[PATCH v3 09/14] ASoC: SOF: Add firmware loader support

Pierre-Louis Bossart
2018-12-11T21:23:13Z

From: Liam Girdwood <liam.r.girdwood@linux.intel.com>

The firmware loader exports APIs that can be called by core to load and
process multiple different file formats.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
sound/soc/sof/loader.c | 322 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 322 insertions(+)
create mode 100644 sound/soc/sof/loader.c

diff --git a/sound/soc/sof/loader.c b/sound/soc/sof/loader.c
new file mode 100644
index 000000000000..dbadd8c521e6
--- /dev/null
+++ b/sound/soc/sof/loader.c
@@ -0,0 +1,322 @@
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+//
+// This file is provided under a dual BSD/GPLv2 license. When using or
+// redistributing this file, you may do so under either license.
+//
+// Copyright(c) 2018 Intel Corporation. All rights reserved.
+//
+// Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
+//
+// Generic firmware loader.
+//
+
+#include <linux/firmware.h>
+#include <sound/sof.h>
+#include "ops.h"
+
+static int get_ext_windows(struct snd_sof_dev *sdev,
+ struct sof_ipc_ext_data_hdr *ext_hdr)
+{
+ struct sof_ipc_window *w = (struct sof_ipc_window *)ext_hdr;
+
+ int ret = 0;
+ size_t size;
+
+ if (w->num_windows == 0 || w->num_windows > SOF_IPC_MAX_ELEMS)
+ return -EINVAL;
+
+ size = sizeof(*w) + sizeof(struct sof_ipc_window_elem) * w->num_windows;
+
+ /* keep a local copy of the data */
+ sdev->info_window = kmemdup(w, size, GFP_KERNEL);
+ if (!sdev->info_window)
+ return -ENOMEM;
+
+ return ret;
+}
+
+/* parse the extended FW boot data structures from FW boot message */
+int snd_sof_fw_parse_ext_data(struct snd_sof_dev *sdev, u32 offset)
+{
+ struct sof_ipc_ext_data_hdr *ext_hdr;
+ void *ext_data;
+ int ret = 0;
+
+ ext_data = kzalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!ext_data)
+ return -ENOMEM;
+
+ /* get first header */
+ snd_sof_dsp_block_read(sdev, offset, ext_data, sizeof(*ext_hdr));
+ ext_hdr = (struct sof_ipc_ext_data_hdr *)ext_data;
+
+ while (ext_hdr->hdr.cmd == SOF_IPC_FW_READY) {
+ /* read in ext structure */
+ offset += sizeof(*ext_hdr);
+ snd_sof_dsp_block_read(sdev, offset,
+ ext_data + sizeof(*ext_hdr),
+ ext_hdr->hdr.size - sizeof(*ext_hdr));
+
+ dev_dbg(sdev->dev, "found ext header type %d size 0x%x\n",
+ ext_hdr->type, ext_hdr->hdr.size);
+
+ /* process structure data */
+ switch (ext_hdr->type) {
+ case SOF_IPC_EXT_DMA_BUFFER:
+ break;
+ case SOF_IPC_EXT_WINDOW:
+ ret = get_ext_windows(sdev, ext_hdr);
+ break;
+ default:
+ break;
+ }
+
+ if (ret < 0) {
+ dev_err(sdev->dev, "error: failed to parse ext data type %d\n",
+ ext_hdr->type);
+ goto out;
+ }
+
+ /* move to next header */
+ offset += ext_hdr->hdr.size;
+ snd_sof_dsp_block_read(sdev, offset, ext_data,
+ sizeof(*ext_hdr));
+ ext_hdr = (struct sof_ipc_ext_data_hdr *)ext_data;
+ }
+out:
+ kfree(ext_data);
+ return ret;
+}
