Move dell_rbu to the more appropriate directory drivers/platform/x86.
Signed-off-by: Stuart Hayes <stuart.w.hayes@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
See DIG64_HCDPv20_042804.pdf available from
<http://www.dig64.org/specifications/>
-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 <file:Documentation/dell_rbu.txt> for more details on the driver.
-
config DCDBAS
tristate "Dell Systems Management Base Driver"
depends on X86
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
+++ /dev/null
-/*
- * dell_rbu.c
- * Bios Update driver for Dell systems
- * Author: Dell Inc
- * Abhay Salunke <abhay_salunke@dell.com>
- *
- * 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 <linux/init.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/errno.h>
-#include <linux/blkdev.h>
-#include <linux/platform_device.h>
-#include <linux/spinlock.h>
-#include <linux/moduleparam.h>
-#include <linux/firmware.h>
-#include <linux/dma-mapping.h>
-#include <asm/set_memory.h>
-
-MODULE_AUTHOR("Abhay Salunke <abhay_salunke@dell.com>");
-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
-*/
To compile this driver as a module, choose M here: the module will
be called dell-rbtn.
+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 <file:Documentation/dell_rbu.txt> for more details on the driver.
+
config FUJITSU_LAPTOP
tristate "Fujitsu Laptop Extras"
obj-$(CONFIG_DELL_WMI_LED) += dell-wmi-led.o
obj-$(CONFIG_DELL_SMO8800) += dell-smo8800.o
obj-$(CONFIG_DELL_RBTN) += dell-rbtn.o
+obj-$(CONFIG_DELL_RBU) += dell_rbu.o
obj-$(CONFIG_ACER_WMI) += acer-wmi.o
obj-$(CONFIG_ACER_WIRELESS) += acer-wireless.o
obj-$(CONFIG_ACERHDF) += acerhdf.o
--- /dev/null
+/*
+ * dell_rbu.c
+ * Bios Update driver for Dell systems
+ * Author: Dell Inc
+ * Abhay Salunke <abhay_salunke@dell.com>
+ *
+ * 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 <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/blkdev.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/moduleparam.h>
+#include <linux/firmware.h>
+#include <linux/dma-mapping.h>
+#include <asm/set_memory.h>
+
+MODULE_AUTHOR("Abhay Salunke <abhay_salunke@dell.com>");
+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
+*/
projects / openwrt / staging / blogic.git / commitdiff