2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Jerome Glisse.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
24 * Authors: Dave Airlie
29 #include <linux/seq_file.h>
30 #include <linux/slab.h>
32 #include <drm/amdgpu_drm.h>
33 #include <drm/drm_debugfs.h>
37 #include "amdgpu_trace.h"
39 #define AMDGPU_IB_TEST_TIMEOUT msecs_to_jiffies(1000)
40 #define AMDGPU_IB_TEST_GFX_XGMI_TIMEOUT msecs_to_jiffies(2000)
44 * IBs (Indirect Buffers) and areas of GPU accessible memory where
45 * commands are stored. You can put a pointer to the IB in the
46 * command ring and the hw will fetch the commands from the IB
47 * and execute them. Generally userspace acceleration drivers
48 * produce command buffers which are send to the kernel and
49 * put in IBs for execution by the requested ring.
51 static int amdgpu_debugfs_sa_init(struct amdgpu_device *adev);
54 * amdgpu_ib_get - request an IB (Indirect Buffer)
56 * @ring: ring index the IB is associated with
57 * @size: requested IB size
58 * @ib: IB object returned
60 * Request an IB (all asics). IBs are allocated using the
62 * Returns 0 on success, error on failure.
64 int amdgpu_ib_get(struct amdgpu_device *adev, struct amdgpu_vm *vm,
65 unsigned size, struct amdgpu_ib *ib)
70 r = amdgpu_sa_bo_new(&adev->ring_tmp_bo,
71 &ib->sa_bo, size, 256);
73 dev_err(adev->dev, "failed to get a new IB (%d)\n", r);
77 ib->ptr = amdgpu_sa_bo_cpu_addr(ib->sa_bo);
80 ib->gpu_addr = amdgpu_sa_bo_gpu_addr(ib->sa_bo);
87 * amdgpu_ib_free - free an IB (Indirect Buffer)
89 * @adev: amdgpu_device pointer
90 * @ib: IB object to free
91 * @f: the fence SA bo need wait on for the ib alloation
93 * Free an IB (all asics).
95 void amdgpu_ib_free(struct amdgpu_device *adev, struct amdgpu_ib *ib,
98 amdgpu_sa_bo_free(adev, &ib->sa_bo, f);
102 * amdgpu_ib_schedule - schedule an IB (Indirect Buffer) on the ring
104 * @adev: amdgpu_device pointer
105 * @num_ibs: number of IBs to schedule
106 * @ibs: IB objects to schedule
107 * @f: fence created during this submission
109 * Schedule an IB on the associated ring (all asics).
110 * Returns 0 on success, error on failure.
112 * On SI, there are two parallel engines fed from the primary ring,
113 * the CE (Constant Engine) and the DE (Drawing Engine). Since
114 * resource descriptors have moved to memory, the CE allows you to
115 * prime the caches while the DE is updating register state so that
116 * the resource descriptors will be already in cache when the draw is
117 * processed. To accomplish this, the userspace driver submits two
118 * IBs, one for the CE and one for the DE. If there is a CE IB (called
119 * a CONST_IB), it will be put on the ring prior to the DE IB. Prior
120 * to SI there was just a DE IB.
