Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 1 | /************************************************************************** |
| 2 | * |
| 3 | * Copyright © 2015 VMware, Inc., Palo Alto, CA., USA |
| 4 | * All Rights Reserved. |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 7 | * copy of this software and associated documentation files (the |
| 8 | * "Software"), to deal in the Software without restriction, including |
| 9 | * without limitation the rights to use, copy, modify, merge, publish, |
| 10 | * distribute, sub license, and/or sell copies of the Software, and to |
| 11 | * permit persons to whom the Software is furnished to do so, subject to |
| 12 | * the following conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice (including the |
| 15 | * next paragraph) shall be included in all copies or substantial portions |
| 16 | * of the Software. |
| 17 | * |
| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
| 21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, |
| 22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
| 23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
| 24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 25 | * |
| 26 | **************************************************************************/ |
| 27 | |
| 28 | #include "vmwgfx_drv.h" |
| 29 | #include "ttm/ttm_bo_api.h" |
| 30 | |
| 31 | /* |
| 32 | * Size of inline command buffers. Try to make sure that a page size is a |
| 33 | * multiple of the DMA pool allocation size. |
| 34 | */ |
| 35 | #define VMW_CMDBUF_INLINE_ALIGN 64 |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 36 | #define VMW_CMDBUF_INLINE_SIZE \ |
| 37 | (1024 - ALIGN(sizeof(SVGACBHeader), VMW_CMDBUF_INLINE_ALIGN)) |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 38 | |
| 39 | /** |
| 40 | * struct vmw_cmdbuf_context - Command buffer context queues |
| 41 | * |
| 42 | * @submitted: List of command buffers that have been submitted to the |
| 43 | * manager but not yet submitted to hardware. |
| 44 | * @hw_submitted: List of command buffers submitted to hardware. |
| 45 | * @preempted: List of preempted command buffers. |
| 46 | * @num_hw_submitted: Number of buffers currently being processed by hardware |
| 47 | */ |
| 48 | struct vmw_cmdbuf_context { |
| 49 | struct list_head submitted; |
| 50 | struct list_head hw_submitted; |
| 51 | struct list_head preempted; |
| 52 | unsigned num_hw_submitted; |
| 53 | }; |
| 54 | |
| 55 | /** |
| 56 | * struct vmw_cmdbuf_man: - Command buffer manager |
| 57 | * |
| 58 | * @cur_mutex: Mutex protecting the command buffer used for incremental small |
| 59 | * kernel command submissions, @cur. |
| 60 | * @space_mutex: Mutex to protect against starvation when we allocate |
| 61 | * main pool buffer space. |
| 62 | * @work: A struct work_struct implementeing command buffer error handling. |
| 63 | * Immutable. |
| 64 | * @dev_priv: Pointer to the device private struct. Immutable. |
| 65 | * @ctx: Array of command buffer context queues. The queues and the context |
| 66 | * data is protected by @lock. |
| 67 | * @error: List of command buffers that have caused device errors. |
| 68 | * Protected by @lock. |
| 69 | * @mm: Range manager for the command buffer space. Manager allocations and |
| 70 | * frees are protected by @lock. |
| 71 | * @cmd_space: Buffer object for the command buffer space, unless we were |
| 72 | * able to make a contigous coherent DMA memory allocation, @handle. Immutable. |
| 73 | * @map_obj: Mapping state for @cmd_space. Immutable. |
| 74 | * @map: Pointer to command buffer space. May be a mapped buffer object or |
| 75 | * a contigous coherent DMA memory allocation. Immutable. |
| 76 | * @cur: Command buffer for small kernel command submissions. Protected by |
| 77 | * the @cur_mutex. |
| 78 | * @cur_pos: Space already used in @cur. Protected by @cur_mutex. |
| 79 | * @default_size: Default size for the @cur command buffer. Immutable. |
| 80 | * @max_hw_submitted: Max number of in-flight command buffers the device can |
| 81 | * handle. Immutable. |
| 82 | * @lock: Spinlock protecting command submission queues. |
| 83 | * @header: Pool of DMA memory for device command buffer headers. |
| 84 | * Internal protection. |
| 85 | * @dheaders: Pool of DMA memory for device command buffer headers with trailing |
| 86 | * space for inline data. Internal protection. |
| 87 | * @tasklet: Tasklet struct for irq processing. Immutable. |
| 88 | * @alloc_queue: Wait queue for processes waiting to allocate command buffer |
| 89 | * space. |
| 90 | * @idle_queue: Wait queue for processes waiting for command buffer idle. |
| 91 | * @irq_on: Whether the process function has requested irq to be turned on. |
| 92 | * Protected by @lock. |
| 93 | * @using_mob: Whether the command buffer space is a MOB or a contigous DMA |
| 94 | * allocation. Immutable. |
| 95 | * @has_pool: Has a large pool of DMA memory which allows larger allocations. |
| 96 | * Typically this is false only during bootstrap. |
| 97 | * @handle: DMA address handle for the command buffer space if @using_mob is |
| 98 | * false. Immutable. |
| 99 | * @size: The size of the command buffer space. Immutable. |
| 100 | */ |
| 101 | struct vmw_cmdbuf_man { |
| 102 | struct mutex cur_mutex; |
| 103 | struct mutex space_mutex; |
| 104 | struct work_struct work; |
| 105 | struct vmw_private *dev_priv; |
| 106 | struct vmw_cmdbuf_context ctx[SVGA_CB_CONTEXT_MAX]; |
| 107 | struct list_head error; |
| 108 | struct drm_mm mm; |
| 109 | struct ttm_buffer_object *cmd_space; |
| 110 | struct ttm_bo_kmap_obj map_obj; |
| 111 | u8 *map; |
| 112 | struct vmw_cmdbuf_header *cur; |
| 113 | size_t cur_pos; |
| 114 | size_t default_size; |
| 115 | unsigned max_hw_submitted; |
| 116 | spinlock_t lock; |
| 117 | struct dma_pool *headers; |
| 118 | struct dma_pool *dheaders; |
| 119 | struct tasklet_struct tasklet; |
| 120 | wait_queue_head_t alloc_queue; |
| 121 | wait_queue_head_t idle_queue; |
| 122 | bool irq_on; |
| 123 | bool using_mob; |
| 124 | bool has_pool; |
| 125 | dma_addr_t handle; |
| 126 | size_t size; |
| 127 | }; |
| 128 | |
| 129 | /** |
| 130 | * struct vmw_cmdbuf_header - Command buffer metadata |
| 131 | * |
| 132 | * @man: The command buffer manager. |
| 133 | * @cb_header: Device command buffer header, allocated from a DMA pool. |
| 134 | * @cb_context: The device command buffer context. |
| 135 | * @list: List head for attaching to the manager lists. |
| 136 | * @node: The range manager node. |
| 137 | * @handle. The DMA address of @cb_header. Handed to the device on command |