+EXPORT_SYMBOL(snd_sof_fw_parse_ext_data);
+
+/* generic module parser for mmaped DSPs */
+int snd_sof_parse_module_memcpy(struct snd_sof_dev *sdev,
+ struct snd_sof_mod_hdr *module)
+{
+ struct snd_sof_blk_hdr *block;
+ int count;
+ u32 offset;
+
+ dev_dbg(sdev->dev, "new module size 0x%x blocks 0x%x type 0x%x\n",
+ module->size, module->num_blocks, module->type);
+
+ block = (void *)module + sizeof(*module);
+
+ for (count = 0; count < module->num_blocks; count++) {
+ if (block->size == 0) {
+ dev_warn(sdev->dev,
+ "warning: block %d size zero\n", count);
+ dev_warn(sdev->dev, " type 0x%x offset 0x%x\n",
+ block->type, block->offset);
+ continue;
+ }
+
+ switch (block->type) {
+ case SOF_BLK_IMAGE:
+ case SOF_BLK_CACHE:
+ case SOF_BLK_REGS:
+ case SOF_BLK_SIG:
+ case SOF_BLK_ROM:
+ continue; /* not handled atm */
+ case SOF_BLK_TEXT:
+ case SOF_BLK_DATA:
+ offset = block->offset;
+ break;
+ default:
+ dev_err(sdev->dev, "error: bad type 0x%x for block 0x%x\n",
+ block->type, count);
+ return -EINVAL;
+ }
+
+ dev_dbg(sdev->dev,
+ "block %d type 0x%x size 0x%x ==> offset 0x%x\n",
+ count, block->type, block->size, offset);
+
+ snd_sof_dsp_block_write(sdev, offset,
+ (void *)block + sizeof(*block),
+ block->size);
+
+ /* next block */
+ block = (void *)block + sizeof(*block) + block->size;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(snd_sof_parse_module_memcpy);
+
+static int check_header(struct snd_sof_dev *sdev, const struct firmware *fw)
+{
+ struct snd_sof_fw_header *header;
+
+ /* Read the header information from the data pointer */
+ header = (struct snd_sof_fw_header *)fw->data;
+
+ /* verify FW sig */
+ if (strncmp(header->sig, SND_SOF_FW_SIG, SND_SOF_FW_SIG_SIZE) != 0) {
+ dev_err(sdev->dev, "error: invalid firmware signature\n");
+ return -EINVAL;
+ }
+
+ /* check size is valid */
+ if (fw->size != header->file_size + sizeof(*header)) {
+ dev_err(sdev->dev, "error: invalid filesize mismatch got 0x%zx expected 0x%zx\n",
+ fw->size, header->file_size + sizeof(*header));
+ return -EINVAL;
+ }
+
+ dev_dbg(sdev->dev, "header size=0x%x modules=0x%x abi=0x%x size=%zu\n",
+ header->file_size, header->num_modules,
+ header->abi, sizeof(*header));
+
+ return 0;
+}
+
+static int load_modules(struct snd_sof_dev *sdev, const struct firmware *fw)
+{
+ struct snd_sof_fw_header *header;
+ struct snd_sof_mod_hdr *module;
+ int (*load_module)(struct snd_sof_dev *sof_dev,
+ struct snd_sof_mod_hdr *hdr);
+ int ret, count;
+
+ header = (struct snd_sof_fw_header *)fw->data;
+ load_module = sdev->ops->load_module;
+ if (!load_module)
+ return -EINVAL;
+
+ /* parse each module */
+ module = (void *)fw->data + sizeof(*header);
+ for (count = 0; count < header->num_modules; count++) {
+ /* module */
+ ret = load_module(sdev, module);
+ if (ret < 0) {
+ dev_err(sdev->dev, "error: invalid module %d\n", count);
+ return ret;
+ }
+ module = (void *)module + sizeof(*module) + module->size;
+ }
+
+ return 0;
+}
+
