Vinod Koul | fffa1cc | 2010-10-05 16:25:17 +0100 | [diff] [blame] | 1 | /* |
| 2 | * intel_sst_pvt.c - Intel SST Driver for audio engine |
| 3 | * |
| 4 | * Copyright (C) 2008-10 Intel Corp |
| 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 | * You should have received a copy of the GNU General Public License along |
| 21 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 22 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 23 | * |
| 24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 25 | * |
| 26 | * This driver exposes the audio engine functionalities to the ALSA |
| 27 | * and middleware. |
| 28 | * |
| 29 | * This file contains all private functions |
| 30 | */ |
| 31 | |
Joe Perches | d0f40c5 | 2010-10-20 18:51:06 -0700 | [diff] [blame] | 32 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 33 | |
Vinod Koul | fffa1cc | 2010-10-05 16:25:17 +0100 | [diff] [blame] | 34 | #include <linux/pci.h> |
| 35 | #include <linux/fs.h> |
| 36 | #include <linux/firmware.h> |
| 37 | #include <linux/sched.h> |
| 38 | #include "intel_sst.h" |
| 39 | #include "intel_sst_ioctl.h" |
| 40 | #include "intel_sst_fw_ipc.h" |
| 41 | #include "intel_sst_common.h" |
| 42 | |
| 43 | /* |
| 44 | * sst_get_block_stream - get a new block stream |
| 45 | * |
| 46 | * @sst_drv_ctx: Driver context structure |
| 47 | * |
| 48 | * This function assigns a block for the calls that dont have stream context yet |
| 49 | * the blocks are used for waiting on Firmware's response for any operation |
| 50 | * Should be called with stream lock held |
| 51 | */ |
| 52 | int sst_get_block_stream(struct intel_sst_drv *sst_drv_ctx) |
| 53 | { |
| 54 | int i; |
| 55 | |
| 56 | for (i = 0; i < MAX_ACTIVE_STREAM; i++) { |
| 57 | if (sst_drv_ctx->alloc_block[i].sst_id == BLOCK_UNINIT) { |
| 58 | sst_drv_ctx->alloc_block[i].ops_block.condition = false; |
| 59 | sst_drv_ctx->alloc_block[i].ops_block.ret_code = 0; |
| 60 | sst_drv_ctx->alloc_block[i].sst_id = 0; |
| 61 | break; |
| 62 | } |
| 63 | } |
| 64 | if (i == MAX_ACTIVE_STREAM) { |
Joe Perches | d0f40c5 | 2010-10-20 18:51:06 -0700 | [diff] [blame] | 65 | pr_err("max alloc_stream reached\n"); |
Vinod Koul | fffa1cc | 2010-10-05 16:25:17 +0100 | [diff] [blame] | 66 | i = -EBUSY; /* active stream limit reached */ |
| 67 | } |
| 68 | return i; |
| 69 | } |
| 70 | |
| 71 | /* |
| 72 | * sst_wait_interruptible - wait on event |
| 73 | * |
| 74 | * @sst_drv_ctx: Driver context |
| 75 | * @block: Driver block to wait on |
| 76 | * |
| 77 | * This function waits without a timeout (and is interruptable) for a |
| 78 | * given block event |
| 79 | */ |
| 80 | int sst_wait_interruptible(struct intel_sst_drv *sst_drv_ctx, |
| 81 | struct sst_block *block) |
| 82 | { |
| 83 | int retval = 0; |
| 84 | |
| 85 | if (!wait_event_interruptible(sst_drv_ctx->wait_queue, |
| 86 | block->condition)) { |
| 87 | /* event wake */ |
| 88 | if (block->ret_code < 0) { |
Joe Perches | d0f40c5 | 2010-10-20 18:51:06 -0700 | [diff] [blame] | 89 | pr_err("stream failed %d\n", block->ret_code); |
Vinod Koul | fffa1cc | 2010-10-05 16:25:17 +0100 | [diff] [blame] | 90 | retval = -EBUSY; |
| 91 | } else { |
