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drivers/base/firmware_class.c
17.2 KB
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/* * firmware_class.c - Multi purpose firmware loading support * |
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* Copyright (c) 2003 Manuel Estrada Sainz |
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* * Please see Documentation/firmware_class/ for more information. * */ |
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#include <linux/capability.h> |
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#include <linux/device.h> #include <linux/module.h> #include <linux/init.h> #include <linux/timer.h> #include <linux/vmalloc.h> #include <linux/interrupt.h> #include <linux/bitops.h> |
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#include <linux/mutex.h> |
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#include <linux/kthread.h> |
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#include <linux/highmem.h> |
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#include <linux/firmware.h> |
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#include <linux/slab.h> |
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|
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#define to_dev(obj) container_of(obj, struct device, kobj) |
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MODULE_AUTHOR("Manuel Estrada Sainz"); |
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MODULE_DESCRIPTION("Multi purpose firmware loading support"); MODULE_LICENSE("GPL"); |
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/* Builtin firmware support */ #ifdef CONFIG_FW_LOADER extern struct builtin_fw __start_builtin_fw[]; extern struct builtin_fw __end_builtin_fw[]; static bool fw_get_builtin_firmware(struct firmware *fw, const char *name) { struct builtin_fw *b_fw; for (b_fw = __start_builtin_fw; b_fw != __end_builtin_fw; b_fw++) { if (strcmp(name, b_fw->name) == 0) { fw->size = b_fw->size; fw->data = b_fw->data; return true; } } return false; } static bool fw_is_builtin_firmware(const struct firmware *fw) { struct builtin_fw *b_fw; for (b_fw = __start_builtin_fw; b_fw != __end_builtin_fw; b_fw++) if (fw->data == b_fw->data) return true; return false; } #else /* Module case - no builtin firmware support */ static inline bool fw_get_builtin_firmware(struct firmware *fw, const char *name) { return false; } static inline bool fw_is_builtin_firmware(const struct firmware *fw) { return false; } #endif |
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enum { FW_STATUS_LOADING, FW_STATUS_DONE, FW_STATUS_ABORT, |
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}; |
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static int loading_timeout = 60; /* In seconds */ |
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/* fw_lock could be moved to 'struct firmware_priv' but since it is just * guarding for corner cases a global lock should be OK */ |
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static DEFINE_MUTEX(fw_lock); |
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struct firmware_priv { |
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struct completion completion; |
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struct firmware *fw; unsigned long status; |
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struct page **pages; int nr_pages; int page_array_size; |
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struct timer_list timeout; |
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struct device dev; |
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bool nowait; |
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char fw_id[]; |
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}; |
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static struct firmware_priv *to_firmware_priv(struct device *dev) { return container_of(dev, struct firmware_priv, dev); } static void fw_load_abort(struct firmware_priv *fw_priv) |
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{ set_bit(FW_STATUS_ABORT, &fw_priv->status); wmb(); complete(&fw_priv->completion); } |
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static ssize_t firmware_timeout_show(struct class *class, struct class_attribute *attr, char *buf) |
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{ return sprintf(buf, "%d ", loading_timeout); } /** |
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* firmware_timeout_store - set number of seconds to wait for firmware * @class: device class pointer |
