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sys/compat/linuxkpi/common/src/linux_firmware.c
- This file was added.
| /*- | |||||
| * SPDX-License-Identifier: BSD-2-Clause | |||||
| * | |||||
| * Copyright (c) 2020 The FreeBSD Foundation | |||||
| * | |||||
| * This software was developed by Björn Zeeb under sponsorship from | |||||
| * the FreeBSD Foundation. | |||||
| * | |||||
| * Redistribution and use in source and binary forms, with or without | |||||
| * modification, are permitted provided that the following conditions | |||||
| * are met: | |||||
| * 1. Redistributions of source code must retain the above copyright | |||||
| * notice, this list of conditions and the following disclaimer. | |||||
| * 2. Redistributions in binary form must reproduce the above copyright | |||||
| * notice, this list of conditions and the following disclaimer in the | |||||
| * documentation and/or other materials provided with the distribution. | |||||
| * | |||||
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |||||
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |||||
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||||
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |||||
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |||||
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |||||
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |||||
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |||||
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |||||
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |||||
| * SUCH DAMAGE. | |||||
| * | |||||
| * $FreeBSD$ | |||||
| */ | |||||
| #include <sys/types.h> | |||||
| #include <sys/malloc.h> | |||||
| #include <sys/firmware.h> | |||||
| #include <linux/types.h> | |||||
| #include <linux/device.h> | |||||
| #include <linux/firmware.h> | |||||
| #undef firmware | |||||
| MALLOC_DEFINE(M_LKPI_FW, "lkpifw", "LinuxKPI Firmware"); | |||||
| static int | |||||
| _linuxkpi_request_firmware(const char *fw_name, const struct linuxkpi_firmware **fw, | |||||
| gfp_t gfp __unused, bool enoentok) | |||||
| { | |||||
| const struct firmware *fbdfw; | |||||
| struct linuxkpi_firmware *lfw; | |||||
| const char *fwimg; | |||||
| char *p; | |||||
| if (fw == NULL) | |||||
| return (-EINVAL); | |||||
| KASSERT(gfp == GFP_KERNEL, ("%s: gfp %#x", __func__, gfp)); | |||||
| lfw = malloc(sizeof(*lfw), M_LKPI_FW, M_WAITOK); | |||||
kib: Extra () around condition. | |||||
| /* | |||||
| * Linux can have a path in the firmware which is hard to replicate | |||||
| * for auto-firmware-module-loading. | |||||
| * On FreeBSD, depending on what people do, the firmware will either | |||||
| * be called "fw", or "dir_fw", or "modname_dir_fw". The later the | |||||
| * driver author has to deal with herself. | |||||
| * We also optionally flatten '.'s as some firmware modules do, | |||||
| * while others do not. | |||||
| */ | |||||
| /* (1) Try any name removed of path. */ | |||||
| fwimg = strrchr(fw_name, '/'); | |||||
| if (fwimg != NULL) | |||||
| fwimg++; | |||||
| if (fwimg == NULL || *fwimg == '\0') | |||||
| fwimg = fw_name; | |||||
| fbdfw = firmware_get(fwimg); | |||||
| /* (2) Try the original name if we have not yet. */ | |||||
| if (fbdfw == NULL && fwimg != fw_name) { | |||||
| fwimg = fw_name; | |||||
| fbdfw = firmware_get(fwimg); | |||||
| } | |||||
| /* (3) Flatten '/' and then '.' to '_' and try with adjusted name. */ | |||||
| if (fbdfw == NULL && | |||||
| (strchr(fw_name, '/') != NULL || strchr(fw_name, '.') != NULL)) { | |||||
| fwimg = strdup(fw_name, M_LKPI_FW); | |||||
| if (fwimg != NULL) { | |||||
| while ((p = strchr(fwimg, '/')) != NULL) | |||||
| *p = '_'; | |||||
| fbdfw = firmware_get(fwimg); | |||||
| if (fbdfw == NULL) { | |||||
| while ((p = strchr(fwimg, '.')) != NULL) | |||||
| *p = '_'; | |||||
| fbdfw = firmware_get(fwimg); | |||||
| } | |||||
| free(__DECONST(void *, fwimg), M_LKPI_FW); | |||||
| } | |||||
| } | |||||
| if (fbdfw == NULL) { | |||||
| if (enoentok) | |||||
| *fw = lfw; | |||||
| else | |||||
| free(lfw, M_LKPI_FW); | |||||
| return (-ENOENT); | |||||
| } | |||||
| lfw->fbdfw = fbdfw; | |||||
| lfw->data = (const uint8_t *)fbdfw->data; | |||||
| lfw->size = fbdfw->datasize; | |||||
| *fw = lfw; | |||||
| return (0); | |||||
| } | |||||
| int | |||||
| linuxkpi_request_firmware_nowait(struct module *mod __unused, bool _t __unused, | |||||
| const char *fw_name, struct device *dev __unused, gfp_t gfp, void *drv, | |||||
| void(*cont)(const struct linuxkpi_firmware *, void *)) | |||||
| { | |||||
| const struct linuxkpi_firmware *lfw; | |||||
| int error; | |||||
| /* Linux seems to run the callback if it cannot find the firmware. */ | |||||
| error = _linuxkpi_request_firmware(fw_name, &lfw, gfp, true); | |||||
| if (error == -ENOENT) | |||||
| error = 0; | |||||
| /* XXX-BZ we do not run this deferred. It's a compat layer. */ | |||||
| if (error == 0) | |||||
| cont(lfw, drv); | |||||
| return (error); | |||||
| } | |||||
| int | |||||
| linuxkpi_request_firmware(const struct linuxkpi_firmware **fw, | |||||
| const char *fw_name, struct device *dev __unused) | |||||
| { | |||||
| return (_linuxkpi_request_firmware(fw_name, fw, GFP_KERNEL, false)); | |||||
| } | |||||
| void | |||||
| linuxkpi_release_firmware(const struct linuxkpi_firmware *fw) | |||||
| { | |||||
| if (fw == NULL) | |||||
| return; | |||||
| if (fw->fbdfw) | |||||
| firmware_put(fw->fbdfw, FIRMWARE_UNLOAD); | |||||
| free(__DECONST(void *, fw), M_LKPI_FW); | |||||
| } | |||||
Done Inline Actions^^^ kib: ^^^ | |||||
Extra () around condition.