCTL_ABPE |
PCI_EXP_SLTCTL_MRLSCE | PCI_EXP_SLTCTL_PFDE |
- PCI_EXP_SLTCTL_HPIE | PCI_EXP_SLTCTL_CCIE);
+ PCI_EXP_SLTCTL_HPIE | PCI_EXP_SLTCTL_CCIE |
+ PCI_EXP_SLTCTL_DLLSCE);
if (pcie_write_cmd(ctrl, 0, mask))
ctrl_warn(ctrl, "Cannot disable software notification\n");
}
@@ -934,7 +881,8 @@ static inline void dbg_ctrl(struct controller *ctrl)
pdev->subsystem_device);
ctrl_info(ctrl, " Subsystem Vendor ID : 0x%04x\n",
pdev->subsystem_vendor);
- ctrl_info(ctrl, " PCIe Cap offset : 0x%02x\n", ctrl->cap_base);
+ ctrl_info(ctrl, " PCIe Cap offset : 0x%02x\n",
+ pci_pcie_cap(pdev));
for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
if (!pci_resource_len(pdev, i))
continue;
@@ -978,8 +926,7 @@ struct controller *pcie_init(struct pcie_device *dev)
goto abort;
}
ctrl->pcie = dev;
- ctrl->cap_base = pci_find_capability(pdev, PCI_CAP_ID_EXP);
- if (!ctrl->cap_base) {
+ if (!pci_pcie_cap(pdev)) {
ctrl_err(ctrl, "Cannot find PCI Express capability\n");
goto abort_ctrl;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-21 19:08:21 +0000