mirror of https://gitee.com/openkylin/linux.git
764 lines
19 KiB
C
764 lines
19 KiB
C
/*
|
|
* 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/config.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.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>
|
|
|
|
MODULE_AUTHOR("Abhay Salunke <abhay_salunke@dell.com>");
|
|
MODULE_DESCRIPTION("Driver for updating BIOS image on DELL systems");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION("3.1");
|
|
|
|
#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 = 0;
|
|
void *packet_data_temp_buf = 0;
|
|
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", __FUNCTION__);
|
|
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 = kzalloc(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",
|
|
__FUNCTION__);
|
|
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", __FUNCTION__);
|
|
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 = 0;
|
|
}
|
|
}
|
|
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(void *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 %d\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("%lu:%lu\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);
|
|
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", __FUNCTION__);
|
|
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)
|
|
{
|
|
unsigned char *ptemp = NULL;
|
|
size_t bytes_left = 0;
|
|
size_t data_length = 0;
|
|
ssize_t ret_count = 0;
|
|
|
|
/* 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);
|
|
ret_count = -ENOMEM;
|
|
goto read_rbu_data_exit;
|
|
}
|
|
|
|
if (pos > rbu_data.bios_image_size) {
|
|
ret_count = 0;
|
|
goto read_rbu_data_exit;
|
|
}
|
|
|
|
bytes_left = rbu_data.bios_image_size - pos;
|
|
data_length = min(bytes_left, count);
|
|
|
|
ptemp = rbu_data.image_update_buffer;
|
|
memcpy(buffer, (ptemp + pos), data_length);
|
|
|
|
if ((pos + count) > rbu_data.bios_image_size)
|
|
/* this was the last copy */
|
|
ret_count = bytes_left;
|
|
else
|
|
ret_count = count;
|
|
read_rbu_data_exit:
|
|
return ret_count;
|
|
}
|
|
|
|
static ssize_t read_rbu_data(struct kobject *kobj, 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)
|
|
{
|
|
int rc = 0;
|
|
|
|
if (!fw || !fw->size) {
|
|
rbu_data.entry_created = 0;
|
|
return;
|
|
}
|
|
|
|
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);
|
|
|
|
rc = request_firmware_nowait(THIS_MODULE, FW_ACTION_NOHOTPLUG,
|
|
"dell_rbu", &rbu_device->dev, &context, callbackfn_rbu);
|
|
if (rc)
|
|
printk(KERN_ERR
|
|
"dell_rbu:%s request_firmware_nowait failed"
|
|
" %d\n", __FUNCTION__, rc);
|
|
else
|
|
rbu_data.entry_created = 1;
|
|
}
|
|
|
|
static ssize_t read_rbu_image_type(struct kobject *kobj, char *buffer,
|
|
loff_t pos, size_t count)
|
|
{
|
|
int size = 0;
|
|
if (!pos)
|
|
size = sprintf(buffer, "%s\n", image_type);
|
|
return size;
|
|
}
|
|
|
|
static ssize_t write_rbu_image_type(struct kobject *kobj, 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, &context,
|
|
callbackfn_rbu);
|
|
if (req_firm_rc) {
|
|
printk(KERN_ERR
|
|
"dell_rbu:%s request_firmware_nowait"
|
|
" failed %d\n", __FUNCTION__, 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 kobject *kobj, char *buffer,
|
|
loff_t pos, size_t count)
|
|
{
|
|
int size = 0;
|
|
if (!pos) {
|
|
spin_lock(&rbu_data.lock);
|
|
size = sprintf(buffer, "%lu\n", rbu_data.packetsize);
|
|
spin_unlock(&rbu_data.lock);
|
|
}
|
|
return size;
|
|
}
|
|
|
|
static ssize_t write_rbu_packet_size(struct kobject *kobj, 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",.owner = THIS_MODULE,.mode = 0444},
|
|
.read = read_rbu_data,
|
|
};
|
|
|
|
static struct bin_attribute rbu_image_type_attr = {
|
|
.attr = {.name = "image_type",.owner = THIS_MODULE,.mode = 0644},
|
|
.read = read_rbu_image_type,
|
|
.write = write_rbu_image_type,
|
|
};
|
|
|
|
static struct bin_attribute rbu_packet_size_attr = {
|
|
.attr = {.name = "packet_size",.owner = THIS_MODULE,.mode = 0644},
|
|
.read = read_rbu_packet_size,
|
|
.write = write_rbu_packet_size,
|
|
};
|
|
|
|
static int __init dcdrbu_init(void)
|
|
{
|
|
int rc = 0;
|
|
spin_lock_init(&rbu_data.lock);
|
|
|
|
init_packet_head();
|
|
rbu_device =
|
|
platform_device_register_simple("dell_rbu", -1, NULL, 0);
|
|
if (!rbu_device) {
|
|
printk(KERN_ERR
|
|
"dell_rbu:%s:platform_device_register_simple "
|
|
"failed\n", __FUNCTION__);
|
|
return -EIO;
|
|
}
|
|
|
|
sysfs_create_bin_file(&rbu_device->dev.kobj, &rbu_data_attr);
|
|
sysfs_create_bin_file(&rbu_device->dev.kobj, &rbu_image_type_attr);
|
|
sysfs_create_bin_file(&rbu_device->dev.kobj,
|
|
&rbu_packet_size_attr);
|
|
|
|
rc = request_firmware_nowait(THIS_MODULE, FW_ACTION_NOHOTPLUG,
|
|
"dell_rbu", &rbu_device->dev, &context, callbackfn_rbu);
|
|
if (rc)
|
|
printk(KERN_ERR "dell_rbu:%s:request_firmware_nowait"
|
|
" failed %d\n", __FUNCTION__, rc);
|
|
else
|
|
rbu_data.entry_created = 1;
|
|
|
|
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
|
|
*/
|