qxl_release.c revision 6d01f1f54c01877baad11389291c1aeab9c11e0f
1/* 2 * Copyright 2011 Red Hat, Inc. 3 * 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 * on the rights to use, copy, modify, merge, publish, distribute, sub 8 * license, and/or sell copies of the Software, and to permit persons to whom 9 * the Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER 19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 21 */ 22#include "qxl_drv.h" 23#include "qxl_object.h" 24 25/* 26 * drawable cmd cache - allocate a bunch of VRAM pages, suballocate 27 * into 256 byte chunks for now - gives 16 cmds per page. 28 * 29 * use an ida to index into the chunks? 30 */ 31/* manage releaseables */ 32/* stack them 16 high for now -drawable object is 191 */ 33#define RELEASE_SIZE 256 34#define RELEASES_PER_BO (4096 / RELEASE_SIZE) 35/* put an alloc/dealloc surface cmd into one bo and round up to 128 */ 36#define SURFACE_RELEASE_SIZE 128 37#define SURFACE_RELEASES_PER_BO (4096 / SURFACE_RELEASE_SIZE) 38 39static const int release_size_per_bo[] = { RELEASE_SIZE, SURFACE_RELEASE_SIZE, RELEASE_SIZE }; 40static const int releases_per_bo[] = { RELEASES_PER_BO, SURFACE_RELEASES_PER_BO, RELEASES_PER_BO }; 41uint64_t 42qxl_release_alloc(struct qxl_device *qdev, int type, 43 struct qxl_release **ret) 44{ 45 struct qxl_release *release; 46 int handle = 0; 47 size_t size = sizeof(*release); 48 int idr_ret; 49 50 release = kmalloc(size, GFP_KERNEL); 51 if (!release) { 52 DRM_ERROR("Out of memory\n"); 53 return 0; 54 } 55 release->type = type; 56 release->bo_count = 0; 57 release->release_offset = 0; 58 release->surface_release_id = 0; 59again: 60 if (idr_pre_get(&qdev->release_idr, GFP_KERNEL) == 0) { 61 DRM_ERROR("Out of memory for release idr\n"); 62 kfree(release); 63 goto release_fail; 64 } 65 spin_lock(&qdev->release_idr_lock); 66 idr_ret = idr_get_new_above(&qdev->release_idr, release, 1, &handle); 67 spin_unlock(&qdev->release_idr_lock); 68 if (idr_ret == -EAGAIN) 69 goto again; 70 if (ret) 71 *ret = release; 72 QXL_INFO(qdev, "allocated release %lld\n", handle); 73 release->id = handle; 74release_fail: 75 76 return handle; 77} 78 79void 80qxl_release_free(struct qxl_device *qdev, 81 struct qxl_release *release) 82{ 83 int i; 84 85 QXL_INFO(qdev, "release %d, type %d, %d bos\n", release->id, 86 release->type, release->bo_count); 87 88 if (release->surface_release_id) 89 qxl_surface_id_dealloc(qdev, release->surface_release_id); 90 91 for (i = 0 ; i < release->bo_count; ++i) { 92 QXL_INFO(qdev, "release %llx\n", 93 release->bos[i]->tbo.addr_space_offset 94 - DRM_FILE_OFFSET); 95 qxl_fence_remove_release(&release->bos[i]->fence, release->id); 96 qxl_bo_unref(&release->bos[i]); 97 } 98 spin_lock(&qdev->release_idr_lock); 99 idr_remove(&qdev->release_idr, release->id); 100 spin_unlock(&qdev->release_idr_lock); 101 kfree(release); 102} 103 104void 105qxl_release_add_res(struct qxl_device *qdev, struct qxl_release *release, 106 struct qxl_bo *bo) 107{ 108 int i; 109 for (i = 0; i < release->bo_count; i++) 110 if (release->bos[i] == bo) 111 return; 112 113 if (release->bo_count >= QXL_MAX_RES) { 114 DRM_ERROR("exceeded max resource on a qxl_release item\n"); 115 return; 116 } 117 release->bos[release->bo_count++] = qxl_bo_ref(bo); 118} 119 120static int qxl_release_bo_alloc(struct qxl_device *qdev, 121 struct qxl_bo **bo) 122{ 123 int ret; 124 ret = qxl_bo_create(qdev, PAGE_SIZE, false, QXL_GEM_DOMAIN_VRAM, NULL, 125 bo); 126 return ret; 127} 128 129int qxl_release_reserve(struct qxl_device *qdev, 130 struct qxl_release *release, bool no_wait) 131{ 132 int ret; 133 if (atomic_inc_return(&release->bos[0]->reserve_count) == 1) { 134 ret = qxl_bo_reserve(release->bos[0], no_wait); 135 if (ret) 136 return ret; 137 } 138 return 0; 139} 140 141void qxl_release_unreserve(struct qxl_device *qdev, 142 struct qxl_release *release) 143{ 144 if (atomic_dec_and_test(&release->bos[0]->reserve_count)) 145 qxl_bo_unreserve(release->bos[0]); 146} 147 148int qxl_alloc_surface_release_reserved(struct qxl_device *qdev, 149 enum qxl_surface_cmd_type surface_cmd_type, 150 struct qxl_release *create_rel, 151 struct qxl_release **release) 152{ 153 int ret; 154 155 if (surface_cmd_type == QXL_SURFACE_CMD_DESTROY && create_rel) { 156 int idr_ret; 157 