| 138 | * buffer submission. |
| 139 | * @cmd: Pointer to the command buffer space of this buffer. |
| 140 | * @size: Size of the command buffer space of this buffer. |
| 141 | * @reserved: Reserved space of this buffer. |
| 142 | * @inline_space: Whether inline command buffer space is used. |
| 143 | */ |
| 144 | struct vmw_cmdbuf_header { |
| 145 | struct vmw_cmdbuf_man *man; |
| 146 | SVGACBHeader *cb_header; |
| 147 | SVGACBContext cb_context; |
| 148 | struct list_head list; |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 149 | struct drm_mm_node node; |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 150 | dma_addr_t handle; |
| 151 | u8 *cmd; |
| 152 | size_t size; |
| 153 | size_t reserved; |
| 154 | bool inline_space; |
| 155 | }; |
| 156 | |
| 157 | /** |
| 158 | * struct vmw_cmdbuf_dheader - Device command buffer header with inline |
| 159 | * command buffer space. |
| 160 | * |
| 161 | * @cb_header: Device command buffer header. |
| 162 | * @cmd: Inline command buffer space. |
| 163 | */ |
| 164 | struct vmw_cmdbuf_dheader { |
| 165 | SVGACBHeader cb_header; |
| 166 | u8 cmd[VMW_CMDBUF_INLINE_SIZE] __aligned(VMW_CMDBUF_INLINE_ALIGN); |
| 167 | }; |
| 168 | |
| 169 | /** |
| 170 | * struct vmw_cmdbuf_alloc_info - Command buffer space allocation metadata |
| 171 | * |
| 172 | * @page_size: Size of requested command buffer space in pages. |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 173 | * @node: Pointer to the range manager node. |
| 174 | * @done: True if this allocation has succeeded. |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 175 | */ |
| 176 | struct vmw_cmdbuf_alloc_info { |
| 177 | size_t page_size; |
| 178 | struct drm_mm_node *node; |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 179 | bool done; |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 180 | }; |
| 181 | |
| 182 | /* Loop over each context in the command buffer manager. */ |
| 183 | #define for_each_cmdbuf_ctx(_man, _i, _ctx) \ |
| 184 | for (_i = 0, _ctx = &(_man)->ctx[0]; (_i) < SVGA_CB_CONTEXT_MAX; \ |
| 185 | ++(_i), ++(_ctx)) |
| 186 | |
| 187 | static int vmw_cmdbuf_startstop(struct vmw_cmdbuf_man *man, bool enable); |
| 188 | |
| 189 | |
| 190 | /** |
| 191 | * vmw_cmdbuf_cur_lock - Helper to lock the cur_mutex. |
| 192 | * |
| 193 | * @man: The range manager. |
| 194 | * @interruptible: Whether to wait interruptible when locking. |
| 195 | */ |
| 196 | static int vmw_cmdbuf_cur_lock(struct vmw_cmdbuf_man *man, bool interruptible) |
| 197 | { |
| 198 | if (interruptible) { |
| 199 | if (mutex_lock_interruptible(&man->cur_mutex)) |
| 200 | return -ERESTARTSYS; |
| 201 | } else { |
| 202 | mutex_lock(&man->cur_mutex); |
| 203 | } |
| 204 | |
| 205 | return 0; |
| 206 | } |
| 207 | |
| 208 | /** |
| 209 | * vmw_cmdbuf_cur_unlock - Helper to unlock the cur_mutex. |
| 210 | * |
| 211 | * @man: The range manager. |
| 212 | */ |
| 213 | static void vmw_cmdbuf_cur_unlock(struct vmw_cmdbuf_man *man) |
| 214 | { |
| 215 | mutex_unlock(&man->cur_mutex); |
| 216 | } |
| 217 | |
| 218 | /** |
| 219 | * vmw_cmdbuf_header_inline_free - Free a struct vmw_cmdbuf_header that has |
| 220 | * been used for the device context with inline command buffers. |
| 221 | * Need not be called locked. |
| 222 | * |
| 223 | * @header: Pointer to the header to free. |
| 224 | */ |
| 225 | static void vmw_cmdbuf_header_inline_free(struct vmw_cmdbuf_header *header) |
| 226 | { |
| 227 | struct vmw_cmdbuf_dheader *dheader; |
| 228 | |
| 229 | if (WARN_ON_ONCE(!header->inline_space)) |
| 230 | return; |
| 231 | |
| 232 | dheader = container_of(header->cb_header, struct vmw_cmdbuf_dheader, |
| 233 | cb_header); |
| 234 | dma_pool_free(header->man->dheaders, dheader, header->handle); |
| 235 | kfree(header); |
| 236 | } |
| 237 | |
| 238 | /** |
| 239 | * __vmw_cmdbuf_header_free - Free a struct vmw_cmdbuf_header and its |
| 240 | * associated structures. |
| 241 | * |
| 242 | * header: Pointer to the header to free. |
| 243 | * |
| 244 | * For internal use. Must be called with man::lock held. |
| 245 | */ |
| 246 | static void __vmw_cmdbuf_header_free(struct vmw_cmdbuf_header *header) |
| 247 | { |
| 248 | struct vmw_cmdbuf_man *man = header->man; |
| 249 | |
Thomas Hellstrom | fb89ac5 | 2016-01-08 20:29:39 +0100 | [diff] [blame] | 250 | lockdep_assert_held_once(&man->lock); |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 251 | |
| 252 | if (header->inline_space) { |
| 253 | vmw_cmdbuf_header_inline_free(header); |
| 254 | return; |
| 255 | } |
| 256 | |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 257 | drm_mm_remove_node(&header->node); |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 258 | wake_up_all(&man->alloc_queue); |
| 259 | if (header->cb_header) |
| 260 | dma_pool_free(man->headers, header->cb_header, |
| 261 | header->handle); |
| 262 | kfree(header); |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * vmw_cmdbuf_header_free - Free a struct vmw_cmdbuf_header and its |
| 267 | * associated structures. |
| 268 | * |
| 269 | * @header: Pointer to the header to free. |
| 270 | */ |
| 271 | void vmw_cmdbuf_header_free(struct vmw_cmdbuf_header *header) |
| 272 | { |
| 273 | struct vmw_cmdbuf_man *man = header->man; |
| 274 | |
| 275 | /* Avoid locking if inline_space */ |
| 276 | if (header->inline_space) { |
| 277 | vmw_cmdbuf_header_inline_free(header); |
| 278 | return; |
| 279 | } |
| 280 | spin_lock_bh(&man->lock); |
| 281 | __vmw_cmdbuf_header_free(header); |
| 282 | spin_unlock_bh(&man->lock); |
| 283 | } |
| 284 | |
| 285 | |
| 286 | /** |
| 287 | * vmw_cmbuf_header_submit: Submit a command buffer to hardware. |
| 288 | * |
| 289 | * @header: The header of the buffer to submit. |
| 290 | */ |
| 291 | static int vmw_cmdbuf_header_submit(struct vmw_cmdbuf_header *header) |
| 292 | { |
| 293 | struct vmw_cmdbuf_man *man = header->man; |
| 294 | u32 val; |
| 295 | |
Paul Bolle | 0e7c875 | 2016-03-03 11:26:10 +0100 | [diff] [blame] | 296 | val = upper_32_bits(header->handle); |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 297 | vmw_write(man->dev_priv, SVGA_REG_COMMAND_HIGH, val); |
Thomas Hellstrom | 2e3cc8c | 2015-08-04 15:34:14 +0200 | [diff] [blame] | 298 | |
Paul Bolle | 0e7c875 | 2016-03-03 11:26:10 +0100 | [diff] [blame] | 299 | val = lower_32_bits(header->handle); |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 300 | val |= header->cb_context & SVGA_CB_CONTEXT_MASK; |
| 301 | vmw_write(man->dev_priv, SVGA_REG_COMMAND_LOW, val); |
| 302 | |
| 303 | return header->cb_header->status; |
| 304 | } |
| 305 | |
| 306 | /** |