122 int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs,
123 struct amdgpu_ib *ibs, struct amdgpu_job *job,
124 struct dma_fence **f)
126 struct amdgpu_device *adev = ring->adev;
127 struct amdgpu_ib *ib = &ibs[0];
128 struct dma_fence *tmp = NULL;
129 bool skip_preamble, need_ctx_switch;
130 unsigned patch_offset = ~0;
131 struct amdgpu_vm *vm;
133 uint32_t status = 0, alloc_size;
134 unsigned fence_flags = 0;
138 bool need_pipe_sync = false;
143 /* ring tests don't use a job */
146 fence_ctx = job->base.s_fence->scheduled.context;
152 if (!ring->sched.ready) {
153 dev_err(adev->dev, "couldn't schedule ib on ring <%s>\n", ring->name);
157 if (vm && !job->vmid) {
158 dev_err(adev->dev, "VM IB without ID\n");
162 alloc_size = ring->funcs->emit_frame_size + num_ibs *
163 ring->funcs->emit_ib_size;
165 r = amdgpu_ring_alloc(ring, alloc_size);
167 dev_err(adev->dev, "scheduling IB failed (%d).\n", r);
171 need_ctx_switch = ring->current_ctx != fence_ctx;
172 if (ring->funcs->emit_pipeline_sync && job &&
173 ((tmp = amdgpu_sync_get_fence(&job->sched_sync, NULL)) ||
174 (amdgpu_sriov_vf(adev) && need_ctx_switch) ||
175 amdgpu_vm_need_pipeline_sync(ring, job))) {
176 need_pipe_sync = true;
179 trace_amdgpu_ib_pipe_sync(job, tmp);
184 if (ring->funcs->insert_start)
185 ring->funcs->insert_start(ring);
188 r = amdgpu_vm_flush(ring, job, need_pipe_sync);
190 amdgpu_ring_undo(ring);
195 if (job && ring->funcs->init_cond_exec)
196 patch_offset = amdgpu_ring_init_cond_exec(ring);
199 if (!(adev->flags & AMD_IS_APU))
202 if (ring->funcs->emit_hdp_flush)
203 amdgpu_ring_emit_hdp_flush(ring);
205 amdgpu_asic_flush_hdp(adev, ring);
209 status |= AMDGPU_HAVE_CTX_SWITCH;
211 skip_preamble = ring->current_ctx == fence_ctx;
212 if (job && ring->funcs->emit_cntxcntl) {
213 status |= job->preamble_status;
214 status |= job->preemption_status;
215 amdgpu_ring_emit_cntxcntl(ring, status);
218 for (i = 0; i < num_ibs; ++i) {
221 /* drop preamble IBs if we don't have a context switch */
222 if ((ib->flags & AMDGPU_IB_FLAG_PREAMBLE) &&
224 !(status & AMDGPU_PREAMBLE_IB_PRESENT_FIRST) &&
226 !amdgpu_sriov_vf(adev)) /* for SRIOV preemption, Preamble CE ib must be inserted anyway */
229 amdgpu_ring_emit_ib(ring, job, ib, status);
230 status &= ~AMDGPU_HAVE_CTX_SWITCH;
233 if (ring->funcs->emit_tmz)
234 amdgpu_ring_emit_tmz(ring, false);
237 if (!(adev->flags & AMD_IS_APU))
239 amdgpu_asic_invalidate_hdp(adev, ring);
241 if (ib->flags & AMDGPU_IB_FLAG_TC_WB_NOT_INVALIDATE)
242 fence_flags |= AMDGPU_FENCE_FLAG_TC_WB_ONLY;
244 /* wrap the last IB with fence */
245 if (job && job->uf_addr) {
246 amdgpu_ring_emit_fence(ring, job->uf_addr, job->uf_sequence,
247 fence_flags | AMDGPU_FENCE_FLAG_64BIT);
250 r = amdgpu_fence_emit(ring, f, fence_flags);
252 dev_err(adev->dev, "failed to emit fence (%d)\n", r);
253 if (job && job->vmid)
254 amdgpu_vmid_reset(adev, ring->funcs->vmhub, job->vmid);
255 amdgpu_ring_undo(ring);
259 if (ring->funcs->insert_end)
260 ring->funcs->insert_end(ring);
262 if (patch_offset != ~0 && ring->funcs->patch_cond_exec)
263 amdgpu_ring_patch_cond_exec(ring, patch_offset);
265 ring->current_ctx = fence_ctx;
266 if (vm && ring->funcs->emit_switch_buffer)
267 amdgpu_ring_emit_switch_buffer(ring);
268 amdgpu_ring_commit(ring);
273 * amdgpu_ib_pool_init - Init the IB (Indirect Buffer) pool
275 * @adev: amdgpu_device pointer
277 * Initialize the suballocator to manage a pool of memory
278 * for use as IBs (all asics).
279 * Returns 0 on success, error on failure.