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* @attr: device attribute pointer |
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* @buf: buffer to scan for timeout value * @count: number of bytes in @buf * |
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* Sets the number of seconds to wait for the firmware. Once |
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* this expires an error will be returned to the driver and no |
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* firmware will be provided. * |
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* Note: zero means 'wait forever'. |
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**/ |
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static ssize_t firmware_timeout_store(struct class *class, struct class_attribute *attr, const char *buf, size_t count) |
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{ loading_timeout = simple_strtol(buf, NULL, 10); |
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if (loading_timeout < 0) loading_timeout = 0; |
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|
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return count; } |
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static struct class_attribute firmware_class_attrs[] = { __ATTR(timeout, S_IWUSR | S_IRUGO, firmware_timeout_show, firmware_timeout_store), __ATTR_NULL }; |
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|
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static void fw_dev_release(struct device *dev) { |
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struct firmware_priv *fw_priv = to_firmware_priv(dev); |
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int i; for (i = 0; i < fw_priv->nr_pages; i++) __free_page(fw_priv->pages[i]); kfree(fw_priv->pages); |
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kfree(fw_priv); |
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module_put(THIS_MODULE); } |
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|
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static int firmware_uevent(struct device *dev, struct kobj_uevent_env *env) |
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{ |
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struct firmware_priv *fw_priv = to_firmware_priv(dev); |
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|
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if (add_uevent_var(env, "FIRMWARE=%s", fw_priv->fw_id)) |
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return -ENOMEM; |
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if (add_uevent_var(env, "TIMEOUT=%i", loading_timeout)) |
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return -ENOMEM; |
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if (add_uevent_var(env, "ASYNC=%d", fw_priv->nowait)) return -ENOMEM; |
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return 0; } |
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static struct class firmware_class = { .name = "firmware", |
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.class_attrs = firmware_class_attrs, |
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.dev_uevent = firmware_uevent, .dev_release = fw_dev_release, |
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}; |
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static ssize_t firmware_loading_show(struct device *dev, struct device_attribute *attr, char *buf) |
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{ |
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struct firmware_priv *fw_priv = to_firmware_priv(dev); |
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int loading = test_bit(FW_STATUS_LOADING, &fw_priv->status); |
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|
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return sprintf(buf, "%d ", loading); } |
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static void firmware_free_data(const struct firmware *fw) { int i; vunmap(fw->data); if (fw->pages) { for (i = 0; i < PFN_UP(fw->size); i++) __free_page(fw->pages[i]); kfree(fw->pages); } } |
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/* Some architectures don't have PAGE_KERNEL_RO */ #ifndef PAGE_KERNEL_RO #define PAGE_KERNEL_RO PAGE_KERNEL #endif |
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/** |
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* firmware_loading_store - set value in the 'loading' control file |