+int snd_sof_load_firmware_memcpy(struct snd_sof_dev *sdev)
+{
+ struct snd_sof_pdata *plat_data = dev_get_platdata(sdev->dev);
+ const char *fw_filename;
+ int ret;
+
+ /* set code loading condition to true */
+ sdev->code_loading = 1;
+ fw_filename = plat_data->machine->sof_fw_filename;
+
+ ret = request_firmware(&plat_data->fw, fw_filename, sdev->dev);
+
+ if (ret < 0) {
+ dev_err(sdev->dev, "error: request firmware failed err: %d\n",
+ ret);
+ return ret;
+ }
+
+ /* make sure the FW header and file is valid */
+ ret = check_header(sdev, plat_data->fw);
+ if (ret < 0) {
+ dev_err(sdev->dev, "error: invalid FW header\n");
+ goto error;
+ }
+
+ /* prepare the DSP for FW loading */
+ ret = snd_sof_dsp_reset(sdev);
+ if (ret < 0) {
+ dev_err(sdev->dev, "error: failed to reset DSP\n");
+ goto error;
+ }
+
+ /* parse and load firmware modules to DSP */
+ ret = load_modules(sdev, plat_data->fw);
+ if (ret < 0) {
+ dev_err(sdev->dev, "error: invalid FW modules\n");
+ goto error;
+ }
+
+ return 0;
+
+error:
+ release_firmware(plat_data->fw);
+ return ret;
+
+}
+EXPORT_SYMBOL(snd_sof_load_firmware_memcpy);
+
+int snd_sof_load_firmware(struct snd_sof_dev *sdev)
+{
+ dev_dbg(sdev->dev, "loading firmware\n");
+
+ if (sdev->ops->load_firmware)
+ return sdev->ops->load_firmware(sdev);
+ return 0;
+}
+EXPORT_SYMBOL(snd_sof_load_firmware);
+
+int snd_sof_run_firmware(struct snd_sof_dev *sdev)
+{
+ int ret;
+
+ init_waitqueue_head(&sdev->boot_wait);
+ sdev->boot_complete = false;
+
+ /* create fw_version debugfs to store boot version info */
+ if (sdev->first_boot) {
+ ret = snd_sof_debugfs_buf_create_item(sdev, &sdev->fw_version,
+ sizeof(sdev->fw_version),
+ "fw_version");
+
+ if (ret < 0) {
+ dev_err(sdev->dev, "error: cannot create debugfs for fw_version\n");
+ return ret;
+ }
+ }
+
+ /* perform pre fw run operations */
+ ret = snd_sof_dsp_pre_fw_run(sdev);
+ if (ret < 0) {
+ dev_err(sdev->dev, "error: failed pre fw run op\n");
+ return ret;
+ }
+
+ dev_dbg(sdev->dev, "booting DSP firmware\n");
+
+ /* boot the firmware on the DSP */
+ ret = snd_sof_dsp_run(sdev);
+ if (ret < 0) {
+ dev_err(sdev->dev, "error: failed to reset DSP\n");
+ return ret;
+ }
+
+ /* now wait for the DSP to boot */
+ ret = wait_event_timeout(sdev->boot_wait, sdev->boot_complete,
+ msecs_to_jiffies(sdev->boot_timeout));
+ if (ret == 0) {
+ dev_err(sdev->dev, "error: firmware boot timeout\n");
+ snd_sof_dsp_dbg_dump(sdev, SOF_DBG_REGS | SOF_DBG_MBOX |
+ SOF_DBG_TEXT | SOF_DBG_PCI);
+ return -EIO;
+ }
+
+ dev_info(sdev->dev, "firmware boot complete\n");
+
+ /* perform post fw run operations */
+ ret = snd_sof_dsp_post_fw_run(sdev);
+ if (ret < 0) {
+ dev_err(sdev->dev, "error: failed post fw run op\n");
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(snd_sof_run_firmware);
+
+void snd_sof_fw_unload(struct snd_sof_dev *sdev)
+{
+ /* TODO: support module unloading at runtime */
+}
+EXPORT_SYMBOL(snd_sof_fw_unload);
--
2.17.1