Sujeev Dias | 8fc2600 | 2017-11-29 20:51:40 -0800 | [diff] [blame] | 1 | /* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved. |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #include <asm/dma-iommu.h> |
| 14 | #include <linux/atomic.h> |
| 15 | #include <linux/completion.h> |
| 16 | #include <linux/debugfs.h> |
| 17 | #include <linux/device.h> |
| 18 | #include <linux/dma-mapping.h> |
| 19 | #include <linux/dmaengine.h> |
| 20 | #include <linux/io.h> |
| 21 | #include <linux/iommu.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/interrupt.h> |
| 24 | #include <linux/ipc_logging.h> |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/of.h> |
| 28 | #include <linux/of_address.h> |
| 29 | #include <linux/of_dma.h> |
| 30 | #include <linux/of_irq.h> |
| 31 | #include <linux/platform_device.h> |
| 32 | #include <linux/scatterlist.h> |
| 33 | #include <linux/sched_clock.h> |
| 34 | #include <linux/slab.h> |
| 35 | #include <linux/vmalloc.h> |
| 36 | #include <asm/cacheflush.h> |
| 37 | #include <linux/msm_gpi.h> |
| 38 | #include "../dmaengine.h" |
| 39 | #include "../virt-dma.h" |
| 40 | #include "msm_gpi_mmio.h" |
| 41 | |
| 42 | /* global logging macros */ |
| 43 | #define GPI_LOG(gpi_dev, fmt, ...) do { \ |
| 44 | if (gpi_dev->klog_lvl != LOG_LVL_MASK_ALL) \ |
| 45 | dev_dbg(gpi_dev->dev, "%s: " fmt, __func__, ##__VA_ARGS__); \ |
| 46 | if (gpi_dev->ilctxt && gpi_dev->ipc_log_lvl != LOG_LVL_MASK_ALL) \ |
| 47 | ipc_log_string(gpi_dev->ilctxt, \ |
| 48 | "%s: " fmt, __func__, ##__VA_ARGS__); \ |
| 49 | } while (0) |
| 50 | #define GPI_ERR(gpi_dev, fmt, ...) do { \ |
| 51 | if (gpi_dev->klog_lvl >= LOG_LVL_ERROR) \ |
| 52 | dev_err(gpi_dev->dev, "%s: " fmt, __func__, ##__VA_ARGS__); \ |
| 53 | if (gpi_dev->ilctxt && gpi_dev->ipc_log_lvl >= LOG_LVL_ERROR) \ |
| 54 | ipc_log_string(gpi_dev->ilctxt, \ |
| 55 | "%s: " fmt, __func__, ##__VA_ARGS__); \ |
| 56 | } while (0) |
| 57 | |
| 58 | /* gpii specific logging macros */ |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 59 | #define GPII_INFO(gpii, ch, fmt, ...) do { \ |
| 60 | if (gpii->klog_lvl >= LOG_LVL_INFO) \ |
| 61 | pr_info("%s:%u:%s: " fmt, gpii->label, ch, \ |
| 62 | __func__, ##__VA_ARGS__); \ |
| 63 | if (gpii->ilctxt && gpii->ipc_log_lvl >= LOG_LVL_INFO) \ |
| 64 | ipc_log_string(gpii->ilctxt, \ |
| 65 | "ch:%u %s: " fmt, ch, \ |
| 66 | __func__, ##__VA_ARGS__); \ |
| 67 | } while (0) |
| 68 | #define GPII_ERR(gpii, ch, fmt, ...) do { \ |
| 69 | if (gpii->klog_lvl >= LOG_LVL_ERROR) \ |
| 70 | pr_err("%s:%u:%s: " fmt, gpii->label, ch, \ |
| 71 | __func__, ##__VA_ARGS__); \ |
| 72 | if (gpii->ilctxt && gpii->ipc_log_lvl >= LOG_LVL_ERROR) \ |
| 73 | ipc_log_string(gpii->ilctxt, \ |
| 74 | "ch:%u %s: " fmt, ch, \ |
| 75 | __func__, ##__VA_ARGS__); \ |
| 76 | } while (0) |
| 77 | #define GPII_CRITIC(gpii, ch, fmt, ...) do { \ |
| 78 | if (gpii->klog_lvl >= LOG_LVL_CRITICAL) \ |
| 79 | pr_err("%s:%u:%s: " fmt, gpii->label, ch, \ |
| 80 | __func__, ##__VA_ARGS__); \ |
| 81 | if (gpii->ilctxt && gpii->ipc_log_lvl >= LOG_LVL_CRITICAL) \ |
| 82 | ipc_log_string(gpii->ilctxt, \ |
| 83 | "ch:%u %s: " fmt, ch, \ |
| 84 | __func__, ##__VA_ARGS__); \ |
| 85 | } while (0) |
| 86 | |
| 87 | enum DEBUG_LOG_LVL { |
| 88 | LOG_LVL_MASK_ALL, |
| 89 | LOG_LVL_CRITICAL, |
| 90 | LOG_LVL_ERROR, |
| 91 | LOG_LVL_INFO, |
| 92 | LOG_LVL_VERBOSE, |
| 93 | LOG_LVL_REG_ACCESS, |
| 94 | }; |
| 95 | |
| 96 | enum EV_PRIORITY { |
| 97 | EV_PRIORITY_ISR, |
| 98 | EV_PRIORITY_TASKLET, |
| 99 | }; |
| 100 | |
| 101 | #define GPI_DMA_DRV_NAME "gpi_dma" |
| 102 | #define DEFAULT_KLOG_LVL (LOG_LVL_CRITICAL) |
| 103 | #ifdef CONFIG_QCOM_GPI_DMA_DEBUG |
| 104 | #define DEFAULT_IPC_LOG_LVL (LOG_LVL_VERBOSE) |
| 105 | #define IPC_LOG_PAGES (40) |
| 106 | #define GPI_DBG_LOG_SIZE (SZ_1K) /* size must be power of 2 */ |
Sujeev Dias | 5fa1d9f | 2017-11-17 15:22:34 -0800 | [diff] [blame] | 107 | #define CMD_TIMEOUT_MS (1000) |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 108 | #define GPII_REG(gpii, ch, fmt, ...) do { \ |
| 109 | if (gpii->klog_lvl >= LOG_LVL_REG_ACCESS) \ |
| 110 | pr_info("%s:%u:%s: " fmt, gpii->label, \ |
| 111 | ch, __func__, ##__VA_ARGS__); \ |
| 112 | if (gpii->ilctxt && gpii->ipc_log_lvl >= LOG_LVL_REG_ACCESS) \ |
| 113 | ipc_log_string(gpii->ilctxt, \ |
| 114 | "ch:%u %s: " fmt, ch, \ |
| 115 | __func__, ##__VA_ARGS__); \ |
| 116 | } while (0) |
| 117 | #define GPII_VERB(gpii, ch, fmt, ...) do { \ |
| 118 | if (gpii->klog_lvl >= LOG_LVL_VERBOSE) \ |
| 119 | pr_info("%s:%u:%s: " fmt, gpii->label, \ |
| 120 | ch, __func__, ##__VA_ARGS__); \ |
| 121 | if (gpii->ilctxt && gpii->ipc_log_lvl >= LOG_LVL_VERBOSE) \ |
| 122 | ipc_log_string(gpii->ilctxt, \ |
| 123 | "ch:%u %s: " fmt, ch, \ |
| 124 | __func__, ##__VA_ARGS__); \ |
| 125 | } while (0) |
| 126 | |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 127 | #else |
| 128 | #define IPC_LOG_PAGES (2) |
| 129 | #define GPI_DBG_LOG_SIZE (0) /* size must be power of 2 */ |
| 130 | #define DEFAULT_IPC_LOG_LVL (LOG_LVL_ERROR) |
Sujeev Dias | 5fa1d9f | 2017-11-17 15:22:34 -0800 | [diff] [blame] | 131 | #define CMD_TIMEOUT_MS (250) |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 132 | /* verbose and register logging are disabled if !debug */ |
| 133 | #define GPII_REG(gpii, ch, fmt, ...) |
| 134 | #define GPII_VERB(gpii, ch, fmt, ...) |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 135 | #endif |
| 136 | |
| 137 | #define GPI_LABEL_SIZE (256) |
| 138 | #define GPI_DBG_COMMON (99) |
| 139 | #define MAX_CHANNELS_PER_GPII (2) |
Sujeev Dias | dfe09e1 | 2017-08-31 18:31:04 -0700 | [diff] [blame] | 140 | #define GPI_TX_CHAN (0) |
| 141 | #define GPI_RX_CHAN (1) |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 142 | #define STATE_IGNORE (U32_MAX) |
Sujeev Dias | dfe09e1 | 2017-08-31 18:31:04 -0700 | [diff] [blame] | 143 | #define REQ_OF_DMA_ARGS (5) /* # of arguments required from client */ |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 144 | |
| 145 | struct __packed gpi_error_log_entry { |
| 146 | u32 routine : 4; |
| 147 | u32 type : 4; |
| 148 | u32 reserved0 : 4; |
| 149 | u32 code : 4; |
| 150 | u32 reserved1 : 3; |
| 151 | u32 chid : 5; |
| 152 | u32 reserved2 : 1; |
| 153 | u32 chtype : 1; |
| 154 | u32 ee : 1; |
| 155 | }; |
| 156 | |
| 157 | struct __packed xfer_compl_event { |
| 158 | u64 ptr; |
| 159 | u32 length : 24; |
| 160 | u8 code; |
| 161 | u16 status; |
| 162 | u8 type; |
| 163 | u8 chid; |
| 164 | }; |
| 165 | |
| 166 | struct __packed immediate_data_event { |
| 167 | u8 data_bytes[8]; |
| 168 | u8 length : 4; |
| 169 | u8 resvd : 4; |
| 170 | u16 tre_index; |
| 171 | u8 code; |
| 172 | u16 status; |
| 173 | u8 type; |
| 174 | u8 chid; |
| 175 | }; |
| 176 | |
| 177 | struct __packed qup_notif_event { |
| 178 | u32 status; |
| 179 | u32 time; |
| 180 | u32 count :24; |
| 181 | u8 resvd; |
| 182 | u16 resvd1; |
| 183 | u8 type; |
| 184 | u8 chid; |
| 185 | }; |
| 186 | |
| 187 | struct __packed gpi_ere { |
| 188 | u32 dword[4]; |
| 189 | }; |
| 190 | |
| 191 | enum GPI_EV_TYPE { |
| 192 | XFER_COMPLETE_EV_TYPE = 0x22, |
| 193 | IMMEDIATE_DATA_EV_TYPE = 0x30, |
| 194 | QUP_NOTIF_EV_TYPE = 0x31, |
| 195 | STALE_EV_TYPE = 0xFF, |
| 196 | }; |
| 197 | |
| 198 | union __packed gpi_event { |
| 199 | struct __packed xfer_compl_event xfer_compl_event; |
| 200 | struct __packed immediate_data_event immediate_data_event; |
| 201 | struct __packed qup_notif_event qup_notif_event; |
| 202 | struct __packed gpi_ere gpi_ere; |
| 203 | }; |
| 204 | |
| 205 | enum gpii_irq_settings { |
| 206 | DEFAULT_IRQ_SETTINGS, |
| 207 | MASK_IEOB_SETTINGS, |
| 208 | }; |
| 209 | |
| 210 | enum gpi_ev_state { |
| 211 | DEFAULT_EV_CH_STATE = 0, |
| 212 | EV_STATE_NOT_ALLOCATED = DEFAULT_EV_CH_STATE, |
| 213 | EV_STATE_ALLOCATED, |
| 214 | MAX_EV_STATES |
| 215 | }; |
| 216 | |
| 217 | static const char *const gpi_ev_state_str[MAX_EV_STATES] = { |
| 218 | [EV_STATE_NOT_ALLOCATED] = "NOT ALLOCATED", |
| 219 | [EV_STATE_ALLOCATED] = "ALLOCATED", |
| 220 | }; |
| 221 | |
| 222 | #define TO_GPI_EV_STATE_STR(state) ((state >= MAX_EV_STATES) ? \ |
| 223 | "INVALID" : gpi_ev_state_str[state]) |
| 224 | |
| 225 | enum gpi_ch_state { |
| 226 | DEFAULT_CH_STATE = 0x0, |
| 227 | CH_STATE_NOT_ALLOCATED = DEFAULT_CH_STATE, |
| 228 | CH_STATE_ALLOCATED = 0x1, |
| 229 | CH_STATE_STARTED = 0x2, |
| 230 | CH_STATE_STOPPED = 0x3, |
| 231 | CH_STATE_STOP_IN_PROC = 0x4, |
| 232 | CH_STATE_ERROR = 0xf, |
| 233 | MAX_CH_STATES |
| 234 | }; |
| 235 | |
| 236 | static const char *const gpi_ch_state_str[MAX_CH_STATES] = { |
| 237 | [CH_STATE_NOT_ALLOCATED] = "NOT ALLOCATED", |
| 238 | [CH_STATE_ALLOCATED] = "ALLOCATED", |
| 239 | [CH_STATE_STARTED] = "STARTED", |
| 240 | [CH_STATE_STOPPED] = "STOPPED", |
| 241 | [CH_STATE_STOP_IN_PROC] = "STOP IN PROCESS", |
| 242 | [CH_STATE_ERROR] = "ERROR", |
| 243 | }; |
| 244 | |
| 245 | #define TO_GPI_CH_STATE_STR(state) ((state >= MAX_CH_STATES) ? \ |
| 246 | "INVALID" : gpi_ch_state_str[state]) |
| 247 | |
| 248 | enum gpi_cmd { |
| 249 | GPI_CH_CMD_BEGIN, |
| 250 | GPI_CH_CMD_ALLOCATE = GPI_CH_CMD_BEGIN, |
| 251 | GPI_CH_CMD_START, |
| 252 | GPI_CH_CMD_STOP, |
| 253 | GPI_CH_CMD_RESET, |
| 254 | GPI_CH_CMD_DE_ALLOC, |
| 255 | GPI_CH_CMD_UART_SW_STALE, |
| 256 | GPI_CH_CMD_UART_RFR_READY, |
| 257 | GPI_CH_CMD_UART_RFR_NOT_READY, |
| 258 | GPI_CH_CMD_END = GPI_CH_CMD_UART_RFR_NOT_READY, |
| 259 | GPI_EV_CMD_BEGIN, |
| 260 | GPI_EV_CMD_ALLOCATE = GPI_EV_CMD_BEGIN, |
| 261 | GPI_EV_CMD_RESET, |
| 262 | GPI_EV_CMD_DEALLOC, |
| 263 | GPI_EV_CMD_END = GPI_EV_CMD_DEALLOC, |
| 264 | GPI_MAX_CMD, |
| 265 | }; |
| 266 | |
| 267 | #define IS_CHAN_CMD(cmd) (cmd <= GPI_CH_CMD_END) |
| 268 | |
| 269 | static const char *const gpi_cmd_str[GPI_MAX_CMD] = { |
| 270 | [GPI_CH_CMD_ALLOCATE] = "CH ALLOCATE", |
| 271 | [GPI_CH_CMD_START] = "CH START", |
| 272 | [GPI_CH_CMD_STOP] = "CH STOP", |
| 273 | [GPI_CH_CMD_RESET] = "CH_RESET", |
| 274 | [GPI_CH_CMD_DE_ALLOC] = "DE ALLOC", |
| 275 | [GPI_CH_CMD_UART_SW_STALE] = "UART SW STALE", |
| 276 | [GPI_CH_CMD_UART_RFR_READY] = "UART RFR READY", |
| 277 | [GPI_CH_CMD_UART_RFR_NOT_READY] = "UART RFR NOT READY", |
| 278 | [GPI_EV_CMD_ALLOCATE] = "EV ALLOCATE", |
| 279 | [GPI_EV_CMD_RESET] = "EV RESET", |
| 280 | [GPI_EV_CMD_DEALLOC] = "EV DEALLOC", |
| 281 | }; |
| 282 | |
| 283 | #define TO_GPI_CMD_STR(cmd) ((cmd >= GPI_MAX_CMD) ? "INVALID" : \ |
| 284 | gpi_cmd_str[cmd]) |
| 285 | |
| 286 | static const char *const gpi_cb_event_str[MSM_GPI_QUP_MAX_EVENT] = { |
| 287 | [MSM_GPI_QUP_NOTIFY] = "NOTIFY", |
| 288 | [MSM_GPI_QUP_ERROR] = "GLOBAL ERROR", |
| 289 | [MSM_GPI_QUP_CH_ERROR] = "CHAN ERROR", |
| 290 | [MSM_GPI_QUP_PENDING_EVENT] = "PENDING EVENT", |
| 291 | [MSM_GPI_QUP_EOT_DESC_MISMATCH] = "EOT/DESC MISMATCH", |
| 292 | [MSM_GPI_QUP_SW_ERROR] = "SW ERROR", |
| 293 | }; |
| 294 | |
| 295 | #define TO_GPI_CB_EVENT_STR(event) ((event >= MSM_GPI_QUP_MAX_EVENT) ? \ |
| 296 | "INVALID" : gpi_cb_event_str[event]) |
| 297 | |
| 298 | enum se_protocol { |
| 299 | SE_PROTOCOL_SPI = 1, |
| 300 | SE_PROTOCOL_UART = 2, |
| 301 | SE_PROTOCOL_I2C = 3, |
| 302 | SE_MAX_PROTOCOL |
| 303 | }; |
| 304 | |
| 305 | /* |
| 306 | * @DISABLE_STATE: no register access allowed |
| 307 | * @CONFIG_STATE: client has configured the channel |
| 308 | * @PREP_HARDWARE: register access is allowed |
| 309 | * however, no processing EVENTS |
| 310 | * @ACTIVE_STATE: channels are fully operational |
| 311 | * @PREPARE_TERIMNATE: graceful termination of channels |
| 312 | * register access is allowed |
| 313 | * @PAUSE_STATE: channels are active, but not processing any events |
| 314 | */ |
| 315 | enum gpi_pm_state { |
| 316 | DISABLE_STATE, |
| 317 | CONFIG_STATE, |
| 318 | PREPARE_HARDWARE, |
| 319 | ACTIVE_STATE, |
| 320 | PREPARE_TERMINATE, |
| 321 | PAUSE_STATE, |
| 322 | MAX_PM_STATE |
| 323 | }; |
| 324 | |
| 325 | #define REG_ACCESS_VALID(pm_state) (pm_state >= PREPARE_HARDWARE) |
| 326 | |
| 327 | static const char *const gpi_pm_state_str[MAX_PM_STATE] = { |
| 328 | [DISABLE_STATE] = "DISABLE", |
| 329 | [CONFIG_STATE] = "CONFIG", |
| 330 | [PREPARE_HARDWARE] = "PREPARE HARDWARE", |
| 331 | [ACTIVE_STATE] = "ACTIVE", |
| 332 | [PREPARE_TERMINATE] = "PREPARE TERMINATE", |
| 333 | [PAUSE_STATE] = "PAUSE", |
| 334 | }; |
| 335 | |
| 336 | #define TO_GPI_PM_STR(state) ((state >= MAX_PM_STATE) ? \ |
| 337 | "INVALID" : gpi_pm_state_str[state]) |
| 338 | |
| 339 | static const struct { |
| 340 | enum gpi_cmd gpi_cmd; |
| 341 | u32 opcode; |
| 342 | u32 state; |
| 343 | u32 timeout_ms; |
| 344 | } gpi_cmd_info[GPI_MAX_CMD] = { |
| 345 | { |
| 346 | GPI_CH_CMD_ALLOCATE, |
| 347 | GPI_GPII_n_CH_CMD_ALLOCATE, |
| 348 | CH_STATE_ALLOCATED, |
| 349 | CMD_TIMEOUT_MS, |
| 350 | }, |
| 351 | { |
| 352 | GPI_CH_CMD_START, |
| 353 | GPI_GPII_n_CH_CMD_START, |
| 354 | CH_STATE_STARTED, |
| 355 | CMD_TIMEOUT_MS, |
| 356 | }, |
| 357 | { |
| 358 | GPI_CH_CMD_STOP, |
| 359 | GPI_GPII_n_CH_CMD_STOP, |
| 360 | CH_STATE_STOPPED, |
| 361 | CMD_TIMEOUT_MS, |
| 362 | }, |
| 363 | { |
| 364 | GPI_CH_CMD_RESET, |
| 365 | GPI_GPII_n_CH_CMD_RESET, |
| 366 | CH_STATE_ALLOCATED, |
| 367 | CMD_TIMEOUT_MS, |
| 368 | }, |
| 369 | { |
| 370 | GPI_CH_CMD_DE_ALLOC, |
| 371 | GPI_GPII_n_CH_CMD_DE_ALLOC, |
| 372 | CH_STATE_NOT_ALLOCATED, |
| 373 | CMD_TIMEOUT_MS, |
| 374 | }, |
| 375 | { |
| 376 | GPI_CH_CMD_UART_SW_STALE, |
| 377 | GPI_GPII_n_CH_CMD_UART_SW_STALE, |
| 378 | STATE_IGNORE, |
| 379 | CMD_TIMEOUT_MS, |
| 380 | }, |
| 381 | { |
| 382 | GPI_CH_CMD_UART_RFR_READY, |
| 383 | GPI_GPII_n_CH_CMD_UART_RFR_READY, |
| 384 | STATE_IGNORE, |
| 385 | CMD_TIMEOUT_MS, |
| 386 | }, |
| 387 | { |
| 388 | GPI_CH_CMD_UART_RFR_NOT_READY, |
| 389 | GPI_GPII_n_CH_CMD_UART_RFR_NOT_READY, |
| 390 | STATE_IGNORE, |
| 391 | CMD_TIMEOUT_MS, |
| 392 | }, |
| 393 | { |
| 394 | GPI_EV_CMD_ALLOCATE, |
| 395 | GPI_GPII_n_EV_CH_CMD_ALLOCATE, |
| 396 | EV_STATE_ALLOCATED, |
| 397 | CMD_TIMEOUT_MS, |
| 398 | }, |
| 399 | { |
| 400 | GPI_EV_CMD_RESET, |
| 401 | GPI_GPII_n_EV_CH_CMD_RESET, |
