The patch titled drm: fix for non-coherent DMA PowerPC has been removed from the -mm tree. Its filename was drm-fix-for-non-coherent-dma-powerpc.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: drm: fix for non-coherent DMA PowerPC From: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> This patch fixes bits of the DRM so to make the radeon DRI work on non-cache coherent PCI DMA variants of the PowerPC processors. It moves the few places that needs change to wrappers to that other architectures with similar issues can easily add their own changes to those wrappers, at least until we have more useful generic kernel API. Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> Cc: Dave Airlie <airlied@xxxxxxxx> Cc: "David S. Miller" <davem@xxxxxxxxxxxxx> Cc: "Luck, Tony" <tony.luck@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/char/drm/ati_pcigart.c | 6 ++++++ drivers/char/drm/drm_scatter.c | 11 ++++++++++- drivers/char/drm/drm_vm.c | 20 +++++++++++++++----- 3 files changed, 31 insertions(+), 6 deletions(-) diff -puN drivers/char/drm/ati_pcigart.c~drm-fix-for-non-coherent-dma-powerpc drivers/char/drm/ati_pcigart.c --- a/drivers/char/drm/ati_pcigart.c~drm-fix-for-non-coherent-dma-powerpc +++ a/drivers/char/drm/ati_pcigart.c @@ -183,6 +183,12 @@ int drm_ati_pcigart_init(struct drm_devi } } + if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) + dma_sync_single_for_device(&dev->pdev->dev, + bus_address, + max_pages * sizeof(u32), + PCI_DMA_TODEVICE); + ret = 1; #if defined(__i386__) || defined(__x86_64__) diff -puN drivers/char/drm/drm_scatter.c~drm-fix-for-non-coherent-dma-powerpc drivers/char/drm/drm_scatter.c --- a/drivers/char/drm/drm_scatter.c~drm-fix-for-non-coherent-dma-powerpc +++ a/drivers/char/drm/drm_scatter.c @@ -36,6 +36,15 @@ #define DEBUG_SCATTER 0 +static inline void *drm_vmalloc_dma(unsigned long size) +{ +#if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE) + return __vmalloc(size, GFP_KERNEL, PAGE_KERNEL | _PAGE_NO_CACHE); +#else + return vmalloc_32(size); +#endif +} + void drm_sg_cleanup(struct drm_sg_mem * entry) { struct page *page; @@ -104,7 +113,7 @@ int drm_sg_alloc(struct drm_device *dev, } memset((void *)entry->busaddr, 0, pages * sizeof(*entry->busaddr)); - entry->virtual = vmalloc_32(pages << PAGE_SHIFT); + entry->virtual = drm_vmalloc_dma(pages << PAGE_SHIFT); if (!entry->virtual) { drm_free(entry->busaddr, entry->pages * sizeof(*entry->busaddr), DRM_MEM_PAGES); diff -puN drivers/char/drm/drm_vm.c~drm-fix-for-non-coherent-dma-powerpc drivers/char/drm/drm_vm.c --- a/drivers/char/drm/drm_vm.c~drm-fix-for-non-coherent-dma-powerpc +++ a/drivers/char/drm/drm_vm.c @@ -58,13 +58,24 @@ static pgprot_t drm_io_prot(uint32_t map pgprot_val(tmp) |= _PAGE_NO_CACHE; if (map_type == _DRM_REGISTERS) pgprot_val(tmp) |= _PAGE_GUARDED; -#endif -#if defined(__ia64__) +#elif defined(__ia64__) if (efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start)) tmp = pgprot_writecombine(tmp); else tmp = pgprot_noncached(tmp); +#elif defined(__sparc__) + tmp = pgprot_noncached(tmp); +#endif + return tmp; +} + +static pgprot_t drm_dma_prot(uint32_t map_type, struct vm_area_struct *vma) +{ + pgprot_t tmp = vm_get_page_prot(vma->vm_flags); + +#if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE) + tmp |= _PAGE_NO_CACHE; #endif return tmp; } @@ -610,9 +621,6 @@ static int drm_mmap_locked(struct file * offset = dev->driver->get_reg_ofs(dev); vma->vm_flags |= VM_IO; /* not in core dump */ vma->vm_page_prot = drm_io_prot(map->type, vma); -#ifdef __sparc__ - vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); -#endif if (io_remap_pfn_range(vma, vma->vm_start, (map->offset + offset) >> PAGE_SHIFT, vma->vm_end - vma->vm_start, @@ -631,6 +639,7 @@ static int drm_mmap_locked(struct file * page_to_pfn(virt_to_page(map->handle)), vma->vm_end - vma->vm_start, vma->vm_page_prot)) return -EAGAIN; + vma->vm_page_prot = drm_dma_prot(map->type, vma); /* fall through to _DRM_SHM */ case _DRM_SHM: vma->vm_ops = &drm_vm_shm_ops; @@ -638,6 +647,7 @@ static int drm_mmap_locked(struct file * /* Don't let this area swap. Change when DRM_KERNEL advisory is supported. */ vma->vm_flags |= VM_RESERVED; + vma->vm_page_prot = drm_dma_prot(map->type, vma); break; case _DRM_SCATTER_GATHER: vma->vm_ops = &drm_vm_sg_ops; _ Patches currently in -mm which might be from benh@xxxxxxxxxxxxxxxxxxx are origin.patch git-powerpc.patch powerpc-replace-remaining-__function__-occurences.patch ppc-replace-remaining-__function__-occurences.patch drivers-block-viodasdc-use-field_sizeof.patch powerpc-remove-redundant-display-of-free-swap-space-in-show_mem.patch ppc-remove-redundant-display-of-free-swap-space-in-show_mem.patch lmb-add-lmb_alloc_nid.patch adt746x-logical-bitwise-confusion-in-set_max_duty_at_crit.patch git-ieee1394.patch iomap-fix-64-bits-resources-on-32-bits.patch fb-add-support-for-foreign-endianness.patch fb-add-support-for-foreign-endianness-add-support-for-choice-foreign-endianness.patch fb-add-support-for-foreign-endianness-force-it-on.patch powerpc-offb-add-support-for-foreign-endianness.patch radeonfb-use-pci-device-id-in-hex-for-name-string.patch radeonfb-fix-debug-option.patch radeonfb-drop-redundant-rtrace-macro.patch radeonfb-speed-up-the-i2c-buses.patch drivers-video-imsttfbc-add-missing-curly-brackets.patch video-replace-remaining-__function__-occurrences.patch asm-futexh-should-include-linux-uaccessh.patch basic-braille-screen-reader-support-ppc-fix.patch introduce-a-generic-__fls-implementation.patch implement-__fls-on-all-64-bit-archs.patch use-__fls-for-fls64-on-64-bit-archs.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html