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-rw-r--r--sound/soc/intel/avs/utils.c324
1 files changed, 324 insertions, 0 deletions
diff --git a/sound/soc/intel/avs/utils.c b/sound/soc/intel/avs/utils.c
new file mode 100644
index 000000000..13611dee9
--- /dev/null
+++ b/sound/soc/intel/avs/utils.c
@@ -0,0 +1,324 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// Copyright(c) 2021-2022 Intel Corporation. All rights reserved.
+//
+// Authors: Cezary Rojewski <cezary.rojewski@intel.com>
+// Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
+//
+
+#include <linux/firmware.h>
+#include <linux/kfifo.h>
+#include <linux/slab.h>
+#include "avs.h"
+#include "messages.h"
+
+/* Caller responsible for holding adev->modres_mutex. */
+static int avs_module_entry_index(struct avs_dev *adev, const guid_t *uuid)
+{
+ int i;
+
+ for (i = 0; i < adev->mods_info->count; i++) {
+ struct avs_module_entry *module;
+
+ module = &adev->mods_info->entries[i];
+ if (guid_equal(&module->uuid, uuid))
+ return i;
+ }
+
+ return -ENOENT;
+}
+
+/* Caller responsible for holding adev->modres_mutex. */
+static int avs_module_id_entry_index(struct avs_dev *adev, u32 module_id)
+{
+ int i;
+
+ for (i = 0; i < adev->mods_info->count; i++) {
+ struct avs_module_entry *module;
+
+ module = &adev->mods_info->entries[i];
+ if (module->module_id == module_id)
+ return i;
+ }
+
+ return -ENOENT;
+}
+
+int avs_get_module_entry(struct avs_dev *adev, const guid_t *uuid, struct avs_module_entry *entry)
+{
+ int idx;
+
+ mutex_lock(&adev->modres_mutex);
+
+ idx = avs_module_entry_index(adev, uuid);
+ if (idx >= 0)
+ memcpy(entry, &adev->mods_info->entries[idx], sizeof(*entry));
+
+ mutex_unlock(&adev->modres_mutex);
+ return (idx < 0) ? idx : 0;
+}
+
+int avs_get_module_id_entry(struct avs_dev *adev, u32 module_id, struct avs_module_entry *entry)
+{
+ int idx;
+
+ mutex_lock(&adev->modres_mutex);
+
+ idx = avs_module_id_entry_index(adev, module_id);
+ if (idx >= 0)
+ memcpy(entry, &adev->mods_info->entries[idx], sizeof(*entry));
+
+ mutex_unlock(&adev->modres_mutex);
+ return (idx < 0) ? idx : 0;
+}
+
+int avs_get_module_id(struct avs_dev *adev, const guid_t *uuid)
+{
+ struct avs_module_entry module;
+ int ret;
+
+ ret = avs_get_module_entry(adev, uuid, &module);
+ return !ret ? module.module_id : -ENOENT;
+}
+
+bool avs_is_module_ida_empty(struct avs_dev *adev, u32 module_id)
+{
+ bool ret = false;
+ int idx;
+
+ mutex_lock(&adev->modres_mutex);
+
+ idx = avs_module_id_entry_index(adev, module_id);
+ if (idx >= 0)
+ ret = ida_is_empty(adev->mod_idas[idx]);
+
+ mutex_unlock(&adev->modres_mutex);
+ return ret;
+}
+
+/* Caller responsible for holding adev->modres_mutex. */
+static void avs_module_ida_destroy(struct avs_dev *adev)
+{
+ int i = adev->mods_info ? adev->mods_info->count : 0;
+
+ while (i--) {
+ ida_destroy(adev->mod_idas[i]);
+ kfree(adev->mod_idas[i]);
+ }
+ kfree(adev->mod_idas);
+}
+
+/* Caller responsible for holding adev->modres_mutex. */
+static int
+avs_module_ida_alloc(struct avs_dev *adev, struct avs_mods_info *newinfo, bool purge)
+{
+ struct avs_mods_info *oldinfo = adev->mods_info;
+ struct ida **ida_ptrs;
+ u32 tocopy_count = 0;
+ int i;
+
+ if (!purge && oldinfo) {
+ if (oldinfo->count >= newinfo->count)
+ dev_warn(adev->dev, "refreshing %d modules info with %d\n",
+ oldinfo->count, newinfo->count);
+ tocopy_count = oldinfo->count;
+ }
+
+ ida_ptrs = kcalloc(newinfo->count, sizeof(*ida_ptrs), GFP_KERNEL);
+ if (!ida_ptrs)
+ return -ENOMEM;
+
+ if (tocopy_count)
+ memcpy(ida_ptrs, adev->mod_idas, tocopy_count * sizeof(*ida_ptrs));
+
+ for (i = tocopy_count; i < newinfo->count; i++) {
+ ida_ptrs[i] = kzalloc(sizeof(**ida_ptrs), GFP_KERNEL);
+ if (!ida_ptrs[i]) {
+ while (i--)
+ kfree(ida_ptrs[i]);
+
+ kfree(ida_ptrs);
+ return -ENOMEM;
+ }
+
+ ida_init(ida_ptrs[i]);
+ }
+
+ /* If old elements have been reused, don't wipe them. */
+ if (tocopy_count)
+ kfree(adev->mod_idas);
+ else
+ avs_module_ida_destroy(adev);
+
