1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2013 Red Hat 4 * Author: Rob Clark <robdclark@gmail.com> 5 */ 6 7 #ifndef __MSM_GPU_H__ 8 #define __MSM_GPU_H__ 9 10 #include <linux/clk.h> 11 #include <linux/interconnect.h> 12 #include <linux/regulator/consumer.h> 13 14 #include "msm_drv.h" 15 #include "msm_fence.h" 16 #include "msm_ringbuffer.h" 17 18 struct msm_gem_submit; 19 struct msm_gpu_perfcntr; 20 struct msm_gpu_state; 21 22 struct msm_gpu_config { 23 const char *ioname; 24 unsigned int nr_rings; 25 }; 26 27 /* So far, with hardware that I've seen to date, we can have: 28 * + zero, one, or two z180 2d cores 29 * + a3xx or a2xx 3d core, which share a common CP (the firmware 30 * for the CP seems to implement some different PM4 packet types 31 * but the basics of cmdstream submission are the same) 32 * 33 * Which means that the eventual complete "class" hierarchy, once 34 * support for all past and present hw is in place, becomes: 35 * + msm_gpu 36 * + adreno_gpu 37 * + a3xx_gpu 38 * + a2xx_gpu 39 * + z180_gpu 40 */ 41 struct msm_gpu_funcs { 42 int (*get_param)(struct msm_gpu *gpu, uint32_t param, uint64_t *value); 43 int (*hw_init)(struct msm_gpu *gpu); 44 int (*pm_suspend)(struct msm_gpu *gpu); 45 int (*pm_resume)(struct msm_gpu *gpu); 46 void (*submit)(struct msm_gpu *gpu, struct msm_gem_submit *submit, 47 struct msm_file_private *ctx); 48 void (*flush)(struct msm_gpu *gpu, struct msm_ringbuffer *ring); 49 irqreturn_t (*irq)(struct msm_gpu *irq); 50 struct msm_ringbuffer *(*active_ring)(struct msm_gpu *gpu); 51 void (*recover)(struct msm_gpu *gpu); 52 void (*destroy)(struct msm_gpu *gpu); 53 #if defined(CONFIG_DEBUG_FS) || defined(CONFIG_DEV_COREDUMP) 54 /* show GPU status in debugfs: */ 55 void (*show)(struct msm_gpu *gpu, struct msm_gpu_state *state, 56 struct drm_printer *p); 57 /* for generation specific debugfs: */ 58 void (*debugfs_init)(struct msm_gpu *gpu, struct drm_minor *minor); 59 #endif 60 unsigned long (*gpu_busy)(struct msm_gpu *gpu); 61 struct msm_gpu_state *(*gpu_state_get)(struct msm_gpu *gpu); 62 int (*gpu_state_put)(struct msm_gpu_state *state); 63 unsigned long (*gpu_get_freq)(struct msm_gpu *gpu); 64 void (*gpu_set_freq)(struct msm_gpu *gpu, unsigned long freq); 65 struct msm_gem_address_space *(*create_address_space) 66 (struct msm_gpu *gpu, struct platform_device *pdev); 67 }; 68 69 struct msm_gpu { 70 const char *name; 71 struct drm_device *dev; 72 struct platform_device *pdev; 73 const struct msm_gpu_funcs *funcs; 74 75 /* performance counters (hw & sw): */ 76 spinlock_t perf_lock; 77 bool perfcntr_active; 78 struct { 79 bool active; 80 ktime_t time; 81 } last_sample; 82 uint32_t totaltime, activetime; /* sw counters */ 83 uint32_t last_cntrs[5]; /* hw counters */ 84 const struct msm_gpu_perfcntr *perfcntrs; 85 uint32_t num_perfcntrs; 86 87 struct msm_ringbuffer *rb[MSM_GPU_MAX_RINGS]; 88 int nr_rings; 89 90 /* list of GEM active objects: */ 91 struct list_head active_list; 92 93 /* does gpu need hw_init? */ 94 bool needs_hw_init; 95 96 /* number of GPU hangs (for all contexts) */ 97 int global_faults; 98 