| 402 | EV_STATE_ALLOCATED, |
| 403 | CMD_TIMEOUT_MS, |
| 404 | }, |
| 405 | { |
| 406 | GPI_EV_CMD_DEALLOC, |
| 407 | GPI_GPII_n_EV_CH_CMD_DE_ALLOC, |
| 408 | EV_STATE_NOT_ALLOCATED, |
| 409 | CMD_TIMEOUT_MS, |
| 410 | }, |
| 411 | }; |
| 412 | |
| 413 | struct gpi_ring { |
| 414 | void *pre_aligned; |
| 415 | size_t alloc_size; |
| 416 | phys_addr_t phys_addr; |
| 417 | dma_addr_t dma_handle; |
| 418 | void *base; |
| 419 | void *wp; |
| 420 | void *rp; |
| 421 | u32 len; |
| 422 | u32 el_size; |
| 423 | u32 elements; |
| 424 | bool configured; |
| 425 | }; |
| 426 | |
| 427 | struct sg_tre { |
| 428 | void *ptr; |
| 429 | void *wp; /* store chan wp for debugging */ |
| 430 | }; |
| 431 | |
| 432 | struct gpi_dbg_log { |
| 433 | void *addr; |
| 434 | u64 time; |
| 435 | u32 val; |
| 436 | bool read; |
| 437 | }; |
| 438 | |
| 439 | struct gpi_dev { |
| 440 | struct dma_device dma_device; |
| 441 | struct device *dev; |
| 442 | struct resource *res; |
| 443 | void __iomem *regs; |
| 444 | u32 max_gpii; /* maximum # of gpii instances available per gpi block */ |
| 445 | u32 gpii_mask; /* gpii instances available for apps */ |
| 446 | u32 ev_factor; /* ev ring length factor */ |
Sujeev Dias | 6948421 | 2017-08-31 10:06:53 -0700 | [diff] [blame] | 447 | u32 smmu_cfg; |
| 448 | dma_addr_t iova_base; |
| 449 | size_t iova_size; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 450 | struct gpii *gpiis; |
| 451 | void *ilctxt; |
| 452 | u32 ipc_log_lvl; |
| 453 | u32 klog_lvl; |
| 454 | struct dentry *dentry; |
| 455 | }; |
| 456 | |
| 457 | struct gpii_chan { |
| 458 | struct virt_dma_chan vc; |
| 459 | u32 chid; |
| 460 | u32 seid; |
| 461 | enum se_protocol protocol; |
| 462 | enum EV_PRIORITY priority; /* comes from clients DT node */ |
| 463 | struct gpii *gpii; |
| 464 | enum gpi_ch_state ch_state; |
| 465 | enum gpi_pm_state pm_state; |
| 466 | void __iomem *ch_cntxt_base_reg; |
| 467 | void __iomem *ch_cntxt_db_reg; |
| 468 | void __iomem *ch_ring_base_lsb_reg, |
| 469 | *ch_ring_rp_lsb_reg, |
| 470 | *ch_ring_wp_lsb_reg; |
| 471 | void __iomem *ch_cmd_reg; |
| 472 | u32 req_tres; /* # of tre's client requested */ |
| 473 | u32 dir; |
| 474 | struct gpi_ring ch_ring; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 475 | struct gpi_client_info client_info; |
| 476 | }; |
| 477 | |
| 478 | struct gpii { |
| 479 | u32 gpii_id; |
| 480 | struct gpii_chan gpii_chan[MAX_CHANNELS_PER_GPII]; |
| 481 | struct gpi_dev *gpi_dev; |
| 482 | enum EV_PRIORITY ev_priority; |
| 483 | enum se_protocol protocol; |
| 484 | int irq; |
| 485 | void __iomem *regs; /* points to gpi top */ |
| 486 | void __iomem *ev_cntxt_base_reg; |
| 487 | void __iomem *ev_cntxt_db_reg; |
| 488 | void __iomem *ev_ring_base_lsb_reg, |
| 489 | *ev_ring_rp_lsb_reg, |
| 490 | *ev_ring_wp_lsb_reg; |
| 491 | void __iomem *ev_cmd_reg; |
| 492 | void __iomem *ieob_src_reg; |
| 493 | void __iomem *ieob_clr_reg; |
| 494 | struct mutex ctrl_lock; |
| 495 | enum gpi_ev_state ev_state; |
| 496 | bool configured_irq; |
| 497 | enum gpi_pm_state pm_state; |
| 498 | rwlock_t pm_lock; |
| 499 | struct gpi_ring ev_ring; |
| 500 | struct tasklet_struct ev_task; /* event processing tasklet */ |
| 501 | struct completion cmd_completion; |
| 502 | enum gpi_cmd gpi_cmd; |
| 503 | u32 cntxt_type_irq_msk; |
| 504 | void *ilctxt; |
| 505 | u32 ipc_log_lvl; |
| 506 | u32 klog_lvl; |
| 507 | struct gpi_dbg_log dbg_log[GPI_DBG_LOG_SIZE]; |
| 508 | atomic_t dbg_index; |
| 509 | char label[GPI_LABEL_SIZE]; |
| 510 | struct dentry *dentry; |
| 511 | }; |
| 512 | |
| 513 | struct gpi_desc { |
| 514 | struct virt_dma_desc vd; |
| 515 | void *wp; /* points to TRE last queued during issue_pending */ |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 516 | void *db; /* DB register to program */ |
| 517 | struct gpii_chan *gpii_chan; |
| 518 | }; |
| 519 | |
Sujeev Dias | 6948421 | 2017-08-31 10:06:53 -0700 | [diff] [blame] | 520 | #define GPI_SMMU_ATTACH BIT(0) |
| 521 | #define GPI_SMMU_S1_BYPASS BIT(1) |
| 522 | #define GPI_SMMU_FAST BIT(2) |
| 523 | #define GPI_SMMU_ATOMIC BIT(3) |
| 524 | |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 525 | const u32 GPII_CHAN_DIR[MAX_CHANNELS_PER_GPII] = { |
| 526 | GPI_CHTYPE_DIR_OUT, GPI_CHTYPE_DIR_IN |
| 527 | }; |
| 528 | |
| 529 | struct dentry *pdentry; |
| 530 | static irqreturn_t gpi_handle_irq(int irq, void *data); |
| 531 | static void gpi_ring_recycle_ev_element(struct gpi_ring *ring); |
| 532 | static int gpi_ring_add_element(struct gpi_ring *ring, void **wp); |
| 533 | static void gpi_process_events(struct gpii *gpii); |
| 534 | |
| 535 | static inline struct gpii_chan *to_gpii_chan(struct dma_chan *dma_chan) |
| 536 | { |
| 537 | return container_of(dma_chan, struct gpii_chan, vc.chan); |
| 538 | } |
| 539 | |
| 540 | static inline struct gpi_desc *to_gpi_desc(struct virt_dma_desc *vd) |
| 541 | { |
| 542 | return container_of(vd, struct gpi_desc, vd); |
| 543 | } |
| 544 | |
| 545 | static inline phys_addr_t to_physical(const struct gpi_ring *const ring, |
| 546 | void *addr) |
| 547 | { |
| 548 | return ring->phys_addr + (addr - ring->base); |
| 549 | } |
| 550 | |
| 551 | static inline void *to_virtual(const struct gpi_ring *const ring, |
| 552 | phys_addr_t addr) |
| 553 | { |
| 554 | return ring->base + (addr - ring->phys_addr); |
| 555 | } |
| 556 | |
| 557 | #ifdef CONFIG_QCOM_GPI_DMA_DEBUG |
| 558 | static inline u32 gpi_read_reg(struct gpii *gpii, void __iomem *addr) |
| 559 | { |
| 560 | u64 time = sched_clock(); |
| 561 | unsigned int index = atomic_inc_return(&gpii->dbg_index) - 1; |
Siva Kumar Akkireddi | 15fb394 | 2018-08-02 13:33:35 +0530 | [diff] [blame] | 562 | unsigned long offset = addr - gpii->regs; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 563 | u32 val; |
| 564 | |
| 565 | val = readl_relaxed(addr); |
| 566 | index &= (GPI_DBG_LOG_SIZE - 1); |
| 567 | (gpii->dbg_log + index)->addr = addr; |
| 568 | (gpii->dbg_log + index)->time = time; |
| 569 | (gpii->dbg_log + index)->val = val; |
| 570 | (gpii->dbg_log + index)->read = true; |
| 571 | GPII_REG(gpii, GPI_DBG_COMMON, "offset:0x%lx val:0x%x\n", |
Siva Kumar Akkireddi | 15fb394 | 2018-08-02 13:33:35 +0530 | [diff] [blame] | 572 | offset, val); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 573 | return val; |
| 574 | } |
| 575 | static inline void gpi_write_reg(struct gpii *gpii, void __iomem *addr, u32 val) |
| 576 | { |
| 577 | u64 time = sched_clock(); |
| 578 | unsigned int index = atomic_inc_return(&gpii->dbg_index) - 1; |
Siva Kumar Akkireddi | 15fb394 | 2018-08-02 13:33:35 +0530 | [diff] [blame] | 579 | unsigned long offset = addr - gpii->regs; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 580 | |
| 581 | index &= (GPI_DBG_LOG_SIZE - 1); |
| 582 | (gpii->dbg_log + index)->addr = addr; |
| 583 | (gpii->dbg_log + index)->time = time; |
| 584 | (gpii->dbg_log + index)->val = val; |
| 585 | (gpii->dbg_log + index)->read = false; |
| 586 | |
| 587 | GPII_REG(gpii, GPI_DBG_COMMON, "offset:0x%lx val:0x%x\n", |
Siva Kumar Akkireddi | 15fb394 | 2018-08-02 13:33:35 +0530 | [diff] [blame] | 588 | offset, val); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 589 | writel_relaxed(val, addr); |
| 590 | } |
| 591 | #else |
| 592 | static inline u32 gpi_read_reg(struct gpii *gpii, void __iomem *addr) |
| 593 | { |
| 594 | u32 val = readl_relaxed(addr); |
| 595 | |
| 596 | GPII_REG(gpii, GPI_DBG_COMMON, "offset:0x%lx val:0x%x\n", |
| 597 | addr - gpii->regs, val); |
| 598 | return val; |
| 599 | } |
| 600 | static inline void gpi_write_reg(struct gpii *gpii, void __iomem *addr, u32 val) |
| 601 | { |
| 602 | GPII_REG(gpii, GPI_DBG_COMMON, "offset:0x%lx val:0x%x\n", |
| 603 | addr - gpii->regs, val); |
| 604 | writel_relaxed(val, addr); |
| 605 | } |
| 606 | #endif |
| 607 | |
| 608 | /* gpi_write_reg_field - write to specific bit field */ |
| 609 | static inline void gpi_write_reg_field(struct gpii *gpii, |
| 610 | void __iomem *addr, |
| 611 | u32 mask, |
| 612 | u32 shift, |
| 613 | u32 val) |
| 614 | { |
| 615 | u32 tmp = gpi_read_reg(gpii, addr); |
| 616 | |
| 617 | tmp &= ~mask; |
| 618 | val = tmp | ((val << shift) & mask); |
| 619 | gpi_write_reg(gpii, addr, val); |
| 620 | } |
| 621 | |
| 622 | static void gpi_disable_interrupts(struct gpii *gpii) |
| 623 | { |
| 624 | struct { |
| 625 | u32 offset; |
| 626 | u32 mask; |
| 627 | u32 shift; |
| 628 | u32 val; |
| 629 | } default_reg[] = { |
| 630 | { |
| 631 | GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_OFFS |
| 632 | (gpii->gpii_id), |
| 633 | GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_BMSK, |
| 634 | GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_SHFT, |
| 635 | 0, |
| 636 | }, |
| 637 | { |
| 638 | GPI_GPII_n_CNTXT_SRC_IEOB_IRQ_MSK_OFFS |
| 639 | (gpii->gpii_id), |
| 640 | GPI_GPII_n_CNTXT_SRC_IEOB_IRQ_MSK_BMSK, |
| 641 | GPI_GPII_n_CNTXT_SRC_IEOB_IRQ_MSK_SHFT, |
| 642 | 0, |
| 643 | }, |
| 644 | { |
| 645 | GPI_GPII_n_CNTXT_SRC_CH_IRQ_MSK_OFFS |
| 646 | (gpii->gpii_id), |
| 647 | GPI_GPII_n_CNTXT_SRC_CH_IRQ_MSK_BMSK, |
| 648 | GPI_GPII_n_CNTXT_SRC_CH_IRQ_MSK_SHFT, |
| 649 | 0, |
| 650 | }, |
| 651 | { |
| 652 | GPI_GPII_n_CNTXT_SRC_EV_CH_IRQ_MSK_OFFS |
| 653 | (gpii->gpii_id), |
| 654 | GPI_GPII_n_CNTXT_SRC_EV_CH_IRQ_MSK_BMSK, |
| 655 | GPI_GPII_n_CNTXT_SRC_EV_CH_IRQ_MSK_SHFT, |
| 656 | 0, |
| 657 | }, |
| 658 | { |
| 659 | GPI_GPII_n_CNTXT_GLOB_IRQ_EN_OFFS |
| 660 | (gpii->gpii_id), |
| 661 | GPI_GPII_n_CNTXT_GLOB_IRQ_EN_BMSK, |
| 662 | GPI_GPII_n_CNTXT_GLOB_IRQ_EN_SHFT, |
| 663 | 0, |
| 664 | }, |
| 665 | { |
| 666 | GPI_GPII_n_CNTXT_GPII_IRQ_EN_OFFS |
| 667 | (gpii->gpii_id), |
| 668 | GPI_GPII_n_CNTXT_GPII_IRQ_EN_BMSK, |
| 669 | GPI_GPII_n_CNTXT_GPII_IRQ_EN_SHFT, |
| 670 | 0, |
| 671 | }, |
| 672 | { |
| 673 | GPI_GPII_n_CNTXT_INTSET_OFFS |
| 674 | (gpii->gpii_id), |
| 675 | GPI_GPII_n_CNTXT_INTSET_BMSK, |
| 676 | GPI_GPII_n_CNTXT_INTSET_SHFT, |
| 677 | 0, |
| 678 | }, |
| 679 | { 0 }, |
| 680 | }; |
| 681 | int i; |
| 682 | |
| 683 | for (i = 0; default_reg[i].offset; i++) |
| 684 | gpi_write_reg_field(gpii, gpii->regs + |
| 685 | default_reg[i].offset, |
| 686 | default_reg[i].mask, |
| 687 | default_reg[i].shift, |
| 688 | default_reg[i].val); |
| 689 | gpii->cntxt_type_irq_msk = 0; |
| 690 | devm_free_irq(gpii->gpi_dev->dev, gpii->irq, gpii); |
| 691 | gpii->configured_irq = false; |
| 692 | } |
| 693 | |
| 694 | /* configure and enable interrupts */ |
| 695 | static int gpi_config_interrupts(struct gpii *gpii, |
| 696 | enum gpii_irq_settings settings, |
| 697 | bool mask) |
| 698 | { |
| 699 | int ret; |
| 700 | int i; |
| 701 | const u32 def_type = (GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_GENERAL | |
| 702 | GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_IEOB | |
| 703 | GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_GLOB | |
| 704 | GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_EV_CTRL | |
| 705 | GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_CH_CTRL); |
| 706 | struct { |
| 707 | u32 offset; |
| 708 | u32 mask; |
| 709 | u32 shift; |
| 710 | u32 val; |
| 711 | } default_reg[] = { |
| 712 | { |
| 713 | GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_OFFS |
| 714 | (gpii->gpii_id), |
| 715 | GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_BMSK, |
| 716 | GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_SHFT, |
| 717 | def_type, |
| 718 | }, |
| 719 | { |
| 720 | GPI_GPII_n_CNTXT_SRC_IEOB_IRQ_MSK_OFFS |
| 721 | (gpii->gpii_id), |
| 722 | GPI_GPII_n_CNTXT_SRC_IEOB_IRQ_MSK_BMSK, |
| 723 | GPI_GPII_n_CNTXT_SRC_IEOB_IRQ_MSK_SHFT, |
| 724 | GPI_GPII_n_CNTXT_SRC_IEOB_IRQ_MSK_BMSK, |
| 725 | }, |
| 726 | { |
| 727 | GPI_GPII_n_CNTXT_SRC_CH_IRQ_MSK_OFFS |
| 728 | (gpii->gpii_id), |
| 729 | GPI_GPII_n_CNTXT_SRC_CH_IRQ_MSK_BMSK, |
| 730 | GPI_GPII_n_CNTXT_SRC_CH_IRQ_MSK_SHFT, |
| 731 | GPI_GPII_n_CNTXT_SRC_CH_IRQ_MSK_BMSK, |
| 732 | }, |
| 733 | { |
| 734 | GPI_GPII_n_CNTXT_SRC_EV_CH_IRQ_MSK_OFFS |
| 735 | (gpii->gpii_id), |
| 736 | GPI_GPII_n_CNTXT_SRC_EV_CH_IRQ_MSK_BMSK, |
| 737 | GPI_GPII_n_CNTXT_SRC_EV_CH_IRQ_MSK_SHFT, |
| 738 | GPI_GPII_n_CNTXT_SRC_EV_CH_IRQ_MSK_BMSK, |
| 739 | }, |
| 740 | { |
| 741 | GPI_GPII_n_CNTXT_GLOB_IRQ_EN_OFFS |
| 742 | (gpii->gpii_id), |
| 743 | GPI_GPII_n_CNTXT_GLOB_IRQ_EN_BMSK, |
| 744 | GPI_GPII_n_CNTXT_GLOB_IRQ_EN_SHFT, |
| 745 | GPI_GPII_n_CNTXT_GLOB_IRQ_EN_ERROR_INT, |
| 746 | }, |
| 747 | { |
| 748 | GPI_GPII_n_CNTXT_GPII_IRQ_EN_OFFS |
| 749 | (gpii->gpii_id), |
| 750 | GPI_GPII_n_CNTXT_GPII_IRQ_EN_BMSK, |
| 751 | GPI_GPII_n_CNTXT_GPII_IRQ_EN_SHFT, |
| 752 | GPI_GPII_n_CNTXT_GPII_IRQ_EN_BMSK, |
| 753 | }, |
| 754 | { |
| 755 | GPI_GPII_n_CNTXT_MSI_BASE_LSB_OFFS |
| 756 | (gpii->gpii_id), |
| 757 | U32_MAX, |
| 758 | 0, |
| 759 | 0x0, |
| 760 | }, |
| 761 | { |
| 762 | GPI_GPII_n_CNTXT_MSI_BASE_MSB_OFFS |
| 763 | (gpii->gpii_id), |
| 764 | U32_MAX, |
| 765 | 0, |
| 766 | 0x0, |
| 767 | }, |
| 768 | { |
| 769 | GPI_GPII_n_CNTXT_SCRATCH_0_OFFS |
| 770 | (gpii->gpii_id), |
| 771 | U32_MAX, |
| 772 | 0, |
| 773 | 0x0, |
| 774 | }, |
| 775 | { |
| 776 | GPI_GPII_n_CNTXT_SCRATCH_1_OFFS |
| 777 | (gpii->gpii_id), |
| 778 | U32_MAX, |
| 779 | 0, |
| 780 | 0x0, |
| 781 | }, |
| 782 | { |
| 783 | GPI_GPII_n_CNTXT_INTSET_OFFS |
| 784 | (gpii->gpii_id), |
| 785 | GPI_GPII_n_CNTXT_INTSET_BMSK, |
| 786 | GPI_GPII_n_CNTXT_INTSET_SHFT, |
| 787 | 0x01, |
| 788 | }, |
| 789 | { |
| 790 | GPI_GPII_n_ERROR_LOG_OFFS |
| 791 | (gpii->gpii_id), |
| 792 | U32_MAX, |
| 793 | 0, |
| 794 | 0x00, |
| 795 | }, |
| 796 | { 0 }, |
| 797 | }; |
| 798 | |
| 799 | GPII_VERB(gpii, GPI_DBG_COMMON, "configured:%c setting:%s mask:%c\n", |
| 800 | (gpii->configured_irq) ? 'F' : 'T', |
| 801 | (settings == DEFAULT_IRQ_SETTINGS) ? "default" : "user_spec", |
| 802 | (mask) ? 'T' : 'F'); |
| 803 | |
| 804 | if (gpii->configured_irq == false) { |
| 805 | ret = devm_request_irq(gpii->gpi_dev->dev, gpii->irq, |
| 806 | gpi_handle_irq, IRQF_TRIGGER_HIGH, |
| 807 | gpii->label, gpii); |
| 808 | if (ret < 0) { |
| 809 | GPII_CRITIC(gpii, GPI_DBG_COMMON, |
