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yaml
---
r: 144243
b: refs/heads/master
c: 1b6b8ce
h: refs/heads/master
i:
  144241: 82c9f1d
  144239: ea3e5f5
v: v3
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Yu Zhao authored and Jesse Barnes committed Apr 22, 2009
1 parent 904a5c8 commit 384fbe1
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Showing 3 changed files with 58 additions and 15 deletions.
2 changes: 1 addition & 1 deletion [refs]
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Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: b10ceb5530df7ee6e81f92910589a34dd3e5690b
refs/heads/master: 1b6b8ce2ac372ea1f2065b89228ede105eb68dc5
70 changes: 56 additions & 14 deletions trunk/drivers/pci/pci.c
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Original file line number Diff line number Diff line change
Expand Up @@ -681,11 +681,34 @@ EXPORT_SYMBOL(pci_choose_state);

#define PCI_EXP_SAVE_REGS 7

#define pcie_cap_has_devctl(type, flags) 1
#define pcie_cap_has_lnkctl(type, flags) \
((flags & PCI_EXP_FLAGS_VERS) > 1 || \
(type == PCI_EXP_TYPE_ROOT_PORT || \
type == PCI_EXP_TYPE_ENDPOINT || \
type == PCI_EXP_TYPE_LEG_END))
#define pcie_cap_has_sltctl(type, flags) \
((flags & PCI_EXP_FLAGS_VERS) > 1 || \
((type == PCI_EXP_TYPE_ROOT_PORT) || \
(type == PCI_EXP_TYPE_DOWNSTREAM && \
(flags & PCI_EXP_FLAGS_SLOT))))
#define pcie_cap_has_rtctl(type, flags) \
((flags & PCI_EXP_FLAGS_VERS) > 1 || \
(type == PCI_EXP_TYPE_ROOT_PORT || \
type == PCI_EXP_TYPE_RC_EC))
#define pcie_cap_has_devctl2(type, flags) \
((flags & PCI_EXP_FLAGS_VERS) > 1)
#define pcie_cap_has_lnkctl2(type, flags) \
((flags & PCI_EXP_FLAGS_VERS) > 1)
#define pcie_cap_has_sltctl2(type, flags) \
((flags & PCI_EXP_FLAGS_VERS) > 1)

static int pci_save_pcie_state(struct pci_dev *dev)
{
int pos, i = 0;
struct pci_cap_saved_state *save_state;
u16 *cap;
u16 flags;

pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
if (pos <= 0)
Expand All @@ -698,13 +721,22 @@ static int pci_save_pcie_state(struct pci_dev *dev)
}
cap = (u16 *)&save_state->data[0];

pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &cap[i++]);
pci_read_config_word(dev, pos + PCI_EXP_LNKCTL, &cap[i++]);
pci_read_config_word(dev, pos + PCI_EXP_SLTCTL, &cap[i++]);
pci_read_config_word(dev, pos + PCI_EXP_RTCTL, &cap[i++]);
pci_read_config_word(dev, pos + PCI_EXP_DEVCTL2, &cap[i++]);
pci_read_config_word(dev, pos + PCI_EXP_LNKCTL2, &cap[i++]);
pci_read_config_word(dev, pos + PCI_EXP_SLTCTL2, &cap[i++]);
pci_read_config_word(dev, pos + PCI_EXP_FLAGS, &flags);

if (pcie_cap_has_devctl(dev->pcie_type, flags))
pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &cap[i++]);
if (pcie_cap_has_lnkctl(dev->pcie_type, flags))
pci_read_config_word(dev, pos + PCI_EXP_LNKCTL, &cap[i++]);
if (pcie_cap_has_sltctl(dev->pcie_type, flags))
pci_read_config_word(dev, pos + PCI_EXP_SLTCTL, &cap[i++]);
if (pcie_cap_has_rtctl(dev->pcie_type, flags))
pci_read_config_word(dev, pos + PCI_EXP_RTCTL, &cap[i++]);
if (pcie_cap_has_devctl2(dev->pcie_type, flags))
pci_read_config_word(dev, pos + PCI_EXP_DEVCTL2, &cap[i++]);
if (pcie_cap_has_lnkctl2(dev->pcie_type, flags))
pci_read_config_word(dev, pos + PCI_EXP_LNKCTL2, &cap[i++]);
if (pcie_cap_has_sltctl2(dev->pcie_type, flags))
pci_read_config_word(dev, pos + PCI_EXP_SLTCTL2, &cap[i++]);

return 0;
}
Expand All @@ -714,20 +746,30 @@ static void pci_restore_pcie_state(struct pci_dev *dev)
int i = 0, pos;
struct pci_cap_saved_state *save_state;
u16 *cap;
u16 flags;

save_state = pci_find_saved_cap(dev, PCI_CAP_ID_EXP);
pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
if (!save_state || pos <= 0)
return;
cap = (u16 *)&save_state->data[0];

pci_write_config_word(dev, pos + PCI_EXP_DEVCTL, cap[i++]);
pci_write_config_word(dev, pos + PCI_EXP_LNKCTL, cap[i++]);
pci_write_config_word(dev, pos + PCI_EXP_SLTCTL, cap[i++]);
pci_write_config_word(dev, pos + PCI_EXP_RTCTL, cap[i++]);
pci_write_config_word(dev, pos + PCI_EXP_DEVCTL2, cap[i++]);
pci_write_config_word(dev, pos + PCI_EXP_LNKCTL2, cap[i++]);
pci_write_config_word(dev, pos + PCI_EXP_SLTCTL2, cap[i++]);
pci_read_config_word(dev, pos + PCI_EXP_FLAGS, &flags);

if (pcie_cap_has_devctl(dev->pcie_type, flags))
pci_write_config_word(dev, pos + PCI_EXP_DEVCTL, cap[i++]);
if (pcie_cap_has_lnkctl(dev->pcie_type, flags))
pci_write_config_word(dev, pos + PCI_EXP_LNKCTL, cap[i++]);
if (pcie_cap_has_sltctl(dev->pcie_type, flags))
pci_write_config_word(dev, pos + PCI_EXP_SLTCTL, cap[i++]);
if (pcie_cap_has_rtctl(dev->pcie_type, flags))
pci_write_config_word(dev, pos + PCI_EXP_RTCTL, cap[i++]);
if (pcie_cap_has_devctl2(dev->pcie_type, flags))
pci_write_config_word(dev, pos + PCI_EXP_DEVCTL2, cap[i++]);
if (pcie_cap_has_lnkctl2(dev->pcie_type, flags))
pci_write_config_word(dev, pos + PCI_EXP_LNKCTL2, cap[i++]);
if (pcie_cap_has_sltctl2(dev->pcie_type, flags))
pci_write_config_word(dev, pos + PCI_EXP_SLTCTL2, cap[i++]);
}


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1 change: 1 addition & 0 deletions trunk/include/linux/pci_regs.h
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Original file line number Diff line number Diff line change
Expand Up @@ -376,6 +376,7 @@
#define PCI_EXP_TYPE_DOWNSTREAM 0x6 /* Downstream Port */
#define PCI_EXP_TYPE_PCI_BRIDGE 0x7 /* PCI/PCI-X Bridge */
#define PCI_EXP_TYPE_RC_END 0x9 /* Root Complex Integrated Endpoint */
#define PCI_EXP_TYPE_RC_EC 0x10 /* Root Complex Event Collector */
#define PCI_EXP_FLAGS_SLOT 0x0100 /* Slot implemented */
#define PCI_EXP_FLAGS_IRQ 0x3e00 /* Interrupt message number */
#define PCI_EXP_DEVCAP 4 /* Device capabilities */
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