1// SPDX-License-Identifier: GPL-2.0-only OR MIT 2/* Copyright (c) 2023 Imagination Technologies Ltd. */ 3 4#include "pvr_device.h" 5#include "pvr_rogue_fwif_stream.h" 6#include "pvr_stream.h" 7 8#include <linux/align.h> 9#include <linux/slab.h> 10#include <linux/types.h> 11#include <uapi/drm/pvr_drm.h> 12 13static __always_inline bool 14stream_def_is_supported(struct pvr_device *pvr_dev, const struct pvr_stream_def *stream_def) 15{ 16 if (stream_def->feature == PVR_FEATURE_NONE) 17 return true; 18 19 if (!(stream_def->feature & PVR_FEATURE_NOT) && 20 pvr_device_has_feature(pvr_dev, stream_def->feature)) { 21 return true; 22 } 23 24 if ((stream_def->feature & PVR_FEATURE_NOT) && 25 !pvr_device_has_feature(pvr_dev, stream_def->feature & ~PVR_FEATURE_NOT)) { 26 return true; 27 } 28 29 return false; 30} 31 32static int 33pvr_stream_get_data(u8 *stream, u32 *stream_offset, u32 stream_size, u32 data_size, u32 align_size, 34 void *dest) 35{ 36 *stream_offset = ALIGN(*stream_offset, align_size); 37 38 if ((*stream_offset + data_size) > stream_size) 39 return -EINVAL; 40 41 memcpy(dest, stream + *stream_offset, data_size); 42 43 (*stream_offset) += data_size; 44 45 return 0; 46} 47 48/** 49 * pvr_stream_process_1() - Process a single stream and fill destination structure 50 * @pvr_dev: Device pointer. 51 * @stream_def: Stream definition. 52 * @nr_entries: Number of entries in &stream_def. 53 * @stream: Pointer to stream. 54 * @stream_offset: Starting offset within stream. 55 * @stream_size: Size of input stream, in bytes. 56 * @dest: Pointer to destination structure. 57 * @dest_size: Size of destination structure. 58 * @stream_offset_out: Pointer to variable to write updated stream offset to. May be NULL. 59 * 60 * Returns: 61 * * 0 on success, or 62 * * -%EINVAL on malformed stream. 63 */ 64static int 65pvr_stream_process_1(struct pvr_device *pvr_dev, const struct pvr_stream_def *stream_def, 66 u32 nr_entries, u8 *stream, u32 stream_offset, u32 stream_size, 67 u8 *dest, u32 dest_size, u32 *stream_offset_out) 68{ 69 int err = 0; 70 u32 i; 71 72 for (i = 0; i < nr_entries; i++) { 73 if (stream_def[i].offset >= dest_size) { 74 err = -EINVAL; 75 break; 76 } 77 78 if (!stream_def_is_supported(pvr_dev, &stream_def[i])) 79 continue; 80 81 switch (stream_def[i].size) { 82 case PVR_STREAM_SIZE_8: 83 err = pvr_stream_get_data(stream, &stream_offset, stream_size, sizeof(u8), 84 sizeof(u8), dest + stream_def[i].offset); 85 if (err) 86 return err; 87 break; 88 89 case PVR_STREAM_SIZE_16: 90 err = pvr_stream_get_data(stream, &stream_offset, stream_size, sizeof(u16), 91 sizeof(u16), dest + stream_def[i].offset); 92 if (err) 93 return err; 94 break; 95 96 case PVR_STREAM_SIZE_32: 97 err = pvr_stream_get_data(stream, &stream_offset, stream_size, sizeof(u32), 98 sizeof(u32), dest + stream_def[i].offset); 99 if (err) 100 return err; 101 break; 102 103 case PVR_STREAM_SIZE_64: 104 err = pvr_stream_get_data(stream, &stream_offset, stream_size, sizeof(u64), 105 sizeof(u64), dest + stream_def[i].offset); 106 if (err) 107 return err; 108 break; 109 110 case PVR_STREAM_SIZE_ARRAY: 111 err = pvr_stream_get_data(stream, &stream_offset, stream_size, 112 stream_def[i].array_size, sizeof(u64), 113 dest + stream_def[i].offset); 114 if (err) 115 return err; 116 break; 117 } 118 } 119 120 if (stream_offset_out) 121 *stream_offset_out = stream_offset; 122 123 return err; 124} 125 126static int 127pvr_stream_process_ext_stream(struct pvr_device *pvr_dev, 128 const struct pvr_stream_cmd_defs *cmd_defs, void *ext_stream, 129 u32 stream_offset, u32 ext_stream_size, void *dest) 130{ 131 u32 musthave_masks[PVR_STREAM_EXTHDR_TYPE_MAX]; 132 u32 ext_header; 133 int err = 0; 134 u32 i; 135 136 /* Copy "must have" mask from device. We clear this as we process the stream. */ 137 memcpy(musthave_masks, pvr_dev->stream_musthave_quirks[cmd_defs->type], 138 sizeof(musthave_masks)); 139 140 do { 141 const struct pvr_stream_ext_header *header; 142 u32 type; 143 u32 data; 144 145 err = pvr_stream_get_data(ext_stream, &stream_offset, ext_stream_size, sizeof(u32), 146 sizeof(ext_header), &ext_header); 147 if (err) 148 return err; 149 150 type = (ext_header & PVR_STREAM_EXTHDR_TYPE_MASK) >> PVR_STREAM_EXTHDR_TYPE_SHIFT; 151 data = ext_header & PVR_STREAM_EXTHDR_DATA_MASK; 152 153 if (type >= cmd_defs->ext_nr_headers) 154 return -EINVAL; 155 156 header = &cmd_defs->ext_headers[type]; 157 if (data & ~header->valid_mask) 158 return -EINVAL; 159 160 musthave_masks[type] &= ~data; 161 162 for (i = 0; i < header->ext_streams_num; i++) { 163 const struct pvr_stream_ext_def *ext_def = &header->ext_streams[i]; 164 165 if (!