PCI: Simplify PCI device PM code

If the offset of PCI device's PM capability in its configuration space,
the mask of states that the device supports PME# from and the D1 and D2
support bits are cached in the corresponding struct pci_dev, the PCI
device PM code can be simplified quite a bit.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

2 files changed, 8 insertions, 1 deletions

diff --git a/include/linux/pci.h b/include/linux/pci.h
index 52ac06dcce98..68a29f0f2748 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -177,6 +177,13 @@ struct pci_dev {
         pci_power_t     current_state;  /* Current operating state. In ACPI-speak,
                                            this is D0-D3, D0 being fully functional,
                                            and D3 being off. */
+        int             pm_cap;         /* PM capability offset in the
+                                           configuration space */
+        unsigned int    pme_support:5;  /* Bitmask of states from which PME#
+                                           can be generated */
+        unsigned int    d1_support:1;   /* Low power state D1 is supported */
+        unsigned int    d2_support:1;   /* Low power state D2 is supported */
+        unsigned int    no_d1d2:1;      /* Only allow D0 and D3 */
 
 #ifdef CONFIG_PCIEASPM
         struct pcie_link_state  *link_state;    /* ASPM link state. */
@@ -201,7 +208,6 @@ struct pci_dev {
         unsigned int    is_added:1;
         unsigned int    is_busmaster:1; /* device is busmaster */
         unsigned int    no_msi:1;       /* device may not use msi */
-        unsigned int    no_d1d2:1;   /* only allow d0 or d3 */
         unsigned int    block_ucfg_access:1;    /* userspace config space access is blocked */
         unsigned int    broken_parity_status:1; /* Device generates false positive parity */
         unsigned int    msi_enabled:1;
diff --git a/include/linux/pci_regs.h b/include/linux/pci_regs.h
index c0c1223c9194..19958b929905 100644
--- a/include/linux/pci_regs.h
+++ b/include/linux/pci_regs.h
@@ -231,6 +231,7 @@
 #define  PCI_PM_CAP_PME_D2      0x2000  /* PME# from D2 */
 #define  PCI_PM_CAP_PME_D3      0x4000  /* PME# from D3 (hot) */
 #define  PCI_PM_CAP_PME_D3cold  0x8000  /* PME# from D3 (cold) */
+#define  PCI_PM_CAP_PME_SHIFT   11      /* Start of the PME Mask in PMC */
 #define PCI_PM_CTRL             4       /* PM control and status register */
 #define  PCI_PM_CTRL_STATE_MASK 0x0003  /* Current power state (D0 to D3) */
 #define  PCI_PM_CTRL_NO_SOFT_RESET      0x0004  /* No reset for D3hot->D0 */