| 810 | "error request irq:%d ret:%d\n", |
| 811 | gpii->irq, ret); |
| 812 | return ret; |
| 813 | } |
| 814 | } |
| 815 | |
| 816 | if (settings == MASK_IEOB_SETTINGS) { |
| 817 | /* |
| 818 | * GPII only uses one EV ring per gpii so we can globally |
| 819 | * enable/disable IEOB interrupt |
| 820 | */ |
| 821 | if (mask) |
| 822 | gpii->cntxt_type_irq_msk |= |
| 823 | GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_IEOB; |
| 824 | else |
| 825 | gpii->cntxt_type_irq_msk &= |
| 826 | ~(GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_IEOB); |
| 827 | gpi_write_reg_field(gpii, gpii->regs + |
| 828 | GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_OFFS(gpii->gpii_id), |
| 829 | GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_BMSK, |
| 830 | GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_SHFT, |
| 831 | gpii->cntxt_type_irq_msk); |
| 832 | } else { |
| 833 | for (i = 0; default_reg[i].offset; i++) |
| 834 | gpi_write_reg_field(gpii, gpii->regs + |
| 835 | default_reg[i].offset, |
| 836 | default_reg[i].mask, |
| 837 | default_reg[i].shift, |
| 838 | default_reg[i].val); |
| 839 | gpii->cntxt_type_irq_msk = def_type; |
| 840 | }; |
| 841 | |
| 842 | gpii->configured_irq = true; |
| 843 | |
| 844 | return 0; |
| 845 | } |
| 846 | |
| 847 | /* Sends gpii event or channel command */ |
| 848 | static int gpi_send_cmd(struct gpii *gpii, |
| 849 | struct gpii_chan *gpii_chan, |
| 850 | enum gpi_cmd gpi_cmd) |
| 851 | { |
| 852 | u32 chid = MAX_CHANNELS_PER_GPII; |
| 853 | u32 cmd; |
| 854 | unsigned long timeout; |
| 855 | void __iomem *cmd_reg; |
| 856 | |
| 857 | if (gpi_cmd >= GPI_MAX_CMD) |
| 858 | return -EINVAL; |
| 859 | if (IS_CHAN_CMD(gpi_cmd)) |
| 860 | chid = gpii_chan->chid; |
| 861 | |
| 862 | GPII_INFO(gpii, chid, |
| 863 | "sending cmd: %s\n", TO_GPI_CMD_STR(gpi_cmd)); |
| 864 | |
| 865 | /* send opcode and wait for completion */ |
| 866 | reinit_completion(&gpii->cmd_completion); |
| 867 | gpii->gpi_cmd = gpi_cmd; |
| 868 | |
| 869 | cmd_reg = IS_CHAN_CMD(gpi_cmd) ? gpii_chan->ch_cmd_reg : |
| 870 | gpii->ev_cmd_reg; |
| 871 | cmd = IS_CHAN_CMD(gpi_cmd) ? |
| 872 | GPI_GPII_n_CH_CMD(gpi_cmd_info[gpi_cmd].opcode, chid) : |
| 873 | GPI_GPII_n_EV_CH_CMD(gpi_cmd_info[gpi_cmd].opcode, 0); |
| 874 | gpi_write_reg(gpii, cmd_reg, cmd); |
| 875 | timeout = wait_for_completion_timeout(&gpii->cmd_completion, |
| 876 | msecs_to_jiffies(gpi_cmd_info[gpi_cmd].timeout_ms)); |
| 877 | |
| 878 | if (!timeout) { |
| 879 | GPII_ERR(gpii, chid, "cmd: %s completion timeout\n", |
| 880 | TO_GPI_CMD_STR(gpi_cmd)); |
| 881 | return -EIO; |
| 882 | } |
| 883 | |
| 884 | /* confirm new ch state is correct , if the cmd is a state change cmd */ |
| 885 | if (gpi_cmd_info[gpi_cmd].state == STATE_IGNORE) |
| 886 | return 0; |
| 887 | if (IS_CHAN_CMD(gpi_cmd) && |
| 888 | gpii_chan->ch_state == gpi_cmd_info[gpi_cmd].state) |
| 889 | return 0; |
| 890 | if (!IS_CHAN_CMD(gpi_cmd) && |
| 891 | gpii->ev_state == gpi_cmd_info[gpi_cmd].state) |
| 892 | return 0; |
| 893 | |
| 894 | return -EIO; |
| 895 | } |
| 896 | |
| 897 | /* program transfer ring DB register */ |
| 898 | static inline void gpi_write_ch_db(struct gpii_chan *gpii_chan, |
| 899 | struct gpi_ring *ring, |
| 900 | void *wp) |
| 901 | { |
| 902 | struct gpii *gpii = gpii_chan->gpii; |
| 903 | phys_addr_t p_wp; |
| 904 | |
| 905 | p_wp = to_physical(ring, wp); |
| 906 | gpi_write_reg(gpii, gpii_chan->ch_cntxt_db_reg, (u32)p_wp); |
| 907 | } |
| 908 | |
| 909 | /* program event ring DB register */ |
| 910 | static inline void gpi_write_ev_db(struct gpii *gpii, |
| 911 | struct gpi_ring *ring, |
| 912 | void *wp) |
| 913 | { |
| 914 | phys_addr_t p_wp; |
| 915 | |
| 916 | p_wp = ring->phys_addr + (wp - ring->base); |
| 917 | gpi_write_reg(gpii, gpii->ev_cntxt_db_reg, (u32)p_wp); |
| 918 | } |
| 919 | |
| 920 | /* notify client with generic event */ |
| 921 | static void gpi_generate_cb_event(struct gpii_chan *gpii_chan, |
| 922 | enum msm_gpi_cb_event event, |
| 923 | u64 status) |
| 924 | { |
| 925 | struct gpii *gpii = gpii_chan->gpii; |
| 926 | struct gpi_client_info *client_info = &gpii_chan->client_info; |
| 927 | struct msm_gpi_cb msm_gpi_cb = {0}; |
| 928 | |
| 929 | GPII_ERR(gpii, gpii_chan->chid, |
| 930 | "notifying event:%s with status:%llu\n", |
| 931 | TO_GPI_CB_EVENT_STR(event), status); |
| 932 | |
| 933 | msm_gpi_cb.cb_event = event; |
| 934 | msm_gpi_cb.status = status; |
| 935 | msm_gpi_cb.timestamp = sched_clock(); |
| 936 | client_info->callback(&gpii_chan->vc.chan, &msm_gpi_cb, |
| 937 | client_info->cb_param); |
| 938 | } |
| 939 | |
| 940 | /* process transfer completion interrupt */ |
| 941 | static void gpi_process_ieob(struct gpii *gpii) |
| 942 | { |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 943 | |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 944 | gpi_write_reg(gpii, gpii->ieob_clr_reg, BIT(0)); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 945 | |
| 946 | /* process events based on priority */ |
| 947 | if (likely(gpii->ev_priority >= EV_PRIORITY_TASKLET)) { |
| 948 | GPII_VERB(gpii, GPI_DBG_COMMON, "scheduling tasklet\n"); |
| 949 | gpi_config_interrupts(gpii, MASK_IEOB_SETTINGS, 0); |
| 950 | tasklet_schedule(&gpii->ev_task); |
| 951 | } else { |
| 952 | GPII_VERB(gpii, GPI_DBG_COMMON, "processing events from isr\n"); |
| 953 | gpi_process_events(gpii); |
| 954 | } |
| 955 | } |
| 956 | |
| 957 | /* process channel control interrupt */ |
| 958 | static void gpi_process_ch_ctrl_irq(struct gpii *gpii) |
| 959 | { |
| 960 | u32 gpii_id = gpii->gpii_id; |
| 961 | u32 offset = GPI_GPII_n_CNTXT_SRC_GPII_CH_IRQ_OFFS(gpii_id); |
| 962 | u32 ch_irq = gpi_read_reg(gpii, gpii->regs + offset); |
| 963 | u32 chid; |
| 964 | struct gpii_chan *gpii_chan; |
| 965 | u32 state; |
| 966 | |
| 967 | /* clear the status */ |
| 968 | offset = GPI_GPII_n_CNTXT_SRC_CH_IRQ_CLR_OFFS(gpii_id); |
| 969 | gpi_write_reg(gpii, gpii->regs + offset, (u32)ch_irq); |
| 970 | |
| 971 | for (chid = 0; chid < MAX_CHANNELS_PER_GPII; chid++) { |
| 972 | if (!(BIT(chid) & ch_irq)) |
| 973 | continue; |
| 974 | |
| 975 | gpii_chan = &gpii->gpii_chan[chid]; |
| 976 | GPII_VERB(gpii, chid, "processing channel ctrl irq\n"); |
| 977 | state = gpi_read_reg(gpii, gpii_chan->ch_cntxt_base_reg + |
| 978 | CNTXT_0_CONFIG); |
| 979 | state = (state & GPI_GPII_n_CH_k_CNTXT_0_CHSTATE_BMSK) >> |
| 980 | GPI_GPII_n_CH_k_CNTXT_0_CHSTATE_SHFT; |
| 981 | |
| 982 | /* |
| 983 | * CH_CMD_DEALLOC cmd always successful. However cmd does |
| 984 | * not change hardware status. So overwriting software state |
| 985 | * to default state. |
| 986 | */ |
| 987 | if (gpii->gpi_cmd == GPI_CH_CMD_DE_ALLOC) |
| 988 | state = DEFAULT_CH_STATE; |
| 989 | gpii_chan->ch_state = state; |
| 990 | GPII_VERB(gpii, chid, "setting channel to state:%s\n", |
| 991 | TO_GPI_CH_STATE_STR(gpii_chan->ch_state)); |
| 992 | |
| 993 | /* |
| 994 | * Triggering complete all if ch_state is not a stop in process. |
| 995 | * Stop in process is a transition state and we will wait for |
| 996 | * stop interrupt before notifying. |
| 997 | */ |
| 998 | if (gpii_chan->ch_state != CH_STATE_STOP_IN_PROC) |
| 999 | complete_all(&gpii->cmd_completion); |
| 1000 | |
| 1001 | /* notifying clients if in error state */ |
| 1002 | if (gpii_chan->ch_state == CH_STATE_ERROR) |
| 1003 | gpi_generate_cb_event(gpii_chan, MSM_GPI_QUP_CH_ERROR, |
| 1004 | __LINE__); |
| 1005 | } |
| 1006 | } |
| 1007 | |
| 1008 | /* processing gpi level error interrupts */ |
| 1009 | static void gpi_process_glob_err_irq(struct gpii *gpii) |
| 1010 | { |
| 1011 | u32 gpii_id = gpii->gpii_id; |
| 1012 | u32 offset = GPI_GPII_n_CNTXT_GLOB_IRQ_STTS_OFFS(gpii_id); |
| 1013 | u32 irq_stts = gpi_read_reg(gpii, gpii->regs + offset); |
| 1014 | u32 error_log; |
| 1015 | u32 chid; |
| 1016 | struct gpii_chan *gpii_chan; |
| 1017 | struct gpi_client_info *client_info; |
| 1018 | struct msm_gpi_cb msm_gpi_cb; |
| 1019 | struct gpi_error_log_entry *log_entry = |
| 1020 | (struct gpi_error_log_entry *)&error_log; |
| 1021 | |
| 1022 | offset = GPI_GPII_n_CNTXT_GLOB_IRQ_CLR_OFFS(gpii_id); |
| 1023 | gpi_write_reg(gpii, gpii->regs + offset, irq_stts); |
| 1024 | |
| 1025 | /* only error interrupt should be set */ |
| 1026 | if (irq_stts & ~GPI_GLOB_IRQ_ERROR_INT_MSK) { |
| 1027 | GPII_ERR(gpii, GPI_DBG_COMMON, "invalid error status:0x%x\n", |
| 1028 | irq_stts); |
| 1029 | goto error_irq; |
| 1030 | } |
| 1031 | |
| 1032 | offset = GPI_GPII_n_ERROR_LOG_OFFS(gpii_id); |
| 1033 | error_log = gpi_read_reg(gpii, gpii->regs + offset); |
| 1034 | gpi_write_reg(gpii, gpii->regs + offset, 0); |
| 1035 | |
| 1036 | /* get channel info */ |
| 1037 | chid = ((struct gpi_error_log_entry *)&error_log)->chid; |
| 1038 | if (unlikely(chid >= MAX_CHANNELS_PER_GPII)) { |
| 1039 | GPII_ERR(gpii, GPI_DBG_COMMON, "invalid chid reported:%u\n", |
| 1040 | chid); |
| 1041 | goto error_irq; |
| 1042 | } |
| 1043 | |
| 1044 | gpii_chan = &gpii->gpii_chan[chid]; |
| 1045 | client_info = &gpii_chan->client_info; |
| 1046 | |
| 1047 | /* notify client with error log */ |
| 1048 | msm_gpi_cb.cb_event = MSM_GPI_QUP_ERROR; |
| 1049 | msm_gpi_cb.error_log.routine = log_entry->routine; |
| 1050 | msm_gpi_cb.error_log.type = log_entry->type; |
| 1051 | msm_gpi_cb.error_log.error_code = log_entry->code; |
| 1052 | GPII_INFO(gpii, gpii_chan->chid, "sending CB event:%s\n", |
| 1053 | TO_GPI_CB_EVENT_STR(msm_gpi_cb.cb_event)); |
| 1054 | GPII_ERR(gpii, gpii_chan->chid, |
| 1055 | "ee:%u chtype:%u routine:%u type:%u error_code:%u\n", |
| 1056 | log_entry->ee, log_entry->chtype, |
| 1057 | msm_gpi_cb.error_log.routine, |
| 1058 | msm_gpi_cb.error_log.type, |
| 1059 | msm_gpi_cb.error_log.error_code); |
| 1060 | client_info->callback(&gpii_chan->vc.chan, &msm_gpi_cb, |
| 1061 | client_info->cb_param); |
| 1062 | |
| 1063 | return; |
| 1064 | |
| 1065 | error_irq: |
| 1066 | for (chid = 0, gpii_chan = gpii->gpii_chan; |
| 1067 | chid < MAX_CHANNELS_PER_GPII; chid++, gpii_chan++) |
| 1068 | gpi_generate_cb_event(gpii_chan, MSM_GPI_QUP_FW_ERROR, |
| 1069 | irq_stts); |
| 1070 | } |
| 1071 | |
| 1072 | /* gpii interrupt handler */ |
| 1073 | static irqreturn_t gpi_handle_irq(int irq, void *data) |
| 1074 | { |
| 1075 | struct gpii *gpii = data; |
| 1076 | u32 type; |
| 1077 | unsigned long flags; |
| 1078 | u32 offset; |
| 1079 | u32 gpii_id = gpii->gpii_id; |
| 1080 | |
| 1081 | GPII_VERB(gpii, GPI_DBG_COMMON, "enter\n"); |
| 1082 | |
| 1083 | read_lock_irqsave(&gpii->pm_lock, flags); |
| 1084 | |
| 1085 | /* |
| 1086 | * States are out of sync to receive interrupt |
| 1087 | * while software state is in DISABLE state, bailing out. |
| 1088 | */ |
| 1089 | if (!REG_ACCESS_VALID(gpii->pm_state)) { |
| 1090 | GPII_CRITIC(gpii, GPI_DBG_COMMON, |
| 1091 | "receive interrupt while in %s state\n", |
| 1092 | TO_GPI_PM_STR(gpii->pm_state)); |
| 1093 | goto exit_irq; |
| 1094 | } |
| 1095 | |
| 1096 | offset = GPI_GPII_n_CNTXT_TYPE_IRQ_OFFS(gpii->gpii_id); |
| 1097 | type = gpi_read_reg(gpii, gpii->regs + offset); |
| 1098 | |
| 1099 | do { |
| 1100 | GPII_VERB(gpii, GPI_DBG_COMMON, "CNTXT_TYPE_IRQ:0x%08x\n", |
| 1101 | type); |
| 1102 | /* global gpii error */ |
| 1103 | if (type & GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_GLOB) { |
| 1104 | GPII_ERR(gpii, GPI_DBG_COMMON, |
| 1105 | "processing global error irq\n"); |
| 1106 | gpi_process_glob_err_irq(gpii); |
| 1107 | type &= ~(GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_GLOB); |
| 1108 | } |
| 1109 | |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 1110 | /* transfer complete interrupt */ |
| 1111 | if (type & GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_IEOB) { |
| 1112 | GPII_VERB(gpii, GPI_DBG_COMMON, |
| 1113 | "process IEOB interrupts\n"); |
| 1114 | gpi_process_ieob(gpii); |
| 1115 | type &= ~GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_IEOB; |
| 1116 | } |
| 1117 | |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1118 | /* event control irq */ |
| 1119 | if (type & GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_EV_CTRL) { |
| 1120 | u32 ev_state; |
| 1121 | u32 ev_ch_irq; |
| 1122 | |
| 1123 | GPII_INFO(gpii, GPI_DBG_COMMON, |
| 1124 | "processing EV CTRL interrupt\n"); |
| 1125 | offset = GPI_GPII_n_CNTXT_SRC_EV_CH_IRQ_OFFS(gpii_id); |
| 1126 | ev_ch_irq = gpi_read_reg(gpii, gpii->regs + offset); |
| 1127 | |
| 1128 | offset = GPI_GPII_n_CNTXT_SRC_EV_CH_IRQ_CLR_OFFS |
| 1129 | (gpii_id); |
| 1130 | gpi_write_reg(gpii, gpii->regs + offset, ev_ch_irq); |
| 1131 | ev_state = gpi_read_reg(gpii, gpii->ev_cntxt_base_reg + |
| 1132 | CNTXT_0_CONFIG); |
| 1133 | ev_state &= GPI_GPII_n_EV_CH_k_CNTXT_0_CHSTATE_BMSK; |
| 1134 | ev_state >>= GPI_GPII_n_EV_CH_k_CNTXT_0_CHSTATE_SHFT; |
| 1135 | |
| 1136 | /* |
| 1137 | * CMD EV_CMD_DEALLOC is always successful. However |
| 1138 | * cmd does not change hardware status. So overwriting |
| 1139 | * software state to default state. |
| 1140 | */ |
| 1141 | if (gpii->gpi_cmd == GPI_EV_CMD_DEALLOC) |
| 1142 | ev_state = DEFAULT_EV_CH_STATE; |
| 1143 | |
| 1144 | gpii->ev_state = ev_state; |
| 1145 | GPII_INFO(gpii, GPI_DBG_COMMON, |
| 1146 | "setting EV state to %s\n", |
| 1147 | TO_GPI_EV_STATE_STR(gpii->ev_state)); |
| 1148 | complete_all(&gpii->cmd_completion); |
| 1149 | type &= ~(GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_EV_CTRL); |
| 1150 | } |
| 1151 | |
| 1152 | /* channel control irq */ |
| 1153 | if (type & GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_CH_CTRL) { |
| 1154 | GPII_INFO(gpii, GPI_DBG_COMMON, |
| 1155 | "process CH CTRL interrupts\n"); |
| 1156 | gpi_process_ch_ctrl_irq(gpii); |
| 1157 | type &= ~(GPI_GPII_n_CNTXT_TYPE_IRQ_MSK_CH_CTRL); |
| 1158 | } |
| 1159 | |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1160 | if (type) { |
| 1161 | GPII_CRITIC(gpii, GPI_DBG_COMMON, |
| 1162 | "Unhandled interrupt status:0x%x\n", type); |
| 1163 | goto exit_irq; |
| 1164 | } |
| 1165 | offset = GPI_GPII_n_CNTXT_TYPE_IRQ_OFFS(gpii->gpii_id); |
