drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h

   1 /*
   2  * Copyright 2016 Advanced Micro Devices, 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  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Christian König
  23  */
  24 #ifndef __AMDGPU_RING_H__
  25 #define __AMDGPU_RING_H__
  26
  27 #include <drm/amdgpu_drm.h>
  28 #include <drm/gpu_scheduler.h>
  29 #include <drm/drm_print.h>
  30
  31 /* max number of rings */
  32 #define AMDGPU_MAX_RINGS                28
  33 #define AMDGPU_MAX_HWIP_RINGS           8
  34 #define AMDGPU_MAX_GFX_RINGS            2
  35 #define AMDGPU_MAX_COMPUTE_RINGS        8
  36 #define AMDGPU_MAX_VCE_RINGS            3
  37 #define AMDGPU_MAX_UVD_ENC_RINGS        2
  38
  39 #define AMDGPU_RING_PRIO_DEFAULT        1
  40 #define AMDGPU_RING_PRIO_MAX            AMDGPU_GFX_PIPE_PRIO_MAX
  41
  42 /* some special values for the owner field */
  43 #define AMDGPU_FENCE_OWNER_UNDEFINED    ((void *)0ul)
  44 #define AMDGPU_FENCE_OWNER_VM           ((void *)1ul)
  45 #define AMDGPU_FENCE_OWNER_KFD          ((void *)2ul)
  46
  47 #define AMDGPU_FENCE_FLAG_64BIT         (1 << 0)
  48 #define AMDGPU_FENCE_FLAG_INT           (1 << 1)
  49 #define AMDGPU_FENCE_FLAG_TC_WB_ONLY    (1 << 2)
  50
  51 /* fence flag bit to indicate the face is embedded in job*/
  52 #define AMDGPU_FENCE_FLAG_EMBED_IN_JOB_BIT              (DMA_FENCE_FLAG_USER_BITS + 1)
  53
  54 #define to_amdgpu_ring(s) container_of((s), struct amdgpu_ring, sched)
  55
  56 #define AMDGPU_IB_POOL_SIZE     (1024 * 1024)
  57
  58 enum amdgpu_ring_type {
  59         AMDGPU_RING_TYPE_GFX            = AMDGPU_HW_IP_GFX,
  60         AMDGPU_RING_TYPE_COMPUTE        = AMDGPU_HW_IP_COMPUTE,
  61         AMDGPU_RING_TYPE_SDMA           = AMDGPU_HW_IP_DMA,
  62         AMDGPU_RING_TYPE_UVD            = AMDGPU_HW_IP_UVD,
  63         AMDGPU_RING_TYPE_VCE            = AMDGPU_HW_IP_VCE,
  64         AMDGPU_RING_TYPE_UVD_ENC        = AMDGPU_HW_IP_UVD_ENC,
  65         AMDGPU_RING_TYPE_VCN_DEC        = AMDGPU_HW_IP_VCN_DEC,
  66         AMDGPU_RING_TYPE_VCN_ENC        = AMDGPU_HW_IP_VCN_ENC,
  67         AMDGPU_RING_TYPE_VCN_JPEG       = AMDGPU_HW_IP_VCN_JPEG,
  68         AMDGPU_RING_TYPE_KIQ,
  69         AMDGPU_RING_TYPE_MES
  70 };
  71
  72 enum amdgpu_ib_pool_type {
  73         /* Normal submissions to the top of the pipeline. */
  74         AMDGPU_IB_POOL_DELAYED,
  75         /* Immediate submissions to the bottom of the pipeline. */
  76         AMDGPU_IB_POOL_IMMEDIATE,
  77         /* Direct submission to the ring buffer during init and reset. */
  78         AMDGPU_IB_POOL_DIRECT,
  79
  80         AMDGPU_IB_POOL_MAX
  81 };
  82
  83 struct amdgpu_device;
  84 struct amdgpu_ring;
  85 struct amdgpu_ib;
  86 struct amdgpu_cs_parser;
  87 struct amdgpu_job;
  88
  89 struct amdgpu_sched {
  90         u32                             num_scheds;
  91         struct drm_gpu_scheduler        *sched[AMDGPU_MAX_HWIP_RINGS];
  92 };
  93
  94 /*
  95  * Fences.
