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 "gpu_scheduler.h"
  28
  29 /* max number of rings */
  30 #define AMDGPU_MAX_RINGS                18
  31 #define AMDGPU_MAX_GFX_RINGS            1
  32 #define AMDGPU_MAX_COMPUTE_RINGS        8
  33 #define AMDGPU_MAX_VCE_RINGS            3
  34 #define AMDGPU_MAX_UVD_ENC_RINGS        2
  35
  36 /* some special values for the owner field */
  37 #define AMDGPU_FENCE_OWNER_UNDEFINED    ((void*)0ul)
  38 #define AMDGPU_FENCE_OWNER_VM           ((void*)1ul)
  39
  40 #define AMDGPU_FENCE_FLAG_64BIT         (1 << 0)
  41 #define AMDGPU_FENCE_FLAG_INT           (1 << 1)
  42
  43 enum amdgpu_ring_type {
  44         AMDGPU_RING_TYPE_GFX,
  45         AMDGPU_RING_TYPE_COMPUTE,
  46         AMDGPU_RING_TYPE_SDMA,
  47         AMDGPU_RING_TYPE_UVD,
  48         AMDGPU_RING_TYPE_VCE,
  49         AMDGPU_RING_TYPE_KIQ,
  50         AMDGPU_RING_TYPE_UVD_ENC,
  51         AMDGPU_RING_TYPE_VCN_DEC,
  52         AMDGPU_RING_TYPE_VCN_ENC
  53 };
  54
  55 struct amdgpu_device;
  56 struct amdgpu_ring;
  57 struct amdgpu_ib;
  58 struct amdgpu_cs_parser;
  59
  60 /*
  61  * Fences.
  62  */
  63 struct amdgpu_fence_driver {
  64         uint64_t                        gpu_addr;
  65         volatile uint32_t               *cpu_addr;
  66         /* sync_seq is protected by ring emission lock */
  67         uint32_t                        sync_seq;
  68         atomic_t                        last_seq;
  69         bool                            initialized;
  70         struct amdgpu_irq_src           *irq_src;
  71         unsigned                        irq_type;
  72         struct timer_list               fallback_timer;
  73         unsigned                        num_fences_mask;
  74         spinlock_t                      lock;
  75         struct dma_fence                **fences;
  76 };
  77
  78 int amdgpu_fence_driver_init(struct amdgpu_device *adev);
  79 void amdgpu_fence_driver_fini(struct amdgpu_device *adev);
  80 void amdgpu_fence_driver_force_completion(struct amdgpu_device *adev);
  81 void amdgpu_fence_driver_force_completion_ring(struct amdgpu_ring *ring);
  82
  83 int amdgpu_fence_driver_init_ring(struct amdgpu_ring *ring,
  84                                   unsigned num_hw_submission);
  85 int amdgpu_fence_driver_start_ring(struct amdgpu_ring *ring,
  86                                    struct amdgpu_irq_src *irq_src,
  87                                    unsigned irq_type);
  88 void amdgpu_fence_driver_suspend(struct amdgpu_device *adev);
  89 void amdgpu_fence_driver_resume(struct amdgpu_device *adev);
  90 int amdgpu_fence_emit(struct amdgpu_ring *ring, struct dma_fence **fence);
  91 void amdgpu_fence_process(struct amdgpu_ring *ring);
  92 int amdgpu_fence_wait_empty(struct amdgpu_ring *ring);
  93 unsigned amdgpu_fence_count_emitted(struct amdgpu_ring *ring);
  94
  95 /*
  96  * Rings.
  97  */
  98
  99 /* provided by hw blocks that expose a ring buffer for commands */
 100 struct amdgpu_ring_funcs {
 101         enum amdgpu_ring_type   type;
 102         uint32_t                align_mask;
 103         u32                     nop;
 104         bool                    support_64bit_ptrs;
 105         unsigned                vmhub;
 106
 107         /* ring read/write ptr handling */
 108         u64 (*get_rptr)(struct amdgpu_ring *ring);
 109         u64 (*get_wptr)(struct amdgpu_ring *ring);
 110         void (*set_wptr)(struct amdgpu_ring *ring);
 111         /* validating and patching of IBs */
 112         int (*parse_cs)(struct amdgpu_cs_parser *p, uint32_t ib_idx);
 113         /* constants to calculate how many DW are needed for an emit */
 114         unsigned emit_frame_size;
 115         unsigned emit_ib_size;
 116         /* command emit functions */
 117         void (*emit_ib)(struct amdgpu_ring *ring,
 118                         struct amdgpu_ib *ib,
 119                         unsigned vm_id, bool ctx_switch);
 120         void (*emit_fence)(struct amdgpu_ring *ring, uint64_t addr,
 121                            uint64_t seq, unsigned flags);
 122         void (*emit_pipeline_sync)(struct amdgpu_ring *ring);
 123         void (*emit_vm_flush)(struct amdgpu_ring *ring, unsigned vm_id,
 124                               uint64_t pd_addr);
 125         void (*emit_hdp_flush)(struct amdgpu_ring *ring);
 126         void (*emit_hdp_invalidate)(struct amdgpu_ring *ring);
 127         void (*emit_gds_switch)(struct amdgpu_ring *ring, uint32_t vmid,
 128                                 uint32_t gds_base, uint32_t gds_size,
 129                                 uint32_t gws_base, uint32_t gws_size,
 130                                 uint32_t oa_base, uint32_t oa_size);
 131         /* testing functions */
 132         int (*test_ring)(struct amdgpu_ring *ring);
 133         int (*test_ib)(struct amdgpu_ring *ring, long timeout);
 134         /* insert NOP packets */
 135         void (*insert_nop)(struct amdgpu_ring *ring, uint32_t count);
 136         void (*insert_start)(struct amdgpu_ring *ring);
 137         void (*insert_end)(struct amdgpu_ring *ring);
 138         /* pad the indirect buffer to the necessary number of dw */
