Hardik Arya | d9f068f | 2019-01-04 16:14:20 +0530 | [diff] [blame^] | 1 | /* Copyright (c) 2014-2019, The Linux Foundation. All rights reserved. |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -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 | #include <linux/debugfs.h> |
| 13 | #include <linux/err.h> |
| 14 | #include <linux/fs.h> |
| 15 | #include <linux/gfp.h> |
| 16 | #include <linux/interrupt.h> |
| 17 | #include <linux/io.h> |
| 18 | #include <linux/ipc_logging.h> |
| 19 | #include <linux/irq.h> |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/kthread.h> |
| 22 | #include <linux/list.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/mutex.h> |
| 25 | #include <linux/of.h> |
| 26 | #include <linux/of_irq.h> |
| 27 | #include <linux/platform_device.h> |
| 28 | #include <linux/printk.h> |
| 29 | #include <linux/sched.h> |
| 30 | #include <linux/seq_file.h> |
| 31 | #include <linux/sizes.h> |
| 32 | #include <linux/slab.h> |
| 33 | #include <linux/spinlock.h> |
| 34 | #include <linux/srcu.h> |
| 35 | #include <linux/wait.h> |
Chris Lew | 490a42a | 2017-10-02 15:20:54 -0700 | [diff] [blame] | 36 | #include <linux/cpumask.h> |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 37 | #include <soc/qcom/smem.h> |
| 38 | #include <soc/qcom/tracer_pkt.h> |
| 39 | #include "glink_core_if.h" |
| 40 | #include "glink_private.h" |
| 41 | #include "glink_xprt_if.h" |
| 42 | |
| 43 | #define XPRT_NAME "smem" |
| 44 | #define FIFO_FULL_RESERVE 8 |
| 45 | #define FIFO_ALIGNMENT 8 |
| 46 | #define TX_BLOCKED_CMD_RESERVE 8 /* size of struct read_notif_request */ |
| 47 | #define SMEM_CH_DESC_SIZE 32 |
| 48 | #define RPM_TOC_ID 0x67727430 |
| 49 | #define RPM_TX_FIFO_ID 0x61703272 |
| 50 | #define RPM_RX_FIFO_ID 0x72326170 |
| 51 | #define RPM_TOC_SIZE 256 |
| 52 | #define RPM_MAX_TOC_ENTRIES 20 |
| 53 | #define RPM_FIFO_ADDR_ALIGN_BYTES 3 |
| 54 | #define TRACER_PKT_FEATURE BIT(2) |
Karthikeyan Ramasubramanian | 8acd272 | 2016-12-09 10:44:34 -0700 | [diff] [blame] | 55 | #define DEFERRED_CMDS_THRESHOLD 25 |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 56 | #define NUM_LOG_PAGES 4 |
| 57 | |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 58 | /** |
| 59 | * enum command_types - definition of the types of commands sent/received |
| 60 | * @VERSION_CMD: Version and feature set supported |
| 61 | * @VERSION_ACK_CMD: Response for @VERSION_CMD |
| 62 | * @OPEN_CMD: Open a channel |
| 63 | * @CLOSE_CMD: Close a channel |
| 64 | * @OPEN_ACK_CMD: Response to @OPEN_CMD |
| 65 | * @RX_INTENT_CMD: RX intent for a channel was queued |
| 66 | * @RX_DONE_CMD: Use of RX intent for a channel is complete |
| 67 | * @RX_INTENT_REQ_CMD: Request to have RX intent queued |
| 68 | * @RX_INTENT_REQ_ACK_CMD: Response for @RX_INTENT_REQ_CMD |
| 69 | * @TX_DATA_CMD: Start of a data transfer |
| 70 | * @ZERO_COPY_TX_DATA_CMD: Start of a data transfer with zero copy |
| 71 | * @CLOSE_ACK_CMD: Response for @CLOSE_CMD |
| 72 | * @TX_DATA_CONT_CMD: Continuation or end of a data transfer |
| 73 | * @READ_NOTIF_CMD: Request for a notification when this cmd is read |
| 74 | * @RX_DONE_W_REUSE_CMD: Same as @RX_DONE but also reuse the used intent |
| 75 | * @SIGNALS_CMD: Sideband signals |
| 76 | * @TRACER_PKT_CMD: Start of a Tracer Packet Command |
| 77 | * @TRACER_PKT_CONT_CMD: Continuation or end of a Tracer Packet Command |
| 78 | */ |
| 79 | enum command_types { |
| 80 | VERSION_CMD, |
| 81 | VERSION_ACK_CMD, |
| 82 | OPEN_CMD, |
| 83 | CLOSE_CMD, |
| 84 | OPEN_ACK_CMD, |
| 85 | RX_INTENT_CMD, |
| 86 | RX_DONE_CMD, |
| 87 | RX_INTENT_REQ_CMD, |
| 88 | RX_INTENT_REQ_ACK_CMD, |
| 89 | TX_DATA_CMD, |
| 90 | ZERO_COPY_TX_DATA_CMD, |
| 91 | CLOSE_ACK_CMD, |
| 92 | TX_DATA_CONT_CMD, |
| 93 | READ_NOTIF_CMD, |
| 94 | RX_DONE_W_REUSE_CMD, |
| 95 | SIGNALS_CMD, |
| 96 | TRACER_PKT_CMD, |
| 97 | TRACER_PKT_CONT_CMD, |
| 98 | }; |
| 99 | |
| 100 | /** |
| 101 | * struct channel_desc - description of a channel fifo with a remote entity |
| 102 | * @read_index: The read index for the fifo where data should be |
| 103 | * consumed from. |
| 104 | * @write_index: The write index for the fifo where data should produced |
| 105 | * to. |
| 106 | * |
| 107 | * This structure resides in SMEM and contains the control information for the |
| 108 | * fifo data pipes of the channel. There is one physical channel between us |
| 109 | * and a remote entity. |
| 110 | */ |
| 111 | struct channel_desc { |
| 112 | uint32_t read_index; |
| 113 | uint32_t write_index; |
| 114 | }; |
| 115 | |
| 116 | /** |
| 117 | * struct mailbox_config_info - description of a mailbox tranposrt channel |
| 118 | * @tx_read_index: Offset into the tx fifo where data should be read from. |
| 119 | * @tx_write_index: Offset into the tx fifo where new data will be placed. |
| 120 | * @tx_size: Size of the transmit fifo in bytes. |
| 121 | * @rx_read_index: Offset into the rx fifo where data should be read from. |
| 122 | * @rx_write_index: Offset into the rx fifo where new data will be placed. |
| 123 | * @rx_size: Size of the receive fifo in bytes. |
| 124 | * @fifo: The fifos for the channel. |
| 125 | */ |
| 126 | struct mailbox_config_info { |
| 127 | uint32_t tx_read_index; |
| 128 | uint32_t tx_write_index; |
| 129 | uint32_t tx_size; |
| 130 | uint32_t rx_read_index; |
| 131 | uint32_t rx_write_index; |
| 132 | uint32_t rx_size; |
| 133 | char fifo[]; /* tx fifo, then rx fifo */ |
| 134 | }; |
| 135 | |
| 136 | /** |
| 137 | * struct edge_info - local information for managing a single complete edge |
| 138 | * @xprt_if: The transport interface registered with the |
| 139 | * glink core associated with this edge. |
| 140 | * @xprt_cfg: The transport configuration for the glink core |
| 141 | * assocaited with this edge. |
| 142 | * @intentless: True if this edge runs in intentless mode. |
| 143 | * @irq_disabled: Flag indicating the whether interrupt is enabled |
| 144 | * or disabled. |
| 145 | * @remote_proc_id: The SMEM processor id for the remote side. |
| 146 | * @rx_reset_reg: Reference to the register to reset the rx irq |
| 147 | * line, if applicable. |
| 148 | * @out_irq_reg: Reference to the register to send an irq to the |
| 149 | * remote side. |
| 150 | * @out_irq_mask: Mask written to @out_irq_reg to trigger the |
| 151 | * correct irq. |
| 152 | * @irq_line: The incoming interrupt line. |
| 153 | * @tx_irq_count: Number of interrupts triggered. |
| 154 | * @rx_irq_count: Number of interrupts received. |
| 155 | * @tx_ch_desc: Reference to the channel description structure |
| 156 | * for tx in SMEM for this edge. |
| 157 | * @rx_ch_desc: Reference to the channel description structure |
| 158 | * for rx in SMEM for this edge. |
| 159 | * @tx_fifo: Reference to the transmit fifo in SMEM. |
| 160 | * @rx_fifo: Reference to the receive fifo in SMEM. |
| 161 | * @tx_fifo_size: Total size of @tx_fifo. |
| 162 | * @rx_fifo_size: Total size of @rx_fifo. |
| 163 | * @read_from_fifo: Memcpy for this edge. |
| 164 | * @write_to_fifo: Memcpy for this edge. |
| 165 | * @write_lock: Lock to serialize access to @tx_fifo. |
| 166 | * @tx_blocked_queue: Queue of entities waiting for the remote side to |
| 167 | * signal @tx_fifo has flushed and is now empty. |
| 168 | * @tx_resume_needed: A tx resume signal needs to be sent to the glink |
| 169 | * core once the remote side indicates @tx_fifo has |
| 170 | * flushed. |
| 171 | * @tx_blocked_signal_sent: Flag to indicate the flush signal has already |
| 172 | * been sent, and a response is pending from the |
| 173 | * remote side. Protected by @write_lock. |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 174 | * @debug_mask mask to set debugging level. |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 175 | * @kwork: Work to be executed when an irq is received. |
| 176 | * @kworker: Handle to the entity processing of |
| 177 | deferred commands. |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 178 | * @task: Handle to the task context used to run @kworker. |
| 179 | * @use_ref: Active uses of this transport use this to grab |
| 180 | * a reference. Used for ssr synchronization. |
| 181 | * @in_ssr: Signals if this transport is in ssr. |
| 182 | * @rx_lock: Used to serialize concurrent instances of rx |
| 183 | * processing. |
| 184 | * @deferred_cmds: List of deferred commands that need to be |
| 185 | * processed in process context. |
Karthikeyan Ramasubramanian | 8acd272 | 2016-12-09 10:44:34 -0700 | [diff] [blame] | 186 | * @deferred_cmds_cnt: Number of deferred commands in queue. |
Chris Lew | a9a78ae | 2017-05-11 16:47:37 -0700 | [diff] [blame] | 187 | * @rt_vote_lock: Serialize access to RT rx votes |
| 188 | * @rt_votes: Vote count for RT rx thread priority |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 189 | * @num_pw_states: Size of @ramp_time_us. |
| 190 | * @ramp_time_us: Array of ramp times in microseconds where array |
| 191 | * index position represents a power state. |
| 192 | * @mailbox: Mailbox transport channel description reference. |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 193 | * @log_ctx: Pointer to log context. |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 194 | */ |
| 195 | struct edge_info { |
| 196 | struct glink_transport_if xprt_if; |
| 197 | struct glink_core_transport_cfg xprt_cfg; |
| 198 | bool intentless; |
| 199 | bool irq_disabled; |
| 200 | uint32_t remote_proc_id; |
| 201 | void __iomem *rx_reset_reg; |
| 202 | void __iomem *out_irq_reg; |
| 203 | uint32_t out_irq_mask; |
| 204 | uint32_t irq_line; |
| 205 | uint32_t tx_irq_count; |
| 206 | uint32_t rx_irq_count; |
| 207 | struct channel_desc *tx_ch_desc; |
| 208 | struct channel_desc *rx_ch_desc; |
| 209 | void __iomem *tx_fifo; |
| 210 | void __iomem *rx_fifo; |
| 211 | uint32_t tx_fifo_size; |
| 212 | uint32_t rx_fifo_size; |
| 213 | void * (*read_from_fifo)(void *dest, const void *src, size_t num_bytes); |
| 214 | void * (*write_to_fifo)(void *dest, const void *src, size_t num_bytes); |
| 215 | spinlock_t write_lock; |
| 216 | wait_queue_head_t tx_blocked_queue; |
| 217 | bool tx_resume_needed; |
| 218 | bool tx_blocked_signal_sent; |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 219 | unsigned int debug_mask; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 220 | struct kthread_work kwork; |
| 221 | struct kthread_worker kworker; |
| 222 | struct task_struct *task; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 223 | struct srcu_struct use_ref; |
| 224 | bool in_ssr; |
| 225 | spinlock_t rx_lock; |
| 226 | struct list_head deferred_cmds; |
Karthikeyan Ramasubramanian | 8acd272 | 2016-12-09 10:44:34 -0700 | [diff] [blame] | 227 | uint32_t deferred_cmds_cnt; |
Chris Lew | a9a78ae | 2017-05-11 16:47:37 -0700 | [diff] [blame] | 228 | spinlock_t rt_vote_lock; |
| 229 | uint32_t rt_votes; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 230 | uint32_t num_pw_states; |
Dhoat Harpal | 057e4fb | 2017-09-21 22:12:14 +0530 | [diff] [blame] | 231 | uint32_t readback; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 232 | unsigned long *ramp_time_us; |
| 233 | struct mailbox_config_info *mailbox; |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 234 | void *log_ctx; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 235 | }; |
| 236 | |
| 237 | /** |
| 238 | * struct deferred_cmd - description of a command to be processed later |
| 239 | * @list_node: Used to put this command on a list in the edge. |
| 240 | * @id: ID of the command. |
| 241 | * @param1: Parameter one of the command. |
| 242 | * @param2: Parameter two of the command. |
| 243 | * @data: Extra data associated with the command, if applicable. |
| 244 | * |
| 245 | * This structure stores the relevant information of a command that was removed |
| 246 | * from the fifo but needs to be processed at a later time. |
| 247 | */ |
| 248 | struct deferred_cmd { |
| 249 | struct list_head list_node; |
| 250 | uint16_t id; |
| 251 | uint16_t param1; |
| 252 | uint32_t param2; |
| 253 | void *data; |
| 254 | }; |
| 255 | |
| 256 | static uint32_t negotiate_features_v1(struct glink_transport_if *if_ptr, |
| 257 | const struct glink_core_version *version, |
| 258 | uint32_t features); |
| 259 | static void register_debugfs_info(struct edge_info *einfo); |
| 260 | |
| 261 | static struct edge_info *edge_infos[NUM_SMEM_SUBSYSTEMS]; |
| 262 | static DEFINE_MUTEX(probe_lock); |
| 263 | static struct glink_core_version versions[] = { |
| 264 | {1, TRACER_PKT_FEATURE, negotiate_features_v1}, |
| 265 | }; |
| 266 | |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 267 | #define SMEM_IPC_LOG(einfo, str, id, param1, param2) do { \ |
| 268 | if ((glink_xprt_debug_mask & QCOM_GLINK_DEBUG_ENABLE) \ |
| 269 | && (einfo->debug_mask & QCOM_GLINK_DEBUG_ENABLE)) \ |
| 270 | ipc_log_string(einfo->log_ctx, \ |
| 271 | "%s: Rx:%x:%x Tx:%x:%x Cmd:%x P1:%x P2:%x\n", \ |
| 272 | str, einfo->rx_ch_desc->read_index, \ |
| 273 | einfo->rx_ch_desc->write_index, \ |
| 274 | einfo->tx_ch_desc->read_index, \ |
| 275 | einfo->tx_ch_desc->write_index, \ |
| 276 | id, param1, param2); \ |
| 277 | } while (0) \ |
| 278 | |
| 279 | enum { |
| 280 | QCOM_GLINK_DEBUG_ENABLE = 1U << 0, |
| 281 | QCOM_GLINK_DEBUG_DISABLE = 1U << 1, |
| 282 | }; |
| 283 | |
| 284 | static unsigned int glink_xprt_debug_mask = QCOM_GLINK_DEBUG_ENABLE; |
| 285 | module_param_named(debug_mask, glink_xprt_debug_mask, |
| 286 | uint, 0664); |
| 287 | |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 288 | /** |
| 289 | * send_irq() - send an irq to a remote entity as an event signal |
| 290 | * @einfo: Which remote entity that should receive the irq. |
| 291 | */ |
| 292 | static void send_irq(struct edge_info *einfo) |
| 293 | { |
| 294 | /* |
| 295 | * Any data associated with this event must be visable to the remote |
| 296 | * before the interrupt is triggered |
| 297 | */ |
Dhoat Harpal | 057e4fb | 2017-09-21 22:12:14 +0530 | [diff] [blame] | 298 | einfo->readback = einfo->tx_ch_desc->write_index; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 299 | wmb(); |
| 300 | writel_relaxed(einfo->out_irq_mask, einfo->out_irq_reg); |
Karthikeyan Ramasubramanian | dfc5d4a | 2016-10-14 08:42:30 -0600 | [diff] [blame] | 301 | if (einfo->remote_proc_id != SMEM_SPSS) |
| 302 | writel_relaxed(0, einfo->out_irq_reg); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 303 | einfo->tx_irq_count++; |
| 304 | } |
| 305 | |
| 306 | /** |
| 307 | * read_from_fifo() - memcpy from fifo memory |
| 308 | * @dest: Destination address. |
| 309 | * @src: Source address. |
| 310 | * @num_bytes: Number of bytes to copy. |
| 311 | * |
| 312 | * Return: Destination address. |
| 313 | */ |
| 314 | static void *read_from_fifo(void *dest, const void *src, size_t num_bytes) |
| 315 | { |
| 316 | memcpy_fromio(dest, src, num_bytes); |
| 317 | return dest; |
| 318 | } |
| 319 | |
| 320 | /** |
| 321 | * write_to_fifo() - memcpy to fifo memory |
| 322 | * @dest: Destination address. |
| 323 | * @src: Source address. |
| 324 | * @num_bytes: Number of bytes to copy. |
| 325 | * |
| 326 | * Return: Destination address. |
| 327 | */ |
| 328 | static void *write_to_fifo(void *dest, const void *src, size_t num_bytes) |
| 329 | { |
| 330 | memcpy_toio(dest, src, num_bytes); |
| 331 | return dest; |
| 332 | } |
| 333 | |
| 334 | /** |
| 335 | * memcpy32_toio() - memcpy to word access only memory |
| 336 | * @dest: Destination address. |
| 337 | * @src: Source address. |
| 338 | * @num_bytes: Number of bytes to copy. |
| 339 | * |
| 340 | * Return: Destination address. |
| 341 | */ |
| 342 | static void *memcpy32_toio(void *dest, const void *src, size_t num_bytes) |
| 343 | { |
| 344 | uint32_t *dest_local = (uint32_t *)dest; |
| 345 | uint32_t *src_local = (uint32_t *)src; |
| 346 | |
| 347 | if (WARN_ON(num_bytes & RPM_FIFO_ADDR_ALIGN_BYTES)) |
| 348 | return ERR_PTR(-EINVAL); |
| 349 | if (WARN_ON(!dest_local || |
| 350 | ((uintptr_t)dest_local & RPM_FIFO_ADDR_ALIGN_BYTES))) |
| 351 | return ERR_PTR(-EINVAL); |
| 352 | if (WARN_ON(!src_local || |