  96  */
  97 struct amdgpu_fence_driver {
  98         uint64_t                        gpu_addr;
  99         volatile uint32_t               *cpu_addr;
 100         /* sync_seq is protected by ring emission lock */
 101         uint32_t                        sync_seq;
 102         atomic_t                        last_seq;
 103         bool                            initialized;
 104         struct amdgpu_irq_src           *irq_src;
 105         unsigned                        irq_type;
 106         struct timer_list               fallback_timer;
 107         unsigned                        num_fences_mask;
 108         spinlock_t                      lock;
 109         struct dma_fence                **fences;
 110 };
 111
 112 void amdgpu_fence_driver_force_completion(struct amdgpu_ring *ring);
 113
 114 int amdgpu_fence_driver_init_ring(struct amdgpu_ring *ring,
 115                                   unsigned num_hw_submission,
 116                                   atomic_t *sched_score);
 117 int amdgpu_fence_driver_start_ring(struct amdgpu_ring *ring,
 118                                    struct amdgpu_irq_src *irq_src,
 119                                    unsigned irq_type);
 120 void amdgpu_fence_driver_hw_init(struct amdgpu_device *adev);
 121 void amdgpu_fence_driver_hw_fini(struct amdgpu_device *adev);
 122 int amdgpu_fence_driver_sw_init(struct amdgpu_device *adev);
 123 void amdgpu_fence_driver_sw_fini(struct amdgpu_device *adev);
 124 int amdgpu_fence_emit(struct amdgpu_ring *ring, struct dma_fence **fence, struct amdgpu_job *job,
 125                       unsigned flags);
 126 int amdgpu_fence_emit_polling(struct amdgpu_ring *ring, uint32_t *s,
 127                               uint32_t timeout);
 128 bool amdgpu_fence_process(struct amdgpu_ring *ring);
 129 int amdgpu_fence_wait_empty(struct amdgpu_ring *ring);
 130 signed long amdgpu_fence_wait_polling(struct amdgpu_ring *ring,
 131                                       uint32_t wait_seq,
 132                                       signed long timeout);
 133 unsigned amdgpu_fence_count_emitted(struct amdgpu_ring *ring);
 134
 135 /*
 136  * Rings.
 137  */
 138
 139 /* provided by hw blocks that expose a ring buffer for commands */
 140 struct amdgpu_ring_funcs {
 141         enum amdgpu_ring_type   type;
 142         uint32_t                align_mask;
 143         u32                     nop;
 144         bool                    support_64bit_ptrs;
 145         bool                    no_user_fence;
 146         unsigned                vmhub;
 147         unsigned                extra_dw;
 148
 149         /* ring read/write ptr handling */
 150         u64 (*get_rptr)(struct amdgpu_ring *ring);
 151         u64 (*get_wptr)(struct amdgpu_ring *ring);
 152         void (*set_wptr)(struct amdgpu_ring *ring);
 153         /* validating and patching of IBs */
 154         int (*parse_cs)(struct amdgpu_cs_parser *p, uint32_t ib_idx);
 155         int (*patch_cs_in_place)(struct amdgpu_cs_parser *p, uint32_t ib_idx);
 156         /* constants to calculate how many DW are needed for an emit */
 157         unsigned emit_frame_size;
 158         unsigned emit_ib_size;
 159         /* command emit functions */
 160         void (*emit_ib)(struct amdgpu_ring *ring,
 161                         struct amdgpu_job *job,
 162                         struct amdgpu_ib *ib,
 163                         uint32_t flags);
