2 * Copyright 2019 Advanced Micro Devices, Inc.
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23 #include "amdgpu_vm.h"
24 #include "amdgpu_job.h"
25 #include "amdgpu_object.h"
26 #include "amdgpu_trace.h"
28 #define AMDGPU_VM_SDMA_MIN_NUM_DW 256u
29 #define AMDGPU_VM_SDMA_MAX_NUM_DW (16u * 1024u)
32 * amdgpu_vm_sdma_map_table - make sure new PDs/PTs are GTT mapped
34 * @table: newly allocated or validated PD/PT
36 static int amdgpu_vm_sdma_map_table(struct amdgpu_bo_vm *table)
38 return amdgpu_ttm_alloc_gart(&table->bo.tbo);
41 /* Allocate a new job for @count PTE updates */
42 static int amdgpu_vm_sdma_alloc_job(struct amdgpu_vm_update_params *p,
45 enum amdgpu_ib_pool_type pool = p->immediate ? AMDGPU_IB_POOL_IMMEDIATE
46 : AMDGPU_IB_POOL_DELAYED;
47 struct drm_sched_entity *entity = p->immediate ? &p->vm->immediate
52 /* estimate how many dw we need */
53 ndw = AMDGPU_VM_SDMA_MIN_NUM_DW;
56 ndw = min(ndw, AMDGPU_VM_SDMA_MAX_NUM_DW);
58 r = amdgpu_job_alloc_with_ib(p->adev, entity, AMDGPU_FENCE_OWNER_VM,
59 ndw * 4, pool, &p->job);
68 * amdgpu_vm_sdma_prepare - prepare SDMA command submission
70 * @p: see amdgpu_vm_update_params definition
71 * @sync: amdgpu_sync object with fences to wait for
74 * Negativ errno, 0 for success.
76 static int amdgpu_vm_sdma_prepare(struct amdgpu_vm_update_params *p,
77 struct amdgpu_sync *sync)
81 r = amdgpu_vm_sdma_alloc_job(p, 0);
88 r = amdgpu_sync_push_to_job(sync, p->job);
91 amdgpu_job_free(p->job);
97 * amdgpu_vm_sdma_commit - commit SDMA command submission
99 * @p: see amdgpu_vm_update_params definition
100 * @fence: resulting fence
103 * Negativ errno, 0 for success.
105 static int amdgpu_vm_sdma_commit(struct amdgpu_vm_update_params *p,
106 struct dma_fence **fence)
108 struct amdgpu_ib *ib = p->job->ibs;
109 struct amdgpu_ring *ring;
112 ring = container_of(p->vm->delayed.rq->sched, struct amdgpu_ring,
115 WARN_ON(ib->length_dw == 0);
116 amdgpu_ring_pad_ib(ring, ib);
119 atomic64_inc(&p->vm->tlb_seq);
121 WARN_ON(ib->length_dw > p->num_dw_left);
122 f = amdgpu_job_submit(p->job);
125 struct dma_fence *tmp = dma_fence_get(f);
127 swap(p->vm->last_unlocked, tmp);
130 dma_resv_add_fence(p->vm->root.bo->tbo.base.resv, f,
131 DMA_RESV_USAGE_BOOKKEEP);
134 if (fence && !p->immediate) {
136 * Most hw generations now have a separate queue for page table
137 * updates, but when the queue is shared with userspace we need
138 * the extra CPU round trip to correctly flush the TLB.
140 set_bit(DRM_SCHED_FENCE_DONT_PIPELINE, &f->flags);
148 * amdgpu_vm_sdma_copy_ptes - copy the PTEs from mapping
150 * @p: see amdgpu_vm_update_params definition
151 * @bo: PD/PT to update
152 * @pe: addr of the page entry
153 * @count: number of page entries to copy
155 * Traces the parameters and calls the DMA function to copy the PTEs.
