src/gallium/drivers/radeon/radeon_winsys.h

   1 /*
   2  * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
   3  * Copyright 2010 Marek Olšák <maraeo@gmail.com>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * 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 NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  23
  24 #ifndef RADEON_WINSYS_H
  25 #define RADEON_WINSYS_H
  26
  27 /* The public winsys interface header for the radeon driver. */
  28
  29 #include "pipebuffer/pb_buffer.h"
  30
  31 #include "amd/common/amd_family.h"
  32
  33 #define RADEON_FLUSH_ASYNC              (1 << 0)
  34 #define RADEON_FLUSH_END_OF_FRAME       (1 << 1)
  35
  36 /* Tiling flags. */
  37 enum radeon_bo_layout {
  38     RADEON_LAYOUT_LINEAR = 0,
  39     RADEON_LAYOUT_TILED,
  40     RADEON_LAYOUT_SQUARETILED,
  41
  42     RADEON_LAYOUT_UNKNOWN
  43 };
  44
  45 enum radeon_bo_domain { /* bitfield */
  46     RADEON_DOMAIN_GTT  = 2,
  47     RADEON_DOMAIN_VRAM = 4,
  48     RADEON_DOMAIN_VRAM_GTT = RADEON_DOMAIN_VRAM | RADEON_DOMAIN_GTT
  49 };
  50
  51 enum radeon_bo_flag { /* bitfield */
  52     RADEON_FLAG_GTT_WC =        (1 << 0),
  53     RADEON_FLAG_CPU_ACCESS =    (1 << 1),
  54     RADEON_FLAG_NO_CPU_ACCESS = (1 << 2),
  55     RADEON_FLAG_HANDLE =        (1 << 3), /* the buffer most not be suballocated */
  56 };
  57
  58 enum radeon_bo_usage { /* bitfield */
  59     RADEON_USAGE_READ = 2,
  60     RADEON_USAGE_WRITE = 4,
  61     RADEON_USAGE_READWRITE = RADEON_USAGE_READ | RADEON_USAGE_WRITE,
  62
  63     /* The winsys ensures that the CS submission will be scheduled after
  64      * previously flushed CSs referencing this BO in a conflicting way.
  65      */
  66     RADEON_USAGE_SYNCHRONIZED = 8
  67 };
  68
  69 enum ring_type {
  70     RING_GFX = 0,
  71     RING_COMPUTE,
  72     RING_DMA,
  73     RING_UVD,
  74     RING_VCE,
  75     RING_LAST,
  76 };
  77
  78 enum radeon_value_id {
  79     RADEON_REQUESTED_VRAM_MEMORY,
  80     RADEON_REQUESTED_GTT_MEMORY,
  81     RADEON_MAPPED_VRAM,
  82     RADEON_MAPPED_GTT,
  83     RADEON_BUFFER_WAIT_TIME_NS,
  84     RADEON_TIMESTAMP,
  85     RADEON_NUM_CS_FLUSHES,
  86     RADEON_NUM_BYTES_MOVED,
  87     RADEON_NUM_EVICTIONS,
  88     RADEON_VRAM_USAGE,
  89     RADEON_GTT_USAGE,
  90     RADEON_GPU_TEMPERATURE, /* DRM 2.42.0 */
  91     RADEON_CURRENT_SCLK,
  92     RADEON_CURRENT_MCLK,
  93     RADEON_GPU_RESET_COUNTER, /* DRM 2.43.0 */
  94 };
  95
  96 /* Each group of four has the same priority. */
  97 enum radeon_bo_priority {
  98     RADEON_PRIO_FENCE = 0,
  99     RADEON_PRIO_TRACE,
 100     RADEON_PRIO_SO_FILLED_SIZE,
 101     RADEON_PRIO_QUERY,
 102
 103     RADEON_PRIO_IB1 = 4, /* main IB submitted to the kernel */
 104     RADEON_PRIO_IB2, /* IB executed with INDIRECT_BUFFER */
 105     RADEON_PRIO_DRAW_INDIRECT,
 106     RADEON_PRIO_INDEX_BUFFER,
 107
 108     RADEON_PRIO_VCE = 8,
 109     RADEON_PRIO_UVD,
 110     RADEON_PRIO_SDMA_BUFFER,
 111     RADEON_PRIO_SDMA_TEXTURE,
 112
 113     RADEON_PRIO_CP_DMA = 12,
 114
 115     RADEON_PRIO_CONST_BUFFER = 16,
 116     RADEON_PRIO_DESCRIPTORS,
 117     RADEON_PRIO_BORDER_COLORS,
 118
 119     RADEON_PRIO_SAMPLER_BUFFER = 20,
 120     RADEON_PRIO_VERTEX_BUFFER,
 121
 122     RADEON_PRIO_SHADER_RW_BUFFER = 24,
 123     RADEON_PRIO_COMPUTE_GLOBAL,
 124
 125     RADEON_PRIO_SAMPLER_TEXTURE = 28,
 126     RADEON_PRIO_SHADER_RW_IMAGE,
 127
 128     RADEON_PRIO_SAMPLER_TEXTURE_MSAA = 32,
 129
 130     RADEON_PRIO_COLOR_BUFFER = 36,
