diff options
Diffstat (limited to 'kernel/drivers/gpu/drm/radeon/radeon_gart.c')
| -rw-r--r-- | kernel/drivers/gpu/drm/radeon/radeon_gart.c | 380 |
1 files changed, 380 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/radeon/radeon_gart.c b/kernel/drivers/gpu/drm/radeon/radeon_gart.c new file mode 100644 index 000000000..5450fa95a --- /dev/null +++ b/kernel/drivers/gpu/drm/radeon/radeon_gart.c @@ -0,0 +1,380 @@ +/* + * Copyright 2008 Advanced Micro Devices, Inc. + * Copyright 2008 Red Hat Inc. + * Copyright 2009 Jerome Glisse. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: Dave Airlie + * Alex Deucher + * Jerome Glisse + */ +#include <drm/drmP.h> +#include <drm/radeon_drm.h> +#include "radeon.h" + +/* + * GART + * The GART (Graphics Aperture Remapping Table) is an aperture + * in the GPU's address space. System pages can be mapped into + * the aperture and look like contiguous pages from the GPU's + * perspective. A page table maps the pages in the aperture + * to the actual backing pages in system memory. + * + * Radeon GPUs support both an internal GART, as described above, + * and AGP. AGP works similarly, but the GART table is configured + * and maintained by the northbridge rather than the driver. + * Radeon hw has a separate AGP aperture that is programmed to + * point to the AGP aperture provided by the northbridge and the + * requests are passed through to the northbridge aperture. + * Both AGP and internal GART can be used at the same time, however + * that is not currently supported by the driver. + * + * This file handles the common internal GART management. + */ + +/* + * Common GART table functions. + */ +/** + * radeon_gart_table_ram_alloc - allocate system ram for gart page table + * + * @rdev: radeon_device pointer + * + * Allocate system memory for GART page table + * (r1xx-r3xx, non-pcie r4xx, rs400). These asics require the + * gart table to be in system memory. + * Returns 0 for success, -ENOMEM for failure. + */ +int radeon_gart_table_ram_alloc(struct radeon_device *rdev) +{ + void *ptr; + + ptr = pci_alloc_consistent(rdev->pdev, rdev->gart.table_size, + &rdev->gart.table_addr); + if (ptr == NULL) { + return -ENOMEM; + } +#ifdef CONFIG_X86 + if (rdev->family == CHIP_RS400 || rdev->family == CHIP_RS480 || + rdev->family == CHIP_RS690 || rdev->family == CHIP_RS740) { + set_memory_uc((unsigned long)ptr, + rdev->gart.table_size >> PAGE_SHIFT); + } +#endif + rdev->gart.ptr = ptr; + memset((void *)rdev->gart.ptr, 0, rdev->gart.table_size); + return 0; +} + +/** + * radeon_gart_table_ram_free - free system ram for gart page table + * + * @rdev: radeon_device pointer + * + * Free system memory for GART page table + * (r1xx-r3xx, non-pcie r4xx, rs400). These asics require the + * gart table to be in system memory. + */ +void radeon_gart_table_ram_free(struct radeon_device *rdev) +{ + if (rdev->gart.ptr == NULL) { + return; + } +#ifdef CONFIG_X86 + if (rdev->family == CHIP_RS400 || rdev->family == CHIP_RS480 || + rdev->family == CHIP_RS690 || rdev->family == CHIP_RS740) { + set_memory_wb((unsigned long)rdev->gart.ptr, + rdev->gart.table_size >> PAGE_SHIFT); + } +#endif + pci_free_consistent(rdev->pdev, rdev->gart.table_size, + (void *)rdev->gart.ptr, + rdev->gart.table_addr); + rdev->gart.ptr = NULL; + rdev->gart.table_addr = 0; +} + +/** + * radeon_gart_table_vram_alloc - allocate vram for gart page table + * + * @rdev: radeon_device