(ext_header & ext_def->header_mask)) 166 continue; 167 168 if (!pvr_device_has_uapi_quirk(pvr_dev, ext_def->quirk)) 169 return -EINVAL; 170 171 err = pvr_stream_process_1(pvr_dev, ext_def->stream, ext_def->stream_len, 172 ext_stream, stream_offset, 173 ext_stream_size, dest, 174 cmd_defs->dest_size, &stream_offset); 175 if (err) 176 return err; 177 } 178 } while (ext_header & PVR_STREAM_EXTHDR_CONTINUATION); 179 180 /* 181 * Verify that "must have" mask is now zero. If it isn't then one of the "must have" quirks 182 * for this command was not present. 183 */ 184 for (i = 0; i < cmd_defs->ext_nr_headers; i++) { 185 if (musthave_masks[i]) 186 return -EINVAL; 187 } 188 189 return 0; 190} 191 192/** 193 * pvr_stream_process() - Build FW structure from stream 194 * @pvr_dev: Device pointer. 195 * @cmd_defs: Stream definition. 196 * @stream: Pointer to command stream. 197 * @stream_size: Size of command stream, in bytes. 198 * @dest_out: Pointer to destination buffer. 199 * 200 * Caller is responsible for freeing the output structure. 201 * 202 * Returns: 203 * * 0 on success, 204 * * -%ENOMEM on out of memory, or 205 * * -%EINVAL on malformed stream. 206 */ 207int 208pvr_stream_process(struct pvr_device *pvr_dev, const struct pvr_stream_cmd_defs *cmd_defs, 209 void *stream, u32 stream_size, void *dest_out) 210{ 211 u32 stream_offset = 0; 212 u32 main_stream_len; 213 u32 padding; 214 int err; 215 216 if (!stream || !stream_size) 217 return -EINVAL; 218 219 err = pvr_stream_get_data(stream, &stream_offset, stream_size, sizeof(u32), 220 sizeof(u32), &main_stream_len); 221 if (err) 222 return err; 223 224 /* 225 * u32 after stream length is padding to ensure u64 alignment, but may be used for expansion 226 * in the future. Verify it's zero. 227 */ 228 err = pvr_stream_get_data(stream, &stream_offset, stream_size, sizeof(u32), 229 sizeof(u32), &padding); 230 if (err) 231 return err; 232 233 if (main_stream_len < stream_offset || main_stream_len > stream_size || padding) 234 return -EINVAL; 235 236 err = pvr_stream_process_1(pvr_dev, cmd_defs->main_stream, cmd_defs->main_stream_len, 237 stream, stream_offset, main_stream_len, dest_out, 238 cmd_defs->dest_size, &stream_offset); 239 if (err) 240 return err; 241 242 if (stream_offset < stream_size) { 243 err = pvr_stream_process_ext_stream(pvr_dev, cmd_defs, stream, stream_offset, 244 stream_size, dest_out); 245 if (err) 246 return err; 247 } else { 248 u32 i; 249 250 /* 251 * If we don't have an extension stream then there must not be any "must have" 252 * quirks for this command. 253 */ 254 for (i = 0; i < cmd_defs->ext_nr_headers; i++) { 255 if (pvr_dev->stream_musthave_quirks[cmd_defs->type][i]) 256 return -EINVAL; 257 } 258 } 259 260 return 0; 261} 262 263/** 264 * pvr_stream_create_musthave_masks() - Create "must have" masks for streams based on current device 265 * quirks 266 * @pvr_dev: Device pointer. 267 */ 268void 269pvr_stream_create_musthave_masks(struct pvr_device *pvr_dev) 270{ 271 memset(pvr_dev->stream_musthave_quirks, 0, sizeof(pvr_dev->stream_musthave_quirks)); 272 273 if (pvr_device_has_uapi_quirk(pvr_dev, 47217)) 274 pvr_dev->stream_musthave_quirks[PVR_STREAM_TYPE_FRAG][0] |= 275 PVR_STREAM_EXTHDR_FRAG0_BRN47217; 276 277 if (pvr_device_has_uapi_quirk(pvr_dev, 49927)) { 278 pvr_dev->stream_musthave_quirks[PVR_STREAM_TYPE_GEOM][0] |= 279 PVR_STREAM_EXTHDR_GEOM0_BRN49927; 280 pvr_dev->stream_musthave_quirks[PVR_STREAM_TYPE_FRAG][0] |= 281 PVR_STREAM_EXTHDR_FRAG0_BRN49927; 282 pvr_dev->stream_musthave_quirks[PVR_STREAM_TYPE_COMPUTE][0] |= 283 PVR_STREAM_EXTHDR_COMPUTE0_BRN49927; 284 } 285} 286