 131
 132     RADEON_PRIO_DEPTH_BUFFER = 40,
 133
 134     RADEON_PRIO_COLOR_BUFFER_MSAA = 44,
 135
 136     RADEON_PRIO_DEPTH_BUFFER_MSAA = 48,
 137
 138     RADEON_PRIO_CMASK = 52,
 139     RADEON_PRIO_DCC,
 140     RADEON_PRIO_HTILE,
 141     RADEON_PRIO_SHADER_BINARY, /* the hw can't hide instruction cache misses */
 142
 143     RADEON_PRIO_SHADER_RINGS = 56,
 144
 145     RADEON_PRIO_SCRATCH_BUFFER = 60,
 146     /* 63 is the maximum value */
 147 };
 148
 149 struct winsys_handle;
 150 struct radeon_winsys_ctx;
 151
 152 struct radeon_winsys_cs_chunk {
 153     unsigned cdw;  /* Number of used dwords. */
 154     unsigned max_dw; /* Maximum number of dwords. */
 155     uint32_t *buf; /* The base pointer of the chunk. */
 156 };
 157
 158 struct radeon_winsys_cs {
 159     struct radeon_winsys_cs_chunk current;
 160     struct radeon_winsys_cs_chunk *prev;
 161     unsigned                      num_prev; /* Number of previous chunks. */
 162     unsigned                      max_prev; /* Space in array pointed to by prev. */
 163     unsigned                      prev_dw; /* Total number of dwords in previous chunks. */
 164
 165     /* Memory usage of the buffer list. These are always 0 for CE and preamble
 166      * IBs. */
 167     uint64_t                      used_vram;
 168     uint64_t                      used_gart;
 169 };
 170
 171 struct radeon_info {
 172     /* PCI info: domain:bus:dev:func */
 173     uint32_t                    pci_domain;
 174     uint32_t                    pci_bus;
 175     uint32_t                    pci_dev;
 176     uint32_t                    pci_func;
 177
 178     /* Device info. */
 179     uint32_t                    pci_id;
 180     enum radeon_family          family;
 181     enum chip_class             chip_class;
 182     uint32_t                    gart_page_size;
 183     uint64_t                    gart_size;
 184     uint64_t                    vram_size;
 185     uint64_t                    max_alloc_size;
 186     uint32_t                    min_alloc_size;
 187     bool                        has_dedicated_vram;
 188     bool                        has_virtual_memory;
 189     bool                        gfx_ib_pad_with_type2;
 190     bool                        has_sdma;
 191     bool                        has_uvd;
 192     uint32_t                    uvd_fw_version;
 193     uint32_t                    vce_fw_version;
 194     uint32_t                    me_fw_version;
 195     uint32_t                    pfp_fw_version;
 196     uint32_t                    ce_fw_version;
 197     uint32_t                    vce_harvest_config;
 198     uint32_t                    clock_crystal_freq;
 199
 200     /* Kernel info. */
 201     uint32_t                    drm_major; /* version */
 202     uint32_t                    drm_minor;
 203     uint32_t                    drm_patchlevel;
 204     bool                        has_userptr;
 205
 206     /* Shader cores. */
 207     uint32_t                    r600_max_quad_pipes; /* wave size / 16 */
 208     uint32_t                    max_shader_clock;
 209     uint32_t                    num_good_compute_units;
 210     uint32_t                    max_se; /* shader engines */
 211     uint32_t                    max_sh_per_se; /* shader arrays per shader engine */
 212
 213     /* Render backends (color + depth blocks). */
 214     uint32_t                    r300_num_gb_pipes;
 215     uint32_t                    r300_num_z_pipes;
