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 K├Ânig
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 */
41static 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 */
55int 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 radeon_sync_create(&ib->sync);
68
69 ib->ring = ring;
70 ib->fence = NULL;
71 ib->ptr = radeon_sa_bo_cpu_addr(ib->sa_bo);
72 ib->vm = vm;
73 if (vm) {
74 /* ib pool is bound at RADEON_VA_IB_OFFSET in virtual address
75 * space and soffset is the offset inside the pool bo
76 */
77 ib->gpu_addr = ib->sa_bo->soffset + RADEON_VA_IB_OFFSET;
78 } else {
79 ib->gpu_addr = radeon_sa_bo_gpu_addr(ib->sa_bo);
80 }
81 ib->is_const_ib = false;
82
83 return 0;
84}
85
86/**
87 * radeon_ib_free - free an IB (Indirect Buffer)
88 *
89 * @rdev: radeon_device pointer
90 * @ib: IB object to free
91 *
92 * Free an IB (all asics).
93 */
94void radeon_ib_free(struct radeon_device *rdev, struct radeon_ib *ib)
95{
96 radeon_sync_free(rdev, &ib->sync, ib->fence);
97 radeon_sa_bo_free(rdev, &ib->sa_bo, ib->fence);
98 radeon_fence_unref(&ib->fence);
99}
100
101/**
102 * radeon_ib_schedule - schedule an IB (Indirect Buffer) on the ring
103 *
104 * @rdev: radeon_device pointer
105 * @ib: IB object to schedule
106 * @const_ib: Const IB to schedule (SI only)
107 * @hdp_flush: Whether or not to perform an HDP cache flush
108 *
109 * Schedule an IB on the associated ring (all asics).
110 * Returns 0 on success, error on failure.
111 *
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.
121 */
122int radeon_ib_schedule(struct radeon_device *rdev, struct radeon_ib *ib,
123 struct radeon_ib *const_ib, bool hdp_flush)
124{
125 struct radeon_ring *ring = &rdev->ring[ib->ring];
126 int r = 0;
127
128 if (!ib->length_dw || !ring->ready) {
129 /* TODO: Nothings in the ib we should report. */
130 dev_err(rdev->dev, "couldn't schedule ib\n");
131 return -EINVAL;
132 }
133
134 /* 64 dwords should be enough for fence too */
135 r = radeon_ring_lock(rdev, ring, 64 + RADEON_NUM_SYNCS * 8);
136 if (r) {
137 dev_err(rdev->dev, "scheduling IB failed (%d).\n", r);
138 return r;
139 }
140
141 /* grab a vm id if necessary */
142 if (ib->vm) {
143 struct radeon_fence *vm_id_fence;
144 vm_id_fence = radeon_vm_grab_id(rdev, ib->vm, ib->ring);
145 radeon_sync_fence(&ib->sync, vm_id_fence);
146 }
147
148 /* sync with other rings */
149 r = radeon_sync_rings(rdev, &ib->sync, ib->ring);
150 if (r) {
151 dev_err(rdev->dev, "failed to sync rings (%d)\n", r);
152 radeon_ring_unlock_undo(rdev, ring);
153 return r;
154 }
155
156 if (ib->vm)
157 radeon_vm_flush(rdev, ib->vm, ib->ring,
158 ib->sync.last_vm_update);
159
160 if (const_ib) {
161 radeon_ring_ib_execute(rdev, const_ib->ring, const_ib);
162 radeon_sync_free(rdev, &const_ib->sync, NULL);
163 }
164 radeon_ring_ib_execute(rdev, ib->ring, ib);
165 r = radeon_fence_emit(rdev, &ib->fence, ib->ring);
166 if (r) {
167 dev_err(rdev->dev, "failed to emit fence for new IB (%d)\n", r);
168 radeon_ring_unlock_undo(rdev, ring);
169 return r;
170 }
171 if (const_ib) {
172 const_ib->fence = radeon_fence_ref(ib->fence);
173 }
174
175 if (ib->vm)
176 radeon_vm_fence(rdev, ib->vm, ib->fence);
177
178 radeon_ring_unlock_commit(rdev, ring, hdp_flush);
179 return 0;
180}
181
182/**
183 * radeon_ib_pool_init - Init the IB (Indirect Buffer) pool
184 *
185 * @rdev: radeon_device pointer
186 *
187 * Initialize the suballocator to manage a pool of memory
188 * for use as IBs (all asics).