| 1166 | type = gpi_read_reg(gpii, gpii->regs + offset); |
| 1167 | } while (type); |
| 1168 | |
| 1169 | exit_irq: |
| 1170 | read_unlock_irqrestore(&gpii->pm_lock, flags); |
| 1171 | GPII_VERB(gpii, GPI_DBG_COMMON, "exit\n"); |
| 1172 | |
| 1173 | return IRQ_HANDLED; |
| 1174 | } |
| 1175 | |
| 1176 | /* process qup notification events */ |
| 1177 | static void gpi_process_qup_notif_event(struct gpii_chan *gpii_chan, |
| 1178 | struct qup_notif_event *notif_event) |
| 1179 | { |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1180 | struct gpi_client_info *client_info = &gpii_chan->client_info; |
| 1181 | struct msm_gpi_cb msm_gpi_cb; |
| 1182 | |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 1183 | GPII_VERB(gpii_chan->gpii, gpii_chan->chid, |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1184 | "status:0x%x time:0x%x count:0x%x\n", |
| 1185 | notif_event->status, notif_event->time, notif_event->count); |
| 1186 | |
| 1187 | msm_gpi_cb.cb_event = MSM_GPI_QUP_NOTIFY; |
| 1188 | msm_gpi_cb.status = notif_event->status; |
| 1189 | msm_gpi_cb.timestamp = notif_event->time; |
| 1190 | msm_gpi_cb.count = notif_event->count; |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 1191 | GPII_VERB(gpii_chan->gpii, gpii_chan->chid, "sending CB event:%s\n", |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1192 | TO_GPI_CB_EVENT_STR(msm_gpi_cb.cb_event)); |
| 1193 | client_info->callback(&gpii_chan->vc.chan, &msm_gpi_cb, |
| 1194 | client_info->cb_param); |
| 1195 | } |
| 1196 | |
| 1197 | /* process DMA Immediate completion data events */ |
| 1198 | static void gpi_process_imed_data_event(struct gpii_chan *gpii_chan, |
| 1199 | struct immediate_data_event *imed_event) |
| 1200 | { |
| 1201 | struct gpii *gpii = gpii_chan->gpii; |
| 1202 | struct gpi_ring *ch_ring = &gpii_chan->ch_ring; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1203 | struct virt_dma_desc *vd; |
| 1204 | struct gpi_desc *gpi_desc; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1205 | void *tre = ch_ring->base + |
| 1206 | (ch_ring->el_size * imed_event->tre_index); |
| 1207 | struct msm_gpi_dma_async_tx_cb_param *tx_cb_param; |
Sujeev Dias | e019709 | 2017-11-27 20:36:26 -0800 | [diff] [blame] | 1208 | unsigned long flags; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1209 | |
| 1210 | /* |
| 1211 | * If channel not active don't process event but let |
| 1212 | * client know pending event is available |
| 1213 | */ |
| 1214 | if (gpii_chan->pm_state != ACTIVE_STATE) { |
| 1215 | GPII_ERR(gpii, gpii_chan->chid, |
| 1216 | "skipping processing event because ch @ %s state\n", |
| 1217 | TO_GPI_PM_STR(gpii_chan->pm_state)); |
| 1218 | gpi_generate_cb_event(gpii_chan, MSM_GPI_QUP_PENDING_EVENT, |
| 1219 | __LINE__); |
| 1220 | return; |
| 1221 | } |
| 1222 | |
Sujeev Dias | e019709 | 2017-11-27 20:36:26 -0800 | [diff] [blame] | 1223 | spin_lock_irqsave(&gpii_chan->vc.lock, flags); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1224 | vd = vchan_next_desc(&gpii_chan->vc); |
| 1225 | if (!vd) { |
| 1226 | struct gpi_ere *gpi_ere; |
| 1227 | struct msm_gpi_tre *gpi_tre; |
| 1228 | |
Sujeev Dias | e019709 | 2017-11-27 20:36:26 -0800 | [diff] [blame] | 1229 | spin_unlock_irqrestore(&gpii_chan->vc.lock, flags); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1230 | GPII_ERR(gpii, gpii_chan->chid, |
| 1231 | "event without a pending descriptor!\n"); |
| 1232 | gpi_ere = (struct gpi_ere *)imed_event; |
| 1233 | GPII_ERR(gpii, gpii_chan->chid, "Event: %08x %08x %08x %08x\n", |
| 1234 | gpi_ere->dword[0], gpi_ere->dword[1], |
| 1235 | gpi_ere->dword[2], gpi_ere->dword[3]); |
| 1236 | gpi_tre = tre; |
| 1237 | GPII_ERR(gpii, gpii_chan->chid, |
| 1238 | "Pending TRE: %08x %08x %08x %08x\n", |
| 1239 | gpi_tre->dword[0], gpi_tre->dword[1], |
| 1240 | gpi_tre->dword[2], gpi_tre->dword[3]); |
| 1241 | gpi_generate_cb_event(gpii_chan, MSM_GPI_QUP_EOT_DESC_MISMATCH, |
| 1242 | __LINE__); |
| 1243 | return; |
| 1244 | } |
| 1245 | gpi_desc = to_gpi_desc(vd); |
| 1246 | |
| 1247 | /* Event TR RP gen. don't match descriptor TR */ |
| 1248 | if (gpi_desc->wp != tre) { |
Siva Kumar Akkireddi | 15fb394 | 2018-08-02 13:33:35 +0530 | [diff] [blame] | 1249 | phys_addr_t p_wp = to_physical(ch_ring, gpi_desc->wp); |
| 1250 | phys_addr_t p_tre = to_physical(ch_ring, tre); |
| 1251 | |
Sujeev Dias | e019709 | 2017-11-27 20:36:26 -0800 | [diff] [blame] | 1252 | spin_unlock_irqrestore(&gpii_chan->vc.lock, flags); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1253 | GPII_ERR(gpii, gpii_chan->chid, |
Siva Kumar Akkireddi | 15fb394 | 2018-08-02 13:33:35 +0530 | [diff] [blame] | 1254 | "EOT/EOB received for wrong TRE %pa != %pa\n", |
| 1255 | &p_wp, &p_tre); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1256 | gpi_generate_cb_event(gpii_chan, MSM_GPI_QUP_EOT_DESC_MISMATCH, |
| 1257 | __LINE__); |
| 1258 | return; |
| 1259 | } |
| 1260 | |
| 1261 | list_del(&vd->node); |
Sujeev Dias | e019709 | 2017-11-27 20:36:26 -0800 | [diff] [blame] | 1262 | spin_unlock_irqrestore(&gpii_chan->vc.lock, flags); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1263 | |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1264 | |
| 1265 | /* |
| 1266 | * RP pointed by Event is to last TRE processed, |
| 1267 | * we need to update ring rp to tre + 1 |
| 1268 | */ |
| 1269 | tre += ch_ring->el_size; |
| 1270 | if (tre >= (ch_ring->base + ch_ring->len)) |
| 1271 | tre = ch_ring->base; |
| 1272 | ch_ring->rp = tre; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1273 | |
| 1274 | /* make sure rp updates are immediately visible to all cores */ |
| 1275 | smp_wmb(); |
| 1276 | |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1277 | tx_cb_param = vd->tx.callback_param; |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 1278 | if (vd->tx.callback && tx_cb_param) { |
Sujeev Dias | 8fc2600 | 2017-11-29 20:51:40 -0800 | [diff] [blame] | 1279 | struct msm_gpi_tre *imed_tre = &tx_cb_param->imed_tre; |
| 1280 | |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1281 | GPII_VERB(gpii, gpii_chan->chid, |
| 1282 | "cb_length:%u compl_code:0x%x status:0x%x\n", |
| 1283 | imed_event->length, imed_event->code, |
| 1284 | imed_event->status); |
Sujeev Dias | 8fc2600 | 2017-11-29 20:51:40 -0800 | [diff] [blame] | 1285 | /* Update immediate data if any from event */ |
| 1286 | *imed_tre = *((struct msm_gpi_tre *)imed_event); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1287 | tx_cb_param->length = imed_event->length; |
| 1288 | tx_cb_param->completion_code = imed_event->code; |
| 1289 | tx_cb_param->status = imed_event->status; |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 1290 | vd->tx.callback(tx_cb_param); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1291 | } |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 1292 | kfree(gpi_desc); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1293 | } |
| 1294 | |
| 1295 | /* processing transfer completion events */ |
| 1296 | static void gpi_process_xfer_compl_event(struct gpii_chan *gpii_chan, |
| 1297 | struct xfer_compl_event *compl_event) |
| 1298 | { |
| 1299 | struct gpii *gpii = gpii_chan->gpii; |
| 1300 | struct gpi_ring *ch_ring = &gpii_chan->ch_ring; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1301 | void *ev_rp = to_virtual(ch_ring, compl_event->ptr); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1302 | struct virt_dma_desc *vd; |
| 1303 | struct msm_gpi_dma_async_tx_cb_param *tx_cb_param; |
| 1304 | struct gpi_desc *gpi_desc; |
Sujeev Dias | e019709 | 2017-11-27 20:36:26 -0800 | [diff] [blame] | 1305 | unsigned long flags; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1306 | |
| 1307 | /* only process events on active channel */ |
| 1308 | if (unlikely(gpii_chan->pm_state != ACTIVE_STATE)) { |
| 1309 | GPII_ERR(gpii, gpii_chan->chid, |
| 1310 | "skipping processing event because ch @ %s state\n", |
| 1311 | TO_GPI_PM_STR(gpii_chan->pm_state)); |
| 1312 | gpi_generate_cb_event(gpii_chan, MSM_GPI_QUP_PENDING_EVENT, |
| 1313 | __LINE__); |
| 1314 | return; |
| 1315 | } |
| 1316 | |
Sujeev Dias | e019709 | 2017-11-27 20:36:26 -0800 | [diff] [blame] | 1317 | spin_lock_irqsave(&gpii_chan->vc.lock, flags); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1318 | vd = vchan_next_desc(&gpii_chan->vc); |
| 1319 | if (!vd) { |
| 1320 | struct gpi_ere *gpi_ere; |
| 1321 | |
Sujeev Dias | e019709 | 2017-11-27 20:36:26 -0800 | [diff] [blame] | 1322 | spin_unlock_irqrestore(&gpii_chan->vc.lock, flags); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1323 | GPII_ERR(gpii, gpii_chan->chid, |
| 1324 | "Event without a pending descriptor!\n"); |
| 1325 | gpi_ere = (struct gpi_ere *)compl_event; |
| 1326 | GPII_ERR(gpii, gpii_chan->chid, "Event: %08x %08x %08x %08x\n", |
| 1327 | gpi_ere->dword[0], gpi_ere->dword[1], |
| 1328 | gpi_ere->dword[2], gpi_ere->dword[3]); |
| 1329 | gpi_generate_cb_event(gpii_chan, MSM_GPI_QUP_EOT_DESC_MISMATCH, |
| 1330 | __LINE__); |
| 1331 | return; |
| 1332 | } |
| 1333 | |
| 1334 | gpi_desc = to_gpi_desc(vd); |
| 1335 | |
| 1336 | /* TRE Event generated didn't match descriptor's TRE */ |
| 1337 | if (gpi_desc->wp != ev_rp) { |
Siva Kumar Akkireddi | 15fb394 | 2018-08-02 13:33:35 +0530 | [diff] [blame] | 1338 | phys_addr_t p_wp = to_physical(ch_ring, gpi_desc->wp); |
| 1339 | phys_addr_t p_ev_rp = to_physical(ch_ring, ev_rp); |
| 1340 | |
Sujeev Dias | e019709 | 2017-11-27 20:36:26 -0800 | [diff] [blame] | 1341 | spin_unlock_irqrestore(&gpii_chan->vc.lock, flags); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1342 | GPII_ERR(gpii, gpii_chan->chid, |
Siva Kumar Akkireddi | 15fb394 | 2018-08-02 13:33:35 +0530 | [diff] [blame] | 1343 | "EOT\EOB received for wrong TRE %pa != %pa\n", |
| 1344 | &p_wp, &p_ev_rp); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1345 | gpi_generate_cb_event(gpii_chan, MSM_GPI_QUP_EOT_DESC_MISMATCH, |
| 1346 | __LINE__); |
| 1347 | return; |
| 1348 | } |
| 1349 | |
| 1350 | list_del(&vd->node); |
Sujeev Dias | e019709 | 2017-11-27 20:36:26 -0800 | [diff] [blame] | 1351 | spin_unlock_irqrestore(&gpii_chan->vc.lock, flags); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1352 | |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1353 | |
| 1354 | /* |
| 1355 | * RP pointed by Event is to last TRE processed, |
| 1356 | * we need to update ring rp to ev_rp + 1 |
| 1357 | */ |
| 1358 | ev_rp += ch_ring->el_size; |
| 1359 | if (ev_rp >= (ch_ring->base + ch_ring->len)) |
| 1360 | ev_rp = ch_ring->base; |
| 1361 | ch_ring->rp = ev_rp; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1362 | |
| 1363 | /* update must be visible to other cores */ |
| 1364 | smp_wmb(); |
| 1365 | |
| 1366 | tx_cb_param = vd->tx.callback_param; |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 1367 | if (vd->tx.callback && tx_cb_param) { |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1368 | GPII_VERB(gpii, gpii_chan->chid, |
| 1369 | "cb_length:%u compl_code:0x%x status:0x%x\n", |
| 1370 | compl_event->length, compl_event->code, |
| 1371 | compl_event->status); |
| 1372 | tx_cb_param->length = compl_event->length; |
| 1373 | tx_cb_param->completion_code = compl_event->code; |
| 1374 | tx_cb_param->status = compl_event->status; |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 1375 | vd->tx.callback(tx_cb_param); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1376 | } |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 1377 | kfree(gpi_desc); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1378 | } |
| 1379 | |
| 1380 | /* process all events */ |
| 1381 | static void gpi_process_events(struct gpii *gpii) |
| 1382 | { |
| 1383 | struct gpi_ring *ev_ring = &gpii->ev_ring; |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 1384 | phys_addr_t cntxt_rp, local_rp; |
| 1385 | void *rp; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1386 | union gpi_event *gpi_event; |
| 1387 | struct gpii_chan *gpii_chan; |
| 1388 | u32 chid, type; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1389 | |
| 1390 | cntxt_rp = gpi_read_reg(gpii, gpii->ev_ring_rp_lsb_reg); |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 1391 | rp = to_virtual(ev_ring, cntxt_rp); |
| 1392 | local_rp = to_physical(ev_ring, ev_ring->rp); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1393 | |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 1394 | GPII_VERB(gpii, GPI_DBG_COMMON, "cntxt_rp:%pa local_rp:%pa\n", |
| 1395 | &cntxt_rp, &local_rp); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1396 | |
| 1397 | do { |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 1398 | while (rp != ev_ring->rp) { |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1399 | gpi_event = ev_ring->rp; |
| 1400 | chid = gpi_event->xfer_compl_event.chid; |
| 1401 | type = gpi_event->xfer_compl_event.type; |
| 1402 | GPII_VERB(gpii, GPI_DBG_COMMON, |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 1403 | "chid:%u type:0x%x %08x %08x %08x %08x\n", |
| 1404 | chid, type, |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1405 | gpi_event->gpi_ere.dword[0], |
| 1406 | gpi_event->gpi_ere.dword[1], |
| 1407 | gpi_event->gpi_ere.dword[2], |
| 1408 | gpi_event->gpi_ere.dword[3]); |
| 1409 | |
| 1410 | switch (type) { |
| 1411 | case XFER_COMPLETE_EV_TYPE: |
| 1412 | gpii_chan = &gpii->gpii_chan[chid]; |
| 1413 | gpi_process_xfer_compl_event(gpii_chan, |
| 1414 | &gpi_event->xfer_compl_event); |
| 1415 | break; |
| 1416 | case STALE_EV_TYPE: |
| 1417 | GPII_VERB(gpii, GPI_DBG_COMMON, |
| 1418 | "stale event, not processing\n"); |
| 1419 | break; |
| 1420 | case IMMEDIATE_DATA_EV_TYPE: |
| 1421 | gpii_chan = &gpii->gpii_chan[chid]; |
| 1422 | gpi_process_imed_data_event(gpii_chan, |
| 1423 | &gpi_event->immediate_data_event); |
| 1424 | break; |
| 1425 | case QUP_NOTIF_EV_TYPE: |
| 1426 | gpii_chan = &gpii->gpii_chan[chid]; |
| 1427 | gpi_process_qup_notif_event(gpii_chan, |
| 1428 | &gpi_event->qup_notif_event); |
| 1429 | break; |
| 1430 | default: |
| 1431 | GPII_VERB(gpii, GPI_DBG_COMMON, |
