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/adreno-smmu-priv.h>
11 #include <linux/clk.h>
12 #include <linux/interconnect.h>
13 #include <linux/pm_opp.h>
14 #include <linux/regulator/consumer.h>
15
16 #include "msm_drv.h"
17 #include "msm_fence.h"
18 #include "msm_ringbuffer.h"
19 #include "msm_gem.h"
20
21 struct msm_gem_submit;
22 struct msm_gpu_perfcntr;
23 struct msm_gpu_state;
24
25 struct msm_gpu_config {
26 const char *ioname;
27 unsigned int nr_rings;
28 };
29
30 /* So far, with hardware that I've seen to date, we can have:
31 * + zero, one, or two z180 2d cores
32 * + a3xx or a2xx 3d core, which share a common CP (the firmware
33 * for the CP seems to implement some different PM4 packet types
34 * but the basics of cmdstream submission are the same)
35 *
36 * Which means that the eventual complete "class" hierarchy, once
37 * support for all past and present hw is in place, becomes:
38 * + msm_gpu
39 * + adreno_gpu
40 * + a3xx_gpu
41 * + a2xx_gpu
42 * + z180_gpu
43 */
44 struct msm_gpu_funcs {
45 int (*get_param)(struct msm_gpu *gpu, uint32_t param, uint64_t *value);
46 int (*hw_init)(struct msm_gpu *gpu);
47 int (*pm_suspend)(struct msm_gpu *gpu);
48 int (*pm_resume)(struct msm_gpu *gpu);
49 void (*submit)(struct msm_gpu *gpu, struct msm_gem_submit *submit);
50 void (*flush)(struct msm_gpu *gpu, struct msm_ringbuffer *ring);
51 irqreturn_t (*irq)(struct msm_gpu *irq);
52 struct msm_ringbuffer *(*active_ring)(struct msm_gpu *gpu);
53 void (*recover)(struct msm_gpu *gpu);
54 void (*destroy)(struct msm_gpu *gpu);
55 #if defined(CONFIG_DEBUG_FS) || defined(CONFIG_DEV_COREDUMP)
56 /* show GPU status in debugfs: */
57 void (*show)(struct msm_gpu *gpu, struct msm_gpu_state *state,
58 struct drm_printer *p);
59 /* for generation specific debugfs: */
60 void (*debugfs_init)(struct msm_gpu *gpu, struct drm_minor *minor);
61 #endif
62 unsigned long (*gpu_busy)(struct msm_gpu *gpu);
63 struct msm_gpu_state *(*gpu_state_get)(struct msm_gpu *gpu);
64 int (*gpu_state_put)(struct msm_gpu_state *state);
65 unsigned long (*gpu_get_freq)(struct msm_gpu *gpu);
66 void (*gpu_set_freq)(struct msm_gpu *gpu, struct dev_pm_opp *opp);
67 struct msm_gem_address_space *(*create_address_space)
68 (struct msm_gpu *gpu, struct platform_device *pdev);
69 struct msm_gem_address_space *(*create_private_address_space)
70 (struct msm_gpu *gpu);
71 uint32_t (*get_rptr)(struct msm_gpu *gpu, struct msm_ringbuffer *ring);
72 };
73
74 struct msm_gpu {
75 const char *name;
76 struct drm_device *dev;
77 struct platform_device *pdev;
78 const struct msm_gpu_funcs *funcs;
79
80 struct adreno_smmu_priv adreno_smmu;
81
82 /* performance counters (hw & sw): */
83 spinlock_t perf_lock;
84 bool perfcntr_active;
85 struct {
86 bool active;
87 ktime_t time;
88 } last_sample;
89 uint32_t totaltime, activetime; /* sw counters */
90 uint32_t last_cntrs[5]; /* hw counters */
91 const struct msm_gpu_perfcntr *perfcntrs;
92 uint32_t num_perfcntrs;
93
94 struct msm_ringbuffer *rb[MSM_GPU_MAX_RINGS];
95 int nr_rings;
96
97 /* list of GEM active objects: */
98 struct list_head active_list;
99
100 /* does gpu need hw_init? */
101 bool needs_hw_init;
102
103 /* number of GPU hangs (for all contexts) */
104 int global_faults;
105
106 /* worker for handling active-list retiring: */
107 struct work_struct retire_work;
108
109 void __iomem *mmio;
110 int irq;
111
112 struct msm_gem_address_space *aspace;
113
114 /* Power Control: */
115 struct regulator *gpu_reg, *gpu_cx;
116 struct clk_bulk_data *grp_clks;
117 int nr_clocks;
118 struct clk *ebi1_clk, *core_clk, *rbbmtimer_clk;
119 uint32_t fast_rate;
120
121 /* The gfx-mem interconnect path that's used by all GPU types. */
122 struct icc_path *icc_path;
123
124 /*
125 * Second interconnect path for some A3xx and all A4xx GPUs to the
126 * On Chip MEMory (OCMEM).