Joe Perches | d0f40c5 | 2010-10-20 18:51:06 -0700 | [diff] [blame] | 92 | pr_debug("event up\n"); |
Vinod Koul | fffa1cc | 2010-10-05 16:25:17 +0100 | [diff] [blame] | 93 | retval = 0; |
| 94 | } |
| 95 | } else { |
Joe Perches | d0f40c5 | 2010-10-20 18:51:06 -0700 | [diff] [blame] | 96 | pr_err("signal interrupted\n"); |
Vinod Koul | fffa1cc | 2010-10-05 16:25:17 +0100 | [diff] [blame] | 97 | retval = -EINTR; |
| 98 | } |
| 99 | return retval; |
| 100 | |
| 101 | } |
| 102 | |
| 103 | |
| 104 | /* |
| 105 | * sst_wait_interruptible_timeout - wait on event interruptable |
| 106 | * |
| 107 | * @sst_drv_ctx: Driver context |
| 108 | * @block: Driver block to wait on |
| 109 | * @timeout: time for wait on |
| 110 | * |
| 111 | * This function waits with a timeout value (and is interruptible) on a |
| 112 | * given block event |
| 113 | */ |
| 114 | int sst_wait_interruptible_timeout( |
| 115 | struct intel_sst_drv *sst_drv_ctx, |
| 116 | struct sst_block *block, int timeout) |
| 117 | { |
| 118 | int retval = 0; |
| 119 | |
Joe Perches | d0f40c5 | 2010-10-20 18:51:06 -0700 | [diff] [blame] | 120 | pr_debug("sst_wait_interruptible_timeout - waiting....\n"); |
Vinod Koul | fffa1cc | 2010-10-05 16:25:17 +0100 | [diff] [blame] | 121 | if (wait_event_interruptible_timeout(sst_drv_ctx->wait_queue, |
| 122 | block->condition, |
| 123 | msecs_to_jiffies(timeout))) { |
| 124 | if (block->ret_code < 0) |
Joe Perches | d0f40c5 | 2010-10-20 18:51:06 -0700 | [diff] [blame] | 125 | pr_err("stream failed %d\n", block->ret_code); |
Vinod Koul | fffa1cc | 2010-10-05 16:25:17 +0100 | [diff] [blame] | 126 | else |
Joe Perches | d0f40c5 | 2010-10-20 18:51:06 -0700 | [diff] [blame] | 127 | pr_debug("event up\n"); |
Vinod Koul | fffa1cc | 2010-10-05 16:25:17 +0100 | [diff] [blame] | 128 | retval = block->ret_code; |
| 129 | } else { |
| 130 | block->on = false; |
Joe Perches | d0f40c5 | 2010-10-20 18:51:06 -0700 | [diff] [blame] | 131 | pr_err("timeout occurred...\n"); |
Vinod Koul | fffa1cc | 2010-10-05 16:25:17 +0100 | [diff] [blame] | 132 | /*setting firmware state as uninit so that the |
| 133 | firmware will get re-downloaded on next request |
| 134 | this is because firmare not responding for 5 sec |
| 135 | is equalant to some unrecoverable error of FW |
| 136 | sst_drv_ctx->sst_state = SST_UN_INIT;*/ |
| 137 | retval = -EBUSY; |
| 138 | } |
| 139 | return retval; |
| 140 | |
| 141 | } |
| 142 | |
| 143 | |
| 144 | /* |
| 145 | * sst_wait_timeout - wait on event for timeout |
| 146 | * |
| 147 | * @sst_drv_ctx: Driver context |
| 148 | * @block: Driver block to wait on |
| 149 | * |
| 150 | * This function waits with a timeout value (and is not interruptible) on a |
| 151 | * given block event |
| 152 | */ |
| 153 | int sst_wait_timeout(struct intel_sst_drv *sst_drv_ctx, |
| 154 | struct stream_alloc_block *block) |
| 155 | { |
| 156 | int retval = 0; |
| 157 | |
| 158 | /* NOTE: |
| 159 | Observed that FW processes the alloc msg and replies even |
| 160 | before the alloc thread has finished execution */ |
Joe Perches | d0f40c5 | 2010-10-20 18:51:06 -0700 | [diff] [blame] | 161 | pr_debug("waiting for %x, condition %x\n", |
Vinod Koul | fffa1cc | 2010-10-05 16:25:17 +0100 | [diff] [blame] | 162 | block->sst_id, block->ops_block.condition); |