| 353 | ((uintptr_t)src_local & RPM_FIFO_ADDR_ALIGN_BYTES))) |
| 354 | return ERR_PTR(-EINVAL); |
| 355 | num_bytes /= sizeof(uint32_t); |
| 356 | |
| 357 | while (num_bytes--) |
| 358 | __raw_writel_no_log(*src_local++, dest_local++); |
| 359 | |
| 360 | return dest; |
| 361 | } |
| 362 | |
| 363 | /** |
| 364 | * memcpy32_fromio() - memcpy from word access only memory |
| 365 | * @dest: Destination address. |
| 366 | * @src: Source address. |
| 367 | * @num_bytes: Number of bytes to copy. |
| 368 | * |
| 369 | * Return: Destination address. |
| 370 | */ |
| 371 | static void *memcpy32_fromio(void *dest, const void *src, size_t num_bytes) |
| 372 | { |
| 373 | uint32_t *dest_local = (uint32_t *)dest; |
| 374 | uint32_t *src_local = (uint32_t *)src; |
| 375 | |
| 376 | if (WARN_ON(num_bytes & RPM_FIFO_ADDR_ALIGN_BYTES)) |
| 377 | return ERR_PTR(-EINVAL); |
| 378 | if (WARN_ON(!dest_local || |
| 379 | ((uintptr_t)dest_local & RPM_FIFO_ADDR_ALIGN_BYTES))) |
| 380 | return ERR_PTR(-EINVAL); |
| 381 | if (WARN_ON(!src_local || |
| 382 | ((uintptr_t)src_local & RPM_FIFO_ADDR_ALIGN_BYTES))) |
| 383 | return ERR_PTR(-EINVAL); |
| 384 | num_bytes /= sizeof(uint32_t); |
| 385 | |
| 386 | while (num_bytes--) |
| 387 | *dest_local++ = __raw_readl_no_log(src_local++); |
| 388 | |
| 389 | return dest; |
| 390 | } |
| 391 | |
| 392 | /** |
| 393 | * fifo_read_avail() - how many bytes are available to be read from an edge |
| 394 | * @einfo: The concerned edge to query. |
| 395 | * |
| 396 | * Return: The number of bytes available to be read from edge. |
| 397 | */ |
| 398 | static uint32_t fifo_read_avail(struct edge_info *einfo) |
| 399 | { |
| 400 | uint32_t read_index = einfo->rx_ch_desc->read_index; |
| 401 | uint32_t write_index = einfo->rx_ch_desc->write_index; |
| 402 | uint32_t fifo_size = einfo->rx_fifo_size; |
| 403 | uint32_t bytes_avail; |
| 404 | |
| 405 | bytes_avail = write_index - read_index; |
| 406 | if (write_index < read_index) |
| 407 | /* |
| 408 | * Case: W < R - Write has wrapped |
| 409 | * -------------------------------- |
| 410 | * In this case, the write operation has wrapped past the end |
| 411 | * of the FIFO which means that now calculating the amount of |
| 412 | * data in the FIFO results in a negative number. This can be |
| 413 | * easily fixed by adding the fifo_size to the value. Even |
| 414 | * though the values are unsigned, subtraction is always done |
| 415 | * using 2's complement which means that the result will still |
| 416 | * be correct once the FIFO size has been added to the negative |
| 417 | * result. |
| 418 | * |
| 419 | * Example: |
| 420 | * '-' = data in fifo |
| 421 | * '.' = empty |
| 422 | * |
| 423 | * 0 1 |
| 424 | * 0123456789012345 |
| 425 | * |-----w.....r----| |
| 426 | * 0 N |
| 427 | * |
| 428 | * write = 5 = 101b |
| 429 | * read = 11 = 1011b |
| 430 | * Data in FIFO |
| 431 | * (write - read) + fifo_size = (101b - 1011b) + 10000b |
| 432 | * = 11111010b + 10000b = 1010b = 10 |
| 433 | */ |
| 434 | bytes_avail += fifo_size; |
| 435 | |
| 436 | return bytes_avail; |
| 437 | } |
| 438 | |
| 439 | /** |
| 440 | * fifo_write_avail() - how many bytes can be written to the edge |
| 441 | * @einfo: The concerned edge to query. |
| 442 | * |
| 443 | * Calculates the number of bytes that can be transmitted at this time. |
| 444 | * Automatically reserves some space to maintain alignment when the fifo is |
| 445 | * completely full, and reserves space so that the flush command can always be |
| 446 | * transmitted when needed. |
| 447 | * |
| 448 | * Return: The number of bytes available to be read from edge. |
| 449 | */ |
| 450 | static uint32_t fifo_write_avail(struct edge_info *einfo) |
| 451 | { |
| 452 | uint32_t read_index = einfo->tx_ch_desc->read_index; |
| 453 | uint32_t write_index = einfo->tx_ch_desc->write_index; |
| 454 | uint32_t fifo_size = einfo->tx_fifo_size; |
| 455 | uint32_t bytes_avail = read_index - write_index; |
| 456 | |
| 457 | if (read_index <= write_index) |
| 458 | bytes_avail += fifo_size; |
| 459 | if (bytes_avail < FIFO_FULL_RESERVE + TX_BLOCKED_CMD_RESERVE) |
| 460 | bytes_avail = 0; |
| 461 | else |
| 462 | bytes_avail -= FIFO_FULL_RESERVE + TX_BLOCKED_CMD_RESERVE; |
| 463 | |
| 464 | return bytes_avail; |
| 465 | } |
| 466 | |
| 467 | /** |
| 468 | * fifo_read() - read data from an edge |
| 469 | * @einfo: The concerned edge to read from. |
| 470 | * @_data: Buffer to copy the read data into. |
| 471 | * @len: The ammount of data to read in bytes. |
| 472 | * |
| 473 | * Return: The number of bytes read. |
| 474 | */ |
| 475 | static int fifo_read(struct edge_info *einfo, void *_data, int len) |
| 476 | { |
| 477 | void *ptr; |
| 478 | void *ret; |
| 479 | void *data = _data; |
| 480 | int orig_len = len; |
| 481 | uint32_t read_index = einfo->rx_ch_desc->read_index; |
| 482 | uint32_t write_index = einfo->rx_ch_desc->write_index; |
| 483 | uint32_t fifo_size = einfo->rx_fifo_size; |
| 484 | uint32_t n; |
| 485 | |
Hardik Arya | d9f068f | 2019-01-04 16:14:20 +0530 | [diff] [blame^] | 486 | if (read_index > fifo_size && write_index > fifo_size) |
| 487 | return 0; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 488 | while (len) { |
| 489 | ptr = einfo->rx_fifo + read_index; |
| 490 | if (read_index <= write_index) |
| 491 | n = write_index - read_index; |
| 492 | else |
| 493 | n = fifo_size - read_index; |
| 494 | |
| 495 | if (n == 0) |
| 496 | break; |
| 497 | if (n > len) |
| 498 | n = len; |
| 499 | |
| 500 | ret = einfo->read_from_fifo(data, ptr, n); |
| 501 | if (IS_ERR(ret)) |
| 502 | return PTR_ERR(ret); |
| 503 | |
| 504 | data += n; |
| 505 | len -= n; |
| 506 | read_index += n; |
| 507 | if (read_index >= fifo_size) |
| 508 | read_index -= fifo_size; |
| 509 | } |
| 510 | einfo->rx_ch_desc->read_index = read_index; |
| 511 | |
| 512 | return orig_len - len; |
| 513 | } |
| 514 | |
| 515 | /** |
| 516 | * fifo_write_body() - Copy transmit data into an edge |
| 517 | * @einfo: The concerned edge to copy into. |
| 518 | * @_data: Buffer of data to copy from. |
| 519 | * @len: Size of data to copy in bytes. |
| 520 | * @write_index: Index into the channel where the data should be copied. |
| 521 | * |
| 522 | * Return: Number of bytes remaining to be copied into the edge. |
| 523 | */ |
| 524 | static int fifo_write_body(struct edge_info *einfo, const void *_data, |
| 525 | int len, uint32_t *write_index) |
| 526 | { |
| 527 | void *ptr; |
| 528 | void *ret; |
| 529 | const void *data = _data; |
| 530 | uint32_t read_index = einfo->tx_ch_desc->read_index; |
| 531 | uint32_t fifo_size = einfo->tx_fifo_size; |
| 532 | uint32_t n; |
| 533 | |
Hardik Arya | d9f068f | 2019-01-04 16:14:20 +0530 | [diff] [blame^] | 534 | if (read_index > fifo_size && *write_index > fifo_size) |
| 535 | return 0; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 536 | while (len) { |
| 537 | ptr = einfo->tx_fifo + *write_index; |
| 538 | if (*write_index < read_index) { |
| 539 | n = read_index - *write_index - FIFO_FULL_RESERVE; |
| 540 | } else { |
| 541 | if (read_index < FIFO_FULL_RESERVE) |
| 542 | n = fifo_size + read_index - *write_index - |
| 543 | FIFO_FULL_RESERVE; |
| 544 | else |
| 545 | n = fifo_size - *write_index; |
| 546 | } |
| 547 | |
| 548 | if (n == 0) |
| 549 | break; |
| 550 | if (n > len) |
| 551 | n = len; |
| 552 | |
| 553 | ret = einfo->write_to_fifo(ptr, data, n); |
| 554 | if (IS_ERR(ret)) |
| 555 | return PTR_ERR(ret); |
| 556 | |
| 557 | data += n; |
| 558 | len -= n; |
| 559 | *write_index += n; |
| 560 | if (*write_index >= fifo_size) |
| 561 | *write_index -= fifo_size; |
| 562 | } |
| 563 | return len; |
| 564 | } |
| 565 | |
| 566 | /** |
| 567 | * fifo_write() - Write data into an edge |
| 568 | * @einfo: The concerned edge to write to. |
| 569 | * @data: Buffer of data to write. |
| 570 | * @len: Length of data to write, in bytes. |
| 571 | * |
| 572 | * Wrapper around fifo_write_body() to manage additional details that are |
| 573 | * necessary for a complete write event. Does not manage concurrency. Clients |
| 574 | * should use fifo_write_avail() to check if there is sufficent space before |
| 575 | * calling fifo_write(). |
| 576 | * |
| 577 | * Return: Number of bytes written to the edge. |
| 578 | */ |
| 579 | static int fifo_write(struct edge_info *einfo, const void *data, int len) |
| 580 | { |
| 581 | int orig_len = len; |
| 582 | uint32_t write_index = einfo->tx_ch_desc->write_index; |
| 583 | |
| 584 | len = fifo_write_body(einfo, data, len, &write_index); |
| 585 | if (unlikely(len < 0)) |
| 586 | return len; |
Chris Lew | cd2e54c | 2017-12-05 15:23:58 -0800 | [diff] [blame] | 587 | |
| 588 | /* All data writes need to be flushed to memory before the write index |
| 589 | * is updated. This protects against a race condition where the remote |
| 590 | * reads stale data because the write index was written before the data. |
| 591 | */ |
| 592 | wmb(); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 593 | einfo->tx_ch_desc->write_index = write_index; |
| 594 | send_irq(einfo); |
| 595 | |
| 596 | return orig_len - len; |
| 597 | } |
| 598 | |
| 599 | /** |
| 600 | * fifo_write_complex() - writes a transaction of multiple buffers to an edge |
| 601 | * @einfo: The concerned edge to write to. |
| 602 | * @data1: The first buffer of data to write. |
| 603 | * @len1: The length of the first buffer in bytes. |
| 604 | * @data2: The second buffer of data to write. |
| 605 | * @len2: The length of the second buffer in bytes. |
| 606 | * @data3: The thirs buffer of data to write. |
| 607 | * @len3: The length of the third buffer in bytes. |
| 608 | * |
| 609 | * A variant of fifo_write() which optimizes the usecase found in tx(). The |
| 610 | * remote side expects all or none of the transmitted data to be available. |
| 611 | * This prevents the tx() usecase from calling fifo_write() multiple times. The |
| 612 | * alternative would be an allocation and additional memcpy to create a buffer |
| 613 | * to copy all the data segments into one location before calling fifo_write(). |
| 614 | * |
| 615 | * Return: Number of bytes written to the edge. |
| 616 | */ |
| 617 | static int fifo_write_complex(struct edge_info *einfo, |
| 618 | const void *data1, int len1, |
| 619 | const void *data2, int len2, |
| 620 | const void *data3, int len3) |
| 621 | { |
| 622 | int orig_len = len1 + len2 + len3; |
| 623 | uint32_t write_index = einfo->tx_ch_desc->write_index; |
| 624 | |
| 625 | len1 = fifo_write_body(einfo, data1, len1, &write_index); |
| 626 | if (unlikely(len1 < 0)) |
| 627 | return len1; |
| 628 | len2 = fifo_write_body(einfo, data2, len2, &write_index); |
| 629 | if (unlikely(len2 < 0)) |
| 630 | return len2; |
| 631 | len3 = fifo_write_body(einfo, data3, len3, &write_index); |
| 632 | if (unlikely(len3 < 0)) |
| 633 | return len3; |
| 634 | |
Chris Lew | cd2e54c | 2017-12-05 15:23:58 -0800 | [diff] [blame] | 635 | /* All data writes need to be flushed to memory before the write index |
| 636 | * is updated. This protects against a race condition where the remote |
| 637 | * reads stale data because the write index was written before the data. |
| 638 | */ |
| 639 | wmb(); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 640 | einfo->tx_ch_desc->write_index = write_index; |
| 641 | send_irq(einfo); |
| 642 | |
| 643 | return orig_len - len1 - len2 - len3; |
| 644 | } |
| 645 | |
| 646 | /** |
| 647 | * send_tx_blocked_signal() - send the flush command as we are blocked from tx |
| 648 | * @einfo: The concerned edge which is blocked. |
| 649 | * |
| 650 | * Used to send a signal to the remote side that we have no more space to |
| 651 | * transmit data and therefore need the remote side to signal us when they have |
| 652 | * cleared some space by reading some data. This function relies upon the |
| 653 | * assumption that fifo_write_avail() will reserve some space so that the flush |
| 654 | * signal command can always be put into the transmit fifo, even when "everyone" |
| 655 | * else thinks that the transmit fifo is truely full. This function assumes |
| 656 | * that it is called with the write_lock already locked. |
| 657 | */ |
| 658 | static void send_tx_blocked_signal(struct edge_info *einfo) |
| 659 | { |
| 660 | struct read_notif_request { |
| 661 | uint16_t cmd; |
| 662 | uint16_t reserved; |
| 663 | uint32_t reserved2; |
| 664 | }; |
| 665 | struct read_notif_request read_notif_req; |
| 666 | |
| 667 | read_notif_req.cmd = READ_NOTIF_CMD; |
| 668 | read_notif_req.reserved = 0; |
| 669 | read_notif_req.reserved2 = 0; |
| 670 | |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 671 | SMEM_IPC_LOG(einfo, __func__, READ_NOTIF_CMD, 0, 0); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 672 | if (!einfo->tx_blocked_signal_sent) { |
| 673 | einfo->tx_blocked_signal_sent = true; |
| 674 | fifo_write(einfo, &read_notif_req, sizeof(read_notif_req)); |
| 675 | } |
| 676 | } |
| 677 | |
| 678 | /** |
| 679 | * fifo_tx() - transmit data on an edge |
| 680 | * @einfo: The concerned edge to transmit on. |
| 681 | * @data: Buffer of data to transmit. |
| 682 | * @len: Length of data to transmit in bytes. |
| 683 | * |
| 684 | * This helper function is the preferred interface to fifo_write() and should |
| 685 | * be used in the normal case for transmitting entities. fifo_tx() will block |
| 686 | * until there is sufficent room to transmit the requested ammount of data. |
| 687 | * fifo_tx() will manage any concurrency between multiple transmitters on a |
| 688 | * channel. |
| 689 | * |
| 690 | * Return: Number of bytes transmitted. |
| 691 | */ |
| 692 | static int fifo_tx(struct edge_info *einfo, const void *data, int len) |
| 693 | { |
| 694 | unsigned long flags; |
| 695 | int ret; |
| 696 | |
| 697 | DEFINE_WAIT(wait); |
| 698 | |
| 699 | spin_lock_irqsave(&einfo->write_lock, flags); |
| 700 | while (fifo_write_avail(einfo) < len) { |
| 701 | send_tx_blocked_signal(einfo); |
| 702 | prepare_to_wait(&einfo->tx_blocked_queue, &wait, |
| 703 | TASK_UNINTERRUPTIBLE); |
| 704 | if (fifo_write_avail(einfo) < len && !einfo->in_ssr) { |
| 705 | spin_unlock_irqrestore(&einfo->write_lock, flags); |
| 706 | schedule(); |
| 707 | spin_lock_irqsave(&einfo->write_lock, flags); |
| 708 | } |
| 709 | finish_wait(&einfo->tx_blocked_queue, &wait); |
| 710 | if (einfo->in_ssr) { |
| 711 | spin_unlock_irqrestore(&einfo->write_lock, flags); |
| 712 | return -EFAULT; |
| 713 | } |
| 714 | } |
| 715 | ret = fifo_write(einfo, data, len); |
| 716 | spin_unlock_irqrestore(&einfo->write_lock, flags); |
| 717 | |
| 718 | return ret; |
| 719 | } |
| 720 | |
| 721 | /** |
| 722 | * process_rx_data() - process received data from an edge |
| 723 | * @einfo: The edge the data was received on. |
| 724 | * @cmd_id: ID to specify the type of data. |
| 725 | * @rcid: The remote channel id associated with the data. |
| 726 | * @intend_id: The intent the data should be put in. |
| 727 | */ |
| 728 | static void process_rx_data(struct edge_info *einfo, uint16_t cmd_id, |
| 729 | uint32_t rcid, uint32_t intent_id) |
| 730 | { |
| 731 | struct command { |
| 732 | uint32_t frag_size; |
| 733 | uint32_t size_remaining; |
| 734 | }; |
| 735 | struct command cmd; |
| 736 | struct glink_core_rx_intent *intent; |
| 737 | char trash[FIFO_ALIGNMENT]; |
| 738 | int alignment; |
| 739 | bool err = false; |
| 740 | |
| 741 | fifo_read(einfo, &cmd, sizeof(cmd)); |
| 742 | |
| 743 | intent = einfo->xprt_if.glink_core_if_ptr->rx_get_pkt_ctx( |
| 744 | &einfo->xprt_if, rcid, intent_id); |
| 745 | if (intent == NULL) { |
| 746 | GLINK_ERR("%s: no intent for ch %d liid %d\n", __func__, rcid, |
| 747 | intent_id); |
| 748 | err = true; |
| 749 | } else if (intent->data == NULL) { |
| 750 | if (einfo->intentless) { |
Chris Lew | 7cff2be | 2017-04-12 15:11:08 -0700 | [diff] [blame] | 751 | intent->data = kmalloc(cmd.frag_size, |
| 752 | __GFP_ATOMIC | __GFP_HIGH); |
Chris Lew | a3c44d2 | 2017-01-17 14:50:24 -0800 | [diff] [blame] | 753 | if (!intent->data) { |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 754 | err = true; |
