1 /* 2 * Copyright 2008 Advanced Micro Devices, Inc. 3 * Copyright 2008 Red Hat Inc. 4 * Copyright 2009 Jerome Glisse. 5 * 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: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 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. 23 * 24 * Authors: Dave Airlie 25 * Alex Deucher 26 * Jerome Glisse 27 * Christian König 28 */ 29 #include <drm/drmP.h> 30 #include "radeon.h" 31 32 /* 33 * IB 34 * IBs (Indirect Buffers) and areas of GPU accessible memory where 35 * commands are stored. You can put a pointer to the IB in the 36 * command ring and the hw will fetch the commands from the IB 37 * and execute them. Generally userspace acceleration drivers 38 * produce command buffers which are send to the kernel and 39 * put in IBs for execution by the requested ring. 40 */ 41 static int radeon_debugfs_sa_init(struct radeon_device *rdev); 42 43 /** 44 * radeon_ib_get - request an IB (Indirect Buffer) 45 * 46 * @rdev: radeon_device pointer 47 * @ring: ring index the IB is associated with 48 * @ib: IB object returned 49 * @size: requested IB size 50 * 51 * Request an IB (all asics). IBs are allocated using the 52 * suballocator. 53 * Returns 0 on success, error on failure. 54 */ 55 int radeon_ib_get(struct radeon_device *rdev, int ring, 56 struct radeon_ib *ib, struct radeon_vm *vm, 57 unsigned size) 58 { 59 int r; 60 61 r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo, &ib->sa_bo, size, 256); 62 if (r) { 63 dev_err(rdev->dev, "failed to get a new IB (%d)\n", r); 64 return r; 65 } 66 67 r = radeon_semaphore_create(rdev, &ib->semaphore); 68 if (r) { 69 return r; 70 } 71 72 ib->ring = ring; 73 ib->fence = NULL; 74 ib->ptr = radeon_sa_bo_cpu_addr(ib->sa_bo); 75 ib->vm = vm; 76 if (vm) { 77 /* ib pool is bound at RADEON_VA_IB_OFFSET in virtual address 78 * space and soffset is the offset inside the pool bo 79 */ 80 ib->gpu_addr = ib->sa_bo->soffset + RADEON_VA_IB_OFFSET; 81 } else { 82 ib->gpu_addr = radeon_sa_bo_gpu_addr(ib->sa_bo); 83 } 84 ib->is_const_ib = false; 85 86 return 0; 87 } 88 89 /** 90 * radeon_ib_free - free an IB (Indirect Buffer) 91 * 92 * @rdev: radeon_device pointer 93 * @ib: IB object to free 94 * 95 * Free an IB (all asics). 96 */ 97 void radeon_ib_free(struct radeon_device *rdev, struct radeon_ib *ib) 98 { 99 radeon_semaphore_free(rdev, &ib->semaphore, ib->fence); 100 radeon_sa_bo_free(rdev, &ib->sa_bo, ib->fence); 101 radeon_fence_unref(&ib->fence); 102 } 103 104 /** 105 * radeon_ib_schedule - schedule an IB (Indirect Buffer) on the ring 106 * 107 * @rdev: radeon_device pointer 108 * @ib: IB object to schedule 109 * @const_ib: Const IB to schedule (SI only) 110 * @hdp_flush: Whether or not to perform an HDP cache flush 111 * 112 * Schedule an IB on the associated ring (all asics). 113 * Returns 0 on success, error on failure. 114 * 115 * On SI, there are two parallel engines fed from the primary ring, 116 * the CE (Constant Engine) and the DE (Drawing Engine). Since 117 * resource descriptors have moved to memory, the CE allows you to 118 * prime the caches while the DE is updating register state so that 119 * the resource descriptors will be already in cache when the draw is 120 * processed. To accomplish this, the userspace driver submits two 121 * IBs, one for the CE and one for the DE. If there is a CE IB (called 122 * a CONST_IB), it will be put on the ring prior to the DE IB. Prior 123 * to SI there was just a DE IB. 124 */ 125 int radeon_ib_schedule(struct radeon_device *rdev, struct radeon_ib *ib, 126 struct radeon_ib *const_ib, bool hdp_flush) 127 { 128 struct radeon_ring *ring = &rdev->ring[ib->ring]; 129 int r = 0; 130 131 if (!ib->length_dw || !ring->ready) { 132 /* TODO: Nothings in the ib we should report. */ 133 dev_err(rdev->dev, "couldn't schedule ib\n"); 134 return -EINVAL; 135 } 136 137 /* 64 dwords should be enough for fence too */ 138 r = radeon_ring_lock(rdev, ring, 64 + RADEON_NUM_SYNCS * 8); 139 if (r) { 140 dev_err(rdev->dev, "scheduling IB failed (%d).