drivers/gpu/drm/msm/msm_gpu.h

   1 /*
   2  * Copyright (C) 2013 Red Hat
   3  * Author: Rob Clark <robdclark@gmail.com>
   4  *
   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.
   8  *
   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
  12  * more details.
  13  *
  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/>.
  16  */
  17
  18 #ifndef __MSM_GPU_H__
  19 #define __MSM_GPU_H__
  20
  21 #include <linux/clk.h>
  22 #include <linux/regulator/consumer.h>
  23
  24 #include "msm_drv.h"
  25 #include "msm_ringbuffer.h"
  26
  27 struct msm_gem_submit;
  28
  29 /* So far, with hardware that I've seen to date, we can have:
  30  *  + zero, one, or two z180 2d cores
  31  *  + a3xx or a2xx 3d core, which share a common CP (the firmware
  32  *    for the CP seems to implement some different PM4 packet types
  33  *    but the basics of cmdstream submission are the same)
  34  *
  35  * Which means that the eventual complete "class" hierarchy, once
  36  * support for all past and present hw is in place, becomes:
  37  *  + msm_gpu
  38  *    + adreno_gpu
  39  *      + a3xx_gpu
  40  *      + a2xx_gpu
  41  *    + z180_gpu
  42  */
  43 struct msm_gpu_funcs {
  44         int (*get_param)(struct msm_gpu *gpu, uint32_t param, uint64_t *value);
  45         int (*hw_init)(struct msm_gpu *gpu);
  46         int (*pm_suspend)(struct msm_gpu *gpu);
  47         int (*pm_resume)(struct msm_gpu *gpu);
  48         int (*submit)(struct msm_gpu *gpu, struct msm_gem_submit *submit,
  49                         struct msm_file_private *ctx);
  50         void (*flush)(struct msm_gpu *gpu);
  51         void (*idle)(struct msm_gpu *gpu);
  52         irqreturn_t (*irq)(struct msm_gpu *irq);
  53         uint32_t (*last_fence)(struct msm_gpu *gpu);
  54         void (*recover)(struct msm_gpu *gpu);
  55         void (*destroy)(struct msm_gpu *gpu);
  56 #ifdef CONFIG_DEBUG_FS
  57         /* show GPU status in debugfs: */
  58         void (*show)(struct msm_gpu *gpu, struct seq_file *m);
  59 #endif
  60 };
  61
  62 struct msm_gpu {
  63         const char *name;
  64         struct drm_device *dev;
  65         const struct msm_gpu_funcs *funcs;
  66
  67         struct msm_ringbuffer *rb;
  68         uint32_t rb_iova;
  69
  70         /* list of GEM active objects: */
  71         struct list_head active_list;
  72
  73         uint32_t submitted_fence;
  74
  75         /* worker for handling active-list retiring: */
  76         struct work_struct retire_work;
  77
  78         void __iomem *mmio;
  79         int irq;
  80
  81         struct iommu_domain *iommu;
  82         int id;
  83
  84         /* Power Control: */
  85         struct regulator *gpu_reg, *gpu_cx;
  86         struct clk *ebi1_clk, *grp_clks[5];
  87         uint32_t fast_rate, slow_rate, bus_freq;
  88         uint32_t bsc;
  89
  90         /* Hang Detction: */
  91 #define DRM_MSM_HANGCHECK_PERIOD 500 /* in ms */
  92 #define DRM_MSM_HANGCHECK_JIFFIES msecs_to_jiffies(DRM_MSM_HANGCHECK_PERIOD)
  93         struct timer_list hangcheck_timer;
  94         uint32_t hangcheck_fence;
  95         struct work_struct recover_work;
  96 };
  97
  98 static inline void gpu_write(struct msm_gpu *gpu, u32 reg, u32 data)
  99 {
 100         msm_writel(data, gpu->mmio + (reg << 2));
 101 }
 102
 103 static inline u32 gpu_read(struct msm_gpu *gpu, u32 reg)
 104 {
 105         return msm_readl(gpu->mmio + (reg << 2));
 106 }
 107
 108 int msm_gpu_pm_suspend(struct msm_gpu *gpu);
 109 int msm_gpu_pm_resume(struct msm_gpu *gpu);
 110
 111 void msm_gpu_retire(struct msm_gpu *gpu);
 112 int msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
 113                 struct msm_file_private *ctx);
 114
 115 int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 116                 struct msm_gpu *gpu, const struct msm_gpu_funcs *funcs,
 117                 const char *name, const char *ioname, const char *irqname, int ringsz);
 118 void msm_gpu_cleanup(struct msm_gpu *gpu);
 119
 120 struct msm_gpu *a3xx_gpu_init(struct drm_device *dev);
 121 void __init a3xx_register(void);
 122 void __exit a3xx_unregister(void);
 123
 124 #endif /* __MSM_GPU_H__ */