1 /* 2 * Copyright © 2014-2015 Broadcom 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 21 * IN THE SOFTWARE. 22 */ 23 24 #ifndef _UAPI_VC4_DRM_H_ 25 #define _UAPI_VC4_DRM_H_ 26 27 #include "drm.h" 28 29 #if defined(__cplusplus) 30 extern "C" { 31 #endif 32 33 #define DRM_VC4_SUBMIT_CL 0x00 34 #define DRM_VC4_WAIT_SEQNO 0x01 35 #define DRM_VC4_WAIT_BO 0x02 36 #define DRM_VC4_CREATE_BO 0x03 37 #define DRM_VC4_MMAP_BO 0x04 38 #define DRM_VC4_CREATE_SHADER_BO 0x05 39 #define DRM_VC4_GET_HANG_STATE 0x06 40 #define DRM_VC4_GET_PARAM 0x07 41 #define DRM_VC4_SET_TILING 0x08 42 #define DRM_VC4_GET_TILING 0x09 43 #define DRM_VC4_LABEL_BO 0x0a 44 45 #define DRM_IOCTL_VC4_SUBMIT_CL DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_SUBMIT_CL, struct drm_vc4_submit_cl) 46 #define DRM_IOCTL_VC4_WAIT_SEQNO DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_WAIT_SEQNO, struct drm_vc4_wait_seqno) 47 #define DRM_IOCTL_VC4_WAIT_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_WAIT_BO, struct drm_vc4_wait_bo) 48 #define DRM_IOCTL_VC4_CREATE_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_CREATE_BO, struct drm_vc4_create_bo) 49 #define DRM_IOCTL_VC4_MMAP_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_MMAP_BO, struct drm_vc4_mmap_bo) 50 #define DRM_IOCTL_VC4_CREATE_SHADER_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_CREATE_SHADER_BO, struct drm_vc4_create_shader_bo) 51 #define DRM_IOCTL_VC4_GET_HANG_STATE DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_GET_HANG_STATE, struct drm_vc4_get_hang_state) 52 #define DRM_IOCTL_VC4_GET_PARAM DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_GET_PARAM, struct drm_vc4_get_param) 53 #define DRM_IOCTL_VC4_SET_TILING DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_SET_TILING, struct drm_vc4_set_tiling) 54 #define DRM_IOCTL_VC4_GET_TILING DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_GET_TILING, struct drm_vc4_get_tiling) 55 #define DRM_IOCTL_VC4_LABEL_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_LABEL_BO, struct drm_vc4_label_bo) 56 57 struct drm_vc4_submit_rcl_surface { 58 __u32 hindex; /* Handle index, or ~0 if not present. */ 59 __u32 offset; /* Offset to start of buffer. */ 60 /* 61 * Bits for either render config (color_write) or load/store packet. 62 * Bits should all be 0 for MSAA load/stores. 63 */ 64 __u16 bits; 65 66 #define VC4_SUBMIT_RCL_SURFACE_READ_IS_FULL_RES (1 << 0) 67 __u16 flags; 68 }; 69 70 /** 71 * struct drm_vc4_submit_cl - ioctl argument for submitting commands to the 3D 72 * engine. 73 * 74 * Drivers typically use GPU BOs to store batchbuffers / command lists and 75 * their associated state. However, because the VC4 lacks an MMU, we have to 76 * do validation of memory accesses by the GPU commands. If we were to store 77 * our commands in BOs, we'd need to do uncached readback from them to do the 78 * validation process, which is too expensive. Instead, userspace accumulates 79 * commands and associated state in plain memory, then the kernel copies the 80 * data to its own address space, and then validates and stores it in a GPU 81 * BO. 82 */ 83 struct drm_vc4_submit_cl { 84 /* Pointer to the binner command list. 85 * 86 * This is the first set of commands executed, which runs the 87 * coordinate shader to determine where primitives land on the screen, 88 * then writes out the state updates and draw calls necessary per tile 89 * to the tile allocation BO. 90 */ 91 __u64 bin_cl; 92 93 /* Pointer to the shader records. 