Chris Lew | a3c44d2 | 2017-01-17 14:50:24 -0800 | [diff] [blame] | 755 | GLINK_ERR( |
| 756 | "%s: atomic alloc fail ch %d liid %d size %d\n", |
| 757 | __func__, rcid, intent_id, |
| 758 | cmd.frag_size); |
| 759 | } else { |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 760 | intent->intent_size = cmd.frag_size; |
Chris Lew | a3c44d2 | 2017-01-17 14:50:24 -0800 | [diff] [blame] | 761 | } |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 762 | } else { |
| 763 | GLINK_ERR( |
| 764 | "%s: intent for ch %d liid %d has no data buff\n", |
| 765 | __func__, rcid, intent_id); |
| 766 | err = true; |
| 767 | } |
| 768 | } |
| 769 | |
| 770 | if (!err && |
| 771 | (intent->intent_size - intent->write_offset < cmd.frag_size || |
| 772 | intent->write_offset + cmd.size_remaining > intent->intent_size)) { |
| 773 | GLINK_ERR("%s: rx data size:%d and remaining:%d %s %d %s:%d\n", |
| 774 | __func__, |
| 775 | cmd.frag_size, |
| 776 | cmd.size_remaining, |
| 777 | "will overflow ch", |
| 778 | rcid, |
| 779 | "intent", |
| 780 | intent_id); |
| 781 | err = true; |
| 782 | } |
| 783 | |
| 784 | if (err) { |
| 785 | alignment = ALIGN(cmd.frag_size, FIFO_ALIGNMENT); |
| 786 | alignment -= cmd.frag_size; |
| 787 | while (cmd.frag_size) { |
| 788 | if (cmd.frag_size > FIFO_ALIGNMENT) { |
| 789 | fifo_read(einfo, trash, FIFO_ALIGNMENT); |
| 790 | cmd.frag_size -= FIFO_ALIGNMENT; |
| 791 | } else { |
| 792 | fifo_read(einfo, trash, cmd.frag_size); |
| 793 | cmd.frag_size = 0; |
| 794 | } |
| 795 | } |
| 796 | if (alignment) |
| 797 | fifo_read(einfo, trash, alignment); |
| 798 | return; |
| 799 | } |
| 800 | fifo_read(einfo, intent->data + intent->write_offset, cmd.frag_size); |
| 801 | intent->write_offset += cmd.frag_size; |
| 802 | intent->pkt_size += cmd.frag_size; |
| 803 | |
| 804 | alignment = ALIGN(cmd.frag_size, FIFO_ALIGNMENT); |
| 805 | alignment -= cmd.frag_size; |
| 806 | if (alignment) |
| 807 | fifo_read(einfo, trash, alignment); |
| 808 | |
| 809 | if (unlikely((cmd_id == TRACER_PKT_CMD || |
| 810 | cmd_id == TRACER_PKT_CONT_CMD) && !cmd.size_remaining)) { |
| 811 | tracer_pkt_log_event(intent->data, GLINK_XPRT_RX); |
| 812 | intent->tracer_pkt = true; |
| 813 | } |
| 814 | |
| 815 | einfo->xprt_if.glink_core_if_ptr->rx_put_pkt_ctx(&einfo->xprt_if, |
| 816 | rcid, |
| 817 | intent, |
| 818 | cmd.size_remaining ? |
| 819 | false : true); |
| 820 | } |
| 821 | |
| 822 | /** |
| 823 | * queue_cmd() - queue a deferred command for later processing |
| 824 | * @einfo: Edge to queue commands on. |
| 825 | * @cmd: Command to queue. |
| 826 | * @data: Command specific data to queue with the command. |
| 827 | * |
| 828 | * Return: True if queuing was successful, false otherwise. |
| 829 | */ |
| 830 | static bool queue_cmd(struct edge_info *einfo, void *cmd, void *data) |
| 831 | { |
| 832 | struct command { |
| 833 | uint16_t id; |
| 834 | uint16_t param1; |
| 835 | uint32_t param2; |
| 836 | }; |
| 837 | struct command *_cmd = cmd; |
| 838 | struct deferred_cmd *d_cmd; |
| 839 | |
| 840 | d_cmd = kmalloc(sizeof(*d_cmd), GFP_ATOMIC); |
| 841 | if (!d_cmd) { |
| 842 | GLINK_ERR("%s: Discarding cmd %d\n", __func__, _cmd->id); |
| 843 | return false; |
| 844 | } |
| 845 | d_cmd->id = _cmd->id; |
| 846 | d_cmd->param1 = _cmd->param1; |
| 847 | d_cmd->param2 = _cmd->param2; |
| 848 | d_cmd->data = data; |
| 849 | list_add_tail(&d_cmd->list_node, &einfo->deferred_cmds); |
Karthikeyan Ramasubramanian | 8acd272 | 2016-12-09 10:44:34 -0700 | [diff] [blame] | 850 | einfo->deferred_cmds_cnt++; |
Kyle Yan | 65be4a5 | 2016-10-31 15:05:00 -0700 | [diff] [blame] | 851 | kthread_queue_work(&einfo->kworker, &einfo->kwork); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 852 | return true; |
| 853 | } |
| 854 | |
| 855 | /** |
| 856 | * get_rx_fifo() - Find the rx fifo for an edge |
| 857 | * @einfo: Edge to find the fifo for. |
| 858 | * |
| 859 | * Return: True if fifo was found, false otherwise. |
| 860 | */ |
| 861 | static bool get_rx_fifo(struct edge_info *einfo) |
| 862 | { |
| 863 | if (einfo->mailbox) { |
| 864 | einfo->rx_fifo = &einfo->mailbox->fifo[einfo->mailbox->tx_size]; |
| 865 | einfo->rx_fifo_size = einfo->mailbox->rx_size; |
| 866 | } else { |
| 867 | einfo->rx_fifo = smem_get_entry(SMEM_GLINK_NATIVE_XPRT_FIFO_1, |
| 868 | &einfo->rx_fifo_size, |
| 869 | einfo->remote_proc_id, |
| 870 | SMEM_ITEM_CACHED_FLAG); |
| 871 | if (!einfo->rx_fifo) |
Dhoat Harpal | 55342ec | 2017-04-03 17:04:11 +0530 | [diff] [blame] | 872 | einfo->rx_fifo = smem_get_entry( |
| 873 | SMEM_GLINK_NATIVE_XPRT_FIFO_1, |
| 874 | &einfo->rx_fifo_size, |
| 875 | einfo->remote_proc_id, |
| 876 | 0); |
| 877 | if (!einfo->rx_fifo) |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 878 | return false; |
| 879 | } |
| 880 | |
| 881 | return true; |
| 882 | } |
| 883 | |
| 884 | /** |
Chris Lew | 398933d | 2017-05-11 16:54:10 -0700 | [diff] [blame] | 885 | * tx_wakeup_worker() - worker function to wakeup tx blocked thread |
| 886 | * @work: kwork associated with the edge to process commands on. |
| 887 | */ |
| 888 | static void tx_wakeup_worker(struct edge_info *einfo) |
| 889 | { |
| 890 | struct glink_transport_if xprt_if = einfo->xprt_if; |
| 891 | bool trigger_wakeup = false; |
Arun Kumar Neelakantam | 68156b4 | 2018-02-08 16:26:16 +0530 | [diff] [blame] | 892 | bool trigger_resume = false; |
Chris Lew | 398933d | 2017-05-11 16:54:10 -0700 | [diff] [blame] | 893 | unsigned long flags; |
| 894 | |
| 895 | if (einfo->in_ssr) |
| 896 | return; |
Arun Kumar Neelakantam | 68156b4 | 2018-02-08 16:26:16 +0530 | [diff] [blame] | 897 | |
Chris Lew | 398933d | 2017-05-11 16:54:10 -0700 | [diff] [blame] | 898 | spin_lock_irqsave(&einfo->write_lock, flags); |
Arun Kumar Neelakantam | 68156b4 | 2018-02-08 16:26:16 +0530 | [diff] [blame] | 899 | if (fifo_write_avail(einfo)) { |
| 900 | if (einfo->tx_blocked_signal_sent) |
| 901 | einfo->tx_blocked_signal_sent = false; |
| 902 | if (einfo->tx_resume_needed) { |
| 903 | einfo->tx_resume_needed = false; |
| 904 | trigger_resume = true; |
| 905 | } |
| 906 | } |
Chris Lew | 398933d | 2017-05-11 16:54:10 -0700 | [diff] [blame] | 907 | if (waitqueue_active(&einfo->tx_blocked_queue)) { /* tx waiting ?*/ |
Chris Lew | 398933d | 2017-05-11 16:54:10 -0700 | [diff] [blame] | 908 | trigger_wakeup = true; |
| 909 | } |
| 910 | spin_unlock_irqrestore(&einfo->write_lock, flags); |
| 911 | if (trigger_wakeup) |
| 912 | wake_up_all(&einfo->tx_blocked_queue); |
Arun Kumar Neelakantam | 68156b4 | 2018-02-08 16:26:16 +0530 | [diff] [blame] | 913 | if (trigger_resume) |
| 914 | xprt_if.glink_core_if_ptr->tx_resume(&xprt_if); |
Chris Lew | 398933d | 2017-05-11 16:54:10 -0700 | [diff] [blame] | 915 | } |
| 916 | |
| 917 | /** |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 918 | * __rx_worker() - process received commands on a specific edge |
| 919 | * @einfo: Edge to process commands on. |
| 920 | * @atomic_ctx: Indicates if the caller is in atomic context and requires any |
| 921 | * non-atomic operations to be deferred. |
| 922 | */ |
| 923 | static void __rx_worker(struct edge_info *einfo, bool atomic_ctx) |
| 924 | { |
| 925 | struct command { |
| 926 | uint16_t id; |
| 927 | uint16_t param1; |
| 928 | uint32_t param2; |
| 929 | }; |
| 930 | struct intent_desc { |
| 931 | uint32_t size; |
| 932 | uint32_t id; |
| 933 | }; |
| 934 | struct command cmd; |
| 935 | struct intent_desc intent; |
| 936 | struct intent_desc *intents; |
| 937 | int i; |
| 938 | bool granted; |
| 939 | unsigned long flags; |
| 940 | int rcu_id; |
| 941 | uint16_t rcid; |
| 942 | uint32_t name_len; |
| 943 | uint32_t len; |
| 944 | char *name; |
| 945 | char trash[FIFO_ALIGNMENT]; |
| 946 | struct deferred_cmd *d_cmd; |
| 947 | void *cmd_data; |
| 948 | |
| 949 | rcu_id = srcu_read_lock(&einfo->use_ref); |
| 950 | |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 951 | if (einfo->in_ssr) { |
| 952 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 953 | return; |
| 954 | } |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 955 | |
Dhoat Harpal | b22ef4e | 2018-05-24 14:09:06 +0530 | [diff] [blame] | 956 | if (!einfo->rx_fifo) { |
| 957 | if (!get_rx_fifo(einfo)) |
| 958 | return; |
| 959 | einfo->xprt_if.glink_core_if_ptr->link_up(&einfo->xprt_if); |
| 960 | } |
| 961 | |
Dhoat Harpal | e9d7337 | 2017-03-10 21:23:03 +0530 | [diff] [blame] | 962 | if ((atomic_ctx) && ((einfo->tx_resume_needed) || |
| 963 | (waitqueue_active(&einfo->tx_blocked_queue)))) /* tx waiting ?*/ |
Chris Lew | 398933d | 2017-05-11 16:54:10 -0700 | [diff] [blame] | 964 | tx_wakeup_worker(einfo); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 965 | |
| 966 | /* |
| 967 | * Access to the fifo needs to be synchronized, however only the calls |
| 968 | * into the core from process_rx_data() are compatible with an atomic |
| 969 | * processing context. For everything else, we need to do all the fifo |
| 970 | * processing, then unlock the lock for the call into the core. Data |
| 971 | * in the fifo is allowed to be processed immediately instead of being |
| 972 | * ordered with the commands because the channel open process prevents |
| 973 | * intents from being queued (which prevents data from being sent) until |
| 974 | * all the channel open commands are processed by the core, thus |
| 975 | * eliminating a race. |
| 976 | */ |
| 977 | spin_lock_irqsave(&einfo->rx_lock, flags); |
| 978 | while (fifo_read_avail(einfo) || |
| 979 | (!atomic_ctx && !list_empty(&einfo->deferred_cmds))) { |
| 980 | if (einfo->in_ssr) |
| 981 | break; |
| 982 | |
Karthikeyan Ramasubramanian | 8acd272 | 2016-12-09 10:44:34 -0700 | [diff] [blame] | 983 | if (atomic_ctx && !einfo->intentless && |
| 984 | einfo->deferred_cmds_cnt >= DEFERRED_CMDS_THRESHOLD) |
| 985 | break; |
| 986 | |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 987 | if (!atomic_ctx && !list_empty(&einfo->deferred_cmds)) { |
| 988 | d_cmd = list_first_entry(&einfo->deferred_cmds, |
| 989 | struct deferred_cmd, list_node); |
| 990 | list_del(&d_cmd->list_node); |
Karthikeyan Ramasubramanian | 8acd272 | 2016-12-09 10:44:34 -0700 | [diff] [blame] | 991 | einfo->deferred_cmds_cnt--; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 992 | cmd.id = d_cmd->id; |
| 993 | cmd.param1 = d_cmd->param1; |
| 994 | cmd.param2 = d_cmd->param2; |
| 995 | cmd_data = d_cmd->data; |
| 996 | kfree(d_cmd); |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 997 | SMEM_IPC_LOG(einfo, "kthread", cmd.id, cmd.param1, |
| 998 | cmd.param2); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 999 | } else { |
| 1000 | fifo_read(einfo, &cmd, sizeof(cmd)); |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 1001 | SMEM_IPC_LOG(einfo, "IRQ", cmd.id, cmd.param1, |
| 1002 | cmd.param2); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 1003 | cmd_data = NULL; |
| 1004 | } |
| 1005 | |
| 1006 | switch (cmd.id) { |
| 1007 | case VERSION_CMD: |
| 1008 | if (atomic_ctx) { |
| 1009 | queue_cmd(einfo, &cmd, NULL); |
| 1010 | break; |
| 1011 | } |
| 1012 | spin_unlock_irqrestore(&einfo->rx_lock, flags); |
| 1013 | einfo->xprt_if.glink_core_if_ptr->rx_cmd_version( |
| 1014 | &einfo->xprt_if, |
| 1015 | cmd.param1, |
| 1016 | cmd.param2); |
| 1017 | spin_lock_irqsave(&einfo->rx_lock, flags); |
| 1018 | break; |
| 1019 | case VERSION_ACK_CMD: |
| 1020 | if (atomic_ctx) { |
| 1021 | queue_cmd(einfo, &cmd, NULL); |
| 1022 | break; |
| 1023 | } |
| 1024 | spin_unlock_irqrestore(&einfo->rx_lock, flags); |
| 1025 | einfo->xprt_if.glink_core_if_ptr->rx_cmd_version_ack( |
| 1026 | &einfo->xprt_if, |
| 1027 | cmd.param1, |
| 1028 | cmd.param2); |
| 1029 | spin_lock_irqsave(&einfo->rx_lock, flags); |
| 1030 | break; |
| 1031 | case OPEN_CMD: |
| 1032 | rcid = cmd.param1; |
| 1033 | name_len = cmd.param2; |
| 1034 | |
| 1035 | if (cmd_data) { |
| 1036 | name = cmd_data; |
| 1037 | } else { |
| 1038 | len = ALIGN(name_len, FIFO_ALIGNMENT); |
| 1039 | name = kmalloc(len, GFP_ATOMIC); |
| 1040 | if (!name) { |
| 1041 | pr_err("No memory available to rx ch open cmd name. Discarding cmd.\n"); |
| 1042 | while (len) { |
| 1043 | fifo_read(einfo, trash, |
| 1044 | FIFO_ALIGNMENT); |
| 1045 | len -= FIFO_ALIGNMENT; |
| 1046 | } |
| 1047 | break; |
| 1048 | } |
| 1049 | fifo_read(einfo, name, len); |
| 1050 | } |
| 1051 | if (atomic_ctx) { |
| 1052 | if (!queue_cmd(einfo, &cmd, name)) |
| 1053 | kfree(name); |
| 1054 | break; |
| 1055 | } |
| 1056 | |
| 1057 | spin_unlock_irqrestore(&einfo->rx_lock, flags); |
| 1058 | einfo->xprt_if.glink_core_if_ptr->rx_cmd_ch_remote_open( |
| 1059 | &einfo->xprt_if, |
| 1060 | rcid, |
| 1061 | name, |
| 1062 | SMEM_XPRT_ID); |
| 1063 | kfree(name); |
| 1064 | spin_lock_irqsave(&einfo->rx_lock, flags); |
| 1065 | break; |
| 1066 | case CLOSE_CMD: |
| 1067 | if (atomic_ctx) { |
| 1068 | queue_cmd(einfo, &cmd, NULL); |
| 1069 | break; |
| 1070 | } |
| 1071 | spin_unlock_irqrestore(&einfo->rx_lock, flags); |
| 1072 | einfo->xprt_if.glink_core_if_ptr-> |
| 1073 | rx_cmd_ch_remote_close( |
| 1074 | &einfo->xprt_if, |
| 1075 | cmd.param1); |
| 1076 | spin_lock_irqsave(&einfo->rx_lock, flags); |
| 1077 | break; |
| 1078 | case OPEN_ACK_CMD: |
| 1079 | if (atomic_ctx) { |
| 1080 | queue_cmd(einfo, &cmd, NULL); |
| 1081 | break; |
| 1082 | } |
| 1083 | spin_unlock_irqrestore(&einfo->rx_lock, flags); |
| 1084 | einfo->xprt_if.glink_core_if_ptr->rx_cmd_ch_open_ack( |
| 1085 | &einfo->xprt_if, |
| 1086 | cmd.param1, |
| 1087 | SMEM_XPRT_ID); |
| 1088 | spin_lock_irqsave(&einfo->rx_lock, flags); |
| 1089 | break; |
| 1090 | case RX_INTENT_CMD: |
| 1091 | /* |
| 1092 | * One intent listed with this command. This is the |
| 1093 | * expected case and can be optimized over the general |
| 1094 | * case of an array of intents. |
| 1095 | */ |
| 1096 | if (cmd.param2 == 1) { |
| 1097 | if (cmd_data) { |
| 1098 | intent.id = ((struct intent_desc *) |
| 1099 | cmd_data)->id; |
| 1100 | intent.size = ((struct intent_desc *) |
| 1101 | cmd_data)->size; |
| 1102 | kfree(cmd_data); |
| 1103 | } else { |
| 1104 | fifo_read(einfo, &intent, |
| 1105 | sizeof(intent)); |
| 1106 | } |
| 1107 | if (atomic_ctx) { |
| 1108 | cmd_data = kmalloc(sizeof(intent), |
| 1109 | GFP_ATOMIC); |
| 1110 | if (!cmd_data) { |
| 1111 | GLINK_ERR( |
| 1112 | "%s: dropping cmd %d\n", |
| 1113 | __func__, cmd.id); |
| 1114 | break; |
| 1115 | } |
| 1116 | ((struct intent_desc *)cmd_data)->id = |
| 1117 | intent.id; |
| 1118 | ((struct intent_desc *)cmd_data)->size = |
| 1119 | intent.size; |
| 1120 | if (!queue_cmd(einfo, &cmd, cmd_data)) |
| 1121 | kfree(cmd_data); |
| 1122 | break; |
| 1123 | } |
| 1124 | spin_unlock_irqrestore(&einfo->rx_lock, flags); |
| 1125 | einfo->xprt_if.glink_core_if_ptr-> |
| 1126 | rx_cmd_remote_rx_intent_put( |
| 1127 | &einfo->xprt_if, |
| 1128 | cmd.param1, |
| 1129 | intent.id, |
| 1130 | intent.size); |
| 1131 | spin_lock_irqsave(&einfo->rx_lock, flags); |
| 1132 | break; |
| 1133 | } |
| 1134 | |
| 1135 | /* Array of intents to process */ |
| 1136 | if (cmd_data) { |
| 1137 | intents = cmd_data; |
| 1138 | } else { |
| 1139 | intents = kmalloc_array(cmd.param2, |
| 1140 | sizeof(*intents), GFP_ATOMIC); |
| 1141 | if (!intents) { |
| 1142 | for (i = 0; i < cmd.param2; ++i) |
| 1143 | fifo_read(einfo, &intent, |
| 1144 | sizeof(intent)); |
| 1145 | break; |
| 1146 | } |
| 1147 | fifo_read(einfo, intents, |
| 1148 | sizeof(*intents) * cmd.param2); |
| 1149 | } |
| 1150 | if (atomic_ctx) { |
| 1151 | if (!queue_cmd(einfo, &cmd, intents)) |
| 1152 | kfree(intents); |
| 1153 | break; |
| 1154 | } |
| 1155 | spin_unlock_irqrestore(&einfo->rx_lock, flags); |
| 1156 | for (i = 0; i < cmd.param2; ++i) { |
| 1157 | einfo->xprt_if.glink_core_if_ptr-> |
| 1158 | rx_cmd_remote_rx_intent_put( |
| 1159 | &einfo->xprt_if, |
| 1160 | cmd.param1, |
| 1161 | intents[i].id, |
| 1162 | intents[i].size); |
| 1163 | } |
| 1164 | kfree(intents); |
| 1165 | spin_lock_irqsave(&einfo->rx_lock, flags); |
| 1166 | break; |
| 1167 | case RX_DONE_CMD: |
| 1168 | if (atomic_ctx) { |