 139         void (*pad_ib)(struct amdgpu_ring *ring, struct amdgpu_ib *ib);
 140         unsigned (*init_cond_exec)(struct amdgpu_ring *ring);
 141         void (*patch_cond_exec)(struct amdgpu_ring *ring, unsigned offset);
 142         /* note usage for clock and power gating */
 143         void (*begin_use)(struct amdgpu_ring *ring);
 144         void (*end_use)(struct amdgpu_ring *ring);
 145         void (*emit_switch_buffer) (struct amdgpu_ring *ring);
 146         void (*emit_cntxcntl) (struct amdgpu_ring *ring, uint32_t flags);
 147         void (*emit_rreg)(struct amdgpu_ring *ring, uint32_t reg);
 148         void (*emit_wreg)(struct amdgpu_ring *ring, uint32_t reg, uint32_t val);
 149         void (*emit_tmz)(struct amdgpu_ring *ring, bool start);
 150 };
 151
 152 struct amdgpu_ring {
 153         struct amdgpu_device            *adev;
 154         const struct amdgpu_ring_funcs  *funcs;
 155         struct amdgpu_fence_driver      fence_drv;
 156         struct amd_gpu_scheduler        sched;
 157         struct list_head                lru_list;
 158
 159         struct amdgpu_bo        *ring_obj;
 160         volatile uint32_t       *ring;
 161         unsigned                rptr_offs;
 162         u64                     wptr;
 163         u64                     wptr_old;
 164         unsigned                ring_size;
 165         unsigned                max_dw;
 166         int                     count_dw;
 167         uint64_t                gpu_addr;
 168         uint64_t                ptr_mask;
 169         uint32_t                buf_mask;
 170         bool                    ready;
 171         u32                     idx;
 172         u32                     me;
 173         u32                     pipe;
 174         u32                     queue;
 175         struct amdgpu_bo        *mqd_obj;
 176         uint64_t                mqd_gpu_addr;
 177         void                    *mqd_ptr;
 178         uint64_t                eop_gpu_addr;
 179         u32                     doorbell_index;
 180         bool                    use_doorbell;
 181         unsigned                wptr_offs;
 182         unsigned                fence_offs;
 183         uint64_t                current_ctx;
 184         char                    name[16];
 185         unsigned                cond_exe_offs;
 186         u64                     cond_exe_gpu_addr;
 187         volatile u32            *cond_exe_cpu_addr;
 188         unsigned                vm_inv_eng;
 189         bool                    has_compute_vm_bug;
 190 #if defined(CONFIG_DEBUG_FS)
 191         struct dentry *ent;
 192 #endif
 193 };
 194
 195 int amdgpu_ring_alloc(struct amdgpu_ring *ring, unsigned ndw);
 196 void amdgpu_ring_insert_nop(struct amdgpu_ring *ring, uint32_t count);
 197 void amdgpu_ring_generic_pad_ib(struct amdgpu_ring *ring, struct amdgpu_ib *ib);
 198 void amdgpu_ring_commit(struct amdgpu_ring *ring);
 199 void amdgpu_ring_undo(struct amdgpu_ring *ring);
 200 int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring,
 201                      unsigned ring_size, struct amdgpu_irq_src *irq_src,
 202                      unsigned irq_type);
 203 void amdgpu_ring_fini(struct amdgpu_ring *ring);
 204 int amdgpu_ring_lru_get(struct amdgpu_device *adev, int type, int *blacklist,
 205                         int num_blacklist, struct amdgpu_ring **ring);
 206 void amdgpu_ring_lru_touch(struct amdgpu_device *adev, struct amdgpu_ring *ring);
 207 static inline void amdgpu_ring_clear_ring(struct amdgpu_ring *ring)
 208 {
 209         int i = 0;
 210         while (i <= ring->buf_mask)
 211                 ring->ring[i++] = ring->funcs->nop;
 212
 213 }
 214
 215 static inline void amdgpu_ring_write(struct amdgpu_ring *ring, uint32_t v)
 216 {
 217         if (ring->count_dw <= 0)
 218                 DRM_ERROR("amdgpu: writing more dwords to the ring than expected!\n");
 219         ring->ring[ring->wptr++ & ring->buf_mask] = v;
 220         ring->wptr &= ring->ptr_mask;
 221         ring->count_dw--;
 222 }
 223
 224 static inline void amdgpu_ring_write_multiple(struct amdgpu_ring *ring,
 225                                               void *src, int count_dw)
 226 {
 227         unsigned occupied, chunk1, chunk2;
 228         void *dst;
 229
 230         if (unlikely(ring->count_dw < count_dw))
 231                 DRM_ERROR("amdgpu: writing more dwords to the ring than expected!\n");
 232
 233         occupied = ring->wptr & ring->buf_mask;
 234         dst = (void *)&ring->ring[occupied];
 235         chunk1 = ring->buf_mask + 1 - occupied;
 236         chunk1 = (chunk1 >= count_dw) ? count_dw: chunk1;
 237         chunk2 = count_dw - chunk1;
 238         chunk1 <<= 2;
 239         chunk2 <<= 2;
 240
 241         if (chunk1)
 242                 memcpy(dst, src, chunk1);
 243
 244         if (chunk2) {
 245                 src += chunk1;
 246                 dst = (void *)ring->ring;
 247                 memcpy(dst, src, chunk2);
 248         }
 249
 250         ring->wptr += count_dw;
 251         ring->wptr &= ring->ptr_mask;
 252         ring->count_dw -= count_dw;
 253 }
 254
 255 #endif