powerpc/eeh: Add bdfn field to eeh_dev

Preparation for removing pci_dn from the powernv EEH code. The only
thing we really use pci_dn for is to get the bdfn of the device for
config space accesses, so adding that information to eeh_dev reduces
the need to carry around the pci_dn.

Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
[SB: Re-wrapped commit message, fixed whitespace damage.]
Signed-off-by: Sam Bobroff <sbobroff@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/e458eb69a1f591d8a120782f23a8506b15d3c654.1565930772.git.sbobroff@linux.ibm.com

diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h
index 1fc2b5e..294efea 100644 (file)
--- a/arch/powerpc/include/asm/eeh.h
+++ b/arch/powerpc/include/asm/eeh.h
@@ -121,6 +121,8 @@ static inline bool eeh_pe_passed(struct eeh_pe *pe)
 struct eeh_dev {
        int mode;                       /* EEH mode                     */
        int class_code;                 /* Class code of the device     */
+       int bdfn;                       /* bdfn of device (for cfg ops) */
+       struct pci_controller *controller;
        int pe_config_addr;             /* PE config address            */
        u32 config_space[16];           /* Saved PCI config space       */
        int pcix_cap;                   /* Saved PCIx capability        */

diff --git a/arch/powerpc/include/asm/ppc-pci.h b/arch/powerpc/include/asm/ppc-pci.h
index cec2d64..72860de 100644 (file)
--- a/arch/powerpc/include/asm/ppc-pci.h
+++ b/arch/powerpc/include/asm/ppc-pci.h
@@ -74,6 +74,8 @@ static inline const char *eeh_driver_name(struct pci_dev *pdev)
 
 #endif /* CONFIG_EEH */
 
+#define PCI_BUSNO(bdfn) ((bdfn >> 8) & 0xff)
+
 #else /* CONFIG_PCI */
 static inline void init_pci_config_tokens(void) { }
 #endif /* !CONFIG_PCI */

diff --git a/arch/powerpc/kernel/eeh_dev.c b/arch/powerpc/kernel/eeh_dev.c
index c4317c4..7370185 100644 (file)
--- a/arch/powerpc/kernel/eeh_dev.c
+++ b/arch/powerpc/kernel/eeh_dev.c
@@ -47,6 +47,8 @@ struct eeh_dev *eeh_dev_init(struct pci_dn *pdn)
        /* Associate EEH device with OF node */
        pdn->edev = edev;
        edev->pdn = pdn;
+       edev->bdfn = (pdn->busno << 8) | pdn->devfn;
+       edev->controller = pdn->phb;
 
        return edev;
 }