diff options
author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2010-11-06 11:18:58 +0100 |
---|---|---|
committer | Chris Wilson <chris@chris-wilson.co.uk> | 2010-11-23 20:14:47 +0000 |
commit | 4080775b60cc26044e7c4aba5e76e5041b0d7004 (patch) | |
tree | 46ee73a35bb1c99ff7e075e1c9b441faad98dc94 | |
parent | 7c2e6fdf452cddeff6a8ee5156edba39e53246fc (diff) | |
download | kernel_samsung_smdk4412-4080775b60cc26044e7c4aba5e76e5041b0d7004.zip kernel_samsung_smdk4412-4080775b60cc26044e7c4aba5e76e5041b0d7004.tar.gz kernel_samsung_smdk4412-4080775b60cc26044e7c4aba5e76e5041b0d7004.tar.bz2 |
intel-gtt: export api for drm/i915
Just some minor shuffling to get rid of any agp traces in the
exported functions.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
-rw-r--r-- | drivers/char/agp/intel-gtt.c | 120 | ||||
-rw-r--r-- | include/drm/intel-gtt.h | 12 |
2 files changed, 80 insertions, 52 deletions
diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c index 1603e4f..5a2b736 100644 --- a/drivers/char/agp/intel-gtt.c +++ b/drivers/char/agp/intel-gtt.c @@ -87,41 +87,29 @@ static struct _intel_private { #define IS_IRONLAKE intel_private.driver->is_ironlake #define HAS_PGTBL_EN intel_private.driver->has_pgtbl_enable -static void intel_agp_free_sglist(struct agp_memory *mem) -{ - struct sg_table st; - - st.sgl = mem->sg_list; - st.orig_nents = st.nents = mem->page_count; - - sg_free_table(&st); - - mem->sg_list = NULL; - mem->num_sg = 0; -} - -static int intel_agp_map_memory(struct agp_memory *mem) +int intel_gtt_map_memory(struct page **pages, unsigned int num_entries, + struct scatterlist **sg_list, int *num_sg) { struct sg_table st; struct scatterlist *sg; int i; - if (mem->sg_list) + if (*sg_list) return 0; /* already mapped (for e.g. resume */ - DBG("try mapping %lu pages\n", (unsigned long)mem->page_count); + DBG("try mapping %lu pages\n", (unsigned long)num_entries); - if (sg_alloc_table(&st, mem->page_count, GFP_KERNEL)) + if (sg_alloc_table(&st, num_entries, GFP_KERNEL)) goto err; - mem->sg_list = sg = st.sgl; + *sg_list = sg = st.sgl; - for (i = 0 ; i < mem->page_count; i++, sg = sg_next(sg)) - sg_set_page(sg, mem->pages[i], PAGE_SIZE, 0); + for (i = 0 ; i < num_entries; i++, sg = sg_next(sg)) + sg_set_page(sg, pages[i], PAGE_SIZE, 0); - mem->num_sg = pci_map_sg(intel_private.pcidev, mem->sg_list, - mem->page_count, PCI_DMA_BIDIRECTIONAL); - if (unlikely(!mem->num_sg)) + *num_sg = pci_map_sg(intel_private.pcidev, *sg_list, + num_entries, PCI_DMA_BIDIRECTIONAL); + if (unlikely(!*num_sg)) goto err; return 0; @@ -130,15 +118,22 @@ err: sg_free_table(&st); return -ENOMEM; } +EXPORT_SYMBOL(intel_gtt_map_memory); -static void intel_agp_unmap_memory(struct agp_memory *mem) +void intel_gtt_unmap_memory(struct scatterlist *sg_list, int num_sg) { + struct sg_table st; DBG("try unmapping %lu pages\n", (unsigned long)mem->page_count); - pci_unmap_sg(intel_private.pcidev, mem->sg_list, - mem->page_count, PCI_DMA_BIDIRECTIONAL); - intel_agp_free_sglist(mem); + pci_unmap_sg(intel_private.pcidev, sg_list, + num_sg, PCI_DMA_BIDIRECTIONAL); + + st.sgl = sg_list; + st.orig_nents = st.nents = num_sg; + + sg_free_table(&st); } +EXPORT_SYMBOL(intel_gtt_unmap_memory); static void intel_fake_agp_enable(struct agp_bridge_data *bridge, u32 mode) { @@ -307,7 +302,7 @@ static int intel_gtt_setup_scratch_page(void) get_page(page); set_pages_uc(page, 1); - if (USE_PCI_DMA_API && INTEL_GTT_GEN > 2) { + if (intel_private.base.needs_dmar) { dma_addr = pci_map_page(intel_private.pcidev, page, 0, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); if (pci_dma_mapping_error(intel_private.pcidev, dma_addr)) @@ -699,6 +694,8 @@ static int intel_gtt_init(void) return ret; } + intel_private.base.needs_dmar = USE_PCI_DMA_API && INTEL_GTT_GEN > 2; + return 0; } @@ -892,10 +889,10 @@ static bool i830_check_flags(unsigned