diff options
Diffstat (limited to 'drivers/gpu/nvgpu/common/linux')
-rw-r--r-- | drivers/gpu/nvgpu/common/linux/nvgpu_mem.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/drivers/gpu/nvgpu/common/linux/nvgpu_mem.c b/drivers/gpu/nvgpu/common/linux/nvgpu_mem.c index 34fd6626..e4991d0d 100644 --- a/drivers/gpu/nvgpu/common/linux/nvgpu_mem.c +++ b/drivers/gpu/nvgpu/common/linux/nvgpu_mem.c | |||
@@ -15,6 +15,7 @@ | |||
15 | */ | 15 | */ |
16 | 16 | ||
17 | #include <nvgpu/dma.h> | 17 | #include <nvgpu/dma.h> |
18 | #include <nvgpu/gmmu.h> | ||
18 | #include <nvgpu/nvgpu_mem.h> | 19 | #include <nvgpu/nvgpu_mem.h> |
19 | #include <nvgpu/page_allocator.h> | 20 | #include <nvgpu/page_allocator.h> |
20 | #include <nvgpu/log.h> | 21 | #include <nvgpu/log.h> |
@@ -23,6 +24,8 @@ | |||
23 | 24 | ||
24 | #include <nvgpu/linux/dma.h> | 25 | #include <nvgpu/linux/dma.h> |
25 | 26 | ||
27 | #include "os_linux.h" | ||
28 | |||
26 | #include "gk20a/gk20a.h" | 29 | #include "gk20a/gk20a.h" |
27 | #include "gk20a/mm_gk20a.h" | 30 | #include "gk20a/mm_gk20a.h" |
28 | 31 | ||
@@ -247,6 +250,61 @@ void nvgpu_memset(struct gk20a *g, struct nvgpu_mem *mem, u32 offset, | |||
247 | } | 250 | } |
248 | 251 | ||
249 | /* | 252 | /* |
253 | * Obtain a SYSMEM address from a Linux SGL. This should eventually go away | ||
254 | * and/or become private to this file once all bad usages of Linux SGLs are | ||
255 | * cleaned up in the driver. | ||
256 | */ | ||
257 | u64 nvgpu_mem_get_addr_sgl(struct gk20a *g, struct scatterlist *sgl) | ||
258 | { | ||
259 | struct nvgpu_os_linux *l = container_of(g, struct nvgpu_os_linux, g); | ||
260 | |||
261 | if (!device_is_iommuable(l->dev)) | ||
262 | return g->ops.mm.gpu_phys_addr(g, NULL, sg_phys(sgl)); | ||
263 | |||
264 | if (sg_dma_address(sgl) == 0) | ||
265 | return g->ops.mm.gpu_phys_addr(g, NULL, sg_phys(sgl)); | ||
266 | |||
267 | if (sg_dma_address(sgl) == DMA_ERROR_CODE) | ||
268 | return 0; | ||
269 | |||
270 | return gk20a_mm_smmu_vaddr_translate(g, sg_dma_address(sgl)); | ||
271 | } | ||
272 | |||
273 | /* | ||
274 | * Obtain the address the GPU should use from the %mem assuming this is a SYSMEM | ||
275 | * allocation. | ||
276 | */ | ||
277 | static u64 nvgpu_mem_get_addr_sysmem(struct gk20a *g, struct nvgpu_mem *mem) | ||
278 | { | ||
279 | return nvgpu_mem_get_addr_sgl(g, mem->priv.sgt->sgl); | ||
280 | } | ||
281 | |||
282 | /* | ||
283 | * Return the base address of %mem. Handles whether this is a VIDMEM or SYSMEM | ||
284 | * allocation. | ||
285 | * | ||
286 | * %attrs can be NULL. If it is not NULL then it may be inspected to determine | ||
287 | * if the address needs to be modified before writing into a PTE. | ||
288 | */ | ||
289 | u64 nvgpu_mem_get_addr(struct gk20a *g, struct nvgpu_mem *mem) | ||
290 | { | ||
291 | struct nvgpu_page_alloc *alloc; | ||
292 | |||
293 | if (mem->aperture == APERTURE_SYSMEM) | ||
294 | return nvgpu_mem_get_addr_sysmem(g, mem); | ||
295 | |||
296 | /* | ||
297 | * Otherwise get the vidmem address. | ||
298 | */ | ||
299 | alloc = get_vidmem_page_alloc(mem->priv.sgt->sgl); | ||
300 | |||
301 | /* This API should not be used with > 1 chunks */ | ||
302 | WARN_ON(alloc->nr_chunks != 1); | ||
303 | |||
304 | return alloc->base; | ||
305 | } | ||
306 | |||
307 | /* | ||
250 | * Be careful how you use this! You are responsible for correctly freeing this | 308 | * Be careful how you use this! You are responsible for correctly freeing this |
251 | * memory. | 309 | * memory. |
252 | */ | 310 | */ |