2 * Copyright (C) 2013 Red Hat
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program. If not, see <http://www.gnu.org/licenses/>.
21 #include <linux/clk.h>
22 #include <linux/regulator/consumer.h>
25 #include "msm_fence.h"
26 #include "msm_ringbuffer.h"
28 struct msm_gem_submit;
29 struct msm_gpu_perfcntr;
31 struct msm_gpu_config {
36 unsigned int nr_rings;
39 /* So far, with hardware that I've seen to date, we can have:
40 * + zero, one, or two z180 2d cores
41 * + a3xx or a2xx 3d core, which share a common CP (the firmware
42 * for the CP seems to implement some different PM4 packet types
43 * but the basics of cmdstream submission are the same)
45 * Which means that the eventual complete "class" hierarchy, once
46 * support for all past and present hw is in place, becomes:
53 struct msm_gpu_funcs {
54 int (*get_param)(struct msm_gpu *gpu, uint32_t param, uint64_t *value);
55 int (*hw_init)(struct msm_gpu *gpu);
56 int (*pm_suspend)(struct msm_gpu *gpu);
57 int (*pm_resume)(struct msm_gpu *gpu);
58 void (*submit)(struct msm_gpu *gpu, struct msm_gem_submit *submit,
59 struct msm_file_private *ctx);
60 void (*flush)(struct msm_gpu *gpu, struct msm_ringbuffer *ring);
61 irqreturn_t (*irq)(struct msm_gpu *irq);
62 struct msm_ringbuffer *(*active_ring)(struct msm_gpu *gpu);
63 void (*recover)(struct msm_gpu *gpu);
64 void (*destroy)(struct msm_gpu *gpu);
65 #ifdef CONFIG_DEBUG_FS
66 /* show GPU status in debugfs: */
67 void (*show)(struct msm_gpu *gpu, struct seq_file *m);
68 /* for generation specific debugfs: */
69 int (*debugfs_init)(struct msm_gpu *gpu, struct drm_minor *minor);
71 int (*gpu_busy)(struct msm_gpu *gpu, uint64_t *value);
76 struct drm_device *dev;
77 struct platform_device *pdev;
78 const struct msm_gpu_funcs *funcs;
80 /* performance counters (hw & sw): */
87 uint32_t totaltime, activetime; /* sw counters */
88 uint32_t last_cntrs[5]; /* hw counters */
89 const struct msm_gpu_perfcntr *perfcntrs;
90 uint32_t num_perfcntrs;
92 struct msm_ringbuffer *rb[MSM_GPU_MAX_RINGS];
95 /* list of GEM active objects: */
96 struct list_head active_list;
98 /* does gpu need hw_init? */
101 /* worker for handling active-list retiring: */
102 struct work_struct retire_work;
107 struct msm_gem_address_space *aspace;
110 struct regulator *gpu_reg, *gpu_cx;
111 struct clk **grp_clks;
113 struct clk *ebi1_clk, *core_clk, *rbbmtimer_clk;
116 /* Hang and Inactivity Detection:
118 #define DRM_MSM_INACTIVE_PERIOD 66 /* in ms (roughly four frames) */
120 #define DRM_MSM_HANGCHECK_PERIOD 500 /* in ms */
121 #define DRM_MSM_HANGCHECK_JIFFIES msecs_to_jiffies(DRM_MSM_HANGCHECK_PERIOD)
122 struct timer_list hangcheck_timer;
123 struct work_struct recover_work;
125 struct drm_gem_object *memptrs_bo;
128 struct devfreq *devfreq;
134 /* It turns out that all targets use the same ringbuffer size */
135 #define MSM_GPU_RINGBUFFER_SZ SZ_32K
136 #define MSM_GPU_RINGBUFFER_BLKSIZE 32
138 #define MSM_GPU_RB_CNTL_DEFAULT \
139 (AXXX_CP_RB_CNTL_BUFSZ(ilog2(MSM_GPU_RINGBUFFER_SZ / 8)) | \
140 AXXX_CP_RB_CNTL_BLKSZ(ilog2(MSM_GPU_RINGBUFFER_BLKSIZE / 8)))
142 static inline bool msm_gpu_active(struct msm_gpu *gpu)
146 for (i = 0; i < gpu->nr_rings; i++) {
147 struct msm_ringbuffer *ring = gpu->rb[i];
149 if (ring->seqno > ring->memptrs->fence)
157 * The select_reg and select_val are just there for the benefit of the child
158 * class that actually enables the perf counter.. but msm_gpu base class
159 * will handle sampling/displaying the counters.
162 struct msm_gpu_perfcntr {
169 struct msm_gpu_submitqueue {
174 struct list_head node;
178 static inline void gpu_write(struct msm_gpu *gpu, u32 reg, u32 data)
180 msm_writel(data, gpu->mmio + (reg << 2));
183 static inline u32 gpu_read(struct msm_gpu *gpu, u32 reg)
185 return msm_readl(gpu->mmio + (reg << 2));
188 static inline void gpu_rmw(struct msm_gpu *gpu, u32 reg, u32 mask, u32 or)
190 uint32_t val = gpu_read(gpu, reg);
193 gpu_write(gpu, reg, val | or);
196 static inline u64 gpu_read64(struct msm_gpu *gpu, u32 lo, u32 hi)
201 * Why not a readq here? Two reasons: 1) many of the LO registers are
202 * not quad word aligned and 2) the GPU hardware designers have a bit
203 * of a history of putting registers where they fit, especially in
204 * spins. The longer a GPU family goes the higher the chance that
205 * we'll get burned. We could do a series of validity checks if we
206 * wanted to, but really is a readq() that much better? Nah.
210 * For some lo/hi registers (like perfcounters), the hi value is latched
211 * when the lo is read, so make sure to read the lo first to trigger
214 val = (u64) msm_readl(gpu->mmio + (lo << 2));
215 val |= ((u64) msm_readl(gpu->mmio + (hi << 2)) << 32);
220 static inline void gpu_write64(struct msm_gpu *gpu, u32 lo, u32 hi, u64 val)
222 /* Why not a writeq here? Read the screed above */
223 msm_writel(lower_32_bits(val), gpu->mmio + (lo << 2));
224 msm_writel(upper_32_bits(val), gpu->mmio + (hi << 2));
227 int msm_gpu_pm_suspend(struct msm_gpu *gpu);
228 int msm_gpu_pm_resume(struct msm_gpu *gpu);
230 int msm_gpu_hw_init(struct msm_gpu *gpu);
232 void msm_gpu_perfcntr_start(struct msm_gpu *gpu);
233 void msm_gpu_perfcntr_stop(struct msm_gpu *gpu);
234 int msm_gpu_perfcntr_sample(struct msm_gpu *gpu, uint32_t *activetime,
235 uint32_t *totaltime, uint32_t ncntrs, uint32_t *cntrs);
237 void msm_gpu_retire(struct msm_gpu *gpu);
238 void msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
239 struct msm_file_private *ctx);
241 int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
242 struct msm_gpu *gpu, const struct msm_gpu_funcs *funcs,
243 const char *name, struct msm_gpu_config *config);
245 void msm_gpu_cleanup(struct msm_gpu *gpu);
247 struct msm_gpu *adreno_load_gpu(struct drm_device *dev);
248 void __init adreno_register(void);
249 void __exit adreno_unregister(void);
251 static inline void msm_submitqueue_put(struct msm_gpu_submitqueue *queue)
254 kref_put(&queue->ref, msm_submitqueue_destroy);
257 #endif /* __MSM_GPU_H__ */