int flags) return false; } -static void intel_gtt_insert_sg_entries(struct scatterlist *sg_list, - unsigned int sg_len, - unsigned int pg_start, - unsigned int flags) +void intel_gtt_insert_sg_entries(struct scatterlist *sg_list, + unsigned int sg_len, + unsigned int pg_start, + unsigned int flags) { struct scatterlist *sg; unsigned int len, m; @@ -916,11 +913,25 @@ static void intel_gtt_insert_sg_entries(struct scatterlist *sg_list, } readl(intel_private.gtt+j-1); } +EXPORT_SYMBOL(intel_gtt_insert_sg_entries); + +void intel_gtt_insert_pages(unsigned int first_entry, unsigned int num_entries, + struct page **pages, unsigned int flags) +{ + int i, j; + + for (i = 0, j = first_entry; i < num_entries; i++, j++) { + dma_addr_t addr = page_to_phys(pages[i]); + intel_private.driver->write_entry(addr, + j, flags); + } + readl(intel_private.gtt+j-1); +} +EXPORT_SYMBOL(intel_gtt_insert_pages); static int intel_fake_agp_insert_entries(struct agp_memory *mem, off_t pg_start, int type) { - int i, j; int ret = -EINVAL; if (INTEL_GTT_GEN == 1 && type == AGP_DCACHE_MEMORY) @@ -941,21 +952,17 @@ static int intel_fake_agp_insert_entries(struct agp_memory *mem, if (!mem->is_flushed) global_cache_flush(); - if (USE_PCI_DMA_API && INTEL_GTT_GEN > 2) { - ret = intel_agp_map_memory(mem); + if (intel_private.base.needs_dmar) { + ret = intel_gtt_map_memory(mem->pages, mem->page_count, + &mem->sg_list, &mem->num_sg); if (ret != 0) return ret; intel_gtt_insert_sg_entries(mem->sg_list, mem->num_sg, pg_start, type); - } else { - for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { - dma_addr_t addr = page_to_phys(mem->pages[i]); - intel_private.driver->write_entry(addr, - j, type); - } - readl(intel_private.gtt+j-1); - } + } else + intel_gtt_insert_pages(pg_start, mem->page_count, mem->pages, + type); out: ret = 0; @@ -964,22 +971,31 @@ out_err: return ret; } +void intel_gtt_clear_range(unsigned int first_entry, unsigned int num_entries) +{ + unsigned int i; + + for (i = first_entry; i < (first_entry + num_entries); i++) { + intel_private.driver->write_entry(intel_private.scratch_page_dma, + i, 0); + } + readl(intel_private.gtt+i-1); +} +EXPORT_SYMBOL(intel_gtt_clear_range); + static int intel_fake_agp_remove_entries(struct agp_memory *mem, off_t pg_start, int type) { - int i; - if (mem->page_count == 0) return 0; - if (USE_PCI_DMA_API && INTEL_GTT_GEN > 2) - intel_agp_unmap_memory(mem); - - for (i = pg_start; i < (mem->page_count + pg_start); i++) { - intel_private.driver->write_entry(intel_private.scratch_page_dma, - i, 0); + if (intel_private.base.needs_dmar) { + intel_gtt_unmap_memory(mem->sg_list, mem->num_sg); + mem->sg_list = NULL; + mem->num_sg = 0; } - readl(intel_private.gtt+i-1); + + intel_gtt_clear_range(pg_start, mem->page_count); return 0; } diff --git a/include/drm/intel-gtt.h b/include/drm/intel-gtt.h index c35817a..9e343c0 100644 --- a/include/drm/intel-gtt.h +++ b/include/drm/intel-gtt.h @@ -11,9 +11,21 @@ const struct intel_gtt { /* Part of the gtt that is mappable by the cpu, for those chips where * this is not the full gtt. */ unsigned int gtt_mappable_entries; + /* Whether i915 needs to use the dmar apis or not. */ + unsigned int needs_dmar : 1; } *intel_gtt_get(void); void intel_gtt_chipset_flush(void); +void intel_gtt_unmap_memory(struct scatterlist *sg_list, int num_sg); +void intel_gtt_clear_range(unsigned int first_entry, unsigned int num_entries); +int intel_gtt_map_memory(struct page **pages, unsigned int num_entries, + struct scatterlist **sg_list, int *num_sg); +void intel_gtt_insert_sg_entries(struct scatterlist *sg_list, + unsigned int sg_len, + unsigned int pg_start, + unsigned int flags); +void intel_gtt_insert_pages(unsigned int first_entry, unsigned int num_entries, + struct page **pages, unsigned int flags); /* Special gtt memory types */ #define AGP_DCACHE_MEMORY 1 |