pointer + * + * Allocate video memory for GART page table + * (pcie r4xx, r5xx+). These asics require the + * gart table to be in video memory. + * Returns 0 for success, error for failure. + */ +int radeon_gart_table_vram_alloc(struct radeon_device *rdev) +{ + int r; + + if (rdev->gart.robj == NULL) { + r = radeon_bo_create(rdev, rdev->gart.table_size, + PAGE_SIZE, true, RADEON_GEM_DOMAIN_VRAM, + 0, NULL, NULL, &rdev->gart.robj); + if (r) { + return r; + } + } + return 0; +} + +/** + * radeon_gart_table_vram_pin - pin gart page table in vram + * + * @rdev: radeon_device pointer + * + * Pin the GART page table in vram so it will not be moved + * by the memory manager (pcie r4xx, r5xx+). These asics require the + * gart table to be in video memory. + * Returns 0 for success, error for failure. + */ +int radeon_gart_table_vram_pin(struct radeon_device *rdev) +{ + uint64_t gpu_addr; + int r; + + r = radeon_bo_reserve(rdev->gart.robj, false); + if (unlikely(r != 0)) + return r; + r = radeon_bo_pin(rdev->gart.robj, + RADEON_GEM_DOMAIN_VRAM, &gpu_addr); + if (r) { + radeon_bo_unreserve(rdev->gart.robj); + return r; + } + r = radeon_bo_kmap(rdev->gart.robj, &rdev->gart.ptr); + if (r) + radeon_bo_unpin(rdev->gart.robj); + radeon_bo_unreserve(rdev->gart.robj); + rdev->gart.table_addr = gpu_addr; + + if (!r) { + int i; + + /* We might have dropped some GART table updates while it wasn't + * mapped, restore all entries + */ + for (i = 0; i < rdev->gart.num_gpu_pages; i++) + radeon_gart_set_page(rdev, i, rdev->gart.pages_entry[i]); + mb(); + radeon_gart_tlb_flush(rdev); + } + + return r; +} + +/** + * radeon_gart_table_vram_unpin - unpin gart page table in vram + * + * @rdev: radeon_device pointer + * + * Unpin the GART page table in vram (pcie r4xx, r5xx+). + * These asics require the gart table to be in video memory. + */ +void radeon_gart_table_vram_unpin(struct radeon_device *rdev) +{ + int r; + + if (rdev->gart.robj == NULL) { + return; + } + r = radeon_bo_reserve(rdev->gart.robj, false); + if (likely(r == 0)) { + radeon_bo_kunmap(rdev->gart.robj); + radeon_bo_unpin(rdev->gart.robj); + radeon_bo_unreserve(rdev->gart.robj); + rdev->gart.ptr = NULL; + } +} + +/** + * radeon_gart_table_vram_free - free gart page table vram + * + * @rdev: radeon_device pointer + * + * Free the video memory used for the GART page table + * (pcie r4xx, r5xx+). These asics require the gart table to + * be in video memory. + */ +void radeon_gart_table_vram_free(struct radeon_device *rdev) +{ + if (rdev->gart.robj == NULL) { + return; + } + radeon_bo_unref(&rdev->gart.robj); +} + +/* + * Common gart functions. + */ +/** + * radeon_gart_unbind - unbind pages from the gart page table + * + * @rdev: radeon_device pointer + * @offset: offset into the GPU's gart aperture + * @pages: number of pages to unbind + * + * Unbinds the requested pages from the gart page table and + * replaces them with the dummy page (all asics). + */ +void radeon_gart_unbind(struct radeon_device *rdev, unsigned offset, + int pages) +{ + unsigned t; + unsigned p; + int i, j; + + if (!rdev->gart.ready) { + WARN(1, "trying to unbind memory from uninitialized GART !