Use the generic IPC/mailbox APIs to replace the original processing code for Baytrail platform.
Signed-off-by: Jin Yao yao.jin@linux.intel.com --- sound/soc/intel/baytrail/sst-baytrail-ipc.c | 360 ++++++---------------------- 1 file changed, 77 insertions(+), 283 deletions(-)
diff --git a/sound/soc/intel/baytrail/sst-baytrail-ipc.c b/sound/soc/intel/baytrail/sst-baytrail-ipc.c index aabb9b0..1efb33b 100644 --- a/sound/soc/intel/baytrail/sst-baytrail-ipc.c +++ b/sound/soc/intel/baytrail/sst-baytrail-ipc.c @@ -31,6 +31,7 @@ #include "sst-baytrail-ipc.h" #include "../common/sst-dsp.h" #include "../common/sst-dsp-priv.h" +#include "../common/sst-ipc.h"
/* IPC message timeout */ #define IPC_TIMEOUT_MSECS 300 @@ -142,23 +143,6 @@ struct sst_byt_fw_init { u8 debug_info; } __packed;
-/* driver internal IPC message structure */ -struct ipc_message { - struct list_head list; - u64 header; - - /* direction wrt host CPU */ - char tx_data[SST_BYT_IPC_MAX_PAYLOAD_SIZE]; - size_t tx_size; - char rx_data[SST_BYT_IPC_MAX_PAYLOAD_SIZE]; - size_t rx_size; - - wait_queue_head_t waitq; - bool complete; - bool wait; - int errno; -}; - struct sst_byt_stream; struct sst_byt;
@@ -195,14 +179,7 @@ struct sst_byt { struct sst_fw *fw;
/* IPC messaging */ - struct list_head tx_list; - struct list_head rx_list; - struct list_head empty_list; - wait_queue_head_t wait_txq; - struct task_struct *tx_thread; - struct kthread_worker kworker; - struct kthread_work kwork; - struct ipc_message *msg; + struct sst_generic_ipc ipc; };
static inline u64 sst_byt_header(int msg_id, int data, bool large, int str_id) @@ -246,209 +223,6 @@ static struct sst_byt_stream *sst_byt_get_stream(struct sst_byt *byt, return NULL; }
-static void sst_byt_ipc_shim_dbg(struct sst_byt *byt, const char *text) -{ - struct sst_dsp *sst = byt->dsp; - u64 isr, ipcd, imrx, ipcx; - - ipcx = sst_dsp_shim_read64_unlocked(sst, SST_IPCX); - isr = sst_dsp_shim_read64_unlocked(sst, SST_ISRX); - ipcd = sst_dsp_shim_read64_unlocked(sst, SST_IPCD); - imrx = sst_dsp_shim_read64_unlocked(sst, SST_IMRX); - - dev_err(byt->dev, - "ipc: --%s-- ipcx 0x%llx isr 0x%llx ipcd 0x%llx imrx 0x%llx\n", - text, ipcx, isr, ipcd, imrx); -} - -/* locks held by caller */ -static struct ipc_message *sst_byt_msg_get_empty(struct sst_byt *byt) -{ - struct ipc_message *msg = NULL; - - if (!list_empty(&byt->empty_list)) { - msg = list_first_entry(&byt->empty_list, - struct ipc_message, list); - list_del(&msg->list); - } - - return msg; -} - -static void sst_byt_ipc_tx_msgs(struct kthread_work *work) -{ - struct sst_byt *byt = - container_of(work, struct sst_byt, kwork); - struct ipc_message *msg; - u64 ipcx; - unsigned long flags; - - spin_lock_irqsave(&byt->dsp->spinlock, flags); - if (list_empty(&byt->tx_list)) { - spin_unlock_irqrestore(&byt->dsp->spinlock, flags); - return; - } - - /* if the DSP is busy we will TX messages after IRQ */ - ipcx = sst_dsp_shim_read64_unlocked(byt->dsp, SST_IPCX); - if (ipcx & SST_BYT_IPCX_BUSY) { - spin_unlock_irqrestore(&byt->dsp->spinlock, flags); - return; - } - - msg = list_first_entry(&byt->tx_list, struct ipc_message, list); - - list_move(&msg->list, &byt->rx_list); - - /* send the message */ - if (msg->header & IPC_HEADER_LARGE(true)) - sst_dsp_outbox_write(byt->dsp, msg->tx_data, msg->tx_size); - sst_dsp_shim_write64_unlocked(byt->dsp, SST_IPCX, msg->header); - - spin_unlock_irqrestore(&byt->dsp->spinlock, flags); -} - -static inline void sst_byt_tx_msg_reply_complete(struct sst_byt *byt, - struct ipc_message *msg) -{ - msg->complete = true; - - if (!msg->wait) - list_add_tail(&msg->list, &byt->empty_list); - else - wake_up(&msg->waitq); -} - -static void sst_byt_drop_all(struct sst_byt *byt) -{ - struct ipc_message *msg, *tmp; - unsigned long flags; - - /* drop all TX and Rx messages before we stall + reset DSP */ - spin_lock_irqsave(&byt->dsp->spinlock, flags); - list_for_each_entry_safe(msg, tmp, &byt->tx_list, list) { - list_move(&msg->list, &byt->empty_list); - } - - list_for_each_entry_safe(msg, tmp, &byt->rx_list, list) { - list_move(&msg->list, &byt->empty_list); - } - - spin_unlock_irqrestore(&byt->dsp->spinlock, flags); -} - -static int sst_byt_tx_wait_done(struct sst_byt *byt, struct ipc_message *msg, - void *rx_data) -{ - unsigned long flags; - int ret; - - /* wait for DSP completion */ - ret = wait_event_timeout(msg->waitq, msg->complete, - msecs_to_jiffies(IPC_TIMEOUT_MSECS)); - - spin_lock_irqsave(&byt->dsp->spinlock, flags); - if (ret == 0) { - list_del(&msg->list); - sst_byt_ipc_shim_dbg(byt, "message timeout"); - - ret = -ETIMEDOUT; - } else { - - /* copy the data returned from DSP */ - if (msg->rx_size) - memcpy(rx_data, msg->rx_data, msg->rx_size); - ret = msg->errno; - } - - list_add_tail(&msg->list, &byt->empty_list); - spin_unlock_irqrestore(&byt->dsp->spinlock, flags); - return ret; -} - -static int sst_byt_ipc_tx_message(struct sst_byt *byt, u64 header, - void *tx_data, size_t tx_bytes, - void *rx_data, size_t rx_bytes, int wait) -{ - unsigned long flags; - struct ipc_message *msg; - - spin_lock_irqsave(&byt->dsp->spinlock, flags); - - msg = sst_byt_msg_get_empty(byt); - if (msg == NULL) { - spin_unlock_irqrestore(&byt->dsp->spinlock, flags); - return -EBUSY; - } - - msg->header = header; - msg->tx_size = tx_bytes; - msg->rx_size = rx_bytes; - msg->wait = wait; - msg->errno = 0; - msg->complete = false; - - if (tx_bytes) { - /* msg content = lower 32-bit of the header + data */ - *(u32 *)msg->tx_data = (u32)(header & (u32)-1); - memcpy(msg->tx_data + sizeof(u32), tx_data, tx_bytes); - msg->tx_size += sizeof(u32); - } - - list_add_tail(&msg->list, &byt->tx_list); - spin_unlock_irqrestore(&byt->dsp->spinlock, flags); - - queue_kthread_work(&byt->kworker, &byt->kwork); - - if (wait) - return sst_byt_tx_wait_done(byt, msg, rx_data); - else - return 0; -} - -static inline int sst_byt_ipc_tx_msg_wait(struct sst_byt *byt, u64 header, - void *tx_data, size_t tx_bytes, - void *rx_data, size_t rx_bytes) -{ - return sst_byt_ipc_tx_message(byt, header, tx_data, tx_bytes, - rx_data, rx_bytes, 1); -} - -static inline int sst_byt_ipc_tx_msg_nowait(struct sst_byt *byt, u64 header, - void *tx_data, size_t tx_bytes) -{ - return sst_byt_ipc_tx_message(byt, header, tx_data, tx_bytes, - NULL, 0, 0); -} - -static struct ipc_message *sst_byt_reply_find_msg(struct sst_byt *byt, - u64 header) -{ - struct ipc_message *msg = NULL, *_msg; - u64 mask; - - /* match reply to message sent based on msg and stream IDs */ - mask = IPC_HEADER_MSG_ID_MASK | - IPC_HEADER_STR_ID_MASK << IPC_HEADER_STR_ID_SHIFT; - header &= mask; - - if (list_empty(&byt->rx_list)) { - dev_err(byt->dev, - "ipc: rx list is empty but received 0x%llx\n", header); - goto out; - } - - list_for_each_entry(_msg, &byt->rx_list, list) { - if ((_msg->header & mask) == header) { - msg = _msg; - break; - } - } - -out: - return msg; -} - static void sst_byt_stream_update(struct sst_byt *byt, struct ipc_message *msg) { struct sst_byt_stream *stream; @@ -477,7 +251,7 @@ static int sst_byt_process_reply(struct sst_byt *byt, u64 header) { struct ipc_message *msg;