 164         void (*emit_fence)(struct amdgpu_ring *ring, uint64_t addr,
 165                            uint64_t seq, unsigned flags);
 166         void (*emit_pipeline_sync)(struct amdgpu_ring *ring);
 167         void (*emit_vm_flush)(struct amdgpu_ring *ring, unsigned vmid,
 168                               uint64_t pd_addr);
 169         void (*emit_hdp_flush)(struct amdgpu_ring *ring);
 170         void (*emit_gds_switch)(struct amdgpu_ring *ring, uint32_t vmid,
 171                                 uint32_t gds_base, uint32_t gds_size,
 172                                 uint32_t gws_base, uint32_t gws_size,
 173                                 uint32_t oa_base, uint32_t oa_size);
 174         /* testing functions */
 175         int (*test_ring)(struct amdgpu_ring *ring);
 176         int (*test_ib)(struct amdgpu_ring *ring, long timeout);
 177         /* insert NOP packets */
 178         void (*insert_nop)(struct amdgpu_ring *ring, uint32_t count);
 179         void (*insert_start)(struct amdgpu_ring *ring);
 180         void (*insert_end)(struct amdgpu_ring *ring);
 181         /* pad the indirect buffer to the necessary number of dw */
 182         void (*pad_ib)(struct amdgpu_ring *ring, struct amdgpu_ib *ib);
 183         unsigned (*init_cond_exec)(struct amdgpu_ring *ring);
 184         void (*patch_cond_exec)(struct amdgpu_ring *ring, unsigned offset);
 185         /* note usage for clock and power gating */
 186         void (*begin_use)(struct amdgpu_ring *ring);
 187         void (*end_use)(struct amdgpu_ring *ring);
 188         void (*emit_switch_buffer) (struct amdgpu_ring *ring);
 189         void (*emit_cntxcntl) (struct amdgpu_ring *ring, uint32_t flags);
 190         void (*emit_rreg)(struct amdgpu_ring *ring, uint32_t reg,
 191                           uint32_t reg_val_offs);
 192         void (*emit_wreg)(struct amdgpu_ring *ring, uint32_t reg, uint32_t val);
 193         void (*emit_reg_wait)(struct amdgpu_ring *ring, uint32_t reg,
 194                               uint32_t val, uint32_t mask);
 195         void (*emit_reg_write_reg_wait)(struct amdgpu_ring *ring,
 196                                         uint32_t reg0, uint32_t reg1,
 197                                         uint32_t ref, uint32_t mask);
 198         void (*emit_frame_cntl)(struct amdgpu_ring *ring, bool start,
 199                                 bool secure);
 200         /* Try to soft recover the ring to make the fence signal */
 201         void (*soft_recovery)(struct amdgpu_ring *ring, unsigned vmid);
 202         int (*preempt_ib)(struct amdgpu_ring *ring);
 203         void (*emit_mem_sync)(struct amdgpu_ring *ring);
 204         void (*emit_wave_limit)(struct amdgpu_ring *ring, bool enable);
 205 };
 206
 207 struct amdgpu_ring {
 208         struct amdgpu_device            *adev;
 209         const struct amdgpu_ring_funcs  *funcs;
 210         struct amdgpu_fence_driver      fence_drv;
 211         struct drm_gpu_scheduler        sched;
 212
 213         struct amdgpu_bo        *ring_obj;
 214         volatile uint32_t       *ring;
 215         unsigned                rptr_offs;
 216         u64                     wptr;
 217         u64                     wptr_old;
 218         unsigned                ring_size;
 219         unsigned                max_dw;
 220         int                     count_dw;
 221         uint64_t                gpu_addr;
