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authorKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>2009-11-11 14:33:30 +0900
committerJesse Barnes <jbarnes@virtuousgeek.org>2009-11-24 15:25:14 -0800
commitdb9538a7495e33f3571c0e791c7678bc0c6ef50f (patch)
tree690c5977a83e5c7f0423870dd208784afcd4b159 /drivers/pci/pcie
parentdba90dfe48e2e00e79a15c95940730b6926ee176 (diff)
downloadop-kernel-dev-db9538a7495e33f3571c0e791c7678bc0c6ef50f.zip
op-kernel-dev-db9538a7495e33f3571c0e791c7678bc0c6ef50f.tar.gz
PCIe ASPM: use pci_pcie_cap()
Use pci_pcie_cap() instead of pci_find_capability() to get PCIe capability offset in PCIe ASPM driver. This avoids unnecessary search in PCI configuration space. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/pcie')
-rw-r--r--drivers/pci/pcie/aspm.c20
1 files changed, 10 insertions, 10 deletions
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index 745402e..17baffc 100644
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -122,7 +122,7 @@ static void pcie_set_clkpm_nocheck(struct pcie_link_state *link, int enable)
struct pci_bus *linkbus = link->pdev->subordinate;
list_for_each_entry(child, &linkbus->devices, bus_list) {
- pos = pci_find_capability(child, PCI_CAP_ID_EXP);
+ pos = pci_pcie_cap(child);
if (!pos)
return;
pci_read_config_word(child, pos + PCI_EXP_LNKCTL, &reg16);
@@ -156,7 +156,7 @@ static void pcie_clkpm_cap_init(struct pcie_link_state *link, int blacklist)
/* All functions should have the same cap and state, take the worst */
list_for_each_entry(child, &linkbus->devices, bus_list) {
- pos = pci_find_capability(child, PCI_CAP_ID_EXP);
+ pos = pci_pcie_cap(child);
if (!pos)
return;
pci_read_config_dword(child, pos + PCI_EXP_LNKCAP, &reg32);
@@ -194,20 +194,20 @@ static void pcie_aspm_configure_common_clock(struct pcie_link_state *link)
BUG_ON(!child->is_pcie);
/* Check downstream component if bit Slot Clock Configuration is 1 */
- cpos = pci_find_capability(child, PCI_CAP_ID_EXP);
+ cpos = pci_pcie_cap(child);
pci_read_config_word(child, cpos + PCI_EXP_LNKSTA, &reg16);
if (!(reg16 & PCI_EXP_LNKSTA_SLC))
same_clock = 0;
/* Check upstream component if bit Slot Clock Configuration is 1 */
- ppos = pci_find_capability(parent, PCI_CAP_ID_EXP);
+ ppos = pci_pcie_cap(parent);
pci_read_config_word(parent, ppos + PCI_EXP_LNKSTA, &reg16);
if (!(reg16 & PCI_EXP_LNKSTA_SLC))
same_clock = 0;
/* Configure downstream component, all functions */
list_for_each_entry(child, &linkbus->devices, bus_list) {
- cpos = pci_find_capability(child, PCI_CAP_ID_EXP);
+ cpos = pci_pcie_cap(child);
pci_read_config_word(child, cpos + PCI_EXP_LNKCTL, &reg16);
child_reg[PCI_FUNC(child->devfn)] = reg16;
if (same_clock)
@@ -247,7 +247,7 @@ static void pcie_aspm_configure_common_clock(struct pcie_link_state *link)
dev_printk(KERN_ERR, &parent->dev,
"ASPM: Could not configure common clock\n");
list_for_each_entry(child, &linkbus->devices, bus_list) {
- cpos = pci_find_capability(child, PCI_CAP_ID_EXP);
+ cpos = pci_pcie_cap(child);
pci_write_config_word(child, cpos + PCI_EXP_LNKCTL,
child_reg[PCI_FUNC(child->devfn)]);
}
@@ -300,7 +300,7 @@ static void pcie_get_aspm_reg(struct pci_dev *pdev,
u16 reg16;
u32 reg32;
- pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
+ pos = pci_pcie_cap(pdev);
pci_read_config_dword(pdev, pos + PCI_EXP_LNKCAP, &reg32);
info->support = (reg32 & PCI_EXP_LNKCAP_ASPMS) >> 10;
info->latency_encoding_l0s = (reg32 & PCI_EXP_LNKCAP_L0SEL) >> 12;
@@ -420,7 +420,7 @@ static void pcie_aspm_cap_init(struct pcie_link_state *link, int blacklist)
child->pcie_type != PCI_EXP_TYPE_LEG_END)
continue;
- pos = pci_find_capability(child, PCI_CAP_ID_EXP);
+ pos = pci_pcie_cap(child);
pci_read_config_dword(child, pos + PCI_EXP_DEVCAP, &reg32);
/* Calculate endpoint L0s acceptable latency */
encoding = (reg32 & PCI_EXP_DEVCAP_L0S) >> 6;
@@ -436,7 +436,7 @@ static void pcie_aspm_cap_init(struct pcie_link_state *link, int blacklist)
static void pcie_config_aspm_dev(struct pci_dev *pdev, u32 val)
{
u16 reg16;
- int pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
+ int pos = pci_pcie_cap(pdev);
pci_read_config_word(pdev, pos + PCI_EXP_LNKCTL, &reg16);
reg16 &= ~0x3;
@@ -503,7 +503,7 @@ static int pcie_aspm_sanity_check(struct pci_dev *pdev)
* very strange. Disable ASPM for the whole slot
*/
list_for_each_entry(child, &pdev->subordinate->devices, bus_list) {
- pos = pci_find_capability(child, PCI_CAP_ID_EXP);
+ pos = pci_pcie_cap(child);
if (!pos)
return -EINVAL;
/*
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