| 1169 | queue_cmd(einfo, &cmd, NULL); |
| 1170 | break; |
| 1171 | } |
| 1172 | spin_unlock_irqrestore(&einfo->rx_lock, flags); |
| 1173 | einfo->xprt_if.glink_core_if_ptr->rx_cmd_tx_done( |
| 1174 | &einfo->xprt_if, |
| 1175 | cmd.param1, |
| 1176 | cmd.param2, |
| 1177 | false); |
| 1178 | spin_lock_irqsave(&einfo->rx_lock, flags); |
| 1179 | break; |
| 1180 | case RX_INTENT_REQ_CMD: |
| 1181 | if (atomic_ctx) { |
| 1182 | queue_cmd(einfo, &cmd, NULL); |
| 1183 | break; |
| 1184 | } |
| 1185 | spin_unlock_irqrestore(&einfo->rx_lock, flags); |
| 1186 | einfo->xprt_if.glink_core_if_ptr-> |
| 1187 | rx_cmd_remote_rx_intent_req( |
| 1188 | &einfo->xprt_if, |
| 1189 | cmd.param1, |
| 1190 | cmd.param2); |
| 1191 | spin_lock_irqsave(&einfo->rx_lock, flags); |
| 1192 | break; |
| 1193 | case RX_INTENT_REQ_ACK_CMD: |
| 1194 | if (atomic_ctx) { |
| 1195 | queue_cmd(einfo, &cmd, NULL); |
| 1196 | break; |
| 1197 | } |
| 1198 | spin_unlock_irqrestore(&einfo->rx_lock, flags); |
| 1199 | granted = false; |
| 1200 | if (cmd.param2 == 1) |
| 1201 | granted = true; |
| 1202 | einfo->xprt_if.glink_core_if_ptr-> |
| 1203 | rx_cmd_rx_intent_req_ack( |
| 1204 | &einfo->xprt_if, |
| 1205 | cmd.param1, |
| 1206 | granted); |
| 1207 | spin_lock_irqsave(&einfo->rx_lock, flags); |
| 1208 | break; |
| 1209 | case TX_DATA_CMD: |
| 1210 | case TX_DATA_CONT_CMD: |
| 1211 | case TRACER_PKT_CMD: |
| 1212 | case TRACER_PKT_CONT_CMD: |
| 1213 | process_rx_data(einfo, cmd.id, cmd.param1, cmd.param2); |
| 1214 | break; |
| 1215 | case CLOSE_ACK_CMD: |
| 1216 | if (atomic_ctx) { |
| 1217 | queue_cmd(einfo, &cmd, NULL); |
| 1218 | break; |
| 1219 | } |
| 1220 | spin_unlock_irqrestore(&einfo->rx_lock, flags); |
| 1221 | einfo->xprt_if.glink_core_if_ptr->rx_cmd_ch_close_ack( |
| 1222 | &einfo->xprt_if, |
| 1223 | cmd.param1); |
| 1224 | spin_lock_irqsave(&einfo->rx_lock, flags); |
| 1225 | break; |
| 1226 | case READ_NOTIF_CMD: |
| 1227 | send_irq(einfo); |
| 1228 | break; |
| 1229 | case SIGNALS_CMD: |
| 1230 | if (atomic_ctx) { |
| 1231 | queue_cmd(einfo, &cmd, NULL); |
| 1232 | break; |
| 1233 | } |
| 1234 | spin_unlock_irqrestore(&einfo->rx_lock, flags); |
| 1235 | einfo->xprt_if.glink_core_if_ptr->rx_cmd_remote_sigs( |
| 1236 | &einfo->xprt_if, |
| 1237 | cmd.param1, |
| 1238 | cmd.param2); |
| 1239 | spin_lock_irqsave(&einfo->rx_lock, flags); |
| 1240 | break; |
| 1241 | case RX_DONE_W_REUSE_CMD: |
| 1242 | if (atomic_ctx) { |
| 1243 | queue_cmd(einfo, &cmd, NULL); |
| 1244 | break; |
| 1245 | } |
| 1246 | spin_unlock_irqrestore(&einfo->rx_lock, flags); |
| 1247 | einfo->xprt_if.glink_core_if_ptr->rx_cmd_tx_done( |
| 1248 | &einfo->xprt_if, |
| 1249 | cmd.param1, |
| 1250 | cmd.param2, |
| 1251 | true); |
| 1252 | spin_lock_irqsave(&einfo->rx_lock, flags); |
| 1253 | break; |
| 1254 | default: |
| 1255 | pr_err("Unrecognized command: %d\n", cmd.id); |
| 1256 | break; |
| 1257 | } |
| 1258 | } |
| 1259 | spin_unlock_irqrestore(&einfo->rx_lock, flags); |
| 1260 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1261 | } |
| 1262 | |
| 1263 | /** |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 1264 | * rx_worker() - worker function to process received commands |
| 1265 | * @work: kwork associated with the edge to process commands on. |
| 1266 | */ |
| 1267 | static void rx_worker(struct kthread_work *work) |
| 1268 | { |
| 1269 | struct edge_info *einfo; |
| 1270 | |
| 1271 | einfo = container_of(work, struct edge_info, kwork); |
| 1272 | __rx_worker(einfo, false); |
| 1273 | } |
| 1274 | |
| 1275 | irqreturn_t irq_handler(int irq, void *priv) |
| 1276 | { |
| 1277 | struct edge_info *einfo = (struct edge_info *)priv; |
| 1278 | |
| 1279 | if (einfo->rx_reset_reg) |
| 1280 | writel_relaxed(einfo->out_irq_mask, einfo->rx_reset_reg); |
| 1281 | |
Dhoat Harpal | a270f9a | 2018-04-13 19:06:42 +0530 | [diff] [blame] | 1282 | __rx_worker(einfo, true); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 1283 | einfo->rx_irq_count++; |
| 1284 | |
| 1285 | return IRQ_HANDLED; |
| 1286 | } |
| 1287 | |
| 1288 | /** |
| 1289 | * tx_cmd_version() - convert a version cmd to wire format and transmit |
| 1290 | * @if_ptr: The transport to transmit on. |
| 1291 | * @version: The version number to encode. |
| 1292 | * @features: The features information to encode. |
| 1293 | */ |
| 1294 | static void tx_cmd_version(struct glink_transport_if *if_ptr, uint32_t version, |
| 1295 | uint32_t features) |
| 1296 | { |
| 1297 | struct command { |
| 1298 | uint16_t id; |
| 1299 | uint16_t version; |
| 1300 | uint32_t features; |
| 1301 | }; |
| 1302 | struct command cmd; |
| 1303 | struct edge_info *einfo; |
| 1304 | int rcu_id; |
| 1305 | |
| 1306 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 1307 | |
| 1308 | rcu_id = srcu_read_lock(&einfo->use_ref); |
| 1309 | if (einfo->in_ssr) { |
| 1310 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1311 | return; |
| 1312 | } |
| 1313 | |
| 1314 | cmd.id = VERSION_CMD; |
| 1315 | cmd.version = version; |
| 1316 | cmd.features = features; |
| 1317 | |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 1318 | SMEM_IPC_LOG(einfo, __func__, cmd.id, cmd.version, cmd.features); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 1319 | fifo_tx(einfo, &cmd, sizeof(cmd)); |
| 1320 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1321 | } |
| 1322 | |
| 1323 | /** |
| 1324 | * tx_cmd_version_ack() - convert a version ack cmd to wire format and transmit |
| 1325 | * @if_ptr: The transport to transmit on. |
| 1326 | * @version: The version number to encode. |
| 1327 | * @features: The features information to encode. |
| 1328 | */ |
| 1329 | static void tx_cmd_version_ack(struct glink_transport_if *if_ptr, |
| 1330 | uint32_t version, |
| 1331 | uint32_t features) |
| 1332 | { |
| 1333 | struct command { |
| 1334 | uint16_t id; |
| 1335 | uint16_t version; |
| 1336 | uint32_t features; |
| 1337 | }; |
| 1338 | struct command cmd; |
| 1339 | struct edge_info *einfo; |
| 1340 | int rcu_id; |
| 1341 | |
| 1342 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 1343 | |
| 1344 | rcu_id = srcu_read_lock(&einfo->use_ref); |
| 1345 | if (einfo->in_ssr) { |
| 1346 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1347 | return; |
| 1348 | } |
| 1349 | |
| 1350 | cmd.id = VERSION_ACK_CMD; |
| 1351 | cmd.version = version; |
| 1352 | cmd.features = features; |
| 1353 | |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 1354 | SMEM_IPC_LOG(einfo, __func__, cmd.id, cmd.version, cmd.features); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 1355 | fifo_tx(einfo, &cmd, sizeof(cmd)); |
| 1356 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1357 | } |
| 1358 | |
| 1359 | /** |
| 1360 | * set_version() - activate a negotiated version and feature set |
| 1361 | * @if_ptr: The transport to configure. |
| 1362 | * @version: The version to use. |
| 1363 | * @features: The features to use. |
| 1364 | * |
| 1365 | * Return: The supported capabilities of the transport. |
| 1366 | */ |
| 1367 | static uint32_t set_version(struct glink_transport_if *if_ptr, uint32_t version, |
| 1368 | uint32_t features) |
| 1369 | { |
| 1370 | struct edge_info *einfo; |
| 1371 | uint32_t ret; |
| 1372 | int rcu_id; |
| 1373 | |
| 1374 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 1375 | |
| 1376 | rcu_id = srcu_read_lock(&einfo->use_ref); |
| 1377 | if (einfo->in_ssr) { |
| 1378 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1379 | return 0; |
| 1380 | } |
| 1381 | |
| 1382 | ret = einfo->intentless ? |
| 1383 | GCAP_INTENTLESS | GCAP_SIGNALS : GCAP_SIGNALS; |
| 1384 | |
| 1385 | if (features & TRACER_PKT_FEATURE) |
| 1386 | ret |= GCAP_TRACER_PKT; |
| 1387 | |
| 1388 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1389 | return ret; |
| 1390 | } |
| 1391 | |
| 1392 | /** |
| 1393 | * tx_cmd_ch_open() - convert a channel open cmd to wire format and transmit |
| 1394 | * @if_ptr: The transport to transmit on. |
| 1395 | * @lcid: The local channel id to encode. |
| 1396 | * @name: The channel name to encode. |
| 1397 | * @req_xprt: The transport the core would like to migrate this channel to. |
| 1398 | * |
| 1399 | * Return: 0 on success or standard Linux error code. |
| 1400 | */ |
| 1401 | static int tx_cmd_ch_open(struct glink_transport_if *if_ptr, uint32_t lcid, |
| 1402 | const char *name, uint16_t req_xprt) |
| 1403 | { |
| 1404 | struct command { |
| 1405 | uint16_t id; |
| 1406 | uint16_t lcid; |
| 1407 | uint32_t length; |
| 1408 | }; |
| 1409 | struct command cmd; |
| 1410 | struct edge_info *einfo; |
| 1411 | uint32_t buf_size; |
| 1412 | void *buf; |
| 1413 | int rcu_id; |
| 1414 | |
| 1415 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 1416 | |
| 1417 | rcu_id = srcu_read_lock(&einfo->use_ref); |
| 1418 | if (einfo->in_ssr) { |
| 1419 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1420 | return -EFAULT; |
| 1421 | } |
| 1422 | |
| 1423 | cmd.id = OPEN_CMD; |
| 1424 | cmd.lcid = lcid; |
| 1425 | cmd.length = strlen(name) + 1; |
| 1426 | |
| 1427 | buf_size = ALIGN(sizeof(cmd) + cmd.length, FIFO_ALIGNMENT); |
| 1428 | |
| 1429 | buf = kzalloc(buf_size, GFP_KERNEL); |
| 1430 | if (!buf) { |
| 1431 | GLINK_ERR("%s: malloc fail for %d size buf\n", |
| 1432 | __func__, buf_size); |
| 1433 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1434 | return -ENOMEM; |
| 1435 | } |
| 1436 | |
| 1437 | memcpy(buf, &cmd, sizeof(cmd)); |
| 1438 | memcpy(buf + sizeof(cmd), name, cmd.length); |
| 1439 | |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 1440 | SMEM_IPC_LOG(einfo, __func__, cmd.id, cmd.lcid, cmd.length); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 1441 | fifo_tx(einfo, buf, buf_size); |
| 1442 | |
| 1443 | kfree(buf); |
| 1444 | |
| 1445 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1446 | return 0; |
| 1447 | } |
| 1448 | |
| 1449 | /** |
| 1450 | * tx_cmd_ch_close() - convert a channel close cmd to wire format and transmit |
| 1451 | * @if_ptr: The transport to transmit on. |
| 1452 | * @lcid: The local channel id to encode. |
| 1453 | * |
| 1454 | * Return: 0 on success or standard Linux error code. |
| 1455 | */ |
| 1456 | static int tx_cmd_ch_close(struct glink_transport_if *if_ptr, uint32_t lcid) |
| 1457 | { |
| 1458 | struct command { |
| 1459 | uint16_t id; |
| 1460 | uint16_t lcid; |
| 1461 | uint32_t reserved; |
| 1462 | }; |
| 1463 | struct command cmd; |
| 1464 | struct edge_info *einfo; |
| 1465 | int rcu_id; |
| 1466 | |
| 1467 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 1468 | |
| 1469 | rcu_id = srcu_read_lock(&einfo->use_ref); |
| 1470 | if (einfo->in_ssr) { |
| 1471 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1472 | return -EFAULT; |
| 1473 | } |
| 1474 | |
| 1475 | cmd.id = CLOSE_CMD; |
| 1476 | cmd.lcid = lcid; |
| 1477 | cmd.reserved = 0; |
| 1478 | |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 1479 | SMEM_IPC_LOG(einfo, __func__, cmd.id, cmd.lcid, cmd.reserved); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 1480 | fifo_tx(einfo, &cmd, sizeof(cmd)); |
| 1481 | |
| 1482 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1483 | return 0; |
| 1484 | } |
| 1485 | |
| 1486 | /** |
| 1487 | * tx_cmd_ch_remote_open_ack() - convert a channel open ack cmd to wire format |
| 1488 | * and transmit |
| 1489 | * @if_ptr: The transport to transmit on. |
| 1490 | * @rcid: The remote channel id to encode. |
| 1491 | * @xprt_resp: The response to a transport migration request. |
| 1492 | */ |
| 1493 | static void tx_cmd_ch_remote_open_ack(struct glink_transport_if *if_ptr, |
| 1494 | uint32_t rcid, uint16_t xprt_resp) |
| 1495 | { |
| 1496 | struct command { |
| 1497 | uint16_t id; |
| 1498 | uint16_t rcid; |
| 1499 | uint32_t reserved; |
| 1500 | }; |
| 1501 | struct command cmd; |
| 1502 | struct edge_info *einfo; |
| 1503 | int rcu_id; |
| 1504 | |
| 1505 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 1506 | |
| 1507 | rcu_id = srcu_read_lock(&einfo->use_ref); |
| 1508 | if (einfo->in_ssr) { |
| 1509 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1510 | return; |
| 1511 | } |
| 1512 | |
| 1513 | cmd.id = OPEN_ACK_CMD; |
| 1514 | cmd.rcid = rcid; |
| 1515 | cmd.reserved = 0; |
| 1516 | |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 1517 | SMEM_IPC_LOG(einfo, __func__, cmd.id, cmd.rcid, cmd.reserved); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 1518 | fifo_tx(einfo, &cmd, sizeof(cmd)); |
| 1519 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1520 | } |
| 1521 | |
| 1522 | /** |
| 1523 | * tx_cmd_ch_remote_close_ack() - convert a channel close ack cmd to wire format |
| 1524 | * and transmit |
| 1525 | * @if_ptr: The transport to transmit on. |
| 1526 | * @rcid: The remote channel id to encode. |
| 1527 | */ |
| 1528 | static void tx_cmd_ch_remote_close_ack(struct glink_transport_if *if_ptr, |
| 1529 | uint32_t rcid) |
| 1530 | { |
| 1531 | struct command { |
| 1532 | uint16_t id; |
| 1533 | uint16_t rcid; |
| 1534 | uint32_t reserved; |
| 1535 | }; |
| 1536 | struct command cmd; |
| 1537 | struct edge_info *einfo; |
| 1538 | int rcu_id; |
| 1539 | |
| 1540 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 1541 | |
| 1542 | rcu_id = srcu_read_lock(&einfo->use_ref); |
| 1543 | if (einfo->in_ssr) { |
| 1544 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1545 | return; |
| 1546 | } |
| 1547 | |
| 1548 | cmd.id = CLOSE_ACK_CMD; |
| 1549 | cmd.rcid = rcid; |
| 1550 | cmd.reserved = 0; |
| 1551 | |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 1552 | SMEM_IPC_LOG(einfo, __func__, cmd.id, cmd.rcid, cmd.reserved); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 1553 | fifo_tx(einfo, &cmd, sizeof(cmd)); |
| 1554 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1555 | } |
| 1556 | |
| 1557 | /** |
Dhoat Harpal | e481137 | 2017-12-18 21:05:20 +0530 | [diff] [blame] | 1558 | * subsys_up() - process a subsystem up notification |
| 1559 | * @if_ptr: The transport which is up |
| 1560 | * |
| 1561 | */ |
| 1562 | static void subsys_up(struct glink_transport_if *if_ptr) |
| 1563 | { |
| 1564 | struct edge_info *einfo; |
| 1565 | |
| 1566 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
Dhoat Harpal | b22ef4e | 2018-05-24 14:09:06 +0530 | [diff] [blame] | 1567 | einfo->in_ssr = false; |
Dhoat Harpal | e481137 | 2017-12-18 21:05:20 +0530 | [diff] [blame] | 1568 | if (!einfo->rx_fifo) { |
| 1569 | if (!get_rx_fifo(einfo)) |
| 1570 | return; |
Dhoat Harpal | e481137 | 2017-12-18 21:05:20 +0530 | [diff] [blame] | 1571 | einfo->xprt_if.glink_core_if_ptr->link_up(&einfo->xprt_if); |
| 1572 | } |
| 1573 | } |
| 1574 | |
| 1575 | /** |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 1576 | * ssr() - process a subsystem restart notification of a transport |
| 1577 | * @if_ptr: The transport to restart |
| 1578 | * |
| 1579 | * Return: 0 on success or standard Linux error code. |
| 1580 | */ |
| 1581 | static int ssr(struct glink_transport_if *if_ptr) |
| 1582 | { |
| 1583 | struct edge_info *einfo; |
| 1584 | struct deferred_cmd *cmd; |
| 1585 | |
| 1586 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 1587 | |
| 1588 | BUG_ON(einfo->remote_proc_id == SMEM_RPM); |
| 1589 | |
| 1590 | einfo->in_ssr = true; |
| 1591 | wake_up_all(&einfo->tx_blocked_queue); |
| 1592 | |
| 1593 | synchronize_srcu(&einfo->use_ref); |
| 1594 | |
| 1595 | while (!list_empty(&einfo->deferred_cmds)) { |
| 1596 | cmd = list_first_entry(&einfo->deferred_cmds, |
| 1597 | struct deferred_cmd, list_node); |
| 1598 | list_del(&cmd->list_node); |
| 1599 | kfree(cmd->data); |
| 1600 | kfree(cmd); |
| 1601 | } |
| 1602 | |
| 1603 | einfo->tx_resume_needed = false; |
| 1604 | einfo->tx_blocked_signal_sent = false; |
| 1605 | einfo->rx_fifo = NULL; |
| 1606 | einfo->rx_fifo_size = 0; |
| 1607 | einfo->tx_ch_desc->write_index = 0; |
| 1608 | einfo->rx_ch_desc->read_index = 0; |
| 1609 | einfo->xprt_if.glink_core_if_ptr->link_down(&einfo->xprt_if); |
| 1610 | |
| 1611 | return 0; |
| 1612 | } |
| 1613 | |
| 1614 | /** |
| 1615 | * int wait_link_down() - Check status of read/write indices |
