2 * Copyright 2019 Advanced Micro Devices, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
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 *table)
40 r = amdgpu_ttm_alloc_gart(&table->tbo);
45 r = amdgpu_ttm_alloc_gart(&table->shadow->tbo);
51 * amdgpu_vm_sdma_prepare - prepare SDMA command submission
53 * @p: see amdgpu_vm_update_params definition
54 * @owner: owner we need to sync to
55 * @exclusive: exclusive move fence we need to sync to
58 * Negativ errno, 0 for success.
60 static int amdgpu_vm_sdma_prepare(struct amdgpu_vm_update_params *p,
61 struct dma_resv *resv,
62 enum amdgpu_sync_mode sync_mode)
64 enum amdgpu_ib_pool_type pool = p->immediate ? AMDGPU_IB_POOL_IMMEDIATE
65 : AMDGPU_IB_POOL_DELAYED;
66 unsigned int ndw = AMDGPU_VM_SDMA_MIN_NUM_DW;
69 r = amdgpu_job_alloc_with_ib(p->adev, ndw * 4, pool, &p->job);
78 return amdgpu_sync_resv(p->adev, &p->job->sync, resv, sync_mode, p->vm);
82 * amdgpu_vm_sdma_commit - commit SDMA command submission
84 * @p: see amdgpu_vm_update_params definition
85 * @fence: resulting fence
88 * Negativ errno, 0 for success.
90 static int amdgpu_vm_sdma_commit(struct amdgpu_vm_update_params *p,
91 struct dma_fence **fence)
93 struct amdgpu_ib *ib = p->job->ibs;
94 struct drm_sched_entity *entity;
95 struct amdgpu_ring *ring;
99 entity = p->immediate ? &p->vm->immediate : &p->vm->delayed;
100 ring = container_of(entity->rq->sched, struct amdgpu_ring, sched);
102 WARN_ON(ib->length_dw == 0);
103 amdgpu_ring_pad_ib(ring, ib);
104 WARN_ON(ib->length_dw > p->num_dw_left);
105 r = amdgpu_job_submit(p->job, entity, AMDGPU_FENCE_OWNER_VM, &f);
110 struct dma_fence *tmp = dma_fence_get(f);
112 swap(p->vm->last_unlocked, f);
115 amdgpu_bo_fence(p->vm->root.base.bo, f, true);
118 if (fence && !p->immediate)
124 amdgpu_job_free(p->job);
129 * amdgpu_vm_sdma_copy_ptes - copy the PTEs from mapping
131 * @p: see amdgpu_vm_update_params definition
132 * @bo: PD/PT to update
133 * @pe: addr of the page entry
134 * @count: number of page entries to copy
136 * Traces the parameters and calls the DMA function to copy the PTEs.
138 static void amdgpu_vm_sdma_copy_ptes(struct amdgpu_vm_update_params *p,
139 struct amdgpu_bo *bo, uint64_t pe,
142 struct amdgpu_ib *ib = p->job->ibs;
143 uint64_t src = ib->gpu_addr;
145 src += p->num_dw_left * 4;
147 pe += amdgpu_gmc_sign_extend(amdgpu_bo_gpu_offset_no_check(bo));
148 trace_amdgpu_vm_copy_ptes(pe, src, count, p->immediate);
150 amdgpu_vm_copy_pte(p->adev, ib, pe, src, count);
154 * amdgpu_vm_sdma_set_ptes - helper to call the right asic function
156 * @p: see amdgpu_vm_update_params definition
157 * @bo: PD/PT to update
158 * @pe: byte offset of the PDE/PTE, relative to start of PDB/PTB
159 * @addr: dst addr to write into pe
160 * @count: number of page entries to update
161 * @incr: increase next addr by incr bytes
162 * @flags: hw access flags
164 * Traces the parameters and calls the right asic functions
165 * to setup the page table using the DMA.
167 static void amdgpu_vm_sdma_set_ptes(struct amdgpu_vm_update_params *p,
168 struct amdgpu_bo *bo, uint64_t pe,
169 uint64_t addr, unsigned count,
170 uint32_t incr, uint64_t flags)
172 struct amdgpu_ib *ib = p->job->ibs;
174 pe += amdgpu_gmc_sign_extend(amdgpu_bo_gpu_offset_no_check(bo));
175 trace_amdgpu_vm_set_ptes(pe, addr, count, incr, flags, p->immediate);
177 amdgpu_vm_write_pte(p->adev, ib, pe, addr | flags,
180 amdgpu_vm_set_pte_pde(p->adev, ib, pe, addr,
186 * amdgpu_vm_sdma_update - execute VM update
188 * @p: see amdgpu_vm_update_params definition
189 * @bo: PD/PT to update
190 * @pe: byte offset of the PDE/PTE, relative to start of PDB/PTB
191 * @addr: dst addr to write into pe
192 * @count: number of page entries to update
193 * @incr: increase next addr by incr bytes
194 * @flags: hw access flags
196 * Reserve space in the IB, setup mapping buffer on demand and write commands to
199 static int amdgpu_vm_sdma_update(struct amdgpu_vm_update_params *p,
200 struct amdgpu_bo *bo, uint64_t pe,
201 uint64_t addr, unsigned count, uint32_t incr,
204 enum amdgpu_ib_pool_type pool = p->immediate ? AMDGPU_IB_POOL_IMMEDIATE
205 : AMDGPU_IB_POOL_DELAYED;
206 unsigned int i, ndw, nptes;
210 /* Wait for PD/PT moves to be completed */
211 r = amdgpu_sync_fence(&p->job->sync, bo->tbo.moving);
216 ndw = p->num_dw_left;
217 ndw -= p->job->ibs->length_dw;
220 r = amdgpu_vm_sdma_commit(p, NULL);
224 /* estimate how many dw we need */
228 ndw = max(ndw, AMDGPU_VM_SDMA_MIN_NUM_DW);
229 ndw = min(ndw, AMDGPU_VM_SDMA_MAX_NUM_DW);
231 r = amdgpu_job_alloc_with_ib(p->adev, ndw * 4, pool,
236 p->num_dw_left = ndw;
239 if (!p->pages_addr) {
240 /* set page commands needed */
242 amdgpu_vm_sdma_set_ptes(p, bo->shadow, pe, addr,
244 amdgpu_vm_sdma_set_ptes(p, bo, pe, addr, count,
249 /* copy commands needed */
250 ndw -= p->adev->vm_manager.vm_pte_funcs->copy_pte_num_dw *
251 (bo->shadow ? 2 : 1);
256 nptes = min(count, ndw / 2);
258 /* Put the PTEs at the end of the IB. */
259 p->num_dw_left -= nptes * 2;
260 pte = (uint64_t *)&(p->job->ibs->ptr[p->num_dw_left]);
261 for (i = 0; i < nptes; ++i, addr += incr) {
262 pte[i] = amdgpu_vm_map_gart(p->pages_addr, addr);
267 amdgpu_vm_sdma_copy_ptes(p, bo->shadow, pe, nptes);
268 amdgpu_vm_sdma_copy_ptes(p, bo, pe, nptes);
277 const struct amdgpu_vm_update_funcs amdgpu_vm_sdma_funcs = {
278 .map_table = amdgpu_vm_sdma_map_table,
279 .prepare = amdgpu_vm_sdma_prepare,
280 .update = amdgpu_vm_sdma_update,
281 .commit = amdgpu_vm_sdma_commit