diff options
| -rw-r--r-- | sys/compat/linuxkpi/common/include/linux/firmware.h | 13 | ||||
| -rw-r--r-- | sys/compat/linuxkpi/common/src/linux_firmware.c | 24 |
2 files changed, 37 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/firmware.h b/sys/compat/linuxkpi/common/include/linux/firmware.h index ada7d0d73edf..ed84d6fbf58f 100644 --- a/sys/compat/linuxkpi/common/include/linux/firmware.h +++ b/sys/compat/linuxkpi/common/include/linux/firmware.h @@ -2,6 +2,7 @@ * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2020-2021 The FreeBSD Foundation + * Copyright (c) 2022 Bjoern A. Zeeb * * This software was developed by Björn Zeeb under sponsorship from * the FreeBSD Foundation. @@ -56,6 +57,8 @@ int linuxkpi_request_firmware(const struct linuxkpi_firmware **, int linuxkpi_firmware_request_nowarn(const struct linuxkpi_firmware **, const char *, struct device *); void linuxkpi_release_firmware(const struct linuxkpi_firmware *); +int linuxkpi_request_partial_firmware_into_buf(const struct linuxkpi_firmware **, + const char *, struct device *, uint8_t *, size_t, size_t); static __inline int @@ -100,6 +103,16 @@ release_firmware(const struct linuxkpi_firmware *fw) linuxkpi_release_firmware(fw); } +static inline int +request_partial_firmware_into_buf(const struct linuxkpi_firmware **fw, + const char *fw_name, struct device *dev, void *buf, size_t buflen, + size_t offset) +{ + + return (linuxkpi_request_partial_firmware_into_buf(fw, fw_name, + dev, buf, buflen, offset)); +} + #define firmware linuxkpi_firmware #endif /* _LINUXKPI_LINUX_FIRMWARE_H */ diff --git a/sys/compat/linuxkpi/common/src/linux_firmware.c b/sys/compat/linuxkpi/common/src/linux_firmware.c index 47cccd42da20..7e8418151c64 100644 --- a/sys/compat/linuxkpi/common/src/linux_firmware.c +++ b/sys/compat/linuxkpi/common/src/linux_firmware.c @@ -2,6 +2,7 @@ * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2020-2021 The FreeBSD Foundation + * Copyright (c) 2022 Bjoern A. Zeeb * * This software was developed by Björn Zeeb under sponsorship from * the FreeBSD Foundation. @@ -223,3 +224,26 @@ linuxkpi_release_firmware(const struct linuxkpi_firmware *fw) firmware_put(fw->fbdfw, FIRMWARE_UNLOAD); free(__DECONST(void *, fw), M_LKPI_FW); } + +int +linuxkpi_request_partial_firmware_into_buf(const struct linuxkpi_firmware **fw, + const char *fw_name, struct device *dev, uint8_t *buf, size_t buflen, + size_t offset) +{ + const struct linuxkpi_firmware *lfw; + int error; + + error = linuxkpi_request_firmware(fw, fw_name, dev); + if (error != 0) + return (error); + + lfw = *fw; + if ((offset + buflen) >= lfw->size) { + linuxkpi_release_firmware(lfw); + return (-ERANGE); + } + + memcpy(buf, lfw->data + offset, buflen); + + return (0); +} |