 216     uint32_t                    r600_gb_backend_map; /* R600 harvest config */
 217     bool                        r600_gb_backend_map_valid;
 218     uint32_t                    r600_num_banks;
 219     uint32_t                    num_render_backends;
 220     uint32_t                    num_tile_pipes; /* pipe count from PIPE_CONFIG */
 221     uint32_t                    pipe_interleave_bytes;
 222     uint32_t                    enabled_rb_mask; /* GCN harvest config */
 223
 224     /* Tile modes. */
 225     uint32_t                    si_tile_mode_array[32];
 226     uint32_t                    cik_macrotile_mode_array[16];
 227 };
 228
 229 /* Tiling info for display code, DRI sharing, and other data. */
 230 struct radeon_bo_metadata {
 231     /* Tiling flags describing the texture layout for display code
 232      * and DRI sharing.
 233      */
 234     enum radeon_bo_layout   microtile;
 235     enum radeon_bo_layout   macrotile;
 236     unsigned                pipe_config;
 237     unsigned                bankw;
 238     unsigned                bankh;
 239     unsigned                tile_split;
 240     unsigned                mtilea;
 241     unsigned                num_banks;
 242     unsigned                stride;
 243     bool                    scanout;
 244
 245     /* Additional metadata associated with the buffer, in bytes.
 246      * The maximum size is 64 * 4. This is opaque for the winsys & kernel.
 247      * Supported by amdgpu only.
 248      */
 249     uint32_t                size_metadata;
 250     uint32_t                metadata[64];
 251 };
 252
 253 enum radeon_feature_id {
 254     RADEON_FID_R300_HYPERZ_ACCESS,     /* ZMask + HiZ */
 255     RADEON_FID_R300_CMASK_ACCESS,
 256 };
 257
 258 #define RADEON_SURF_MAX_LEVEL                   32
 259
 260 #define RADEON_SURF_TYPE_MASK                   0xFF
 261 #define RADEON_SURF_TYPE_SHIFT                  0
 262 #define     RADEON_SURF_TYPE_1D                     0
 263 #define     RADEON_SURF_TYPE_2D                     1
 264 #define     RADEON_SURF_TYPE_3D                     2
 265 #define     RADEON_SURF_TYPE_CUBEMAP                3
 266 #define     RADEON_SURF_TYPE_1D_ARRAY               4
 267 #define     RADEON_SURF_TYPE_2D_ARRAY               5
 268 #define RADEON_SURF_MODE_MASK                   0xFF
 269 #define RADEON_SURF_MODE_SHIFT                  8
 270 #define     RADEON_SURF_MODE_LINEAR_ALIGNED         1
 271 #define     RADEON_SURF_MODE_1D                     2
 272 #define     RADEON_SURF_MODE_2D                     3
 273 #define RADEON_SURF_SCANOUT                     (1 << 16)
 274 #define RADEON_SURF_ZBUFFER                     (1 << 17)
 275 #define RADEON_SURF_SBUFFER                     (1 << 18)
 276 #define RADEON_SURF_Z_OR_SBUFFER                (RADEON_SURF_ZBUFFER | RADEON_SURF_SBUFFER)
 277 #define RADEON_SURF_HAS_SBUFFER_MIPTREE         (1 << 19)
 278 #define RADEON_SURF_HAS_TILE_MODE_INDEX         (1 << 20)
 279 #define RADEON_SURF_FMASK                       (1 << 21)
 280 #define RADEON_SURF_DISABLE_DCC                 (1 << 22)
 281 #define RADEON_SURF_TC_COMPATIBLE_HTILE         (1 << 23)
 282 #define RADEON_SURF_IMPORTED                    (1 << 24)
 283
 284 #define RADEON_SURF_GET(v, field)   (((v) >> RADEON_SURF_ ## field ## _SHIFT) & RADEON_SURF_ ## field ## _MASK)
 285 #define RADEON_SURF_SET(v, field)   (((v) & RADEON_SURF_ ## field ## _MASK) << RADEON_SURF_ ## field ## _SHIFT)