| 307 | * vmw_cmdbuf_ctx_init: Initialize a command buffer context. |
| 308 | * |
| 309 | * @ctx: The command buffer context to initialize |
| 310 | */ |
| 311 | static void vmw_cmdbuf_ctx_init(struct vmw_cmdbuf_context *ctx) |
| 312 | { |
| 313 | INIT_LIST_HEAD(&ctx->hw_submitted); |
| 314 | INIT_LIST_HEAD(&ctx->submitted); |
| 315 | INIT_LIST_HEAD(&ctx->preempted); |
| 316 | ctx->num_hw_submitted = 0; |
| 317 | } |
| 318 | |
| 319 | /** |
| 320 | * vmw_cmdbuf_ctx_submit: Submit command buffers from a command buffer |
| 321 | * context. |
| 322 | * |
| 323 | * @man: The command buffer manager. |
| 324 | * @ctx: The command buffer context. |
| 325 | * |
| 326 | * Submits command buffers to hardware until there are no more command |
| 327 | * buffers to submit or the hardware can't handle more command buffers. |
| 328 | */ |
| 329 | static void vmw_cmdbuf_ctx_submit(struct vmw_cmdbuf_man *man, |
| 330 | struct vmw_cmdbuf_context *ctx) |
| 331 | { |
| 332 | while (ctx->num_hw_submitted < man->max_hw_submitted && |
| 333 | !list_empty(&ctx->submitted)) { |
| 334 | struct vmw_cmdbuf_header *entry; |
| 335 | SVGACBStatus status; |
| 336 | |
| 337 | entry = list_first_entry(&ctx->submitted, |
| 338 | struct vmw_cmdbuf_header, |
| 339 | list); |
| 340 | |
| 341 | status = vmw_cmdbuf_header_submit(entry); |
| 342 | |
| 343 | /* This should never happen */ |
| 344 | if (WARN_ON_ONCE(status == SVGA_CB_STATUS_QUEUE_FULL)) { |
| 345 | entry->cb_header->status = SVGA_CB_STATUS_NONE; |
| 346 | break; |
| 347 | } |
| 348 | |
| 349 | list_del(&entry->list); |
| 350 | list_add_tail(&entry->list, &ctx->hw_submitted); |
| 351 | ctx->num_hw_submitted++; |
| 352 | } |
| 353 | |
| 354 | } |
| 355 | |
| 356 | /** |
| 357 | * vmw_cmdbuf_ctx_submit: Process a command buffer context. |
| 358 | * |
| 359 | * @man: The command buffer manager. |
| 360 | * @ctx: The command buffer context. |
| 361 | * |
| 362 | * Submit command buffers to hardware if possible, and process finished |
| 363 | * buffers. Typically freeing them, but on preemption or error take |
| 364 | * appropriate action. Wake up waiters if appropriate. |
| 365 | */ |
| 366 | static void vmw_cmdbuf_ctx_process(struct vmw_cmdbuf_man *man, |
| 367 | struct vmw_cmdbuf_context *ctx, |
| 368 | int *notempty) |
| 369 | { |
| 370 | struct vmw_cmdbuf_header *entry, *next; |
| 371 | |
| 372 | vmw_cmdbuf_ctx_submit(man, ctx); |
| 373 | |
| 374 | list_for_each_entry_safe(entry, next, &ctx->hw_submitted, list) { |
| 375 | SVGACBStatus status = entry->cb_header->status; |
| 376 | |
| 377 | if (status == SVGA_CB_STATUS_NONE) |
| 378 | break; |
| 379 | |
| 380 | list_del(&entry->list); |
| 381 | wake_up_all(&man->idle_queue); |
| 382 | ctx->num_hw_submitted--; |
| 383 | switch (status) { |
| 384 | case SVGA_CB_STATUS_COMPLETED: |
| 385 | __vmw_cmdbuf_header_free(entry); |
| 386 | break; |
| 387 | case SVGA_CB_STATUS_COMMAND_ERROR: |
| 388 | case SVGA_CB_STATUS_CB_HEADER_ERROR: |
| 389 | list_add_tail(&entry->list, &man->error); |
| 390 | schedule_work(&man->work); |
| 391 | break; |
| 392 | case SVGA_CB_STATUS_PREEMPTED: |
| 393 | list_add(&entry->list, &ctx->preempted); |
| 394 | break; |
| 395 | default: |
| 396 | WARN_ONCE(true, "Undefined command buffer status.\n"); |
| 397 | __vmw_cmdbuf_header_free(entry); |
| 398 | break; |
| 399 | } |
| 400 | } |
| 401 | |
| 402 | vmw_cmdbuf_ctx_submit(man, ctx); |
| 403 | if (!list_empty(&ctx->submitted)) |
| 404 | (*notempty)++; |
| 405 | } |
| 406 | |
| 407 | /** |
| 408 | * vmw_cmdbuf_man_process - Process all command buffer contexts and |
| 409 | * switch on and off irqs as appropriate. |
| 410 | * |
| 411 | * @man: The command buffer manager. |
| 412 | * |
| 413 | * Calls vmw_cmdbuf_ctx_process() on all contexts. If any context has |
| 414 | * command buffers left that are not submitted to hardware, Make sure |
Thomas Hellstrom | 09dc138 | 2015-10-21 21:31:49 +0200 | [diff] [blame] | 415 | * IRQ handling is turned on. Otherwise, make sure it's turned off. |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 416 | */ |
Thomas Hellstrom | 09dc138 | 2015-10-21 21:31:49 +0200 | [diff] [blame] | 417 | static void vmw_cmdbuf_man_process(struct vmw_cmdbuf_man *man) |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 418 | { |
Thomas Hellstrom | 09dc138 | 2015-10-21 21:31:49 +0200 | [diff] [blame] | 419 | int notempty; |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 420 | struct vmw_cmdbuf_context *ctx; |
| 421 | int i; |
| 422 | |
Thomas Hellstrom | 09dc138 | 2015-10-21 21:31:49 +0200 | [diff] [blame] | 423 | retry: |
| 424 | notempty = 0; |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 425 | for_each_cmdbuf_ctx(man, i, ctx) |
| 426 | vmw_cmdbuf_ctx_process(man, ctx, ¬empty); |
| 427 | |
| 428 | if (man->irq_on && !notempty) { |
| 429 | vmw_generic_waiter_remove(man->dev_priv, |
| 430 | SVGA_IRQFLAG_COMMAND_BUFFER, |
| 431 | &man->dev_priv->cmdbuf_waiters); |
| 432 | man->irq_on = false; |
| 433 | } else if (!man->irq_on && notempty) { |
| 434 | vmw_generic_waiter_add(man->dev_priv, |
| 435 | SVGA_IRQFLAG_COMMAND_BUFFER, |
| 436 | &man->dev_priv->cmdbuf_waiters); |
| 437 | man->irq_on = true; |
| 438 | |
| 439 | /* Rerun in case we just missed an irq. */ |
Thomas Hellstrom | 09dc138 | 2015-10-21 21:31:49 +0200 | [diff] [blame] | 440 | goto retry; |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 441 | } |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 442 | } |
| 443 | |
| 444 | /** |
| 445 | * vmw_cmdbuf_ctx_add - Schedule a command buffer for submission on a |
| 446 | * command buffer context |
| 447 | * |
| 448 | * @man: The command buffer manager. |
| 449 | * @header: The header of the buffer to submit. |
| 450 | * @cb_context: The command buffer context to use. |
| 451 | * |
| 452 | * This function adds @header to the "submitted" queue of the command |
| 453 | * buffer context identified by @cb_context. It then calls the command buffer |
| 454 | * manager processing to potentially submit the buffer to hardware. |
| 455 | * @man->lock needs to be held when calling this function. |
| 456 | */ |
| 457 | static void vmw_cmdbuf_ctx_add(struct vmw_cmdbuf_man *man, |
| 458 | struct vmw_cmdbuf_header *header, |
| 459 | SVGACBContext cb_context) |
| 460 | { |
| 461 | if (!(header->cb_header->flags & SVGA_CB_FLAG_DX_CONTEXT)) |
| 462 | header->cb_header->dxContext = 0; |
| 463 | header->cb_context = cb_context; |
| 464 | list_add_tail(&header->list, &man->ctx[cb_context].submitted); |
| 465 | |
Thomas Hellstrom | 09dc138 | 2015-10-21 21:31:49 +0200 | [diff] [blame] | 466 | vmw_cmdbuf_man_process(man); |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 467 | } |
