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28 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
31 * $FreeBSD: head/sys/dev/drm2/ttm/ttm_agp_backend.c 247835 2013-03-05 09:49:34Z kib $
35 #include <dev/drm/ttm/ttm_module.h>
36 #include <dev/drm/ttm/ttm_bo_driver.h>
37 #include <dev/drm/ttm/ttm_page_alloc.h>
39 #include <dev/drm/ttm/ttm_placement.h>
41 struct ttm_agp_backend {
43 struct agp_memory *mem;
47 MALLOC_DEFINE(M_TTM_AGP, "ttm_agp", "TTM AGP Backend");
49 static int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
51 struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
52 struct drm_mm_node *node = bo_mem->mm_node;
53 struct agp_memory *mem;
54 int ret, cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
57 mem = agp_alloc_memory(agp_be->bridge, AGP_USER_MEMORY, ttm->num_pages);
58 if (unlikely(mem == NULL))
62 for (i = 0; i < ttm->num_pages; i++) {
63 vm_page_t page = ttm->pages[i];
66 page = ttm->dummy_read_page;
68 mem->pages[mem->page_count++] = page;
73 mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY;
75 ret = agp_bind_memory(mem, node->start);
77 pr_err("AGP Bind memory failed\n");
82 static int ttm_agp_unbind(struct ttm_tt *ttm)
84 struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
87 if (agp_be->mem->is_bound)
88 return agp_unbind_memory(agp_be->mem);
89 agp_free_memory(agp_be->mem);
95 static void ttm_agp_destroy(struct ttm_tt *ttm)
97 struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
102 free(agp_be, M_TTM_AGP);
105 static struct ttm_backend_func ttm_agp_func = {
106 .bind = ttm_agp_bind,
107 .unbind = ttm_agp_unbind,
108 .destroy = ttm_agp_destroy,
111 struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev,
113 unsigned long size, uint32_t page_flags,
114 vm_page_t dummy_read_page)
116 struct ttm_agp_backend *agp_be;
118 agp_be = malloc(sizeof(*agp_be), M_TTM_AGP, M_WAITOK | M_ZERO);
121 agp_be->bridge = bridge;
122 agp_be->ttm.func = &ttm_agp_func;
124 if (ttm_tt_init(&agp_be->ttm, bdev, size, page_flags, dummy_read_page)) {
131 int ttm_agp_tt_populate(struct ttm_tt *ttm)
133 if (ttm->state != tt_unpopulated)
136 return ttm_pool_populate(ttm);
139 void ttm_agp_tt_unpopulate(struct ttm_tt *ttm)
141 ttm_pool_unpopulate(ttm);