 286 #define RADEON_SURF_CLR(v, field)   ((v) & ~(RADEON_SURF_ ## field ## _MASK << RADEON_SURF_ ## field ## _SHIFT))
 287
 288 struct radeon_surf_level {
 289     uint64_t                    offset;
 290     uint64_t                    slice_size;
 291     uint32_t                    npix_x;
 292     uint32_t                    npix_y;
 293     uint32_t                    npix_z;
 294     uint32_t                    nblk_x;
 295     uint32_t                    nblk_y;
 296     uint32_t                    nblk_z;
 297     uint32_t                    pitch_bytes;
 298     uint32_t                    mode;
 299     uint64_t                    dcc_offset;
 300     uint64_t                    dcc_fast_clear_size;
 301     bool                        dcc_enabled;
 302 };
 303
 304 struct radeon_surf {
 305     /* These are inputs to the calculator. */
 306     uint32_t                    npix_x;
 307     uint32_t                    npix_y;
 308     uint32_t                    npix_z;
 309     uint32_t                    blk_w;
 310     uint32_t                    blk_h;
 311     uint32_t                    blk_d;
 312     uint32_t                    array_size;
 313     uint32_t                    last_level;
 314     uint32_t                    bpe;
 315     uint32_t                    nsamples;
 316     uint32_t                    flags;
 317
 318     /* These are return values. Some of them can be set by the caller, but
 319      * they will be treated as hints (e.g. bankw, bankh) and might be
 320      * changed by the calculator.
 321      */
 322     uint64_t                    bo_size;
 323     uint64_t                    bo_alignment;
 324     /* This applies to EG and later. */
 325     uint32_t                    bankw;
 326     uint32_t                    bankh;
 327     uint32_t                    mtilea;
 328     uint32_t                    tile_split;
 329     uint32_t                    stencil_tile_split;
 330     struct radeon_surf_level    level[RADEON_SURF_MAX_LEVEL];
 331     struct radeon_surf_level    stencil_level[RADEON_SURF_MAX_LEVEL];
 332     uint32_t                    tiling_index[RADEON_SURF_MAX_LEVEL];
 333     uint32_t                    stencil_tiling_index[RADEON_SURF_MAX_LEVEL];
 334     uint32_t                    pipe_config;
 335     uint32_t                    num_banks;
 336     uint32_t                    macro_tile_index;
 337     uint32_t                    micro_tile_mode; /* displayable, thin, depth, rotated */
 338
 339     /* Whether the depth miptree or stencil miptree as used by the DB are
 340      * adjusted from their TC compatible form to ensure depth/stencil
 341      * compatibility. If either is true, the corresponding plane cannot be
 342      * sampled from.
 343      */
 344     bool                        depth_adjusted;
 345     bool                        stencil_adjusted;
 346
 347     uint64_t                    dcc_size;
 348     uint64_t                    dcc_alignment;
 349     /* TC-compatible HTILE only. */
 350     uint64_t                    htile_size;
 351     uint64_t                    htile_alignment;
 352 };
 353
 354 struct radeon_bo_list_item {
 355     uint64_t bo_size;
 356     uint64_t vm_address;
 357     uint64_t priority_usage; /* mask of (1 << RADEON_PRIO_*) */
 358 };
 359
 360 struct radeon_winsys {
 361     /**
 362      * The screen object this winsys was created for
 363      */
 364     struct pipe_screen *screen;
 365
 366     /**
 367      * Decrement the winsys reference count.
