299 lines
7.4 KiB
C
299 lines
7.4 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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//
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// Copyright(c) 2020 Intel Corporation. All rights reserved.
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//
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// Author: Cezary Rojewski <cezary.rojewski@intel.com>
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//
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#include <linux/irqreturn.h>
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#include "core.h"
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#include "messages.h"
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#include "registers.h"
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#include "trace.h"
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#define CATPT_IPC_TIMEOUT_MS 300
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void catpt_ipc_init(struct catpt_ipc *ipc, struct device *dev)
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{
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ipc->dev = dev;
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ipc->ready = false;
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ipc->default_timeout = CATPT_IPC_TIMEOUT_MS;
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init_completion(&ipc->done_completion);
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init_completion(&ipc->busy_completion);
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spin_lock_init(&ipc->lock);
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mutex_init(&ipc->mutex);
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}
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static int catpt_ipc_arm(struct catpt_ipc *ipc, struct catpt_fw_ready *config)
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{
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/*
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* Both tx and rx are put into and received from outbox. Inbox is
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* only used for notifications where payload size is known upfront,
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* thus no separate buffer is allocated for it.
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*/
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ipc->rx.data = devm_kzalloc(ipc->dev, config->outbox_size, GFP_KERNEL);
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if (!ipc->rx.data)
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return -ENOMEM;
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memcpy(&ipc->config, config, sizeof(*config));
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ipc->ready = true;
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return 0;
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}
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static void catpt_ipc_msg_init(struct catpt_ipc *ipc,
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struct catpt_ipc_msg *reply)
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{
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lockdep_assert_held(&ipc->lock);
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ipc->rx.header = 0;
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ipc->rx.size = reply ? reply->size : 0;
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reinit_completion(&ipc->done_completion);
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reinit_completion(&ipc->busy_completion);
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}
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static void catpt_dsp_send_tx(struct catpt_dev *cdev,
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const struct catpt_ipc_msg *tx)
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{
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u32 header = tx->header | CATPT_IPCC_BUSY;
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trace_catpt_ipc_request(header);
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trace_catpt_ipc_payload(tx->data, tx->size);
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memcpy_toio(catpt_outbox_addr(cdev), tx->data, tx->size);
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catpt_writel_shim(cdev, IPCC, header);
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}
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static int catpt_wait_msg_completion(struct catpt_dev *cdev, int timeout)
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{
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struct catpt_ipc *ipc = &cdev->ipc;
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int ret;
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ret = wait_for_completion_timeout(&ipc->done_completion,
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msecs_to_jiffies(timeout));
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if (!ret)
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return -ETIMEDOUT;
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if (ipc->rx.rsp.status != CATPT_REPLY_PENDING)
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return 0;
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/* wait for delayed reply */
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ret = wait_for_completion_timeout(&ipc->busy_completion,
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msecs_to_jiffies(timeout));
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return ret ? 0 : -ETIMEDOUT;
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}
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static int catpt_dsp_do_send_msg(struct catpt_dev *cdev,
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struct catpt_ipc_msg request,
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struct catpt_ipc_msg *reply, int timeout)
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{
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struct catpt_ipc *ipc = &cdev->ipc;
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unsigned long flags;
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int ret;
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if (!ipc->ready)
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return -EPERM;
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if (request.size > ipc->config.outbox_size ||
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(reply && reply->size > ipc->config.outbox_size))
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return -EINVAL;
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spin_lock_irqsave(&ipc->lock, flags);
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catpt_ipc_msg_init(ipc, reply);
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catpt_dsp_send_tx(cdev, &request);
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spin_unlock_irqrestore(&ipc->lock, flags);
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ret = catpt_wait_msg_completion(cdev, timeout);
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if (ret) {
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dev_crit(cdev->dev, "communication severed: %d, rebooting dsp..\n",
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ret);
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ipc->ready = false;
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/* TODO: attempt recovery */
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return ret;
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}
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ret = ipc->rx.rsp.status;
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if (reply) {
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reply->header = ipc->rx.header;
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if (!ret && reply->data)
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memcpy(reply->data, ipc->rx.data, reply->size);
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}
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return ret;
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}
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int catpt_dsp_send_msg_timeout(struct catpt_dev *cdev,
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struct catpt_ipc_msg request,
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struct catpt_ipc_msg *reply, int timeout)
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{
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struct catpt_ipc *ipc = &cdev->ipc;
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int ret;
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mutex_lock(&ipc->mutex);
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ret = catpt_dsp_do_send_msg(cdev, request, reply, timeout);
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mutex_unlock(&ipc->mutex);
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return ret;
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}
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int catpt_dsp_send_msg(struct catpt_dev *cdev, struct catpt_ipc_msg request,
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struct catpt_ipc_msg *reply)
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{
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return catpt_dsp_send_msg_timeout(cdev, request, reply,
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cdev->ipc.default_timeout);
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}
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static void
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catpt_dsp_notify_stream(struct catpt_dev *cdev, union catpt_notify_msg msg)
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{
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struct catpt_stream_runtime *stream;
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struct catpt_notify_position pos;
