/* * 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
*/
/* * 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 = dma_alloc_coherent(&rdev->pdev->dev, rdev->gart.table_size,
&rdev->gart.table_addr, GFP_KERNEL); if (!ptr) return -ENOMEM;
/** * 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) return;
/** * 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) 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) 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, unsignedint offset, int pages)
{ unsignedint t, 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);
}
}
}
} if (rdev->gart.ptr) {
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, unsignedint offset, int pages, struct page **pagelist, dma_addr_t *dma_addr,
uint32_t flags)
{ unsignedint t, 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 ? pagelist[i] :
rdev->dummy_page.page;
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);
/** * 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(array_size(sizeof(void *),
rdev->gart.num_cpu_pages)); if (rdev->gart.pages == NULL) {
radeon_gart_fini(rdev); return -ENOMEM;
}
rdev->gart.pages_entry = vmalloc(array_size(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;
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