 368      *
 369      * \param ws  The winsys this function is called for.
 370      * \return    True if the winsys and screen should be destroyed.
 371      */
 372     bool (*unref)(struct radeon_winsys *ws);
 373
 374     /**
 375      * Destroy this winsys.
 376      *
 377      * \param ws        The winsys this function is called from.
 378      */
 379     void (*destroy)(struct radeon_winsys *ws);
 380
 381     /**
 382      * Query an info structure from winsys.
 383      *
 384      * \param ws        The winsys this function is called from.
 385      * \param info      Return structure
 386      */
 387     void (*query_info)(struct radeon_winsys *ws,
 388                        struct radeon_info *info);
 389
 390     /**************************************************************************
 391      * Buffer management. Buffer attributes are mostly fixed over its lifetime.
 392      *
 393      * Remember that gallium gets to choose the interface it needs, and the
 394      * window systems must then implement that interface (rather than the
 395      * other way around...).
 396      *************************************************************************/
 397
 398     /**
 399      * Create a buffer object.
 400      *
 401      * \param ws        The winsys this function is called from.
 402      * \param size      The size to allocate.
 403      * \param alignment An alignment of the buffer in memory.
 404      * \param use_reusable_pool Whether the cache buffer manager should be used.
 405      * \param domain    A bitmask of the RADEON_DOMAIN_* flags.
 406      * \return          The created buffer object.
 407      */
 408     struct pb_buffer *(*buffer_create)(struct radeon_winsys *ws,
 409                                        uint64_t size,
 410                                        unsigned alignment,
 411                                        enum radeon_bo_domain domain,
 412                                        enum radeon_bo_flag flags);
 413
 414     /**
 415      * Map the entire data store of a buffer object into the client's address
 416      * space.
 417      *
 418      * \param buf       A winsys buffer object to map.
 419      * \param cs        A command stream to flush if the buffer is referenced by it.
 420      * \param usage     A bitmask of the PIPE_TRANSFER_* flags.
 421      * \return          The pointer at the beginning of the buffer.
 422      */
 423     void *(*buffer_map)(struct pb_buffer *buf,
 424                         struct radeon_winsys_cs *cs,
 425                         enum pipe_transfer_usage usage);
 426
 427     /**
 428      * Unmap a buffer object from the client's address space.
 429      *
 430      * \param buf       A winsys buffer object to unmap.
 431      */
 432     void (*buffer_unmap)(struct pb_buffer *buf);
 433
 434     /**
 435      * Wait for the buffer and return true if the buffer is not used
 436      * by the device.
 437      *
 438      * The timeout of 0 will only return the status.
 439      * The timeout of PIPE_TIMEOUT_INFINITE will always wait until the buffer
 440      * is idle.
 441      */
 442     bool (*buffer_wait)(struct pb_buffer *buf, uint64_t timeout,
 443                         enum radeon_bo_usage usage);
 444
 445     /**
 446      * Return buffer metadata.
 447      * (tiling info for display code, DRI sharing, and other data)
 448      *
 449      * \param buf       A winsys buffer object to get the flags from.
 450      * \param md        Metadata
 451      */
 452     void (*buffer_get_metadata)(struct pb_buffer *buf,
 453                                 struct radeon_bo_metadata *md);
 454
 455     /**
 456      * Set buffer metadata.
 457      * (tiling info for display code, DRI sharing, and other data)
 458      *
 459      * \param buf       A winsys buffer object to set the flags for.
 460      * \param md        Metadata
 461      */
 462     void (*buffer_set_metadata)(struct pb_buffer *buf,
 463                                 struct radeon_bo_metadata *md);
 464
 465     /**
 466      * Get a winsys buffer from a winsys handle. The internal structure
 467      * of the handle is platform-specific and only a winsys should access it.
 468      *
 469      * \param ws        The winsys this function is called from.
 470      * \param whandle   A winsys handle pointer as was received from a state
 471      *                  tracker.