281 int amdgpu_ib_pool_init(struct amdgpu_device *adev)
285 if (adev->ib_pool_ready) {
288 r = amdgpu_sa_bo_manager_init(adev, &adev->ring_tmp_bo,
289 AMDGPU_IB_POOL_SIZE*64*1024,
290 AMDGPU_GPU_PAGE_SIZE,
291 AMDGPU_GEM_DOMAIN_GTT);
296 adev->ib_pool_ready = true;
297 if (amdgpu_debugfs_sa_init(adev)) {
298 dev_err(adev->dev, "failed to register debugfs file for SA\n");
304 * amdgpu_ib_pool_fini - Free the IB (Indirect Buffer) pool
306 * @adev: amdgpu_device pointer
308 * Tear down the suballocator managing the pool of memory
309 * for use as IBs (all asics).
311 void amdgpu_ib_pool_fini(struct amdgpu_device *adev)
313 if (adev->ib_pool_ready) {
314 amdgpu_sa_bo_manager_fini(adev, &adev->ring_tmp_bo);
315 adev->ib_pool_ready = false;
320 * amdgpu_ib_ring_tests - test IBs on the rings
322 * @adev: amdgpu_device pointer
324 * Test an IB (Indirect Buffer) on each ring.
325 * If the test fails, disable the ring.
326 * Returns 0 on success, error if the primary GFX ring
329 int amdgpu_ib_ring_tests(struct amdgpu_device *adev)
333 long tmo_gfx, tmo_mm;
335 tmo_mm = tmo_gfx = AMDGPU_IB_TEST_TIMEOUT;
336 if (amdgpu_sriov_vf(adev)) {
337 /* for MM engines in hypervisor side they are not scheduled together
338 * with CP and SDMA engines, so even in exclusive mode MM engine could
339 * still running on other VF thus the IB TEST TIMEOUT for MM engines
340 * under SR-IOV should be set to a long time. 8 sec should be enough
341 * for the MM comes back to this VF.
343 tmo_mm = 8 * AMDGPU_IB_TEST_TIMEOUT;
346 if (amdgpu_sriov_runtime(adev)) {
347 /* for CP & SDMA engines since they are scheduled together so
348 * need to make the timeout width enough to cover the time
349 * cost waiting for it coming back under RUNTIME only
351 tmo_gfx = 8 * AMDGPU_IB_TEST_TIMEOUT;
352 } else if (adev->gmc.xgmi.hive_id) {
353 tmo_gfx = AMDGPU_IB_TEST_GFX_XGMI_TIMEOUT;
356 for (i = 0; i < adev->num_rings; ++i) {
357 struct amdgpu_ring *ring = adev->rings[i];
360 /* KIQ rings don't have an IB test because we never submit IBs
361 * to them and they have no interrupt support.
363 if (!ring->sched.ready || !ring->funcs->test_ib)
366 /* MM engine need more time */
367 if (ring->funcs->type == AMDGPU_RING_TYPE_UVD ||
368 ring->funcs->type == AMDGPU_RING_TYPE_VCE ||
369 ring->funcs->type == AMDGPU_RING_TYPE_UVD_ENC ||
370 ring->funcs->type == AMDGPU_RING_TYPE_VCN_DEC ||
371 ring->funcs->type == AMDGPU_RING_TYPE_VCN_ENC ||
372 ring->funcs->type == AMDGPU_RING_TYPE_VCN_JPEG)
377 r = amdgpu_ring_test_ib(ring, tmo);
379 DRM_DEV_DEBUG(adev->dev, "ib test on %s succeeded\n",
384 ring->sched.ready = false;
385 DRM_DEV_ERROR(adev->dev, "IB test failed on %s (%d).\n",
388 if (ring == &adev->gfx.gfx_ring[0]) {
389 /* oh, oh, that's really bad */
390 adev->accel_working = false;
403 #if defined(CONFIG_DEBUG_FS)
405 static int amdgpu_debugfs_sa_info(struct seq_file *m, void *data)
407 struct drm_info_node *node = (struct drm_info_node *) m->private;
408 struct drm_device *dev = node->minor->dev;
409 struct amdgpu_device *adev = dev->dev_private;
411 amdgpu_sa_bo_dump_debug_info(&adev->ring_tmp_bo, m);
417 static const struct drm_info_list amdgpu_debugfs_sa_list[] = {
418 {"amdgpu_sa_info", &amdgpu_debugfs_sa_info, 0, NULL},
423 static int amdgpu_debugfs_sa_init(struct amdgpu_device *adev)
425 #if defined(CONFIG_DEBUG_FS)
426 return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_sa_list, 1);