| 163 | if (wait_event_interruptible_timeout(sst_drv_ctx->wait_queue, |
| 164 | block->ops_block.condition, |
| 165 | msecs_to_jiffies(SST_BLOCK_TIMEOUT))) { |
| 166 | /* event wake */ |
Joe Perches | d0f40c5 | 2010-10-20 18:51:06 -0700 | [diff] [blame] | 167 | pr_debug("Event wake %x\n", block->ops_block.condition); |
| 168 | pr_debug("message ret: %d\n", block->ops_block.ret_code); |
Vinod Koul | fffa1cc | 2010-10-05 16:25:17 +0100 | [diff] [blame] | 169 | retval = block->ops_block.ret_code; |
| 170 | } else { |
| 171 | block->ops_block.on = false; |
Joe Perches | d0f40c5 | 2010-10-20 18:51:06 -0700 | [diff] [blame] | 172 | pr_err("Wait timed-out %x\n", block->ops_block.condition); |
Vinod Koul | fffa1cc | 2010-10-05 16:25:17 +0100 | [diff] [blame] | 173 | /* settign firmware state as uninit so that the |
| 174 | firmware will get redownloaded on next request |
| 175 | this is because firmare not responding for 5 sec |
| 176 | is equalant to some unrecoverable error of FW |
| 177 | sst_drv_ctx->sst_state = SST_UN_INIT;*/ |
| 178 | retval = -EBUSY; |
| 179 | } |
| 180 | return retval; |
| 181 | |
| 182 | } |
| 183 | |
| 184 | /* |
| 185 | * sst_create_large_msg - create a large IPC message |
| 186 | * |
| 187 | * @arg: ipc message |
| 188 | * |
| 189 | * this function allocates structures to send a large message to the firmware |
| 190 | */ |
| 191 | int sst_create_large_msg(struct ipc_post **arg) |
| 192 | { |
| 193 | struct ipc_post *msg; |
| 194 | |
| 195 | msg = kzalloc(sizeof(struct ipc_post), GFP_ATOMIC); |
| 196 | if (!msg) { |
Joe Perches | d0f40c5 | 2010-10-20 18:51:06 -0700 | [diff] [blame] | 197 | pr_err("kzalloc msg failed\n"); |
Vinod Koul | fffa1cc | 2010-10-05 16:25:17 +0100 | [diff] [blame] | 198 | return -ENOMEM; |
| 199 | } |
| 200 | |
| 201 | msg->mailbox_data = kzalloc(SST_MAILBOX_SIZE, GFP_ATOMIC); |
| 202 | if (!msg->mailbox_data) { |
| 203 | kfree(msg); |
Joe Perches | d0f40c5 | 2010-10-20 18:51:06 -0700 | [diff] [blame] | 204 | pr_err("kzalloc mailbox_data failed"); |
Vinod Koul | fffa1cc | 2010-10-05 16:25:17 +0100 | [diff] [blame] | 205 | return -ENOMEM; |
Joe Perches | 9fc8602 | 2011-04-10 14:31:32 -0700 | [diff] [blame] | 206 | } |
Vinod Koul | fffa1cc | 2010-10-05 16:25:17 +0100 | [diff] [blame] | 207 | *arg = msg; |
| 208 | return 0; |
| 209 | } |
| 210 | |
| 211 | /* |
| 212 | * sst_create_short_msg - create a short IPC message |
| 213 | * |
| 214 | * @arg: ipc message |
| 215 | * |
| 216 | * this function allocates structures to send a short message to the firmware |
| 217 | */ |
| 218 | int sst_create_short_msg(struct ipc_post **arg) |
| 219 | { |
| 220 | struct ipc_post *msg; |
| 221 | |
| 222 | msg = kzalloc(sizeof(*msg), GFP_ATOMIC); |
| 223 | if (!msg) { |
Joe Perches | d0f40c5 | 2010-10-20 18:51:06 -0700 | [diff] [blame] | 224 | pr_err("kzalloc msg failed\n"); |
Vinod Koul | fffa1cc | 2010-10-05 16:25:17 +0100 | [diff] [blame] | 225 | return -ENOMEM; |
| 226 | } |
| 227 | msg->mailbox_data = NULL; |
| 228 | *arg = msg; |
| 229 | return 0; |
| 230 | } |
| 231 | |
| 232 | /* |
| 233 | * sst_clean_stream - clean the stream context |
| 234 | * |
