c868edf42b
Now that the udev firmware loader is optional request_firmware() will not provide any information on the kernel ring buffer if direct firmware loading failed and udev firmware loading is disabled. If no information is needed request_firmware_direct() should be used for optional firmware, at which point drivers can take on the onus over informing of any failures, if udev firmware loading is disabled though we should at the very least provide some sort of information as when the udev loader was enabled by default back in the days. With this change with a simple firmware load test module [0]: Example output without FW_LOADER_USER_HELPER_FALLBACK platform fake-dev.0: Direct firmware load for fake.bin failed with error -2 Example with FW_LOADER_USER_HELPER_FALLBACK platform fake-dev.0: Direct firmware load for fake.bin failed with error -2 platform fake-dev.0: Falling back to user helper Without this change without FW_LOADER_USER_HELPER_FALLBACK we get no output logged upon failure. Cc: Tom Gundersen <teg@jklm.no> Cc: Ming Lei <ming.lei@canonical.com> Cc: Abhay Salunke <Abhay_Salunke@dell.com> Cc: Stefan Roese <sr@denx.de> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Kay Sievers <kay@vrfy.org> Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com> Reviewed-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
80 lines
2 KiB
C
80 lines
2 KiB
C
#ifndef _LINUX_FIRMWARE_H
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#define _LINUX_FIRMWARE_H
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#include <linux/types.h>
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#include <linux/compiler.h>
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#include <linux/gfp.h>
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#define FW_ACTION_NOHOTPLUG 0
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#define FW_ACTION_HOTPLUG 1
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struct firmware {
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size_t size;
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const u8 *data;
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struct page **pages;
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/* firmware loader private fields */
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void *priv;
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};
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struct module;
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struct device;
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struct builtin_fw {
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char *name;
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void *data;
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unsigned long size;
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};
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/* We have to play tricks here much like stringify() to get the
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__COUNTER__ macro to be expanded as we want it */
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#define __fw_concat1(x, y) x##y
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#define __fw_concat(x, y) __fw_concat1(x, y)
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#define DECLARE_BUILTIN_FIRMWARE(name, blob) \
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DECLARE_BUILTIN_FIRMWARE_SIZE(name, &(blob), sizeof(blob))
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#define DECLARE_BUILTIN_FIRMWARE_SIZE(name, blob, size) \
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static const struct builtin_fw __fw_concat(__builtin_fw,__COUNTER__) \
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__used __section(.builtin_fw) = { name, blob, size }
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#if defined(CONFIG_FW_LOADER) || (defined(CONFIG_FW_LOADER_MODULE) && defined(MODULE))
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int request_firmware(const struct firmware **fw, const char *name,
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struct device *device);
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int request_firmware_nowait(
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struct module *module, bool uevent,
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const char *name, struct device *device, gfp_t gfp, void *context,
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void (*cont)(const struct firmware *fw, void *context));
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int request_firmware_direct(const struct firmware **fw, const char *name,
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struct device *device);
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void release_firmware(const struct firmware *fw);
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#else
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static inline int request_firmware(const struct firmware **fw,
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const char *name,
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struct device *device)
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{
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return -EINVAL;
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}
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static inline int request_firmware_nowait(
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struct module *module, bool uevent,
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const char *name, struct device *device, gfp_t gfp, void *context,
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void (*cont)(const struct firmware *fw, void *context))
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{
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return -EINVAL;
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}
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static inline void release_firmware(const struct firmware *fw)
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{
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}
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static inline int request_firmware_direct(const struct firmware **fw,
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const char *name,
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struct device *device)
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{
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return -EINVAL;
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}
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#endif
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#endif
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