2 #include "nouveau_drv.h"
3 #include <linux/pagemap.h>
5 #define NV_CTXDMA_PAGE_SHIFT 12
6 #define NV_CTXDMA_PAGE_SIZE (1 << NV_CTXDMA_PAGE_SHIFT)
7 #define NV_CTXDMA_PAGE_MASK (NV_CTXDMA_PAGE_SIZE - 1)
9 struct nouveau_sgdma_be {
10 struct ttm_backend backend;
11 struct drm_device *dev;
21 nouveau_sgdma_populate(struct ttm_backend *be, unsigned long num_pages,
22 struct page **pages, struct page *dummy_read_page)
24 struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
25 struct drm_device *dev = nvbe->dev;
27 NV_DEBUG(nvbe->dev, "num_pages = %ld\n", num_pages);
32 nvbe->pages = kmalloc(sizeof(dma_addr_t) * num_pages, GFP_KERNEL);
38 nvbe->pages[nvbe->nr_pages] =
39 pci_map_page(dev->pdev, pages[nvbe->nr_pages], 0,
40 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
41 if (pci_dma_mapping_error(dev->pdev,
42 nvbe->pages[nvbe->nr_pages])) {
54 nouveau_sgdma_clear(struct ttm_backend *be)
56 struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
57 struct drm_device *dev;
59 if (nvbe && nvbe->pages) {
66 while (nvbe->nr_pages--) {
67 pci_unmap_page(dev->pdev, nvbe->pages[nvbe->nr_pages],
68 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
76 static inline unsigned
77 nouveau_sgdma_pte(struct drm_device *dev, uint64_t offset)
79 struct drm_nouveau_private *dev_priv = dev->dev_private;
80 unsigned pte = (offset >> NV_CTXDMA_PAGE_SHIFT);
82 if (dev_priv->card_type < NV_50)
89 nouveau_sgdma_bind(struct ttm_backend *be, struct ttm_mem_reg *mem)
91 struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
92 struct drm_device *dev = nvbe->dev;
93 struct drm_nouveau_private *dev_priv = dev->dev_private;
94 struct nouveau_gpuobj *gpuobj = dev_priv->gart_info.sg_ctxdma;
97 NV_DEBUG(dev, "pg=0x%lx\n", mem->mm_node->start);
99 dev_priv->engine.instmem.prepare_access(nvbe->dev, true);
100 pte = nouveau_sgdma_pte(nvbe->dev, mem->mm_node->start << PAGE_SHIFT);
101 nvbe->pte_start = pte;
102 for (i = 0; i < nvbe->nr_pages; i++) {
103 dma_addr_t dma_offset = nvbe->pages[i];
104 uint32_t offset_l = lower_32_bits(dma_offset);
105 uint32_t offset_h = upper_32_bits(dma_offset);
107 for (j = 0; j < PAGE_SIZE / NV_CTXDMA_PAGE_SIZE; j++) {
108 if (dev_priv->card_type < NV_50)
109 nv_wo32(dev, gpuobj, pte++, offset_l | 3);
111 nv_wo32(dev, gpuobj, pte++, offset_l | 0x21);
112 nv_wo32(dev, gpuobj, pte++, offset_h & 0xff);
115 dma_offset += NV_CTXDMA_PAGE_SIZE;
118 dev_priv->engine.instmem.finish_access(nvbe->dev);
120 if (dev_priv->card_type == NV_50) {
121 nv_wr32(dev, 0x100c80, 0x00050001);
122 if (!nv_wait(0x100c80, 0x00000001, 0x00000000)) {
123 NV_ERROR(dev, "timeout: (0x100c80 & 1) == 0 (2)\n");
124 NV_ERROR(dev, "0x100c80 = 0x%08x\n",
125 nv_rd32(dev, 0x100c80));
129 nv_wr32(dev, 0x100c80, 0x00000001);
130 if (!nv_wait(0x100c80, 0x00000001, 0x00000000)) {
131 NV_ERROR(dev, "timeout: (0x100c80 & 1) == 0 (2)\n");
132 NV_ERROR(dev, "0x100c80 = 0x%08x\n",
133 nv_rd32(dev, 0x100c80));
143 nouveau_sgdma_unbind(struct ttm_backend *be)
145 struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
146 struct drm_device *dev = nvbe->dev;
147 struct drm_nouveau_private *dev_priv = dev->dev_private;
148 struct nouveau_gpuobj *gpuobj = dev_priv->gart_info.sg_ctxdma;
156 dev_priv->engine.instmem.prepare_access(nvbe->dev, true);
157 pte = nvbe->pte_start;
158 for (i = 0; i < nvbe->nr_pages; i++) {
159 dma_addr_t dma_offset = dev_priv->gart_info.sg_dummy_bus;
161 for (j = 0; j < PAGE_SIZE / NV_CTXDMA_PAGE_SIZE; j++) {
162 if (dev_priv->card_type < NV_50)
163 nv_wo32(dev, gpuobj, pte++, dma_offset | 3);
165 nv_wo32(dev, gpuobj, pte++, dma_offset | 0x21);
166 nv_wo32(dev, gpuobj, pte++, 0x00000000);
169 dma_offset += NV_CTXDMA_PAGE_SIZE;
172 dev_priv->engine.instmem.finish_access(nvbe->dev);
174 if (dev_priv->card_type == NV_50) {
175 nv_wr32(dev, 0x100c80, 0x00050001);
176 if (!nv_wait(0x100c80, 0x00000001, 0x00000000)) {
177 NV_ERROR(dev, "timeout: (0x100c80 & 1) == 0 (2)\n");
178 NV_ERROR(dev, "0x100c80 = 0x%08x\n",
179 nv_rd32(dev, 0x100c80));
