drm/radeon/radeon_gart.c

62  * radeon_gart_table_ram_alloc - allocate system ram for gart page table
68  * gart table to be in system memory.
75 	ptr = dma_alloc_coherent(&rdev->pdev->dev, rdev->gart.table_size,
76 				 &rdev->gart.table_addr, GFP_KERNEL);
84 			      rdev->gart.table_size >> PAGE_SHIFT);
87 	rdev->gart.ptr = ptr;
92  * radeon_gart_table_ram_free - free system ram for gart page table
98  * gart table to be in system memory.
102 	if (!rdev->gart.ptr)
108 		set_memory_wb((unsigned long)rdev->gart.ptr,
109 			      rdev->gart.table_size >> PAGE_SHIFT);
112 	dma_free_coherent(&rdev->pdev->dev, rdev->gart.table_size,
113 			  (void *)rdev->gart.ptr, rdev->gart.table_addr);
114 	rdev->gart.ptr = NULL;
115 	rdev->gart.table_addr = 0;
119  * radeon_gart_table_vram_alloc - allocate vram for gart page table
125  * gart table to be in video memory.
132 	if (rdev->gart.robj == NULL) {
133 		r = radeon_bo_create(rdev, rdev->gart.table_size,
135 				     0, NULL, NULL, &rdev->gart.robj);
143  * radeon_gart_table_vram_pin - pin gart page table in vram
149  * gart table to be in video memory.
157 	r = radeon_bo_reserve(rdev->gart.robj, false);
160 	r = radeon_bo_pin(rdev->gart.robj,
163 		radeon_bo_unreserve(rdev->gart.robj);
166 	r = radeon_bo_kmap(rdev->gart.robj, &rdev->gart.ptr);
168 		radeon_bo_unpin(rdev->gart.robj);
169 	radeon_bo_unreserve(rdev->gart.robj);
170 	rdev->gart.table_addr = gpu_addr;
178 		for (i = 0; i < rdev->gart.num_gpu_pages; i++)
179 			radeon_gart_set_page(rdev, i, rdev->gart.pages_entry[i]);
188  * radeon_gart_table_vram_unpin - unpin gart page table in vram
193  * These asics require the gart table to be in video memory.
199 	if (!rdev->gart.robj)
202 	r = radeon_bo_reserve(rdev->gart.robj, false);
204 		radeon_bo_kunmap(rdev->gart.robj);
205 		radeon_bo_unpin(rdev->gart.robj);
206 		radeon_bo_unreserve(rdev->gart.robj);
207 		rdev->gart.ptr = NULL;
212  * radeon_gart_table_vram_free - free gart page table vram
217  * (pcie r4xx, r5xx+).  These asics require the gart table to
222 	if (!rdev->gart.robj)
225 	radeon_bo_unref(&rdev->gart.robj);
229  * Common gart functions.
232  * radeon_gart_unbind - unbind pages from the gart page table
235  * @offset: offset into the GPU's gart aperture
238  * Unbinds the requested pages from the gart page table and
247 	if (!rdev->gart.ready) {
254 		if (rdev->gart.pages[p]) {
255 			rdev->gart.pages[p] = NULL;
257 				rdev->gart.pages_entry[t] = rdev->dummy_page.entry;
258 				if (rdev->gart.ptr) {
265 	if (rdev->gart.ptr) {
272  * radeon_gart_bind - bind pages into the gart page table
275  * @offset: offset into the GPU's gart aperture
281  * Binds the requested pages to the gart page table
293 	if (!rdev->gart.ready) {
301 		rdev->gart.pages[p] = pagelist ? pagelist[i] :
306 			rdev->gart.pages_entry[t] = page_entry;
307 			if (rdev->gart.ptr)
313 	if (rdev->gart.ptr) {
321  * radeon_gart_init - init the driver info for managing the gart
325  * Allocate the dummy page and init the gart driver info (all asics).
332 	if (rdev->gart.pages)
344 	rdev->gart.num_cpu_pages = rdev->mc.gtt_size / PAGE_SIZE;
345 	rdev->gart.num_gpu_pages = rdev->mc.gtt_size / RADEON_GPU_PAGE_SIZE;
347 		 rdev->gart.num_cpu_pages, rdev->gart.num_gpu_pages);
349 	rdev->gart.pages = vzalloc(array_size(sizeof(void *),
350 				   rdev->gart.num_cpu_pages));
351 	if (rdev->gart.pages == NULL) {
355 	rdev->gart.pages_entry = vmalloc(array_size(sizeof(uint64_t),
356 						    rdev->gart.num_gpu_pages));
357 	if (rdev->gart.pages_entry == NULL) {
362 	for (i = 0; i < rdev->gart.num_gpu_pages; i++)
363 		rdev->gart.pages_entry[i] = rdev->dummy_page.entry;
368  * radeon_gart_fini - tear down the driver info for managing the gart
372  * Tear down the gart driver info and free the dummy page (all asics).
376 	if (rdev->gart.ready) {
378 		radeon_gart_unbind(rdev, 0, rdev->gart.num_cpu_pages);
380 	rdev->gart.ready = false;
381 	vfree(rdev->gart.pages);
382 	vfree(rdev->gart.pages_entry);
383 	rdev->gart.pages = NULL;
384 	rdev->gart.pages_entry = NULL;