/* * while handling the interrupts, we need to check for message status and * then if we are blocking for a message * * here we are unblocking the blocked ones, this is based on id we have * passed and search that for block threads. * We will not find block in two cases * a) when its small message and block in not there, so silently ignore * them * b) when we are actually not able to find the block (bug perhaps) * * Since we have bit of small messages we can spam kernel log with err * print on above so need to keep as debug prints which should be enabled * via dynamic debug while debugging IPC issues
*/ int sst_wake_up_block(struct intel_sst_drv *ctx, int result,
u32 drv_id, u32 ipc, void *data, u32 size)
{ struct sst_block *block;
dev_dbg(ctx->dev, "Enter\n");
spin_lock_bh(&ctx->block_lock);
list_for_each_entry(block, &ctx->block_list, node) {
dev_dbg(ctx->dev, "Block ipc %d, drv_id %d\n", block->msg_id,
block->drv_id); if (block->msg_id == ipc && block->drv_id == drv_id) {
dev_dbg(ctx->dev, "free up the block\n");
block->ret_code = result;
block->data = data;
block->size = size;
block->condition = true;
spin_unlock_bh(&ctx->block_lock);
wake_up(&ctx->wait_queue); return 0;
}
}
spin_unlock_bh(&ctx->block_lock);
dev_dbg(ctx->dev, "Block not found or a response received for a short msg for ipc %d, drv_id %d\n",
ipc, drv_id); return -EINVAL;
}
dev_dbg(ctx->dev, "Enter\n");
spin_lock_bh(&ctx->block_lock);
list_for_each_entry_safe(block, __block, &ctx->block_list, node) { if (block == freed) {
pr_debug("pvt_id freed --> %d\n", freed->drv_id); /* toggle the index position of pvt_id */
list_del(&freed->node);
spin_unlock_bh(&ctx->block_lock);
kfree(freed->data);
freed->data = NULL;
kfree(freed); return 0;
}
}
spin_unlock_bh(&ctx->block_lock);
dev_err(ctx->dev, "block is already freed!!!\n"); return -EINVAL;
}
int sst_post_message_mrfld(struct intel_sst_drv *sst_drv_ctx, struct ipc_post *ipc_msg, bool sync)
{ struct ipc_post *msg = ipc_msg; union ipc_header_mrfld header; unsignedint loop_count = 0; int retval = 0; unsignedlong irq_flags;
dev_dbg(sst_drv_ctx->dev, "Enter: sync: %d\n", sync);
spin_lock_irqsave(&sst_drv_ctx->ipc_spin_lock, irq_flags);
header.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCX); if (sync) { while (header.p.header_high.part.busy) { if (loop_count > 25) {
dev_err(sst_drv_ctx->dev, "sst: Busy wait failed, can't send this msg\n");
retval = -EBUSY; goto out;
}
cpu_relax();
loop_count++;
header.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCX);
}
} else { if (list_empty(&sst_drv_ctx->ipc_dispatch_list)) { /* queue is empty, nothing to send */
spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
dev_dbg(sst_drv_ctx->dev, "Empty msg queue... NO Action\n"); return 0;
}
if (header.p.header_high.part.busy) {
spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
dev_dbg(sst_drv_ctx->dev, "Busy not free... post later\n"); return 0;
}
/* copy msg from list */
msg = list_entry(sst_drv_ctx->ipc_dispatch_list.next, struct ipc_post, node);
list_del(&msg->node);
}
dev_dbg(sst_drv_ctx->dev, "sst: Post message: header = %x\n",
msg->mrfld_header.p.header_high.full);
dev_dbg(sst_drv_ctx->dev, "sst: size = 0x%x\n",
msg->mrfld_header.p.header_low_payload);
if (msg->mrfld_header.p.header_high.part.large)
memcpy_toio(sst_drv_ctx->mailbox + SST_MAILBOX_SEND,
msg->mailbox_data,
msg->mrfld_header.p.header_low_payload);
/* * process_fw_init - process the FW init msg * * @msg: IPC message mailbox data from FW * * This function processes the FW init msg from FW * marks FW state and prints debug info of loaded FW
*/ staticvoid process_fw_init(struct intel_sst_drv *sst_drv_ctx, void *msg)