| 468 | |
| 469 | /** |
| 470 | * vmw_cmdbuf_man_tasklet - The main part of the command buffer interrupt |
| 471 | * handler implemented as a tasklet. |
| 472 | * |
| 473 | * @data: Tasklet closure. A pointer to the command buffer manager cast to |
| 474 | * an unsigned long. |
| 475 | * |
| 476 | * The bottom half (tasklet) of the interrupt handler simply calls into the |
| 477 | * command buffer processor to free finished buffers and submit any |
| 478 | * queued buffers to hardware. |
| 479 | */ |
| 480 | static void vmw_cmdbuf_man_tasklet(unsigned long data) |
| 481 | { |
| 482 | struct vmw_cmdbuf_man *man = (struct vmw_cmdbuf_man *) data; |
| 483 | |
| 484 | spin_lock(&man->lock); |
Thomas Hellstrom | 09dc138 | 2015-10-21 21:31:49 +0200 | [diff] [blame] | 485 | vmw_cmdbuf_man_process(man); |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 486 | spin_unlock(&man->lock); |
| 487 | } |
| 488 | |
| 489 | /** |
| 490 | * vmw_cmdbuf_work_func - The deferred work function that handles |
| 491 | * command buffer errors. |
| 492 | * |
| 493 | * @work: The work func closure argument. |
| 494 | * |
| 495 | * Restarting the command buffer context after an error requires process |
| 496 | * context, so it is deferred to this work function. |
| 497 | */ |
| 498 | static void vmw_cmdbuf_work_func(struct work_struct *work) |
| 499 | { |
| 500 | struct vmw_cmdbuf_man *man = |
| 501 | container_of(work, struct vmw_cmdbuf_man, work); |
| 502 | struct vmw_cmdbuf_header *entry, *next; |
Thomas Hellstrom | 09dc138 | 2015-10-21 21:31:49 +0200 | [diff] [blame] | 503 | uint32_t dummy; |
Thomas Hellstrom | 6a5278e | 2015-08-04 15:37:16 +0200 | [diff] [blame] | 504 | bool restart = false; |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 505 | |
| 506 | spin_lock_bh(&man->lock); |
| 507 | list_for_each_entry_safe(entry, next, &man->error, list) { |
| 508 | restart = true; |
| 509 | DRM_ERROR("Command buffer error.\n"); |
| 510 | |
| 511 | list_del(&entry->list); |
| 512 | __vmw_cmdbuf_header_free(entry); |
| 513 | wake_up_all(&man->idle_queue); |
| 514 | } |
| 515 | spin_unlock_bh(&man->lock); |
| 516 | |
| 517 | if (restart && vmw_cmdbuf_startstop(man, true)) |
| 518 | DRM_ERROR("Failed restarting command buffer context 0.\n"); |
| 519 | |
Thomas Hellstrom | 09dc138 | 2015-10-21 21:31:49 +0200 | [diff] [blame] | 520 | /* Send a new fence in case one was removed */ |
| 521 | vmw_fifo_send_fence(man->dev_priv, &dummy); |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 522 | } |
| 523 | |
| 524 | /** |
| 525 | * vmw_cmdbuf_man idle - Check whether the command buffer manager is idle. |
| 526 | * |
| 527 | * @man: The command buffer manager. |
| 528 | * @check_preempted: Check also the preempted queue for pending command buffers. |
| 529 | * |
| 530 | */ |
| 531 | static bool vmw_cmdbuf_man_idle(struct vmw_cmdbuf_man *man, |
| 532 | bool check_preempted) |
| 533 | { |
| 534 | struct vmw_cmdbuf_context *ctx; |
| 535 | bool idle = false; |
| 536 | int i; |
| 537 | |
| 538 | spin_lock_bh(&man->lock); |
| 539 | vmw_cmdbuf_man_process(man); |
| 540 | for_each_cmdbuf_ctx(man, i, ctx) { |
| 541 | if (!list_empty(&ctx->submitted) || |
| 542 | !list_empty(&ctx->hw_submitted) || |
| 543 | (check_preempted && !list_empty(&ctx->preempted))) |
| 544 | goto out_unlock; |
| 545 | } |
| 546 | |
| 547 | idle = list_empty(&man->error); |
| 548 | |
| 549 | out_unlock: |
| 550 | spin_unlock_bh(&man->lock); |
| 551 | |
| 552 | return idle; |
| 553 | } |
| 554 | |
| 555 | /** |
| 556 | * __vmw_cmdbuf_cur_flush - Flush the current command buffer for small kernel |
| 557 | * command submissions |
| 558 | * |
| 559 | * @man: The command buffer manager. |
| 560 | * |
| 561 | * Flushes the current command buffer without allocating a new one. A new one |
| 562 | * is automatically allocated when needed. Call with @man->cur_mutex held. |
| 563 | */ |
| 564 | static void __vmw_cmdbuf_cur_flush(struct vmw_cmdbuf_man *man) |
| 565 | { |
| 566 | struct vmw_cmdbuf_header *cur = man->cur; |
| 567 | |
| 568 | WARN_ON(!mutex_is_locked(&man->cur_mutex)); |
| 569 | |
| 570 | if (!cur) |
| 571 | return; |
| 572 | |
| 573 | spin_lock_bh(&man->lock); |
| 574 | if (man->cur_pos == 0) { |
| 575 | __vmw_cmdbuf_header_free(cur); |
| 576 | goto out_unlock; |
| 577 | } |
| 578 | |
| 579 | man->cur->cb_header->length = man->cur_pos; |
| 580 | vmw_cmdbuf_ctx_add(man, man->cur, SVGA_CB_CONTEXT_0); |
| 581 | out_unlock: |
| 582 | spin_unlock_bh(&man->lock); |
| 583 | man->cur = NULL; |
| 584 | man->cur_pos = 0; |
| 585 | } |
| 586 | |
| 587 | /** |
| 588 | * vmw_cmdbuf_cur_flush - Flush the current command buffer for small kernel |
| 589 | * command submissions |
| 590 | * |
| 591 | * @man: The command buffer manager. |
| 592 | * @interruptible: Whether to sleep interruptible when sleeping. |
| 593 | * |
| 594 | * Flushes the current command buffer without allocating a new one. A new one |
| 595 | * is automatically allocated when needed. |
| 596 | */ |
| 597 | int vmw_cmdbuf_cur_flush(struct vmw_cmdbuf_man *man, |
| 598 | bool interruptible) |
| 599 | { |
| 600 | int ret = vmw_cmdbuf_cur_lock(man, interruptible); |
| 601 | |
| 602 | if (ret) |
| 603 | return ret; |
| 604 | |
| 605 | __vmw_cmdbuf_cur_flush(man); |
| 606 | vmw_cmdbuf_cur_unlock(man); |
| 607 | |
| 608 | return 0; |
| 609 | } |
| 610 | |
| 611 | /** |
| 612 | * vmw_cmdbuf_idle - Wait for command buffer manager idle. |
| 613 | * |
| 614 | * @man: The command buffer manager. |
| 615 | * @interruptible: Sleep interruptible while waiting. |
| 616 | * @timeout: Time out after this many ticks. |
| 617 | * |
| 618 | * Wait until the command buffer manager has processed all command buffers, |
| 619 | * or until a timeout occurs. If a timeout occurs, the function will return |
| 620 | * -EBUSY. |
| 621 | */ |
| 622 | int vmw_cmdbuf_idle(struct vmw_cmdbuf_man *man, bool interruptible, |
| 623 | unsigned long timeout) |
| 624 | { |
| 625 | int ret; |
| 626 | |
| 627 | ret = vmw_cmdbuf_cur_flush(man, interruptible); |
| 628 | vmw_generic_waiter_add(man->dev_priv, |
| 629 | SVGA_IRQFLAG_COMMAND_BUFFER, |
| 630 | &man->dev_priv->cmdbuf_waiters); |
| 631 | |
| 632 | if (interruptible) { |
| 633 | ret = wait_event_interruptible_timeout |
| 634 | (man->idle_queue, vmw_cmdbuf_man_idle(man, true), |
| 635 | timeout); |
| 636 | } else { |
| 637 | ret = wait_event_timeout |
| 638 | (man->idle_queue, vmw_cmdbuf_man_idle(man, true), |
| 639 | timeout); |
| 640 | } |
| 641 | vmw_generic_waiter_remove(man->dev_priv, |
| 642 | SVGA_IRQFLAG_COMMAND_BUFFER, |
| 643 | &man->dev_priv->cmdbuf_waiters); |