 472      * \param stride    The returned buffer stride in bytes.
 473      */
 474     struct pb_buffer *(*buffer_from_handle)(struct radeon_winsys *ws,
 475                                             struct winsys_handle *whandle,
 476                                             unsigned *stride, unsigned *offset);
 477
 478     /**
 479      * Get a winsys buffer from a user pointer. The resulting buffer can't
 480      * be exported. Both pointer and size must be page aligned.
 481      *
 482      * \param ws        The winsys this function is called from.
 483      * \param pointer   User pointer to turn into a buffer object.
 484      * \param Size      Size in bytes for the new buffer.
 485      */
 486     struct pb_buffer *(*buffer_from_ptr)(struct radeon_winsys *ws,
 487                                          void *pointer, uint64_t size);
 488
 489     /**
 490      * Whether the buffer was created from a user pointer.
 491      *
 492      * \param buf       A winsys buffer object
 493      * \return          whether \p buf was created via buffer_from_ptr
 494      */
 495     bool (*buffer_is_user_ptr)(struct pb_buffer *buf);
 496
 497     /**
 498      * Get a winsys handle from a winsys buffer. The internal structure
 499      * of the handle is platform-specific and only a winsys should access it.
 500      *
 501      * \param buf       A winsys buffer object to get the handle from.
 502      * \param whandle   A winsys handle pointer.
 503      * \param stride    A stride of the buffer in bytes, for texturing.
 504      * \return          true on success.
 505      */
 506     bool (*buffer_get_handle)(struct pb_buffer *buf,
 507                               unsigned stride, unsigned offset,
 508                               unsigned slice_size,
 509                               struct winsys_handle *whandle);
 510
 511     /**
 512      * Return the virtual address of a buffer.
 513      *
 514      * When virtual memory is not in use, this is the offset relative to the
 515      * relocation base (non-zero for sub-allocated buffers).
 516      *
 517      * \param buf       A winsys buffer object
 518      * \return          virtual address
 519      */
 520     uint64_t (*buffer_get_virtual_address)(struct pb_buffer *buf);
 521
 522     /**
 523      * Return the offset of this buffer relative to the relocation base.
 524      * This is only non-zero for sub-allocated buffers.
 525      *
 526      * This is only supported in the radeon winsys, since amdgpu uses virtual
 527      * addresses in submissions even for the video engines.
 528      *
 529      * \param buf      A winsys buffer object
 530      * \return         the offset for relocations
 531      */
 532     unsigned (*buffer_get_reloc_offset)(struct pb_buffer *buf);
 533
 534     /**
 535      * Query the initial placement of the buffer from the kernel driver.
 536      */
 537     enum radeon_bo_domain (*buffer_get_initial_domain)(struct pb_buffer *buf);
 538
 539     /**************************************************************************
 540      * Command submission.
 541      *
 542      * Each pipe context should create its own command stream and submit
 543      * commands independently of other contexts.
 544      *************************************************************************/
 545
 546     /**
 547      * Create a command submission context.
 548      * Various command streams can be submitted to the same context.
 549      */
 550     struct radeon_winsys_ctx *(*ctx_create)(struct radeon_winsys *ws);
 551
 552     /**
 553      * Destroy a context.
 554      */
 555     void (*ctx_destroy)(struct radeon_winsys_ctx *ctx);
 556
 557     /**
 558      * Query a GPU reset status.
 559      */
 560     enum pipe_reset_status (*ctx_query_reset_status)(struct radeon_winsys_ctx *ctx);
 561
 562     /**
 563      * Create a command stream.
 564      *
 565      * \param ctx       The submission context
 566      * \param ring_type The ring type (GFX, DMA, UVD)
 567      * \param flush     Flush callback function associated with the command stream.
 568      * \param user      User pointer that will be passed to the flush callback.