94 * 95 * Shader records are the structures read by the hardware that contain 96 * pointers to uniforms, shaders, and vertex attributes. The 97 * reference to the shader record has enough information to determine 98 * how many pointers are necessary (fixed number for shaders/uniforms, 99 * and an attribute count), so those BO indices into bo_handles are 100 * just stored as __u32s before each shader record passed in. 101 */ 102 __u64 shader_rec; 103 104 /* Pointer to uniform data and texture handles for the textures 105 * referenced by the shader. 106 * 107 * For each shader state record, there is a set of uniform data in the 108 * order referenced by the record (FS, VS, then CS). Each set of 109 * uniform data has a __u32 index into bo_handles per texture 110 * sample operation, in the order the QPU_W_TMUn_S writes appear in 111 * the program. Following the texture BO handle indices is the actual 112 * uniform data. 113 * 114 * The individual uniform state blocks don't have sizes passed in, 115 * because the kernel has to determine the sizes anyway during shader 116 * code validation. 117 */ 118 __u64 uniforms; 119 __u64 bo_handles; 120 121 /* Size in bytes of the binner command list. */ 122 __u32 bin_cl_size; 123 /* Size in bytes of the set of shader records. */ 124 __u32 shader_rec_size; 125 /* Number of shader records. 126 * 127 * This could just be computed from the contents of shader_records and 128 * the address bits of references to them from the bin CL, but it 129 * keeps the kernel from having to resize some allocations it makes. 130 */ 131 __u32 shader_rec_count; 132 /* Size in bytes of the uniform state. */ 133 __u32 uniforms_size; 134 135 /* Number of BO handles passed in (size is that times 4). */ 136 __u32 bo_handle_count; 137 138 /* RCL setup: */ 139 __u16 width; 140 __u16 height; 141 __u8 min_x_tile; 142 __u8 min_y_tile; 143 __u8 max_x_tile; 144 __u8 max_y_tile; 145 struct drm_vc4_submit_rcl_surface color_read; 146 struct drm_vc4_submit_rcl_surface color_write; 147 struct drm_vc4_submit_rcl_surface zs_read; 148 struct drm_vc4_submit_rcl_surface zs_write; 149 struct drm_vc4_submit_rcl_surface msaa_color_write; 150 struct drm_vc4_submit_rcl_surface msaa_zs_write; 151 __u32 clear_color[2]; 152 __u32 clear_z; 153 __u8 clear_s; 154 155 __u32 pad:24; 156 157 #define VC4_SUBMIT_CL_USE_CLEAR_COLOR (1 << 0) 158 __u32 flags; 159 160 /* Returned value of the seqno of this render job (for the 161 * wait ioctl). 162 */ 163 __u64 seqno; 164 }; 165 166 /** 167 * struct drm_vc4_wait_seqno - ioctl argument for waiting for 168 * DRM_VC4_SUBMIT_CL completion using its returned seqno. 169 * 170 * timeout_ns is the timeout in nanoseconds, where "0" means "don't 171 * block, just return the status." 172 */ 173 struct drm_vc4_wait_seqno { 174 __u64 seqno; 175 __u64 timeout_ns; 176 }; 177 178 /** 179 * struct drm_vc4_wait_bo - ioctl argument for waiting for 180 * completion of the last DRM_VC4_SUBMIT_CL on a BO. 181 * 182 * This is useful for cases where multiple processes might be 183 * rendering to a BO and you want to wait for all rendering to be 184 * completed. 