99 /* worker for handling active-list retiring: */ 100 struct work_struct retire_work; 101 102 void __iomem *mmio; 103 int irq; 104 105 struct msm_gem_address_space *aspace; 106 107 /* Power Control: */ 108 struct regulator *gpu_reg, *gpu_cx; 109 struct clk_bulk_data *grp_clks; 110 int nr_clocks; 111 struct clk *ebi1_clk, *core_clk, *rbbmtimer_clk; 112 uint32_t fast_rate; 113 114 /* The gfx-mem interconnect path that's used by all GPU types. */ 115 struct icc_path *icc_path; 116 117 /* 118 * Second interconnect path for some A3xx and all A4xx GPUs to the 119 * On Chip MEMory (OCMEM). 120 */ 121 struct icc_path *ocmem_icc_path; 122 123 /* Hang and Inactivity Detection: 124 */ 125 #define DRM_MSM_INACTIVE_PERIOD 66 /* in ms (roughly four frames) */ 126 127 #define DRM_MSM_HANGCHECK_PERIOD 500 /* in ms */ 128 #define DRM_MSM_HANGCHECK_JIFFIES msecs_to_jiffies(DRM_MSM_HANGCHECK_PERIOD) 129 struct timer_list hangcheck_timer; 130 struct work_struct recover_work; 131 132 struct drm_gem_object *memptrs_bo; 133 134 struct { 135 struct devfreq *devfreq; 136 u64 busy_cycles; 137 ktime_t time; 138 } devfreq; 139 140 struct msm_gpu_state *crashstate; 141 }; 142 143 /* It turns out that all targets use the same ringbuffer size */ 144 #define MSM_GPU_RINGBUFFER_SZ SZ_32K 145 #define MSM_GPU_RINGBUFFER_BLKSIZE 32 146 147 #define MSM_GPU_RB_CNTL_DEFAULT \ 148 (AXXX_CP_RB_CNTL_BUFSZ(ilog2(MSM_GPU_RINGBUFFER_SZ / 8)) | \ 149 AXXX_CP_RB_CNTL_BLKSZ(ilog2(MSM_GPU_RINGBUFFER_BLKSIZE / 8))) 150 151 static inline bool msm_gpu_active(struct msm_gpu *gpu) 152 { 153 int i; 154 155 for (i = 0; i < gpu->nr_rings; i++) { 156 struct msm_ringbuffer *ring = gpu->rb[i]; 157 158 if (ring->seqno > ring->memptrs->fence) 159 return true; 160 } 161 162 return false; 163 } 164 165 /* Perf-Counters: 166 * The select_reg and select_val are just there for the benefit of the child 167 * class that actually enables the perf counter.. but msm_gpu base class 168 * will handle sampling/displaying the counters. 169 */ 170 171 struct msm_gpu_perfcntr { 172 uint32_t select_reg; 173 uint32_t sample_reg; 174 uint32_t select_val; 175 const char *name; 176 }; 177 178 struct msm_gpu_submitqueue { 179 int id; 180 u32 flags; 181 u32 prio; 182 int faults; 183 struct list_head node; 184 struct kref ref; 185 }; 186 187 struct msm_gpu_state_bo { 188 u64 iova; 189 size_t size; 190 void *data; 191 bool encoded; 192 }; 193 194 struct msm_gpu_state { 195 struct kref ref; 196 struct timespec64 time; 197 198 struct { 199 u64 iova; 200 u32 fence; 201 u32 seqno; 202 u32 rptr; 203 u32 wptr; 204 void *data; 205 int data_size; 206 bool encoded; 207 } ring[MSM_GPU_MAX_RINGS]; 208 209 int nr_registers; 210 u32 *registers; 211 212 u32 rbbm_status; 213 214 char *comm; 215 char *cmd; 216 217 int nr_bos; 218 struct msm_gpu_state_bo *bos; 219 }; 220 221 static inline void gpu_write(struct msm_gpu *gpu, u32 reg, u32 data) 222 { 223 msm_writel(data, gpu->mmio + (reg << 2)); 224 } 225 226 static inline u32 gpu_read(struct msm_gpu *gpu, u32 reg) 227 { 228 return msm_readl(gpu->mmio + (reg << 2)); 229 } 230 231 static inline void