From a34a9b9682a5a9de53386ed0872c7d38ca9d6b38 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 19 Jun 2018 09:04:53 +0200 Subject: [PATCH] parisc: merge pcx_dma_ops and pcxl_dma_ops The only difference is that pcxl supports dma coherent allocations, while pcx only supports non-consistent allocations and otherwise fails. But dma_alloc* is not in the fast path, and merging these two allows an easy migration path to the generic dma-noncoherent implementation, so do it. Signed-off-by: Christoph Hellwig Signed-off-by: Helge Deller --- arch/parisc/include/asm/dma-mapping.h | 3 +- arch/parisc/kernel/pci-dma.c | 80 ++++++++++++--------------- arch/parisc/kernel/setup.c | 8 +-- arch/parisc/mm/init.c | 11 +--- 4 files changed, 43 insertions(+), 59 deletions(-) diff --git a/arch/parisc/include/asm/dma-mapping.h b/arch/parisc/include/asm/dma-mapping.h index 01e1fc057c83..eeec8dd18e74 100644 --- a/arch/parisc/include/asm/dma-mapping.h +++ b/arch/parisc/include/asm/dma-mapping.h @@ -22,8 +22,7 @@ */ #ifdef CONFIG_PA11 -extern const struct dma_map_ops pcxl_dma_ops; -extern const struct dma_map_ops pcx_dma_ops; +extern const struct dma_map_ops pa11_dma_ops; #endif extern const struct dma_map_ops *hppa_dma_ops; diff --git a/arch/parisc/kernel/pci-dma.c b/arch/parisc/kernel/pci-dma.c index 6df07ce4f3c2..d34cd6d34717 100644 --- a/arch/parisc/kernel/pci-dma.c +++ b/arch/parisc/kernel/pci-dma.c @@ -395,7 +395,7 @@ pcxl_dma_init(void) __initcall(pcxl_dma_init); -static void *pa11_dma_alloc(struct device *dev, size_t size, +static void *pcxl_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs) { unsigned long vaddr; @@ -422,16 +422,44 @@ static void *pa11_dma_alloc(struct device *dev, size_t size, return (void *)vaddr; } +static void *pcx_dma_alloc(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs) +{ + void *addr; + + if ((attrs & DMA_ATTR_NON_CONSISTENT) == 0) + return NULL; + + addr = (void *)__get_free_pages(flag, get_order(size)); + if (addr) + *dma_handle = (dma_addr_t)virt_to_phys(addr); + + return addr; +} + +static void *pa11_dma_alloc(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs) +{ + + if (boot_cpu_data.cpu_type == pcxl2 || boot_cpu_data.cpu_type == pcxl) + return pcxl_dma_alloc(dev, size, dma_handle, gfp, attrs); + else + return pcx_dma_alloc(dev, size, dma_handle, gfp, attrs); +} + static void pa11_dma_free(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle, unsigned long attrs) { - int order; + int order = get_order(size); - order = get_order(size); - size = 1 << (order + PAGE_SHIFT); - unmap_uncached_pages((unsigned long)vaddr, size); - pcxl_free_range((unsigned long)vaddr, size); - free_pages((unsigned long)__va(dma_handle), order); + if (boot_cpu_data.cpu_type == pcxl2 || boot_cpu_data.cpu_type == pcxl) { + size = 1 << (order + PAGE_SHIFT); + unmap_uncached_pages((unsigned long)vaddr, size); + pcxl_free_range((unsigned long)vaddr, size); + + vaddr = __va(dma_handle); + } + free_pages((unsigned long)vaddr, get_order(size)); } static dma_addr_t pa11_dma_map_page(struct device *dev, struct page *page, @@ -560,7 +588,7 @@ static void pa11_dma_cache_sync(struct device *dev, void *vaddr, size_t size, flush_kernel_dcache_range((unsigned long)vaddr, size); } -const struct dma_map_ops pcxl_dma_ops = { +const struct dma_map_ops pa11_dma_ops = { .alloc = pa11_dma_alloc, .free = pa11_dma_free, .map_page = pa11_dma_map_page, @@ -573,39 +601,3 @@ const struct dma_map_ops pcxl_dma_ops = { .sync_sg_for_device = pa11_dma_sync_sg_for_device, .cache_sync = pa11_dma_cache_sync, }; - -static void *pcx_dma_alloc(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs) -{ - void *addr; - - if ((attrs & DMA_ATTR_NON_CONSISTENT) == 0) - return NULL; - - addr = (void *)__get_free_pages(flag, get_order(size)); - if (addr) - *dma_handle = (dma_addr_t)virt_to_phys(addr); - - return addr; -} - -static void pcx_dma_free(struct device *dev, size_t size, void *vaddr, - dma_addr_t iova, unsigned long attrs) -{ - free_pages((unsigned long)vaddr, get_order(size)); - return; -} - -const struct dma_map_ops pcx_dma_ops = { - .alloc = pcx_dma_alloc, - .free = pcx_dma_free, - .map_page = pa11_dma_map_page, - .unmap_page = pa11_dma_unmap_page, - .map_sg = pa11_dma_map_sg, - .unmap_sg = pa11_dma_unmap_sg, - .sync_single_for_cpu = pa11_dma_sync_single_for_cpu, - .sync_single_for_device = pa11_dma_sync_single_for_device, - .sync_sg_for_cpu = pa11_dma_sync_sg_for_cpu, - .sync_sg_for_device = pa11_dma_sync_sg_for_device, - .cache_sync = pa11_dma_cache_sync, -}; diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c index 8d3a7b80ac42..5c8450a22255 100644 --- a/arch/parisc/kernel/setup.c +++ b/arch/parisc/kernel/setup.c @@ -97,14 +97,12 @@ void __init dma_ops_init(void) panic( "PA-RISC Linux currently only supports machines that conform to\n" "the PA-RISC 1.1 or 2.0 architecture specification.\n"); - case pcxs: - case pcxt: - hppa_dma_ops = &pcx_dma_ops; - break; case pcxl2: pa7300lc_init(); case pcxl: /* falls through */ - hppa_dma_ops = &pcxl_dma_ops; + case pcxs: + case pcxt: + hppa_dma_ops = &pa11_dma_ops; break; default: break; diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c index 2607d2d33405..74842d28a7a1 100644 --- a/arch/parisc/mm/init.c +++ b/arch/parisc/mm/init.c @@ -19,7 +19,6 @@ #include #include #include -#include /* for hppa_dma_ops and pcxl_dma_ops */ #include #include #include @@ -616,17 +615,13 @@ void __init mem_init(void) free_all_bootmem(); #ifdef CONFIG_PA11 - if (hppa_dma_ops == &pcxl_dma_ops) { + if (boot_cpu_data.cpu_type == pcxl2 || boot_cpu_data.cpu_type == pcxl) { pcxl_dma_start = (unsigned long)SET_MAP_OFFSET(MAP_START); parisc_vmalloc_start = SET_MAP_OFFSET(pcxl_dma_start + PCXL_DMA_MAP_SIZE); - } else { - pcxl_dma_start = 0; - parisc_vmalloc_start = SET_MAP_OFFSET(MAP_START); - } -#else - parisc_vmalloc_start = SET_MAP_OFFSET(MAP_START); + } else #endif + parisc_vmalloc_start = SET_MAP_OFFSET(MAP_START); mem_init_print_info(NULL); -- 2.39.5