189 * Returns 0 on success, error on failure.
190 */
191int radeon_ib_pool_init(struct radeon_device *rdev)
192{
193 int r;
194
195 if (rdev->ib_pool_ready) {
196 return 0;
197 }
198
199 if (rdev->family >= CHIP_BONAIRE) {
200 r = radeon_sa_bo_manager_init(rdev, &rdev->ring_tmp_bo,
201 RADEON_IB_POOL_SIZE*64*1024,
202 RADEON_GPU_PAGE_SIZE,
203 RADEON_GEM_DOMAIN_GTT,
204 RADEON_GEM_GTT_WC);
205 } else {
206 /* Before CIK, it's better to stick to cacheable GTT due
207 * to the command stream checking
208 */
209 r = radeon_sa_bo_manager_init(rdev, &rdev->ring_tmp_bo,
210 RADEON_IB_POOL_SIZE*64*1024,
211 RADEON_GPU_PAGE_SIZE,
212 RADEON_GEM_DOMAIN_GTT, 0);
213 }
214 if (r) {
215 return r;
216 }
217
218 r = radeon_sa_bo_manager_start(rdev, &rdev->ring_tmp_bo);
219 if (r) {
220 return r;
221 }
222
223 rdev->ib_pool_ready = true;
224 if (radeon_debugfs_sa_init(rdev)) {
225 dev_err(rdev->dev, "failed to register debugfs file for SA\n");
226 }
227 return 0;
228}
229
230/**
231 * radeon_ib_pool_fini - Free the IB (Indirect Buffer) pool
232 *
233 * @rdev: radeon_device pointer
234 *
235 * Tear down the suballocator managing the pool of memory
236 * for use as IBs (all asics).
237 */
238void radeon_ib_pool_fini(struct radeon_device *rdev)
239{
240 if (rdev->ib_pool_ready) {
241 radeon_sa_bo_manager_suspend(rdev, &rdev->ring_tmp_bo);
242 radeon_sa_bo_manager_fini(rdev, &rdev->ring_tmp_bo);
243 rdev->ib_pool_ready = false;
244 }
245}
246
247/**
248 * radeon_ib_ring_tests - test IBs on the rings
249 *
250 * @rdev: radeon_device pointer
251 *
252 * Test an IB (Indirect Buffer) on each ring.
253 * If the test fails, disable the ring.
254 * Returns 0 on success, error if the primary GFX ring
255 * IB test fails.
256 */
257int radeon_ib_ring_tests(struct radeon_device *rdev)
258{
259 unsigned i;
260 int r;
261
262 for (i = 0; i < RADEON_NUM_RINGS; ++i) {
263 struct radeon_ring *ring = &rdev->ring[i];
264
265 if (!ring->ready)
266 continue;
267
268 r = radeon_ib_test(rdev, i, ring);
269 if (r) {
270 radeon_fence_driver_force_completion(rdev, i);
271 ring->ready = false;
272 rdev->needs_reset = false;
273
274 if (i == RADEON_RING_TYPE_GFX_INDEX) {
275 /* oh, oh, that's really bad */
276 DRM_ERROR("radeon: failed testing IB on GFX ring (%d).\n", r);
277 rdev->accel_working = false;
278 return r;
279
280 } else {
281 /* still not good, but we can live with it */
282 DRM_ERROR("radeon: failed testing IB on ring %d (%d).\n", i, r);
283 }
284 }
285 }
286 return 0;
287}
288
289/*
290 * Debugfs info
291 */
292#if defined(CONFIG_DEBUG_FS)
293
294static int radeon_debugfs_sa_info(struct seq_file *m, void *data)
295{
296 struct drm_info_node *node = (struct drm_info_node *) m->private;
297 struct drm_device *dev = node->minor->dev;
298 struct radeon_device *rdev = dev->dev_private;
299
300 radeon_sa_bo_dump_debug_info(&rdev->ring_tmp_bo, m);
301
302 return 0;
303
304}
305
306static struct drm_info_list radeon_debugfs_sa_list[] = {
307 {"radeon_sa_info", &radeon_debugfs_sa_info, 0, NULL},
308};
309
310#endif
311
312static int radeon_debugfs_sa_init(struct radeon_device *rdev)
313{
314#if defined(CONFIG_DEBUG_FS)
315 return radeon_debugfs_add_files(rdev, radeon_debugfs_sa_list, 1);
316#else
317 return 0;
318#endif
319}
320