+ adev->mod_idas = ida_ptrs;
+ return 0;
+}
+
+int avs_module_info_init(struct avs_dev *adev, bool purge)
+{
+ struct avs_mods_info *info;
+ int ret;
+
+ ret = avs_ipc_get_modules_info(adev, &info);
+ if (ret)
+ return AVS_IPC_RET(ret);
+
+ mutex_lock(&adev->modres_mutex);
+
+ ret = avs_module_ida_alloc(adev, info, purge);
+ if (ret < 0) {
+ dev_err(adev->dev, "initialize module idas failed: %d\n", ret);
+ goto exit;
+ }
+
+ /* Refresh current information with newly received table. */
+ kfree(adev->mods_info);
+ adev->mods_info = info;
+
+exit:
+ mutex_unlock(&adev->modres_mutex);
+ return ret;
+}
+
+void avs_module_info_free(struct avs_dev *adev)
+{
+ mutex_lock(&adev->modres_mutex);
+
+ avs_module_ida_destroy(adev);
+ kfree(adev->mods_info);
+ adev->mods_info = NULL;
+
+ mutex_unlock(&adev->modres_mutex);
+}
+
+int avs_module_id_alloc(struct avs_dev *adev, u16 module_id)
+{
+ int ret, idx, max_id;
+
+ mutex_lock(&adev->modres_mutex);
+
+ idx = avs_module_id_entry_index(adev, module_id);
+ if (idx == -ENOENT) {
+ dev_err(adev->dev, "invalid module id: %d", module_id);
+ ret = -EINVAL;
+ goto exit;
+ }
+ max_id = adev->mods_info->entries[idx].instance_max_count - 1;
+ ret = ida_alloc_max(adev->mod_idas[idx], max_id, GFP_KERNEL);
+exit:
+ mutex_unlock(&adev->modres_mutex);
+ return ret;
+}
+
+void avs_module_id_free(struct avs_dev *adev, u16 module_id, u8 instance_id)
+{
+ int idx;
+
+ mutex_lock(&adev->modres_mutex);
+
+ idx = avs_module_id_entry_index(adev, module_id);
+ if (idx == -ENOENT) {
+ dev_err(adev->dev, "invalid module id: %d", module_id);
+ goto exit;
+ }
+
+ ida_free(adev->mod_idas[idx], instance_id);
+exit:
+ mutex_unlock(&adev->modres_mutex);
+}
+
+/*
+ * Once driver loads FW it should keep it in memory, so we are not affected
+ * by FW removal from filesystem or even worse by loading different FW at
+ * runtime suspend/resume.
+ */
+int avs_request_firmware(struct avs_dev *adev, const struct firmware **fw_p, const char *name)
+{
+ struct avs_fw_entry *entry;
+ int ret;
+
+ /* first check in list if it is not already loaded */
+ list_for_each_entry(entry, &adev->fw_list, node) {
+ if (!strcmp(name, entry->name)) {
+ *fw_p = entry->fw;
+ return 0;
+ }
+ }
+
+ /* FW is not loaded, let's load it now and add to the list */
+ entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+ if (!entry)
+ return -ENOMEM;
+
+ entry->name = kstrdup(name, GFP_KERNEL);
+ if (!entry->name) {
+ kfree(entry);
+ return -ENOMEM;
+ }
+
+ ret = request_firmware(&entry->fw, name, adev->dev);
+ if (ret < 0) {
+ kfree(entry->name);
+ kfree(entry);
+ return ret;
+ }
+
+ *fw_p = entry->fw;
+
+ list_add_tail(&entry->node, &adev->fw_list);
+
+ return 0;
+}
+
+/*
+ * Release single FW entry, used to handle errors in functions calling
+ * avs_request_firmware()
+ */
+void avs_release_last_firmware(struct avs_dev *adev)
+{
+ struct avs_fw_entry *entry;
+
+ entry = list_last_entry(&adev->fw_list, typeof(*entry), node);
+
+ list_del(&entry->node);
+ release_firmware(entry->fw);
+ kfree(entry->name);
+ kfree(entry);
+}
+
+/*
+ * Release all FW entries, used on driver removal
+ */
+void avs_release_firmwares(struct avs_dev *adev)
+{
+ struct avs_fw_entry *entry, *tmp;
+
+ list_for_each_entry_safe(entry, tmp, &adev->fw_list, node) {
+ list_del(&entry->node);
+ release_firmware(entry->fw);
+ kfree(entry->name);
+ kfree(entry);
+ }
+}
+
+unsigned int __kfifo_fromio_locked(struct kfifo *fifo, const void __iomem *src, unsigned int len,
+ spinlock_t *lock)
+{
+ struct __kfifo *__fifo = &fifo->kfifo;
+ unsigned long flags;
+ unsigned int l, off;
+
+ spin_lock_irqsave(lock, flags);
+ len = min(len, kfifo_avail(fifo));
+ off = __fifo->in & __fifo->mask;
+ l = min(len, kfifo_size(fifo) - off);
+
+ memcpy_fromio(__fifo->data + off, src, l);
+ memcpy_fromio(__fifo->data, src + l, len - l);
+ /* Make sure data copied from SRAM is visible to all CPUs. */
+ smp_mb();
+ __fifo->in += len;
+ spin_unlock_irqrestore(lock, flags);
+
+ return len;
+}