| 1432 | "not supported event type:0x%x\n", |
| 1433 | type); |
| 1434 | } |
| 1435 | gpi_ring_recycle_ev_element(ev_ring); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1436 | } |
| 1437 | gpi_write_ev_db(gpii, ev_ring, ev_ring->wp); |
| 1438 | |
| 1439 | /* clear pending IEOB events */ |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 1440 | gpi_write_reg(gpii, gpii->ieob_clr_reg, BIT(0)); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1441 | |
| 1442 | cntxt_rp = gpi_read_reg(gpii, gpii->ev_ring_rp_lsb_reg); |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 1443 | rp = to_virtual(ev_ring, cntxt_rp); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1444 | |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 1445 | } while (rp != ev_ring->rp); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1446 | |
Sujeev Dias | a29e960 | 2017-11-29 22:13:17 -0800 | [diff] [blame] | 1447 | GPII_VERB(gpii, GPI_DBG_COMMON, "exit: c_rp:%pa\n", &cntxt_rp); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1448 | } |
| 1449 | |
| 1450 | /* processing events using tasklet */ |
| 1451 | static void gpi_ev_tasklet(unsigned long data) |
| 1452 | { |
| 1453 | struct gpii *gpii = (struct gpii *)data; |
| 1454 | |
| 1455 | GPII_VERB(gpii, GPI_DBG_COMMON, "enter\n"); |
| 1456 | |
| 1457 | read_lock_bh(&gpii->pm_lock); |
| 1458 | if (!REG_ACCESS_VALID(gpii->pm_state)) { |
| 1459 | read_unlock_bh(&gpii->pm_lock); |
| 1460 | GPII_ERR(gpii, GPI_DBG_COMMON, |
| 1461 | "not processing any events, pm_state:%s\n", |
| 1462 | TO_GPI_PM_STR(gpii->pm_state)); |
| 1463 | return; |
| 1464 | } |
| 1465 | |
| 1466 | /* process the events */ |
| 1467 | gpi_process_events(gpii); |
| 1468 | |
| 1469 | /* enable IEOB, switching back to interrupts */ |
| 1470 | gpi_config_interrupts(gpii, MASK_IEOB_SETTINGS, 1); |
| 1471 | read_unlock_bh(&gpii->pm_lock); |
| 1472 | |
| 1473 | GPII_VERB(gpii, GPI_DBG_COMMON, "exit\n"); |
| 1474 | } |
| 1475 | |
| 1476 | /* marks all pending events for the channel as stale */ |
| 1477 | void gpi_mark_stale_events(struct gpii_chan *gpii_chan) |
| 1478 | { |
| 1479 | struct gpii *gpii = gpii_chan->gpii; |
| 1480 | struct gpi_ring *ev_ring = &gpii->ev_ring; |
| 1481 | void *ev_rp; |
| 1482 | u32 cntxt_rp, local_rp; |
| 1483 | |
| 1484 | GPII_INFO(gpii, gpii_chan->chid, "Enter\n"); |
| 1485 | cntxt_rp = gpi_read_reg(gpii, gpii->ev_ring_rp_lsb_reg); |
| 1486 | |
| 1487 | ev_rp = ev_ring->rp; |
| 1488 | local_rp = (u32)to_physical(ev_ring, ev_rp); |
| 1489 | while (local_rp != cntxt_rp) { |
| 1490 | union gpi_event *gpi_event = ev_rp; |
| 1491 | u32 chid = gpi_event->xfer_compl_event.chid; |
| 1492 | |
| 1493 | if (chid == gpii_chan->chid) |
| 1494 | gpi_event->xfer_compl_event.type = STALE_EV_TYPE; |
| 1495 | ev_rp += ev_ring->el_size; |
| 1496 | if (ev_rp >= (ev_ring->base + ev_ring->len)) |
| 1497 | ev_rp = ev_ring->base; |
| 1498 | cntxt_rp = gpi_read_reg(gpii, gpii->ev_ring_rp_lsb_reg); |
| 1499 | local_rp = (u32)to_physical(ev_ring, ev_rp); |
| 1500 | } |
| 1501 | } |
| 1502 | |
| 1503 | /* reset sw state and issue channel reset or de-alloc */ |
| 1504 | static int gpi_reset_chan(struct gpii_chan *gpii_chan, enum gpi_cmd gpi_cmd) |
| 1505 | { |
| 1506 | struct gpii *gpii = gpii_chan->gpii; |
| 1507 | struct gpi_ring *ch_ring = &gpii_chan->ch_ring; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1508 | unsigned long flags; |
| 1509 | LIST_HEAD(list); |
| 1510 | int ret; |
| 1511 | |
| 1512 | GPII_INFO(gpii, gpii_chan->chid, "Enter\n"); |
| 1513 | ret = gpi_send_cmd(gpii, gpii_chan, gpi_cmd); |
| 1514 | if (ret) { |
| 1515 | GPII_ERR(gpii, gpii_chan->chid, |
| 1516 | "Error with cmd:%s ret:%d\n", |
| 1517 | TO_GPI_CMD_STR(gpi_cmd), ret); |
| 1518 | return ret; |
| 1519 | } |
| 1520 | |
| 1521 | /* initialize the local ring ptrs */ |
| 1522 | ch_ring->rp = ch_ring->base; |
| 1523 | ch_ring->wp = ch_ring->base; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1524 | |
| 1525 | /* visible to other cores */ |
| 1526 | smp_wmb(); |
| 1527 | |
| 1528 | /* check event ring for any stale events */ |
| 1529 | write_lock_irq(&gpii->pm_lock); |
| 1530 | gpi_mark_stale_events(gpii_chan); |
| 1531 | |
| 1532 | /* remove all async descriptors */ |
| 1533 | spin_lock_irqsave(&gpii_chan->vc.lock, flags); |
| 1534 | vchan_get_all_descriptors(&gpii_chan->vc, &list); |
| 1535 | spin_unlock_irqrestore(&gpii_chan->vc.lock, flags); |
| 1536 | write_unlock_irq(&gpii->pm_lock); |
| 1537 | vchan_dma_desc_free_list(&gpii_chan->vc, &list); |
| 1538 | |
| 1539 | return 0; |
| 1540 | } |
| 1541 | |
| 1542 | static int gpi_start_chan(struct gpii_chan *gpii_chan) |
| 1543 | { |
| 1544 | struct gpii *gpii = gpii_chan->gpii; |
| 1545 | int ret; |
| 1546 | |
| 1547 | GPII_INFO(gpii, gpii_chan->chid, "Enter\n"); |
| 1548 | |
| 1549 | ret = gpi_send_cmd(gpii, gpii_chan, GPI_CH_CMD_START); |
| 1550 | if (ret) { |
| 1551 | GPII_ERR(gpii, gpii_chan->chid, |
| 1552 | "Error with cmd:%s ret:%d\n", |
| 1553 | TO_GPI_CMD_STR(GPI_CH_CMD_START), ret); |
| 1554 | return ret; |
| 1555 | } |
| 1556 | |
| 1557 | /* gpii CH is active now */ |
| 1558 | write_lock_irq(&gpii->pm_lock); |
| 1559 | gpii_chan->pm_state = ACTIVE_STATE; |
| 1560 | write_unlock_irq(&gpii->pm_lock); |
| 1561 | |
| 1562 | return 0; |
| 1563 | } |
| 1564 | |
| 1565 | /* allocate and configure the transfer channel */ |
| 1566 | static int gpi_alloc_chan(struct gpii_chan *gpii_chan, bool send_alloc_cmd) |
| 1567 | { |
| 1568 | struct gpii *gpii = gpii_chan->gpii; |
| 1569 | struct gpi_ring *ring = &gpii_chan->ch_ring; |
| 1570 | int i; |
| 1571 | int ret; |
| 1572 | struct { |
| 1573 | void *base; |
| 1574 | int offset; |
| 1575 | u32 val; |
| 1576 | } ch_reg[] = { |
| 1577 | { |
| 1578 | gpii_chan->ch_cntxt_base_reg, |
| 1579 | CNTXT_0_CONFIG, |
| 1580 | GPI_GPII_n_CH_k_CNTXT_0(ring->el_size, 0, |
| 1581 | gpii_chan->dir, |
| 1582 | GPI_CHTYPE_PROTO_GPI), |
| 1583 | }, |
| 1584 | { |
| 1585 | gpii_chan->ch_cntxt_base_reg, |
| 1586 | CNTXT_1_R_LENGTH, |
| 1587 | ring->len, |
| 1588 | }, |
| 1589 | { |
| 1590 | gpii_chan->ch_cntxt_base_reg, |
| 1591 | CNTXT_2_RING_BASE_LSB, |
| 1592 | (u32)ring->phys_addr, |
| 1593 | }, |
| 1594 | { |
| 1595 | gpii_chan->ch_cntxt_base_reg, |
| 1596 | CNTXT_3_RING_BASE_MSB, |
Siva Kumar Akkireddi | 15fb394 | 2018-08-02 13:33:35 +0530 | [diff] [blame] | 1597 | MSM_GPI_RING_PHYS_ADDR_UPPER(ring), |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1598 | }, |
| 1599 | { /* program MSB of DB register with ring base */ |
| 1600 | gpii_chan->ch_cntxt_db_reg, |
| 1601 | CNTXT_5_RING_RP_MSB - CNTXT_4_RING_RP_LSB, |
Siva Kumar Akkireddi | 15fb394 | 2018-08-02 13:33:35 +0530 | [diff] [blame] | 1602 | MSM_GPI_RING_PHYS_ADDR_UPPER(ring), |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1603 | }, |
| 1604 | { |
| 1605 | gpii->regs, |
| 1606 | GPI_GPII_n_CH_k_SCRATCH_0_OFFS(gpii->gpii_id, |
| 1607 | gpii_chan->chid), |
| 1608 | GPI_GPII_n_CH_K_SCRATCH_0(!gpii_chan->chid, |
| 1609 | gpii_chan->protocol, |
| 1610 | gpii_chan->seid), |
| 1611 | }, |
| 1612 | { |
| 1613 | gpii->regs, |
| 1614 | GPI_GPII_n_CH_k_SCRATCH_1_OFFS(gpii->gpii_id, |
| 1615 | gpii_chan->chid), |
| 1616 | 0, |
| 1617 | }, |
| 1618 | { |
| 1619 | gpii->regs, |
| 1620 | GPI_GPII_n_CH_k_SCRATCH_2_OFFS(gpii->gpii_id, |
| 1621 | gpii_chan->chid), |
| 1622 | 0, |
| 1623 | }, |
| 1624 | { |
| 1625 | gpii->regs, |
| 1626 | GPI_GPII_n_CH_k_SCRATCH_3_OFFS(gpii->gpii_id, |
| 1627 | gpii_chan->chid), |
| 1628 | 0, |
| 1629 | }, |
| 1630 | { |
| 1631 | gpii->regs, |
| 1632 | GPI_GPII_n_CH_k_QOS_OFFS(gpii->gpii_id, |
| 1633 | gpii_chan->chid), |
| 1634 | 1, |
| 1635 | }, |
| 1636 | { NULL }, |
| 1637 | }; |
| 1638 | |
| 1639 | GPII_INFO(gpii, gpii_chan->chid, "Enter\n"); |
| 1640 | |
| 1641 | if (send_alloc_cmd) { |
| 1642 | ret = gpi_send_cmd(gpii, gpii_chan, GPI_CH_CMD_ALLOCATE); |
| 1643 | if (ret) { |
| 1644 | GPII_ERR(gpii, gpii_chan->chid, |
| 1645 | "Error with cmd:%s ret:%d\n", |
| 1646 | TO_GPI_CMD_STR(GPI_CH_CMD_ALLOCATE), ret); |
| 1647 | return ret; |
| 1648 | } |
| 1649 | } |
| 1650 | |
| 1651 | /* program channel cntxt registers */ |
| 1652 | for (i = 0; ch_reg[i].base; i++) |
| 1653 | gpi_write_reg(gpii, ch_reg[i].base + ch_reg[i].offset, |
| 1654 | ch_reg[i].val); |
| 1655 | /* flush all the writes */ |
| 1656 | wmb(); |
| 1657 | return 0; |
| 1658 | } |
| 1659 | |
| 1660 | /* allocate and configure event ring */ |
| 1661 | static int gpi_alloc_ev_chan(struct gpii *gpii) |
| 1662 | { |
| 1663 | struct gpi_ring *ring = &gpii->ev_ring; |
| 1664 | int i; |
| 1665 | int ret; |
| 1666 | struct { |
| 1667 | void *base; |
| 1668 | int offset; |
| 1669 | u32 val; |
| 1670 | } ev_reg[] = { |
| 1671 | { |
| 1672 | gpii->ev_cntxt_base_reg, |
| 1673 | CNTXT_0_CONFIG, |
| 1674 | GPI_GPII_n_EV_CH_k_CNTXT_0(ring->el_size, |
| 1675 | GPI_INTTYPE_IRQ, |
| 1676 | GPI_CHTYPE_GPI_EV), |
| 1677 | }, |
| 1678 | { |
| 1679 | gpii->ev_cntxt_base_reg, |
| 1680 | CNTXT_1_R_LENGTH, |
| 1681 | ring->len, |
| 1682 | }, |
| 1683 | { |
| 1684 | gpii->ev_cntxt_base_reg, |
| 1685 | CNTXT_2_RING_BASE_LSB, |
| 1686 | (u32)ring->phys_addr, |
| 1687 | }, |
| 1688 | { |
| 1689 | gpii->ev_cntxt_base_reg, |
| 1690 | CNTXT_3_RING_BASE_MSB, |
Siva Kumar Akkireddi | 15fb394 | 2018-08-02 13:33:35 +0530 | [diff] [blame] | 1691 | MSM_GPI_RING_PHYS_ADDR_UPPER(ring), |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1692 | }, |
| 1693 | { |
| 1694 | /* program db msg with ring base msb */ |
| 1695 | gpii->ev_cntxt_db_reg, |
| 1696 | CNTXT_5_RING_RP_MSB - CNTXT_4_RING_RP_LSB, |
Siva Kumar Akkireddi | 15fb394 | 2018-08-02 13:33:35 +0530 | [diff] [blame] | 1697 | MSM_GPI_RING_PHYS_ADDR_UPPER(ring), |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1698 | }, |
| 1699 | { |
| 1700 | gpii->ev_cntxt_base_reg, |
| 1701 | CNTXT_8_RING_INT_MOD, |
| 1702 | 0, |
| 1703 | }, |
| 1704 | { |
| 1705 | gpii->ev_cntxt_base_reg, |
| 1706 | CNTXT_10_RING_MSI_LSB, |
| 1707 | 0, |
| 1708 | }, |
| 1709 | { |
| 1710 | gpii->ev_cntxt_base_reg, |
| 1711 | CNTXT_11_RING_MSI_MSB, |
| 1712 | 0, |
| 1713 | }, |
| 1714 | { |
| 1715 | gpii->ev_cntxt_base_reg, |
| 1716 | CNTXT_8_RING_INT_MOD, |
| 1717 | 0, |
| 1718 | }, |
| 1719 | { |
| 1720 | gpii->ev_cntxt_base_reg, |
| 1721 | CNTXT_12_RING_RP_UPDATE_LSB, |
| 1722 | 0, |
| 1723 | }, |
| 1724 | { |
| 1725 | gpii->ev_cntxt_base_reg, |
| 1726 | CNTXT_13_RING_RP_UPDATE_MSB, |
| 1727 | 0, |
| 1728 | }, |
| 1729 | { NULL }, |
| 1730 | }; |
| 1731 | |
| 1732 | GPII_INFO(gpii, GPI_DBG_COMMON, "enter\n"); |
| 1733 | |
| 1734 | ret = gpi_send_cmd(gpii, NULL, GPI_EV_CMD_ALLOCATE); |
| 1735 | if (ret) { |
| 1736 | GPII_ERR(gpii, GPI_DBG_COMMON, "error with cmd:%s ret:%d\n", |
| 1737 | TO_GPI_CMD_STR(GPI_EV_CMD_ALLOCATE), ret); |
| 1738 | return ret; |
| 1739 | } |
| 1740 | |
| 1741 | /* program event context */ |
| 1742 | for (i = 0; ev_reg[i].base; i++) |
| 1743 | gpi_write_reg(gpii, ev_reg[i].base + ev_reg[i].offset, |
| 1744 | ev_reg[i].val); |
| 1745 | |
| 1746 | /* add events to ring */ |
| 1747 | ring->wp = (ring->base + ring->len - ring->el_size); |
| 1748 | |
| 1749 | /* flush all the writes */ |
| 1750 | wmb(); |
| 1751 | |
| 1752 | /* gpii is active now */ |
| 1753 | write_lock_irq(&gpii->pm_lock); |
| 1754 | gpii->pm_state = ACTIVE_STATE; |
| 1755 | write_unlock_irq(&gpii->pm_lock); |
| 1756 | gpi_write_ev_db(gpii, ring, ring->wp); |
| 1757 | |
| 1758 | return 0; |
| 1759 | } |
| 1760 | |
| 1761 | /* calculate # of ERE/TRE available to queue */ |
| 1762 | static int gpi_ring_num_elements_avail(const struct gpi_ring * const ring) |
| 1763 | { |
| 1764 | int elements = 0; |
| 1765 | |
| 1766 | if (ring->wp < ring->rp) |
| 1767 | elements = ((ring->rp - ring->wp) / ring->el_size) - 1; |
| 1768 | else { |
| 1769 | elements = (ring->rp - ring->base) / ring->el_size; |
| 1770 | elements += ((ring->base + ring->len - ring->wp) / |
| 1771 | ring->el_size) - 1; |
| 1772 | } |
| 1773 | |
| 1774 | return elements; |
| 1775 | } |
| 1776 | |
| 1777 | static int gpi_ring_add_element(struct gpi_ring *ring, void **wp) |
| 1778 | { |
| 1779 | |
| 1780 | if (gpi_ring_num_elements_avail(ring) <= 0) |
| 1781 | return -ENOMEM; |
| 1782 | |
| 1783 | *wp = ring->wp; |
| 1784 | ring->wp += ring->el_size; |
| 1785 | if (ring->wp >= (ring->base + ring->len)) |
| 1786 | ring->wp = ring->base; |
| 1787 | |
| 1788 | /* visible to other cores */ |
| 1789 | smp_wmb(); |
| 1790 | |
| 1791 | return 0; |
| 1792 | } |
| 1793 | |
| 1794 | static void gpi_ring_recycle_ev_element(struct gpi_ring *ring) |
| 1795 | { |
| 1796 | /* Update the WP */ |
| 1797 | ring->wp += ring->el_size; |
| 1798 | if (ring->wp >= (ring->base + ring->len)) |
| 1799 | ring->wp = ring->base; |
| 1800 | |
| 1801 | /* Update the RP */ |
| 1802 | ring->rp += ring->el_size; |
| 1803 | if (ring->rp >= (ring->base + ring->len)) |
| 1804 | ring->rp = ring->base; |
| 1805 | |
| 1806 | /* visible to other cores */ |
| 1807 | smp_wmb(); |
| 1808 | } |
| 1809 | |
| 1810 | static void gpi_free_ring(struct gpi_ring *ring, |
| 1811 | struct gpii *gpii) |
| 1812 | { |
Sujeev Dias | 8fc2600 | 2017-11-29 20:51:40 -0800 | [diff] [blame] | 1813 | dma_free_coherent(gpii->gpi_dev->dev, ring->alloc_size, |
| 1814 | ring->pre_aligned, ring->dma_handle); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1815 | memset(ring, 0, sizeof(*ring)); |
| 1816 | } |
| 1817 | |
| 1818 | /* allocate memory for transfer and event rings */ |
| 1819 | static int gpi_alloc_ring(struct gpi_ring *ring, |
| 1820 | u32 elements, |
| 1821 | u32 el_size, |
Sujeev Dias | 8fc2600 | 2017-11-29 20:51:40 -0800 | [diff] [blame] | 1822 | struct gpii *gpii) |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1823 | { |
| 1824 | u64 len = elements * el_size; |
| 1825 | int bit; |
| 1826 | |
Sujeev Dias | 8fc2600 | 2017-11-29 20:51:40 -0800 | [diff] [blame] | 1827 | /* ring len must be power of 2 */ |
| 1828 | bit = find_last_bit((unsigned long *)&len, 32); |
| 1829 | if (((1 << bit) - 1) & len) |
| 1830 | bit++; |
| 1831 | len = 1 << bit; |
| 1832 | ring->alloc_size = (len + (len - 1)); |