| 1616 | * @if_ptr: The transport to check |
| 1617 | * |
| 1618 | * Return: 1 if indices are all zero, 0 otherwise |
| 1619 | */ |
| 1620 | int wait_link_down(struct glink_transport_if *if_ptr) |
| 1621 | { |
| 1622 | struct edge_info *einfo; |
| 1623 | |
| 1624 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 1625 | |
| 1626 | if (einfo->tx_ch_desc->write_index == 0 && |
| 1627 | einfo->tx_ch_desc->read_index == 0 && |
| 1628 | einfo->rx_ch_desc->write_index == 0 && |
| 1629 | einfo->rx_ch_desc->read_index == 0) |
| 1630 | return 1; |
| 1631 | else |
| 1632 | return 0; |
| 1633 | } |
| 1634 | |
| 1635 | /** |
| 1636 | * allocate_rx_intent() - allocate/reserve space for RX Intent |
| 1637 | * @if_ptr: The transport the intent is associated with. |
| 1638 | * @size: size of intent. |
| 1639 | * @intent: Pointer to the intent structure. |
| 1640 | * |
| 1641 | * Assign "data" with the buffer created, since the transport creates |
| 1642 | * a linear buffer and "iovec" with the "intent" itself, so that |
| 1643 | * the data can be passed to a client that receives only vector buffer. |
| 1644 | * Note that returning NULL for the pointer is valid (it means that space has |
| 1645 | * been reserved, but the actual pointer will be provided later). |
| 1646 | * |
| 1647 | * Return: 0 on success or standard Linux error code. |
| 1648 | */ |
| 1649 | static int allocate_rx_intent(struct glink_transport_if *if_ptr, size_t size, |
| 1650 | struct glink_core_rx_intent *intent) |
| 1651 | { |
| 1652 | void *t; |
| 1653 | |
| 1654 | t = kmalloc(size, GFP_KERNEL); |
| 1655 | if (!t) |
| 1656 | return -ENOMEM; |
| 1657 | |
| 1658 | intent->data = t; |
| 1659 | intent->iovec = (void *)intent; |
| 1660 | intent->vprovider = rx_linear_vbuf_provider; |
| 1661 | intent->pprovider = NULL; |
| 1662 | return 0; |
| 1663 | } |
| 1664 | |
| 1665 | /** |
| 1666 | * deallocate_rx_intent() - Deallocate space created for RX Intent |
| 1667 | * @if_ptr: The transport the intent is associated with. |
| 1668 | * @intent: Pointer to the intent structure. |
| 1669 | * |
| 1670 | * Return: 0 on success or standard Linux error code. |
| 1671 | */ |
| 1672 | static int deallocate_rx_intent(struct glink_transport_if *if_ptr, |
| 1673 | struct glink_core_rx_intent *intent) |
| 1674 | { |
| 1675 | if (!intent || !intent->data) |
| 1676 | return -EINVAL; |
| 1677 | |
| 1678 | kfree(intent->data); |
| 1679 | intent->data = NULL; |
| 1680 | intent->iovec = NULL; |
| 1681 | intent->vprovider = NULL; |
| 1682 | return 0; |
| 1683 | } |
| 1684 | |
| 1685 | /** |
| 1686 | * tx_cmd_local_rx_intent() - convert an rx intent cmd to wire format and |
| 1687 | * transmit |
| 1688 | * @if_ptr: The transport to transmit on. |
| 1689 | * @lcid: The local channel id to encode. |
| 1690 | * @size: The intent size to encode. |
| 1691 | * @liid: The local intent id to encode. |
| 1692 | * |
| 1693 | * Return: 0 on success or standard Linux error code. |
| 1694 | */ |
| 1695 | static int tx_cmd_local_rx_intent(struct glink_transport_if *if_ptr, |
| 1696 | uint32_t lcid, size_t size, uint32_t liid) |
| 1697 | { |
| 1698 | struct command { |
| 1699 | uint16_t id; |
| 1700 | uint16_t lcid; |
| 1701 | uint32_t count; |
| 1702 | uint32_t size; |
| 1703 | uint32_t liid; |
| 1704 | }; |
| 1705 | struct command cmd; |
| 1706 | struct edge_info *einfo; |
| 1707 | int rcu_id; |
| 1708 | |
| 1709 | if (size > UINT_MAX) { |
| 1710 | pr_err("%s: size %zu is too large to encode\n", __func__, size); |
| 1711 | return -EMSGSIZE; |
| 1712 | } |
| 1713 | |
| 1714 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 1715 | |
| 1716 | if (einfo->intentless) |
| 1717 | return -EOPNOTSUPP; |
| 1718 | |
| 1719 | rcu_id = srcu_read_lock(&einfo->use_ref); |
| 1720 | if (einfo->in_ssr) { |
| 1721 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1722 | return -EFAULT; |
| 1723 | } |
| 1724 | |
| 1725 | cmd.id = RX_INTENT_CMD; |
| 1726 | cmd.lcid = lcid; |
| 1727 | cmd.count = 1; |
| 1728 | cmd.size = size; |
| 1729 | cmd.liid = liid; |
| 1730 | |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 1731 | SMEM_IPC_LOG(einfo, __func__, cmd.id, cmd.lcid, cmd.count); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 1732 | fifo_tx(einfo, &cmd, sizeof(cmd)); |
| 1733 | |
| 1734 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1735 | return 0; |
| 1736 | } |
| 1737 | |
| 1738 | /** |
| 1739 | * tx_cmd_local_rx_done() - convert an rx done cmd to wire format and transmit |
| 1740 | * @if_ptr: The transport to transmit on. |
| 1741 | * @lcid: The local channel id to encode. |
| 1742 | * @liid: The local intent id to encode. |
| 1743 | * @reuse: Reuse the consumed intent. |
| 1744 | */ |
| 1745 | static void tx_cmd_local_rx_done(struct glink_transport_if *if_ptr, |
| 1746 | uint32_t lcid, uint32_t liid, bool reuse) |
| 1747 | { |
| 1748 | struct command { |
| 1749 | uint16_t id; |
| 1750 | uint16_t lcid; |
| 1751 | uint32_t liid; |
| 1752 | }; |
| 1753 | struct command cmd; |
| 1754 | struct edge_info *einfo; |
| 1755 | int rcu_id; |
| 1756 | |
| 1757 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 1758 | |
| 1759 | if (einfo->intentless) |
| 1760 | return; |
| 1761 | |
| 1762 | rcu_id = srcu_read_lock(&einfo->use_ref); |
| 1763 | if (einfo->in_ssr) { |
| 1764 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1765 | return; |
| 1766 | } |
| 1767 | |
| 1768 | cmd.id = reuse ? RX_DONE_W_REUSE_CMD : RX_DONE_CMD; |
| 1769 | cmd.lcid = lcid; |
| 1770 | cmd.liid = liid; |
| 1771 | |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 1772 | SMEM_IPC_LOG(einfo, __func__, cmd.id, cmd.lcid, cmd.liid); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 1773 | fifo_tx(einfo, &cmd, sizeof(cmd)); |
| 1774 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1775 | } |
| 1776 | |
| 1777 | /** |
| 1778 | * tx_cmd_rx_intent_req() - convert an rx intent request cmd to wire format and |
| 1779 | * transmit |
| 1780 | * @if_ptr: The transport to transmit on. |
| 1781 | * @lcid: The local channel id to encode. |
| 1782 | * @size: The requested intent size to encode. |
| 1783 | * |
| 1784 | * Return: 0 on success or standard Linux error code. |
| 1785 | */ |
| 1786 | static int tx_cmd_rx_intent_req(struct glink_transport_if *if_ptr, |
| 1787 | uint32_t lcid, size_t size) |
| 1788 | { |
| 1789 | struct command { |
| 1790 | uint16_t id; |
| 1791 | uint16_t lcid; |
| 1792 | uint32_t size; |
| 1793 | }; |
| 1794 | struct command cmd; |
| 1795 | struct edge_info *einfo; |
| 1796 | int rcu_id; |
| 1797 | |
| 1798 | if (size > UINT_MAX) { |
| 1799 | pr_err("%s: size %zu is too large to encode\n", __func__, size); |
| 1800 | return -EMSGSIZE; |
| 1801 | } |
| 1802 | |
| 1803 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 1804 | |
| 1805 | if (einfo->intentless) |
| 1806 | return -EOPNOTSUPP; |
| 1807 | |
| 1808 | rcu_id = srcu_read_lock(&einfo->use_ref); |
| 1809 | if (einfo->in_ssr) { |
| 1810 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1811 | return -EFAULT; |
| 1812 | } |
| 1813 | |
| 1814 | cmd.id = RX_INTENT_REQ_CMD, |
| 1815 | cmd.lcid = lcid; |
| 1816 | cmd.size = size; |
| 1817 | |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 1818 | SMEM_IPC_LOG(einfo, __func__, cmd.id, cmd.lcid, cmd.size); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 1819 | fifo_tx(einfo, &cmd, sizeof(cmd)); |
| 1820 | |
| 1821 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1822 | return 0; |
| 1823 | } |
| 1824 | |
| 1825 | /** |
| 1826 | * tx_cmd_rx_intent_req_ack() - convert an rx intent request ack cmd to wire |
| 1827 | * format and transmit |
| 1828 | * @if_ptr: The transport to transmit on. |
| 1829 | * @lcid: The local channel id to encode. |
| 1830 | * @granted: The request response to encode. |
| 1831 | * |
| 1832 | * Return: 0 on success or standard Linux error code. |
| 1833 | */ |
| 1834 | static int tx_cmd_remote_rx_intent_req_ack(struct glink_transport_if *if_ptr, |
| 1835 | uint32_t lcid, bool granted) |
| 1836 | { |
| 1837 | struct command { |
| 1838 | uint16_t id; |
| 1839 | uint16_t lcid; |
| 1840 | uint32_t response; |
| 1841 | }; |
| 1842 | struct command cmd; |
| 1843 | struct edge_info *einfo; |
| 1844 | int rcu_id; |
| 1845 | |
| 1846 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 1847 | |
| 1848 | if (einfo->intentless) |
| 1849 | return -EOPNOTSUPP; |
| 1850 | |
| 1851 | rcu_id = srcu_read_lock(&einfo->use_ref); |
| 1852 | if (einfo->in_ssr) { |
| 1853 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1854 | return -EFAULT; |
| 1855 | } |
| 1856 | |
| 1857 | cmd.id = RX_INTENT_REQ_ACK_CMD, |
| 1858 | cmd.lcid = lcid; |
| 1859 | if (granted) |
| 1860 | cmd.response = 1; |
| 1861 | else |
| 1862 | cmd.response = 0; |
| 1863 | |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 1864 | SMEM_IPC_LOG(einfo, __func__, cmd.id, cmd.lcid, cmd.response); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 1865 | fifo_tx(einfo, &cmd, sizeof(cmd)); |
| 1866 | |
| 1867 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1868 | return 0; |
| 1869 | } |
| 1870 | |
| 1871 | /** |
| 1872 | * tx_cmd_set_sigs() - convert a signals ack cmd to wire format and transmit |
| 1873 | * @if_ptr: The transport to transmit on. |
| 1874 | * @lcid: The local channel id to encode. |
| 1875 | * @sigs: The signals to encode. |
| 1876 | * |
| 1877 | * Return: 0 on success or standard Linux error code. |
| 1878 | */ |
| 1879 | static int tx_cmd_set_sigs(struct glink_transport_if *if_ptr, uint32_t lcid, |
| 1880 | uint32_t sigs) |
| 1881 | { |
| 1882 | struct command { |
| 1883 | uint16_t id; |
| 1884 | uint16_t lcid; |
| 1885 | uint32_t sigs; |
| 1886 | }; |
| 1887 | struct command cmd; |
| 1888 | struct edge_info *einfo; |
| 1889 | int rcu_id; |
| 1890 | |
| 1891 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 1892 | |
| 1893 | rcu_id = srcu_read_lock(&einfo->use_ref); |
| 1894 | if (einfo->in_ssr) { |
| 1895 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1896 | return -EFAULT; |
| 1897 | } |
| 1898 | |
| 1899 | cmd.id = SIGNALS_CMD, |
| 1900 | cmd.lcid = lcid; |
| 1901 | cmd.sigs = sigs; |
| 1902 | |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 1903 | SMEM_IPC_LOG(einfo, __func__, cmd.id, cmd.lcid, cmd.sigs); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 1904 | fifo_tx(einfo, &cmd, sizeof(cmd)); |
| 1905 | |
| 1906 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1907 | return 0; |
| 1908 | } |
| 1909 | |
| 1910 | /** |
| 1911 | * poll() - poll for data on a channel |
| 1912 | * @if_ptr: The transport the channel exists on. |
| 1913 | * @lcid: The local channel id. |
| 1914 | * |
| 1915 | * Return: 0 if no data available, 1 if data available. |
| 1916 | */ |
| 1917 | static int poll(struct glink_transport_if *if_ptr, uint32_t lcid) |
| 1918 | { |
| 1919 | struct edge_info *einfo; |
| 1920 | int rcu_id; |
| 1921 | |
| 1922 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 1923 | |
| 1924 | rcu_id = srcu_read_lock(&einfo->use_ref); |
| 1925 | if (einfo->in_ssr) { |
| 1926 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1927 | return -EFAULT; |
| 1928 | } |
| 1929 | |
| 1930 | if (fifo_read_avail(einfo)) { |
| 1931 | __rx_worker(einfo, true); |
| 1932 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1933 | return 1; |
| 1934 | } |
| 1935 | |
| 1936 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1937 | return 0; |
| 1938 | } |
| 1939 | |
| 1940 | /** |
| 1941 | * mask_rx_irq() - mask the receive irq for a channel |
| 1942 | * @if_ptr: The transport the channel exists on. |
| 1943 | * @lcid: The local channel id for the channel. |
| 1944 | * @mask: True to mask the irq, false to unmask. |
| 1945 | * @pstruct: Platform defined structure for handling the masking. |
| 1946 | * |
| 1947 | * Return: 0 on success or standard Linux error code. |
| 1948 | */ |
| 1949 | static int mask_rx_irq(struct glink_transport_if *if_ptr, uint32_t lcid, |
| 1950 | bool mask, void *pstruct) |
| 1951 | { |
| 1952 | struct edge_info *einfo; |
| 1953 | struct irq_chip *irq_chip; |
| 1954 | struct irq_data *irq_data; |
| 1955 | int rcu_id; |
| 1956 | |
| 1957 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 1958 | |
| 1959 | rcu_id = srcu_read_lock(&einfo->use_ref); |
| 1960 | if (einfo->in_ssr) { |
| 1961 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1962 | return -EFAULT; |
| 1963 | } |
| 1964 | |
| 1965 | irq_chip = irq_get_chip(einfo->irq_line); |
| 1966 | if (!irq_chip) { |
| 1967 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1968 | return -ENODEV; |
| 1969 | } |
| 1970 | |
| 1971 | irq_data = irq_get_irq_data(einfo->irq_line); |
| 1972 | if (!irq_data) { |
| 1973 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1974 | return -ENODEV; |
| 1975 | } |
| 1976 | |
| 1977 | if (mask) { |
| 1978 | irq_chip->irq_mask(irq_data); |
| 1979 | einfo->irq_disabled = true; |
| 1980 | if (pstruct) |
| 1981 | irq_set_affinity(einfo->irq_line, pstruct); |
| 1982 | } else { |
| 1983 | irq_chip->irq_unmask(irq_data); |
| 1984 | einfo->irq_disabled = false; |
| 1985 | } |
| 1986 | |
| 1987 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 1988 | return 0; |
| 1989 | } |
| 1990 | |
| 1991 | /** |
| 1992 | * tx_data() - convert a data/tracer_pkt to wire format and transmit |
| 1993 | * @if_ptr: The transport to transmit on. |
| 1994 | * @cmd_id: The command ID to transmit. |
| 1995 | * @lcid: The local channel id to encode. |
| 1996 | * @pctx: The data to encode. |
| 1997 | * |
| 1998 | * Return: Number of bytes written or standard Linux error code. |
| 1999 | */ |
| 2000 | static int tx_data(struct glink_transport_if *if_ptr, uint16_t cmd_id, |
| 2001 | uint32_t lcid, struct glink_core_tx_pkt *pctx) |
| 2002 | { |
| 2003 | struct command { |
| 2004 | uint16_t id; |
| 2005 | uint16_t lcid; |
| 2006 | uint32_t riid; |
| 2007 | uint32_t size; |
| 2008 | uint32_t size_left; |
| 2009 | }; |
| 2010 | struct command cmd; |
| 2011 | struct edge_info *einfo; |
| 2012 | uint32_t size; |
| 2013 | uint32_t zeros_size; |
| 2014 | const void *data_start; |
| 2015 | char zeros[FIFO_ALIGNMENT] = { 0 }; |
| 2016 | unsigned long flags; |
| 2017 | size_t tx_size = 0; |
| 2018 | int rcu_id; |
| 2019 | int ret; |
| 2020 | |
| 2021 | if (pctx->size < pctx->size_remaining) { |
| 2022 | GLINK_ERR("%s: size remaining exceeds size. Resetting.\n", |
| 2023 | __func__); |
| 2024 | pctx->size_remaining = pctx->size; |
| 2025 | } |
| 2026 | if (!pctx->size_remaining) |
| 2027 | return 0; |
| 2028 | |
| 2029 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 2030 | |
| 2031 | rcu_id = srcu_read_lock(&einfo->use_ref); |
| 2032 | if (einfo->in_ssr) { |
| 2033 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 2034 | return -EFAULT; |
| 2035 | } |
| 2036 | |
| 2037 | if (einfo->intentless && |
| 2038 | (pctx->size_remaining != pctx->size || cmd_id == TRACER_PKT_CMD)) { |
| 2039 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 2040 | return -EINVAL; |
| 2041 | } |
| 2042 | |
| 2043 | if (cmd_id == TX_DATA_CMD) { |
| 2044 | if (pctx->size_remaining == pctx->size) |
| 2045 | cmd.id = TX_DATA_CMD; |
| 2046 | else |
| 2047 | cmd.id = TX_DATA_CONT_CMD; |
| 2048 | } else { |
| 2049 | if (pctx->size_remaining == pctx->size) |
| 2050 | cmd.id = TRACER_PKT_CMD; |
| 2051 | else |
| 2052 | cmd.id = TRACER_PKT_CONT_CMD; |
| 2053 | } |
| 2054 | cmd.lcid = lcid; |
| 2055 | cmd.riid = pctx->riid; |
| 2056 | data_start = get_tx_vaddr(pctx, pctx->size - pctx->size_remaining, |
| 2057 | &tx_size); |
| 2058 | if (!data_start) { |
| 2059 | GLINK_ERR("%s: invalid data_start\n", __func__); |
| 2060 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 2061 | return -EINVAL; |
| 2062 | } |
| 2063 | |
| 2064 | spin_lock_irqsave(&einfo->write_lock, flags); |
| 2065 | size = fifo_write_avail(einfo); |
| 2066 | |
| 2067 | /* Intentless clients expect a complete commit or instant failure */ |
| 2068 | if (einfo->intentless && size < sizeof(cmd) + pctx->size) { |
| 2069 | spin_unlock_irqrestore(&einfo->write_lock, flags); |