{ struct ipc_header_fw_init *init =
(struct ipc_header_fw_init *)msg; int retval = 0;
dev_dbg(sst_drv_ctx->dev, "*** FW Init msg came***\n"); if (init->result) {
sst_set_fw_state_locked(sst_drv_ctx, SST_RESET);
dev_err(sst_drv_ctx->dev, "FW Init failed, Error %x\n",
init->result);
retval = init->result; goto ret;
} if (memcmp(&sst_drv_ctx->fw_version, &init->fw_version, sizeof(init->fw_version)))
dev_info(sst_drv_ctx->dev, "FW Version %02x.%02x.%02x.%02x\n",
init->fw_version.type, init->fw_version.major,
init->fw_version.minor, init->fw_version.build);
dev_dbg(sst_drv_ctx->dev, "Build date %s Time %s\n",
init->build_info.date, init->build_info.time);
/* Save FW version */
sst_drv_ctx->fw_version.type = init->fw_version.type;
sst_drv_ctx->fw_version.major = init->fw_version.major;
sst_drv_ctx->fw_version.minor = init->fw_version.minor;
sst_drv_ctx->fw_version.build = init->fw_version.build;
switch (msg_id) { case IPC_SST_PERIOD_ELAPSED_MRFLD:
pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id;
str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id); if (str_id > 0) {
dev_dbg(sst_drv_ctx->dev, "Period elapsed rcvd for pipe id 0x%x\n",
pipe_id);
stream = &sst_drv_ctx->streams[str_id]; /* If stream is dropped, skip processing this message*/ if (stream->status == STREAM_INIT) break; if (stream->period_elapsed)
stream->period_elapsed(stream->pcm_substream); if (stream->compr_cb)
stream->compr_cb(stream->compr_cb_param);
} break;
case IPC_IA_DRAIN_STREAM_MRFLD:
pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id;
str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id); if (str_id > 0) {
stream = &sst_drv_ctx->streams[str_id]; if (stream->drain_notify)
stream->drain_notify(stream->drain_cb_param);
} break;
case IPC_IA_FW_ASYNC_ERR_MRFLD:
dev_err(sst_drv_ctx->dev, "FW sent async error msg:\n"); for (i = 0; i < (data_size/4); i++)
print_hex_dump(KERN_DEBUG, NULL, DUMP_PREFIX_NONE,
16, 4, data_offset, data_size, false); break;
case IPC_IA_FW_INIT_CMPLT_MRFLD:
process_fw_init(sst_drv_ctx, data_offset); break;
case IPC_IA_BUF_UNDER_RUN_MRFLD:
pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id;
str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id); if (str_id > 0)
dev_err(sst_drv_ctx->dev, "Buffer under-run for pipe:%#x str_id:%d\n",
pipe_id, str_id); break;
dev_dbg(sst_drv_ctx->dev, "IPC process message header %x payload %x\n",
msg->mrfld_header.p.header_high.full,
msg->mrfld_header.p.header_low_payload);
drv_id = msg_high.part.drv_id;
/* Check for async messages first */ if (drv_id == SST_ASYNC_DRV_ID) { /*FW sent async large message*/
process_fw_async_msg(sst_drv_ctx, msg); return;
}
/* FW sent short error response for an IPC */ if (msg_high.part.result && !msg_high.part.large) { /* 32-bit FW error code in msg_low */
dev_err(sst_drv_ctx->dev, "FW sent error response 0x%x", msg_low);
sst_wake_up_block(sst_drv_ctx, msg_high.part.result,
msg_high.part.drv_id,
msg_high.part.msg_id, NULL, 0); return;
}
/* * Process all valid responses * if it is a large message, the payload contains the size to * copy from mailbox
**/ if (msg_high.part.large) {
data = kmemdup((void *)msg->mailbox_data, msg_low, GFP_KERNEL); if (!data) return; /* Copy command id so that we can use to put sst to reset */
dsp_hdr = (struct ipc_dsp_hdr *)data;
dev_dbg(sst_drv_ctx->dev, "cmd_id %d\n", dsp_hdr->cmd_id); if (sst_wake_up_block(sst_drv_ctx, msg_high.part.result,
msg_high.part.drv_id,
msg_high.part.msg_id, data, msg_low))
kfree(data);
} else {
sst_wake_up_block(sst_drv_ctx, msg_high.part.result,
msg_high.part.drv_id,
msg_high.part.msg_id, NULL, 0);
}
}
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