drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramfuc.h

   1 #ifndef __NVKM_FBRAM_FUC_H__
   2 #define __NVKM_FBRAM_FUC_H__
   3 #include <subdev/fb.h>
   4 #include <subdev/pmu.h>
   5
   6 struct ramfuc {
   7         struct nvkm_memx *memx;
   8         struct nvkm_fb *fb;
   9         int sequence;
  10 };
  11
  12 struct ramfuc_reg {
  13         int sequence;
  14         bool force;
  15         u32 addr;
  16         u32 stride; /* in bytes */
  17         u32 mask;
  18         u32 data;
  19 };
  20
  21 static inline struct ramfuc_reg
  22 ramfuc_stride(u32 addr, u32 stride, u32 mask)
  23 {
  24         return (struct ramfuc_reg) {
  25                 .sequence = 0,
  26                 .addr = addr,
  27                 .stride = stride,
  28                 .mask = mask,
  29                 .data = 0xdeadbeef,
  30         };
  31 }
  32
  33 static inline struct ramfuc_reg
  34 ramfuc_reg2(u32 addr1, u32 addr2)
  35 {
  36         return (struct ramfuc_reg) {
  37                 .sequence = 0,
  38                 .addr = addr1,
  39                 .stride = addr2 - addr1,
  40                 .mask = 0x3,
  41                 .data = 0xdeadbeef,
  42         };
  43 }
  44
  45 static noinline struct ramfuc_reg
  46 ramfuc_reg(u32 addr)
  47 {
  48         return (struct ramfuc_reg) {
  49                 .sequence = 0,
  50                 .addr = addr,
  51                 .stride = 0,
  52                 .mask = 0x1,
  53                 .data = 0xdeadbeef,
  54         };
  55 }
  56
  57 static inline int
  58 ramfuc_init(struct ramfuc *ram, struct nvkm_fb *fb)
  59 {
  60         struct nvkm_pmu *pmu = nvkm_pmu(fb);
  61         int ret;
  62
  63         ret = nvkm_memx_init(pmu, &ram->memx);
  64         if (ret)
  65                 return ret;
  66
  67         ram->sequence++;
  68         ram->fb = fb;
  69         return 0;
  70 }
  71
  72 static inline int
  73 ramfuc_exec(struct ramfuc *ram, bool exec)
  74 {
  75         int ret = 0;
  76         if (ram->fb) {
  77                 ret = nvkm_memx_fini(&ram->memx, exec);
  78                 ram->fb = NULL;
  79         }
  80         return ret;
  81 }
  82
  83 static inline u32
  84 ramfuc_rd32(struct ramfuc *ram, struct ramfuc_reg *reg)
  85 {
  86         struct nvkm_device *device = ram->fb->subdev.device;
  87         if (reg->sequence != ram->sequence)
  88                 reg->data = nvkm_rd32(device, reg->addr);
  89         return reg->data;
  90 }
  91
  92 static inline void
  93 ramfuc_wr32(struct ramfuc *ram, struct ramfuc_reg *reg, u32 data)
  94 {
  95         unsigned int mask, off = 0;
  96
  97         reg->sequence = ram->sequence;
  98         reg->data = data;
  99
 100         for (mask = reg->mask; mask > 0; mask = (mask & ~1) >> 1) {
 101                 if (mask & 1)
 102                         nvkm_memx_wr32(ram->memx, reg->addr+off, reg->data);
 103                 off += reg->stride;
 104         }
 105 }
 106
 107 static inline void
 108 ramfuc_nuke(struct ramfuc *ram, struct ramfuc_reg *reg)
 109 {
 110         reg->force = true;
 111 }
 112
 113 static inline u32
 114 ramfuc_mask(struct ramfuc *ram, struct ramfuc_reg *reg, u32 mask, u32 data)
 115 {
 116         u32 temp = ramfuc_rd32(ram, reg);
 117         if (temp != ((temp & ~mask) | data) || reg->force) {
 118                 ramfuc_wr32(ram, reg, (temp & ~mask) | data);
 119                 reg->force = false;
 120         }
 121         return temp;
 122 }
 123
 124 static inline void
 125 ramfuc_wait(struct ramfuc *ram, u32 addr, u32 mask, u32 data, u32 nsec)
 126 {
 127         nvkm_memx_wait(ram->memx, addr, mask, data, nsec);
 128 }
 129
 130 static inline void
 131 ramfuc_nsec(struct ramfuc *ram, u32 nsec)
 132 {
 133         nvkm_memx_nsec(ram->memx, nsec);
 134 }
 135
 136 static inline void
 137 ramfuc_wait_vblank(struct ramfuc *ram)
 138 {
 139         nvkm_memx_wait_vblank(ram->memx);
 140 }
 141
 142 static inline void
 143 ramfuc_train(struct ramfuc *ram)
 144 {
 145         nvkm_memx_train(ram->memx);
 146 }
 147
 148 static inline int
 149 ramfuc_train_result(struct nvkm_fb *fb, u32 *result, u32 rsize)
 150 {
 151         struct nvkm_pmu *pmu = nvkm_pmu(fb);
 152
 153         return nvkm_memx_train_result(pmu, result, rsize);
 154 }
 155
 156 static inline void
 157 ramfuc_block(struct ramfuc *ram)
 158 {
 159         nvkm_memx_block(ram->memx);
 160 }
 161
 162 static inline void
 163 ramfuc_unblock(struct ramfuc *ram)
 164 {
 165         nvkm_memx_unblock(ram->memx);
 166 }
 167
 168 #define ram_init(s,p)        ramfuc_init(&(s)->base, (p))
 169 #define ram_exec(s,e)        ramfuc_exec(&(s)->base, (e))
 170 #define ram_have(s,r)        ((s)->r_##r.addr != 0x000000)
 171 #define ram_rd32(s,r)        ramfuc_rd32(&(s)->base, &(s)->r_##r)
 172 #define ram_wr32(s,r,d)      ramfuc_wr32(&(s)->base, &(s)->r_##r, (d))
 173 #define ram_nuke(s,r)        ramfuc_nuke(&(s)->base, &(s)->r_##r)
 174 #define ram_mask(s,r,m,d)    ramfuc_mask(&(s)->base, &(s)->r_##r, (m), (d))
 175 #define ram_wait(s,r,m,d,n)  ramfuc_wait(&(s)->base, (r), (m), (d), (n))
 176 #define ram_nsec(s,n)        ramfuc_nsec(&(s)->base, (n))
 177 #define ram_wait_vblank(s)   ramfuc_wait_vblank(&(s)->base)
 178 #define ram_train(s)         ramfuc_train(&(s)->base)
 179 #define ram_train_result(s,r,l) ramfuc_train_result((s), (r), (l))
 180 #define ram_block(s)         ramfuc_block(&(s)->base)
 181 #define ram_unblock(s)       ramfuc_unblock(&(s)->base)
 182 #endif