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* @dev: device pointer |
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* @attr: device attribute pointer |
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* @buf: buffer to scan for loading control value * @count: number of bytes in @buf * |
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* The relevant values are: * * 1: Start a load, discarding any previous partial load. |
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* 0: Conclude the load and hand the data to the driver code. |
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* -1: Conclude the load with an error and discard any written data. **/ |
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static ssize_t firmware_loading_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
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{ |
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struct firmware_priv *fw_priv = to_firmware_priv(dev); |
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int loading = simple_strtol(buf, NULL, 10); |
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int i; |
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|
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mutex_lock(&fw_lock); if (!fw_priv->fw) goto out; |
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switch (loading) { case 1: |
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firmware_free_data(fw_priv->fw); memset(fw_priv->fw, 0, sizeof(struct firmware)); /* If the pages are not owned by 'struct firmware' */ |
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for (i = 0; i < fw_priv->nr_pages; i++) __free_page(fw_priv->pages[i]); kfree(fw_priv->pages); fw_priv->pages = NULL; fw_priv->page_array_size = 0; fw_priv->nr_pages = 0; |
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set_bit(FW_STATUS_LOADING, &fw_priv->status); |
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break; case 0: if (test_bit(FW_STATUS_LOADING, &fw_priv->status)) { |
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vunmap(fw_priv->fw->data); |
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fw_priv->fw->data = vmap(fw_priv->pages, fw_priv->nr_pages, 0, PAGE_KERNEL_RO); if (!fw_priv->fw->data) { dev_err(dev, "%s: vmap() failed ", __func__); goto err; } |
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/* Pages are now owned by 'struct firmware' */ fw_priv->fw->pages = fw_priv->pages; fw_priv->pages = NULL; |
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fw_priv->page_array_size = 0; fw_priv->nr_pages = 0; |
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complete(&fw_priv->completion); clear_bit(FW_STATUS_LOADING, &fw_priv->status); break; } /* fallthrough */ default: |
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dev_err(dev, "%s: unexpected value (%d) ", __func__, loading); |
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/* fallthrough */ case -1: |
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err: |
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fw_load_abort(fw_priv); break; } |
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out: mutex_unlock(&fw_lock); |
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return count; } |
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static DEVICE_ATTR(loading, 0644, firmware_loading_show, firmware_loading_store); |
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|
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static ssize_t firmware_data_read(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buffer, loff_t offset, size_t count) |
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{ |
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struct device *dev = to_dev(kobj); |
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struct firmware_priv *fw_priv = to_firmware_priv(dev); |
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struct firmware *fw; |
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ssize_t ret_count; |
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|
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mutex_lock(&fw_lock); |
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fw = fw_priv->fw; |
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if (!fw || test_bit(FW_STATUS_DONE, &fw_priv->status)) { |
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ret_count = -ENODEV; goto out; } |