| 1833 | GPII_INFO(gpii, GPI_DBG_COMMON, |
Siva Kumar Akkireddi | 15fb394 | 2018-08-02 13:33:35 +0530 | [diff] [blame] | 1834 | "#el:%u el_size:%u len:%u actual_len:%llu alloc_size:%zx\n", |
Sujeev Dias | 8fc2600 | 2017-11-29 20:51:40 -0800 | [diff] [blame] | 1835 | elements, el_size, (elements * el_size), len, |
| 1836 | ring->alloc_size); |
| 1837 | ring->pre_aligned = dma_alloc_coherent(gpii->gpi_dev->dev, |
| 1838 | ring->alloc_size, |
| 1839 | &ring->dma_handle, GFP_KERNEL); |
| 1840 | if (!ring->pre_aligned) { |
| 1841 | GPII_CRITIC(gpii, GPI_DBG_COMMON, |
Siva Kumar Akkireddi | 15fb394 | 2018-08-02 13:33:35 +0530 | [diff] [blame] | 1842 | "could not alloc size:%zx mem for ring\n", |
Sujeev Dias | 8fc2600 | 2017-11-29 20:51:40 -0800 | [diff] [blame] | 1843 | ring->alloc_size); |
| 1844 | return -ENOMEM; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1845 | } |
| 1846 | |
Sujeev Dias | 8fc2600 | 2017-11-29 20:51:40 -0800 | [diff] [blame] | 1847 | /* align the physical mem */ |
| 1848 | ring->phys_addr = (ring->dma_handle + (len - 1)) & ~(len - 1); |
| 1849 | ring->base = ring->pre_aligned + (ring->phys_addr - ring->dma_handle); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1850 | ring->rp = ring->base; |
| 1851 | ring->wp = ring->base; |
| 1852 | ring->len = len; |
| 1853 | ring->el_size = el_size; |
| 1854 | ring->elements = ring->len / ring->el_size; |
| 1855 | memset(ring->base, 0, ring->len); |
| 1856 | ring->configured = true; |
| 1857 | |
| 1858 | /* update to other cores */ |
| 1859 | smp_wmb(); |
| 1860 | |
| 1861 | GPII_INFO(gpii, GPI_DBG_COMMON, |
Siva Kumar Akkireddi | 15fb394 | 2018-08-02 13:33:35 +0530 | [diff] [blame] | 1862 | "phy_pre:%pad phy_alig:%pa len:%u el_size:%u elements:%u\n", |
| 1863 | &ring->dma_handle, &ring->phys_addr, ring->len, ring->el_size, |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1864 | ring->elements); |
| 1865 | |
| 1866 | return 0; |
| 1867 | } |
| 1868 | |
| 1869 | /* copy tre into transfer ring */ |
| 1870 | static void gpi_queue_xfer(struct gpii *gpii, |
| 1871 | struct gpii_chan *gpii_chan, |
| 1872 | struct msm_gpi_tre *gpi_tre, |
Sujeev Dias | 8fc2600 | 2017-11-29 20:51:40 -0800 | [diff] [blame] | 1873 | void **wp) |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1874 | { |
| 1875 | struct msm_gpi_tre *ch_tre; |
| 1876 | int ret; |
| 1877 | |
| 1878 | /* get next tre location we can copy */ |
| 1879 | ret = gpi_ring_add_element(&gpii_chan->ch_ring, (void **)&ch_tre); |
| 1880 | if (unlikely(ret)) { |
| 1881 | GPII_CRITIC(gpii, gpii_chan->chid, |
| 1882 | "Error adding ring element to xfer ring\n"); |
| 1883 | return; |
| 1884 | } |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1885 | |
| 1886 | /* copy the tre info */ |
| 1887 | memcpy(ch_tre, gpi_tre, sizeof(*ch_tre)); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 1888 | *wp = ch_tre; |
| 1889 | } |
| 1890 | |
| 1891 | /* reset and restart transfer channel */ |
| 1892 | int gpi_terminate_all(struct dma_chan *chan) |
| 1893 | { |
| 1894 | struct gpii_chan *gpii_chan = to_gpii_chan(chan); |
| 1895 | struct gpii *gpii = gpii_chan->gpii; |
| 1896 | int schid, echid, i; |
| 1897 | int ret = 0; |
| 1898 | |
| 1899 | GPII_INFO(gpii, gpii_chan->chid, "Enter\n"); |
| 1900 | mutex_lock(&gpii->ctrl_lock); |
| 1901 | |
| 1902 | /* |
| 1903 | * treat both channels as a group if its protocol is not UART |
| 1904 | * STOP, RESET, or START needs to be in lockstep |
| 1905 | */ |
| 1906 | schid = (gpii->protocol == SE_PROTOCOL_UART) ? gpii_chan->chid : 0; |
| 1907 | echid = (gpii->protocol == SE_PROTOCOL_UART) ? schid + 1 : |
| 1908 | MAX_CHANNELS_PER_GPII; |
| 1909 | |
| 1910 | /* stop the channel */ |
| 1911 | for (i = schid; i < echid; i++) { |
| 1912 | gpii_chan = &gpii->gpii_chan[i]; |
| 1913 | |
| 1914 | /* disable ch state so no more TRE processing */ |
| 1915 | write_lock_irq(&gpii->pm_lock); |
| 1916 | gpii_chan->pm_state = PREPARE_TERMINATE; |
| 1917 | write_unlock_irq(&gpii->pm_lock); |
| 1918 | |
| 1919 | /* send command to Stop the channel */ |
| 1920 | ret = gpi_send_cmd(gpii, gpii_chan, GPI_CH_CMD_STOP); |
| 1921 | if (ret) |
| 1922 | GPII_ERR(gpii, gpii_chan->chid, |
| 1923 | "Error Stopping Channel:%d resetting anyway\n", |
| 1924 | ret); |
| 1925 | } |
| 1926 | |
| 1927 | /* reset the channels (clears any pending tre) */ |
| 1928 | for (i = schid; i < echid; i++) { |
| 1929 | gpii_chan = &gpii->gpii_chan[i]; |
| 1930 | |
| 1931 | ret = gpi_reset_chan(gpii_chan, GPI_CH_CMD_RESET); |
| 1932 | if (ret) { |
| 1933 | GPII_ERR(gpii, gpii_chan->chid, |
| 1934 | "Error resetting channel ret:%d\n", ret); |
| 1935 | goto terminate_exit; |
| 1936 | } |
| 1937 | |
| 1938 | /* reprogram channel CNTXT */ |
| 1939 | ret = gpi_alloc_chan(gpii_chan, false); |
| 1940 | if (ret) { |
| 1941 | GPII_ERR(gpii, gpii_chan->chid, |
| 1942 | "Error alloc_channel ret:%d\n", ret); |
| 1943 | goto terminate_exit; |
| 1944 | } |
| 1945 | } |
| 1946 | |
| 1947 | /* restart the channels */ |
| 1948 | for (i = schid; i < echid; i++) { |
| 1949 | gpii_chan = &gpii->gpii_chan[i]; |
| 1950 | |
| 1951 | ret = gpi_start_chan(gpii_chan); |
| 1952 | if (ret) { |
| 1953 | GPII_ERR(gpii, gpii_chan->chid, |
| 1954 | "Error Starting Channel ret:%d\n", ret); |
| 1955 | goto terminate_exit; |
| 1956 | } |
| 1957 | } |
| 1958 | |
| 1959 | terminate_exit: |
| 1960 | mutex_unlock(&gpii->ctrl_lock); |
| 1961 | return ret; |
| 1962 | } |
| 1963 | |
| 1964 | /* pause dma transfer for all channels */ |
| 1965 | static int gpi_pause(struct dma_chan *chan) |
| 1966 | { |
| 1967 | struct gpii_chan *gpii_chan = to_gpii_chan(chan); |
| 1968 | struct gpii *gpii = gpii_chan->gpii; |
| 1969 | int i, ret; |
| 1970 | |
| 1971 | GPII_INFO(gpii, gpii_chan->chid, "Enter\n"); |
| 1972 | mutex_lock(&gpii->ctrl_lock); |
| 1973 | |
| 1974 | /* |
| 1975 | * pause/resume are per gpii not per channel, so |
| 1976 | * client needs to call pause only once |
| 1977 | */ |
| 1978 | if (gpii->pm_state == PAUSE_STATE) { |
| 1979 | GPII_INFO(gpii, gpii_chan->chid, |
| 1980 | "channel is already paused\n"); |
| 1981 | mutex_unlock(&gpii->ctrl_lock); |
| 1982 | return 0; |
| 1983 | } |
| 1984 | |
| 1985 | /* send stop command to stop the channels */ |
| 1986 | for (i = 0; i < MAX_CHANNELS_PER_GPII; i++) { |
| 1987 | ret = gpi_send_cmd(gpii, &gpii->gpii_chan[i], GPI_CH_CMD_STOP); |
| 1988 | if (ret) { |
| 1989 | GPII_ERR(gpii, gpii->gpii_chan[i].chid, |
| 1990 | "Error stopping chan, ret:%d\n", ret); |
| 1991 | mutex_unlock(&gpii->ctrl_lock); |
| 1992 | return ret; |
| 1993 | } |
| 1994 | } |
| 1995 | |
| 1996 | disable_irq(gpii->irq); |
| 1997 | |
| 1998 | /* Wait for threads to complete out */ |
| 1999 | tasklet_kill(&gpii->ev_task); |
| 2000 | |
| 2001 | write_lock_irq(&gpii->pm_lock); |
| 2002 | gpii->pm_state = PAUSE_STATE; |
| 2003 | write_unlock_irq(&gpii->pm_lock); |
| 2004 | mutex_unlock(&gpii->ctrl_lock); |
| 2005 | |
| 2006 | return 0; |
| 2007 | } |
| 2008 | |
| 2009 | /* resume dma transfer */ |
| 2010 | static int gpi_resume(struct dma_chan *chan) |
| 2011 | { |
| 2012 | struct gpii_chan *gpii_chan = to_gpii_chan(chan); |
| 2013 | struct gpii *gpii = gpii_chan->gpii; |
| 2014 | int i; |
| 2015 | int ret; |
| 2016 | |
| 2017 | GPII_INFO(gpii, gpii_chan->chid, "enter\n"); |
| 2018 | |
| 2019 | mutex_lock(&gpii->ctrl_lock); |
| 2020 | if (gpii->pm_state == ACTIVE_STATE) { |
| 2021 | GPII_INFO(gpii, gpii_chan->chid, |
| 2022 | "channel is already active\n"); |
| 2023 | mutex_unlock(&gpii->ctrl_lock); |
| 2024 | return 0; |
| 2025 | } |
| 2026 | |
| 2027 | enable_irq(gpii->irq); |
| 2028 | |
| 2029 | /* send start command to start the channels */ |
| 2030 | for (i = 0; i < MAX_CHANNELS_PER_GPII; i++) { |
| 2031 | ret = gpi_send_cmd(gpii, &gpii->gpii_chan[i], GPI_CH_CMD_START); |
| 2032 | if (ret) { |
| 2033 | GPII_ERR(gpii, gpii->gpii_chan[i].chid, |
| 2034 | "Erro starting chan, ret:%d\n", ret); |
| 2035 | mutex_unlock(&gpii->ctrl_lock); |
| 2036 | return ret; |
| 2037 | } |
| 2038 | } |
| 2039 | |
| 2040 | write_lock_irq(&gpii->pm_lock); |
| 2041 | gpii->pm_state = ACTIVE_STATE; |
| 2042 | write_unlock_irq(&gpii->pm_lock); |
| 2043 | mutex_unlock(&gpii->ctrl_lock); |
| 2044 | |
| 2045 | return 0; |
| 2046 | } |
| 2047 | |
| 2048 | void gpi_desc_free(struct virt_dma_desc *vd) |
| 2049 | { |
| 2050 | struct gpi_desc *gpi_desc = to_gpi_desc(vd); |
| 2051 | |
| 2052 | kfree(gpi_desc); |
| 2053 | } |
| 2054 | |
| 2055 | /* copy tre into transfer ring */ |
| 2056 | struct dma_async_tx_descriptor *gpi_prep_slave_sg(struct dma_chan *chan, |
| 2057 | struct scatterlist *sgl, |
| 2058 | unsigned int sg_len, |
| 2059 | enum dma_transfer_direction direction, |
| 2060 | unsigned long flags, |
| 2061 | void *context) |
| 2062 | { |
| 2063 | struct gpii_chan *gpii_chan = to_gpii_chan(chan); |
| 2064 | struct gpii *gpii = gpii_chan->gpii; |
Sujeev Dias | 8fc2600 | 2017-11-29 20:51:40 -0800 | [diff] [blame] | 2065 | u32 nr; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2066 | u32 nr_req = 0; |
| 2067 | int i, j; |
| 2068 | struct scatterlist *sg; |
| 2069 | struct gpi_ring *ch_ring = &gpii_chan->ch_ring; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2070 | void *tre, *wp = NULL; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2071 | const gfp_t gfp = GFP_ATOMIC; |
| 2072 | struct gpi_desc *gpi_desc; |
Siva Kumar Akkireddi | 15fb394 | 2018-08-02 13:33:35 +0530 | [diff] [blame] | 2073 | #ifdef CONFIG_QCOM_GPI_DMA_DEBUG |
| 2074 | phys_addr_t p_wp, p_rp; |
| 2075 | #endif |
| 2076 | |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2077 | |
| 2078 | GPII_VERB(gpii, gpii_chan->chid, "enter\n"); |
| 2079 | |
| 2080 | if (!is_slave_direction(direction)) { |
| 2081 | GPII_ERR(gpii, gpii_chan->chid, |
| 2082 | "invalid dma direction: %d\n", direction); |
| 2083 | return NULL; |
| 2084 | } |
| 2085 | |
| 2086 | /* calculate # of elements required & available */ |
| 2087 | nr = gpi_ring_num_elements_avail(ch_ring); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2088 | for_each_sg(sgl, sg, sg_len, i) { |
| 2089 | GPII_VERB(gpii, gpii_chan->chid, |
| 2090 | "%d of %u len:%u\n", i, sg_len, sg->length); |
| 2091 | nr_req += (sg->length / ch_ring->el_size); |
| 2092 | } |
Sujeev Dias | 8fc2600 | 2017-11-29 20:51:40 -0800 | [diff] [blame] | 2093 | GPII_VERB(gpii, gpii_chan->chid, "el avail:%u req:%u\n", nr, nr_req); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2094 | |
Sujeev Dias | 8fc2600 | 2017-11-29 20:51:40 -0800 | [diff] [blame] | 2095 | if (nr < nr_req) { |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2096 | GPII_ERR(gpii, gpii_chan->chid, |
Sujeev Dias | 8fc2600 | 2017-11-29 20:51:40 -0800 | [diff] [blame] | 2097 | "not enough space in ring, avail:%u required:%u\n", |
| 2098 | nr, nr_req); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2099 | return NULL; |
| 2100 | } |
| 2101 | |
| 2102 | gpi_desc = kzalloc(sizeof(*gpi_desc), gfp); |
| 2103 | if (!gpi_desc) { |
| 2104 | GPII_ERR(gpii, gpii_chan->chid, |
| 2105 | "out of memory for descriptor\n"); |
| 2106 | return NULL; |
| 2107 | } |
| 2108 | |
| 2109 | /* copy each tre into transfer ring */ |
| 2110 | for_each_sg(sgl, sg, sg_len, i) |
| 2111 | for (j = 0, tre = sg_virt(sg); j < sg->length; |
| 2112 | j += ch_ring->el_size, tre += ch_ring->el_size) |
Sujeev Dias | 8fc2600 | 2017-11-29 20:51:40 -0800 | [diff] [blame] | 2113 | gpi_queue_xfer(gpii, gpii_chan, tre, &wp); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2114 | |
| 2115 | /* set up the descriptor */ |
| 2116 | gpi_desc->db = ch_ring->wp; |
| 2117 | gpi_desc->wp = wp; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2118 | gpi_desc->gpii_chan = gpii_chan; |
Siva Kumar Akkireddi | 15fb394 | 2018-08-02 13:33:35 +0530 | [diff] [blame] | 2119 | #ifdef CONFIG_QCOM_GPI_DMA_DEBUG |
| 2120 | p_wp = to_physical(ch_ring, ch_ring->wp); |
| 2121 | p_rp = to_physical(ch_ring, ch_ring->rp); |
| 2122 | #endif |
| 2123 | GPII_VERB(gpii, gpii_chan->chid, "exit wp:%pa rp:%pa\n", |
| 2124 | &p_wp, &p_rp); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2125 | |
| 2126 | return vchan_tx_prep(&gpii_chan->vc, &gpi_desc->vd, flags); |
| 2127 | } |
| 2128 | |
| 2129 | /* rings transfer ring db to being transfer */ |
| 2130 | static void gpi_issue_pending(struct dma_chan *chan) |
| 2131 | { |
| 2132 | struct gpii_chan *gpii_chan = to_gpii_chan(chan); |
| 2133 | struct gpii *gpii = gpii_chan->gpii; |
| 2134 | unsigned long flags, pm_lock_flags; |
| 2135 | struct virt_dma_desc *vd = NULL; |
| 2136 | struct gpi_desc *gpi_desc; |
| 2137 | |
| 2138 | GPII_VERB(gpii, gpii_chan->chid, "Enter\n"); |
| 2139 | |
| 2140 | read_lock_irqsave(&gpii->pm_lock, pm_lock_flags); |
| 2141 | |
| 2142 | /* move all submitted discriptors to issued list */ |
| 2143 | spin_lock_irqsave(&gpii_chan->vc.lock, flags); |
| 2144 | if (vchan_issue_pending(&gpii_chan->vc)) |
| 2145 | vd = list_last_entry(&gpii_chan->vc.desc_issued, |
| 2146 | struct virt_dma_desc, node); |
| 2147 | spin_unlock_irqrestore(&gpii_chan->vc.lock, flags); |
| 2148 | |
| 2149 | /* nothing to do list is empty */ |
| 2150 | if (!vd) { |
| 2151 | read_unlock_irqrestore(&gpii->pm_lock, pm_lock_flags); |
| 2152 | GPII_VERB(gpii, gpii_chan->chid, "no descriptors submitted\n"); |
| 2153 | return; |
| 2154 | } |
| 2155 | |
| 2156 | gpi_desc = to_gpi_desc(vd); |
| 2157 | gpi_write_ch_db(gpii_chan, &gpii_chan->ch_ring, gpi_desc->db); |
| 2158 | read_unlock_irqrestore(&gpii->pm_lock, pm_lock_flags); |
| 2159 | } |
| 2160 | |
| 2161 | /* configure or issue async command */ |
| 2162 | static int gpi_config(struct dma_chan *chan, |
| 2163 | struct dma_slave_config *config) |
| 2164 | { |
| 2165 | struct gpii_chan *gpii_chan = to_gpii_chan(chan); |
| 2166 | struct gpii *gpii = gpii_chan->gpii; |
| 2167 | struct msm_gpi_ctrl *gpi_ctrl = chan->private; |
| 2168 | const int ev_factor = gpii->gpi_dev->ev_factor; |
| 2169 | u32 elements; |
| 2170 | int i = 0; |
| 2171 | int ret = 0; |
| 2172 | |
| 2173 | GPII_INFO(gpii, gpii_chan->chid, "enter\n"); |