 569      */
 570     struct radeon_winsys_cs *(*cs_create)(struct radeon_winsys_ctx *ctx,
 571                                           enum ring_type ring_type,
 572                                           void (*flush)(void *ctx, unsigned flags,
 573                                                         struct pipe_fence_handle **fence),
 574                                           void *flush_ctx);
 575
 576     /**
 577      * Add a constant engine IB to a graphics CS. This makes the graphics CS
 578      * from "cs_create" a group of two IBs that share a buffer list and are
 579      * flushed together.
 580      *
 581      * The returned constant CS is only a stream for writing packets to the new
 582      * IB. Calling other winsys functions with it is not allowed, not even
 583      * "cs_destroy".
 584      *
 585      * In order to add buffers and check memory usage, use the graphics CS.
 586      * In order to flush it, use the graphics CS, which will flush both IBs.
 587      * Destroying the graphics CS will destroy both of them.
 588      *
 589      * \param cs  The graphics CS from "cs_create" that will hold the buffer
 590      *            list and will be used for flushing.
 591      */
 592     struct radeon_winsys_cs *(*cs_add_const_ib)(struct radeon_winsys_cs *cs);
 593
 594      /**
 595      * Add a constant engine preamble IB to a graphics CS. This add an extra IB
 596      * in similar manner to cs_add_const_ib. This should always be called after
 597      * cs_add_const_ib.
 598      *
 599      * The returned IB is a constant engine IB that only gets flushed if the
 600      * context changed.
 601      *
 602      * \param cs  The graphics CS from "cs_create" that will hold the buffer
 603      *            list and will be used for flushing.
 604      */
 605     struct radeon_winsys_cs *(*cs_add_const_preamble_ib)(struct radeon_winsys_cs *cs);
 606     /**
 607      * Destroy a command stream.
 608      *
 609      * \param cs        A command stream to destroy.
 610      */
 611     void (*cs_destroy)(struct radeon_winsys_cs *cs);
 612
 613     /**
 614      * Add a buffer. Each buffer used by a CS must be added using this function.
 615      *
 616      * \param cs      Command stream
 617      * \param buf     Buffer
 618      * \param usage   Whether the buffer is used for read and/or write.
 619      * \param domain  Bitmask of the RADEON_DOMAIN_* flags.
 620      * \param priority  A higher number means a greater chance of being
 621      *                  placed in the requested domain. 15 is the maximum.
 622      * \return Buffer index.
 623      */
 624     unsigned (*cs_add_buffer)(struct radeon_winsys_cs *cs,
 625                              struct pb_buffer *buf,
 626                              enum radeon_bo_usage usage,
 627                              enum radeon_bo_domain domain,
 628                              enum radeon_bo_priority priority);
 629
 630     /**
 631      * Return the index of an already-added buffer.
 632      *
 633      * Not supported on amdgpu. Drivers with GPUVM should not care about
 634      * buffer indices.
 635      *
 636      * \param cs        Command stream
 637      * \param buf       Buffer
 638      * \return          The buffer index, or -1 if the buffer has not been added.
 639      */
 640     int (*cs_lookup_buffer)(struct radeon_winsys_cs *cs,
 641                             struct pb_buffer *buf);
 642
 643     /**
 644      * Return true if there is enough memory in VRAM and GTT for the buffers
 645      * added so far. If the validation fails, all buffers which have
 646      * been added since the last call of cs_validate will be removed and
 647      * the CS will be flushed (provided there are still any buffers).
 648      *
 649      * \param cs        A command stream to validate.
 650      */
 651     bool (*cs_validate)(struct radeon_winsys_cs *cs);
 652
 653     /**
 654      * Check whether the given number of dwords is available in the IB.
 655      * Optionally chain a new chunk of the IB if necessary and supported.
 656      *
 657      * \param cs        A command stream.
 658      * \param dw        Number of CS dwords requested by the caller.
 659      */
 660     bool (*cs_check_space)(struct radeon_winsys_cs *cs, unsigned dw);
 661
 662     /**
 663      * Return the buffer list.
 664      *
 665      * This is the buffer list as passed to the kernel, i.e. it only contains
 666      * the parent buffers of sub-allocated buffers.
 667      *
 668      * \param cs    Command stream
 669      * \param list  Returned buffer list. Set to NULL to query the count only.