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if (offset > fw->size) { ret_count = 0; goto out; } |
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if (count > fw->size - offset) count = fw->size - offset; ret_count = count; while (count) { void *page_data; int page_nr = offset >> PAGE_SHIFT; int page_ofs = offset & (PAGE_SIZE-1); int page_cnt = min_t(size_t, PAGE_SIZE - page_ofs, count); page_data = kmap(fw_priv->pages[page_nr]); memcpy(buffer, page_data + page_ofs, page_cnt); kunmap(fw_priv->pages[page_nr]); buffer += page_cnt; offset += page_cnt; count -= page_cnt; } |
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out: |
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mutex_unlock(&fw_lock); |
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return ret_count; } |
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|
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static int fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size) |
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{ |
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int pages_needed = ALIGN(min_size, PAGE_SIZE) >> PAGE_SHIFT; /* If the array of pages is too small, grow it... */ if (fw_priv->page_array_size < pages_needed) { int new_array_size = max(pages_needed, fw_priv->page_array_size * 2); struct page **new_pages; new_pages = kmalloc(new_array_size * sizeof(void *), GFP_KERNEL); if (!new_pages) { fw_load_abort(fw_priv); return -ENOMEM; } memcpy(new_pages, fw_priv->pages, fw_priv->page_array_size * sizeof(void *)); memset(&new_pages[fw_priv->page_array_size], 0, sizeof(void *) * (new_array_size - fw_priv->page_array_size)); kfree(fw_priv->pages); fw_priv->pages = new_pages; fw_priv->page_array_size = new_array_size; } |
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|
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while (fw_priv->nr_pages < pages_needed) { fw_priv->pages[fw_priv->nr_pages] = alloc_page(GFP_KERNEL | __GFP_HIGHMEM); |
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|
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if (!fw_priv->pages[fw_priv->nr_pages]) { fw_load_abort(fw_priv); return -ENOMEM; } fw_priv->nr_pages++; |
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} |
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return 0; } /** |
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* firmware_data_write - write method for firmware |
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* @filp: open sysfs file |
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* @kobj: kobject for the device |
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* @bin_attr: bin_attr structure |
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* @buffer: buffer being written * @offset: buffer offset for write in total data store area * @count: buffer size |
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* |
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* Data written to the 'data' attribute will be later handed to |
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* the driver as a firmware image. **/ |
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static ssize_t firmware_data_write(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buffer, loff_t offset, size_t count) |
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{ |
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struct device *dev = to_dev(kobj); |
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struct firmware_priv *fw_priv = to_firmware_priv(dev); |
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struct firmware *fw; ssize_t retval; if (!capable(CAP_SYS_RAWIO)) return -EPERM; |
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|
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mutex_lock(&fw_lock); |
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fw = fw_priv->fw; |
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if (!fw || test_bit(FW_STATUS_DONE, &fw_priv->status)) { |
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retval = -ENODEV; goto out; } retval = fw_realloc_buffer(fw_priv, offset + count); if (retval) goto out; |
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retval = count; |
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while (count) { void *page_data; int page_nr = offset >> PAGE_SHIFT; int page_ofs = offset & (PAGE_SIZE - 1); int page_cnt = min_t(size_t, PAGE_SIZE - page_ofs, count); page_data = kmap(fw_priv->pages[page_nr]); memcpy(page_data + page_ofs, buffer, page_cnt); kunmap(fw_priv->pages[page_nr]); buffer += page_cnt; offset += page_cnt; count -= page_cnt; } fw->size = max_t(size_t, offset, fw->size); |
