1/* 2 * sst_ipc.c - Intel SST Driver for audio engine 3 * 4 * Copyright (C) 2008-14 Intel Corporation 5 * Authors: Vinod Koul <vinod.koul@intel.com> 6 * Harsha Priya <priya.harsha@intel.com> 7 * Dharageswari R <dharageswari.r@intel.com> 8 * KP Jeeja <jeeja.kp@intel.com> 9 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; version 2 of the License. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 21 */ 22#include <linux/pci.h> 23#include <linux/firmware.h> 24#include <linux/sched.h> 25#include <linux/delay.h> 26#include <linux/pm_runtime.h> 27#include <sound/core.h> 28#include <sound/pcm.h> 29#include <sound/soc.h> 30#include <sound/compress_driver.h> 31#include <asm/intel-mid.h> 32#include <asm/platform_sst_audio.h> 33#include "../sst-mfld-platform.h" 34#include "sst.h" 35#include "../../common/sst-dsp.h" 36 37struct sst_block *sst_create_block(struct intel_sst_drv *ctx, 38 u32 msg_id, u32 drv_id) 39{ 40 struct sst_block *msg = NULL; 41 42 dev_dbg(ctx->dev, "Enter\n"); 43 msg = kzalloc(sizeof(*msg), GFP_KERNEL); 44 if (!msg) 45 return NULL; 46 msg->condition = false; 47 msg->on = true; 48 msg->msg_id = msg_id; 49 msg->drv_id = drv_id; 50 spin_lock_bh(&ctx->block_lock); 51 list_add_tail(&msg->node, &ctx->block_list); 52 spin_unlock_bh(&ctx->block_lock); 53 54 return msg; 55} 56 57/* 58 * while handling the interrupts, we need to check for message status and 59 * then if we are blocking for a message 60 * 61 * here we are unblocking the blocked ones, this is based on id we have 62 * passed and search that for block threads. 63 * We will not find block in two cases 64 * a) when its small message and block in not there, so silently ignore 65 * them 66 * b) when we are actually not able to find the block (bug perhaps) 67 * 68 * Since we have bit of small messages we can spam kernel log with err 69 * print on above so need to keep as debug prints which should be enabled 70 * via dynamic debug while debugging IPC issues 71 */ 72int sst_wake_up_block(struct intel_sst_drv *ctx, int result, 73 u32 drv_id, u32 ipc, void *data, u32 size) 74{ 75 struct sst_block *block = NULL; 76 77 dev_dbg(ctx->dev, "Enter\n"); 78 79 spin_lock_bh(&ctx->block_lock); 80 list_for_each_entry(block, &ctx->block_list, node) { 81 dev_dbg(ctx->dev, "Block ipc %d, drv_id %d\n", block->msg_id, 82 block->drv_id); 83 if (block->msg_id == ipc && block->drv_id == drv_id) { 84 dev_dbg(ctx->dev, "free up the block\n"); 85 block->ret_code = result; 86 block->data = data; 87 block->size = size; 88 block->condition = true; 89 spin_unlock_bh(&ctx->block_lock); 90 wake_up(&ctx->wait_queue); 91 return 0; 92 } 93 } 94 spin_unlock_bh(&ctx->block_lock); 95 dev_dbg(ctx->dev, 96 "Block not found or a response received for a short msg for ipc %d, drv_id %d\n", 97 ipc, drv_id); 98 return -EINVAL; 99} 100 101int sst_free_block(struct intel_sst_drv *ctx, struct sst_block *freed) 102{ 103 struct sst_block *block = NULL, *__block; 104 105 dev_dbg(ctx->dev, "Enter\n"); 106 spin_lock_bh(&ctx->block_lock); 107 list_for_each_entry_safe(block, __block, &ctx->block_list, node) { 108 if (block == freed) { 109 pr_debug("pvt_id freed --> %d\n", freed->drv_id); 110 /* toggle the index position of pvt_id */ 111 list_del(&freed->node); 112 spin_unlock_bh(&ctx->block_lock); 113 kfree(freed->data); 114 freed->data = NULL; 115 kfree(freed); 116 return 0; 117 } 118 } 119 spin_unlock_bh(&ctx->block_lock); 120 dev_err(ctx->dev, "block is already freed!!!\n"); 121 return -EINVAL; 122} 123 124int sst_post_message_mrfld(struct intel_sst_drv *sst_drv_ctx, 125 struct ipc_post *ipc_msg, bool sync) 126{ 127 struct ipc_post *msg = ipc_msg; 128 union ipc_header_mrfld header; 129 unsigned int loop_count = 0; 130 int retval = 0; 131 unsigned long irq_flags; 132 133 dev_dbg(sst_drv_ctx->dev, "Enter: sync: %d\n", sync); 134 spin_lock_irqsave(&sst_drv_ctx->ipc_spin_lock, irq_flags); 135 header.