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)
40 r = amdgpu_ttm_alloc_gart(&table->bo.tbo);
45 r = amdgpu_ttm_alloc_gart(&table->shadow->tbo);
50 /* Allocate a new job for @count PTE updates */
51 static int amdgpu_vm_sdma_alloc_job(struct amdgpu_vm_update_params *p,
54 enum amdgpu_ib_pool_type pool = p->immediate ? AMDGPU_IB_POOL_IMMEDIATE
55 : AMDGPU_IB_POOL_DELAYED;
56 struct drm_sched_entity *entity = p->immediate ? &p->vm->immediate
61 /* estimate how many dw we need */
62 ndw = AMDGPU_VM_SDMA_MIN_NUM_DW;
65 ndw = min(ndw, AMDGPU_VM_SDMA_MAX_NUM_DW);
67 r = amdgpu_job_alloc_with_ib(p->adev, entity, AMDGPU_FENCE_OWNER_VM,
68 ndw * 4, pool, &p->job);
77 * amdgpu_vm_sdma_prepare - prepare SDMA command submission
79 * @p: see amdgpu_vm_update_params definition
80 * @resv: reservation object with embedded fence
81 * @sync_mode: synchronization mode
84 * Negativ errno, 0 for success.
86 static int amdgpu_vm_sdma_prepare(struct amdgpu_vm_update_params *p,
87 struct dma_resv *resv,
88 enum amdgpu_sync_mode sync_mode)
90 struct amdgpu_sync sync;
93 r = amdgpu_vm_sdma_alloc_job(p, 0);
100 amdgpu_sync_create(&sync);
101 r = amdgpu_sync_resv(p->adev, &sync, resv, sync_mode, p->vm);
103 r = amdgpu_sync_push_to_job(&sync, p->job);
104 amdgpu_sync_free(&sync);
109 * amdgpu_vm_sdma_commit - commit SDMA command submission
111 * @p: see amdgpu_vm_update_params definition
112 * @fence: resulting fence
115 * Negativ errno, 0 for success.
117 static int amdgpu_vm_sdma_commit(struct amdgpu_vm_update_params *p,
118 struct dma_fence **fence)
120 struct amdgpu_ib *ib = p->job->ibs;
121 struct amdgpu_ring *ring;
124 ring = container_of(p->vm->delayed.rq->sched, struct amdgpu_ring,
127 WARN_ON(ib->length_dw == 0);
128 amdgpu_ring_pad_ib(ring, ib);
129 WARN_ON(ib->length_dw > p->num_dw_left);
130 f = amdgpu_job_submit(p->job);
133 struct dma_fence *tmp = dma_fence_get(f);
135 swap(p->vm->last_unlocked, tmp);
138 dma_resv_add_fence(p->vm->root.bo->tbo.base.resv, f,
139 DMA_RESV_USAGE_BOOKKEEP);
142 if (fence && !p->immediate) {
144 * Most hw generations now have a separate queue for page table
145 * updates, but when the queue is shared with userspace we need
146 * the extra CPU round trip to correctly flush the TLB.
148 set_bit(DRM_SCHED_FENCE_DONT_PIPELINE, &f->flags);
156 * amdgpu_vm_sdma_copy_ptes - copy the PTEs from mapping
158 * @p: see amdgpu_vm_update_params definition
159 * @bo: PD/PT to update
160 * @pe: addr of the page entry
161 * @count: number of page entries to copy
163 * Traces the parameters and calls the DMA function to copy the PTEs.
165 static void amdgpu_vm_sdma_copy_ptes(struct amdgpu_vm_update_params *p,
166 struct amdgpu_bo *bo, uint64_t pe,
169 struct amdgpu_ib *ib = p->job->ibs;
170 uint64_t src = ib->gpu_addr;
172 src += p->num_dw_left * 4;
174 pe += amdgpu_bo_gpu_offset_no_check(bo);
175 trace_amdgpu_vm_copy_ptes(pe, src, count, p->immediate);
177 amdgpu_vm_copy_pte(p->adev, ib, pe, src, count);
181 * amdgpu_vm_sdma_set_ptes - helper to call the right asic function
183 * @p: see amdgpu_vm_update_params definition
184 * @bo: PD/PT to update
185 * @pe: byte offset of the PDE/PTE, relative to start of PDB/PTB
186 * @addr: dst addr to write into pe
187 * @count: number of page entries to update
188 * @incr: increase next addr by incr bytes
189 * @flags: hw access flags
191 * Traces the parameters and calls the right asic functions
192 * to setup the page table using the DMA.