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struct catpt_notify_glitch glitch;
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stream = catpt_stream_find(cdev, msg.stream_hw_id);
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if (!stream) {
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dev_warn(cdev->dev, "notify %d for non-existent stream %d\n",
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msg.notify_reason, msg.stream_hw_id);
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return;
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}
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switch (msg.notify_reason) {
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case CATPT_NOTIFY_POSITION_CHANGED:
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memcpy_fromio(&pos, catpt_inbox_addr(cdev), sizeof(pos));
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trace_catpt_ipc_payload((u8 *)&pos, sizeof(pos));
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catpt_stream_update_position(cdev, stream, &pos);
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break;
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case CATPT_NOTIFY_GLITCH_OCCURRED:
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memcpy_fromio(&glitch, catpt_inbox_addr(cdev), sizeof(glitch));
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trace_catpt_ipc_payload((u8 *)&glitch, sizeof(glitch));
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dev_warn(cdev->dev, "glitch %d at pos: 0x%08llx, wp: 0x%08x\n",
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glitch.type, glitch.presentation_pos,
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glitch.write_pos);
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break;
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default:
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dev_warn(cdev->dev, "unknown notification: %d received\n",
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msg.notify_reason);
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break;
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}
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}
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static void catpt_dsp_copy_rx(struct catpt_dev *cdev, u32 header)
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{
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struct catpt_ipc *ipc = &cdev->ipc;
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ipc->rx.header = header;
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if (ipc->rx.rsp.status != CATPT_REPLY_SUCCESS)
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return;
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memcpy_fromio(ipc->rx.data, catpt_outbox_addr(cdev), ipc->rx.size);
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trace_catpt_ipc_payload(ipc->rx.data, ipc->rx.size);
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}
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static void catpt_dsp_process_response(struct catpt_dev *cdev, u32 header)
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{
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union catpt_notify_msg msg = CATPT_MSG(header);
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struct catpt_ipc *ipc = &cdev->ipc;
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if (msg.fw_ready) {
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struct catpt_fw_ready config;
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/* to fit 32b header original address is shifted right by 3 */
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u32 off = msg.mailbox_address << 3;
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memcpy_fromio(&config, cdev->lpe_ba + off, sizeof(config));
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trace_catpt_ipc_payload((u8 *)&config, sizeof(config));
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catpt_ipc_arm(ipc, &config);
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complete(&cdev->fw_ready);
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return;
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}
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switch (msg.global_msg_type) {
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case CATPT_GLB_REQUEST_CORE_DUMP:
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dev_err(cdev->dev, "ADSP device coredump received\n");
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ipc->ready = false;
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catpt_coredump(cdev);
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/* TODO: attempt recovery */
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break;
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case CATPT_GLB_STREAM_MESSAGE:
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switch (msg.stream_msg_type) {
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case CATPT_STRM_NOTIFICATION:
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catpt_dsp_notify_stream(cdev, msg);
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break;
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default:
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catpt_dsp_copy_rx(cdev, header);
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/* signal completion of delayed reply */
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complete(&ipc->busy_completion);
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break;
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}
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break;
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default:
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dev_warn(cdev->dev, "unknown response: %d received\n",
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msg.global_msg_type);
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break;
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}
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}
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irqreturn_t catpt_dsp_irq_thread(int irq, void *dev_id)
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{
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struct catpt_dev *cdev = dev_id;
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u32 ipcd;
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ipcd = catpt_readl_shim(cdev, IPCD);
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trace_catpt_ipc_notify(ipcd);
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/* ensure there is delayed reply or notification to process */
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if (!(ipcd & CATPT_IPCD_BUSY))
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return IRQ_NONE;
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catpt_dsp_process_response(cdev, ipcd);
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/* tell DSP processing is completed */
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catpt_updatel_shim(cdev, IPCD, CATPT_IPCD_BUSY | CATPT_IPCD_DONE,
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CATPT_IPCD_DONE);
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/* unmask dsp BUSY interrupt */
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catpt_updatel_shim(cdev, IMC, CATPT_IMC_IPCDB, 0);
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return IRQ_HANDLED;
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}
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irqreturn_t catpt_dsp_irq_handler(int irq, void *dev_id)
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{
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struct catpt_dev *cdev = dev_id;
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irqreturn_t ret = IRQ_NONE;
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u32 isc, ipcc;
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isc = catpt_readl_shim(cdev, ISC);
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trace_catpt_irq(isc);
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/* immediate reply */
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if (isc & CATPT_ISC_IPCCD) {
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/* mask host DONE interrupt */
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catpt_updatel_shim(cdev, IMC, CATPT_IMC_IPCCD, CATPT_IMC_IPCCD);
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ipcc = catpt_readl_shim(cdev, IPCC);
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trace_catpt_ipc_reply(ipcc);
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catpt_dsp_copy_rx(cdev, ipcc);
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complete(&cdev->ipc.done_completion);
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/* tell DSP processing is completed */
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catpt_updatel_shim(cdev, IPCC, CATPT_IPCC_DONE, 0);
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/* unmask host DONE interrupt */
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catpt_updatel_shim(cdev, IMC, CATPT_IMC_IPCCD, 0);
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ret = IRQ_HANDLED;
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}
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/* delayed reply or notification */
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if (isc & CATPT_ISC_IPCDB) {
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/* mask dsp BUSY interrupt */
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catpt_updatel_shim(cdev, IMC, CATPT_IMC_IPCDB, CATPT_IMC_IPCDB);
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ret = IRQ_WAKE_THREAD;
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}
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return ret;
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}
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