2 #include "nouveau_drv.h"
3 #include <linux/pagemap.h>
4 #include <linux/slab.h>
6 #define NV_CTXDMA_PAGE_SHIFT 12
7 #define NV_CTXDMA_PAGE_SIZE (1 << NV_CTXDMA_PAGE_SHIFT)
8 #define NV_CTXDMA_PAGE_MASK (NV_CTXDMA_PAGE_SIZE - 1)
10 struct nouveau_sgdma_be
{
11 struct ttm_backend backend
;
12 struct drm_device
*dev
;
22 nouveau_sgdma_populate(struct ttm_backend
*be
, unsigned long num_pages
,
23 struct page
**pages
, struct page
*dummy_read_page
)
25 struct nouveau_sgdma_be
*nvbe
= (struct nouveau_sgdma_be
*)be
;
26 struct drm_device
*dev
= nvbe
->dev
;
28 NV_DEBUG(nvbe
->dev
, "num_pages = %ld\n", num_pages
);
33 nvbe
->pages
= kmalloc(sizeof(dma_addr_t
) * num_pages
, GFP_KERNEL
);
39 nvbe
->pages
[nvbe
->nr_pages
] =
40 pci_map_page(dev
->pdev
, pages
[nvbe
->nr_pages
], 0,
41 PAGE_SIZE
, PCI_DMA_BIDIRECTIONAL
);
42 if (pci_dma_mapping_error(dev
->pdev
,
43 nvbe
->pages
[nvbe
->nr_pages
])) {
55 nouveau_sgdma_clear(struct ttm_backend
*be
)
57 struct nouveau_sgdma_be
*nvbe
= (struct nouveau_sgdma_be
*)be
;
58 struct drm_device
*dev
;
60 if (nvbe
&& nvbe
->pages
) {
67 while (nvbe
->nr_pages
--) {
68 pci_unmap_page(dev
->pdev
, nvbe
->pages
[nvbe
->nr_pages
],
69 PAGE_SIZE
, PCI_DMA_BIDIRECTIONAL
);
77 static inline unsigned
78 nouveau_sgdma_pte(struct drm_device
*dev
, uint64_t offset
)
80 struct drm_nouveau_private
*dev_priv
= dev
->dev_private
;
81 unsigned pte
= (offset
>> NV_CTXDMA_PAGE_SHIFT
);
83 if (dev_priv
->card_type
< NV_50
)
90 nouveau_sgdma_bind(struct ttm_backend
*be
, struct ttm_mem_reg
*mem
)
92 struct nouveau_sgdma_be
*nvbe
= (struct nouveau_sgdma_be
*)be
;
93 struct drm_device
*dev
= nvbe
->dev
;
94 struct drm_nouveau_private
*dev_priv
= dev
->dev_private
;
95 struct nouveau_gpuobj
*gpuobj
= dev_priv
->gart_info
.sg_ctxdma
;
98 NV_DEBUG(dev
, "pg=0x%lx\n", mem
->mm_node
->start
);
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
.flush(nvbe
->dev
);
120 if (dev_priv
->card_type
== NV_50
) {
121 nv50_vm_flush(dev
, 5); /* PGRAPH */
122 nv50_vm_flush(dev
, 0); /* PFIFO */
130 nouveau_sgdma_unbind(struct ttm_backend
*be
)
132 struct nouveau_sgdma_be
*nvbe
= (struct nouveau_sgdma_be
*)be
;
133 struct drm_device
*dev
= nvbe
->dev
;
134 struct drm_nouveau_private
*dev_priv
= dev
->dev_private
;
135 struct nouveau_gpuobj
*gpuobj
= dev_priv
->gart_info
.sg_ctxdma
;
143 pte
= nvbe
->pte_start
;
144 for (i
= 0; i
< nvbe
->nr_pages
; i
++) {
145 dma_addr_t dma_offset
= dev_priv
->gart_info
.sg_dummy_bus
;
147 for (j
= 0; j
< PAGE_SIZE
/ NV_CTXDMA_PAGE_SIZE
; j
++) {
148 if (dev_priv
->card_type
< NV_50
)
149 nv_wo32(dev
, gpuobj
, pte
++, dma_offset
| 3);
151 nv_wo32(dev
, gpuobj
, pte
++, dma_offset
| 0x21);
152 nv_wo32(dev
, gpuobj
, pte
++, 0x00000000);
155 dma_offset
+= NV_CTXDMA_PAGE_SIZE
;
158 dev_priv
->engine
.instmem
.flush(nvbe
->dev
);
160 if (dev_priv
->card_type
== NV_50
) {
161 nv50_vm_flush(dev
, 5);
162 nv50_vm_flush(dev
, 0);
170 nouveau_sgdma_destroy(struct ttm_backend
*be
)
172 struct nouveau_sgdma_be
*nvbe
= (struct nouveau_sgdma_be
*)be
;
175 NV_DEBUG(nvbe
->dev
, "\n");
185 static struct ttm_backend_func nouveau_sgdma_backend
= {
186 .populate
= nouveau_sgdma_populate
,
187 .clear
= nouveau_sgdma_clear
,
188 .bind
= nouveau_sgdma_bind
,
189 .unbind
= nouveau_sgdma_unbind
,
190 .destroy