 222         uint64_t                ptr_mask;
 223         uint32_t                buf_mask;
 224         u32                     idx;
 225         u32                     me;
 226         u32                     pipe;
 227         u32                     queue;
 228         struct amdgpu_bo        *mqd_obj;
 229         uint64_t                mqd_gpu_addr;
 230         void                    *mqd_ptr;
 231         uint64_t                eop_gpu_addr;
 232         u32                     doorbell_index;
 233         bool                    use_doorbell;
 234         bool                    use_pollmem;
 235         unsigned                wptr_offs;
 236         unsigned                fence_offs;
 237         uint64_t                current_ctx;
 238         char                    name[16];
 239         u32                     trail_seq;
 240         unsigned                trail_fence_offs;
 241         u64                     trail_fence_gpu_addr;
 242         volatile u32            *trail_fence_cpu_addr;
 243         unsigned                cond_exe_offs;
 244         u64                     cond_exe_gpu_addr;
 245         volatile u32            *cond_exe_cpu_addr;
 246         unsigned                vm_inv_eng;
 247         struct dma_fence        *vmid_wait;
 248         bool                    has_compute_vm_bug;
 249         bool                    no_scheduler;
 250         int                     hw_prio;
 251
 252 #if defined(CONFIG_DEBUG_FS)
 253         struct dentry *ent;
 254 #endif
 255 };
 256
 257 #define amdgpu_ring_parse_cs(r, p, ib) ((r)->funcs->parse_cs((p), (ib)))
 258 #define amdgpu_ring_patch_cs_in_place(r, p, ib) ((r)->funcs->patch_cs_in_place((p), (ib)))
 259 #define amdgpu_ring_test_ring(r) (r)->funcs->test_ring((r))
 260 #define amdgpu_ring_test_ib(r, t) (r)->funcs->test_ib((r), (t))
 261 #define amdgpu_ring_get_rptr(r) (r)->funcs->get_rptr((r))
 262 #define amdgpu_ring_get_wptr(r) (r)->funcs->get_wptr((r))
 263 #define amdgpu_ring_set_wptr(r) (r)->funcs->set_wptr((r))
 264 #define amdgpu_ring_emit_ib(r, job, ib, flags) ((r)->funcs->emit_ib((r), (job), (ib), (flags)))
 265 #define amdgpu_ring_emit_pipeline_sync(r) (r)->funcs->emit_pipeline_sync((r))
 266 #define amdgpu_ring_emit_vm_flush(r, vmid, addr) (r)->funcs->emit_vm_flush((r), (vmid), (addr))
 267 #define amdgpu_ring_emit_fence(r, addr, seq, flags) (r)->funcs->emit_fence((r), (addr), (seq), (flags))
 268 #define amdgpu_ring_emit_gds_switch(r, v, db, ds, wb, ws, ab, as) (r)->funcs->emit_gds_switch((r), (v), (db), (ds), (wb), (ws), (ab), (as))
 269 #define amdgpu_ring_emit_hdp_flush(r) (r)->funcs->emit_hdp_flush((r))
 270 #define amdgpu_ring_emit_switch_buffer(r) (r)->funcs->emit_switch_buffer((r))
 271 #define amdgpu_ring_emit_cntxcntl(r, d) (r)->funcs->emit_cntxcntl((r), (d))
 272 #define amdgpu_ring_emit_rreg(r, d, o) (r)->funcs->emit_rreg((r), (d), (o))
 273 #define amdgpu_ring_emit_wreg(r, d, v) (r)->funcs->emit_wreg((r), (d), (v))
 274 #define amdgpu_ring_emit_reg_wait(r, d, v, m) (r)->funcs->emit_reg_wait((r), (d), (v), (m))
 275 #define amdgpu_ring_emit_reg_write_reg_wait(r, d0, d1, v, m) (r)->funcs->emit_reg_write_reg_wait((r), (d0), (d1), (v), (m))
 276 #define amdgpu_ring_emit_frame_cntl(r, b, s) (r)->funcs->emit_frame_cntl((r), (b), (s))
 277 #define amdgpu_ring_pad_ib(r, ib) ((r)->funcs->pad_ib((r), (ib)))