| 644 | if (ret == 0) { |
| 645 | if (!vmw_cmdbuf_man_idle(man, true)) |
| 646 | ret = -EBUSY; |
| 647 | else |
| 648 | ret = 0; |
| 649 | } |
| 650 | if (ret > 0) |
| 651 | ret = 0; |
| 652 | |
| 653 | return ret; |
| 654 | } |
| 655 | |
| 656 | /** |
| 657 | * vmw_cmdbuf_try_alloc - Try to allocate buffer space from the main pool. |
| 658 | * |
| 659 | * @man: The command buffer manager. |
| 660 | * @info: Allocation info. Will hold the size on entry and allocated mm node |
| 661 | * on successful return. |
| 662 | * |
| 663 | * Try to allocate buffer space from the main pool. Returns true if succeeded. |
| 664 | * If a fatal error was hit, the error code is returned in @info->ret. |
| 665 | */ |
| 666 | static bool vmw_cmdbuf_try_alloc(struct vmw_cmdbuf_man *man, |
| 667 | struct vmw_cmdbuf_alloc_info *info) |
| 668 | { |
| 669 | int ret; |
| 670 | |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 671 | if (info->done) |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 672 | return true; |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 673 | |
| 674 | memset(info->node, 0, sizeof(*info->node)); |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 675 | spin_lock_bh(&man->lock); |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 676 | ret = drm_mm_insert_node_generic(&man->mm, info->node, info->page_size, |
| 677 | 0, 0, |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 678 | DRM_MM_SEARCH_DEFAULT, |
| 679 | DRM_MM_CREATE_DEFAULT); |
Thomas Hellstrom | 575f9c8 | 2015-09-29 07:49:56 -0700 | [diff] [blame] | 680 | if (ret) { |
Thomas Hellstrom | 09dc138 | 2015-10-21 21:31:49 +0200 | [diff] [blame] | 681 | vmw_cmdbuf_man_process(man); |
Thomas Hellstrom | 575f9c8 | 2015-09-29 07:49:56 -0700 | [diff] [blame] | 682 | ret = drm_mm_insert_node_generic(&man->mm, info->node, |
| 683 | info->page_size, 0, 0, |
| 684 | DRM_MM_SEARCH_DEFAULT, |
| 685 | DRM_MM_CREATE_DEFAULT); |
| 686 | } |
| 687 | |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 688 | spin_unlock_bh(&man->lock); |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 689 | info->done = !ret; |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 690 | |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 691 | return info->done; |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 692 | } |
| 693 | |
| 694 | /** |
| 695 | * vmw_cmdbuf_alloc_space - Allocate buffer space from the main pool. |
| 696 | * |
| 697 | * @man: The command buffer manager. |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 698 | * @node: Pointer to pre-allocated range-manager node. |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 699 | * @size: The size of the allocation. |
| 700 | * @interruptible: Whether to sleep interruptible while waiting for space. |
| 701 | * |
| 702 | * This function allocates buffer space from the main pool, and if there is |
| 703 | * no space available ATM, it turns on IRQ handling and sleeps waiting for it to |
| 704 | * become available. |
| 705 | */ |
Thomas Hellstrom | b9eb1a6 | 2015-04-02 02:39:45 -0700 | [diff] [blame] | 706 | static int vmw_cmdbuf_alloc_space(struct vmw_cmdbuf_man *man, |
| 707 | struct drm_mm_node *node, |
| 708 | size_t size, |
| 709 | bool interruptible) |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 710 | { |
| 711 | struct vmw_cmdbuf_alloc_info info; |
| 712 | |
| 713 | info.page_size = PAGE_ALIGN(size) >> PAGE_SHIFT; |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 714 | info.node = node; |
| 715 | info.done = false; |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 716 | |
| 717 | /* |
| 718 | * To prevent starvation of large requests, only one allocating call |
| 719 | * at a time waiting for space. |
| 720 | */ |
| 721 | if (interruptible) { |
| 722 | if (mutex_lock_interruptible(&man->space_mutex)) |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 723 | return -ERESTARTSYS; |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 724 | } else { |
| 725 | mutex_lock(&man->space_mutex); |
| 726 | } |
| 727 | |
| 728 | /* Try to allocate space without waiting. */ |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 729 | if (vmw_cmdbuf_try_alloc(man, &info)) |
| 730 | goto out_unlock; |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 731 | |
| 732 | vmw_generic_waiter_add(man->dev_priv, |
| 733 | SVGA_IRQFLAG_COMMAND_BUFFER, |
| 734 | &man->dev_priv->cmdbuf_waiters); |
| 735 | |
| 736 | if (interruptible) { |
| 737 | int ret; |
| 738 | |
| 739 | ret = wait_event_interruptible |
| 740 | (man->alloc_queue, vmw_cmdbuf_try_alloc(man, &info)); |
| 741 | if (ret) { |
| 742 | vmw_generic_waiter_remove |
| 743 | (man->dev_priv, SVGA_IRQFLAG_COMMAND_BUFFER, |
| 744 | &man->dev_priv->cmdbuf_waiters); |
| 745 | mutex_unlock(&man->space_mutex); |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 746 | return ret; |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 747 | } |
| 748 | } else { |
| 749 | wait_event(man->alloc_queue, vmw_cmdbuf_try_alloc(man, &info)); |
| 750 | } |
| 751 | vmw_generic_waiter_remove(man->dev_priv, |
| 752 | SVGA_IRQFLAG_COMMAND_BUFFER, |
| 753 | &man->dev_priv->cmdbuf_waiters); |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 754 | |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 755 | out_unlock: |
| 756 | mutex_unlock(&man->space_mutex); |
| 757 | |
| 758 | return 0; |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 759 | } |
| 760 | |
| 761 | /** |
| 762 | * vmw_cmdbuf_space_pool - Set up a command buffer header with command buffer |
| 763 | * space from the main pool. |
| 764 | * |
| 765 | * @man: The command buffer manager. |
| 766 | * @header: Pointer to the header to set up. |
| 767 | * @size: The requested size of the buffer space. |
| 768 | * @interruptible: Whether to sleep interruptible while waiting for space. |
| 769 | */ |
| 770 | static int vmw_cmdbuf_space_pool(struct vmw_cmdbuf_man *man, |
| 771 | struct vmw_cmdbuf_header *header, |
| 772 | size_t size, |
| 773 | bool interruptible) |
| 774 | { |
| 775 | SVGACBHeader *cb_hdr; |
| 776 | size_t offset; |
| 777 | int ret; |
| 778 | |
| 779 | if (!man->has_pool) |
| 780 | return -ENOMEM; |
| 781 | |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 782 | ret = vmw_cmdbuf_alloc_space(man, &header->node, size, interruptible); |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 783 | |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 784 | if (ret) |
| 785 | return ret; |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 786 | |
| 787 | header->cb_header = dma_pool_alloc(man->headers, GFP_KERNEL, |