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCX); 136 if (sync) { 137 while (header.p.header_high.part.busy) { 138 if (loop_count > 25) { 139 dev_err(sst_drv_ctx->dev, 140 "sst: Busy wait failed, cant send this msg\n"); 141 retval = -EBUSY; 142 goto out; 143 } 144 cpu_relax(); 145 loop_count++; 146 header.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCX); 147 } 148 } else { 149 if (list_empty(&sst_drv_ctx->ipc_dispatch_list)) { 150 /* queue is empty, nothing to send */ 151 spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags); 152 dev_dbg(sst_drv_ctx->dev, 153 "Empty msg queue... NO Action\n"); 154 return 0; 155 } 156 157 if (header.p.header_high.part.busy) { 158 spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags); 159 dev_dbg(sst_drv_ctx->dev, "Busy not free... post later\n"); 160 return 0; 161 } 162 163 /* copy msg from list */ 164 msg = list_entry(sst_drv_ctx->ipc_dispatch_list.next, 165 struct ipc_post, node); 166 list_del(&msg->node); 167 } 168 dev_dbg(sst_drv_ctx->dev, "sst: Post message: header = %x\n", 169 msg->mrfld_header.p.header_high.full); 170 dev_dbg(sst_drv_ctx->dev, "sst: size = 0x%x\n", 171 msg->mrfld_header.p.header_low_payload); 172 173 if (msg->mrfld_header.p.header_high.part.large) 174 memcpy_toio(sst_drv_ctx->mailbox + SST_MAILBOX_SEND, 175 msg->mailbox_data, 176 msg->mrfld_header.p.header_low_payload); 177 178 sst_shim_write64(sst_drv_ctx->shim, SST_IPCX, msg->mrfld_header.full); 179 180out: 181 spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags); 182 kfree(msg->mailbox_data); 183 kfree(msg); 184 return retval; 185} 186 187void intel_sst_clear_intr_mrfld(struct intel_sst_drv *sst_drv_ctx) 188{ 189 union interrupt_reg_mrfld isr; 190 union interrupt_reg_mrfld imr; 191 union ipc_header_mrfld clear_ipc; 192 unsigned long irq_flags; 193 194 spin_lock_irqsave(&sst_drv_ctx->ipc_spin_lock, irq_flags); 195 imr.full = sst_shim_read64(sst_drv_ctx->shim, SST_IMRX); 196 isr.full = sst_shim_read64(sst_drv_ctx->shim, SST_ISRX); 197 198 /* write 1 to clear*/ 199 isr.part.busy_interrupt = 1; 200 sst_shim_write64(sst_drv_ctx->shim, SST_ISRX, isr.full); 201 202 /* Set IA done bit */ 203 clear_ipc.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCD); 204 205 clear_ipc.p.header_high.part.busy = 0; 206 clear_ipc.p.header_high.part.done = 1; 207 clear_ipc.p.header_low_payload = IPC_ACK_SUCCESS; 208 sst_shim_write64(sst_drv_ctx->shim, SST_IPCD, clear_ipc.full); 209 /* un mask busy interrupt */ 210 imr.part.busy_interrupt = 0; 211 sst_shim_write64(sst_drv_ctx->shim, SST_IMRX, imr.full); 212 spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags); 213} 214 215 216/* 217 * process_fw_init - process the FW init msg 218 * 219 * @msg: IPC message mailbox data from FW 220 * 221 * This function processes the FW init msg from FW 222 * marks FW state and prints debug info of loaded FW 223 */ 224static void process_fw_init(struct intel_sst_drv *sst_drv_ctx, 225 void *msg) 226{ 227 struct ipc_header_fw_init *init = 228 (struct ipc_header_fw_init *)msg; 229 int retval = 0; 230 231 dev_dbg(sst_drv_ctx->dev, "*** FW Init msg came***\n"); 232 if (init->result) { 233 sst_set_fw_state_locked(sst_drv_ctx, SST_RESET); 234 dev_err(sst_drv_ctx->dev, "FW Init failed, Error %x\n", 235 init->result); 236 retval = init->result; 237 goto ret; 238 } 239 240ret: 241 sst_wake_up_block(sst_drv_ctx, retval, FW_DWNL_ID, 0 , NULL, 0); 242} 243 244static void process_fw_async_msg(struct intel_sst_drv *sst_drv_ctx, 245 struct ipc_post *msg) 246{ 247 u32 msg_id; 248 int str_id; 249 u32 data_size, i; 250 void *data_offset; 251 struct stream_info *stream; 252 union ipc_header_high msg_high; 253 u32 msg_low, pipe_id; 254 255 msg_high = msg->mrfld_header.p.header_high; 256 msg_low = msg->mrfld_header.p.header_low_payload; 257 msg_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->cmd_id; 258 data_offset = (msg->mailbox_data + sizeof(struct ipc_dsp_hdr)); 259 data_size = msg_low - (sizeof(struct ipc_dsp_hdr)); 260 261 switch (msg_id) { 262 case IPC_SST_PERIOD_ELAPSED_MRFLD: 263 pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id; 264 str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id); 265 if (str_id > 0) { 266 dev_dbg(sst_drv_ctx->dev, 267 "Period elapsed rcvd for pipe id 0x%x\n", 268 pipe_id); 269 stream = &sst_drv_ctx->streams[str_id]; 270 if (stream->period_elapsed) 271 stream->period_elapsed(stream->pcm_substream); 272 if (stream->compr_cb) 273 stream->compr_cb(stream->compr_cb_param); 274 } 275 break; 276 277 case IPC_IA_DRAIN_STREAM_MRFLD: 278 pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id; 279 str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id); 280 if (str_id > 0) { 281 stream = &sst_drv_ctx->streams[str_id]; 282 if (stream->drain_notify) 283 stream->drain_notify(stream->drain_cb_param); 284 } 285 break; 286 287 case IPC_IA_FW_ASYNC_ERR_MRFLD: 288 dev_err(sst_drv_ctx->dev, "FW sent async error msg:\n"); 289 for (i = 0; i < (data_size/4); i++) 290 print_hex_dump(KERN_DEBUG, NULL, DUMP_PREFIX_NONE, 291 16, 4, data_offset, data_size, false); 292 break; 293 294 case IPC_IA_FW_INIT_CMPLT_MRFLD: 295 process_fw_init(sst_drv_ctx, data_offset); 296 break; 297 298 case IPC_IA_BUF_UNDER_RUN_MRFLD: 299 pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id; 300 str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id); 301 if (str_id > 0) 302 dev_err(sst_drv_ctx->dev, 303 "Buffer under-run for pipe:%#x str_id:%d\n", 304 pipe_id, str_id); 305 break; 306 307 default: 308 dev_err(sst_drv_ctx->dev, 309 "Unrecognized async msg from FW msg_id %#x\n", msg_id); 310 } 311} 312 313void sst_process_reply_mrfld(struct intel_sst_drv *sst_drv_ctx, 314 struct ipc_post *msg) 315{ 316 unsigned int drv_id; 317 void *data; 318 union ipc_header_high msg_high; 319 u32 msg_low; 320 struct ipc_dsp_hdr *dsp_hdr; 321 unsigned int cmd_id; 322 323 msg_high = msg->mrfld_header.p.header_high; 324 msg_low = msg->mrfld_header.p.header_low_payload; 325 326 dev_dbg(sst_drv_ctx->dev, "IPC process message header %x payload %x\n", 327 msg->mrfld_header.p.header_high.full, 328 msg->mrfld_header.p.header_low_payload); 329 330 drv_id = msg_high.part.drv_id; 331 332 /* Check for async messages first */ 333 if (drv_id == SST_ASYNC_DRV_ID) { 334 /*FW sent async large message*/ 335 process_fw_async_msg(sst_drv_ctx, msg); 336 return; 337 } 338 339 /* FW sent short error response for an IPC */ 340 if (msg_high.part.result && drv_id && !msg_high.part.large) { 341 /* 32-bit FW error code in msg_low */ 342 dev_err(sst_drv_ctx->dev, "FW sent error response 0x%x", msg_low); 343 sst_wake_up_block(sst_drv_ctx, msg_high.part.result, 344 msg_high.part.drv_id, 345 msg_high.part.msg_id, NULL, 0); 346 return; 347 } 348 349 /* 350 * Process all valid responses 351 * if it is a large message, the payload contains the size to 352 * copy from mailbox 353 **/ 354 if (msg_high.part.large) { 355 data = kzalloc(msg_low, GFP_KERNEL); 356 if (!data) 357 return; 358 memcpy(data, (void *) msg->mailbox_data, msg_low); 359 /* Copy command id so that we can use to put sst to reset */ 360 dsp_hdr = (struct ipc_dsp_hdr *)data; 361 cmd_id = dsp_hdr->cmd_id; 362 dev_dbg(sst_drv_ctx->dev, "cmd_id %d\n", dsp_hdr->cmd_id); 363 if (sst_wake_up_block(sst_drv_ctx, msg_high.part.result, 364 msg_high.part.drv_id, 365 msg_high.part.msg_id, data, msg_low)) 366 kfree(data); 367 } else { 368 sst_wake_up_block(sst_drv_ctx, msg_high.part.result, 369 msg_high.part.drv_id, 370 msg_high.part.msg_id, NULL, 0); 371 } 372 373} 374