| 235 | * @stream: stream structure |
| 236 | * |
| 237 | * this function resets the stream contexts |
| 238 | * should be called in free |
| 239 | */ |
| 240 | void sst_clean_stream(struct stream_info *stream) |
| 241 | { |
| 242 | struct sst_stream_bufs *bufs = NULL, *_bufs; |
| 243 | stream->status = STREAM_UN_INIT; |
| 244 | stream->prev = STREAM_UN_INIT; |
| 245 | mutex_lock(&stream->lock); |
| 246 | list_for_each_entry_safe(bufs, _bufs, &stream->bufs, node) { |
| 247 | list_del(&bufs->node); |
| 248 | kfree(bufs); |
| 249 | } |
| 250 | mutex_unlock(&stream->lock); |
| 251 | |
| 252 | if (stream->ops != STREAM_OPS_PLAYBACK_DRM) |
| 253 | kfree(stream->decode_ibuf); |
| 254 | } |
| 255 | |
| 256 | /* |
| 257 | * sst_wake_up_alloc_block - wake up waiting block |
| 258 | * |
| 259 | * @sst_drv_ctx: Driver context |
| 260 | * @sst_id: stream id |
| 261 | * @status: status of wakeup |
| 262 | * @data: data pointer of wakeup |
| 263 | * |
| 264 | * This function wakes up a sleeping block event based on the response |
| 265 | */ |
| 266 | void sst_wake_up_alloc_block(struct intel_sst_drv *sst_drv_ctx, |
| 267 | u8 sst_id, int status, void *data) |
| 268 | { |
| 269 | int i; |
| 270 | |
| 271 | /* Unblock with retval code */ |
| 272 | for (i = 0; i < MAX_ACTIVE_STREAM; i++) { |
| 273 | if (sst_id == sst_drv_ctx->alloc_block[i].sst_id) { |
| 274 | sst_drv_ctx->alloc_block[i].ops_block.condition = true; |
| 275 | sst_drv_ctx->alloc_block[i].ops_block.ret_code = status; |
| 276 | sst_drv_ctx->alloc_block[i].ops_block.data = data; |
| 277 | wake_up(&sst_drv_ctx->wait_queue); |
| 278 | break; |
| 279 | } |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | /* |
| 284 | * sst_enable_rx_timeslot - Send msg to query for stream parameters |
| 285 | * @status: rx timeslot to be enabled |
| 286 | * |
| 287 | * This function is called when the RX timeslot is required to be enabled |
| 288 | */ |
| 289 | int sst_enable_rx_timeslot(int status) |
| 290 | { |
| 291 | int retval = 0; |
| 292 | struct ipc_post *msg = NULL; |
| 293 | |
| 294 | if (sst_create_short_msg(&msg)) { |
Joe Perches | d0f40c5 | 2010-10-20 18:51:06 -0700 | [diff] [blame] | 295 | pr_err("mem allocation failed\n"); |
Vinod Koul | fffa1cc | 2010-10-05 16:25:17 +0100 | [diff] [blame] | 296 | return -ENOMEM; |
| 297 | } |
Joe Perches | d0f40c5 | 2010-10-20 18:51:06 -0700 | [diff] [blame] | 298 | pr_debug("ipc message sending: ENABLE_RX_TIME_SLOT\n"); |
Vinod Koul | fffa1cc | 2010-10-05 16:25:17 +0100 | [diff] [blame] | 299 | sst_fill_header(&msg->header, IPC_IA_ENABLE_RX_TIME_SLOT, 0, 0); |
| 300 | msg->header.part.data = status; |
| 301 | sst_drv_ctx->hs_info_blk.condition = false; |
| 302 | sst_drv_ctx->hs_info_blk.ret_code = 0; |
| 303 | sst_drv_ctx->hs_info_blk.on = true; |
| 304 | spin_lock(&sst_drv_ctx->list_spin_lock); |
| 305 | list_add_tail(&msg->node, |
| 306 | &sst_drv_ctx->ipc_dispatch_list); |
| 307 | spin_unlock(&sst_drv_ctx->list_spin_lock); |
| 308 | sst_post_message(&sst_drv_ctx->ipc_post_msg_wq); |
| 309 | retval = sst_wait_interruptible_timeout(sst_drv_ctx, |
| 310 | &sst_drv_ctx->hs_info_blk, SST_BLOCK_TIMEOUT); |
| 311 | return retval; |
| 312 | } |
| 313 | |