194 static void amdgpu_vm_sdma_set_ptes(struct amdgpu_vm_update_params *p,
195 struct amdgpu_bo *bo, uint64_t pe,
196 uint64_t addr, unsigned count,
197 uint32_t incr, uint64_t flags)
199 struct amdgpu_ib *ib = p->job->ibs;
201 pe += amdgpu_bo_gpu_offset_no_check(bo);
202 trace_amdgpu_vm_set_ptes(pe, addr, count, incr, flags, p->immediate);
204 amdgpu_vm_write_pte(p->adev, ib, pe, addr | flags,
207 amdgpu_vm_set_pte_pde(p->adev, ib, pe, addr,
213 * amdgpu_vm_sdma_update - execute VM update
215 * @p: see amdgpu_vm_update_params definition
216 * @vmbo: PD/PT to update
217 * @pe: byte offset of the PDE/PTE, relative to start of PDB/PTB
218 * @addr: dst addr to write into pe
219 * @count: number of page entries to update
220 * @incr: increase next addr by incr bytes
221 * @flags: hw access flags
223 * Reserve space in the IB, setup mapping buffer on demand and write commands to
226 static int amdgpu_vm_sdma_update(struct amdgpu_vm_update_params *p,
227 struct amdgpu_bo_vm *vmbo, uint64_t pe,
228 uint64_t addr, unsigned count, uint32_t incr,
231 struct amdgpu_bo *bo = &vmbo->bo;
232 struct dma_resv_iter cursor;
233 unsigned int i, ndw, nptes;
234 struct dma_fence *fence;
238 /* Wait for PD/PT moves to be completed */
239 dma_resv_iter_begin(&cursor, bo->tbo.base.resv, DMA_RESV_USAGE_KERNEL);
240 dma_resv_for_each_fence_unlocked(&cursor, fence) {
241 dma_fence_get(fence);
242 r = drm_sched_job_add_dependency(&p->job->base, fence);
244 dma_fence_put(fence);
245 dma_resv_iter_end(&cursor);
249 dma_resv_iter_end(&cursor);
252 ndw = p->num_dw_left;
253 ndw -= p->job->ibs->length_dw;
256 r = amdgpu_vm_sdma_commit(p, NULL);
260 r = amdgpu_vm_sdma_alloc_job(p, count);
265 if (!p->pages_addr) {
266 /* set page commands needed */
268 amdgpu_vm_sdma_set_ptes(p, vmbo->shadow, pe, addr,
270 amdgpu_vm_sdma_set_ptes(p, bo, pe, addr, count,
275 /* copy commands needed */
276 ndw -= p->adev->vm_manager.vm_pte_funcs->copy_pte_num_dw *
277 (vmbo->shadow ? 2 : 1);
282 nptes = min(count, ndw / 2);
284 /* Put the PTEs at the end of the IB. */
285 p->num_dw_left -= nptes * 2;
286 pte = (uint64_t *)&(p->job->ibs->ptr[p->num_dw_left]);
287 for (i = 0; i < nptes; ++i, addr += incr) {
288 pte[i] = amdgpu_vm_map_gart(p->pages_addr, addr);
293 amdgpu_vm_sdma_copy_ptes(p, vmbo->shadow, pe, nptes);
294 amdgpu_vm_sdma_copy_ptes(p, bo, pe, nptes);
303 const struct amdgpu_vm_update_funcs amdgpu_vm_sdma_funcs = {
304 .map_table = amdgpu_vm_sdma_map_table,
305 .prepare = amdgpu_vm_sdma_prepare,
306 .update = amdgpu_vm_sdma_update,
307 .commit = amdgpu_vm_sdma_commit