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  1. /*
  2.  * Copyright 2008 Advanced Micro Devices, Inc.
  3.  * Copyright 2008 Red Hat Inc.
  4.  * Copyright 2009 Jerome Glisse.
  5.  *
  6.  * Permission is hereby granted, free of charge, to any person obtaining a
  7.  * copy of this software and associated documentation files (the "Software"),
  8.  * to deal in the Software without restriction, including without limitation
  9.  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10.  * and/or sell copies of the Software, and to permit persons to whom the
  11.  * Software is furnished to do so, subject to the following conditions:
  12.  *
  13.  * The above copyright notice and this permission notice shall be included in
  14.  * all copies or substantial portions of the Software.
  15.  *
  16.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17.  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18.  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19.  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20.  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21.  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22.  * OTHER DEALINGS IN THE SOFTWARE.
  23.  *
  24.  * Authors: Dave Airlie
  25.  *          Alex Deucher
  26.  *          Jerome Glisse
  27.  */
  28. #include "drmP.h"
  29. #include "radeon_drm.h"
  30. #include "radeon.h"
  31. #include "radeon_reg.h"
  32.  
  33. /*
  34.  * Common GART table functions.
  35.  */
  36. int radeon_gart_table_ram_alloc(struct radeon_device *rdev)
  37. {
  38.         void *ptr;
  39.  
  40.     ptr = pci_alloc_consistent(rdev->pdev, rdev->gart.table_size,
  41.                   &rdev->gart.table_addr);
  42.         if (ptr == NULL) {
  43.                 return -ENOMEM;
  44.         }
  45. #ifdef CONFIG_X86
  46.         if (rdev->family == CHIP_RS400 || rdev->family == CHIP_RS480 ||
  47.             rdev->family == CHIP_RS690 || rdev->family == CHIP_RS740) {
  48.                 set_memory_uc((unsigned long)ptr,
  49.                               rdev->gart.table_size >> PAGE_SHIFT);
  50.         }
  51. #endif
  52.         rdev->gart.table.ram.ptr = ptr;
  53.         memset((void *)rdev->gart.table.ram.ptr, 0, rdev->gart.table_size);
  54.         return 0;
  55. }
  56.  
  57. void radeon_gart_table_ram_free(struct radeon_device *rdev)
  58. {
  59.         if (rdev->gart.table.ram.ptr == NULL) {
  60.                 return;
  61.         }
  62. #ifdef CONFIG_X86
  63.         if (rdev->family == CHIP_RS400 || rdev->family == CHIP_RS480 ||
  64.             rdev->family == CHIP_RS690 || rdev->family == CHIP_RS740) {
  65.                 set_memory_wb((unsigned long)rdev->gart.table.ram.ptr,
  66.                               rdev->gart.table_size >> PAGE_SHIFT);
  67.         }
  68. #endif
  69. //   pci_free_consistent(rdev->pdev, rdev->gart.table_size,
  70. //               (void *)rdev->gart.table.ram.ptr,
  71. //               rdev->gart.table_addr);
  72.         rdev->gart.table.ram.ptr = NULL;
  73.         rdev->gart.table_addr = 0;
  74. }
  75.  
  76. int radeon_gart_table_vram_alloc(struct radeon_device *rdev)
  77. {
  78.     int r;
  79.  
  80.     if (rdev->gart.table.vram.robj == NULL) {
  81.                 r = radeon_bo_create(rdev, NULL, rdev->gart.table_size,
  82.                                         true, RADEON_GEM_DOMAIN_VRAM,
  83.                                         &rdev->gart.table.vram.robj);
  84.         if (r) {
  85.             return r;
  86.         }
  87.     }
  88.         return 0;
  89. }
  90.  
  91. int radeon_gart_table_vram_pin(struct radeon_device *rdev)
  92. {
  93.         uint64_t gpu_addr;
  94.         int r;
  95.  
  96.         r = radeon_bo_reserve(rdev->gart.table.vram.robj, false);
  97.         if (unlikely(r != 0))
  98.                 return r;
  99.         r = radeon_bo_pin(rdev->gart.table.vram.robj,
  100.                   RADEON_GEM_DOMAIN_VRAM, &gpu_addr);
  101.     if (r) {
  102.                 radeon_bo_unreserve(rdev->gart.table.vram.robj);
  103.         return r;
  104.     }
  105.         r = radeon_bo_kmap(rdev->gart.table.vram.robj,
  106.                    (void **)&rdev->gart.table.vram.ptr);
  107.         if (r)
  108.                 radeon_bo_unpin(rdev->gart.table.vram.robj);
  109.         radeon_bo_unreserve(rdev->gart.table.vram.robj);
  110.         rdev->gart.table_addr = gpu_addr;
  111.     return r;
  112.  
  113.     dbgprintf("alloc gart vram:  gpu_base %x lin_addr %x\n",
  114.                rdev->gart.table_addr, rdev->gart.table.vram.ptr);
  115. }
  116.  
  117. void radeon_gart_table_vram_free(struct radeon_device *rdev)
  118. {
  119.         int r;
  120.  
  121.         if (rdev->gart.table.vram.robj == NULL) {
  122.                 return;
  123.         }
  124.         r = radeon_bo_reserve(rdev->gart.table.vram.robj, false);
  125.         if (likely(r == 0)) {
  126.                 radeon_bo_kunmap(rdev->gart.table.vram.robj);
  127.                 radeon_bo_unpin(rdev->gart.table.vram.robj);
  128.                 radeon_bo_unreserve(rdev->gart.table.vram.robj);
  129.         }
  130.         radeon_bo_unref(&rdev->gart.table.vram.robj);
  131. }
  132.  