| 788 | &header->handle); |
| 789 | if (!header->cb_header) { |
| 790 | ret = -ENOMEM; |
| 791 | goto out_no_cb_header; |
| 792 | } |
| 793 | |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 794 | header->size = header->node.size << PAGE_SHIFT; |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 795 | cb_hdr = header->cb_header; |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 796 | offset = header->node.start << PAGE_SHIFT; |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 797 | header->cmd = man->map + offset; |
| 798 | memset(cb_hdr, 0, sizeof(*cb_hdr)); |
| 799 | if (man->using_mob) { |
| 800 | cb_hdr->flags = SVGA_CB_FLAG_MOB; |
| 801 | cb_hdr->ptr.mob.mobid = man->cmd_space->mem.start; |
| 802 | cb_hdr->ptr.mob.mobOffset = offset; |
| 803 | } else { |
| 804 | cb_hdr->ptr.pa = (u64)man->handle + (u64)offset; |
| 805 | } |
| 806 | |
| 807 | return 0; |
| 808 | |
| 809 | out_no_cb_header: |
| 810 | spin_lock_bh(&man->lock); |
Thomas Hellstrom | 9b59078 | 2015-06-26 04:46:52 -0700 | [diff] [blame] | 811 | drm_mm_remove_node(&header->node); |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 812 | spin_unlock_bh(&man->lock); |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 813 | |
| 814 | return ret; |
| 815 | } |
| 816 | |
| 817 | /** |
| 818 | * vmw_cmdbuf_space_inline - Set up a command buffer header with |
| 819 | * inline command buffer space. |
| 820 | * |
| 821 | * @man: The command buffer manager. |
| 822 | * @header: Pointer to the header to set up. |
| 823 | * @size: The requested size of the buffer space. |
| 824 | */ |
| 825 | static int vmw_cmdbuf_space_inline(struct vmw_cmdbuf_man *man, |
| 826 | struct vmw_cmdbuf_header *header, |
| 827 | int size) |
| 828 | { |
| 829 | struct vmw_cmdbuf_dheader *dheader; |
| 830 | SVGACBHeader *cb_hdr; |
| 831 | |
| 832 | if (WARN_ON_ONCE(size > VMW_CMDBUF_INLINE_SIZE)) |
| 833 | return -ENOMEM; |
| 834 | |
| 835 | dheader = dma_pool_alloc(man->dheaders, GFP_KERNEL, |
| 836 | &header->handle); |
| 837 | if (!dheader) |
| 838 | return -ENOMEM; |
| 839 | |
| 840 | header->inline_space = true; |
| 841 | header->size = VMW_CMDBUF_INLINE_SIZE; |
| 842 | cb_hdr = &dheader->cb_header; |
| 843 | header->cb_header = cb_hdr; |
| 844 | header->cmd = dheader->cmd; |
| 845 | memset(dheader, 0, sizeof(*dheader)); |
| 846 | cb_hdr->status = SVGA_CB_STATUS_NONE; |
| 847 | cb_hdr->flags = SVGA_CB_FLAG_NONE; |
| 848 | cb_hdr->ptr.pa = (u64)header->handle + |
| 849 | (u64)offsetof(struct vmw_cmdbuf_dheader, cmd); |
| 850 | |
| 851 | return 0; |
| 852 | } |
| 853 | |
| 854 | /** |
| 855 | * vmw_cmdbuf_alloc - Allocate a command buffer header complete with |
| 856 | * command buffer space. |
| 857 | * |
| 858 | * @man: The command buffer manager. |
| 859 | * @size: The requested size of the buffer space. |
| 860 | * @interruptible: Whether to sleep interruptible while waiting for space. |
| 861 | * @p_header: points to a header pointer to populate on successful return. |
| 862 | * |
| 863 | * Returns a pointer to command buffer space if successful. Otherwise |
| 864 | * returns an error pointer. The header pointer returned in @p_header should |
| 865 | * be used for upcoming calls to vmw_cmdbuf_reserve() and vmw_cmdbuf_commit(). |
| 866 | */ |
| 867 | void *vmw_cmdbuf_alloc(struct vmw_cmdbuf_man *man, |
| 868 | size_t size, bool interruptible, |
| 869 | struct vmw_cmdbuf_header **p_header) |
| 870 | { |
| 871 | struct vmw_cmdbuf_header *header; |
| 872 | int ret = 0; |
| 873 | |
| 874 | *p_header = NULL; |
| 875 | |
| 876 | header = kzalloc(sizeof(*header), GFP_KERNEL); |
| 877 | if (!header) |
| 878 | return ERR_PTR(-ENOMEM); |
| 879 | |
| 880 | if (size <= VMW_CMDBUF_INLINE_SIZE) |
| 881 | ret = vmw_cmdbuf_space_inline(man, header, size); |
| 882 | else |
| 883 | ret = vmw_cmdbuf_space_pool(man, header, size, interruptible); |
| 884 | |
| 885 | if (ret) { |
| 886 | kfree(header); |
| 887 | return ERR_PTR(ret); |
| 888 | } |
| 889 | |
| 890 | header->man = man; |
| 891 | INIT_LIST_HEAD(&header->list); |
| 892 | header->cb_header->status = SVGA_CB_STATUS_NONE; |
| 893 | *p_header = header; |
| 894 | |
| 895 | return header->cmd; |
| 896 | } |
| 897 | |
| 898 | /** |
| 899 | * vmw_cmdbuf_reserve_cur - Reserve space for commands in the current |
| 900 | * command buffer. |
| 901 | * |
| 902 | * @man: The command buffer manager. |
| 903 | * @size: The requested size of the commands. |
| 904 | * @ctx_id: The context id if any. Otherwise set to SVGA3D_REG_INVALID. |
| 905 | * @interruptible: Whether to sleep interruptible while waiting for space. |
| 906 | * |
| 907 | * Returns a pointer to command buffer space if successful. Otherwise |
| 908 | * returns an error pointer. |
| 909 | */ |
| 910 | static void *vmw_cmdbuf_reserve_cur(struct vmw_cmdbuf_man *man, |
| 911 | size_t size, |
| 912 | int ctx_id, |
| 913 | bool interruptible) |
| 914 | { |
| 915 | struct vmw_cmdbuf_header *cur; |
| 916 | void *ret; |
| 917 | |
| 918 | if (vmw_cmdbuf_cur_lock(man, interruptible)) |
| 919 | return ERR_PTR(-ERESTARTSYS); |
| 920 | |
| 921 | cur = man->cur; |
| 922 | if (cur && (size + man->cur_pos > cur->size || |
Thomas Hellstrom | d80efd5 | 2015-08-10 10:39:35 -0700 | [diff] [blame] | 923 | ((cur->cb_header->flags & SVGA_CB_FLAG_DX_CONTEXT) && |
| 924 | ctx_id != cur->cb_header->dxContext))) |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 925 | __vmw_cmdbuf_cur_flush(man); |
| 926 | |
| 927 | if (!man->cur) { |
| 928 | ret = vmw_cmdbuf_alloc(man, |
| 929 | max_t(size_t, size, man->default_size), |
| 930 | interruptible, &man->cur); |
| 931 | if (IS_ERR(ret)) { |
| 932 | vmw_cmdbuf_cur_unlock(man); |
| 933 | return ret; |
| 934 | } |
| 935 | |
| 936 | cur = man->cur; |
| 937 | } |
| 938 | |
| 939 | if (ctx_id != SVGA3D_INVALID_ID) { |
| 940 | cur->cb_header->flags |= SVGA_CB_FLAG_DX_CONTEXT; |
| 941 | cur->cb_header->dxContext = ctx_id; |
| 942 | } |
| 943 | |
| 944 | cur->reserved = size; |
| 945 | |
| 946 | return (void *) (man->cur->cmd + man->cur_pos); |
| 947 | } |
| 948 | |
| 949 | /** |
| 950 | * vmw_cmdbuf_commit_cur - Commit commands in the current command buffer. |
| 951 | * |
| 952 | * @man: The command buffer manager. |
| 953 | * @size: The size of the commands actually written. |
| 954 | * @flush: Whether to flush the command buffer immediately. |
| 955 | */ |
| 956 | static void vmw_cmdbuf_commit_cur(struct vmw_cmdbuf_man *man, |
| 957 | size_t size, bool flush) |
| 958 | { |
| 959 | struct vmw_cmdbuf_header *cur = man->cur; |
| 960 | |
| 961 | WARN_ON(!mutex_is_locked(&man->cur_mutex)); |
| 962 | |
| 963 | WARN_ON(size > cur->reserved); |