gpu_rmw(struct msm_gpu *gpu, u32 reg, u32 mask, u32 or) 232 { 233 uint32_t val = gpu_read(gpu, reg); 234 235 val &= ~mask; 236 gpu_write(gpu, reg, val | or); 237 } 238 239 static inline u64 gpu_read64(struct msm_gpu *gpu, u32 lo, u32 hi) 240 { 241 u64 val; 242 243 /* 244 * Why not a readq here? Two reasons: 1) many of the LO registers are 245 * not quad word aligned and 2) the GPU hardware designers have a bit 246 * of a history of putting registers where they fit, especially in 247 * spins. The longer a GPU family goes the higher the chance that 248 * we'll get burned. We could do a series of validity checks if we 249 * wanted to, but really is a readq() that much better? Nah. 250 */ 251 252 /* 253 * For some lo/hi registers (like perfcounters), the hi value is latched 254 * when the lo is read, so make sure to read the lo first to trigger 255 * that 256 */ 257 val = (u64) msm_readl(gpu->mmio + (lo << 2)); 258 val |= ((u64) msm_readl(gpu->mmio + (hi << 2)) << 32); 259 260 return val; 261 } 262 263 static inline void gpu_write64(struct msm_gpu *gpu, u32 lo, u32 hi, u64 val) 264 { 265 /* Why not a writeq here? Read the screed above */ 266 msm_writel(lower_32_bits(val), gpu->mmio + (lo << 2)); 267 msm_writel(upper_32_bits(val), gpu->mmio + (hi << 2)); 268 } 269 270 int msm_gpu_pm_suspend(struct msm_gpu *gpu); 271 int msm_gpu_pm_resume(struct msm_gpu *gpu); 272 void msm_gpu_resume_devfreq(struct msm_gpu *gpu); 273 274 int msm_gpu_hw_init(struct msm_gpu *gpu); 275 276 void msm_gpu_perfcntr_start(struct msm_gpu *gpu); 277 void msm_gpu_perfcntr_stop(struct msm_gpu *gpu); 278 int msm_gpu_perfcntr_sample(struct msm_gpu *gpu, uint32_t *activetime, 279 uint32_t *totaltime, uint32_t ncntrs, uint32_t *cntrs); 280 281 void msm_gpu_retire(struct msm_gpu *gpu); 282 void msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit, 283 struct msm_file_private *ctx); 284 285 int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev, 286 struct msm_gpu *gpu, const struct msm_gpu_funcs *funcs, 287 const char *name, struct msm_gpu_config *config); 288 289 void msm_gpu_cleanup(struct msm_gpu *gpu); 290 291 struct msm_gpu *adreno_load_gpu(struct drm_device *dev); 292 void __init adreno_register(void); 293 void __exit adreno_unregister(void); 294 295 static inline void msm_submitqueue_put(struct msm_gpu_submitqueue *queue) 296 { 297 if (queue) 298 kref_put(&queue->ref, msm_submitqueue_destroy); 299 } 300 301 static inline struct msm_gpu_state *msm_gpu_crashstate_get(struct msm_gpu *gpu) 302 { 303 struct msm_gpu_state *state = NULL; 304 305 mutex_lock(&gpu->dev->struct_mutex); 306 307 if (gpu->crashstate) { 308 kref_get(&gpu->crashstate->ref); 309 state = gpu->crashstate; 310 } 311 312 mutex_unlock(&gpu->dev->struct_mutex); 313 314 return state; 315 } 316 317 static inline void msm_gpu_crashstate_put(struct msm_gpu *gpu) 318 { 319 mutex_lock(&gpu->dev->struct_mutex); 320 321 if (gpu->crashstate) { 322 if (gpu->funcs->gpu_state_put(gpu->crashstate)) 323 gpu->crashstate = NULL; 324 } 325 326 mutex_unlock(&gpu->dev->struct_mutex); 327 } 328 329 #endif /* __MSM_GPU_H__ */ 330