From c48e2ffd717ca4a67b4938bb60d110b7eeed39c4 Mon Sep 17 00:00:00 2001 From: Stuart Hayes Date: Wed, 26 Sep 2018 16:50:19 -0500 Subject: firmware: dell_rbu: Move dell_rbu to drivers/platform/x86 Move dell_rbu to the more appropriate directory drivers/platform/x86. Signed-off-by: Stuart Hayes Signed-off-by: Andy Shevchenko --- drivers/firmware/Kconfig | 12 - drivers/firmware/Makefile | 1 - drivers/firmware/dell_rbu.c | 753 -------------------------------------------- 3 files changed, 766 deletions(-) delete mode 100644 drivers/firmware/dell_rbu.c (limited to 'drivers/firmware') diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig index 6e83880046d7..02f39d20efce 100644 --- a/drivers/firmware/Kconfig +++ b/drivers/firmware/Kconfig @@ -145,18 +145,6 @@ config EFI_PCDP See DIG64_HCDPv20_042804.pdf available from -config DELL_RBU - tristate "BIOS update support for DELL systems via sysfs" - depends on X86 - select FW_LOADER - select FW_LOADER_USER_HELPER - help - Say m if you want to have the option of updating the BIOS for your - DELL system. Note you need a Dell OpenManage or Dell Update package (DUP) - supporting application to communicate with the BIOS regarding the new - image for the image update to take effect. - See for more details on the driver. - config DCDBAS tristate "Dell Systems Management Base Driver" depends on X86 diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile index e18a041cfc53..61887ba9df1d 100644 --- a/drivers/firmware/Makefile +++ b/drivers/firmware/Makefile @@ -11,7 +11,6 @@ obj-$(CONFIG_DMI) += dmi_scan.o obj-$(CONFIG_DMI_SYSFS) += dmi-sysfs.o obj-$(CONFIG_EDD) += edd.o obj-$(CONFIG_EFI_PCDP) += pcdp.o -obj-$(CONFIG_DELL_RBU) += dell_rbu.o obj-$(CONFIG_DCDBAS) += dcdbas.o obj-$(CONFIG_DMIID) += dmi-id.o obj-$(CONFIG_ISCSI_IBFT_FIND) += iscsi_ibft_find.o diff --git a/drivers/firmware/dell_rbu.c b/drivers/firmware/dell_rbu.c deleted file mode 100644 index ccefa84f7305..000000000000 --- a/drivers/firmware/dell_rbu.c +++ /dev/null @@ -1,753 +0,0 @@ -/* - * dell_rbu.c - * Bios Update driver for Dell systems - * Author: Dell Inc - * Abhay Salunke - * - * Copyright (C) 2005 Dell Inc. - * - * Remote BIOS Update (rbu) driver is used for updating DELL BIOS by - * creating entries in the /sys file systems on Linux 2.6 and higher - * kernels. The driver supports two mechanism to update the BIOS namely - * contiguous and packetized. Both these methods still require having some - * application to set the CMOS bit indicating the BIOS to update itself - * after a reboot. - * - * Contiguous method: - * This driver writes the incoming data in a monolithic image by allocating - * contiguous physical pages large enough to accommodate the incoming BIOS - * image size. - * - * Packetized method: - * The driver writes the incoming packet image by allocating a new packet - * on every time the packet data is written. This driver requires an - * application to break the BIOS image in to fixed sized packet chunks. - * - * See Documentation/dell_rbu.txt for more info. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License v2.0 as published by - * the Free Software Foundation - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -MODULE_AUTHOR("Abhay Salunke "); -MODULE_DESCRIPTION("Driver for updating BIOS image on DELL systems"); -MODULE_LICENSE("GPL"); -MODULE_VERSION("3.2"); - -#define BIOS_SCAN_LIMIT 0xffffffff -#define MAX_IMAGE_LENGTH 16 -static struct _rbu_data { - void *image_update_buffer; - unsigned long image_update_buffer_size; - unsigned long bios_image_size; - int image_update_ordernum; - int