| 2174 | if (!gpi_ctrl) { |
| 2175 | GPII_ERR(gpii, gpii_chan->chid, |
| 2176 | "no config ctrl data provided"); |
| 2177 | return -EINVAL; |
| 2178 | } |
| 2179 | |
| 2180 | mutex_lock(&gpii->ctrl_lock); |
| 2181 | |
| 2182 | switch (gpi_ctrl->cmd) { |
| 2183 | case MSM_GPI_INIT: |
| 2184 | GPII_INFO(gpii, gpii_chan->chid, "cmd: msm_gpi_init\n"); |
| 2185 | |
| 2186 | gpii_chan->client_info.callback = gpi_ctrl->init.callback; |
| 2187 | gpii_chan->client_info.cb_param = gpi_ctrl->init.cb_param; |
| 2188 | gpii_chan->pm_state = CONFIG_STATE; |
| 2189 | |
| 2190 | /* check if both channels are configured before continue */ |
| 2191 | for (i = 0; i < MAX_CHANNELS_PER_GPII; i++) |
| 2192 | if (gpii->gpii_chan[i].pm_state != CONFIG_STATE) |
| 2193 | goto exit_gpi_init; |
| 2194 | |
| 2195 | /* configure to highest priority from two channels */ |
| 2196 | gpii->ev_priority = min(gpii->gpii_chan[0].priority, |
| 2197 | gpii->gpii_chan[1].priority); |
| 2198 | |
| 2199 | /* protocol must be same for both channels */ |
| 2200 | if (gpii->gpii_chan[0].protocol != |
| 2201 | gpii->gpii_chan[1].protocol) { |
| 2202 | GPII_ERR(gpii, gpii_chan->chid, |
| 2203 | "protocol did not match protocol %u != %u\n", |
| 2204 | gpii->gpii_chan[0].protocol, |
| 2205 | gpii->gpii_chan[1].protocol); |
| 2206 | ret = -EINVAL; |
| 2207 | goto exit_gpi_init; |
| 2208 | } |
| 2209 | gpii->protocol = gpii_chan->protocol; |
| 2210 | |
| 2211 | /* allocate memory for event ring */ |
| 2212 | elements = max(gpii->gpii_chan[0].req_tres, |
| 2213 | gpii->gpii_chan[1].req_tres); |
| 2214 | ret = gpi_alloc_ring(&gpii->ev_ring, elements << ev_factor, |
Sujeev Dias | 8fc2600 | 2017-11-29 20:51:40 -0800 | [diff] [blame] | 2215 | sizeof(union gpi_event), gpii); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2216 | if (ret) { |
| 2217 | GPII_ERR(gpii, gpii_chan->chid, |
| 2218 | "error allocating mem for ev ring\n"); |
| 2219 | goto exit_gpi_init; |
| 2220 | } |
| 2221 | |
| 2222 | /* configure interrupts */ |
| 2223 | write_lock_irq(&gpii->pm_lock); |
| 2224 | gpii->pm_state = PREPARE_HARDWARE; |
| 2225 | write_unlock_irq(&gpii->pm_lock); |
| 2226 | ret = gpi_config_interrupts(gpii, DEFAULT_IRQ_SETTINGS, 0); |
| 2227 | if (ret) { |
| 2228 | GPII_ERR(gpii, gpii_chan->chid, |
| 2229 | "error config. interrupts, ret:%d\n", ret); |
| 2230 | goto error_config_int; |
| 2231 | } |
| 2232 | |
| 2233 | /* allocate event rings */ |
| 2234 | ret = gpi_alloc_ev_chan(gpii); |
| 2235 | if (ret) { |
| 2236 | GPII_ERR(gpii, gpii_chan->chid, |
| 2237 | "error alloc_ev_chan:%d\n", ret); |
| 2238 | goto error_alloc_ev_ring; |
| 2239 | } |
| 2240 | |
| 2241 | /* Allocate all channels */ |
| 2242 | for (i = 0; i < MAX_CHANNELS_PER_GPII; i++) { |
| 2243 | ret = gpi_alloc_chan(&gpii->gpii_chan[i], true); |
| 2244 | if (ret) { |
| 2245 | GPII_ERR(gpii, gpii->gpii_chan[i].chid, |
| 2246 | "Error allocating chan:%d\n", ret); |
| 2247 | goto error_alloc_chan; |
| 2248 | } |
| 2249 | } |
| 2250 | |
| 2251 | /* start channels */ |
| 2252 | for (i = 0; i < MAX_CHANNELS_PER_GPII; i++) { |
| 2253 | ret = gpi_start_chan(&gpii->gpii_chan[i]); |
| 2254 | if (ret) { |
| 2255 | GPII_ERR(gpii, gpii->gpii_chan[i].chid, |
| 2256 | "Error start chan:%d\n", ret); |
| 2257 | goto error_start_chan; |
| 2258 | } |
| 2259 | } |
| 2260 | |
| 2261 | break; |
| 2262 | case MSM_GPI_CMD_UART_SW_STALE: |
| 2263 | GPII_INFO(gpii, gpii_chan->chid, "sending UART SW STALE cmd\n"); |
| 2264 | ret = gpi_send_cmd(gpii, gpii_chan, GPI_CH_CMD_UART_SW_STALE); |
| 2265 | break; |
| 2266 | case MSM_GPI_CMD_UART_RFR_READY: |
| 2267 | GPII_INFO(gpii, gpii_chan->chid, |
| 2268 | "sending UART RFR READY cmd\n"); |
| 2269 | ret = gpi_send_cmd(gpii, gpii_chan, GPI_CH_CMD_UART_RFR_READY); |
| 2270 | break; |
| 2271 | case MSM_GPI_CMD_UART_RFR_NOT_READY: |
| 2272 | GPII_INFO(gpii, gpii_chan->chid, |
| 2273 | "sending UART RFR READY NOT READY cmd\n"); |
| 2274 | ret = gpi_send_cmd(gpii, gpii_chan, |
| 2275 | GPI_CH_CMD_UART_RFR_NOT_READY); |
| 2276 | break; |
| 2277 | default: |
| 2278 | GPII_ERR(gpii, gpii_chan->chid, |
| 2279 | "unsupported ctrl cmd:%d\n", gpi_ctrl->cmd); |
| 2280 | ret = -EINVAL; |
| 2281 | } |
| 2282 | |
| 2283 | mutex_unlock(&gpii->ctrl_lock); |
| 2284 | return ret; |
| 2285 | |
| 2286 | error_start_chan: |
| 2287 | for (i = i - 1; i >= 0; i++) { |
| 2288 | gpi_send_cmd(gpii, gpii_chan, GPI_CH_CMD_STOP); |
| 2289 | gpi_send_cmd(gpii, gpii_chan, GPI_CH_CMD_RESET); |
| 2290 | } |
| 2291 | i = 2; |
| 2292 | error_alloc_chan: |
| 2293 | for (i = i - 1; i >= 0; i--) |
| 2294 | gpi_reset_chan(gpii_chan, GPI_CH_CMD_DE_ALLOC); |
| 2295 | error_alloc_ev_ring: |
| 2296 | gpi_disable_interrupts(gpii); |
| 2297 | error_config_int: |
| 2298 | gpi_free_ring(&gpii->ev_ring, gpii); |
| 2299 | exit_gpi_init: |
| 2300 | mutex_unlock(&gpii->ctrl_lock); |
| 2301 | return ret; |
| 2302 | } |
| 2303 | |
| 2304 | /* release all channel resources */ |
| 2305 | static void gpi_free_chan_resources(struct dma_chan *chan) |
| 2306 | { |
| 2307 | struct gpii_chan *gpii_chan = to_gpii_chan(chan); |
| 2308 | struct gpii *gpii = gpii_chan->gpii; |
| 2309 | enum gpi_pm_state cur_state; |
| 2310 | int ret, i; |
| 2311 | |
| 2312 | GPII_INFO(gpii, gpii_chan->chid, "enter\n"); |
| 2313 | |
| 2314 | mutex_lock(&gpii->ctrl_lock); |
| 2315 | |
| 2316 | cur_state = gpii_chan->pm_state; |
| 2317 | |
| 2318 | /* disable ch state so no more TRE processing for this channel */ |
| 2319 | write_lock_irq(&gpii->pm_lock); |
| 2320 | gpii_chan->pm_state = PREPARE_TERMINATE; |
| 2321 | write_unlock_irq(&gpii->pm_lock); |
| 2322 | |
| 2323 | /* attemp to do graceful hardware shutdown */ |
| 2324 | if (cur_state == ACTIVE_STATE) { |
| 2325 | ret = gpi_send_cmd(gpii, gpii_chan, GPI_CH_CMD_STOP); |
| 2326 | if (ret) |
| 2327 | GPII_ERR(gpii, gpii_chan->chid, |
| 2328 | "error stopping channel:%d\n", ret); |
| 2329 | |
| 2330 | ret = gpi_send_cmd(gpii, gpii_chan, GPI_CH_CMD_RESET); |
| 2331 | if (ret) |
| 2332 | GPII_ERR(gpii, gpii_chan->chid, |
| 2333 | "error resetting channel:%d\n", ret); |
| 2334 | |
| 2335 | gpi_reset_chan(gpii_chan, GPI_CH_CMD_DE_ALLOC); |
| 2336 | } |
| 2337 | |
| 2338 | /* free all allocated memory */ |
| 2339 | gpi_free_ring(&gpii_chan->ch_ring, gpii); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2340 | vchan_free_chan_resources(&gpii_chan->vc); |
| 2341 | |
| 2342 | write_lock_irq(&gpii->pm_lock); |
| 2343 | gpii_chan->pm_state = DISABLE_STATE; |
| 2344 | write_unlock_irq(&gpii->pm_lock); |
| 2345 | |
| 2346 | /* if other rings are still active exit */ |
| 2347 | for (i = 0; i < MAX_CHANNELS_PER_GPII; i++) |
| 2348 | if (gpii->gpii_chan[i].ch_ring.configured) |
| 2349 | goto exit_free; |
| 2350 | |
| 2351 | GPII_INFO(gpii, gpii_chan->chid, "disabling gpii\n"); |
| 2352 | |
| 2353 | /* deallocate EV Ring */ |
| 2354 | cur_state = gpii->pm_state; |
| 2355 | write_lock_irq(&gpii->pm_lock); |
| 2356 | gpii->pm_state = PREPARE_TERMINATE; |
| 2357 | write_unlock_irq(&gpii->pm_lock); |
| 2358 | |
| 2359 | /* wait for threads to complete out */ |
| 2360 | tasklet_kill(&gpii->ev_task); |
| 2361 | |
| 2362 | /* send command to de allocate event ring */ |
| 2363 | if (cur_state == ACTIVE_STATE) |
| 2364 | gpi_send_cmd(gpii, NULL, GPI_EV_CMD_DEALLOC); |
| 2365 | |
| 2366 | gpi_free_ring(&gpii->ev_ring, gpii); |
| 2367 | |
| 2368 | /* disable interrupts */ |
| 2369 | if (cur_state == ACTIVE_STATE) |
| 2370 | gpi_disable_interrupts(gpii); |
| 2371 | |
| 2372 | /* set final state to disable */ |
| 2373 | write_lock_irq(&gpii->pm_lock); |
| 2374 | gpii->pm_state = DISABLE_STATE; |
| 2375 | write_unlock_irq(&gpii->pm_lock); |
| 2376 | |
| 2377 | exit_free: |
| 2378 | mutex_unlock(&gpii->ctrl_lock); |
| 2379 | } |
| 2380 | |
| 2381 | /* allocate channel resources */ |
| 2382 | static int gpi_alloc_chan_resources(struct dma_chan *chan) |
| 2383 | { |
| 2384 | struct gpii_chan *gpii_chan = to_gpii_chan(chan); |
| 2385 | struct gpii *gpii = gpii_chan->gpii; |
| 2386 | int ret; |
| 2387 | |
| 2388 | GPII_INFO(gpii, gpii_chan->chid, "enter\n"); |
| 2389 | |
| 2390 | mutex_lock(&gpii->ctrl_lock); |
| 2391 | |
| 2392 | /* allocate memory for transfer ring */ |
| 2393 | ret = gpi_alloc_ring(&gpii_chan->ch_ring, gpii_chan->req_tres, |
Sujeev Dias | 8fc2600 | 2017-11-29 20:51:40 -0800 | [diff] [blame] | 2394 | sizeof(struct msm_gpi_tre), gpii); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2395 | if (ret) { |
| 2396 | GPII_ERR(gpii, gpii_chan->chid, |
| 2397 | "error allocating xfer ring, ret:%d\n", ret); |
| 2398 | goto xfer_alloc_err; |
| 2399 | } |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2400 | mutex_unlock(&gpii->ctrl_lock); |
| 2401 | |
| 2402 | return 0; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2403 | xfer_alloc_err: |
| 2404 | mutex_unlock(&gpii->ctrl_lock); |
| 2405 | |
| 2406 | return ret; |
| 2407 | } |
| 2408 | |
Sujeev Dias | dfe09e1 | 2017-08-31 18:31:04 -0700 | [diff] [blame] | 2409 | static int gpi_find_avail_gpii(struct gpi_dev *gpi_dev, u32 seid) |
| 2410 | { |
| 2411 | int gpii; |
| 2412 | struct gpii_chan *tx_chan, *rx_chan; |
| 2413 | |
| 2414 | /* check if same seid is already configured for another chid */ |
| 2415 | for (gpii = 0; gpii < gpi_dev->max_gpii; gpii++) { |
| 2416 | if (!((1 << gpii) & gpi_dev->gpii_mask)) |
| 2417 | continue; |
| 2418 | |
| 2419 | tx_chan = &gpi_dev->gpiis[gpii].gpii_chan[GPI_TX_CHAN]; |
| 2420 | rx_chan = &gpi_dev->gpiis[gpii].gpii_chan[GPI_RX_CHAN]; |
| 2421 | |
| 2422 | if (rx_chan->vc.chan.client_count && rx_chan->seid == seid) |
| 2423 | return gpii; |
| 2424 | if (tx_chan->vc.chan.client_count && tx_chan->seid == seid) |
| 2425 | return gpii; |
| 2426 | } |
| 2427 | |
| 2428 | /* no channels configured with same seid, return next avail gpii */ |
| 2429 | for (gpii = 0; gpii < gpi_dev->max_gpii; gpii++) { |
| 2430 | if (!((1 << gpii) & gpi_dev->gpii_mask)) |
| 2431 | continue; |
| 2432 | |
| 2433 | tx_chan = &gpi_dev->gpiis[gpii].gpii_chan[GPI_TX_CHAN]; |
| 2434 | rx_chan = &gpi_dev->gpiis[gpii].gpii_chan[GPI_RX_CHAN]; |
| 2435 | |
| 2436 | /* check if gpii is configured */ |
| 2437 | if (tx_chan->vc.chan.client_count || |
| 2438 | rx_chan->vc.chan.client_count) |
| 2439 | continue; |
| 2440 | |
| 2441 | /* found a free gpii */ |
| 2442 | return gpii; |
| 2443 | } |
| 2444 | |
| 2445 | /* no gpii instance available to use */ |
| 2446 | return -EIO; |
| 2447 | } |
| 2448 | |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2449 | /* gpi_of_dma_xlate: open client requested channel */ |
| 2450 | static struct dma_chan *gpi_of_dma_xlate(struct of_phandle_args *args, |
| 2451 | struct of_dma *of_dma) |
| 2452 | { |
| 2453 | struct gpi_dev *gpi_dev = (struct gpi_dev *)of_dma->of_dma_data; |
Sujeev Dias | dfe09e1 | 2017-08-31 18:31:04 -0700 | [diff] [blame] | 2454 | u32 seid, chid; |
| 2455 | int gpii; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2456 | struct gpii_chan *gpii_chan; |
| 2457 | |
| 2458 | if (args->args_count < REQ_OF_DMA_ARGS) { |
| 2459 | GPI_ERR(gpi_dev, |
| 2460 | "gpii require minimum 6 args, client passed:%d args\n", |
| 2461 | args->args_count); |
| 2462 | return NULL; |
| 2463 | } |
| 2464 | |
Sujeev Dias | dfe09e1 | 2017-08-31 18:31:04 -0700 | [diff] [blame] | 2465 | chid = args->args[0]; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2466 | if (chid >= MAX_CHANNELS_PER_GPII) { |
| 2467 | GPI_ERR(gpi_dev, "gpii channel:%d not valid\n", chid); |
| 2468 | return NULL; |
| 2469 | } |
| 2470 | |
Sujeev Dias | dfe09e1 | 2017-08-31 18:31:04 -0700 | [diff] [blame] | 2471 | seid = args->args[1]; |
| 2472 | |
| 2473 | /* find next available gpii to use */ |
| 2474 | gpii = gpi_find_avail_gpii(gpi_dev, seid); |
| 2475 | if (gpii < 0) { |
| 2476 | GPI_ERR(gpi_dev, "no available gpii instances\n"); |
| 2477 | return NULL; |
| 2478 | } |
| 2479 | |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2480 | gpii_chan = &gpi_dev->gpiis[gpii].gpii_chan[chid]; |
Sujeev Dias | dfe09e1 | 2017-08-31 18:31:04 -0700 | [diff] [blame] | 2481 | if (gpii_chan->vc.chan.client_count) { |
| 2482 | GPI_ERR(gpi_dev, "gpii:%d chid:%d seid:%d already configured\n", |
| 2483 | gpii, chid, gpii_chan->seid); |
| 2484 | return NULL; |
| 2485 | } |
| 2486 | |
| 2487 | /* get ring size, protocol, se_id, and priority */ |
| 2488 | gpii_chan->seid = seid; |
| 2489 | gpii_chan->protocol = args->args[2]; |
| 2490 | gpii_chan->req_tres = args->args[3]; |
| 2491 | gpii_chan->priority = args->args[4]; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2492 | |
| 2493 | GPI_LOG(gpi_dev, |
| 2494 | "client req. gpii:%u chid:%u #_tre:%u priority:%u protocol:%u\n", |
| 2495 | gpii, chid, gpii_chan->req_tres, gpii_chan->priority, |
| 2496 | gpii_chan->protocol); |
| 2497 | |
| 2498 | return dma_get_slave_channel(&gpii_chan->vc.chan); |
| 2499 | } |
| 2500 | |
| 2501 | /* gpi_setup_debug - setup debug capabilities */ |
| 2502 | static void gpi_setup_debug(struct gpi_dev *gpi_dev) |
| 2503 | { |
| 2504 | char node_name[GPI_LABEL_SIZE]; |
| 2505 | const umode_t mode = 0600; |
| 2506 | int i; |
| 2507 | |
| 2508 | snprintf(node_name, sizeof(node_name), "%s%llx", GPI_DMA_DRV_NAME, |
| 2509 | (u64)gpi_dev->res->start); |
| 2510 | |
| 2511 | gpi_dev->ilctxt = ipc_log_context_create(IPC_LOG_PAGES, |
| 2512 | node_name, 0); |
| 2513 | gpi_dev->ipc_log_lvl = DEFAULT_IPC_LOG_LVL; |
| 2514 | if (!IS_ERR_OR_NULL(pdentry)) { |
| 2515 | snprintf(node_name, sizeof(node_name), "%llx", |
| 2516 | (u64)gpi_dev->res->start); |
| 2517 | gpi_dev->dentry = debugfs_create_dir(node_name, pdentry); |
| 2518 | if (!IS_ERR_OR_NULL(gpi_dev->dentry)) { |
| 2519 | debugfs_create_u32("ipc_log_lvl", mode, gpi_dev->dentry, |
| 2520 | &gpi_dev->ipc_log_lvl); |
| 2521 | debugfs_create_u32("klog_lvl", mode, |
| 2522 | gpi_dev->dentry, &gpi_dev->klog_lvl); |
| 2523 | } |
| 2524 | } |
| 2525 | |
| 2526 | for (i = 0; i < gpi_dev->max_gpii; i++) { |
| 2527 | struct gpii *gpii; |
| 2528 | |
| 2529 | if (!((1 << i) & gpi_dev->gpii_mask)) |
| 2530 | continue; |
| 2531 | |
| 2532 | gpii = &gpi_dev->gpiis[i]; |