| 2070 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 2071 | return -ENOSPC; |
| 2072 | } |
| 2073 | |
| 2074 | /* Need enough space to write the command and some data */ |
| 2075 | if (size <= sizeof(cmd)) { |
| 2076 | einfo->tx_resume_needed = true; |
Dhoat Harpal | 54c7fb8 | 2017-12-14 17:24:17 +0530 | [diff] [blame] | 2077 | send_tx_blocked_signal(einfo); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2078 | spin_unlock_irqrestore(&einfo->write_lock, flags); |
| 2079 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 2080 | return -EAGAIN; |
| 2081 | } |
| 2082 | size -= sizeof(cmd); |
| 2083 | if (size > tx_size) |
| 2084 | size = tx_size; |
| 2085 | |
| 2086 | cmd.size = size; |
| 2087 | pctx->size_remaining -= size; |
| 2088 | cmd.size_left = pctx->size_remaining; |
| 2089 | zeros_size = ALIGN(size, FIFO_ALIGNMENT) - cmd.size; |
| 2090 | if (cmd.id == TRACER_PKT_CMD) |
| 2091 | tracer_pkt_log_event((void *)(pctx->data), GLINK_XPRT_TX); |
| 2092 | |
| 2093 | ret = fifo_write_complex(einfo, &cmd, sizeof(cmd), data_start, size, |
| 2094 | zeros, zeros_size); |
| 2095 | if (ret < 0) { |
| 2096 | spin_unlock_irqrestore(&einfo->write_lock, flags); |
| 2097 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 2098 | return ret; |
| 2099 | } |
| 2100 | |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 2101 | SMEM_IPC_LOG(einfo, __func__, cmd.id, cmd.lcid, cmd.riid); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2102 | GLINK_DBG("%s %s: lcid[%u] riid[%u] cmd[%d], size[%d], size_left[%d]\n", |
| 2103 | "<SMEM>", __func__, cmd.lcid, cmd.riid, cmd.id, cmd.size, |
| 2104 | cmd.size_left); |
| 2105 | spin_unlock_irqrestore(&einfo->write_lock, flags); |
| 2106 | |
| 2107 | /* Fake tx_done for intentless since its not supported over the wire */ |
| 2108 | if (einfo->intentless) { |
| 2109 | spin_lock_irqsave(&einfo->rx_lock, flags); |
| 2110 | cmd.id = RX_DONE_CMD; |
| 2111 | cmd.lcid = pctx->rcid; |
| 2112 | queue_cmd(einfo, &cmd, NULL); |
| 2113 | spin_unlock_irqrestore(&einfo->rx_lock, flags); |
| 2114 | } |
| 2115 | |
| 2116 | srcu_read_unlock(&einfo->use_ref, rcu_id); |
| 2117 | return cmd.size; |
| 2118 | } |
| 2119 | |
| 2120 | /** |
| 2121 | * tx() - convert a data transmit cmd to wire format and transmit |
| 2122 | * @if_ptr: The transport to transmit on. |
| 2123 | * @lcid: The local channel id to encode. |
| 2124 | * @pctx: The data to encode. |
| 2125 | * |
| 2126 | * Return: Number of bytes written or standard Linux error code. |
| 2127 | */ |
| 2128 | static int tx(struct glink_transport_if *if_ptr, uint32_t lcid, |
| 2129 | struct glink_core_tx_pkt *pctx) |
| 2130 | { |
| 2131 | return tx_data(if_ptr, TX_DATA_CMD, lcid, pctx); |
| 2132 | } |
| 2133 | |
| 2134 | /** |
| 2135 | * tx_cmd_tracer_pkt() - convert a tracer packet cmd to wire format and transmit |
| 2136 | * @if_ptr: The transport to transmit on. |
| 2137 | * @lcid: The local channel id to encode. |
| 2138 | * @pctx: The data to encode. |
| 2139 | * |
| 2140 | * Return: Number of bytes written or standard Linux error code. |
| 2141 | */ |
| 2142 | static int tx_cmd_tracer_pkt(struct glink_transport_if *if_ptr, uint32_t lcid, |
| 2143 | struct glink_core_tx_pkt *pctx) |
| 2144 | { |
| 2145 | return tx_data(if_ptr, TRACER_PKT_CMD, lcid, pctx); |
| 2146 | } |
| 2147 | |
| 2148 | /** |
| 2149 | * get_power_vote_ramp_time() - Get the ramp time required for the power |
| 2150 | * votes to be applied |
| 2151 | * @if_ptr: The transport interface on which power voting is requested. |
| 2152 | * @state: The power state for which ramp time is required. |
| 2153 | * |
| 2154 | * Return: The ramp time specific to the power state, standard error otherwise. |
| 2155 | */ |
| 2156 | static unsigned long get_power_vote_ramp_time( |
| 2157 | struct glink_transport_if *if_ptr, |
| 2158 | uint32_t state) |
| 2159 | { |
| 2160 | struct edge_info *einfo; |
| 2161 | |
| 2162 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 2163 | |
| 2164 | if (state >= einfo->num_pw_states || !(einfo->ramp_time_us)) |
| 2165 | return (unsigned long)ERR_PTR(-EINVAL); |
| 2166 | |
| 2167 | return einfo->ramp_time_us[state]; |
| 2168 | } |
| 2169 | |
| 2170 | /** |
| 2171 | * power_vote() - Update the power votes to meet qos requirement |
| 2172 | * @if_ptr: The transport interface on which power voting is requested. |
| 2173 | * @state: The power state for which the voting should be done. |
| 2174 | * |
| 2175 | * Return: 0 on Success, standard error otherwise. |
| 2176 | */ |
| 2177 | static int power_vote(struct glink_transport_if *if_ptr, uint32_t state) |
| 2178 | { |
| 2179 | return 0; |
| 2180 | } |
| 2181 | |
| 2182 | /** |
| 2183 | * power_unvote() - Remove the all the power votes |
| 2184 | * @if_ptr: The transport interface on which power voting is requested. |
| 2185 | * |
| 2186 | * Return: 0 on Success, standard error otherwise. |
| 2187 | */ |
| 2188 | static int power_unvote(struct glink_transport_if *if_ptr) |
| 2189 | { |
| 2190 | return 0; |
| 2191 | } |
| 2192 | |
| 2193 | /** |
Chris Lew | a9a78ae | 2017-05-11 16:47:37 -0700 | [diff] [blame] | 2194 | * rx_rt_vote() - Increment and RX thread RT vote |
| 2195 | * @if_ptr: The transport interface on which power voting is requested. |
| 2196 | * |
| 2197 | * Return: 0 on Success, standard error otherwise. |
| 2198 | */ |
| 2199 | static int rx_rt_vote(struct glink_transport_if *if_ptr) |
| 2200 | { |
| 2201 | struct edge_info *einfo; |
| 2202 | struct sched_param param = { .sched_priority = 1 }; |
| 2203 | int ret = 0; |
| 2204 | unsigned long flags; |
| 2205 | |
| 2206 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 2207 | spin_lock_irqsave(&einfo->rt_vote_lock, flags); |
| 2208 | if (!einfo->rt_votes) |
| 2209 | ret = sched_setscheduler_nocheck(einfo->task, SCHED_FIFO, |
| 2210 | ¶m); |
| 2211 | einfo->rt_votes++; |
| 2212 | spin_unlock_irqrestore(&einfo->rt_vote_lock, flags); |
| 2213 | return ret; |
| 2214 | } |
| 2215 | |
| 2216 | /** |
| 2217 | * rx_rt_unvote() - Remove a RX thread RT vote |
| 2218 | * @if_ptr: The transport interface on which power voting is requested. |
| 2219 | * |
| 2220 | * Return: 0 on Success, standard error otherwise. |
| 2221 | */ |
| 2222 | static int rx_rt_unvote(struct glink_transport_if *if_ptr) |
| 2223 | { |
| 2224 | struct edge_info *einfo; |
| 2225 | struct sched_param param = { .sched_priority = 0 }; |
| 2226 | int ret = 0; |
| 2227 | unsigned long flags; |
| 2228 | |
| 2229 | einfo = container_of(if_ptr, struct edge_info, xprt_if); |
| 2230 | spin_lock_irqsave(&einfo->rt_vote_lock, flags); |
| 2231 | einfo->rt_votes--; |
| 2232 | if (!einfo->rt_votes) |
| 2233 | ret = sched_setscheduler_nocheck(einfo->task, SCHED_NORMAL, |
| 2234 | ¶m); |
| 2235 | spin_unlock_irqrestore(&einfo->rt_vote_lock, flags); |
| 2236 | return ret; |
| 2237 | } |
| 2238 | |
| 2239 | /** |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2240 | * negotiate_features_v1() - determine what features of a version can be used |
| 2241 | * @if_ptr: The transport for which features are negotiated for. |
| 2242 | * @version: The version negotiated. |
| 2243 | * @features: The set of requested features. |
| 2244 | * |
| 2245 | * Return: What set of the requested features can be supported. |
| 2246 | */ |
| 2247 | static uint32_t negotiate_features_v1(struct glink_transport_if *if_ptr, |
| 2248 | const struct glink_core_version *version, |
| 2249 | uint32_t features) |
| 2250 | { |
| 2251 | return features & version->features; |
| 2252 | } |
| 2253 | |
| 2254 | /** |
| 2255 | * init_xprt_if() - initialize the xprt_if for an edge |
| 2256 | * @einfo: The edge to initialize. |
| 2257 | */ |
| 2258 | static void init_xprt_if(struct edge_info *einfo) |
| 2259 | { |
| 2260 | einfo->xprt_if.tx_cmd_version = tx_cmd_version; |
| 2261 | einfo->xprt_if.tx_cmd_version_ack = tx_cmd_version_ack; |
| 2262 | einfo->xprt_if.set_version = set_version; |
| 2263 | einfo->xprt_if.tx_cmd_ch_open = tx_cmd_ch_open; |
| 2264 | einfo->xprt_if.tx_cmd_ch_close = tx_cmd_ch_close; |
| 2265 | einfo->xprt_if.tx_cmd_ch_remote_open_ack = tx_cmd_ch_remote_open_ack; |
| 2266 | einfo->xprt_if.tx_cmd_ch_remote_close_ack = tx_cmd_ch_remote_close_ack; |
| 2267 | einfo->xprt_if.ssr = ssr; |
Dhoat Harpal | e481137 | 2017-12-18 21:05:20 +0530 | [diff] [blame] | 2268 | einfo->xprt_if.subsys_up = subsys_up; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2269 | einfo->xprt_if.allocate_rx_intent = allocate_rx_intent; |
| 2270 | einfo->xprt_if.deallocate_rx_intent = deallocate_rx_intent; |
| 2271 | einfo->xprt_if.tx_cmd_local_rx_intent = tx_cmd_local_rx_intent; |
| 2272 | einfo->xprt_if.tx_cmd_local_rx_done = tx_cmd_local_rx_done; |
| 2273 | einfo->xprt_if.tx = tx; |
| 2274 | einfo->xprt_if.tx_cmd_rx_intent_req = tx_cmd_rx_intent_req; |
| 2275 | einfo->xprt_if.tx_cmd_remote_rx_intent_req_ack = |
| 2276 | tx_cmd_remote_rx_intent_req_ack; |
| 2277 | einfo->xprt_if.tx_cmd_set_sigs = tx_cmd_set_sigs; |
| 2278 | einfo->xprt_if.poll = poll; |
| 2279 | einfo->xprt_if.mask_rx_irq = mask_rx_irq; |
| 2280 | einfo->xprt_if.wait_link_down = wait_link_down; |
| 2281 | einfo->xprt_if.tx_cmd_tracer_pkt = tx_cmd_tracer_pkt; |
| 2282 | einfo->xprt_if.get_power_vote_ramp_time = get_power_vote_ramp_time; |
| 2283 | einfo->xprt_if.power_vote = power_vote; |
| 2284 | einfo->xprt_if.power_unvote = power_unvote; |
Chris Lew | a9a78ae | 2017-05-11 16:47:37 -0700 | [diff] [blame] | 2285 | einfo->xprt_if.rx_rt_vote = rx_rt_vote; |
| 2286 | einfo->xprt_if.rx_rt_unvote = rx_rt_unvote; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2287 | } |
| 2288 | |
| 2289 | /** |
| 2290 | * init_xprt_cfg() - initialize the xprt_cfg for an edge |
| 2291 | * @einfo: The edge to initialize. |
| 2292 | * @name: The name of the remote side this edge communicates to. |
| 2293 | */ |
| 2294 | static void init_xprt_cfg(struct edge_info *einfo, const char *name) |
| 2295 | { |
| 2296 | einfo->xprt_cfg.name = XPRT_NAME; |
| 2297 | einfo->xprt_cfg.edge = name; |
| 2298 | einfo->xprt_cfg.versions = versions; |
| 2299 | einfo->xprt_cfg.versions_entries = ARRAY_SIZE(versions); |
| 2300 | einfo->xprt_cfg.max_cid = SZ_64K; |
| 2301 | einfo->xprt_cfg.max_iid = SZ_2G; |
| 2302 | } |
| 2303 | |
| 2304 | /** |
| 2305 | * parse_qos_dt_params() - Parse the power states from DT |
| 2306 | * @dev: Reference to the platform device for a specific edge. |
| 2307 | * @einfo: Edge information for the edge probe function is called. |
| 2308 | * |
| 2309 | * Return: 0 on success, standard error code otherwise. |
| 2310 | */ |
| 2311 | static int parse_qos_dt_params(struct device_node *node, |
| 2312 | struct edge_info *einfo) |
| 2313 | { |
| 2314 | int rc; |
| 2315 | int i; |
| 2316 | char *key; |
| 2317 | uint32_t *arr32; |
| 2318 | uint32_t num_states; |
| 2319 | |
| 2320 | key = "qcom,ramp-time"; |
| 2321 | if (!of_find_property(node, key, &num_states)) |
| 2322 | return -ENODEV; |
| 2323 | |
| 2324 | num_states /= sizeof(uint32_t); |
| 2325 | |
| 2326 | einfo->num_pw_states = num_states; |
| 2327 | |
| 2328 | arr32 = kmalloc_array(num_states, sizeof(uint32_t), GFP_KERNEL); |
| 2329 | if (!arr32) |
| 2330 | return -ENOMEM; |
| 2331 | |
| 2332 | einfo->ramp_time_us = kmalloc_array(num_states, sizeof(unsigned long), |
| 2333 | GFP_KERNEL); |
| 2334 | if (!einfo->ramp_time_us) { |
| 2335 | rc = -ENOMEM; |
| 2336 | goto mem_alloc_fail; |
| 2337 | } |
| 2338 | |
| 2339 | rc = of_property_read_u32_array(node, key, arr32, num_states); |
| 2340 | if (rc) { |
| 2341 | rc = -ENODEV; |
| 2342 | goto invalid_key; |
| 2343 | } |
| 2344 | for (i = 0; i < num_states; i++) |
| 2345 | einfo->ramp_time_us[i] = arr32[i]; |
| 2346 | |
| 2347 | rc = 0; |
Dhoat Harpal | 650c530 | 2017-08-03 20:27:38 +0530 | [diff] [blame] | 2348 | kfree(arr32); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2349 | return rc; |
| 2350 | |
| 2351 | invalid_key: |
| 2352 | kfree(einfo->ramp_time_us); |
| 2353 | mem_alloc_fail: |
| 2354 | kfree(arr32); |
| 2355 | return rc; |
| 2356 | } |
| 2357 | |
| 2358 | /** |
| 2359 | * subsys_name_to_id() - translate a subsystem name to a processor id |
| 2360 | * @name: The subsystem name to look up. |
| 2361 | * |
| 2362 | * Return: The processor id corresponding to @name or standard Linux error code. |
| 2363 | */ |
| 2364 | static int subsys_name_to_id(const char *name) |
| 2365 | { |
| 2366 | if (!name) |
| 2367 | return -ENODEV; |
| 2368 | |
| 2369 | if (!strcmp(name, "apss")) |
| 2370 | return SMEM_APPS; |
| 2371 | if (!strcmp(name, "dsps")) |
| 2372 | return SMEM_DSPS; |
| 2373 | if (!strcmp(name, "lpass")) |
| 2374 | return SMEM_Q6; |
| 2375 | if (!strcmp(name, "mpss")) |
| 2376 | return SMEM_MODEM; |
| 2377 | if (!strcmp(name, "rpm")) |
| 2378 | return SMEM_RPM; |
| 2379 | if (!strcmp(name, "wcnss")) |
| 2380 | return SMEM_WCNSS; |
| 2381 | if (!strcmp(name, "spss")) |
| 2382 | return SMEM_SPSS; |
| 2383 | if (!strcmp(name, "cdsp")) |
| 2384 | return SMEM_CDSP; |
| 2385 | return -ENODEV; |
| 2386 | } |
| 2387 | |
Chris Lew | 490a42a | 2017-10-02 15:20:54 -0700 | [diff] [blame] | 2388 | static void glink_set_affinity(struct edge_info *einfo, u32 *arr, size_t size) |
| 2389 | { |
| 2390 | struct cpumask cpumask; |
| 2391 | pid_t pid; |
| 2392 | int i; |
| 2393 | |
| 2394 | cpumask_clear(&cpumask); |
| 2395 | for (i = 0; i < size; i++) { |
| 2396 | if (arr[i] < num_possible_cpus()) |
| 2397 | cpumask_set_cpu(arr[i], &cpumask); |
| 2398 | } |
| 2399 | if (irq_set_affinity(einfo->irq_line, &cpumask)) |
| 2400 | pr_err("%s: Failed to set irq affinity\n", __func__); |
| 2401 | |
| 2402 | if (sched_setaffinity(einfo->task->pid, &cpumask)) |
| 2403 | pr_err("%s: Failed to set rx cpu affinity\n", __func__); |
| 2404 | |
| 2405 | pid = einfo->xprt_cfg.tx_task->pid; |
| 2406 | if (sched_setaffinity(pid, &cpumask)) |
| 2407 | pr_err("%s: Failed to set tx cpu affinity\n", __func__); |
| 2408 | } |
| 2409 | |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2410 | static int glink_smem_native_probe(struct platform_device *pdev) |
| 2411 | { |
| 2412 | struct device_node *node; |
| 2413 | struct device_node *phandle_node; |
| 2414 | struct edge_info *einfo; |
Chris Lew | 490a42a | 2017-10-02 15:20:54 -0700 | [diff] [blame] | 2415 | int rc, cpu_size; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2416 | char *key; |
| 2417 | const char *subsys_name; |
| 2418 | uint32_t irq_line; |
| 2419 | uint32_t irq_mask; |
| 2420 | struct resource *r; |
Chris Lew | 490a42a | 2017-10-02 15:20:54 -0700 | [diff] [blame] | 2421 | u32 *cpu_array; |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 2422 | char log_name[GLINK_NAME_SIZE*2+7] = {0}; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2423 | |
| 2424 | node = pdev->dev.of_node; |
| 2425 | |
| 2426 | einfo = kzalloc(sizeof(*einfo), GFP_KERNEL); |
| 2427 | if (!einfo) { |
| 2428 | rc = -ENOMEM; |
| 2429 | goto edge_info_alloc_fail; |
| 2430 | } |
| 2431 | |
| 2432 | key = "label"; |
| 2433 | subsys_name = of_get_property(node, key, NULL); |
| 2434 | if (!subsys_name) { |
| 2435 | pr_err("%s: missing key %s\n", __func__, key); |
| 2436 | rc = -ENODEV; |
| 2437 | goto missing_key; |
| 2438 | } |
| 2439 | |
| 2440 | key = "interrupts"; |
| 2441 | irq_line = irq_of_parse_and_map(node, 0); |
| 2442 | if (!irq_line) { |
| 2443 | pr_err("%s: missing key %s\n", __func__, key); |
| 2444 | rc = -ENODEV; |
| 2445 | goto missing_key; |
| 2446 | } |
| 2447 | |
| 2448 | key = "qcom,irq-mask"; |
| 2449 | rc = of_property_read_u32(node, key, &irq_mask); |
| 2450 | if (rc) { |
| 2451 | pr_err("%s: missing key %s\n", __func__, key); |
| 2452 | rc = -ENODEV; |
| 2453 | goto missing_key; |
| 2454 | } |
| 2455 | |
| 2456 | key = "irq-reg-base"; |
| 2457 | r = platform_get_resource_byname(pdev, IORESOURCE_MEM, key); |
| 2458 | if (!r) { |
| 2459 | pr_err("%s: missing key %s\n", __func__, key); |
| 2460 | rc = -ENODEV; |
| 2461 | goto missing_key; |
| 2462 | } |
| 2463 | |
| 2464 | if (subsys_name_to_id(subsys_name) == -ENODEV) { |
| 2465 | pr_err("%s: unknown subsystem: %s\n", __func__, subsys_name); |
| 2466 | rc = -ENODEV; |