- msg = sst_byt_reply_find_msg(byt, header); + msg = sst_ipc_reply_find_msg(&byt->ipc, header); if (msg == NULL) return 1;
@@ -491,7 +265,7 @@ static int sst_byt_process_reply(struct sst_byt *byt, u64 header)
list_del(&msg->list); /* wake up */ - sst_byt_tx_msg_reply_complete(byt, msg); + sst_ipc_tx_msg_reply_complete(&byt->ipc, msg);
return 1; } @@ -538,6 +312,7 @@ static irqreturn_t sst_byt_irq_thread(int irq, void *context) { struct sst_dsp *sst = (struct sst_dsp *) context; struct sst_byt *byt = sst_dsp_get_thread_context(sst); + struct sst_generic_ipc *ipc = &byt->ipc; u64 header; unsigned long flags;
@@ -569,7 +344,7 @@ static irqreturn_t sst_byt_irq_thread(int irq, void *context) spin_unlock_irqrestore(&sst->spinlock, flags);
/* continue to send any remaining messages... */ - queue_kthread_work(&byt->kworker, &byt->kwork); + queue_kthread_work(&ipc->kworker, &ipc->kwork);
return IRQ_HANDLED; } @@ -656,7 +431,8 @@ int sst_byt_stream_commit(struct sst_byt *byt, struct sst_byt_stream *stream) header = sst_byt_header(IPC_IA_ALLOC_STREAM, sizeof(*str_req) + sizeof(u32), true, stream->str_id); - ret = sst_byt_ipc_tx_msg_wait(byt, header, str_req, sizeof(*str_req), + ret = sst_ipc_tx_message_wait(&byt->ipc, header, str_req, + sizeof(*str_req), reply, sizeof(*reply)); if (ret < 0) { dev_err(byt->dev, "ipc: error stream commit failed\n"); @@ -679,7 +455,7 @@ int sst_byt_stream_free(struct sst_byt *byt, struct sst_byt_stream *stream) goto out;
header = sst_byt_header(IPC_IA_FREE_STREAM, 0, false, stream->str_id); - ret = sst_byt_ipc_tx_msg_wait(byt, header, NULL, 0, NULL, 0); + ret = sst_ipc_tx_message_wait(&byt->ipc, header, NULL, 0, NULL, 0); if (ret < 0) { dev_err(byt->dev, "ipc: free stream %d failed\n", stream->str_id); @@ -703,9 +479,11 @@ static int sst_byt_stream_operations(struct sst_byt *byt, int type,
header = sst_byt_header(type, 0, false, stream_id); if (wait) - return sst_byt_ipc_tx_msg_wait(byt, header, NULL, 0, NULL, 0); + return sst_ipc_tx_message_wait(&byt->ipc, header, NULL, + 0, NULL, 0); else - return sst_byt_ipc_tx_msg_nowait(byt, header, NULL, 0); + return sst_ipc_tx_message_nowait(&byt->ipc, header, + NULL, 0); }
/* stream ALSA trigger operations */ @@ -725,7 +503,7 @@ int sst_byt_stream_start(struct sst_byt *byt, struct sst_byt_stream *stream, tx_msg = &start_stream; size = sizeof(start_stream);
- ret = sst_byt_ipc_tx_msg_nowait(byt, header, tx_msg, size); + ret = sst_ipc_tx_message_nowait(&byt->ipc, header, tx_msg, size); if (ret < 0) dev_err(byt->dev, "ipc: error failed to start stream %d\n", stream->str_id); @@ -790,23 +568,6 @@ int sst_byt_get_dsp_position(struct sst_byt *byt, return do_div(fw_tstamp.ring_buffer_counter, buffer_size); }
-static int msg_empty_list_init(struct sst_byt *byt) -{ - struct ipc_message *msg; - int i; - - byt->msg = kzalloc(sizeof(*msg) * IPC_EMPTY_LIST_SIZE, GFP_KERNEL); - if (byt->msg == NULL) - return -ENOMEM; - - for (i = 0; i < IPC_EMPTY_LIST_SIZE; i++) { - init_waitqueue_head(&byt->msg[i].waitq); - list_add(&byt->msg[i].list, &byt->empty_list); - } - - return 0; -} - struct sst_dsp *sst_byt_get_dsp(struct sst_byt *byt) { return byt->dsp; @@ -823,7 +584,7 @@ int sst_byt_dsp_suspend_late(struct device *dev, struct sst_pdata *pdata)
dev_dbg(byt->dev, "dsp reset\n"); sst_dsp_reset(byt->dsp); - sst_byt_drop_all(byt); + sst_ipc_drop_all(&byt->ipc); dev_dbg(byt->dev, "dsp in reset\n");
