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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __NVKM_FBRAM_FUC_H__
   3 #define __NVKM_FBRAM_FUC_H__
   4 #include <subdev/fb.h>
   5 #include <subdev/pmu.h>
   6
   7 struct ramfuc {
   8         struct nvkm_memx *memx;
   9         struct nvkm_fb *fb;
  10         int sequence;
  11 };
  12
  13 struct ramfuc_reg {
  14         int sequence;
  15         bool force;
  16         u32 addr;
  17         u32 stride; /* in bytes */
  18         u32 mask;
  19         u32 data;
  20 };
  21
  22 static inline struct ramfuc_reg
  23 ramfuc_stride(u32 addr, u32 stride, u32 mask)
  24 {
  25         return (struct ramfuc_reg) {
  26                 .sequence = 0,
  27                 .addr = addr,
  28                 .stride = stride,
  29                 .mask = mask,
  30                 .data = 0xdeadbeef,
  31         };
  32 }
  33
  34 static inline struct ramfuc_reg
  35 ramfuc_reg2(u32 addr1, u32 addr2)
  36 {
  37         return (struct ramfuc_reg) {
  38                 .sequence = 0,
  39                 .addr = addr1,
  40                 .stride = addr2 - addr1,
  41                 .mask = 0x3,
  42                 .data = 0xdeadbeef,
  43         };
  44 }
  45
  46 static noinline struct ramfuc_reg
  47 ramfuc_reg(u32 addr)
  48 {
  49         return (struct ramfuc_reg) {
  50                 .sequence = 0,
  51                 .addr = addr,
  52                 .stride = 0,
  53                 .mask = 0x1,
  54                 .data = 0xdeadbeef,
  55         };
  56 }
  57
  58 static inline int
  59 ramfuc_init(struct ramfuc *ram, struct nvkm_fb *fb)
  60 {
  61         int ret = nvkm_memx_init(fb->subdev.device->pmu, &ram->memx);
  62         if (ret)
  63                 return ret;
  64
  65         ram->sequence++;
  66         ram->fb = fb;
  67         return 0;
  68 }
  69
  70 static inline int
  71 ramfuc_exec(struct ramfuc *ram, bool exec)
  72 {
  73         int ret = 0;
  74         if (ram->fb) {
  75                 ret = nvkm_memx_fini(&ram->memx, exec);
  76                 ram->fb = NULL;
  77         }
  78         return ret;
  79 }
  80
  81 static inline u32
  82 ramfuc_rd32(struct ramfuc *ram, struct ramfuc_reg *reg)
  83 {
  84         struct nvkm_device *device = ram->fb->subdev.device;
  85         if (reg->sequence != ram->sequence)
  86                 reg->data = nvkm_rd32(device, reg->addr);
  87         return reg->data;
  88 }
  89
  90 static inline void
  91 ramfuc_wr32(struct ramfuc *ram, struct ramfuc_reg *reg, u32 data)
  92 {
  93         unsigned int mask, off = 0;
  94
  95         reg->sequence = ram->sequence;
  96         reg->data = data;
  97
  98         for (mask = reg->mask; mask > 0; mask = (mask & ~1) >> 1) {
  99                 if (mask & 1)
 100                         nvkm_memx_wr32(ram->memx, reg->addr+off, reg->data);
 101                 off += reg->stride;
 102         }
 103 }
 104
 105 static inline void
 106 ramfuc_nuke(struct ramfuc *ram, struct ramfuc_reg *reg)
 107 {
 108         reg->force = true;
 109 }
 110
 111 static inline u32
 112 ramfuc_mask(struct ramfuc *ram, struct ramfuc_reg *reg, u32 mask, u32 data)
 113 {
 114         u32 temp = ramfuc_rd32(ram, reg);
 115         if (temp != ((temp & ~mask) | data) || reg->force) {
 116                 ramfuc_wr32(ram, reg, (temp & ~mask) | data);
 117                 reg->force = false;
 118         }
 119         return temp;
 120 }
 121
 122 static inline void
 123 ramfuc_wait(struct ramfuc *ram, u32 addr, u32 mask, u32 data, u32 nsec)
 124 {
 125         nvkm_memx_wait(ram->memx, addr, mask, data, nsec);
 126 }
 127
 128 static inline void
 129 ramfuc_nsec(struct ramfuc *ram, u32 nsec)
 130 {
 131         nvkm_memx_nsec(ram->memx, nsec);
 132 }
 133
 134 static inline void
 135 ramfuc_wait_vblank(struct ramfuc *ram)
 136 {
 137         nvkm_memx_wait_vblank(ram->memx);
 138 }
 139
 140 static inline void
 141 ramfuc_train(struct ramfuc *ram)
 142 {
 143         nvkm_memx_train(ram->memx);
 144 }
 145
 146 static inline int
 147 ramfuc_train_result(struct nvkm_fb *fb, u32 *result, u32 rsize)
 148 {
 149         return nvkm_memx_train_result(fb->subdev.device->pmu, result, rsize);
 150 }
 151
 152 static inline void
 153 ramfuc_block(struct ramfuc *ram)
 154 {
 155         nvkm_memx_block(ram->memx);
 156 }
 157
 158 static inline void
 159 ramfuc_unblock(struct ramfuc *ram)
 160 {
 161         nvkm_memx_unblock(ram->memx);
 162 }
 163
 164 #define ram_init(s,p)        ramfuc_init(&(s)->base, (p))
 165 #define ram_exec(s,e)        ramfuc_exec(&(s)->base, (e))
 166 #define ram_have(s,r)        ((s)->r_##r.addr != 0x000000)
 167 #define ram_rd32(s,r)        ramfuc_rd32(&(s)->base, &(s)->r_##r)
 168 #define ram_wr32(s,r,d)      ramfuc_wr32(&(s)->base, &(s)->r_##r, (d))
 169 #define ram_nuke(s,r)        ramfuc_nuke(&(s)->base, &(s)->r_##r)
 170 #define ram_mask(s,r,m,d)    ramfuc_mask(&(s)->base, &(s)->r_##r, (m), (d))
 171 #define ram_wait(s,r,m,d,n)  ramfuc_wait(&(s)->base, (r), (m), (d), (n))
 172 #define ram_nsec(s,n)        ramfuc_nsec(&(s)->base, (n))
 173 #define ram_wait_vblank(s)   ramfuc_wait_vblank(&(s)->base)
 174 #define ram_train(s)         ramfuc_train(&(s)->base)
 175 #define ram_train_result(s,r,l) ramfuc_train_result((s), (r), (l))
 176 #define ram_block(s)         ramfuc_block(&(s)->base)
 177 #define ram_unblock(s)       ramfuc_unblock(&(s)->base)
 178 #endif