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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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firmware: Reduce ifdef CONFIG_FW_LOADER_USER_HELPER
By shuffling the code, reduce a few ifdefs in firmware_class.c. Also, firmware_buf fmt field is changed to is_pages_buf boolean for simplification. Acked-by: Ming Lei <ming.lei@canonical.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Iwai
Greg Kroah-Hartman
parent
7b1269f778
commit
cd7239fab7
1 changed files with 166 additions and 177 deletions
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@ -88,13 +88,6 @@ enum {
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FW_STATUS_ABORT,
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};
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#ifdef CONFIG_FW_LOADER_USER_HELPER
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enum fw_buf_fmt {
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VMALLOC_BUF, /* used in direct loading */
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PAGE_BUF, /* used in loading via userspace */
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};
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#endif /* CONFIG_FW_LOADER_USER_HELPER */
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static int loading_timeout = 60; /* In seconds */
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static inline long firmware_loading_timeout(void)
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@ -133,7 +126,7 @@ struct firmware_buf {
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void *data;
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size_t size;
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#ifdef CONFIG_FW_LOADER_USER_HELPER
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enum fw_buf_fmt fmt;
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bool is_paged_buf;
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struct page **pages;
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int nr_pages;
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int page_array_size;
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@ -146,16 +139,6 @@ struct fw_cache_entry {
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char name[];
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};
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#ifdef CONFIG_FW_LOADER_USER_HELPER
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struct firmware_priv {
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struct delayed_work timeout_work;
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bool nowait;
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struct device dev;
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struct firmware_buf *buf;
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struct firmware *fw;
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};
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#endif
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struct fw_name_devm {
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unsigned long magic;
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char name[];
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@ -188,9 +171,6 @@ static struct firmware_buf *__allocate_fw_buf(const char *fw_name,
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strcpy(buf->fw_id, fw_name);
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buf->fwc = fwc;
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init_completion(&buf->completion);
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#ifdef CONFIG_FW_LOADER_USER_HELPER
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buf->fmt = VMALLOC_BUF;
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#endif
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pr_debug("%s: fw-%s buf=%p\n", __func__, fw_name, buf);
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@ -256,9 +236,8 @@ static void __fw_free_buf(struct kref *ref)
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list_del(&buf->list);
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spin_unlock(&fwc->lock);
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#ifdef CONFIG_FW_LOADER_USER_HELPER
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if (buf->fmt == PAGE_BUF) {
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if (buf->is_paged_buf) {
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int i;
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vunmap(buf->data);
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for (i = 0; i < buf->nr_pages; i++)
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@ -378,7 +357,89 @@ static void firmware_free_data(const struct firmware *fw)
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fw_free_buf(fw->priv);
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}
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/* store the pages buffer info firmware from buf */
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static void fw_set_page_data(struct firmware_buf *buf, struct firmware *fw)
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{
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fw->priv = buf;
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#ifdef CONFIG_FW_LOADER_USER_HELPER
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fw->pages = buf->pages;
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#endif
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fw->size = buf->size;
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fw->data = buf->data;
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pr_debug("%s: fw-%s buf=%p data=%p size=%u\n",
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__func__, buf->fw_id, buf, buf->data,
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(unsigned int)buf->size);
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}
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#ifdef CONFIG_PM_SLEEP
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static void fw_name_devm_release(struct device *dev, void *res)
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{
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struct fw_name_devm *fwn = res;
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if (fwn->magic == (unsigned long)&fw_cache)
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pr_debug("%s: fw_name-%s devm-%p released\n",
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__func__, fwn->name, res);
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}
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static int fw_devm_match(struct device *dev, void *res,
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void *match_data)
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{
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struct fw_name_devm *fwn = res;
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return (fwn->magic == (unsigned long)&fw_cache) &&
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!strcmp(fwn->name, match_data);
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}
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static struct fw_name_devm *fw_find_devm_name(struct device *dev,
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const char *name)
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{
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struct fw_name_devm *fwn;
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fwn = devres_find(dev, fw_name_devm_release,
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fw_devm_match, (void *)name);
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return fwn;
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}
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/* add firmware name into devres list */
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static int fw_add_devm_name(struct device *dev, const char *name)
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{
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struct fw_name_devm *fwn;
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fwn = fw_find_devm_name(dev, name);
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if (fwn)
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return 1;
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fwn = devres_alloc(fw_name_devm_release, sizeof(struct fw_name_devm) +
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strlen(name) + 1, GFP_KERNEL);
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if (!fwn)
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return -ENOMEM;
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fwn->magic = (unsigned long)&fw_cache;
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strcpy(fwn->name, name);
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devres_add(dev, fwn);
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return 0;
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}
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#else
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static int fw_add_devm_name(struct device *dev, const char *name)
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{