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out: |
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mutex_unlock(&fw_lock); |
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return retval; } |
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static struct bin_attribute firmware_attr_data = { .attr = { .name = "data", .mode = 0644 }, |
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.size = 0, .read = firmware_data_read, .write = firmware_data_write, }; |
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static void firmware_class_timeout(u_long data) |
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{ struct firmware_priv *fw_priv = (struct firmware_priv *) data; |
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|
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fw_load_abort(fw_priv); } |
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static struct firmware_priv * fw_create_instance(struct firmware *firmware, const char *fw_name, struct device *device, bool uevent, bool nowait) |
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{ |
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struct firmware_priv *fw_priv; struct device *f_dev; int error; |
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fw_priv = kzalloc(sizeof(*fw_priv) + strlen(fw_name) + 1 , GFP_KERNEL); if (!fw_priv) { |
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dev_err(device, "%s: kmalloc failed ", __func__); |
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error = -ENOMEM; goto err_out; |
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} |
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fw_priv->fw = firmware; fw_priv->nowait = nowait; |
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strcpy(fw_priv->fw_id, fw_name); |
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init_completion(&fw_priv->completion); |
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setup_timer(&fw_priv->timeout, firmware_class_timeout, (u_long) fw_priv); |
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f_dev = &fw_priv->dev; device_initialize(f_dev); |
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dev_set_name(f_dev, "%s", dev_name(device)); |
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f_dev->parent = device; f_dev->class = &firmware_class; |
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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 */ __module_get(THIS_MODULE); |
f8a4bd345 firmware loader: ... |
457 458 459 460 461 462 |
error = device_add(f_dev); if (error) { dev_err(device, "%s: device_register failed ", __func__); goto err_put_dev; } |
e9045f917 firmware class: e... |
463 |
|
f8a4bd345 firmware loader: ... |
464 465 |
error = device_create_bin_file(f_dev, &firmware_attr_data); if (error) { |
266a813c0 firmware: use dev... |
466 467 |
dev_err(device, "%s: sysfs_create_bin_file failed ", __func__); |
f8a4bd345 firmware loader: ... |
468 |
goto err_del_dev; |
1da177e4c Linux-2.6.12-rc2 |
469 |
} |
f8a4bd345 firmware loader: ... |
470 471 |
error = device_create_file(f_dev, &dev_attr_loading); if (error) { |
266a813c0 firmware: use dev... |
472 473 |
dev_err(device, "%s: device_create_file failed ", __func__); |
f8a4bd345 firmware loader: ... |
474 |
goto err_del_bin_attr; |
1da177e4c Linux-2.6.12-rc2 |
475 |
} |
312c004d3 [PATCH] driver co... |
476 |
if (uevent) |
f8a4bd345 firmware loader: ... |
477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 |
dev_set_uevent_suppress(f_dev, false); return fw_priv; err_del_bin_attr: device_remove_bin_file(f_dev, &firmware_attr_data); err_del_dev: device_del(f_dev); err_put_dev: put_device(f_dev); err_out: return ERR_PTR(error); } static void fw_destroy_instance(struct firmware_priv *fw_priv) { struct device *f_dev = &fw_priv->dev; |
1da177e4c Linux-2.6.12-rc2 |
494 |
|
f8a4bd345 firmware loader: ... |
495 496 |
device_remove_file(f_dev, &dev_attr_loading); device_remove_bin_file(f_dev, &firmware_attr_data); |
e55c8790d Driver core: conv... |
497 |
device_unregister(f_dev); |
1da177e4c Linux-2.6.12-rc2 |
498 |
} |
f8a4bd345 firmware loader: ... |
499 500 501 |
static int _request_firmware(const struct firmware **firmware_p, const char *name, struct device *device, bool uevent, bool nowait) |
1da177e4c Linux-2.6.12-rc2 |