| 2533 | snprintf(gpii->label, sizeof(gpii->label), |
| 2534 | "%s%llx_gpii%d", |
| 2535 | GPI_DMA_DRV_NAME, (u64)gpi_dev->res->start, i); |
| 2536 | gpii->ilctxt = ipc_log_context_create(IPC_LOG_PAGES, |
| 2537 | gpii->label, 0); |
| 2538 | gpii->ipc_log_lvl = DEFAULT_IPC_LOG_LVL; |
| 2539 | gpii->klog_lvl = DEFAULT_KLOG_LVL; |
| 2540 | |
| 2541 | if (IS_ERR_OR_NULL(gpi_dev->dentry)) |
| 2542 | continue; |
| 2543 | |
| 2544 | snprintf(node_name, sizeof(node_name), "gpii%d", i); |
| 2545 | gpii->dentry = debugfs_create_dir(node_name, gpi_dev->dentry); |
| 2546 | if (IS_ERR_OR_NULL(gpii->dentry)) |
| 2547 | continue; |
| 2548 | |
| 2549 | debugfs_create_u32("ipc_log_lvl", mode, gpii->dentry, |
| 2550 | &gpii->ipc_log_lvl); |
| 2551 | debugfs_create_u32("klog_lvl", mode, gpii->dentry, |
| 2552 | &gpii->klog_lvl); |
| 2553 | } |
| 2554 | } |
| 2555 | |
Sujeev Dias | 6948421 | 2017-08-31 10:06:53 -0700 | [diff] [blame] | 2556 | static struct dma_iommu_mapping *gpi_create_mapping(struct gpi_dev *gpi_dev) |
| 2557 | { |
| 2558 | dma_addr_t base; |
| 2559 | size_t size; |
| 2560 | |
| 2561 | /* |
| 2562 | * If S1_BYPASS enabled then iommu space is not used, however framework |
| 2563 | * still require clients to create a mapping space before attaching. So |
| 2564 | * set to smallest size required by iommu framework. |
| 2565 | */ |
| 2566 | if (gpi_dev->smmu_cfg & GPI_SMMU_S1_BYPASS) { |
| 2567 | base = 0; |
| 2568 | size = PAGE_SIZE; |
| 2569 | } else { |
| 2570 | base = gpi_dev->iova_base; |
| 2571 | size = gpi_dev->iova_size; |
| 2572 | } |
| 2573 | |
Siva Kumar Akkireddi | 15fb394 | 2018-08-02 13:33:35 +0530 | [diff] [blame] | 2574 | GPI_LOG(gpi_dev, "Creating iommu mapping of base:%pad size:%zx\n", |
| 2575 | &base, size); |
Sujeev Dias | 6948421 | 2017-08-31 10:06:53 -0700 | [diff] [blame] | 2576 | |
| 2577 | return arm_iommu_create_mapping(&platform_bus_type, base, size); |
| 2578 | } |
| 2579 | |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2580 | static int gpi_smmu_init(struct gpi_dev *gpi_dev) |
| 2581 | { |
Sujeev Dias | 6948421 | 2017-08-31 10:06:53 -0700 | [diff] [blame] | 2582 | struct dma_iommu_mapping *mapping = NULL; |
| 2583 | int ret; |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2584 | |
Sujeev Dias | 6948421 | 2017-08-31 10:06:53 -0700 | [diff] [blame] | 2585 | if (gpi_dev->smmu_cfg) { |
| 2586 | |
| 2587 | /* create mapping table */ |
| 2588 | mapping = gpi_create_mapping(gpi_dev); |
| 2589 | if (IS_ERR(mapping)) { |
| 2590 | GPI_ERR(gpi_dev, |
| 2591 | "Failed to create iommu mapping, ret:%ld\n", |
| 2592 | PTR_ERR(mapping)); |
| 2593 | return PTR_ERR(mapping); |
| 2594 | } |
| 2595 | |
| 2596 | if (gpi_dev->smmu_cfg & GPI_SMMU_S1_BYPASS) { |
| 2597 | int s1_bypass = 1; |
| 2598 | |
| 2599 | ret = iommu_domain_set_attr(mapping->domain, |
| 2600 | DOMAIN_ATTR_S1_BYPASS, &s1_bypass); |
| 2601 | if (ret) { |
| 2602 | GPI_ERR(gpi_dev, |
| 2603 | "Failed to set attr S1_BYPASS, ret:%d\n", |
| 2604 | ret); |
| 2605 | goto release_mapping; |
| 2606 | } |
| 2607 | } |
| 2608 | |
| 2609 | if (gpi_dev->smmu_cfg & GPI_SMMU_FAST) { |
| 2610 | int fast = 1; |
| 2611 | |
| 2612 | ret = iommu_domain_set_attr(mapping->domain, |
| 2613 | DOMAIN_ATTR_FAST, &fast); |
| 2614 | if (ret) { |
| 2615 | GPI_ERR(gpi_dev, |
| 2616 | "Failed to set attr FAST, ret:%d\n", |
| 2617 | ret); |
| 2618 | goto release_mapping; |
| 2619 | } |
| 2620 | } |
| 2621 | |
| 2622 | if (gpi_dev->smmu_cfg & GPI_SMMU_ATOMIC) { |
| 2623 | int atomic = 1; |
| 2624 | |
| 2625 | ret = iommu_domain_set_attr(mapping->domain, |
| 2626 | DOMAIN_ATTR_ATOMIC, &atomic); |
| 2627 | if (ret) { |
| 2628 | GPI_ERR(gpi_dev, |
| 2629 | "Failed to set attr ATOMIC, ret:%d\n", |
| 2630 | ret); |
| 2631 | goto release_mapping; |
| 2632 | } |
| 2633 | } |
| 2634 | |
| 2635 | ret = arm_iommu_attach_device(gpi_dev->dev, mapping); |
| 2636 | if (ret) { |
| 2637 | GPI_ERR(gpi_dev, |
| 2638 | "Failed with iommu_attach, ret:%d\n", ret); |
| 2639 | goto release_mapping; |
| 2640 | } |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2641 | } |
| 2642 | |
Siva Kumar Akkireddi | f14ef34 | 2018-07-20 17:17:55 +0530 | [diff] [blame] | 2643 | GPI_LOG(gpi_dev, "Setting dma mask to 64\n"); |
| 2644 | ret = dma_set_mask(gpi_dev->dev, DMA_BIT_MASK(64)); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2645 | if (ret) { |
Siva Kumar Akkireddi | f14ef34 | 2018-07-20 17:17:55 +0530 | [diff] [blame] | 2646 | GPI_ERR(gpi_dev, "Error setting dma_mask to 64, ret:%d\n", ret); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2647 | goto error_set_mask; |
| 2648 | } |
| 2649 | |
| 2650 | return ret; |
| 2651 | |
| 2652 | error_set_mask: |
Sujeev Dias | 6948421 | 2017-08-31 10:06:53 -0700 | [diff] [blame] | 2653 | if (gpi_dev->smmu_cfg) |
| 2654 | arm_iommu_detach_device(gpi_dev->dev); |
| 2655 | release_mapping: |
| 2656 | if (mapping) |
| 2657 | arm_iommu_release_mapping(mapping); |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2658 | return ret; |
| 2659 | } |
| 2660 | |
| 2661 | static int gpi_probe(struct platform_device *pdev) |
| 2662 | { |
| 2663 | struct gpi_dev *gpi_dev; |
| 2664 | int ret, i; |
| 2665 | |
| 2666 | gpi_dev = devm_kzalloc(&pdev->dev, sizeof(*gpi_dev), GFP_KERNEL); |
| 2667 | if (!gpi_dev) |
| 2668 | return -ENOMEM; |
| 2669 | |
| 2670 | gpi_dev->dev = &pdev->dev; |
| 2671 | gpi_dev->klog_lvl = DEFAULT_KLOG_LVL; |
| 2672 | gpi_dev->res = platform_get_resource_byname(pdev, IORESOURCE_MEM, |
| 2673 | "gpi-top"); |
| 2674 | if (!gpi_dev->res) { |
| 2675 | GPI_ERR(gpi_dev, "missing 'reg' DT node\n"); |
| 2676 | return -EINVAL; |
| 2677 | } |
| 2678 | gpi_dev->regs = devm_ioremap_nocache(gpi_dev->dev, gpi_dev->res->start, |
| 2679 | resource_size(gpi_dev->res)); |
| 2680 | if (!gpi_dev->regs) { |
| 2681 | GPI_ERR(gpi_dev, "IO remap failed\n"); |
| 2682 | return -EFAULT; |
| 2683 | } |
| 2684 | |
| 2685 | ret = of_property_read_u32(gpi_dev->dev->of_node, "qcom,max-num-gpii", |
| 2686 | &gpi_dev->max_gpii); |
| 2687 | if (ret) { |
| 2688 | GPI_ERR(gpi_dev, "missing 'max-no-gpii' DT node\n"); |
| 2689 | return ret; |
| 2690 | } |
| 2691 | |
| 2692 | ret = of_property_read_u32(gpi_dev->dev->of_node, "qcom,gpii-mask", |
| 2693 | &gpi_dev->gpii_mask); |
| 2694 | if (ret) { |
| 2695 | GPI_ERR(gpi_dev, "missing 'gpii-mask' DT node\n"); |
| 2696 | return ret; |
| 2697 | } |
| 2698 | |
| 2699 | ret = of_property_read_u32(gpi_dev->dev->of_node, "qcom,ev-factor", |
| 2700 | &gpi_dev->ev_factor); |
| 2701 | if (ret) { |
| 2702 | GPI_ERR(gpi_dev, "missing 'qcom,ev-factor' DT node\n"); |
| 2703 | return ret; |
| 2704 | } |
| 2705 | |
Sujeev Dias | 6948421 | 2017-08-31 10:06:53 -0700 | [diff] [blame] | 2706 | ret = of_property_read_u32(gpi_dev->dev->of_node, "qcom,smmu-cfg", |
| 2707 | &gpi_dev->smmu_cfg); |
| 2708 | if (ret) { |
| 2709 | GPI_ERR(gpi_dev, "missing 'qcom,smmu-cfg' DT node\n"); |
| 2710 | return ret; |
| 2711 | } |
| 2712 | if (gpi_dev->smmu_cfg && !(gpi_dev->smmu_cfg & GPI_SMMU_S1_BYPASS)) { |
| 2713 | u64 iova_range[2]; |
| 2714 | |
| 2715 | ret = of_property_count_elems_of_size(gpi_dev->dev->of_node, |
| 2716 | "qcom,iova-range", |
| 2717 | sizeof(iova_range)); |
| 2718 | if (ret != 1) { |
| 2719 | GPI_ERR(gpi_dev, |
| 2720 | "missing or incorrect 'qcom,iova-range' DT node ret:%d\n", |
| 2721 | ret); |
| 2722 | } |
| 2723 | |
| 2724 | ret = of_property_read_u64_array(gpi_dev->dev->of_node, |
| 2725 | "qcom,iova-range", iova_range, |
| 2726 | sizeof(iova_range) / sizeof(u64)); |
| 2727 | if (ret) { |
| 2728 | GPI_ERR(gpi_dev, |
| 2729 | "could not read DT prop 'qcom,iova-range\n"); |
| 2730 | return ret; |
| 2731 | } |
| 2732 | gpi_dev->iova_base = iova_range[0]; |
| 2733 | gpi_dev->iova_size = iova_range[1]; |
| 2734 | } |
| 2735 | |
Sujeev Dias | dd66ce0 | 2016-09-07 11:35:11 -0700 | [diff] [blame] | 2736 | ret = gpi_smmu_init(gpi_dev); |
| 2737 | if (ret) { |
| 2738 | GPI_ERR(gpi_dev, "error configuring smmu, ret:%d\n", ret); |
| 2739 | return ret; |
| 2740 | } |
| 2741 | |
| 2742 | gpi_dev->gpiis = devm_kzalloc(gpi_dev->dev, |
| 2743 | sizeof(*gpi_dev->gpiis) * gpi_dev->max_gpii, |
| 2744 | GFP_KERNEL); |
| 2745 | if (!gpi_dev->gpiis) |
| 2746 | return -ENOMEM; |
| 2747 | |
| 2748 | |
| 2749 | /* setup all the supported gpii */ |
| 2750 | INIT_LIST_HEAD(&gpi_dev->dma_device.channels); |
| 2751 | for (i = 0; i < gpi_dev->max_gpii; i++) { |
| 2752 | struct gpii *gpii = &gpi_dev->gpiis[i]; |
| 2753 | int chan; |
| 2754 | |
| 2755 | if (!((1 << i) & gpi_dev->gpii_mask)) |
| 2756 | continue; |
| 2757 | |
| 2758 | /* set up ev cntxt register map */ |
| 2759 | gpii->ev_cntxt_base_reg = gpi_dev->regs + |
| 2760 | GPI_GPII_n_EV_CH_k_CNTXT_0_OFFS(i, 0); |
| 2761 | gpii->ev_cntxt_db_reg = gpi_dev->regs + |
| 2762 | GPI_GPII_n_EV_CH_k_DOORBELL_0_OFFS(i, 0); |
| 2763 | gpii->ev_ring_base_lsb_reg = gpii->ev_cntxt_base_reg + |
| 2764 | CNTXT_2_RING_BASE_LSB; |
| 2765 | gpii->ev_ring_rp_lsb_reg = gpii->ev_cntxt_base_reg + |
| 2766 | CNTXT_4_RING_RP_LSB; |
| 2767 | gpii->ev_ring_wp_lsb_reg = gpii->ev_cntxt_base_reg + |
| 2768 | CNTXT_6_RING_WP_LSB; |
| 2769 | gpii->ev_cmd_reg = gpi_dev->regs + |
| 2770 | GPI_GPII_n_EV_CH_CMD_OFFS(i); |
| 2771 | gpii->ieob_src_reg = gpi_dev->regs + |
| 2772 | GPI_GPII_n_CNTXT_SRC_IEOB_IRQ_OFFS(i); |
| 2773 | gpii->ieob_clr_reg = gpi_dev->regs + |
| 2774 | GPI_GPII_n_CNTXT_SRC_IEOB_IRQ_CLR_OFFS(i); |
| 2775 | |
| 2776 | /* set up irq */ |
| 2777 | ret = platform_get_irq(pdev, i); |
| 2778 | if (ret < 0) { |
| 2779 | GPI_ERR(gpi_dev, "could not req. irq for gpii%d ret:%d", |
| 2780 | i, ret); |
| 2781 | return ret; |
| 2782 | } |
| 2783 | gpii->irq = ret; |
| 2784 | |
| 2785 | /* set up channel specific register info */ |
| 2786 | for (chan = 0; chan < MAX_CHANNELS_PER_GPII; chan++) { |
| 2787 | struct gpii_chan *gpii_chan = &gpii->gpii_chan[chan]; |
| 2788 | |
| 2789 | /* set up ch cntxt register map */ |
| 2790 | gpii_chan->ch_cntxt_base_reg = gpi_dev->regs + |
| 2791 | GPI_GPII_n_CH_k_CNTXT_0_OFFS(i, chan); |
| 2792 | gpii_chan->ch_cntxt_db_reg = gpi_dev->regs + |
| 2793 | GPI_GPII_n_CH_k_DOORBELL_0_OFFS(i, chan); |
| 2794 | gpii_chan->ch_ring_base_lsb_reg = |
| 2795 | gpii_chan->ch_cntxt_base_reg + |
| 2796 | CNTXT_2_RING_BASE_LSB; |
| 2797 | gpii_chan->ch_ring_rp_lsb_reg = |
| 2798 | gpii_chan->ch_cntxt_base_reg + |
| 2799 | CNTXT_4_RING_RP_LSB; |
| 2800 | gpii_chan->ch_ring_wp_lsb_reg = |
| 2801 | gpii_chan->ch_cntxt_base_reg + |
| 2802 | CNTXT_6_RING_WP_LSB; |
| 2803 | gpii_chan->ch_cmd_reg = gpi_dev->regs + |
| 2804 | GPI_GPII_n_CH_CMD_OFFS(i); |
| 2805 | |
| 2806 | /* vchan setup */ |
| 2807 | vchan_init(&gpii_chan->vc, &gpi_dev->dma_device); |
| 2808 | gpii_chan->vc.desc_free = gpi_desc_free; |
| 2809 | gpii_chan->chid = chan; |
| 2810 | gpii_chan->gpii = gpii; |
| 2811 | gpii_chan->dir = GPII_CHAN_DIR[chan]; |
| 2812 | } |
| 2813 | mutex_init(&gpii->ctrl_lock); |
| 2814 | rwlock_init(&gpii->pm_lock); |
| 2815 | tasklet_init(&gpii->ev_task, gpi_ev_tasklet, |
| 2816 | (unsigned long)gpii); |
| 2817 | init_completion(&gpii->cmd_completion); |
| 2818 | gpii->gpii_id = i; |
| 2819 | gpii->regs = gpi_dev->regs; |
| 2820 | gpii->gpi_dev = gpi_dev; |
| 2821 | atomic_set(&gpii->dbg_index, 0); |
| 2822 | } |
| 2823 | |
| 2824 | platform_set_drvdata(pdev, gpi_dev); |
| 2825 | |
| 2826 | /* clear and Set capabilities */ |
| 2827 | dma_cap_zero(gpi_dev->dma_device.cap_mask); |
| 2828 | dma_cap_set(DMA_SLAVE, gpi_dev->dma_device.cap_mask); |
| 2829 | |
| 2830 | /* configure dmaengine apis */ |
| 2831 | gpi_dev->dma_device.directions = |
| 2832 | BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); |
| 2833 | gpi_dev->dma_device.residue_granularity = |
| 2834 | DMA_RESIDUE_GRANULARITY_DESCRIPTOR; |
| 2835 | gpi_dev->dma_device.src_addr_widths = DMA_SLAVE_BUSWIDTH_8_BYTES; |
| 2836 | gpi_dev->dma_device.dst_addr_widths = DMA_SLAVE_BUSWIDTH_8_BYTES; |
| 2837 | gpi_dev->dma_device.device_alloc_chan_resources = |
| 2838 | gpi_alloc_chan_resources; |
| 2839 | gpi_dev->dma_device.device_free_chan_resources = |
| 2840 | gpi_free_chan_resources; |
| 2841 | gpi_dev->dma_device.device_tx_status = dma_cookie_status; |
| 2842 | gpi_dev->dma_device.device_issue_pending = gpi_issue_pending; |
| 2843 | gpi_dev->dma_device.device_prep_slave_sg = gpi_prep_slave_sg; |
| 2844 | gpi_dev->dma_device.device_config = gpi_config; |
| 2845 | gpi_dev->dma_device.device_terminate_all = gpi_terminate_all; |
| 2846 | gpi_dev->dma_device.dev = gpi_dev->dev; |
| 2847 | gpi_dev->dma_device.device_pause = gpi_pause; |
| 2848 | gpi_dev->dma_device.device_resume = gpi_resume; |
| 2849 | |
| 2850 | /* register with dmaengine framework */ |
| 2851 | ret = dma_async_device_register(&gpi_dev->dma_device); |
| 2852 | if (ret) { |
| 2853 | GPI_ERR(gpi_dev, "async_device_register failed ret:%d", ret); |
| 2854 | return ret; |
| 2855 | } |
| 2856 | |
| 2857 | ret = of_dma_controller_register(gpi_dev->dev->of_node, |
| 2858 | gpi_of_dma_xlate, gpi_dev); |
| 2859 | if (ret) { |
| 2860 | GPI_ERR(gpi_dev, "of_dma_controller_reg failed ret:%d", ret); |
| 2861 | return ret; |
| 2862 | } |
| 2863 | |
| 2864 | /* setup debug capabilities */ |
| 2865 | gpi_setup_debug(gpi_dev); |
| 2866 | GPI_LOG(gpi_dev, "probe success\n"); |
| 2867 | |
| 2868 | return ret; |
| 2869 | } |
| 2870 | |
| 2871 | static const struct of_device_id gpi_of_match[] = { |
| 2872 | { .compatible = "qcom,gpi-dma" }, |
| 2873 | {} |
| 2874 | }; |
| 2875 | MODULE_DEVICE_TABLE(of, gpi_of_match); |
| 2876 | |
| 2877 | static struct platform_driver gpi_driver = { |
| 2878 | .probe = gpi_probe, |
| 2879 | .driver = { |
| 2880 | .name = GPI_DMA_DRV_NAME, |
| 2881 | .of_match_table = gpi_of_match, |
| 2882 | }, |
| 2883 | }; |
| 2884 | |
| 2885 | static int __init gpi_init(void) |
| 2886 | { |
| 2887 | pdentry = debugfs_create_dir(GPI_DMA_DRV_NAME, NULL); |
| 2888 | return platform_driver_register(&gpi_driver); |
| 2889 | } |
| 2890 | module_init(gpi_init) |
| 2891 | |
| 2892 | MODULE_DESCRIPTION("QCOM GPI DMA engine driver"); |
| 2893 | MODULE_LICENSE("GPL v2"); |