157 static void amdgpu_vm_sdma_copy_ptes(struct amdgpu_vm_update_params *p,
158 struct amdgpu_bo *bo, uint64_t pe,
161 struct amdgpu_ib *ib = p->job->ibs;
162 uint64_t src = ib->gpu_addr;
164 src += p->num_dw_left * 4;
166 pe += amdgpu_bo_gpu_offset_no_check(bo);
167 trace_amdgpu_vm_copy_ptes(pe, src, count, p->immediate);
169 amdgpu_vm_copy_pte(p->adev, ib, pe, src, count);
173 * amdgpu_vm_sdma_set_ptes - helper to call the right asic function
175 * @p: see amdgpu_vm_update_params definition
176 * @bo: PD/PT to update
177 * @pe: byte offset of the PDE/PTE, relative to start of PDB/PTB
178 * @addr: dst addr to write into pe
179 * @count: number of page entries to update
180 * @incr: increase next addr by incr bytes
181 * @flags: hw access flags
183 * Traces the parameters and calls the right asic functions
184 * to setup the page table using the DMA.
186 static void amdgpu_vm_sdma_set_ptes(struct amdgpu_vm_update_params *p,
187 struct amdgpu_bo *bo, uint64_t pe,
188 uint64_t addr, unsigned count,
189 uint32_t incr, uint64_t flags)
191 struct amdgpu_ib *ib = p->job->ibs;
193 pe += amdgpu_bo_gpu_offset_no_check(bo);
194 trace_amdgpu_vm_set_ptes(pe, addr, count, incr, flags, p->immediate);
196 amdgpu_vm_write_pte(p->adev, ib, pe, addr | flags,
199 amdgpu_vm_set_pte_pde(p->adev, ib, pe, addr,
205 * amdgpu_vm_sdma_update - execute VM update
207 * @p: see amdgpu_vm_update_params definition
208 * @vmbo: PD/PT to update
209 * @pe: byte offset of the PDE/PTE, relative to start of PDB/PTB
210 * @addr: dst addr to write into pe
211 * @count: number of page entries to update
212 * @incr: increase next addr by incr bytes
213 * @flags: hw access flags
215 * Reserve space in the IB, setup mapping buffer on demand and write commands to
218 static int amdgpu_vm_sdma_update(struct amdgpu_vm_update_params *p,
219 struct amdgpu_bo_vm *vmbo, uint64_t pe,
220 uint64_t addr, unsigned count, uint32_t incr,
223 struct amdgpu_bo *bo = &vmbo->bo;
224 struct dma_resv_iter cursor;
225 unsigned int i, ndw, nptes;
226 struct dma_fence *fence;
230 /* Wait for PD/PT moves to be completed */
231 dma_resv_iter_begin(&cursor, bo->tbo.base.resv, DMA_RESV_USAGE_KERNEL);
232 dma_resv_for_each_fence_unlocked(&cursor, fence) {
233 dma_fence_get(fence);
234 r = drm_sched_job_add_dependency(&p->job->base, fence);
236 dma_fence_put(fence);
237 dma_resv_iter_end(&cursor);
241 dma_resv_iter_end(&cursor);
244 ndw = p->num_dw_left;
245 ndw -= p->job->ibs->length_dw;
248 r = amdgpu_vm_sdma_commit(p, NULL);
252 r = amdgpu_vm_sdma_alloc_job(p, count);
257 if (!p->pages_addr) {
258 /* set page commands needed */
259 amdgpu_vm_sdma_set_ptes(p, bo, pe, addr, count,
264 /* copy commands needed */
265 ndw -= p->adev->vm_manager.vm_pte_funcs->copy_pte_num_dw;
270 nptes = min(count, ndw / 2);
272 /* Put the PTEs at the end of the IB. */
273 p->num_dw_left -= nptes * 2;
274 pte = (uint64_t *)&(p->job->ibs->ptr[p->num_dw_left]);
275 for (i = 0; i < nptes; ++i, addr += incr) {
276 pte[i] = amdgpu_vm_map_gart(p->pages_addr, addr);
280 amdgpu_vm_sdma_copy_ptes(p, bo, pe, nptes);
289 const struct amdgpu_vm_update_funcs amdgpu_vm_sdma_funcs = {
290 .map_table = amdgpu_vm_sdma_map_table,
291 .prepare = amdgpu_vm_sdma_prepare,
292 .update = amdgpu_vm_sdma_update,
293 .commit = amdgpu_vm_sdma_commit