struct qxl_bo *bo; 158 union qxl_release_info *info; 159 160 /* stash the release after the create command */ 161 idr_ret = qxl_release_alloc(qdev, QXL_RELEASE_SURFACE_CMD, release); 162 bo = qxl_bo_ref(create_rel->bos[0]); 163 164 (*release)->release_offset = create_rel->release_offset + 64; 165 166 qxl_release_add_res(qdev, *release, bo); 167 168 ret = qxl_release_reserve(qdev, *release, false); 169 if (ret) { 170 DRM_ERROR("release reserve failed\n"); 171 goto out_unref; 172 } 173 info = qxl_release_map(qdev, *release); 174 info->id = idr_ret; 175 qxl_release_unmap(qdev, *release, info); 176 177 178out_unref: 179 qxl_bo_unref(&bo); 180 return ret; 181 } 182 183 return qxl_alloc_release_reserved(qdev, sizeof(struct qxl_surface_cmd), 184 QXL_RELEASE_SURFACE_CMD, release, NULL); 185} 186 187int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size, 188 int type, struct qxl_release **release, 189 struct qxl_bo **rbo) 190{ 191 struct qxl_bo *bo; 192 int idr_ret; 193 int ret; 194 union qxl_release_info *info; 195 int cur_idx; 196 197 if (type == QXL_RELEASE_DRAWABLE) 198 cur_idx = 0; 199 else if (type == QXL_RELEASE_SURFACE_CMD) 200 cur_idx = 1; 201 else if (type == QXL_RELEASE_CURSOR_CMD) 202 cur_idx = 2; 203 else { 204 DRM_ERROR("got illegal type: %d\n", type); 205 return -EINVAL; 206 } 207 208 idr_ret = qxl_release_alloc(qdev, type, release); 209 210 mutex_lock(&qdev->release_mutex); 211 if (qdev->current_release_bo_offset[cur_idx] + 1 >= releases_per_bo[cur_idx]) { 212 qxl_bo_unref(&qdev->current_release_bo[cur_idx]); 213 qdev->current_release_bo_offset[cur_idx] = 0; 214 qdev->current_release_bo[cur_idx] = NULL; 215 } 216 if (!qdev->current_release_bo[cur_idx]) { 217 ret = qxl_release_bo_alloc(qdev, &qdev->current_release_bo[cur_idx]); 218 if (ret) { 219 mutex_unlock(&qdev->release_mutex); 220 return ret; 221 } 222 223 /* pin releases bo's they are too messy to evict */ 224 ret = qxl_bo_reserve(qdev->current_release_bo[cur_idx], false); 225 qxl_bo_pin(qdev->current_release_bo[cur_idx], QXL_GEM_DOMAIN_VRAM, NULL); 226 qxl_bo_unreserve(qdev->current_release_bo[cur_idx]); 227 } 228 229 bo = qxl_bo_ref(qdev->current_release_bo[cur_idx]); 230 231 (*release)->release_offset = qdev->current_release_bo_offset[cur_idx] * release_size_per_bo[cur_idx]; 232 qdev->current_release_bo_offset[cur_idx]++; 233 234 if (rbo) 235 *rbo = bo; 236 237 qxl_release_add_res(qdev, *release, bo); 238 239 ret = qxl_release_reserve(qdev, *release, false); 240 mutex_unlock(&qdev->release_mutex); 241 if (ret) 242 goto out_unref; 243 244 info = qxl_release_map(qdev, *release); 245 info->id = idr_ret; 246 qxl_release_unmap(qdev, *release, info); 247 248out_unref: 249 qxl_bo_unref(&bo); 250 return ret; 251} 252 253int qxl_fence_releaseable(struct qxl_device *qdev, 254 struct qxl_release *release) 255{ 256 int i, ret; 257 for (i = 0; i < release->bo_count; i++) { 258 if (!release->bos[i]->tbo.sync_obj) 259 release->bos[i]->tbo.sync_obj = &release->bos[i]->fence; 260 ret = qxl_fence_add_release(&release->bos[i]->fence, release->id); 261 if (ret) 262 return ret; 263 } 264 return 0; 265} 266 267struct qxl_release *qxl_release_from_id_locked(struct qxl_device *qdev, 268 uint64_t id) 269{ 270 struct qxl_release *release; 271 272 spin_lock(&qdev->release_idr_lock); 273 release = idr_find(&qdev->release_idr, id); 274 spin_unlock(&qdev->release_idr_lock); 275 if (!release) { 276 DRM_ERROR("failed to find id in release_idr\n"); 277 return NULL; 278 } 279 if (release->bo_count < 1) { 280 DRM_ERROR("read a released resource with 0 bos\n"); 281 return NULL; 282 } 283 return release; 284} 285 286union qxl_release_info *qxl_release_map(struct qxl_device *qdev, 287 struct qxl_release *release) 288{ 289 void *ptr; 290 union qxl_release_info *info; 291 struct qxl_bo *bo = release->bos[0]; 292 293 ptr = qxl_bo_kmap_atomic_page(qdev, bo, release->release_offset & PAGE_SIZE); 294 info = ptr + (release->release_offset & ~PAGE_SIZE); 295 return info; 296} 297 298void qxl_release_unmap(struct qxl_device *qdev, 299 struct qxl_release *release, 300 union qxl_release_info *info) 301{ 302 struct qxl_bo *bo = release->bos[0]; 303 void *ptr; 304 305 ptr = ((void *)info) - (release->release_offset & ~PAGE_SIZE); 306 qxl_bo_kunmap_atomic_page(qdev, bo, ptr); 307} 308