| 964 | man->cur_pos += size; |
| 965 | if (!size) |
| 966 | cur->cb_header->flags &= ~SVGA_CB_FLAG_DX_CONTEXT; |
| 967 | if (flush) |
| 968 | __vmw_cmdbuf_cur_flush(man); |
| 969 | vmw_cmdbuf_cur_unlock(man); |
| 970 | } |
| 971 | |
| 972 | /** |
| 973 | * vmw_cmdbuf_reserve - Reserve space for commands in a command buffer. |
| 974 | * |
| 975 | * @man: The command buffer manager. |
| 976 | * @size: The requested size of the commands. |
| 977 | * @ctx_id: The context id if any. Otherwise set to SVGA3D_REG_INVALID. |
| 978 | * @interruptible: Whether to sleep interruptible while waiting for space. |
| 979 | * @header: Header of the command buffer. NULL if the current command buffer |
| 980 | * should be used. |
| 981 | * |
| 982 | * Returns a pointer to command buffer space if successful. Otherwise |
| 983 | * returns an error pointer. |
| 984 | */ |
| 985 | void *vmw_cmdbuf_reserve(struct vmw_cmdbuf_man *man, size_t size, |
| 986 | int ctx_id, bool interruptible, |
| 987 | struct vmw_cmdbuf_header *header) |
| 988 | { |
| 989 | if (!header) |
| 990 | return vmw_cmdbuf_reserve_cur(man, size, ctx_id, interruptible); |
| 991 | |
| 992 | if (size > header->size) |
| 993 | return ERR_PTR(-EINVAL); |
| 994 | |
| 995 | if (ctx_id != SVGA3D_INVALID_ID) { |
| 996 | header->cb_header->flags |= SVGA_CB_FLAG_DX_CONTEXT; |
| 997 | header->cb_header->dxContext = ctx_id; |
| 998 | } |
| 999 | |
| 1000 | header->reserved = size; |
| 1001 | return header->cmd; |
| 1002 | } |
| 1003 | |
| 1004 | /** |
| 1005 | * vmw_cmdbuf_commit - Commit commands in a command buffer. |
| 1006 | * |
| 1007 | * @man: The command buffer manager. |
| 1008 | * @size: The size of the commands actually written. |
| 1009 | * @header: Header of the command buffer. NULL if the current command buffer |
| 1010 | * should be used. |
| 1011 | * @flush: Whether to flush the command buffer immediately. |
| 1012 | */ |
| 1013 | void vmw_cmdbuf_commit(struct vmw_cmdbuf_man *man, size_t size, |
| 1014 | struct vmw_cmdbuf_header *header, bool flush) |
| 1015 | { |
| 1016 | if (!header) { |
| 1017 | vmw_cmdbuf_commit_cur(man, size, flush); |
| 1018 | return; |
| 1019 | } |
| 1020 | |
| 1021 | (void) vmw_cmdbuf_cur_lock(man, false); |
| 1022 | __vmw_cmdbuf_cur_flush(man); |
| 1023 | WARN_ON(size > header->reserved); |
| 1024 | man->cur = header; |
| 1025 | man->cur_pos = size; |
| 1026 | if (!size) |
| 1027 | header->cb_header->flags &= ~SVGA_CB_FLAG_DX_CONTEXT; |
| 1028 | if (flush) |
| 1029 | __vmw_cmdbuf_cur_flush(man); |
| 1030 | vmw_cmdbuf_cur_unlock(man); |
| 1031 | } |
| 1032 | |
| 1033 | /** |
| 1034 | * vmw_cmdbuf_tasklet_schedule - Schedule the interrupt handler bottom half. |
| 1035 | * |
| 1036 | * @man: The command buffer manager. |
| 1037 | */ |
| 1038 | void vmw_cmdbuf_tasklet_schedule(struct vmw_cmdbuf_man *man) |
| 1039 | { |
| 1040 | if (!man) |
| 1041 | return; |
| 1042 | |
| 1043 | tasklet_schedule(&man->tasklet); |
| 1044 | } |
| 1045 | |
| 1046 | /** |
| 1047 | * vmw_cmdbuf_send_device_command - Send a command through the device context. |
| 1048 | * |
| 1049 | * @man: The command buffer manager. |
| 1050 | * @command: Pointer to the command to send. |
| 1051 | * @size: Size of the command. |
| 1052 | * |
| 1053 | * Synchronously sends a device context command. |
| 1054 | */ |
| 1055 | static int vmw_cmdbuf_send_device_command(struct vmw_cmdbuf_man *man, |
| 1056 | const void *command, |
| 1057 | size_t size) |
| 1058 | { |
| 1059 | struct vmw_cmdbuf_header *header; |
| 1060 | int status; |
| 1061 | void *cmd = vmw_cmdbuf_alloc(man, size, false, &header); |
| 1062 | |
| 1063 | if (IS_ERR(cmd)) |
| 1064 | return PTR_ERR(cmd); |
| 1065 | |
| 1066 | memcpy(cmd, command, size); |
| 1067 | header->cb_header->length = size; |
| 1068 | header->cb_context = SVGA_CB_CONTEXT_DEVICE; |
| 1069 | spin_lock_bh(&man->lock); |
| 1070 | status = vmw_cmdbuf_header_submit(header); |
| 1071 | spin_unlock_bh(&man->lock); |
| 1072 | vmw_cmdbuf_header_free(header); |
| 1073 | |
| 1074 | if (status != SVGA_CB_STATUS_COMPLETED) { |
| 1075 | DRM_ERROR("Device context command failed with status %d\n", |
| 1076 | status); |
| 1077 | return -EINVAL; |
| 1078 | } |
| 1079 | |
| 1080 | return 0; |
| 1081 | } |
| 1082 | |
| 1083 | /** |
| 1084 | * vmw_cmdbuf_startstop - Send a start / stop command through the device |
| 1085 | * context. |
| 1086 | * |
| 1087 | * @man: The command buffer manager. |
| 1088 | * @enable: Whether to enable or disable the context. |
| 1089 | * |
| 1090 | * Synchronously sends a device start / stop context command. |
| 1091 | */ |
| 1092 | static int vmw_cmdbuf_startstop(struct vmw_cmdbuf_man *man, |
| 1093 | bool enable) |
| 1094 | { |
| 1095 | struct { |
| 1096 | uint32 id; |
| 1097 | SVGADCCmdStartStop body; |
| 1098 | } __packed cmd; |
| 1099 | |
| 1100 | cmd.id = SVGA_DC_CMD_START_STOP_CONTEXT; |
| 1101 | cmd.body.enable = (enable) ? 1 : 0; |
| 1102 | cmd.body.context = SVGA_CB_CONTEXT_0; |
| 1103 | |
| 1104 | return vmw_cmdbuf_send_device_command(man, &cmd, sizeof(cmd)); |
| 1105 | } |
| 1106 | |
| 1107 | /** |
| 1108 | * vmw_cmdbuf_set_pool_size - Set command buffer manager sizes |
| 1109 | * |
| 1110 | * @man: The command buffer manager. |
| 1111 | * @size: The size of the main space pool. |
| 1112 | * @default_size: The default size of the command buffer for small kernel |
| 1113 | * submissions. |
| 1114 | * |
| 1115 | * Set the size and allocate the main command buffer space pool, |
| 1116 | * as well as the default size of the command buffer for |
| 1117 | * small kernel submissions. If successful, this enables large command |
| 1118 | * submissions. Note that this function requires that rudimentary command |
| 1119 | * submission is already available and that the MOB memory manager is alive. |
| 1120 | * Returns 0 on success. Negative error code on failure. |
| 1121 | */ |
| 1122 | int vmw_cmdbuf_set_pool_size(struct vmw_cmdbuf_man *man, |
| 1123 | size_t size, size_t default_size) |
| 1124 | { |
| 1125 | struct vmw_private *dev_priv = man->dev_priv; |
| 1126 | bool dummy; |
| 1127 | int ret; |
| 1128 | |
| 1129 | if (man->has_pool) |
| 1130 | return -EINVAL; |
| 1131 | |
| 1132 | /* First, try to allocate a huge chunk of DMA memory */ |
| 1133 | size = PAGE_ALIGN(size); |
| 1134 | man->map = dma_alloc_coherent(&dev_priv->dev->pdev->dev, size, |
| 1135 | &man->handle, GFP_KERNEL); |
| 1136 | if (man->map) { |
| 1137 | man->using_mob = false; |
| 1138 | } else { |
| 1139 | /* |
| 1140 | * DMA memory failed. If we can have command buffers in a |
| 1141 | * MOB, try to use that instead. Note that this will |