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return 0;
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}
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#endif
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/*
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* user-mode helper code
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*/
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#ifdef CONFIG_FW_LOADER_USER_HELPER
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struct firmware_priv {
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struct delayed_work timeout_work;
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bool nowait;
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struct device dev;
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struct firmware_buf *buf;
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struct firmware *fw;
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};
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static struct firmware_priv *to_firmware_priv(struct device *dev)
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{
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@ -477,7 +538,7 @@ static ssize_t firmware_loading_show(struct device *dev,
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/* one pages buffer should be mapped/unmapped only once */
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static int fw_map_pages_buf(struct firmware_buf *buf)
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{
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if (buf->fmt != PAGE_BUF)
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if (!buf->is_paged_buf)
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return 0;
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if (buf->data)
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@ -749,78 +810,89 @@ fw_create_instance(struct firmware *firmware, const char *fw_name,
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exit:
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return fw_priv;
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}
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/* load a firmware via user helper */
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static int _request_firmware_load(struct firmware_priv *fw_priv, bool uevent,
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long timeout)
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{
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int retval = 0;
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struct device *f_dev = &fw_priv->dev;
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struct firmware_buf *buf = fw_priv->buf;
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/* fall back on userspace loading */
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buf->is_paged_buf = true;
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dev_set_uevent_suppress(f_dev, true);
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/* Need to pin this module until class device is destroyed */
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__module_get(THIS_MODULE);
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retval = device_add(f_dev);
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if (retval) {
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dev_err(f_dev, "%s: device_register failed\n", __func__);
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goto err_put_dev;
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}
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retval = device_create_bin_file(f_dev, &firmware_attr_data);
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if (retval) {
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dev_err(f_dev, "%s: sysfs_create_bin_file failed\n", __func__);
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goto err_del_dev;
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}
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retval = device_create_file(f_dev, &dev_attr_loading);
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if (retval) {
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dev_err(f_dev, "%s: device_create_file failed\n", __func__);
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goto err_del_bin_attr;
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}
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if (uevent) {
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dev_set_uevent_suppress(f_dev, false);
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dev_dbg(f_dev, "firmware: requesting %s\n", buf->fw_id);
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if (timeout != MAX_SCHEDULE_TIMEOUT)
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schedule_delayed_work(&fw_priv->timeout_work, timeout);
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kobject_uevent(&fw_priv->dev.kobj, KOBJ_ADD);
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}
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wait_for_completion(&buf->completion);
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cancel_delayed_work_sync(&fw_priv->timeout_work);
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fw_priv->buf = NULL;
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device_remove_file(f_dev, &dev_attr_loading);
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err_del_bin_attr:
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device_remove_bin_file(f_dev, &firmware_attr_data);
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err_del_dev:
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device_del(f_dev);
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err_put_dev:
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put_device(f_dev);
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return retval;
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}
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static int fw_load_from_user_helper(struct firmware *firmware,
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const char *name, struct device *device,
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bool uevent, bool nowait, long timeout)
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{
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struct firmware_priv *fw_priv;
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fw_priv = fw_create_instance(firmware, name, device, uevent, nowait);
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if (IS_ERR(fw_priv))
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return PTR_ERR(fw_priv);
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fw_priv->buf = firmware->priv;
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return _request_firmware_load(fw_priv, uevent, timeout);
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}
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#else /* CONFIG_FW_LOADER_USER_HELPER */
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static inline int
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fw_load_from_user_helper(struct firmware *firmware, const char *name,
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struct device *device, bool uevent, bool nowait,
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long timeout)
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{
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return -ENOENT;
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}
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#endif /* CONFIG_FW_LOADER_USER_HELPER */
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/* store the pages buffer info firmware from buf */
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static void fw_set_page_data(struct firmware_buf *buf, struct firmware *fw)
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{
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fw->priv = buf;
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#ifdef CONFIG_FW_LOADER_USER_HELPER
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fw->pages = buf->pages;
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#endif
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fw->size = buf->size;
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fw->data = buf->data;
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pr_debug("%s: fw-%s buf=%p data=%p size=%u\n",
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__func__, buf->fw_id, buf, buf->data,
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(unsigned int)buf->size);
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}
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#ifdef CONFIG_PM_SLEEP
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static void fw_name_devm_release(struct device *dev, void *res)
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{
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struct fw_name_devm *fwn = res;
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if (fwn->magic == (unsigned long)&fw_cache)
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pr_debug("%s: fw_name-%s devm-%p released\n",
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__func__, fwn->name, res);
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}