\n", r); 141 return r; 142 } 143 144 /* grab a vm id if necessary */ 145 if (ib->vm) { 146 struct radeon_fence *vm_id_fence; 147 vm_id_fence = radeon_vm_grab_id(rdev, ib->vm, ib->ring); 148 radeon_semaphore_sync_fence(ib->semaphore, vm_id_fence); 149 } 150 151 /* sync with other rings */ 152 r = radeon_semaphore_sync_rings(rdev, ib->semaphore, ib->ring); 153 if (r) { 154 dev_err(rdev->dev, "failed to sync rings (%d)\n", r); 155 radeon_ring_unlock_undo(rdev, ring); 156 return r; 157 } 158 159 if (ib->vm) 160 radeon_vm_flush(rdev, ib->vm, ib->ring); 161 162 if (const_ib) { 163 radeon_ring_ib_execute(rdev, const_ib->ring, const_ib); 164 radeon_semaphore_free(rdev, &const_ib->semaphore, NULL); 165 } 166 radeon_ring_ib_execute(rdev, ib->ring, ib); 167 r = radeon_fence_emit(rdev, &ib->fence, ib->ring); 168 if (r) { 169 dev_err(rdev->dev, "failed to emit fence for new IB (%d)\n", r); 170 radeon_ring_unlock_undo(rdev, ring); 171 return r; 172 } 173 if (const_ib) { 174 const_ib->fence = radeon_fence_ref(ib->fence); 175 } 176 177 if (ib->vm) 178 radeon_vm_fence(rdev, ib->vm, ib->fence); 179 180 radeon_ring_unlock_commit(rdev, ring, hdp_flush); 181 return 0; 182 } 183 184 /** 185 * radeon_ib_pool_init - Init the IB (Indirect Buffer) pool 186 * 187 * @rdev: radeon_device pointer 188 * 189 * Initialize the suballocator to manage a pool of memory 190 * for use as IBs (all asics). 191 * Returns 0 on success, error on failure. 192 */ 193 int radeon_ib_pool_init(struct radeon_device *rdev) 194 { 195 int r; 196 197 if (rdev->ib_pool_ready) { 198 return 0; 199 } 200 201 if (rdev->family >= CHIP_BONAIRE) { 202 r = radeon_sa_bo_manager_init(rdev, &rdev->ring_tmp_bo, 203 RADEON_IB_POOL_SIZE*64*1024, 204 RADEON_GPU_PAGE_SIZE, 205 RADEON_GEM_DOMAIN_GTT, 206 RADEON_GEM_GTT_WC); 207 } else { 208 /* Before CIK, it's better to stick to cacheable GTT due 209 * to the command stream checking 210 */ 211 r = radeon_sa_bo_manager_init(rdev, &rdev->ring_tmp_bo, 212 RADEON_IB_POOL_SIZE*64*1024, 213 RADEON_GPU_PAGE_SIZE, 214 RADEON_GEM_DOMAIN_GTT, 0); 215 } 216 if (r) { 217 return r; 218 } 219 220 r = radeon_sa_bo_manager_start(rdev, &rdev->ring_tmp_bo); 221 if (r) { 222 return r; 223 } 224 225 rdev->ib_pool_ready = true; 226 if (radeon_debugfs_sa_init(rdev)) { 227 dev_err(rdev->dev, "failed to register debugfs file for SA\n"); 228 } 229 return 0; 230 } 231 232 /** 233 * radeon_ib_pool_fini - Free the IB (Indirect Buffer) pool 234 * 235 * @rdev: radeon_device pointer 236 * 237 * Tear down the suballocator managing the pool of memory 238 * for use as IBs (all asics). 239 */ 240 void radeon_ib_pool_fini(struct radeon_device *rdev) 241 { 242 if (rdev->ib_pool_ready) { 243 radeon_sa_bo_manager_suspend(rdev, &rdev->ring_tmp_bo); 244 radeon_sa_bo_manager_fini(rdev, &rdev->ring_tmp_bo); 245 rdev->ib_pool_ready = false; 246 } 247 } 248 249 /** 250 * radeon_ib_ring_tests - test IBs on the rings 251 * 252 * @rdev: radeon_device pointer 253 * 254 * Test an IB (Indirect Buffer) on each ring. 255 * If the test fails, disable the ring. 256 * Returns 0 on success, error if the primary GFX ring 257 * IB test fails. 258 */ 259 int radeon_ib_ring_tests(struct radeon_device *rdev) 260 { 261 unsigned i; 262 int r; 263 264 for (i = 0; i < RADEON_NUM_RINGS; ++i) { 265 struct radeon_ring *ring = &rdev->ring[i]; 266 267 if (!ring->ready) 268 continue; 269 270 r = radeon_ib_test(rdev, i, ring); 271 if (r) { 272 radeon_fence_driver_force_completion(rdev, i); 273 ring->ready = false; 274 rdev->needs_reset = false; 275 276 if (i == RADEON_RING_TYPE_GFX_INDEX) { 277 /* oh, oh, that's really bad */ 278 DRM_ERROR("radeon: failed testing IB on GFX ring (%d).\n", r); 279 rdev->accel_working = false; 280 return r; 281 282 } else { 283 /* still not good, but we can live with it */ 284 DRM_ERROR("radeon: failed testing IB on ring %d (%d).\n", i, r); 285 } 286 } 287 } 288 return 0; 289 } 290 291 /* 292 * Debugfs info 293 */ 294 #if defined(CONFIG_DEBUG_FS) 295 296 static int radeon_debugfs_sa_info(struct seq_file *m, void *data) 297 { 298 struct drm_info_node *node = (struct drm_info_node *) m->private; 299 struct drm_device *dev = node->minor->dev; 300 struct radeon_device *rdev = dev->dev_private; 301 302 radeon_sa_bo_dump_debug_info(&rdev->ring_tmp_bo, m); 303 304 return 0; 305 306 } 307 308 static struct drm_info_list radeon_debugfs_sa_list[] = { 309 {"radeon_sa_info", &radeon_debugfs_sa_info, 0, NULL}, 310 }; 311 312 #endif 313 314 static int radeon_debugfs_sa_init(struct radeon_device *rdev) 315 { 316 #if defined(CONFIG_DEBUG_FS) 317 return radeon_debugfs_add_files(rdev, radeon_debugfs_sa_list, 1); 318 #else 319 return 0; 320 #endif 321 } 322