183 nv_wr32(dev, 0x100c80, 0x00000001);
184 if (!nv_wait(0x100c80, 0x00000001, 0x00000000)) {
185 NV_ERROR(dev, "timeout: (0x100c80 & 1) == 0 (2)\n");
186 NV_ERROR(dev, "0x100c80 = 0x%08x\n",
187 nv_rd32(dev, 0x100c80));
197 nouveau_sgdma_destroy(struct ttm_backend *be)
199 struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
202 NV_DEBUG(nvbe->dev, "\n");
212 static struct ttm_backend_func nouveau_sgdma_backend = {
213 .populate = nouveau_sgdma_populate,
214 .clear = nouveau_sgdma_clear,
215 .bind = nouveau_sgdma_bind,
216 .unbind = nouveau_sgdma_unbind,
217 .destroy = nouveau_sgdma_destroy
221 nouveau_sgdma_init_ttm(struct drm_device *dev)
223 struct drm_nouveau_private *dev_priv = dev->dev_private;
224 struct nouveau_sgdma_be *nvbe;
226 if (!dev_priv->gart_info.sg_ctxdma)
229 nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
235 nvbe->backend.func = &nouveau_sgdma_backend;
237 return &nvbe->backend;
241 nouveau_sgdma_init(struct drm_device *dev)
243 struct drm_nouveau_private *dev_priv = dev->dev_private;
244 struct nouveau_gpuobj *gpuobj = NULL;
245 uint32_t aper_size, obj_size;
248 if (dev_priv->card_type < NV_50) {
249 aper_size = (64 * 1024 * 1024);
250 obj_size = (aper_size >> NV_CTXDMA_PAGE_SHIFT) * 4;
251 obj_size += 8; /* ctxdma header */
253 /* 1 entire VM page table */
254 aper_size = (512 * 1024 * 1024);
255 obj_size = (aper_size >> NV_CTXDMA_PAGE_SHIFT) * 8;
258 ret = nouveau_gpuobj_new(dev, NULL, obj_size, 16,
259 NVOBJ_FLAG_ALLOW_NO_REFS |
260 NVOBJ_FLAG_ZERO_ALLOC |
261 NVOBJ_FLAG_ZERO_FREE, &gpuobj);
263 NV_ERROR(dev, "Error creating sgdma object: %d\n", ret);
267 dev_priv->gart_info.sg_dummy_page =
268 alloc_page(GFP_KERNEL|__GFP_DMA32);
269 set_bit(PG_locked, &dev_priv->gart_info.sg_dummy_page->flags);
270 dev_priv->gart_info.sg_dummy_bus =
271 pci_map_page(dev->pdev, dev_priv->gart_info.sg_dummy_page, 0,
272 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
274 dev_priv->engine.instmem.prepare_access(dev, true);
275 if (dev_priv->card_type < NV_50) {
276 /* Maybe use NV_DMA_TARGET_AGP for PCIE? NVIDIA do this, and
277 * confirmed to work on c51. Perhaps means NV_DMA_TARGET_PCIE
279 nv_wo32(dev, gpuobj, 0, NV_CLASS_DMA_IN_MEMORY |
280 (1 << 12) /* PT present */ |
281 (0 << 13) /* PT *not* linear */ |
282 (NV_DMA_ACCESS_RW << 14) |
283 (NV_DMA_TARGET_PCI << 16));
284 nv_wo32(dev, gpuobj, 1, aper_size - 1);
285 for (i = 2; i < 2 + (aper_size >> 12); i++) {
286 nv_wo32(dev, gpuobj, i,
287 dev_priv->gart_info.sg_dummy_bus | 3);
290 for (i = 0; i < obj_size; i += 8) {
291 nv_wo32(dev, gpuobj, (i+0)/4,
292 dev_priv->gart_info.sg_dummy_bus | 0x21);
293 nv_wo32(dev, gpuobj, (i+4)/4, 0);
296 dev_priv->engine.instmem.finish_access(dev);
298 dev_priv->gart_info.type = NOUVEAU_GART_SGDMA;
299 dev_priv->gart_info.aper_base = 0;
300 dev_priv->gart_info.aper_size = aper_size;
301 dev_priv->gart_info.sg_ctxdma = gpuobj;
306 nouveau_sgdma_takedown(struct drm_device *dev)
308 struct drm_nouveau_private *dev_priv = dev->dev_private;
310 if (dev_priv->gart_info.sg_dummy_page) {
311 pci_unmap_page(dev->pdev, dev_priv->gart_info.sg_dummy_bus,
312 NV_CTXDMA_PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
313 unlock_page(dev_priv->gart_info.sg_dummy_page);
314 __free_page(dev_priv->gart_info.sg_dummy_page);
315 dev_priv->gart_info.sg_dummy_page = NULL;
316 dev_priv->gart_info.sg_dummy_bus = 0;
319 nouveau_gpuobj_del(dev, &dev_priv->gart_info.sg_ctxdma);
323 nouveau_sgdma_get_page(struct drm_device *dev, uint32_t offset, uint32_t *page)
325 struct drm_nouveau_private *dev_priv = dev->dev_private;
326 struct nouveau_gpuobj *gpuobj = dev_priv->gart_info.sg_ctxdma;
327 struct nouveau_instmem_engine *instmem = &dev_priv->engine.instmem;
330 pte = (offset >> NV_CTXDMA_PAGE_SHIFT);
331 if (dev_priv->card_type < NV_50) {
332 instmem->prepare_access(dev, false);
333 *page = nv_ro32(dev, gpuobj, (pte + 2)) & ~NV_CTXDMA_PAGE_MASK;
334 instmem->finish_access(dev);
338 NV_ERROR(dev, "Unimplemented on NV50\n");