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static int fw_devm_match(struct device *dev, void *res,
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void *match_data)
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{
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struct fw_name_devm *fwn = res;
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return (fwn->magic == (unsigned long)&fw_cache) &&
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!strcmp(fwn->name, match_data);
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}
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static struct fw_name_devm *fw_find_devm_name(struct device *dev,
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const char *name)
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{
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struct fw_name_devm *fwn;
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fwn = devres_find(dev, fw_name_devm_release,
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fw_devm_match, (void *)name);
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return fwn;
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}
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/* add firmware name into devres list */
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static int fw_add_devm_name(struct device *dev, const char *name)
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{
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struct fw_name_devm *fwn;
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fwn = fw_find_devm_name(dev, name);
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if (fwn)
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return 1;
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fwn = devres_alloc(fw_name_devm_release, sizeof(struct fw_name_devm) +
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strlen(name) + 1, GFP_KERNEL);
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if (!fwn)
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return -ENOMEM;
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fwn->magic = (unsigned long)&fw_cache;
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strcpy(fwn->name, name);
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devres_add(dev, fwn);
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return 0;
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}
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#else
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static int fw_add_devm_name(struct device *dev, const char *name)
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{
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return 0;
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}
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#endif
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/* wait until the shared firmware_buf becomes ready (or error) */
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static int sync_cached_firmware_buf(struct firmware_buf *buf)
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@ -921,89 +993,6 @@ static int assign_firmware_buf(struct firmware *fw, struct device *device)
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return 0;
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}
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#ifdef CONFIG_FW_LOADER_USER_HELPER
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/* load a firmware via user helper */
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static int _request_firmware_load(struct firmware_priv *fw_priv, bool uevent,
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long timeout)
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{
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int retval = 0;
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struct device *f_dev = &fw_priv->dev;
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struct firmware_buf *buf = fw_priv->buf;
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/* fall back on userspace loading */
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buf->fmt = PAGE_BUF;
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dev_set_uevent_suppress(f_dev, true);
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/* Need to pin this module until class device is destroyed */
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__module_get(THIS_MODULE);
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retval = device_add(f_dev);
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if (retval) {
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dev_err(f_dev, "%s: device_register failed\n", __func__);
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goto err_put_dev;
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}
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retval = device_create_bin_file(f_dev, &firmware_attr_data);
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if (retval) {
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dev_err(f_dev, "%s: sysfs_create_bin_file failed\n", __func__);
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goto err_del_dev;
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}
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retval = device_create_file(f_dev, &dev_attr_loading);
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if (retval) {
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dev_err(f_dev, "%s: device_create_file failed\n", __func__);
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goto err_del_bin_attr;
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}
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if (uevent) {
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dev_set_uevent_suppress(f_dev, false);
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dev_dbg(f_dev, "firmware: requesting %s\n", buf->fw_id);
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if (timeout != MAX_SCHEDULE_TIMEOUT)
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schedule_delayed_work(&fw_priv->timeout_work, timeout);
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kobject_uevent(&fw_priv->dev.kobj, KOBJ_ADD);
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}
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wait_for_completion(&buf->completion);
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cancel_delayed_work_sync(&fw_priv->timeout_work);
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fw_priv->buf = NULL;
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device_remove_file(f_dev, &dev_attr_loading);
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err_del_bin_attr:
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device_remove_bin_file(f_dev, &firmware_attr_data);
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err_del_dev:
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device_del(f_dev);
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err_put_dev:
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put_device(f_dev);
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return retval;
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}
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static int fw_load_from_user_helper(struct firmware *firmware,
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const char *name, struct device *device,
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bool uevent, bool nowait, long timeout)
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{
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struct firmware_priv *fw_priv;
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fw_priv = fw_create_instance(firmware, name, device, uevent, nowait);
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if (IS_ERR(fw_priv))
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return PTR_ERR(fw_priv);
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fw_priv->buf = firmware->priv;
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return _request_firmware_load(fw_priv, uevent, timeout);
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}
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#else /* CONFIG_FW_LOADER_USER_HELPER */
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static inline int
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fw_load_from_user_helper(struct firmware *firmware, const char *name,
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struct device *device, bool uevent, bool nowait,
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long timeout)
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{
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return -ENOENT;
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}
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#endif /* CONFIG_FW_LOADER_USER_HELPER */
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/* called from request_firmware() and request_firmware_work_func() */
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static int
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_request_firmware(const struct firmware **firmware_p, const char *name,
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