\n"); + return; + } + t = offset / RADEON_GPU_PAGE_SIZE; + p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); + for (i = 0; i < pages; i++, p++) { + if (rdev->gart.pages[p]) { + rdev->gart.pages[p] = NULL; + for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) { + rdev->gart.pages_entry[t] = rdev->dummy_page.entry; + if (rdev->gart.ptr) { + radeon_gart_set_page(rdev, t, + rdev->dummy_page.entry); + } + } + } + } + mb(); + radeon_gart_tlb_flush(rdev); +} + +/** + * radeon_gart_bind - bind pages into the gart page table + * + * @rdev: radeon_device pointer + * @offset: offset into the GPU's gart aperture + * @pages: number of pages to bind + * @pagelist: pages to bind + * @dma_addr: DMA addresses of pages + * @flags: RADEON_GART_PAGE_* flags + * + * Binds the requested pages to the gart page table + * (all asics). + * Returns 0 for success, -EINVAL for failure. + */ +int radeon_gart_bind(struct radeon_device *rdev, unsigned offset, + int pages, struct page **pagelist, dma_addr_t *dma_addr, + uint32_t flags) +{ + unsigned t; + unsigned p; + uint64_t page_base, page_entry; + int i, j; + + if (!rdev->gart.ready) { + WARN(1, "trying to bind memory to uninitialized GART !\n"); + return -EINVAL; + } + t = offset / RADEON_GPU_PAGE_SIZE; + p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); + + for (i = 0; i < pages; i++, p++) { + rdev->gart.pages[p] = pagelist[i]; + page_base = dma_addr[i]; + for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) { + page_entry = radeon_gart_get_page_entry(page_base, flags); + rdev->gart.pages_entry[t] = page_entry; + if (rdev->gart.ptr) { + radeon_gart_set_page(rdev, t, page_entry); + } + page_base += RADEON_GPU_PAGE_SIZE; + } + } + mb(); + radeon_gart_tlb_flush(rdev); + return 0; +} + +/** + * radeon_gart_init - init the driver info for managing the gart + * + * @rdev: radeon_device pointer + * + * Allocate the dummy page and init the gart driver info (all asics). + * Returns 0 for success, error for failure. + */ +int radeon_gart_init(struct radeon_device *rdev) +{ + int r, i; + + if (rdev->gart.pages) { + return 0; + } + /* We need PAGE_SIZE >= RADEON_GPU_PAGE_SIZE */ + if (PAGE_SIZE < RADEON_GPU_PAGE_SIZE) { + DRM_ERROR("Page size is smaller than GPU page size!\n"); + return -EINVAL; + } + r = radeon_dummy_page_init(rdev); + if (r) + return r; + /* Compute table size */ + rdev->gart.num_cpu_pages = rdev->mc.gtt_size / PAGE_SIZE; + rdev->gart.num_gpu_pages = rdev->mc.gtt_size / RADEON_GPU_PAGE_SIZE; + DRM_INFO("GART: num cpu pages %u, num gpu pages %u\n", + rdev->gart.num_cpu_pages, rdev->gart.num_gpu_pages); + /* Allocate pages table */ + rdev->gart.pages = vzalloc(sizeof(void *) * rdev->gart.num_cpu_pages); + if (rdev->gart.pages == NULL) { + radeon_gart_fini(rdev); + return -ENOMEM; + } + rdev->gart.pages_entry = vmalloc(sizeof(uint64_t) * + rdev->gart.num_gpu_pages); + if (rdev->gart.pages_entry == NULL) { + radeon_gart_fini(rdev); + return -ENOMEM; + } + /* set GART entry to point to the dummy page by default */ + for (i = 0; i < rdev->gart.num_gpu_pages; i++) + rdev->gart.pages_entry[i] = rdev->dummy_page.entry; + return 0; +} + +/** + * radeon_gart_fini - tear down the driver info for managing the gart + * + * @rdev: radeon_device pointer + * + * Tear down the gart driver info and free the dummy page (all asics). + */ +void radeon_gart_fini(struct radeon_device *rdev) +{ + if (rdev->gart.ready) { + /* unbind pages */ + radeon_gart_unbind(rdev, 0, rdev->gart.num_cpu_pages); + } + rdev->gart.ready = false; + vfree(rdev->gart.pages); + vfree(rdev->gart.pages_entry); + rdev->gart.pages = NULL; + rdev->gart.pages_entry = NULL; + + radeon_dummy_page_fini(rdev); +} |