 278 #define amdgpu_ring_init_cond_exec(r) (r)->funcs->init_cond_exec((r))
 279 #define amdgpu_ring_patch_cond_exec(r,o) (r)->funcs->patch_cond_exec((r),(o))
 280 #define amdgpu_ring_preempt_ib(r) (r)->funcs->preempt_ib(r)
 281
 282 int amdgpu_ring_alloc(struct amdgpu_ring *ring, unsigned ndw);
 283 void amdgpu_ring_insert_nop(struct amdgpu_ring *ring, uint32_t count);
 284 void amdgpu_ring_generic_pad_ib(struct amdgpu_ring *ring, struct amdgpu_ib *ib);
 285 void amdgpu_ring_commit(struct amdgpu_ring *ring);
 286 void amdgpu_ring_undo(struct amdgpu_ring *ring);
 287 int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring,
 288                      unsigned int ring_size, struct amdgpu_irq_src *irq_src,
 289                      unsigned int irq_type, unsigned int prio,
 290                      atomic_t *sched_score);
 291 void amdgpu_ring_fini(struct amdgpu_ring *ring);
 292 void amdgpu_ring_emit_reg_write_reg_wait_helper(struct amdgpu_ring *ring,
 293                                                 uint32_t reg0, uint32_t val0,
 294                                                 uint32_t reg1, uint32_t val1);
 295 bool amdgpu_ring_soft_recovery(struct amdgpu_ring *ring, unsigned int vmid,
 296                                struct dma_fence *fence);
 297
 298 static inline void amdgpu_ring_set_preempt_cond_exec(struct amdgpu_ring *ring,
 299                                                         bool cond_exec)
 300 {
 301         *ring->cond_exe_cpu_addr = cond_exec;
 302 }
 303
 304 static inline void amdgpu_ring_clear_ring(struct amdgpu_ring *ring)
 305 {
 306         int i = 0;
 307         while (i <= ring->buf_mask)
 308                 ring->ring[i++] = ring->funcs->nop;
 309
 310 }
 311
 312 static inline void amdgpu_ring_write(struct amdgpu_ring *ring, uint32_t v)
 313 {
 314         if (ring->count_dw <= 0)
 315                 DRM_ERROR("amdgpu: writing more dwords to the ring than expected!\n");
 316         ring->ring[ring->wptr++ & ring->buf_mask] = v;
 317         ring->wptr &= ring->ptr_mask;
 318         ring->count_dw--;
 319 }
 320
 321 static inline void amdgpu_ring_write_multiple(struct amdgpu_ring *ring,
 322                                               void *src, int count_dw)
 323 {
 324         unsigned occupied, chunk1, chunk2;
 325         void *dst;
 326
 327         if (unlikely(ring->count_dw < count_dw))
 328                 DRM_ERROR("amdgpu: writing more dwords to the ring than expected!\n");
 329
 330         occupied = ring->wptr & ring->buf_mask;
 331         dst = (void *)&ring->ring[occupied];
 332         chunk1 = ring->buf_mask + 1 - occupied;
 333         chunk1 = (chunk1 >= count_dw) ? count_dw: chunk1;
 334         chunk2 = count_dw - chunk1;
 335         chunk1 <<= 2;
 336         chunk2 <<= 2;
 337
 338         if (chunk1)
 339                 memcpy(dst, src, chunk1);
 340
 341         if (chunk2) {
 342                 src += chunk1;
 343                 dst = (void *)ring->ring;
 344                 memcpy(dst, src, chunk2);
 345         }
 346
 347         ring->wptr += count_dw;
 348         ring->wptr &= ring->ptr_mask;
 349         ring->count_dw -= count_dw;
 350 }
 351
 352 int amdgpu_ring_test_helper(struct amdgpu_ring *ring);
 353
 354 int amdgpu_debugfs_ring_init(struct amdgpu_device *adev,
 355                              struct amdgpu_ring *ring);
 356 void amdgpu_debugfs_ring_fini(struct amdgpu_ring *ring);
 357
 358 #endif