From 42f142371e48fbc44956d57b4e506bb6ce673cd7 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Tue, 23 May 2006 02:07:22 -0700 Subject: [PATCH] [SPARC64]: Respect gfp_t argument to dma_alloc_coherent(). Using asm-generic/dma-mapping.h does not work because pushing the call down to pci_alloc_coherent() causes the gfp_t argument of dma_alloc_coherent() to be ignored. Fix this by implementing things directly, and adding a gfp_t argument we can use in the internal call down to the PCI DMA implementation of pci_alloc_coherent(). This fixes massive memory corruption when using the sound driver layer, which passes things like __GFP_COMP down into these routines and (correctly) expects that to work. Signed-off-by: David S. Miller --- arch/sparc64/kernel/pci_iommu.c | 4 +- arch/sparc64/kernel/pci_sun4v.c | 4 +- include/asm-sparc64/dma-mapping.h | 141 +++++++++++++++++++++++++++++- include/asm-sparc64/pci.h | 4 +- 4 files changed, 146 insertions(+), 7 deletions(-) diff --git a/arch/sparc64/kernel/pci_iommu.c b/arch/sparc64/kernel/pci_iommu.c index 8efbc13976..82e5455134 100644 --- a/arch/sparc64/kernel/pci_iommu.c +++ b/arch/sparc64/kernel/pci_iommu.c @@ -218,7 +218,7 @@ static inline void iommu_free_ctx(struct pci_iommu *iommu, int ctx) * DMA for PCI device PDEV. Return non-NULL cpu-side address if * successful and set *DMA_ADDRP to the PCI side dma address. */ -static void *pci_4u_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp) +static void *pci_4u_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp, gfp_t gfp) { struct pcidev_cookie *pcp; struct pci_iommu *iommu; @@ -232,7 +232,7 @@ static void *pci_4u_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr if (order >= 10) return NULL; - first_page = __get_free_pages(GFP_ATOMIC, order); + first_page = __get_free_pages(gfp, order); if (first_page == 0UL) return NULL; memset((char *)first_page, 0, PAGE_SIZE << order); diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c index 9e94db2573..2b7a1f316a 100644 --- a/arch/sparc64/kernel/pci_sun4v.c +++ b/arch/sparc64/kernel/pci_sun4v.c @@ -154,7 +154,7 @@ static void pci_arena_free(struct pci_iommu_arena *arena, unsigned long base, un __clear_bit(i, arena->map); } -static void *pci_4v_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp) +static void *pci_4v_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp, gfp_t gfp) { struct pcidev_cookie *pcp; struct pci_iommu *iommu; @@ -169,7 +169,7 @@ static void *pci_4v_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr npages = size >> IO_PAGE_SHIFT; - first_page = __get_free_pages(GFP_ATOMIC, order); + first_page = __get_free_pages(gfp, order); if (unlikely(first_page == 0UL)) return NULL; diff --git a/include/asm-sparc64/dma-mapping.h b/include/asm-sparc64/dma-mapping.h index c7d5804ba7..a8d39f23d4 100644 --- a/include/asm-sparc64/dma-mapping.h +++ b/include/asm-sparc64/dma-mapping.h @@ -4,7 +4,146 @@ #include #ifdef CONFIG_PCI -#include + +/* we implement the API below in terms of the existing PCI one, + * so include it */ +#include +/* need struct page definitions */ +#include + +static inline int +dma_supported(struct device *dev, u64 mask) +{ + BUG_ON(dev->bus != &pci_bus_type); + + return pci_dma_supported(to_pci_dev(dev), mask); +} + +static inline int +dma_set_mask(struct device *dev, u64 dma_mask) +{ + BUG_ON(dev->bus != &pci_bus_type); + + return pci_set_dma_mask(to_pci_dev(dev), dma_mask); +} + +static inline void * +dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, + gfp_t flag) +{ + BUG_ON(dev->bus != &pci_bus_type); + + return pci_iommu_ops->alloc_consistent(to_pci_dev(dev), size, dma_handle, flag); +} + +static inline void +dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, + dma_addr_t dma_handle) +{ + BUG_ON(dev->bus != &pci_bus_type); + + pci_free_consistent(to_pci_dev(dev), size, cpu_addr, dma_handle); +} + +static inline dma_addr_t +dma_map_single(struct device *dev, void *cpu_addr, size_t size, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + return pci_map_single(to_pci_dev(dev), cpu_addr, size, (int)direction); +} + +static inline void +dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + pci_unmap_single(to_pci_dev(dev), dma_addr, size, (int)direction); +} + +static inline dma_addr_t +dma_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + return pci_map_page(to_pci_dev(dev), page, offset, size, (int)direction); +} + +static inline void +dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + pci_unmap_page(to_pci_dev(dev), dma_address, size, (int)direction); +} + +static inline int +dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + return pci_map_sg(to_pci_dev(dev), sg, nents, (int)direction); +} + +static inline void +dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + pci_unmap_sg(to_pci_dev(dev), sg, nhwentries, (int)direction); +} + +static inline void +dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + pci_dma_sync_single_for_cpu(to_pci_dev(dev), dma_handle, + size, (int)direction); +} + +static inline void +dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + pci_dma_sync_single_for_device(to_pci_dev(dev), dma_handle, + size, (int)direction); +} + +static inline void +dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + pci_dma_sync_sg_for_cpu(to_pci_dev(dev), sg, nelems, (int)direction); +} + +static inline void +dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + pci_dma_sync_sg_for_device(to_pci_dev(dev), sg, nelems, (int)direction); +} + +static inline int +dma_mapping_error(dma_addr_t dma_addr) +{ + return pci_dma_mapping_error(dma_addr); +} + #else struct device; diff --git a/include/asm-sparc64/pci.h b/include/asm-sparc64/pci.h index 7c5a589ea4..e1ea67bc32 100644 --- a/include/asm-sparc64/pci.h +++ b/include/asm-sparc64/pci.h @@ -42,7 +42,7 @@ static inline void pcibios_penalize_isa_irq(int irq, int active) struct pci_dev; struct pci_iommu_ops { - void *(*alloc_consistent)(struct pci_dev *, size_t, dma_addr_t *); + void *(*alloc_consistent)(struct pci_dev *, size_t, dma_addr_t *, gfp_t); void (*free_consistent)(struct pci_dev *, size_t, void *, dma_addr_t); dma_addr_t (*map_single)(struct pci_dev *, void *, size_t, int); void (*unmap_single)(struct pci_dev *, dma_addr_t, size_t, int); @@ -59,7 +59,7 @@ extern struct pci_iommu_ops *pci_iommu_ops; */ static inline void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size, dma_addr_t *dma_handle) { - return pci_iommu_ops->alloc_consistent(hwdev, size, dma_handle); + return pci_iommu_ops->alloc_consistent(hwdev, size, dma_handle, GFP_ATOMIC); } /* Free and unmap a consistent DMA buffer. -- 2.39.5