127 */
128 struct icc_path *ocmem_icc_path;
129
130 /* Hang and Inactivity Detection:
131 */
132 #define DRM_MSM_INACTIVE_PERIOD 66 /* in ms (roughly four frames) */
133
134 #define DRM_MSM_HANGCHECK_PERIOD 500 /* in ms */
135 #define DRM_MSM_HANGCHECK_JIFFIES msecs_to_jiffies(DRM_MSM_HANGCHECK_PERIOD)
136 struct timer_list hangcheck_timer;
137 struct work_struct recover_work;
138
139 struct drm_gem_object *memptrs_bo;
140
141 struct {
142 struct devfreq *devfreq;
143 u64 busy_cycles;
144 ktime_t time;
145 } devfreq;
146
147 struct msm_gpu_state *crashstate;
148 /* True if the hardware supports expanded apriv (a650 and newer) */
149 bool hw_apriv;
150 };
151
dev_to_gpu(struct device * dev)152 static inline struct msm_gpu *dev_to_gpu(struct device *dev)
153 {
154 struct adreno_smmu_priv *adreno_smmu = dev_get_drvdata(dev);
155 return container_of(adreno_smmu, struct msm_gpu, adreno_smmu);
156 }
157
158 /* It turns out that all targets use the same ringbuffer size */
159 #define MSM_GPU_RINGBUFFER_SZ SZ_32K
160 #define MSM_GPU_RINGBUFFER_BLKSIZE 32
161
162 #define MSM_GPU_RB_CNTL_DEFAULT \
163 (AXXX_CP_RB_CNTL_BUFSZ(ilog2(MSM_GPU_RINGBUFFER_SZ / 8)) | \
164 AXXX_CP_RB_CNTL_BLKSZ(ilog2(MSM_GPU_RINGBUFFER_BLKSIZE / 8)))
165
msm_gpu_active(struct msm_gpu * gpu)166 static inline bool msm_gpu_active(struct msm_gpu *gpu)
167 {
168 int i;
169
170 for (i = 0; i < gpu->nr_rings; i++) {
171 struct msm_ringbuffer *ring = gpu->rb[i];
172
173 if (ring->seqno > ring->memptrs->fence)
174 return true;
175 }
176
177 return false;
178 }
179
180 /* Perf-Counters:
181 * The select_reg and select_val are just there for the benefit of the child
182 * class that actually enables the perf counter.. but msm_gpu base class
183 * will handle sampling/displaying the counters.
184 */
185
186 struct msm_gpu_perfcntr {
187 uint32_t select_reg;
188 uint32_t sample_reg;
189 uint32_t select_val;
190 const char *name;
191 };
192
193 struct msm_gpu_submitqueue {
194 int id;
195 u32 flags;
196 u32 prio;
197 int faults;
198 struct msm_file_private *ctx;
199 struct list_head node;
200 struct kref ref;
201 };
202
203 struct msm_gpu_state_bo {
204 u64 iova;
205 size_t size;
206 void *data;
207 bool encoded;
208 };
209
210 struct msm_gpu_state {
211 struct kref ref;
212 struct timespec64 time;
213
214 struct {
215 u64 iova;
216 u32 fence;
217 u32 seqno;
218 u32 rptr;
219 u32 wptr;
220 void *data;
221 int data_size;
222 bool encoded;
223 } ring[MSM_GPU_MAX_RINGS];
224
225 int nr_registers;
226 u32 *registers;
227
228 u32 rbbm_status;
229
230 char *comm;
231 char *cmd;
232
233 int nr_bos;
234 struct msm_gpu_state_bo *bos;
235 };
236
gpu_write(struct msm_gpu * gpu,u32 reg,u32 data)237 static inline void gpu_write(struct msm_gpu *gpu, u32 reg, u32 data)
238 {
239 msm_writel(data, gpu->mmio + (reg << 2));
240 }
241
gpu_read(struct msm_gpu * gpu,u32 reg)242 static inline u32 gpu_read(struct msm_gpu *gpu, u32 reg)
243 {
244 return msm_readl(gpu->mmio + (reg << 2));
245 }
246
gpu_rmw(struct msm_gpu * gpu,u32 reg,u32 mask,u32 or)247 static inline void gpu_rmw(struct msm_gpu *gpu, u32 reg, u32 mask, u32 or)
248 {
249 uint32_t val = gpu_read(gpu, reg);
250
251 val &= ~mask;
252 gpu_write(gpu, reg, val | or);
253 }
254
gpu_read64(struct msm_gpu * gpu,u32 lo,u32 hi)255 static inline u64 gpu_read64(struct msm_gpu *gpu, u32 lo, u32 hi)
256 {
257 u64 val;
258
259 /*
260 * Why not a readq here? Two reasons: 1) many of the LO registers are
261 * not quad word aligned and 2) the GPU hardware designers have a bit
262 * of a history of putting registers where they fit, especially in
263 * spins. The longer a GPU family goes the higher the chance that
264 * we'll get burned. We could do a series of validity checks if we
265 * wanted to, but really is a readq() that much better? Nah.