dma_alloc; - spinlock_t lock; - unsigned long packet_read_count; - unsigned long num_packets; - unsigned long packetsize; - unsigned long imagesize; - int entry_created; -} rbu_data; - -static char image_type[MAX_IMAGE_LENGTH + 1] = "mono"; -module_param_string(image_type, image_type, sizeof (image_type), 0); -MODULE_PARM_DESC(image_type, - "BIOS image type. choose- mono or packet or init"); - -static unsigned long allocation_floor = 0x100000; -module_param(allocation_floor, ulong, 0644); -MODULE_PARM_DESC(allocation_floor, - "Minimum address for allocations when using Packet mode"); - -struct packet_data { - struct list_head list; - size_t length; - void *data; - int ordernum; -}; - -static struct packet_data packet_data_head; - -static struct platform_device *rbu_device; -static int context; -static dma_addr_t dell_rbu_dmaaddr; - -static void init_packet_head(void) -{ - INIT_LIST_HEAD(&packet_data_head.list); - rbu_data.packet_read_count = 0; - rbu_data.num_packets = 0; - rbu_data.packetsize = 0; - rbu_data.imagesize = 0; -} - -static int create_packet(void *data, size_t length) -{ - struct packet_data *newpacket; - int ordernum = 0; - int retval = 0; - unsigned int packet_array_size = 0; - void **invalid_addr_packet_array = NULL; - void *packet_data_temp_buf = NULL; - unsigned int idx = 0; - - pr_debug("create_packet: entry \n"); - - if (!rbu_data.packetsize) { - pr_debug("create_packet: packetsize not specified\n"); - retval = -EINVAL; - goto out_noalloc; - } - - spin_unlock(&rbu_data.lock); - - newpacket = kzalloc(sizeof (struct packet_data), GFP_KERNEL); - - if (!newpacket) { - printk(KERN_WARNING - "dell_rbu:%s: failed to allocate new " - "packet\n", __func__); - retval = -ENOMEM; - spin_lock(&rbu_data.lock); - goto out_noalloc; - } - - ordernum = get_order(length); - - /* - * BIOS errata mean we cannot allocate packets below 1MB or they will - * be overwritten by BIOS. - * - * array to temporarily hold packets - * that are below the allocation floor - * - * NOTE: very simplistic because we only need the floor to be at 1MB - * due to BIOS errata. This shouldn't be used for higher floors - * or you will run out of mem trying to allocate the array. - */ - packet_array_size = max( - (unsigned int)(allocation_floor / rbu_data.packetsize), - (unsigned int)1); - invalid_addr_packet_array = kcalloc(packet_array_size, sizeof(void *), - GFP_KERNEL); - - if (!invalid_addr_packet_array) { - printk(KERN_WARNING - "dell_rbu:%s: failed to allocate " - "invalid_addr_packet_array \n", - __func__); - retval = -ENOMEM; - spin_lock(&rbu_data.lock); - goto out_alloc_packet; - } - - while (!packet_data_temp_buf) { - packet_data_temp_buf = (unsigned char *) - __get_free_pages(GFP_KERNEL, ordernum); - if (!packet_data_temp_buf) { - printk(KERN_WARNING - "dell_rbu:%s: failed to allocate new " - "packet\n", __func__); - retval = -ENOMEM; - spin_lock(&rbu_data.lock); - goto out_alloc_packet_array; - } - - if ((unsigned long)virt_to_phys(packet_data_temp_buf) - < allocation_floor) { - pr_debug("packet 0x%lx below floor at 0x%lx.\n", - (unsigned long)virt_to_phys( - packet_data_temp_buf), - allocation_floor); - invalid_addr_packet_array[idx++] = packet_data_temp_buf; - packet_data_temp_buf = NULL; - } - } - /* - * set to uncachable or it may never get written back before reboot - */ - set_memory_uc((unsigned long)packet_data_temp_buf, 1 << ordernum); - - spin_lock(&rbu_data.lock); - - newpacket->data = packet_data_temp_buf; - - pr_debug("create_packet: newpacket at physical addr %lx\n", - (unsigned long)virt_to_phys(newpacket->data)); - - /* packets may not have fixed size */ - newpacket->length = length; - newpacket->ordernum = ordernum; - ++rbu_data.num_packets; - - /* initialize the newly created packet headers */ - INIT_LIST_HEAD(&newpacket->list); - list_add_tail(&newpacket->list, &packet_data_head.list); - - memcpy(newpacket->data, data, length); - - pr_debug("create_packet: exit \n"); - -out_alloc_packet_array: - /* always free packet array */ - for (;idx>0;idx--) { - pr_debug("freeing unused packet below floor 0x%lx.