502 |
{ |
1da177e4c Linux-2.6.12-rc2 |
503 504 |
struct firmware_priv *fw_priv; struct firmware *firmware; |
f8a4bd345 firmware loader: ... |
505 |
int retval = 0; |
1da177e4c Linux-2.6.12-rc2 |
506 507 508 |
if (!firmware_p) return -EINVAL; |
4aed0644d [PATCH] drivers/b... |
509 |
*firmware_p = firmware = kzalloc(sizeof(*firmware), GFP_KERNEL); |
1da177e4c Linux-2.6.12-rc2 |
510 |
if (!firmware) { |
266a813c0 firmware: use dev... |
511 512 513 |
dev_err(device, "%s: kmalloc(struct firmware) failed ", __func__); |
1da177e4c Linux-2.6.12-rc2 |
514 515 516 |
retval = -ENOMEM; goto out; } |
1da177e4c Linux-2.6.12-rc2 |
517 |
|
bcb9bd18e firmware loader: ... |
518 |
if (fw_get_builtin_firmware(firmware, name)) { |
6f18ff91d Driver core: Redu... |
519 520 |
dev_dbg(device, "firmware: using built-in firmware %s ", name); |
5658c7694 firmware: allow f... |
521 522 |
return 0; } |
b298d289c PM / Sleep: Fix f... |
523 |
read_lock_usermodehelper(); |
caca9510f firmware loader: ... |
524 525 526 527 528 529 |
if (WARN_ON(usermodehelper_is_disabled())) { dev_err(device, "firmware: %s will not be loaded ", name); retval = -EBUSY; goto out; } |
5658c7694 firmware: allow f... |
530 |
if (uevent) |
6f18ff91d Driver core: Redu... |
531 532 |
dev_dbg(device, "firmware: requesting %s ", name); |
5658c7694 firmware: allow f... |
533 |
|
f8a4bd345 firmware loader: ... |
534 535 536 537 538 |
fw_priv = fw_create_instance(firmware, name, device, uevent, nowait); if (IS_ERR(fw_priv)) { retval = PTR_ERR(fw_priv); goto out; } |
1da177e4c Linux-2.6.12-rc2 |
539 |
|
312c004d3 [PATCH] driver co... |
540 |
if (uevent) { |
f8a4bd345 firmware loader: ... |
541 542 543 544 545 546 547 548 549 |
if (loading_timeout > 0) mod_timer(&fw_priv->timeout, round_jiffies_up(jiffies + loading_timeout * HZ)); kobject_uevent(&fw_priv->dev.kobj, KOBJ_ADD); } wait_for_completion(&fw_priv->completion); |
1da177e4c Linux-2.6.12-rc2 |
550 |
|
f8a4bd345 firmware loader: ... |
551 552 |
set_bit(FW_STATUS_DONE, &fw_priv->status); del_timer_sync(&fw_priv->timeout); |
1da177e4c Linux-2.6.12-rc2 |
553 |
|
cad1e55d4 [PATCH] firmware_... |
554 |
mutex_lock(&fw_lock); |
f8a4bd345 firmware loader: ... |
555 |
if (!fw_priv->fw->size || test_bit(FW_STATUS_ABORT, &fw_priv->status)) |
1da177e4c Linux-2.6.12-rc2 |
556 |
retval = -ENOENT; |
1da177e4c Linux-2.6.12-rc2 |
557 |
fw_priv->fw = NULL; |
cad1e55d4 [PATCH] firmware_... |
558 |
mutex_unlock(&fw_lock); |
1da177e4c Linux-2.6.12-rc2 |
559 |
|
f8a4bd345 firmware loader: ... |
560 |
fw_destroy_instance(fw_priv); |
1da177e4c Linux-2.6.12-rc2 |
561 |
out: |
b298d289c PM / Sleep: Fix f... |
562 |
read_unlock_usermodehelper(); |
f8a4bd345 firmware loader: ... |
563 564 |
if (retval) { release_firmware(firmware); |
f45f3c1f3 firmware_class: f... |
565 |
*firmware_p = NULL; |
f8a4bd345 firmware loader: ... |
566 |
} |
1da177e4c Linux-2.6.12-rc2 |
567 568 569 570 |
return retval; } /** |
312c004d3 [PATCH] driver co... |
571 |
* request_firmware: - send firmware request and wait for it |
eb8e31799 [PATCH] firmware:... |
572 573 574 575 576 |
* @firmware_p: pointer to firmware image * @name: name of firmware file * @device: device for which firmware is being loaded * * @firmware_p will be used to return a firmware image by the name |
6e3eaab02 [PATCH] modified ... |
577 578 579 580 |
* of @name for device @device. * * Should be called from user context where sleeping is allowed. * |
312c004d3 [PATCH] driver co... |
581 |
* @name will be used as $FIRMWARE in the uevent environment and |
6e3eaab02 [PATCH] modified ... |
582 583 584 585 586 587 588 |
* should be distinctive enough not to be confused with any other * firmware image for this or any other device. **/ int request_firmware(const struct firmware **firmware_p, const char *name, struct device *device) { |
072fc8f0a firmware_classs: ... |
589 |
return _request_firmware(firmware_p, name, device, true, false); |
6e3eaab02 [PATCH] modified ... |
590 591 592 |
} /** |
1da177e4c Linux-2.6.12-rc2 |
593 |
* release_firmware: - release the resource associated with a firmware image |
eb8e31799 [PATCH] firmware:... |
594 |
* @fw: firmware resource to release |
1da177e4c Linux-2.6.12-rc2 |
595 |
**/ |
bcb9bd18e firmware loader: ... |
596 |
void release_firmware(const struct firmware *fw) |
1da177e4c Linux-2.6.12-rc2 |
597 598 |
{ if (fw) { |
bcb9bd18e firmware loader: ... |
599 600 |
if (!fw_is_builtin_firmware(fw)) firmware_free_data(fw); |
1da177e4c Linux-2.6.12-rc2 |
601 602 603 |
kfree(fw); } } |