dev_dbg(byt->dev, "free all blocks and unload fw\n"); @@ -876,9 +637,52 @@ int sst_byt_dsp_wait_for_ready(struct device *dev, struct sst_pdata *pdata) } EXPORT_SYMBOL_GPL(sst_byt_dsp_wait_for_ready);
+static void byt_tx_msg(struct sst_generic_ipc *ipc, struct ipc_message *msg) +{ + if (msg->header & IPC_HEADER_LARGE(true)) + sst_dsp_outbox_write(ipc->dsp, msg->tx_data, msg->tx_size); + + sst_dsp_shim_write64_unlocked(ipc->dsp, SST_IPCX, msg->header); +} + +static void byt_shim_dbg(struct sst_generic_ipc *ipc, const char *text) +{ + struct sst_dsp *sst = ipc->dsp; + u64 isr, ipcd, imrx, ipcx; + + ipcx = sst_dsp_shim_read64_unlocked(sst, SST_IPCX); + isr = sst_dsp_shim_read64_unlocked(sst, SST_ISRX); + ipcd = sst_dsp_shim_read64_unlocked(sst, SST_IPCD); + imrx = sst_dsp_shim_read64_unlocked(sst, SST_IMRX); + + dev_err(ipc->dev, + "ipc: --%s-- ipcx 0x%llx isr 0x%llx ipcd 0x%llx imrx 0x%llx\n", + text, ipcx, isr, ipcd, imrx); +} + +static void byt_tx_data_copy(struct ipc_message *msg, char *tx_data, + size_t tx_size) +{ + /* msg content = lower 32-bit of the header + data */ + *(u32 *)msg->tx_data = (u32)(msg->header & (u32)-1); + memcpy(msg->tx_data + sizeof(u32), tx_data, tx_size); + msg->tx_size += sizeof(u32); +} + +static u64 byt_reply_msg_match(u64 header, u64 *mask) +{ + /* match reply to message sent based on msg and stream IDs */ + *mask = IPC_HEADER_MSG_ID_MASK | + IPC_HEADER_STR_ID_MASK << IPC_HEADER_STR_ID_SHIFT; + header &= *mask; + + return header; +} + int sst_byt_dsp_init(struct device *dev, struct sst_pdata *pdata) { struct sst_byt *byt; + struct sst_generic_ipc *ipc; struct sst_fw *byt_sst_fw; struct sst_byt_fw_init init; int err; @@ -889,39 +693,30 @@ int sst_byt_dsp_init(struct device *dev, struct sst_pdata *pdata) if (byt == NULL) return -ENOMEM;
- byt->dev = dev; - INIT_LIST_HEAD(&byt->stream_list); - INIT_LIST_HEAD(&byt->tx_list); - INIT_LIST_HEAD(&byt->rx_list); - INIT_LIST_HEAD(&byt->empty_list); - init_waitqueue_head(&byt->boot_wait); - init_waitqueue_head(&byt->wait_txq); + ipc = &byt->ipc; + ipc->dev = dev; + ipc->ops.tx_msg = byt_tx_msg; + ipc->ops.shim_dbg = byt_shim_dbg; + ipc->ops.tx_data_copy = byt_tx_data_copy; + ipc->ops.reply_msg_match = byt_reply_msg_match;
- err = msg_empty_list_init(byt); - if (err < 0) - return -ENOMEM; - - /* start the IPC message thread */ - init_kthread_worker(&byt->kworker); - byt->tx_thread = kthread_run(kthread_worker_fn, - &byt->kworker, "%s", - dev_name(byt->dev)); - if (IS_ERR(byt->tx_thread)) { - err = PTR_ERR(byt->tx_thread); - dev_err(byt->dev, "error failed to create message TX task\n"); - goto err_free_msg; - } - init_kthread_work(&byt->kwork, sst_byt_ipc_tx_msgs); + err = sst_ipc_init(ipc); + if (err != 0) + goto ipc_init_err;
+ INIT_LIST_HEAD(&byt->stream_list); + init_waitqueue_head(&byt->boot_wait); byt_dev.thread_context = byt;
/* init SST shim */ byt->dsp = sst_dsp_new(dev, &byt_dev, pdata); if (byt->dsp == NULL) { err = -ENODEV; - goto dsp_err; + goto dsp_new_err; }
+ ipc->dsp = byt->dsp; + /* keep the DSP in reset state for base FW loading */ sst_dsp_reset(byt->dsp);
@@ -961,10 +756,10 @@ boot_err: sst_fw_free(byt_sst_fw); fw_err: sst_dsp_free(byt->dsp); -dsp_err: - kthread_stop(byt->tx_thread); -err_free_msg: - kfree(byt->msg); +dsp_new_err: + sst_ipc_fini(ipc); +ipc_init_err: + kfree(byt);
return err; } @@ -977,7 +772,6 @@ void sst_byt_dsp_free(struct device *dev, struct sst_pdata *pdata) sst_dsp_reset(byt->dsp); sst_fw_free_all(byt->dsp); sst_dsp_free(byt->dsp); - kthread_stop(byt->tx_thread); - kfree(byt->msg); + sst_ipc_fini(&byt->ipc); } EXPORT_SYMBOL_GPL(sst_byt_dsp_free);