266 */
267
268 /*
269 * For some lo/hi registers (like perfcounters), the hi value is latched
270 * when the lo is read, so make sure to read the lo first to trigger
271 * that
272 */
273 val = (u64) msm_readl(gpu->mmio + (lo << 2));
274 val |= ((u64) msm_readl(gpu->mmio + (hi << 2)) << 32);
275
276 return val;
277 }
278
gpu_write64(struct msm_gpu * gpu,u32 lo,u32 hi,u64 val)279 static inline void gpu_write64(struct msm_gpu *gpu, u32 lo, u32 hi, u64 val)
280 {
281 /* Why not a writeq here? Read the screed above */
282 msm_writel(lower_32_bits(val), gpu->mmio + (lo << 2));
283 msm_writel(upper_32_bits(val), gpu->mmio + (hi << 2));
284 }
285
286 int msm_gpu_pm_suspend(struct msm_gpu *gpu);
287 int msm_gpu_pm_resume(struct msm_gpu *gpu);
288 void msm_gpu_resume_devfreq(struct msm_gpu *gpu);
289
290 int msm_gpu_hw_init(struct msm_gpu *gpu);
291
292 void msm_gpu_perfcntr_start(struct msm_gpu *gpu);
293 void msm_gpu_perfcntr_stop(struct msm_gpu *gpu);
294 int msm_gpu_perfcntr_sample(struct msm_gpu *gpu, uint32_t *activetime,
295 uint32_t *totaltime, uint32_t ncntrs, uint32_t *cntrs);
296
297 void msm_gpu_retire(struct msm_gpu *gpu);
298 void msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit);
299
300 int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
301 struct msm_gpu *gpu, const struct msm_gpu_funcs *funcs,
302 const char *name, struct msm_gpu_config *config);
303
304 struct msm_gem_address_space *
305 msm_gpu_create_private_address_space(struct msm_gpu *gpu, struct task_struct *task);
306
307 void msm_gpu_cleanup(struct msm_gpu *gpu);
308
309 struct msm_gpu *adreno_load_gpu(struct drm_device *dev);
310 void __init adreno_register(void);
311 void __exit adreno_unregister(void);
312
msm_submitqueue_put(struct msm_gpu_submitqueue * queue)313 static inline void msm_submitqueue_put(struct msm_gpu_submitqueue *queue)
314 {
315 if (queue)
316 kref_put(&queue->ref, msm_submitqueue_destroy);
317 }
318
msm_gpu_crashstate_get(struct msm_gpu * gpu)319 static inline struct msm_gpu_state *msm_gpu_crashstate_get(struct msm_gpu *gpu)
320 {
321 struct msm_gpu_state *state = NULL;
322
323 mutex_lock(&gpu->dev->struct_mutex);
324
325 if (gpu->crashstate) {
326 kref_get(&gpu->crashstate->ref);
327 state = gpu->crashstate;
328 }
329
330 mutex_unlock(&gpu->dev->struct_mutex);
331
332 return state;
333 }
334
msm_gpu_crashstate_put(struct msm_gpu * gpu)335 static inline void msm_gpu_crashstate_put(struct msm_gpu *gpu)
336 {
337 mutex_lock(&gpu->dev->struct_mutex);
338
339 if (gpu->crashstate) {
340 if (gpu->funcs->gpu_state_put(gpu->crashstate))
341 gpu->crashstate = NULL;
342 }
343
344 mutex_unlock(&gpu->dev->struct_mutex);
345 }
346
347 /*
348 * Simple macro to semi-cleanly add the MAP_PRIV flag for targets that can
349 * support expanded privileges
350 */
351 #define check_apriv(gpu, flags) \
352 (((gpu)->hw_apriv ? MSM_BO_MAP_PRIV : 0) | (flags))
353
354
355 #endif /* __MSM_GPU_H__ */
356