#include <linux/string.h>
#include <linux/errno.h>
#include <linux/blkdev.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/moduleparam.h>
#include <linux/firmware.h>
MODULE_AUTHOR("Abhay Salunke <abhay_salunke@dell.com>");
MODULE_DESCRIPTION("Driver for updating BIOS image on DELL systems");
MODULE_LICENSE("GPL");
-MODULE_VERSION("2.0");
+MODULE_VERSION("3.1");
#define BIOS_SCAN_LIMIT 0xffffffff
#define MAX_IMAGE_LENGTH 16
int dma_alloc;
spinlock_t lock;
unsigned long packet_read_count;
- unsigned long packet_write_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");
+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;
static void init_packet_head(void)
{
INIT_LIST_HEAD(&packet_data_head.list);
- rbu_data.packet_write_count = 0;
rbu_data.packet_read_count = 0;
rbu_data.num_packets = 0;
rbu_data.packetsize = 0;
+ rbu_data.imagesize = 0;
}
-static int fill_last_packet(void *data, size_t length)
-{
- struct list_head *ptemp_list;
- struct packet_data *packet = NULL;
- int packet_count = 0;
-
- pr_debug("fill_last_packet: entry \n");
-
- if (!rbu_data.num_packets) {
- pr_debug("fill_last_packet: num_packets=0\n");
- return -ENOMEM;
- }
-
- packet_count = rbu_data.num_packets;
-
- ptemp_list = (&packet_data_head.list)->prev;
-
- packet = list_entry(ptemp_list, struct packet_data, list);
-
- if ((rbu_data.packet_write_count + length) > rbu_data.packetsize) {
- pr_debug("dell_rbu:%s: packet size data "
- "overrun\n", __FUNCTION__);
- return -EINVAL;
- }
-
- pr_debug("fill_last_packet : buffer = %p\n", packet->data);
-
- memcpy((packet->data + rbu_data.packet_write_count), data, length);
-
- if ((rbu_data.packet_write_count + length) == rbu_data.packetsize) {
- /*
- * this was the last data chunk in the packet
- * so reinitialize the packet data counter to zero
- */
- rbu_data.packet_write_count = 0;
- } else
- rbu_data.packet_write_count += length;
-
- pr_debug("fill_last_packet: exit \n");
- return 0;
-}
-
-static int create_packet(size_t length)
+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");
- return -EINVAL;
+ retval = -EINVAL;
+ goto out_noalloc;
}
+
spin_unlock(&rbu_data.lock);
- newpacket = kmalloc(sizeof (struct packet_data), GFP_KERNEL);
- spin_lock(&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__);
- return -ENOMEM;
+ retval = -ENOMEM;
+ spin_lock(&rbu_data.lock);
+ goto out_noalloc;
}
ordernum = get_order(length);
+
/*
- * there is no upper limit on memory
- * address for packetized mechanism
+ * 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.
*/
- spin_unlock(&rbu_data.lock);
- newpacket->data = (unsigned char *) __get_free_pages(GFP_KERNEL,
- ordernum);
- spin_lock(&rbu_data.lock);
+ 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);
- pr_debug("create_packet: newpacket %p\n", newpacket->data);
-
- if (!newpacket->data) {
+ if (!invalid_addr_packet_array) {
printk(KERN_WARNING
- "dell_rbu:%s: failed to allocate new "
- "packet\n", __FUNCTION__);
- kfree(newpacket);
- return -ENOMEM;
+ "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
- */
+
+ /* initialize the newly created packet headers */
INIT_LIST_HEAD(&newpacket->list);
list_add_tail(&newpacket->list, &packet_data_head.list);
- /*
- * packets have fixed size
- */
- newpacket->length = rbu_data.packetsize;
+
+ memcpy(newpacket->data, data, length);
pr_debug("create_packet: exit \n");
- return 0;
+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;
- if (!rbu_data.packet_write_count) {
- if ((rc = create_packet(length)))
+ /* 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;
}
- if ((rc = fill_last_packet(data, length)))
- return rc;
+
+ rbu_data.imagesize = length;
return rc;
}
return bytes_copied;
}
-static int packet_read_list(char *data, size_t *pread_length)
+static int packet_read_list(char *data, size_t * pread_length)
{
struct list_head *ptemp_list;
int temp_count = 0;
newpacket->ordernum);
kfree(newpacket);
}
- rbu_data.packet_write_count = 0;
rbu_data.packet_read_count = 0;
rbu_data.num_packets = 0;
- rbu_data.packetsize = 0;
+ rbu_data.imagesize = 0;
}
/*
size_t bytes_left;
size_t data_length;
char *ptempBuf = buffer;
- unsigned long imagesize;
/* check to see if we have something to return */
if (rbu_data.num_packets == 0) {
goto read_rbu_data_exit;
}
- imagesize = rbu_data.num_packets * rbu_data.packetsize;
-
- if (pos > imagesize) {
+ 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 = imagesize - pos;
+ 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) > imagesize) {
+ if ((pos + count) > rbu_data.imagesize) {
rbu_data.packet_read_count = 0;
/* this was the last copy */
retval = bytes_left;
}
static ssize_t read_rbu_data(struct kobject *kobj, char *buffer,
- loff_t pos, size_t count)
+ loff_t pos, size_t count)
{
ssize_t ret_count = 0;
memcpy(rbu_data.image_update_buffer,
fw->data, fw->size);
} else if (!strcmp(image_type, "packet")) {
- if (!rbu_data.packetsize)
- rbu_data.packetsize = fw->size;
- else if (rbu_data.packetsize != fw->size) {
+ /*
+ * 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();
- rbu_data.packetsize = fw->size;
- }
- packetize_data(fw->data, fw->size);
} else
pr_debug("invalid image type specified.\n");
spin_unlock(&rbu_data.lock);
}
static ssize_t read_rbu_image_type(struct kobject *kobj, char *buffer,
- loff_t pos, size_t count)
+ loff_t pos, size_t count)
{
int size = 0;
if (!pos)
}
static ssize_t write_rbu_image_type(struct kobject *kobj, char *buffer,
- loff_t pos, size_t count)
+ loff_t pos, size_t count)
{
int rc = count;
int req_firm_rc = 0;
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,
- },
+ .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,
- },
+ .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;
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);
module_exit(dcdrbu_exit);
module_init(dcdrbu_init);
+
+/* vim:noet:ts=8:sw=8
+*/
projects / linux-2.6-omap-h63xx.git / blobdiff