| 1142 | * actually call into the already enabled manager, when |
| 1143 | * binding the MOB. |
| 1144 | */ |
Sinclair Yeh | 8ce75f8 | 2015-07-08 21:20:39 -0700 | [diff] [blame] | 1145 | if (!(dev_priv->capabilities & SVGA_CAP_DX)) |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 1146 | return -ENOMEM; |
| 1147 | |
| 1148 | ret = ttm_bo_create(&dev_priv->bdev, size, ttm_bo_type_device, |
| 1149 | &vmw_mob_ne_placement, 0, false, NULL, |
| 1150 | &man->cmd_space); |
| 1151 | if (ret) |
| 1152 | return ret; |
| 1153 | |
| 1154 | man->using_mob = true; |
| 1155 | ret = ttm_bo_kmap(man->cmd_space, 0, size >> PAGE_SHIFT, |
| 1156 | &man->map_obj); |
| 1157 | if (ret) |
| 1158 | goto out_no_map; |
| 1159 | |
| 1160 | man->map = ttm_kmap_obj_virtual(&man->map_obj, &dummy); |
| 1161 | } |
| 1162 | |
| 1163 | man->size = size; |
| 1164 | drm_mm_init(&man->mm, 0, size >> PAGE_SHIFT); |
| 1165 | |
| 1166 | man->has_pool = true; |
Thomas Hellstrom | 09dc138 | 2015-10-21 21:31:49 +0200 | [diff] [blame] | 1167 | |
| 1168 | /* |
| 1169 | * For now, set the default size to VMW_CMDBUF_INLINE_SIZE to |
| 1170 | * prevent deadlocks from happening when vmw_cmdbuf_space_pool() |
| 1171 | * needs to wait for space and we block on further command |
| 1172 | * submissions to be able to free up space. |
| 1173 | */ |
| 1174 | man->default_size = VMW_CMDBUF_INLINE_SIZE; |
Thomas Hellstrom | 3eab3d9 | 2015-06-25 11:57:56 -0700 | [diff] [blame] | 1175 | DRM_INFO("Using command buffers with %s pool.\n", |
| 1176 | (man->using_mob) ? "MOB" : "DMA"); |
| 1177 | |
| 1178 | return 0; |
| 1179 | |
| 1180 | out_no_map: |
| 1181 | if (man->using_mob) |
| 1182 | ttm_bo_unref(&man->cmd_space); |
| 1183 | |
| 1184 | return ret; |
| 1185 | } |
| 1186 | |
| 1187 | /** |
| 1188 | * vmw_cmdbuf_man_create: Create a command buffer manager and enable it for |
| 1189 | * inline command buffer submissions only. |
| 1190 | * |
| 1191 | * @dev_priv: Pointer to device private structure. |
| 1192 | * |
| 1193 | * Returns a pointer to a cummand buffer manager to success or error pointer |
| 1194 | * on failure. The command buffer manager will be enabled for submissions of |
| 1195 | * size VMW_CMDBUF_INLINE_SIZE only. |
| 1196 | */ |
| 1197 | struct vmw_cmdbuf_man *vmw_cmdbuf_man_create(struct vmw_private *dev_priv) |
| 1198 | { |
| 1199 | struct vmw_cmdbuf_man *man; |
| 1200 | struct vmw_cmdbuf_context *ctx; |
| 1201 | int i; |
| 1202 | int ret; |
| 1203 | |
| 1204 | if (!(dev_priv->capabilities & SVGA_CAP_COMMAND_BUFFERS)) |
| 1205 | return ERR_PTR(-ENOSYS); |
| 1206 | |
| 1207 | man = kzalloc(sizeof(*man), GFP_KERNEL); |
| 1208 | if (!man) |
| 1209 | return ERR_PTR(-ENOMEM); |
| 1210 | |
| 1211 | man->headers = dma_pool_create("vmwgfx cmdbuf", |
| 1212 | &dev_priv->dev->pdev->dev, |
| 1213 | sizeof(SVGACBHeader), |
| 1214 | 64, PAGE_SIZE); |
| 1215 | if (!man->headers) { |
| 1216 | ret = -ENOMEM; |
| 1217 | goto out_no_pool; |
| 1218 | } |
| 1219 | |
| 1220 | man->dheaders = dma_pool_create("vmwgfx inline cmdbuf", |
| 1221 | &dev_priv->dev->pdev->dev, |
| 1222 | sizeof(struct vmw_cmdbuf_dheader), |
| 1223 | 64, PAGE_SIZE); |
| 1224 | if (!man->dheaders) { |
| 1225 | ret = -ENOMEM; |
| 1226 | goto out_no_dpool; |
| 1227 | } |
| 1228 | |
| 1229 | for_each_cmdbuf_ctx(man, i, ctx) |
| 1230 | vmw_cmdbuf_ctx_init(ctx); |
| 1231 | |
| 1232 | INIT_LIST_HEAD(&man->error); |
| 1233 | spin_lock_init(&man->lock); |
| 1234 | mutex_init(&man->cur_mutex); |
| 1235 | mutex_init(&man->space_mutex); |
| 1236 | tasklet_init(&man->tasklet, vmw_cmdbuf_man_tasklet, |
| 1237 | (unsigned long) man); |
| 1238 | man->default_size = VMW_CMDBUF_INLINE_SIZE; |
| 1239 | init_waitqueue_head(&man->alloc_queue); |
| 1240 | init_waitqueue_head(&man->idle_queue); |
| 1241 | man->dev_priv = dev_priv; |
| 1242 | man->max_hw_submitted = SVGA_CB_MAX_QUEUED_PER_CONTEXT - 1; |
| 1243 | INIT_WORK(&man->work, &vmw_cmdbuf_work_func); |
| 1244 | vmw_generic_waiter_add(dev_priv, SVGA_IRQFLAG_ERROR, |
| 1245 | &dev_priv->error_waiters); |
| 1246 | ret = vmw_cmdbuf_startstop(man, true); |
| 1247 | if (ret) { |
| 1248 | DRM_ERROR("Failed starting command buffer context 0.\n"); |
| 1249 | vmw_cmdbuf_man_destroy(man); |
| 1250 | return ERR_PTR(ret); |
| 1251 | } |
| 1252 | |
| 1253 | return man; |
| 1254 | |
| 1255 | out_no_dpool: |
| 1256 | dma_pool_destroy(man->headers); |
| 1257 | out_no_pool: |
| 1258 | kfree(man); |
| 1259 | |
| 1260 | return ERR_PTR(ret); |
| 1261 | } |
| 1262 | |
| 1263 | /** |
| 1264 | * vmw_cmdbuf_remove_pool - Take down the main buffer space pool. |
| 1265 | * |
| 1266 | * @man: Pointer to a command buffer manager. |
| 1267 | * |
| 1268 | * This function removes the main buffer space pool, and should be called |
| 1269 | * before MOB memory management is removed. When this function has been called, |
| 1270 | * only small command buffer submissions of size VMW_CMDBUF_INLINE_SIZE or |
| 1271 | * less are allowed, and the default size of the command buffer for small kernel |
| 1272 | * submissions is also set to this size. |
| 1273 | */ |
| 1274 | void vmw_cmdbuf_remove_pool(struct vmw_cmdbuf_man *man) |
| 1275 | { |
| 1276 | if (!man->has_pool) |
| 1277 | return; |
| 1278 | |
| 1279 | man->has_pool = false; |
| 1280 | man->default_size = VMW_CMDBUF_INLINE_SIZE; |
| 1281 | (void) vmw_cmdbuf_idle(man, false, 10*HZ); |
| 1282 | if (man->using_mob) { |
| 1283 | (void) ttm_bo_kunmap(&man->map_obj); |
| 1284 | ttm_bo_unref(&man->cmd_space); |
| 1285 | } else { |
| 1286 | dma_free_coherent(&man->dev_priv->dev->pdev->dev, |
| 1287 | man->size, man->map, man->handle); |
| 1288 | } |
| 1289 | } |
| 1290 | |
| 1291 | /** |
| 1292 | * vmw_cmdbuf_man_destroy - Take down a command buffer manager. |
| 1293 | * |
| 1294 | * @man: Pointer to a command buffer manager. |
| 1295 | * |
| 1296 | * This function idles and then destroys a command buffer manager. |
| 1297 | */ |
| 1298 | void vmw_cmdbuf_man_destroy(struct vmw_cmdbuf_man *man) |
| 1299 | { |
| 1300 | WARN_ON_ONCE(man->has_pool); |
| 1301 | (void) vmw_cmdbuf_idle(man, false, 10*HZ); |
| 1302 | if (vmw_cmdbuf_startstop(man, false)) |
| 1303 | DRM_ERROR("Failed stopping command buffer context 0.\n"); |
| 1304 | |
| 1305 | vmw_generic_waiter_remove(man->dev_priv, SVGA_IRQFLAG_ERROR, |
| 1306 | &man->dev_priv->error_waiters); |
| 1307 | tasklet_kill(&man->tasklet); |
| 1308 | (void) cancel_work_sync(&man->work); |
| 1309 | dma_pool_destroy(man->dheaders); |
| 1310 | dma_pool_destroy(man->headers); |
| 1311 | mutex_destroy(&man->cur_mutex); |
| 1312 | mutex_destroy(&man->space_mutex); |
| 1313 | kfree(man); |
| 1314 | } |