#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("3.0");
+MODULE_VERSION("3.1");
#define BIOS_SCAN_LIMIT 0xffffffff
#define MAX_IMAGE_LENGTH 16
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;
{
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 may not have fixed size
- */
- newpacket->length = length;
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)
module_exit(dcdrbu_exit);
module_init(dcdrbu_init);
+
+/* vim:noet:ts=8:sw=8
+*/
projects / linux-2.6-omap-h63xx.git / blobdiff