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| author | Michael Ellerman <michael@ozlabs.org> | 2011-04-11 21:25:01 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-04-27 14:18:27 +1000 |
| commit | 21176fed25c3b0cb17c6c42d71b4e3d68b8f9dd4 (patch) | |
| tree | bd3b54affe6feda4966b688a218bb2bd0bc82611 | |
| parent | e297d9dd5cfafbeb2e7585bb444941848e030454 (diff) | |
| download | blackbird-op-linux-21176fed25c3b0cb17c6c42d71b4e3d68b8f9dd4.tar.gz blackbird-op-linux-21176fed25c3b0cb17c6c42d71b4e3d68b8f9dd4.zip | |
powerpc/pci: Split IO vs MMIO indirect access hooks
The goal is to avoid adding overhead to MMIO when only PIO is needed
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/include/asm/io.h | 16 | ||||
| -rw-r--r-- | arch/powerpc/platforms/Kconfig | 10 | ||||
| -rw-r--r-- | arch/powerpc/platforms/cell/Kconfig | 3 | ||||
| -rw-r--r-- | arch/powerpc/platforms/iseries/Kconfig | 3 |
4 files changed, 23 insertions, 9 deletions
diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h index 001f2f11c19b..2f365f5007a0 100644 --- a/arch/powerpc/include/asm/io.h +++ b/arch/powerpc/include/asm/io.h @@ -481,10 +481,16 @@ __do_out_asm(_rec_outl, "stwbrx") _memcpy_fromio(dst,PCI_FIX_ADDR(src),n) #endif /* !CONFIG_EEH */ -#ifdef CONFIG_PPC_INDIRECT_IO -#define DEF_PCI_HOOK(x) x +#ifdef CONFIG_PPC_INDIRECT_PIO +#define DEF_PCI_HOOK_pio(x) x +#else +#define DEF_PCI_HOOK_pio(x) NULL +#endif + +#ifdef CONFIG_PPC_INDIRECT_MMIO +#define DEF_PCI_HOOK_mem(x) x #else -#define DEF_PCI_HOOK(x) NULL +#define DEF_PCI_HOOK_mem(x) NULL #endif /* Structure containing all the hooks */ @@ -504,7 +510,7 @@ extern struct ppc_pci_io { #define DEF_PCI_AC_RET(name, ret, at, al, space, aa) \ static inline ret name at \ { \ - if (DEF_PCI_HOOK(ppc_pci_io.name) != NULL) \ + if (DEF_PCI_HOOK_##space(ppc_pci_io.name) != NULL) \ return ppc_pci_io.name al; \ return __do_##name al; \ } @@ -512,7 +518,7 @@ static inline ret name at \ #define DEF_PCI_AC_NORET(name, at, al, space, aa) \ static inline void name at \ { \ - if (DEF_PCI_HOOK(ppc_pci_io.name) != NULL) \ + if (DEF_PCI_HOOK_##space(ppc_pci_io.name) != NULL) \ ppc_pci_io.name al; \ else \ __do_##name al; \ diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig index 658ffc50493d..54db9fbab1dc 100644 --- a/arch/powerpc/platforms/Kconfig +++ b/arch/powerpc/platforms/Kconfig @@ -154,11 +154,17 @@ config PPC_P7_NAP config PPC_INDIRECT_IO bool select GENERIC_IOMAP - default n + +config PPC_INDIRECT_PIO + bool + select PPC_INDIRECT_IO + +config PPC_INDIRECT_MMIO + bool + select PPC_INDIRECT_IO config GENERIC_IOMAP bool - default n source "drivers/cpufreq/Kconfig" diff --git a/arch/powerpc/platforms/cell/Kconfig b/arch/powerpc/platforms/cell/Kconfig index 81239ebed83f..3c7f1de06cdf 100644 --- a/arch/powerpc/platforms/cell/Kconfig +++ b/arch/powerpc/platforms/cell/Kconfig @@ -6,7 +6,8 @@ config PPC_CELL_COMMON bool select PPC_CELL select PPC_DCR_MMIO - select PPC_INDIRECT_IO + select PPC_INDIRECT_PIO + select PPC_INDIRECT_MMIO select PPC_NATIVE select PPC_RTAS select IRQ_EDGE_EOI_HANDLER diff --git a/arch/powerpc/platforms/iseries/Kconfig b/arch/powerpc/platforms/iseries/Kconfig index e5bc9f75d474..ea1d3622b41c 100644 --- a/arch/powerpc/platforms/iseries/Kconfig +++ b/arch/powerpc/platforms/iseries/Kconfig @@ -1,7 +1,8 @@ config PPC_ISERIES bool "IBM Legacy iSeries" depends on PPC64 && PPC_BOOK3S - select PPC_INDIRECT_IO + select PPC_INDIRECT_PIO + select PPC_INDIRECT_MMIO select PPC_PCI_CHOICE if EXPERT menu "iSeries device drivers" |