= nouveau_sgdma_destroy
194 nouveau_sgdma_init_ttm(struct drm_device
*dev
)
196 struct drm_nouveau_private
*dev_priv
= dev
->dev_private
;
197 struct nouveau_sgdma_be
*nvbe
;
199 if (!dev_priv
->gart_info
.sg_ctxdma
)
202 nvbe
= kzalloc(sizeof(*nvbe
), GFP_KERNEL
);
208 nvbe
->backend
.func
= &nouveau_sgdma_backend
;
210 return &nvbe
->backend
;
214 nouveau_sgdma_init(struct drm_device
*dev
)
216 struct drm_nouveau_private
*dev_priv
= dev
->dev_private
;
217 struct nouveau_gpuobj
*gpuobj
= NULL
;
218 uint32_t aper_size
, obj_size
;
221 if (dev_priv
->card_type
< NV_50
) {
222 aper_size
= (64 * 1024 * 1024);
223 obj_size
= (aper_size
>> NV_CTXDMA_PAGE_SHIFT
) * 4;
224 obj_size
+= 8; /* ctxdma header */
226 /* 1 entire VM page table */
227 aper_size
= (512 * 1024 * 1024);
228 obj_size
= (aper_size
>> NV_CTXDMA_PAGE_SHIFT
) * 8;
231 ret
= nouveau_gpuobj_new(dev
, NULL
, obj_size
, 16,
232 NVOBJ_FLAG_ALLOW_NO_REFS
|
233 NVOBJ_FLAG_ZERO_ALLOC
|
234 NVOBJ_FLAG_ZERO_FREE
, &gpuobj
);
236 NV_ERROR(dev
, "Error creating sgdma object: %d\n", ret
);
240 dev_priv
->gart_info
.sg_dummy_page
=
241 alloc_page(GFP_KERNEL
|__GFP_DMA32
);
242 set_bit(PG_locked
, &dev_priv
->gart_info
.sg_dummy_page
->flags
);
243 dev_priv
->gart_info
.sg_dummy_bus
=
244 pci_map_page(dev
->pdev
, dev_priv
->gart_info
.sg_dummy_page
, 0,
245 PAGE_SIZE
, PCI_DMA_BIDIRECTIONAL
);
247 if (dev_priv
->card_type
< NV_50
) {
248 /* Maybe use NV_DMA_TARGET_AGP for PCIE? NVIDIA do this, and
249 * confirmed to work on c51. Perhaps means NV_DMA_TARGET_PCIE
251 nv_wo32(dev
, gpuobj
, 0, NV_CLASS_DMA_IN_MEMORY
|
252 (1 << 12) /* PT present */ |
253 (0 << 13) /* PT *not* linear */ |
254 (NV_DMA_ACCESS_RW
<< 14) |
255 (NV_DMA_TARGET_PCI
<< 16));
256 nv_wo32(dev
, gpuobj
, 1, aper_size
- 1);
257 for (i
= 2; i
< 2 + (aper_size
>> 12); i
++) {
258 nv_wo32(dev
, gpuobj
, i
,
259 dev_priv
->gart_info
.sg_dummy_bus
| 3);
262 for (i
= 0; i
< obj_size
; i
+= 8) {
263 nv_wo32(dev
, gpuobj
, (i
+0)/4,
264 dev_priv
->gart_info
.sg_dummy_bus
| 0x21);
265 nv_wo32(dev
, gpuobj
, (i
+4)/4, 0);
268 dev_priv
->engine
.instmem
.flush(dev
);
270 dev_priv
->gart_info
.type
= NOUVEAU_GART_SGDMA
;
271 dev_priv
->gart_info
.aper_base
= 0;
272 dev_priv
->gart_info
.aper_size
= aper_size
;
273 dev_priv
->gart_info
.sg_ctxdma
= gpuobj
;
278 nouveau_sgdma_takedown(struct drm_device
*dev
)
280 struct drm_nouveau_private
*dev_priv
= dev
->dev_private
;
282 if (dev_priv
->gart_info
.sg_dummy_page
) {
283 pci_unmap_page(dev
->pdev
, dev_priv
->gart_info
.sg_dummy_bus
,
284 NV_CTXDMA_PAGE_SIZE
, PCI_DMA_BIDIRECTIONAL
);
285 unlock_page(dev_priv
->gart_info
.sg_dummy_page
);
286 __free_page(dev_priv
->gart_info
.sg_dummy_page
);
287 dev_priv
->gart_info
.sg_dummy_page
= NULL
;
288 dev_priv
->gart_info
.sg_dummy_bus
= 0;
291 nouveau_gpuobj_del(dev
, &dev_priv
->gart_info
.sg_ctxdma
);
295 nouveau_sgdma_get_page(struct drm_device
*dev
, uint32_t offset
, uint32_t *page
)
297 struct drm_nouveau_private
*dev_priv
= dev
->dev_private
;
298 struct nouveau_gpuobj
*gpuobj
= dev_priv
->gart_info
.sg_ctxdma
;
301 pte
= (offset
>> NV_CTXDMA_PAGE_SHIFT
);
302 if (dev_priv
->card_type
< NV_50
) {
303 *page
= nv_ro32(dev
, gpuobj
, (pte
+ 2)) & ~NV_CTXDMA_PAGE_MASK
;
307 NV_ERROR(dev
, "Unimplemented on NV50\n");