\n", - (unsigned long)virt_to_phys( - invalid_addr_packet_array[idx-1])); - free_pages((unsigned long)invalid_addr_packet_array[idx-1], - ordernum); - } - kfree(invalid_addr_packet_array); - -out_alloc_packet: - /* if error, free data */ - if (retval) - kfree(newpacket); - -out_noalloc: - return retval; -} - -static int packetize_data(const u8 *data, size_t length) -{ - int rc = 0; - int done = 0; - int packet_length; - u8 *temp; - u8 *end = (u8 *) data + length; - pr_debug("packetize_data: data length %zd\n", length); - if (!rbu_data.packetsize) { - printk(KERN_WARNING - "dell_rbu: packetsize not specified\n"); - return -EIO; - } - - temp = (u8 *) data; - - /* packetize the hunk */ - while (!done) { - if ((temp + rbu_data.packetsize) < end) - packet_length = rbu_data.packetsize; - else { - /* this is the last packet */ - packet_length = end - temp; - done = 1; - } - - if ((rc = create_packet(temp, packet_length))) - return rc; - - pr_debug("%p:%td\n", temp, (end - temp)); - temp += packet_length; - } - - rbu_data.imagesize = length; - - return rc; -} - -static int do_packet_read(char *data, struct list_head *ptemp_list, - int length, int bytes_read, int *list_read_count) -{ - void *ptemp_buf; - struct packet_data *newpacket = NULL; - int bytes_copied = 0; - int j = 0; - - newpacket = list_entry(ptemp_list, struct packet_data, list); - *list_read_count += newpacket->length; - - if (*list_read_count > bytes_read) { - /* point to the start of unread data */ - j = newpacket->length - (*list_read_count - bytes_read); - /* point to the offset in the packet buffer */ - ptemp_buf = (u8 *) newpacket->data + j; - /* - * check if there is enough room in - * * the incoming buffer - */ - if (length > (*list_read_count - bytes_read)) - /* - * copy what ever is there in this - * packet and move on - */ - bytes_copied = (*list_read_count - bytes_read); - else - /* copy the remaining */ - bytes_copied = length; - memcpy(data, ptemp_buf, bytes_copied); - } - return bytes_copied; -} - -static int packet_read_list(char *data, size_t * pread_length) -{ - struct list_head *ptemp_list; - int temp_count = 0; - int bytes_copied = 0; - int bytes_read = 0; - int remaining_bytes = 0; - char *pdest = data; - - /* check if we have any packets */ - if (0 == rbu_data.num_packets) - return -ENOMEM; - - remaining_bytes = *pread_length; - bytes_read = rbu_data.packet_read_count; - - ptemp_list = (&packet_data_head.list)->next; - while (!list_empty(ptemp_list)) { - bytes_copied = do_packet_read(pdest, ptemp_list, - remaining_bytes, bytes_read, &temp_count); - remaining_bytes -= bytes_copied; - bytes_read += bytes_copied; - pdest += bytes_copied; - /* - * check if we reached end of buffer before reaching the - * last packet - */ - if (remaining_bytes == 0) - break; - - ptemp_list = ptemp_list->next; - } - /*finally set the bytes read */ - *pread_length = bytes_read - rbu_data.packet_read_count; - rbu_data.packet_read_count = bytes_read; - return 0; -} - -static void packet_empty_list(void) -{ - struct list_head *ptemp_list; - struct list_head *pnext_list; - struct packet_data *newpacket; - - ptemp_list = (&packet_data_head.list)->next; - while (!list_empty(ptemp_list)) { - newpacket = - list_entry(ptemp_list, struct packet_data, list); - pnext_list = ptemp_list->next; - list_del(ptemp_list); - ptemp_list = pnext_list; - /* - * zero out the RBU packet memory before freeing - * to make sure there are no stale RBU packets left in memory - */ - memset(newpacket->data, 0, rbu_data.packetsize); - set_memory_wb((unsigned long)newpacket->data, - 1 << newpacket->ordernum); - free_pages((unsigned long) newpacket->data, - newpacket->ordernum); - kfree(newpacket); - } - rbu_data.packet_read_count = 0; - rbu_data.num_packets = 0; - rbu_data.imagesize = 0; -} - -/* - * img_update_free: Frees the buffer allocated for storing BIOS image - * Always called with lock held and returned with lock held - */ -static void img_update_free(void) -{ - if (!rbu_data.image_update_buffer) - return; - /* - * zero out this buffer before freeing it to get rid of any stale - * BIOS image copied in memory. - */ - memset(rbu_data.image_update_buffer, 0, - rbu_data.image_update_buffer_size); - if (rbu_data.dma_alloc == 1) - dma_free_coherent(NULL, rbu_data.bios_image_size, - rbu_data.image_update_buffer, dell_rbu_dmaaddr); - else - free_pages((unsigned long) rbu_data.image_update_buffer, - rbu_data.image_update_ordernum); - - /* - * Re-initialize the rbu_data variables after a free - */ - rbu_data.image_update_ordernum = -1; - rbu_data.image_update_buffer = NULL; - rbu_data.image_update_buffer_size = 0; - rbu_data.bios_image_size = 0; - rbu_data.dma_alloc = 0; -} - -/* - * img_update_realloc: This function allocates the contiguous pages to - * accommodate the requested size of data. The memory address and size - * values are stored globally and on every call to this function the new - * size is checked to see if more data is required than the existing size. - * If true the previous memory is freed and new allocation is done to - * accommodate the new size. If the incoming size is less then than the - * already allocated size, then that memory is reused. This function is - * called with lock held and returns with lock held. - */ -static int img_update_realloc(unsigned long size) -{ - unsigned char *image_update_buffer = NULL; - unsigned long rc; - unsigned long img_buf_phys_addr; - int ordernum; - int dma_alloc = 0; - - /* - * check if the buffer of sufficient size has been - * already allocated - */ - if (rbu_data.image_update_buffer_size >= size) { - /* - * check for corruption - */ - if ((size != 0) && (rbu_data.image_update_buffer == NULL)) { - printk(KERN_ERR "dell_rbu:%s: corruption " - "check failed\n", __func__); - return -EINVAL; - } - /* - * we have a valid pre-allocated buffer with - * sufficient size - */ - return 0; - } - - /* - * free any previously allocated buffer - */ - img_update_free(); - - spin_unlock(&rbu_data.lock); - - ordernum = get_order(size); - image_update_buffer = - (unsigned char *) __get_free_pages(GFP_KERNEL, ordernum); - - img_buf_phys_addr = - (unsigned long) virt_to_phys(image_update_buffer); - - if (img_buf_phys_addr > BIOS_SCAN_LIMIT) { - free_pages((unsigned long) image_update_buffer, ordernum); - ordernum = -1; - image_update_buffer = dma_alloc_coherent(NULL, size, - &dell_rbu_dmaaddr, GFP_KERNEL); - dma_alloc = 1; - } - - spin_lock(&rbu_data.lock); - - if (image_update_buffer != NULL) { - rbu_data.image_update_buffer = image_update_buffer; - rbu_data.image_update_buffer_size = size; - rbu_data.bios_image_size = - rbu_data.image_update_buffer_size; - rbu_data.image_update_ordernum = ordernum; - rbu_data.dma_alloc = dma_alloc; - rc = 0; - } else { - pr_debug("Not enough memory for image update:" - "size = %ld\n", size); - rc = -ENOMEM; - } - - return rc; -} - -static ssize_t read_packet_data(char *buffer, loff_t pos, size_t count) -{ - int retval; - size_t bytes_left; - size_t data_length; - char *ptempBuf = buffer; - - /* check to see if we have something to return */ - if (rbu_data.num_packets == 0) { - pr_debug("read_packet_data: no packets written\n"); - retval = -ENOMEM; - goto read_rbu_data_exit; - } - - if (pos > rbu_data.imagesize) { - retval = 0; - printk(KERN_WARNING "dell_rbu:read_packet_data: " - "data underrun\n"); - goto read_rbu_data_exit; - } - - bytes_left = rbu_data.imagesize - pos; - data_length = min(bytes_left, count); - - if ((retval = packet_read_list(ptempBuf, &data_length)) < 0) - goto read_rbu_data_exit; - - if ((pos + count) > rbu_data.imagesize) { - rbu_data.packet_read_count = 0; - /* this was the last copy */ - retval = bytes_left; - } else - retval = count; - - read_rbu_data_exit: - return retval; -} - -static ssize_t read_rbu_mono_data(char *buffer, loff_t pos, size_t count) -{ - /* check to see if we have something to return */ - if ((rbu_data.image_update_buffer == NULL) || - (rbu_data.bios_image_size == 0)) { - pr_debug("read_rbu_data_mono: image_update_buffer %p ," - "bios_image_size %lu\n", - rbu_data.image_update_buffer, - rbu_data.bios_image_size); - return -ENOMEM; - } - - return memory_read_from_buffer(buffer, count, &pos, - rbu_data.image_update_buffer, rbu_data.bios_image_size); -} - -static ssize_t read_rbu_data(struct file *filp, struct kobject *kobj, - struct bin_attribute *bin_attr, - char *buffer, loff_t pos, size_t count) -{ - ssize_t ret_count = 0; - - spin_lock(&rbu_data.lock); - - if (!strcmp(image_type, "mono")) - ret_count = read_rbu_mono_data(buffer, pos, count); - else if (!strcmp(image_type, "packet")) - ret_count = read_packet_data(buffer, pos, count); - else - pr_debug("read_rbu_data: invalid image type specified\n"); - - spin_unlock(&rbu_data.lock); - return ret_count; -} - -static void callbackfn_rbu(const struct firmware *fw, void *context) -{ - rbu_data.entry_created = 0; - - if (!fw) - return; - - if (!fw->size) - goto out; - - spin_lock(&rbu_data.lock); - if (!strcmp(image_type, "mono")) { - if (!img_update_realloc(fw->size)) - memcpy(rbu_data.image_update_buffer, - fw->data, fw->size); - } else if (!strcmp(image_type, "packet")) { - /* - * we need to free previous packets if a - * new hunk of packets needs to be downloaded - */ - packet_empty_list(); - if (packetize_data(fw->data, fw->size)) - /* Incase something goes wrong when we are - * in middle of packetizing the data, we - * need to free up whatever packets might - * have been created before we quit. - */ - packet_empty_list(); - } else - pr_debug("invalid image type specified.\n"); - spin_unlock(&rbu_data.lock); - out: - release_firmware(fw); -} - -static ssize_t read_rbu_image_type(struct file *filp, struct kobject *kobj, - struct bin_attribute *bin_attr, - char *buffer, loff_t pos, size_t count) -{ - int size = 0; - if (!pos) - size = scnprintf(buffer, count, "%s\n", image_type); - return size; -} - -static ssize_t write_rbu_image_type(struct file *filp, struct kobject *kobj, - struct bin_attribute *bin_attr, - char *buffer, loff_t pos, size_t count) -{ - int rc = count; - int req_firm_rc = 0; - int i; - spin_lock(&rbu_data.lock); - /* - * Find the first newline or space - */ - for (i = 0; i < count; ++i) - if (buffer[i] == '\n' || buffer[i] == ' ') { - buffer[i] = '\0'; - break; - } - if (i == count) - buffer[count] = '\0'; - - if (strstr(buffer, "mono")) - strcpy(image_type, "mono"); - else if (strstr(buffer, "packet")) - strcpy(image_type, "packet"); - else if (strstr(buffer, "init")) { - /* - * If due to the user error the driver gets in a bad - * state where even though it is loaded , the - * /sys/class/firmware/dell_rbu entries are missing. - * to cover this situation the user can recreate entries - * by writing init to image_type. - */ - if (!rbu_data.entry_created) { - spin_unlock(&rbu_data.lock); - req_firm_rc = request_firmware_nowait(THIS_MODULE, - FW_ACTION_NOHOTPLUG, "dell_rbu", - &rbu_device->dev, GFP_KERNEL, &context, - callbackfn_rbu); - if (req_firm_rc) { - printk(KERN_ERR - "dell_rbu:%s request_firmware_nowait" - " failed %d\n", __func__, rc); - rc = -EIO; - } else - rbu_data.entry_created = 1; - - spin_lock(&rbu_data.lock); - } - } else { - printk(KERN_WARNING "dell_rbu: image_type is invalid\n"); - spin_unlock(&rbu_data.lock); - return -EINVAL; - } - - /* we must free all previous allocations */ - packet_empty_list(); - img_update_free(); - spin_unlock(&rbu_data.lock); - - return rc; -} - -static ssize_t read_rbu_packet_size(struct file *filp, struct kobject *kobj, - struct bin_attribute *bin_attr, - char *buffer, loff_t pos, size_t count) -{ - int size = 0; - if (!pos) { - spin_lock(&rbu_data.lock); - size = scnprintf(buffer, count, "%lu\n", rbu_data.packetsize); - spin_unlock(&rbu_data.lock); - } - return size; -} - -static ssize_t write_rbu_packet_size(struct file *filp, struct kobject *kobj, - struct bin_attribute *bin_attr, - char *buffer, loff_t pos, size_t count) -{ - unsigned long temp; - spin_lock(&rbu_data.lock); - packet_empty_list(); - sscanf(buffer, "%lu", &temp); - if (temp < 0xffffffff) - rbu_data.packetsize = temp; - - spin_unlock(&rbu_data.lock); - return count; -} - -static struct bin_attribute rbu_data_attr = { - .attr = {.name = "data", .mode = 0444}, - .read = read_rbu_data, -}; - -static struct bin_attribute rbu_image_type_attr = { - .attr = {.name = "image_type", .mode = 0644}, - .read = read_rbu_image_type, - .write = write_rbu_image_type, -}; - -static struct bin_attribute rbu_packet_size_attr = { - .attr = {.name = "packet_size", .mode = 0644}, - .read = read_rbu_packet_size, - .write = write_rbu_packet_size, -}; - -static int __init dcdrbu_init(void) -{ - int rc; - spin_lock_init(&rbu_data.lock); - - init_packet_head(); - rbu_device = platform_device_register_simple("dell_rbu", -1, NULL, 0); - if (IS_ERR(rbu_device)) { - printk(KERN_ERR - "dell_rbu:%s:platform_device_register_simple " - "failed\n", __func__); - return PTR_ERR(rbu_device); - } - - rc = sysfs_create_bin_file(&rbu_device->dev.kobj, &rbu_data_attr); - if (rc) - goto out_devreg; - rc = sysfs_create_bin_file(&rbu_device->dev.kobj, &rbu_image_type_attr); - if (rc) - goto out_data; - rc = sysfs_create_bin_file(&rbu_device->dev.kobj, - &rbu_packet_size_attr); - if (rc) - goto out_imtype; - - rbu_data.entry_created = 0; - return 0; - -out_imtype: - sysfs_remove_bin_file(&rbu_device->dev.kobj, &rbu_image_type_attr); -out_data: - sysfs_remove_bin_file(&rbu_device->dev.kobj, &rbu_data_attr); -out_devreg: - platform_device_unregister(rbu_device); - return rc; -} - -static __exit void dcdrbu_exit(void) -{ - spin_lock(&rbu_data.lock); - packet_empty_list(); - img_update_free(); - spin_unlock(&rbu_data.lock); - platform_device_unregister(rbu_device); -} - -module_exit(dcdrbu_exit); -module_init(dcdrbu_init); - -/* vim:noet:ts=8:sw=8 -*/ -- cgit v1.2.3-59-g8ed1b