  133.  
  134.  
  135.  
  136. /*
  137.  * Common gart functions.
  138.  */
  139. void radeon_gart_unbind(struct radeon_device *rdev, unsigned offset,
  140.                         int pages)
  141. {
  142.         unsigned t;
  143.         unsigned p;
  144.         int i, j;
  145.  
  146.         if (!rdev->gart.ready) {
  147.                 WARN(1, "trying to unbind memory to unitialized GART !\n");
  148.                 return;
  149.         }
  150.         t = offset / RADEON_GPU_PAGE_SIZE;
  151.         p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
  152.         for (i = 0; i < pages; i++, p++) {
  153.                 if (rdev->gart.pages[p]) {
  154. //           pci_unmap_page(rdev->pdev, rdev->gart.pages_addr[p],
  155. //                      PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
  156.                         rdev->gart.pages[p] = NULL;
  157.                         rdev->gart.pages_addr[p] = 0;
  158.                         for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
  159.                                 radeon_gart_set_page(rdev, t, 0);
  160.                         }
  161.                 }
  162.         }
  163.         mb();
  164.         radeon_gart_tlb_flush(rdev);
  165. }
  166.  
  167. int radeon_gart_bind(struct radeon_device *rdev, unsigned offset,
  168.              int pages, u32_t *pagelist)
  169. {
  170.     unsigned t;
  171.     unsigned p;
  172.     uint64_t page_base;
  173.     int i, j;
  174.  
  175.     ENTER();
  176.  
  177.     dbgprintf("offset %x pages %x list %x\n",
  178.                offset, pages, pagelist);
  179.  
  180.     if (!rdev->gart.ready) {
  181.         DRM_ERROR("trying to bind memory to unitialized GART !\n");
  182.         return -EINVAL;
  183.     }
  184.         t = offset / RADEON_GPU_PAGE_SIZE;
  185.         p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
  186.  
  187.     for (i = 0; i < pages; i++, p++) {
  188.         /* we need to support large memory configurations */
  189.         /* assume that unbind have already been call on the range */
  190.  
  191.         rdev->gart.pages_addr[p] = pagelist[i] & ~4095;
  192.  
  193.         //if (pci_dma_mapping_error(rdev->pdev, rdev->gart.pages_addr[p])) {
  194.         //    /* FIXME: failed to map page (return -ENOMEM?) */
  195.         //    radeon_gart_unbind(rdev, offset, pages);
  196.         //    return -ENOMEM;
  197.         //}
  198.         rdev->gart.pages[p] = pagelist[i];
  199.                 page_base = rdev->gart.pages_addr[p];
  200.                 for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
  201.             radeon_gart_set_page(rdev, t, page_base);
  202.                         page_base += RADEON_GPU_PAGE_SIZE;
  203.         }
  204.     }
  205.     mb();
  206.     radeon_gart_tlb_flush(rdev);
  207.     return 0;
  208. }
  209.  
  210. int radeon_gart_init(struct radeon_device *rdev)
  211. {
  212.     if (rdev->gart.pages) {
  213.         return 0;
  214.     }
  215.         /* We need PAGE_SIZE >= RADEON_GPU_PAGE_SIZE */
  216.         if (PAGE_SIZE < RADEON_GPU_PAGE_SIZE) {
  217.         DRM_ERROR("Page size is smaller than GPU page size!\n");
  218.         return -EINVAL;
  219.     }
  220.     /* Compute table size */
  221.     rdev->gart.num_cpu_pages = rdev->mc.gtt_size / PAGE_SIZE;
  222.         rdev->gart.num_gpu_pages = rdev->mc.gtt_size / RADEON_GPU_PAGE_SIZE;
  223.     DRM_INFO("GART: num cpu pages %u, num gpu pages %u\n",
  224.          rdev->gart.num_cpu_pages, rdev->gart.num_gpu_pages);
  225.     /* Allocate pages table */
  226.     rdev->gart.pages = kzalloc(sizeof(void *) * rdev->gart.num_cpu_pages,
  227.                    GFP_KERNEL);
  228.     if (rdev->gart.pages == NULL) {
  229.                 radeon_gart_fini(rdev);
  230.         return -ENOMEM;
  231.     }
  232.         rdev->gart.pages_addr = kzalloc(sizeof(dma_addr_t) *
  233.                     rdev->gart.num_cpu_pages, GFP_KERNEL);
  234.     if (rdev->gart.pages_addr == NULL) {
  235.                 radeon_gart_fini(rdev);
  236.         return -ENOMEM;
  237.     }
  238.     return 0;
  239. }
  240.  
  241. void radeon_gart_fini(struct radeon_device *rdev)
  242. {
  243.         if (rdev->gart.pages && rdev->gart.pages_addr && rdev->gart.ready) {
  244.                 /* unbind pages */
  245.                 radeon_gart_unbind(rdev, 0, rdev->gart.num_cpu_pages);
  246.         }
  247.         rdev->gart.ready = false;
  248.         kfree(rdev->gart.pages);
  249.         kfree(rdev->gart.pages_addr);
  250.         rdev->gart.pages = NULL;
  251.         rdev->gart.pages_addr = NULL;
  252. }
  253.