| 2467 | goto invalid_key; |
| 2468 | } |
| 2469 | einfo->remote_proc_id = subsys_name_to_id(subsys_name); |
| 2470 | |
| 2471 | init_xprt_cfg(einfo, subsys_name); |
| 2472 | init_xprt_if(einfo); |
| 2473 | spin_lock_init(&einfo->write_lock); |
| 2474 | init_waitqueue_head(&einfo->tx_blocked_queue); |
Kyle Yan | 65be4a5 | 2016-10-31 15:05:00 -0700 | [diff] [blame] | 2475 | kthread_init_work(&einfo->kwork, rx_worker); |
| 2476 | kthread_init_worker(&einfo->kworker); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2477 | einfo->read_from_fifo = read_from_fifo; |
| 2478 | einfo->write_to_fifo = write_to_fifo; |
| 2479 | init_srcu_struct(&einfo->use_ref); |
| 2480 | spin_lock_init(&einfo->rx_lock); |
| 2481 | INIT_LIST_HEAD(&einfo->deferred_cmds); |
Chris Lew | a9a78ae | 2017-05-11 16:47:37 -0700 | [diff] [blame] | 2482 | spin_lock_init(&einfo->rt_vote_lock); |
| 2483 | einfo->rt_votes = 0; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2484 | |
| 2485 | mutex_lock(&probe_lock); |
| 2486 | if (edge_infos[einfo->remote_proc_id]) { |
| 2487 | pr_err("%s: duplicate subsys %s is not valid\n", __func__, |
| 2488 | subsys_name); |
| 2489 | rc = -ENODEV; |
| 2490 | mutex_unlock(&probe_lock); |
| 2491 | goto invalid_key; |
| 2492 | } |
| 2493 | edge_infos[einfo->remote_proc_id] = einfo; |
| 2494 | mutex_unlock(&probe_lock); |
| 2495 | |
| 2496 | einfo->out_irq_mask = irq_mask; |
| 2497 | einfo->out_irq_reg = ioremap_nocache(r->start, resource_size(r)); |
| 2498 | if (!einfo->out_irq_reg) { |
| 2499 | pr_err("%s: unable to map irq reg\n", __func__); |
| 2500 | rc = -ENOMEM; |
| 2501 | goto ioremap_fail; |
| 2502 | } |
| 2503 | |
| 2504 | einfo->task = kthread_run(kthread_worker_fn, &einfo->kworker, |
| 2505 | "smem_native_%s", subsys_name); |
| 2506 | if (IS_ERR(einfo->task)) { |
| 2507 | rc = PTR_ERR(einfo->task); |
| 2508 | pr_err("%s: kthread_run failed %d\n", __func__, rc); |
| 2509 | goto kthread_fail; |
| 2510 | } |
| 2511 | |
| 2512 | einfo->tx_ch_desc = smem_alloc(SMEM_GLINK_NATIVE_XPRT_DESCRIPTOR, |
| 2513 | SMEM_CH_DESC_SIZE, |
| 2514 | einfo->remote_proc_id, |
| 2515 | 0); |
| 2516 | if (PTR_ERR(einfo->tx_ch_desc) == -EPROBE_DEFER) { |
| 2517 | rc = -EPROBE_DEFER; |
| 2518 | goto smem_alloc_fail; |
| 2519 | } |
| 2520 | if (!einfo->tx_ch_desc) { |
| 2521 | pr_err("%s: smem alloc of ch descriptor failed\n", __func__); |
| 2522 | rc = -ENOMEM; |
| 2523 | goto smem_alloc_fail; |
| 2524 | } |
| 2525 | einfo->rx_ch_desc = einfo->tx_ch_desc + 1; |
| 2526 | |
| 2527 | einfo->tx_fifo_size = SZ_16K; |
| 2528 | einfo->tx_fifo = smem_alloc(SMEM_GLINK_NATIVE_XPRT_FIFO_0, |
| 2529 | einfo->tx_fifo_size, |
| 2530 | einfo->remote_proc_id, |
Dhoat Harpal | 07eb703 | 2017-04-19 11:46:59 +0530 | [diff] [blame] | 2531 | 0); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2532 | if (!einfo->tx_fifo) { |
| 2533 | pr_err("%s: smem alloc of tx fifo failed\n", __func__); |
| 2534 | rc = -ENOMEM; |
| 2535 | goto smem_alloc_fail; |
| 2536 | } |
| 2537 | |
| 2538 | key = "qcom,qos-config"; |
| 2539 | phandle_node = of_parse_phandle(node, key, 0); |
| 2540 | if (phandle_node && !(of_get_glink_core_qos_cfg(phandle_node, |
| 2541 | &einfo->xprt_cfg))) |
| 2542 | parse_qos_dt_params(node, einfo); |
| 2543 | |
| 2544 | rc = glink_core_register_transport(&einfo->xprt_if, &einfo->xprt_cfg); |
| 2545 | if (rc == -EPROBE_DEFER) |
| 2546 | goto reg_xprt_fail; |
| 2547 | if (rc) { |
| 2548 | pr_err("%s: glink core register transport failed: %d\n", |
| 2549 | __func__, rc); |
| 2550 | goto reg_xprt_fail; |
| 2551 | } |
| 2552 | |
| 2553 | einfo->irq_line = irq_line; |
| 2554 | rc = request_irq(irq_line, irq_handler, |
Chris Lew | dc33e3a | 2018-04-04 10:19:32 -0700 | [diff] [blame] | 2555 | IRQF_TRIGGER_RISING | IRQF_SHARED, |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2556 | node->name, einfo); |
| 2557 | if (rc < 0) { |
| 2558 | pr_err("%s: request_irq on %d failed: %d\n", __func__, irq_line, |
| 2559 | rc); |
| 2560 | goto request_irq_fail; |
| 2561 | } |
Dhoat Harpal | e481137 | 2017-12-18 21:05:20 +0530 | [diff] [blame] | 2562 | einfo->in_ssr = true; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2563 | rc = enable_irq_wake(irq_line); |
| 2564 | if (rc < 0) |
| 2565 | pr_err("%s: enable_irq_wake() failed on %d\n", __func__, |
| 2566 | irq_line); |
| 2567 | |
Chris Lew | 490a42a | 2017-10-02 15:20:54 -0700 | [diff] [blame] | 2568 | key = "cpu-affinity"; |
| 2569 | cpu_size = of_property_count_u32_elems(node, key); |
| 2570 | if (cpu_size > 0) { |
| 2571 | cpu_array = kmalloc_array(cpu_size, sizeof(u32), GFP_KERNEL); |
| 2572 | if (!cpu_array) { |
| 2573 | rc = -ENOMEM; |
| 2574 | goto request_irq_fail; |
| 2575 | } |
| 2576 | rc = of_property_read_u32_array(node, key, cpu_array, cpu_size); |
| 2577 | if (!rc) |
| 2578 | glink_set_affinity(einfo, cpu_array, cpu_size); |
| 2579 | kfree(cpu_array); |
| 2580 | } |
| 2581 | |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 2582 | einfo->debug_mask = QCOM_GLINK_DEBUG_ENABLE; |
| 2583 | snprintf(log_name, sizeof(log_name), "%s_%s_xprt", |
| 2584 | einfo->xprt_cfg.edge, einfo->xprt_cfg.name); |
| 2585 | if (einfo->debug_mask & QCOM_GLINK_DEBUG_ENABLE) |
| 2586 | einfo->log_ctx = |
| 2587 | ipc_log_context_create(NUM_LOG_PAGES, log_name, 0); |
| 2588 | if (!einfo->log_ctx) |
| 2589 | GLINK_ERR("%s: unable to create log context for [%s:%s]\n", |
| 2590 | __func__, einfo->xprt_cfg.edge, |
| 2591 | einfo->xprt_cfg.name); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2592 | register_debugfs_info(einfo); |
| 2593 | /* fake an interrupt on this edge to see if the remote side is up */ |
| 2594 | irq_handler(0, einfo); |
| 2595 | return 0; |
| 2596 | |
| 2597 | request_irq_fail: |
| 2598 | glink_core_unregister_transport(&einfo->xprt_if); |
| 2599 | reg_xprt_fail: |
| 2600 | smem_alloc_fail: |
Kyle Yan | 65be4a5 | 2016-10-31 15:05:00 -0700 | [diff] [blame] | 2601 | kthread_flush_worker(&einfo->kworker); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2602 | kthread_stop(einfo->task); |
| 2603 | einfo->task = NULL; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2604 | kthread_fail: |
| 2605 | iounmap(einfo->out_irq_reg); |
| 2606 | ioremap_fail: |
| 2607 | mutex_lock(&probe_lock); |
| 2608 | edge_infos[einfo->remote_proc_id] = NULL; |
| 2609 | mutex_unlock(&probe_lock); |
| 2610 | invalid_key: |
| 2611 | missing_key: |
| 2612 | kfree(einfo); |
| 2613 | edge_info_alloc_fail: |
| 2614 | return rc; |
| 2615 | } |
| 2616 | |
| 2617 | static int glink_rpm_native_probe(struct platform_device *pdev) |
| 2618 | { |
| 2619 | struct device_node *node; |
| 2620 | struct edge_info *einfo; |
| 2621 | int rc; |
| 2622 | char *key; |
| 2623 | const char *subsys_name; |
| 2624 | uint32_t irq_line; |
| 2625 | uint32_t irq_mask; |
| 2626 | struct resource *irq_r; |
| 2627 | struct resource *msgram_r; |
| 2628 | void __iomem *msgram; |
| 2629 | char toc[RPM_TOC_SIZE]; |
| 2630 | uint32_t *tocp; |
| 2631 | uint32_t num_toc_entries; |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 2632 | char log_name[GLINK_NAME_SIZE*2+7] = {0}; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2633 | |
| 2634 | node = pdev->dev.of_node; |
| 2635 | |
| 2636 | einfo = kzalloc(sizeof(*einfo), GFP_KERNEL); |
| 2637 | if (!einfo) { |
| 2638 | rc = -ENOMEM; |
| 2639 | goto edge_info_alloc_fail; |
| 2640 | } |
| 2641 | |
| 2642 | subsys_name = "rpm"; |
| 2643 | |
| 2644 | key = "interrupts"; |
| 2645 | irq_line = irq_of_parse_and_map(node, 0); |
| 2646 | if (!irq_line) { |
| 2647 | pr_err("%s: missing key %s\n", __func__, key); |
| 2648 | rc = -ENODEV; |
| 2649 | goto missing_key; |
| 2650 | } |
| 2651 | |
| 2652 | key = "qcom,irq-mask"; |
| 2653 | rc = of_property_read_u32(node, key, &irq_mask); |
| 2654 | if (rc) { |
| 2655 | pr_err("%s: missing key %s\n", __func__, key); |
| 2656 | rc = -ENODEV; |
| 2657 | goto missing_key; |
| 2658 | } |
| 2659 | |
| 2660 | key = "irq-reg-base"; |
| 2661 | irq_r = platform_get_resource_byname(pdev, IORESOURCE_MEM, key); |
| 2662 | if (!irq_r) { |
| 2663 | pr_err("%s: missing key %s\n", __func__, key); |
| 2664 | rc = -ENODEV; |
| 2665 | goto missing_key; |
| 2666 | } |
| 2667 | |
| 2668 | key = "msgram"; |
| 2669 | msgram_r = platform_get_resource_byname(pdev, IORESOURCE_MEM, key); |
| 2670 | if (!msgram_r) { |
| 2671 | pr_err("%s: missing key %s\n", __func__, key); |
| 2672 | rc = -ENODEV; |
| 2673 | goto missing_key; |
| 2674 | } |
| 2675 | |
| 2676 | if (subsys_name_to_id(subsys_name) == -ENODEV) { |
| 2677 | pr_err("%s: unknown subsystem: %s\n", __func__, subsys_name); |
| 2678 | rc = -ENODEV; |
| 2679 | goto invalid_key; |
| 2680 | } |
| 2681 | einfo->remote_proc_id = subsys_name_to_id(subsys_name); |
| 2682 | |
| 2683 | init_xprt_cfg(einfo, subsys_name); |
| 2684 | init_xprt_if(einfo); |
| 2685 | spin_lock_init(&einfo->write_lock); |
| 2686 | init_waitqueue_head(&einfo->tx_blocked_queue); |
Kyle Yan | 65be4a5 | 2016-10-31 15:05:00 -0700 | [diff] [blame] | 2687 | kthread_init_work(&einfo->kwork, rx_worker); |
| 2688 | kthread_init_worker(&einfo->kworker); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2689 | einfo->intentless = true; |
| 2690 | einfo->read_from_fifo = memcpy32_fromio; |
| 2691 | einfo->write_to_fifo = memcpy32_toio; |
| 2692 | init_srcu_struct(&einfo->use_ref); |
| 2693 | spin_lock_init(&einfo->rx_lock); |
| 2694 | INIT_LIST_HEAD(&einfo->deferred_cmds); |
| 2695 | |
| 2696 | mutex_lock(&probe_lock); |
| 2697 | if (edge_infos[einfo->remote_proc_id]) { |
| 2698 | pr_err("%s: duplicate subsys %s is not valid\n", __func__, |
| 2699 | subsys_name); |
| 2700 | rc = -ENODEV; |
| 2701 | mutex_unlock(&probe_lock); |
| 2702 | goto invalid_key; |
| 2703 | } |
| 2704 | edge_infos[einfo->remote_proc_id] = einfo; |
| 2705 | mutex_unlock(&probe_lock); |
| 2706 | |
| 2707 | einfo->out_irq_mask = irq_mask; |
| 2708 | einfo->out_irq_reg = ioremap_nocache(irq_r->start, |
| 2709 | resource_size(irq_r)); |
| 2710 | if (!einfo->out_irq_reg) { |
| 2711 | pr_err("%s: unable to map irq reg\n", __func__); |
| 2712 | rc = -ENOMEM; |
| 2713 | goto irq_ioremap_fail; |
| 2714 | } |
| 2715 | |
| 2716 | msgram = ioremap_nocache(msgram_r->start, resource_size(msgram_r)); |
| 2717 | if (!msgram) { |
| 2718 | pr_err("%s: unable to map msgram\n", __func__); |
| 2719 | rc = -ENOMEM; |
| 2720 | goto msgram_ioremap_fail; |
| 2721 | } |
| 2722 | |
| 2723 | einfo->task = kthread_run(kthread_worker_fn, &einfo->kworker, |
| 2724 | "smem_native_%s", subsys_name); |
| 2725 | if (IS_ERR(einfo->task)) { |
| 2726 | rc = PTR_ERR(einfo->task); |
| 2727 | pr_err("%s: kthread_run failed %d\n", __func__, rc); |
| 2728 | goto kthread_fail; |
| 2729 | } |
| 2730 | |
| 2731 | memcpy32_fromio(toc, msgram + resource_size(msgram_r) - RPM_TOC_SIZE, |
| 2732 | RPM_TOC_SIZE); |
| 2733 | tocp = (uint32_t *)toc; |
| 2734 | if (*tocp != RPM_TOC_ID) { |
| 2735 | rc = -ENODEV; |
| 2736 | pr_err("%s: TOC id %d is not valid\n", __func__, *tocp); |
| 2737 | goto toc_init_fail; |
| 2738 | } |
| 2739 | ++tocp; |
| 2740 | num_toc_entries = *tocp; |
| 2741 | if (num_toc_entries > RPM_MAX_TOC_ENTRIES) { |
| 2742 | rc = -ENODEV; |
| 2743 | pr_err("%s: %d is too many toc entries\n", __func__, |
| 2744 | num_toc_entries); |
| 2745 | goto toc_init_fail; |
| 2746 | } |
| 2747 | ++tocp; |
| 2748 | |
| 2749 | for (rc = 0; rc < num_toc_entries; ++rc) { |
| 2750 | if (*tocp != RPM_TX_FIFO_ID) { |
| 2751 | tocp += 3; |
| 2752 | continue; |
| 2753 | } |
| 2754 | ++tocp; |
| 2755 | einfo->tx_ch_desc = msgram + *tocp; |
| 2756 | einfo->tx_fifo = einfo->tx_ch_desc + 1; |
| 2757 | if ((uintptr_t)einfo->tx_fifo > |
| 2758 | (uintptr_t)(msgram + resource_size(msgram_r))) { |
| 2759 | pr_err("%s: invalid tx fifo address\n", __func__); |
| 2760 | einfo->tx_fifo = NULL; |
| 2761 | break; |
| 2762 | } |
| 2763 | ++tocp; |
| 2764 | einfo->tx_fifo_size = *tocp; |
| 2765 | if (einfo->tx_fifo_size > resource_size(msgram_r) || |
| 2766 | (uintptr_t)(einfo->tx_fifo + einfo->tx_fifo_size) > |
| 2767 | (uintptr_t)(msgram + resource_size(msgram_r))) { |
| 2768 | pr_err("%s: invalid tx fifo size\n", __func__); |
| 2769 | einfo->tx_fifo = NULL; |
| 2770 | break; |
| 2771 | } |
| 2772 | break; |
| 2773 | } |
| 2774 | if (!einfo->tx_fifo) { |
| 2775 | rc = -ENODEV; |
| 2776 | pr_err("%s: tx fifo not found\n", __func__); |
| 2777 | goto toc_init_fail; |
| 2778 | } |
| 2779 | |
| 2780 | tocp = (uint32_t *)toc; |
| 2781 | tocp += 2; |
| 2782 | for (rc = 0; rc < num_toc_entries; ++rc) { |
| 2783 | if (*tocp != RPM_RX_FIFO_ID) { |
| 2784 | tocp += 3; |
| 2785 | continue; |
| 2786 | } |
| 2787 | ++tocp; |
| 2788 | einfo->rx_ch_desc = msgram + *tocp; |
| 2789 | einfo->rx_fifo = einfo->rx_ch_desc + 1; |
| 2790 | if ((uintptr_t)einfo->rx_fifo > |
| 2791 | (uintptr_t)(msgram + resource_size(msgram_r))) { |
| 2792 | pr_err("%s: invalid rx fifo address\n", __func__); |
| 2793 | einfo->rx_fifo = NULL; |
| 2794 | break; |
| 2795 | } |
| 2796 | ++tocp; |
| 2797 | einfo->rx_fifo_size = *tocp; |
| 2798 | if (einfo->rx_fifo_size > resource_size(msgram_r) || |
| 2799 | (uintptr_t)(einfo->rx_fifo + einfo->rx_fifo_size) > |
| 2800 | (uintptr_t)(msgram + resource_size(msgram_r))) { |
| 2801 | pr_err("%s: invalid rx fifo size\n", __func__); |
| 2802 | einfo->rx_fifo = NULL; |
| 2803 | break; |
| 2804 | } |
| 2805 | break; |
| 2806 | } |
| 2807 | if (!einfo->rx_fifo) { |
| 2808 | rc = -ENODEV; |
| 2809 | pr_err("%s: rx fifo not found\n", __func__); |
| 2810 | goto toc_init_fail; |
| 2811 | } |
| 2812 | |
| 2813 | einfo->tx_ch_desc->write_index = 0; |
| 2814 | einfo->rx_ch_desc->read_index = 0; |
| 2815 | |
| 2816 | rc = glink_core_register_transport(&einfo->xprt_if, &einfo->xprt_cfg); |
| 2817 | if (rc == -EPROBE_DEFER) |
| 2818 | goto reg_xprt_fail; |
| 2819 | if (rc) { |
| 2820 | pr_err("%s: glink core register transport failed: %d\n", |
| 2821 | __func__, rc); |
| 2822 | goto reg_xprt_fail; |
| 2823 | } |
| 2824 | |
| 2825 | einfo->irq_line = irq_line; |
| 2826 | rc = request_irq(irq_line, irq_handler, |
| 2827 | IRQF_TRIGGER_RISING | IRQF_NO_SUSPEND | IRQF_SHARED, |
| 2828 | node->name, einfo); |
| 2829 | if (rc < 0) { |
| 2830 | pr_err("%s: request_irq on %d failed: %d\n", __func__, irq_line, |
| 2831 | rc); |
| 2832 | goto request_irq_fail; |
| 2833 | } |
| 2834 | rc = enable_irq_wake(irq_line); |
| 2835 | if (rc < 0) |
| 2836 | pr_err("%s: enable_irq_wake() failed on %d\n", __func__, |
| 2837 | irq_line); |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 2838 | einfo->debug_mask = QCOM_GLINK_DEBUG_DISABLE; |
| 2839 | snprintf(log_name, sizeof(log_name), "%s_%s_xprt", |
| 2840 | einfo->xprt_cfg.edge, einfo->xprt_cfg.name); |
| 2841 | if (einfo->debug_mask & QCOM_GLINK_DEBUG_ENABLE) |
| 2842 | einfo->log_ctx = |
| 2843 | ipc_log_context_create(NUM_LOG_PAGES, log_name, 0); |
| 2844 | if (!einfo->log_ctx) |
| 2845 | GLINK_ERR("%s: unable to create log context for [%s:%s]\n", |
| 2846 | __func__, einfo->xprt_cfg.edge, |
| 2847 | einfo->xprt_cfg.name); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2848 | register_debugfs_info(einfo); |
| 2849 | einfo->xprt_if.glink_core_if_ptr->link_up(&einfo->xprt_if); |
| 2850 | return 0; |
| 2851 | |
| 2852 | request_irq_fail: |
| 2853 | glink_core_unregister_transport(&einfo->xprt_if); |
| 2854 | reg_xprt_fail: |
| 2855 | toc_init_fail: |
Kyle Yan | 65be4a5 | 2016-10-31 15:05:00 -0700 | [diff] [blame] | 2856 | kthread_flush_worker(&einfo->kworker); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2857 | kthread_stop(einfo->task); |
| 2858 | einfo->task = NULL; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2859 | kthread_fail: |
| 2860 | iounmap(msgram); |
| 2861 | msgram_ioremap_fail: |
| 2862 | iounmap(einfo->out_irq_reg); |
| 2863 | irq_ioremap_fail: |
| 2864 | mutex_lock(&probe_lock); |
| 2865 | edge_infos[einfo->remote_proc_id] = NULL; |
| 2866 | mutex_unlock(&probe_lock); |
| 2867 | invalid_key: |
| 2868 | missing_key: |
| 2869 | kfree(einfo); |
| 2870 | edge_info_alloc_fail: |
| 2871 | return rc; |
| 2872 | } |
| 2873 | |
| 2874 | static int glink_mailbox_probe(struct platform_device *pdev) |
