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pciehp: use pci_pcie_cap()
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Use pci_pcie_cap() instead of pci_find_capability() to get PCIe capability
offset in pciehp driver. This avoids unnecessary search in PCI
configuration space. This patch also removes 'cap_base' field in
struct controller, that was used to hold PCIe capability offset by
pciehp itself.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Kenji Kaneshige authored and Jesse Barnes committed Nov 24, 2009
1 parent d3ccc40 commit 1518c17
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Showing 3 changed files with 25 additions and 25 deletions.
1 change: 0 additions & 1 deletion drivers/pci/hotplug/pciehp.h
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Original file line number Diff line number Diff line change
Expand Up @@ -91,7 +91,6 @@ struct controller {
struct slot *slot;
wait_queue_head_t queue; /* sleep & wake process */
u32 slot_cap;
u8 cap_base;
struct timer_list poll_timer;
unsigned int cmd_busy:1;
unsigned int no_cmd_complete:1;
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3 changes: 2 additions & 1 deletion drivers/pci/hotplug/pciehp_acpi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -87,7 +87,8 @@ static int __init dummy_probe(struct pcie_device *dev)
/* Note: pciehp_detect_mode != PCIEHP_DETECT_ACPI here */
if (pciehp_get_hp_hw_control_from_firmware(pdev))
return -ENODEV;
if (!(pos = pci_find_capability(pdev, PCI_CAP_ID_EXP)))
pos = pci_pcie_cap(pdev);
if (!pos)
return -ENODEV;
pci_read_config_dword(pdev, pos + PCI_EXP_SLTCAP, &slot_cap);
slot = kzalloc(sizeof(*slot), GFP_KERNEL);
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46 changes: 23 additions & 23 deletions drivers/pci/hotplug/pciehp_hpc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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 */
Expand Down Expand Up @@ -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;

Expand Down Expand Up @@ -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;

Expand Down Expand Up @@ -442,8 +442,8 @@ int pciehp_set_attention_status(struct slot *slot, u8 value)
default:
return -EINVAL;
}
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);
return pcie_write_cmd(ctrl, slot_cmd, cmd_mask);
}

Expand All @@ -456,8 +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)
Expand All @@ -469,8 +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)
Expand All @@ -482,8 +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)
Expand Down Expand Up @@ -525,8 +525,8 @@ int pciehp_power_on_slot(struct slot * slot)
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;
Expand All @@ -552,8 +552,8 @@ int pciehp_power_off_slot(struct slot * slot)
ctrl_err(ctrl, "Write command failed!\n");
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);
return 0;
}

Expand Down Expand Up @@ -885,7 +885,8 @@ 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;
Expand Down Expand Up @@ -929,8 +930,7 @@ 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;
}
Expand Down

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