1da177e4c Linux-2.6.12-rc2 |
604 605 606 607 608 609 610 611 |
/* Async support */ struct firmware_work { struct work_struct work; struct module *module; const char *name; struct device *device; void *context; void (*cont)(const struct firmware *fw, void *context); |
072fc8f0a firmware_classs: ... |
612 |
bool uevent; |
1da177e4c Linux-2.6.12-rc2 |
613 |
}; |
f8a4bd345 firmware loader: ... |
614 |
static int request_firmware_work_func(void *arg) |
1da177e4c Linux-2.6.12-rc2 |
615 616 617 |
{ struct firmware_work *fw_work = arg; const struct firmware *fw; |
113fab138 [PATCH] fix leaks... |
618 |
int ret; |
f8a4bd345 firmware loader: ... |
619 |
|
1da177e4c Linux-2.6.12-rc2 |
620 621 622 623 |
if (!arg) { WARN_ON(1); return 0; } |
9ebfbd45f firmware_class: m... |
624 |
|
f8a4bd345 firmware loader: ... |
625 626 |
ret = _request_firmware(&fw, fw_work->name, fw_work->device, fw_work->uevent, true); |
9ebfbd45f firmware_class: m... |
627 |
fw_work->cont(fw, fw_work->context); |
1da177e4c Linux-2.6.12-rc2 |
628 629 |
module_put(fw_work->module); kfree(fw_work); |
f8a4bd345 firmware loader: ... |
630 |
|
113fab138 [PATCH] fix leaks... |
631 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
632 633 634 |
} /** |
3c31f07ad Driver core: Fix ... |
635 |
* request_firmware_nowait - asynchronous version of request_firmware |
eb8e31799 [PATCH] firmware:... |
636 |
* @module: module requesting the firmware |
312c004d3 [PATCH] driver co... |
637 |
* @uevent: sends uevent to copy the firmware image if this flag |
eb8e31799 [PATCH] firmware:... |
638 639 640 |
* is non-zero else the firmware copy must be done manually. * @name: name of firmware file * @device: device for which firmware is being loaded |
9ebfbd45f firmware_class: m... |
641 |
* @gfp: allocation flags |
eb8e31799 [PATCH] firmware:... |
642 643 644 645 |
* @context: will be passed over to @cont, and * @fw may be %NULL if firmware request fails. * @cont: function will be called asynchronously when the firmware * request is over. |
1da177e4c Linux-2.6.12-rc2 |
646 |
* |
7fcab0997 driver core: fix ... |
647 648 649 |
* Asynchronous variant of request_firmware() for user contexts where * it is not possible to sleep for long time. It can't be called * in atomic contexts. |
1da177e4c Linux-2.6.12-rc2 |
650 651 652 |
**/ int request_firmware_nowait( |
072fc8f0a firmware_classs: ... |
653 |
struct module *module, bool uevent, |
9ebfbd45f firmware_class: m... |
654 |
const char *name, struct device *device, gfp_t gfp, void *context, |
1da177e4c Linux-2.6.12-rc2 |
655 656 |
void (*cont)(const struct firmware *fw, void *context)) { |
563d07570 [PATCH] kthread: ... |
657 |
struct task_struct *task; |
f8a4bd345 firmware loader: ... |
658 |
struct firmware_work *fw_work; |
1da177e4c Linux-2.6.12-rc2 |
659 |
|
f8a4bd345 firmware loader: ... |
660 |
fw_work = kzalloc(sizeof (struct firmware_work), gfp); |
1da177e4c Linux-2.6.12-rc2 |
661 662 |
if (!fw_work) return -ENOMEM; |
f8a4bd345 firmware loader: ... |
663 664 665 666 667 668 669 |
fw_work->module = module; fw_work->name = name; fw_work->device = device; fw_work->context = context; fw_work->cont = cont; fw_work->uevent = uevent; |
1da177e4c Linux-2.6.12-rc2 |
670 671 672 673 |
if (!try_module_get(module)) { kfree(fw_work); return -EFAULT; } |
563d07570 [PATCH] kthread: ... |
674 675 |
task = kthread_run(request_firmware_work_func, fw_work, "firmware/%s", name); |
563d07570 [PATCH] kthread: ... |
676 |
if (IS_ERR(task)) { |
1da177e4c Linux-2.6.12-rc2 |
677 |
fw_work->cont(NULL, fw_work->context); |
113fab138 [PATCH] fix leaks... |
678 679 |
module_put(fw_work->module); kfree(fw_work); |
563d07570 [PATCH] kthread: ... |
680 |
return PTR_ERR(task); |
1da177e4c Linux-2.6.12-rc2 |
681 |
} |
f8a4bd345 firmware loader: ... |
682 |
|
1da177e4c Linux-2.6.12-rc2 |
683 684 |
return 0; } |
673fae90d firmware loader: ... |
685 |
static int __init firmware_class_init(void) |
1da177e4c Linux-2.6.12-rc2 |
686 |
{ |
673fae90d firmware loader: ... |
687 |
return class_register(&firmware_class); |
1da177e4c Linux-2.6.12-rc2 |
688 |
} |
673fae90d firmware loader: ... |
689 690 |
static void __exit firmware_class_exit(void) |
1da177e4c Linux-2.6.12-rc2 |
691 692 693 |
{ class_unregister(&firmware_class); } |
a30a6a2cb [PATCH] x86 micro... |
694 |
fs_initcall(firmware_class_init); |
1da177e4c Linux-2.6.12-rc2 |
695 696 697 698 699 |
module_exit(firmware_class_exit); EXPORT_SYMBOL(release_firmware); EXPORT_SYMBOL(request_firmware); EXPORT_SYMBOL(request_firmware_nowait); |