 670      * \return      The buffer count.
 671      */
 672     unsigned (*cs_get_buffer_list)(struct radeon_winsys_cs *cs,
 673                                    struct radeon_bo_list_item *list);
 674
 675     /**
 676      * Flush a command stream.
 677      *
 678      * \param cs          A command stream to flush.
 679      * \param flags,      RADEON_FLUSH_ASYNC or 0.
 680      * \param fence       Pointer to a fence. If non-NULL, a fence is inserted
 681      *                    after the CS and is returned through this parameter.
 682      * \return Negative POSIX error code or 0 for success.
 683      *         Asynchronous submissions never return an error.
 684      */
 685     int (*cs_flush)(struct radeon_winsys_cs *cs,
 686                     unsigned flags,
 687                     struct pipe_fence_handle **fence);
 688
 689     /**
 690      * Create a fence before the CS is flushed.
 691      * The user must flush manually to complete the initializaton of the fence.
 692      * The fence must not be used before the flush.
 693      */
 694     struct pipe_fence_handle *(*cs_get_next_fence)(struct radeon_winsys_cs *cs);
 695
 696     /**
 697      * Return true if a buffer is referenced by a command stream.
 698      *
 699      * \param cs        A command stream.
 700      * \param buf       A winsys buffer.
 701      */
 702     bool (*cs_is_buffer_referenced)(struct radeon_winsys_cs *cs,
 703                                     struct pb_buffer *buf,
 704                                     enum radeon_bo_usage usage);
 705
 706     /**
 707      * Request access to a feature for a command stream.
 708      *
 709      * \param cs        A command stream.
 710      * \param fid       Feature ID, one of RADEON_FID_*
 711      * \param enable    Whether to enable or disable the feature.
 712      */
 713     bool (*cs_request_feature)(struct radeon_winsys_cs *cs,
 714                                enum radeon_feature_id fid,
 715                                bool enable);
 716      /**
 717       * Make sure all asynchronous flush of the cs have completed
 718       *
 719       * \param cs        A command stream.
 720       */
 721     void (*cs_sync_flush)(struct radeon_winsys_cs *cs);
 722
 723     /**
 724      * Wait for the fence and return true if the fence has been signalled.
 725      * The timeout of 0 will only return the status.
 726      * The timeout of PIPE_TIMEOUT_INFINITE will always wait until the fence
 727      * is signalled.
 728      */
 729     bool (*fence_wait)(struct radeon_winsys *ws,
 730                        struct pipe_fence_handle *fence,
 731                        uint64_t timeout);
 732
 733     /**
 734      * Reference counting for fences.
 735      */
 736     void (*fence_reference)(struct pipe_fence_handle **dst,
 737                             struct pipe_fence_handle *src);
 738
 739     /**
 740      * Initialize surface
 741      *
 742      * \param ws        The winsys this function is called from.
 743      * \param surf      Surface structure ptr
 744      */
 745     int (*surface_init)(struct radeon_winsys *ws,
 746                         struct radeon_surf *surf);
 747
 748     uint64_t (*query_value)(struct radeon_winsys *ws,
 749                             enum radeon_value_id value);
 750
 751     bool (*read_registers)(struct radeon_winsys *ws, unsigned reg_offset,
 752                            unsigned num_registers, uint32_t *out);
 753 };
 754
 755 static inline bool radeon_emitted(struct radeon_winsys_cs *cs, unsigned num_dw)
 756 {
 757     return cs && (cs->prev_dw + cs->current.cdw > num_dw);
 758 }
 759
 760 static inline void radeon_emit(struct radeon_winsys_cs *cs, uint32_t value)
 761 {
 762     cs->current.buf[cs->current.cdw++] = value;
 763 }
 764
 765 static inline void radeon_emit_array(struct radeon_winsys_cs *cs,
 766                                      const uint32_t *values, unsigned count)
 767 {
 768     memcpy(cs->current.buf + cs->current.cdw, values, count * 4);
 769     cs->current.cdw += count;
 770 }
 771
 772 #endif