185 */ 186 struct drm_vc4_wait_bo { 187 __u32 handle; 188 __u32 pad; 189 __u64 timeout_ns; 190 }; 191 192 /** 193 * struct drm_vc4_create_bo - ioctl argument for creating VC4 BOs. 194 * 195 * There are currently no values for the flags argument, but it may be 196 * used in a future extension. 197 */ 198 struct drm_vc4_create_bo { 199 __u32 size; 200 __u32 flags; 201 /** Returned GEM handle for the BO. */ 202 __u32 handle; 203 __u32 pad; 204 }; 205 206 /** 207 * struct drm_vc4_mmap_bo - ioctl argument for mapping VC4 BOs. 208 * 209 * This doesn't actually perform an mmap. Instead, it returns the 210 * offset you need to use in an mmap on the DRM device node. This 211 * means that tools like valgrind end up knowing about the mapped 212 * memory. 213 * 214 * There are currently no values for the flags argument, but it may be 215 * used in a future extension. 216 */ 217 struct drm_vc4_mmap_bo { 218 /** Handle for the object being mapped. */ 219 __u32 handle; 220 __u32 flags; 221 /** offset into the drm node to use for subsequent mmap call. */ 222 __u64 offset; 223 }; 224 225 /** 226 * struct drm_vc4_create_shader_bo - ioctl argument for creating VC4 227 * shader BOs. 228 * 229 * Since allowing a shader to be overwritten while it's also being 230 * executed from would allow privlege escalation, shaders must be 231 * created using this ioctl, and they can't be mmapped later. 232 */ 233 struct drm_vc4_create_shader_bo { 234 /* Size of the data argument. */ 235 __u32 size; 236 /* Flags, currently must be 0. */ 237 __u32 flags; 238 239 /* Pointer to the data. */ 240 __u64 data; 241 242 /** Returned GEM handle for the BO. */ 243 __u32 handle; 244 /* Pad, must be 0. */ 245 __u32 pad; 246 }; 247 248 struct drm_vc4_get_hang_state_bo { 249 __u32 handle; 250 __u32 paddr; 251 __u32 size; 252 __u32 pad; 253 }; 254 255 /** 256 * struct drm_vc4_hang_state - ioctl argument for collecting state 257 * from a GPU hang for analysis. 258 */ 259 struct drm_vc4_get_hang_state { 260 /** Pointer to array of struct drm_vc4_get_hang_state_bo. */ 261 __u64 bo; 262 /** 263 * On input, the size of the bo array. Output is the number 264 * of bos to be returned. 265 */ 266 __u32 bo_count; 267 268 __u32 start_bin, start_render; 269 270 __u32 ct0ca, ct0ea; 271 __u32 ct1ca, ct1ea; 272 __u32 ct0cs, ct1cs; 273 __u32 ct0ra0, ct1ra0; 274 275 __u32 bpca, bpcs; 276 __u32 bpoa, bpos; 277 278 __u32 vpmbase; 279 280 __u32 dbge; 281 __u32 fdbgo; 282 __u32 fdbgb; 283 __u32 fdbgr; 284 __u32 fdbgs; 285 __u32 errstat; 286 287 /* Pad that we may save more registers into in the future. */ 288 __u32 pad[16]; 289 }; 290 291 #define DRM_VC4_PARAM_V3D_IDENT0 0 292 #define DRM_VC4_PARAM_V3D_IDENT1 1 293 #define DRM_VC4_PARAM_V3D_IDENT2 2 294 #define DRM_VC4_PARAM_SUPPORTS_BRANCHES 3 295 #define DRM_VC4_PARAM_SUPPORTS_ETC1 4 296 #define DRM_VC4_PARAM_SUPPORTS_THREADED_FS 5 297 298 struct drm_vc4_get_param { 299 __u32 param; 300 __u32 pad; 301 __u64 value; 302 }; 303 304 struct drm_vc4_get_tiling { 305 __u32 handle; 306 __u32 flags; 307 __u64 modifier; 308 }; 309 310 struct drm_vc4_set_tiling { 311 __u32 handle; 312 __u32 flags; 313 __u64 modifier; 314 }; 315 316 /** 317 * struct drm_vc4_label_bo - Attach a name to a BO for debug purposes. 318 */ 319 struct drm_vc4_label_bo { 320 __u32 handle; 321 __u32 len; 322 __u64 name; 323 }; 324 325 #if defined(__cplusplus) 326 } 327 #endif 328 329 #endif /* _UAPI_VC4_DRM_H_ */ 330