| 2875 | { |
| 2876 | struct device_node *node; |
| 2877 | struct edge_info *einfo; |
| 2878 | int rc; |
| 2879 | char *key; |
| 2880 | const char *subsys_name; |
| 2881 | uint32_t irq_line; |
| 2882 | uint32_t irq_mask; |
| 2883 | struct resource *irq_r; |
| 2884 | struct resource *mbox_loc_r; |
| 2885 | struct resource *mbox_size_r; |
| 2886 | struct resource *rx_reset_r; |
| 2887 | void *mbox_loc; |
| 2888 | void *mbox_size; |
| 2889 | struct mailbox_config_info *mbox_cfg; |
| 2890 | uint32_t mbox_cfg_size; |
| 2891 | phys_addr_t cfg_p_addr; |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 2892 | char log_name[GLINK_NAME_SIZE*2+7] = {0}; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2893 | |
| 2894 | node = pdev->dev.of_node; |
| 2895 | |
| 2896 | einfo = kzalloc(sizeof(*einfo), GFP_KERNEL); |
| 2897 | if (!einfo) { |
| 2898 | rc = -ENOMEM; |
| 2899 | goto edge_info_alloc_fail; |
| 2900 | } |
| 2901 | |
| 2902 | key = "label"; |
| 2903 | subsys_name = of_get_property(node, key, NULL); |
| 2904 | if (!subsys_name) { |
| 2905 | pr_err("%s: missing key %s\n", __func__, key); |
| 2906 | rc = -ENODEV; |
| 2907 | goto missing_key; |
| 2908 | } |
| 2909 | |
| 2910 | key = "interrupts"; |
| 2911 | irq_line = irq_of_parse_and_map(node, 0); |
| 2912 | if (!irq_line) { |
| 2913 | pr_err("%s: missing key %s\n", __func__, key); |
| 2914 | rc = -ENODEV; |
| 2915 | goto missing_key; |
| 2916 | } |
| 2917 | |
| 2918 | key = "qcom,irq-mask"; |
| 2919 | rc = of_property_read_u32(node, key, &irq_mask); |
| 2920 | if (rc) { |
| 2921 | pr_err("%s: missing key %s\n", __func__, key); |
| 2922 | rc = -ENODEV; |
| 2923 | goto missing_key; |
| 2924 | } |
| 2925 | |
| 2926 | key = "irq-reg-base"; |
| 2927 | irq_r = platform_get_resource_byname(pdev, IORESOURCE_MEM, key); |
| 2928 | if (!irq_r) { |
| 2929 | pr_err("%s: missing key %s\n", __func__, key); |
| 2930 | rc = -ENODEV; |
| 2931 | goto missing_key; |
| 2932 | } |
| 2933 | |
| 2934 | key = "mbox-loc-addr"; |
| 2935 | mbox_loc_r = platform_get_resource_byname(pdev, IORESOURCE_MEM, key); |
| 2936 | if (!mbox_loc_r) { |
| 2937 | pr_err("%s: missing key %s\n", __func__, key); |
| 2938 | rc = -ENODEV; |
| 2939 | goto missing_key; |
| 2940 | } |
| 2941 | |
| 2942 | key = "mbox-loc-size"; |
| 2943 | mbox_size_r = platform_get_resource_byname(pdev, IORESOURCE_MEM, key); |
| 2944 | if (!mbox_size_r) { |
| 2945 | pr_err("%s: missing key %s\n", __func__, key); |
| 2946 | rc = -ENODEV; |
| 2947 | goto missing_key; |
| 2948 | } |
| 2949 | |
| 2950 | key = "irq-rx-reset"; |
| 2951 | rx_reset_r = platform_get_resource_byname(pdev, IORESOURCE_MEM, key); |
| 2952 | if (!rx_reset_r) { |
| 2953 | pr_err("%s: missing key %s\n", __func__, key); |
| 2954 | rc = -ENODEV; |
| 2955 | goto missing_key; |
| 2956 | } |
| 2957 | |
| 2958 | key = "qcom,tx-ring-size"; |
| 2959 | rc = of_property_read_u32(node, key, &einfo->tx_fifo_size); |
| 2960 | if (rc) { |
| 2961 | pr_err("%s: missing key %s\n", __func__, key); |
| 2962 | rc = -ENODEV; |
| 2963 | goto missing_key; |
| 2964 | } |
| 2965 | |
| 2966 | key = "qcom,rx-ring-size"; |
| 2967 | rc = of_property_read_u32(node, key, &einfo->rx_fifo_size); |
| 2968 | if (rc) { |
| 2969 | pr_err("%s: missing key %s\n", __func__, key); |
| 2970 | rc = -ENODEV; |
| 2971 | goto missing_key; |
| 2972 | } |
| 2973 | |
| 2974 | if (subsys_name_to_id(subsys_name) == -ENODEV) { |
| 2975 | pr_err("%s: unknown subsystem: %s\n", __func__, subsys_name); |
| 2976 | rc = -ENODEV; |
| 2977 | goto invalid_key; |
| 2978 | } |
| 2979 | einfo->remote_proc_id = subsys_name_to_id(subsys_name); |
| 2980 | |
| 2981 | init_xprt_cfg(einfo, subsys_name); |
| 2982 | einfo->xprt_cfg.name = "mailbox"; |
| 2983 | init_xprt_if(einfo); |
| 2984 | spin_lock_init(&einfo->write_lock); |
| 2985 | init_waitqueue_head(&einfo->tx_blocked_queue); |
Kyle Yan | 65be4a5 | 2016-10-31 15:05:00 -0700 | [diff] [blame] | 2986 | kthread_init_work(&einfo->kwork, rx_worker); |
| 2987 | kthread_init_worker(&einfo->kworker); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2988 | einfo->read_from_fifo = read_from_fifo; |
| 2989 | einfo->write_to_fifo = write_to_fifo; |
| 2990 | init_srcu_struct(&einfo->use_ref); |
| 2991 | spin_lock_init(&einfo->rx_lock); |
| 2992 | INIT_LIST_HEAD(&einfo->deferred_cmds); |
| 2993 | |
| 2994 | mutex_lock(&probe_lock); |
| 2995 | if (edge_infos[einfo->remote_proc_id]) { |
| 2996 | pr_err("%s: duplicate subsys %s is not valid\n", __func__, |
| 2997 | subsys_name); |
| 2998 | rc = -ENODEV; |
| 2999 | mutex_unlock(&probe_lock); |
| 3000 | goto invalid_key; |
| 3001 | } |
| 3002 | edge_infos[einfo->remote_proc_id] = einfo; |
| 3003 | mutex_unlock(&probe_lock); |
| 3004 | |
| 3005 | einfo->out_irq_mask = irq_mask; |
| 3006 | einfo->out_irq_reg = ioremap_nocache(irq_r->start, |
| 3007 | resource_size(irq_r)); |
| 3008 | if (!einfo->out_irq_reg) { |
| 3009 | pr_err("%s: unable to map irq reg\n", __func__); |
| 3010 | rc = -ENOMEM; |
| 3011 | goto irq_ioremap_fail; |
| 3012 | } |
| 3013 | |
| 3014 | mbox_loc = ioremap_nocache(mbox_loc_r->start, |
| 3015 | resource_size(mbox_loc_r)); |
| 3016 | if (!mbox_loc) { |
| 3017 | pr_err("%s: unable to map mailbox location reg\n", __func__); |
| 3018 | rc = -ENOMEM; |
| 3019 | goto mbox_loc_ioremap_fail; |
| 3020 | } |
| 3021 | |
| 3022 | mbox_size = ioremap_nocache(mbox_size_r->start, |
| 3023 | resource_size(mbox_size_r)); |
| 3024 | if (!mbox_size) { |
| 3025 | pr_err("%s: unable to map mailbox size reg\n", __func__); |
| 3026 | rc = -ENOMEM; |
| 3027 | goto mbox_size_ioremap_fail; |
| 3028 | } |
| 3029 | |
| 3030 | einfo->rx_reset_reg = ioremap_nocache(rx_reset_r->start, |
| 3031 | resource_size(rx_reset_r)); |
| 3032 | if (!einfo->rx_reset_reg) { |
| 3033 | pr_err("%s: unable to map rx reset reg\n", __func__); |
| 3034 | rc = -ENOMEM; |
| 3035 | goto rx_reset_ioremap_fail; |
| 3036 | } |
| 3037 | |
| 3038 | einfo->task = kthread_run(kthread_worker_fn, &einfo->kworker, |
| 3039 | "smem_native_%s", subsys_name); |
| 3040 | if (IS_ERR(einfo->task)) { |
| 3041 | rc = PTR_ERR(einfo->task); |
| 3042 | pr_err("%s: kthread_run failed %d\n", __func__, rc); |
| 3043 | goto kthread_fail; |
| 3044 | } |
| 3045 | |
| 3046 | mbox_cfg_size = sizeof(*mbox_cfg) + einfo->tx_fifo_size + |
| 3047 | einfo->rx_fifo_size; |
| 3048 | mbox_cfg = smem_alloc(SMEM_GLINK_NATIVE_XPRT_DESCRIPTOR, |
| 3049 | mbox_cfg_size, |
| 3050 | einfo->remote_proc_id, |
| 3051 | 0); |
| 3052 | if (PTR_ERR(mbox_cfg) == -EPROBE_DEFER) { |
| 3053 | rc = -EPROBE_DEFER; |
| 3054 | goto smem_alloc_fail; |
| 3055 | } |
| 3056 | if (!mbox_cfg) { |
| 3057 | pr_err("%s: smem alloc of mailbox struct failed\n", __func__); |
| 3058 | rc = -ENOMEM; |
| 3059 | goto smem_alloc_fail; |
| 3060 | } |
| 3061 | einfo->mailbox = mbox_cfg; |
| 3062 | einfo->tx_ch_desc = (struct channel_desc *)(&mbox_cfg->tx_read_index); |
| 3063 | einfo->rx_ch_desc = (struct channel_desc *)(&mbox_cfg->rx_read_index); |
| 3064 | mbox_cfg->tx_size = einfo->tx_fifo_size; |
| 3065 | mbox_cfg->rx_size = einfo->rx_fifo_size; |
| 3066 | einfo->tx_fifo = &mbox_cfg->fifo[0]; |
| 3067 | |
| 3068 | rc = glink_core_register_transport(&einfo->xprt_if, &einfo->xprt_cfg); |
| 3069 | if (rc == -EPROBE_DEFER) |
| 3070 | goto reg_xprt_fail; |
| 3071 | if (rc) { |
| 3072 | pr_err("%s: glink core register transport failed: %d\n", |
| 3073 | __func__, rc); |
| 3074 | goto reg_xprt_fail; |
| 3075 | } |
| 3076 | |
| 3077 | einfo->irq_line = irq_line; |
| 3078 | rc = request_irq(irq_line, irq_handler, |
| 3079 | IRQF_TRIGGER_HIGH | IRQF_NO_SUSPEND | IRQF_SHARED, |
| 3080 | node->name, einfo); |
| 3081 | if (rc < 0) { |
| 3082 | pr_err("%s: request_irq on %d failed: %d\n", __func__, irq_line, |
| 3083 | rc); |
| 3084 | goto request_irq_fail; |
| 3085 | } |
| 3086 | rc = enable_irq_wake(irq_line); |
| 3087 | if (rc < 0) |
| 3088 | pr_err("%s: enable_irq_wake() failed on %d\n", __func__, |
| 3089 | irq_line); |
Dhoat Harpal | 4a05281 | 2017-10-06 22:14:10 +0530 | [diff] [blame] | 3090 | einfo->debug_mask = QCOM_GLINK_DEBUG_DISABLE; |
| 3091 | snprintf(log_name, sizeof(log_name), "%s_%s_xprt", |
| 3092 | einfo->xprt_cfg.edge, einfo->xprt_cfg.name); |
| 3093 | if (einfo->debug_mask & QCOM_GLINK_DEBUG_ENABLE) |
| 3094 | einfo->log_ctx = |
| 3095 | ipc_log_context_create(NUM_LOG_PAGES, log_name, 0); |
| 3096 | if (!einfo->log_ctx) |
| 3097 | GLINK_ERR("%s: unable to create log context for [%s:%s]\n", |
| 3098 | __func__, einfo->xprt_cfg.edge, |
| 3099 | einfo->xprt_cfg.name); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 3100 | register_debugfs_info(einfo); |
| 3101 | |
| 3102 | writel_relaxed(mbox_cfg_size, mbox_size); |
| 3103 | cfg_p_addr = smem_virt_to_phys(mbox_cfg); |
| 3104 | writel_relaxed(lower_32_bits(cfg_p_addr), mbox_loc); |
| 3105 | writel_relaxed(upper_32_bits(cfg_p_addr), mbox_loc + 4); |
Dhoat Harpal | e481137 | 2017-12-18 21:05:20 +0530 | [diff] [blame] | 3106 | einfo->in_ssr = true; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 3107 | send_irq(einfo); |
| 3108 | iounmap(mbox_size); |
| 3109 | iounmap(mbox_loc); |
| 3110 | return 0; |
| 3111 | |
| 3112 | request_irq_fail: |
| 3113 | glink_core_unregister_transport(&einfo->xprt_if); |
| 3114 | reg_xprt_fail: |
| 3115 | smem_alloc_fail: |
Kyle Yan | 65be4a5 | 2016-10-31 15:05:00 -0700 | [diff] [blame] | 3116 | kthread_flush_worker(&einfo->kworker); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 3117 | kthread_stop(einfo->task); |
| 3118 | einfo->task = NULL; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 3119 | kthread_fail: |
| 3120 | iounmap(einfo->rx_reset_reg); |
| 3121 | rx_reset_ioremap_fail: |
| 3122 | iounmap(mbox_size); |
| 3123 | mbox_size_ioremap_fail: |
| 3124 | iounmap(mbox_loc); |
| 3125 | mbox_loc_ioremap_fail: |
| 3126 | iounmap(einfo->out_irq_reg); |
| 3127 | irq_ioremap_fail: |
| 3128 | mutex_lock(&probe_lock); |
| 3129 | edge_infos[einfo->remote_proc_id] = NULL; |
| 3130 | mutex_unlock(&probe_lock); |
| 3131 | invalid_key: |
| 3132 | missing_key: |
| 3133 | kfree(einfo); |
| 3134 | edge_info_alloc_fail: |
| 3135 | return rc; |
| 3136 | } |
| 3137 | |
| 3138 | #if defined(CONFIG_DEBUG_FS) |
| 3139 | /** |
| 3140 | * debug_edge() - generates formatted text output displaying current edge state |
| 3141 | * @s: File to send the output to. |
| 3142 | */ |
| 3143 | static void debug_edge(struct seq_file *s) |
| 3144 | { |
| 3145 | struct edge_info *einfo; |
| 3146 | struct glink_dbgfs_data *dfs_d; |
| 3147 | |
| 3148 | dfs_d = s->private; |
| 3149 | einfo = dfs_d->priv_data; |
| 3150 | |
| 3151 | /* |
| 3152 | * formatted, human readable edge state output, ie: |
| 3153 | * TX/RX fifo information: |
| 3154 | ID|EDGE |TX READ |TX WRITE |TX SIZE |RX READ |RX WRITE |RX SIZE |
| 3155 | ------------------------------------------------------------------------------- |
| 3156 | 01|mpss |0x00000128|0x00000128|0x00000800|0x00000256|0x00000256|0x00001000 |
| 3157 | * |
| 3158 | * Interrupt information: |
| 3159 | * EDGE |TX INT |RX INT |
| 3160 | * -------------------------------- |
| 3161 | * mpss |0x00000006|0x00000008 |
| 3162 | */ |
| 3163 | seq_puts(s, "TX/RX fifo information:\n"); |
| 3164 | seq_printf(s, "%2s|%-10s|%-10s|%-10s|%-10s|%-10s|%-10s|%-10s\n", |
| 3165 | "ID", |
| 3166 | "EDGE", |
| 3167 | "TX READ", |
| 3168 | "TX WRITE", |
| 3169 | "TX SIZE", |
| 3170 | "RX READ", |
| 3171 | "RX WRITE", |
| 3172 | "RX SIZE"); |
| 3173 | seq_puts(s, |
| 3174 | "-------------------------------------------------------------------------------\n"); |
| 3175 | if (!einfo) |
| 3176 | return; |
| 3177 | |
| 3178 | seq_printf(s, "%02i|%-10s|", einfo->remote_proc_id, |
| 3179 | einfo->xprt_cfg.edge); |
| 3180 | if (!einfo->rx_fifo) |
| 3181 | seq_puts(s, "Link Not Up\n"); |
| 3182 | else |
| 3183 | seq_printf(s, "0x%08X|0x%08X|0x%08X|0x%08X|0x%08X|0x%08X\n", |
| 3184 | einfo->tx_ch_desc->read_index, |
| 3185 | einfo->tx_ch_desc->write_index, |
| 3186 | einfo->tx_fifo_size, |
| 3187 | einfo->rx_ch_desc->read_index, |
| 3188 | einfo->rx_ch_desc->write_index, |
| 3189 | einfo->rx_fifo_size); |
| 3190 | |
| 3191 | seq_puts(s, "\nInterrupt information:\n"); |
| 3192 | seq_printf(s, "%-10s|%-10s|%-10s\n", "EDGE", "TX INT", "RX INT"); |
| 3193 | seq_puts(s, "--------------------------------\n"); |
| 3194 | seq_printf(s, "%-10s|0x%08X|0x%08X\n", einfo->xprt_cfg.edge, |
| 3195 | einfo->tx_irq_count, |
| 3196 | einfo->rx_irq_count); |
| 3197 | } |
| 3198 | |
| 3199 | /** |
| 3200 | * register_debugfs_info() - initialize debugfs device entries |
| 3201 | * @einfo: Pointer to specific edge_info for which register is called. |
| 3202 | */ |
| 3203 | static void register_debugfs_info(struct edge_info *einfo) |
| 3204 | { |
| 3205 | struct glink_dbgfs dfs; |
| 3206 | char *curr_dir_name; |
| 3207 | int dir_name_len; |
| 3208 | |
| 3209 | dir_name_len = strlen(einfo->xprt_cfg.edge) + |
| 3210 | strlen(einfo->xprt_cfg.name) + 2; |
| 3211 | curr_dir_name = kmalloc(dir_name_len, GFP_KERNEL); |
| 3212 | if (!curr_dir_name) { |
| 3213 | GLINK_ERR("%s: Memory allocation failed\n", __func__); |
| 3214 | return; |
| 3215 | } |
| 3216 | |
| 3217 | snprintf(curr_dir_name, dir_name_len, "%s_%s", |
| 3218 | einfo->xprt_cfg.edge, einfo->xprt_cfg.name); |
| 3219 | dfs.curr_name = curr_dir_name; |
| 3220 | dfs.par_name = "xprt"; |
| 3221 | dfs.b_dir_create = false; |
| 3222 | glink_debugfs_create("XPRT_INFO", debug_edge, |
| 3223 | &dfs, einfo, false); |
| 3224 | kfree(curr_dir_name); |
| 3225 | } |
| 3226 | |
| 3227 | #else |
| 3228 | static void register_debugfs_info(struct edge_info *einfo) |
| 3229 | { |
| 3230 | } |
| 3231 | #endif /* CONFIG_DEBUG_FS */ |
| 3232 | |
| 3233 | static const struct of_device_id smem_match_table[] = { |
| 3234 | { .compatible = "qcom,glink-smem-native-xprt" }, |
| 3235 | {}, |
| 3236 | }; |
| 3237 | |
| 3238 | static struct platform_driver glink_smem_native_driver = { |
| 3239 | .probe = glink_smem_native_probe, |
| 3240 | .driver = { |
| 3241 | .name = "msm_glink_smem_native_xprt", |
| 3242 | .owner = THIS_MODULE, |
| 3243 | .of_match_table = smem_match_table, |
| 3244 | }, |
| 3245 | }; |
| 3246 | |
| 3247 | static const struct of_device_id rpm_match_table[] = { |
| 3248 | { .compatible = "qcom,glink-rpm-native-xprt" }, |
| 3249 | {}, |
| 3250 | }; |
| 3251 | |
| 3252 | static struct platform_driver glink_rpm_native_driver = { |
| 3253 | .probe = glink_rpm_native_probe, |
| 3254 | .driver = { |
| 3255 | .name = "msm_glink_rpm_native_xprt", |
| 3256 | .owner = THIS_MODULE, |
| 3257 | .of_match_table = rpm_match_table, |
| 3258 | }, |
| 3259 | }; |
| 3260 | |
| 3261 | static const struct of_device_id mailbox_match_table[] = { |
| 3262 | { .compatible = "qcom,glink-mailbox-xprt" }, |
| 3263 | {}, |
| 3264 | }; |
| 3265 | |
| 3266 | static struct platform_driver glink_mailbox_driver = { |
| 3267 | .probe = glink_mailbox_probe, |
| 3268 | .driver = { |
| 3269 | .name = "msm_glink_mailbox_xprt", |
| 3270 | .owner = THIS_MODULE, |
| 3271 | .of_match_table = mailbox_match_table, |
| 3272 | }, |
| 3273 | }; |
| 3274 | |
| 3275 | static int __init glink_smem_native_xprt_init(void) |
| 3276 | { |
| 3277 | int rc; |
| 3278 | |
| 3279 | rc = platform_driver_register(&glink_smem_native_driver); |
| 3280 | if (rc) { |
| 3281 | pr_err("%s: glink_smem_native_driver register failed %d\n", |
| 3282 | __func__, rc); |
| 3283 | return rc; |
| 3284 | } |
| 3285 | |
| 3286 | rc = platform_driver_register(&glink_rpm_native_driver); |
| 3287 | if (rc) { |
| 3288 | pr_err("%s: glink_rpm_native_driver register failed %d\n", |
| 3289 | __func__, rc); |
| 3290 | return rc; |
| 3291 | } |
| 3292 | |
| 3293 | rc = platform_driver_register(&glink_mailbox_driver); |
| 3294 | if (rc) { |
| 3295 | pr_err("%s: glink_mailbox_driver register failed %d\n", |
| 3296 | __func__, rc); |
| 3297 | return rc; |
| 3298 | } |
| 3299 | |
| 3300 | return 0; |
| 3301 | } |
| 3302 | arch_initcall(glink_smem_native_xprt_init); |
| 3303 | |
| 3304 | MODULE_DESCRIPTION("MSM G-Link SMEM Native Transport"); |
| 3305 | MODULE_LICENSE("GPL v2"); |