[PATCH 2.4] BIOS Enhanced Disk Drive Services 3.0 support
From: Matt Domsch
Date: Sat Sep 13 2003 - 16:12:49 EST
Dave and hpa, this adds BIOS Enhanced Disk Drive Services 3.0 support
(makes int13 calls in setup.S to detect BIOS support, exports data via
/proc with the edd.o module).
This patch has been in 2.4.x-ac since January, and I've
heard no ill reports. Equivalent support was included in 2.5.44.
Two in-production BIOSes actually support EDD3.0 today properly, LSI RAID
controllers and Adaptec 39160 add-in cards. Several others are working
toward compliance.
Also posted at:
http://domsch.com/linux/edd30/linux/linux-2.4.23-pre4-edd-20030913.patch.gz
http://domsch.com/linux/edd30/linux/linux-2.4.23-pre4-edd-20030913.patch.gz.asc
Please ack and forward to Marcelo.
Thanks,
Matt
--
Matt Domsch
Sr. Software Engineer
Dell Linux Solutions www.dell.com/linux
Linux on Dell mailing lists @ http://lists.us.dell.com
diff -Nur --exclude=RCS --exclude=CVS --exclude=SCCS --exclude=BitKeeper --exclude=ChangeSet ../linux-2.4/Documentation/Configure.help linux-2.4-edd-work/Documentation/Configure.help
--- ../linux-2.4/Documentation/Configure.help Sat Sep 13 13:42:37 2003
+++ linux-2.4-edd-work/Documentation/Configure.help Sat Sep 13 14:13:03 2003
@@ -20170,6 +20170,15 @@
<file:Documentation/modules.txt>. The module will be called
cpuid.o
+x86 BIOS Enhanced Disk Drive support
+CONFIG_EDD
+ Say Y or M here if you want to enable BIOS Enhanced Disk Drive
+ Services real mode BIOS calls to determine which disk
+ BIOS tries boot from. This information is then exported via /proc.
+
+ This option is experimental, but believed to be safe,
+ and most disk controller BIOS vendors do not yet implement this feature.
+
SBC-60XX Watchdog Timer
CONFIG_60XX_WDT
This driver can be used with the watchdog timer found on some
diff -Nur --exclude=RCS --exclude=CVS --exclude=SCCS --exclude=BitKeeper --exclude=ChangeSet ../linux-2.4/Documentation/i386/zero-page.txt linux-2.4-edd-work/Documentation/i386/zero-page.txt
--- ../linux-2.4/Documentation/i386/zero-page.txt Thu Jan 30 17:07:28 2003
+++ linux-2.4-edd-work/Documentation/i386/zero-page.txt Tue Jan 21 23:28:14 2003
@@ -31,6 +31,7 @@
0x1e0 unsigned long ALT_MEM_K, alternative mem check, in Kb
0x1e8 char number of entries in E820MAP (below)
+0x1e9 unsigned char number of entries in EDDBUF (below)
0x1f1 char size of setup.S, number of sectors
0x1f2 unsigned short MOUNT_ROOT_RDONLY (if !=0)
0x1f4 unsigned short size of compressed kernel-part in the
@@ -66,6 +67,7 @@
0x220 4 bytes (setup.S)
0x224 unsigned short setup.S heap end pointer
0x2d0 - 0x600 E820MAP
+0x600 - 0x7D4 EDDBUF (setup.S)
0x800 string, 2K max COMMAND_LINE, the kernel commandline as
copied using CL_OFFSET.
diff -Nur --exclude=RCS --exclude=CVS --exclude=SCCS --exclude=BitKeeper --exclude=ChangeSet ../linux-2.4/arch/i386/boot/setup.S linux-2.4-edd-work/arch/i386/boot/setup.S
--- ../linux-2.4/arch/i386/boot/setup.S Mon Nov 4 16:23:31 2002
+++ linux-2.4-edd-work/arch/i386/boot/setup.S Tue Jan 21 23:28:15 2003
@@ -45,6 +45,10 @@
* New A20 code ported from SYSLINUX by H. Peter Anvin. AMD Elan bugfixes
* by Robert Schwebel, December 2001 <robert@xxxxxxxxxxx>
*
+ * BIOS Enhanced Disk Drive support
+ * by Matt Domsch <Matt_Domsch@xxxxxxxx> October 2002
+ * conformant to T13 Committee www.t13.org
+ * projects 1572D, 1484D, 1386D, 1226DT
*/
#include <linux/config.h>
@@ -53,6 +57,7 @@
#include <linux/compile.h>
#include <asm/boot.h>
#include <asm/e820.h>
+#include <asm/edd.h>
#include <asm/page.h>
/* Signature words to ensure LILO loaded us right */
@@ -541,6 +546,70 @@
no_32_apm_bios:
andw $0xfffd, (76) # remove 32 bit support bit
done_apm_bios:
+#endif
+
+#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
+# Do the BIOS Enhanced Disk Drive calls
+# This consists of two calls:
+# int 13h ah=41h "Check Extensions Present"
+# int 13h ah=48h "Get Device Parameters"
+#
+# A buffer of size EDDMAXNR*(EDDEXTSIZE+EDDPARMSIZE) is reserved for our use
+# in the empty_zero_page at EDDBUF. The first four bytes of which are
+# used to store the device number, interface support map and version
+# results from fn41. The following 74 bytes are used to store
+# the results from fn48. Starting from device 80h, fn41, then fn48
+# are called and their results stored in EDDBUF+n*(EDDEXTSIZE+EDDPARMIZE).
+# Then the pointer is incremented to store the data for the next call.
+# This repeats until either a device doesn't exist, or until EDDMAXNR
+# devices have been stored.
+# The one tricky part is that ds:si always points four bytes into
+# the structure, and the fn41 results are stored at offsets
+# from there. This removes the need to increment the pointer for
+# every store, and leaves it ready for the fn48 call.
+# A second one-byte buffer, EDDNR, in the empty_zero_page stores
+# the number of BIOS devices which exist, up to EDDMAXNR.
+# In setup.c, copy_edd() stores both empty_zero_page buffers away
+# for later use, as they would get overwritten otherwise.
+# This code is sensitive to the size of the structs in edd.h
+edd_start:
+ # %ds points to the bootsector
+ # result buffer for fn48
+ movw $EDDBUF+EDDEXTSIZE, %si # in ds:si, fn41 results
+ # kept just before that
+ movb $0, (EDDNR) # zero value at EDDNR
+ movb $0x80, %dl # BIOS device 0x80
+
+edd_check_ext:
+ movb $CHECKEXTENSIONSPRESENT, %ah # Function 41
+ movw $EDDMAGIC1, %bx # magic
+ int $0x13 # make the call
+ jc edd_done # no more BIOS devices
+
+ cmpw $EDDMAGIC2, %bx # is magic right?
+ jne edd_next # nope, next...
+
+ movb %dl, %ds:-4(%si) # store device number
+ movb %ah, %ds:-3(%si) # store version
+ movw %cx, %ds:-2(%si) # store extensions
+ incb (EDDNR) # note that we stored something
+
+edd_get_device_params:
+ movw $EDDPARMSIZE, %ds:(%si) # put size
+ movb $GETDEVICEPARAMETERS, %ah # Function 48
+ int $0x13 # make the call
+ # Don't check for fail return
+ # it doesn't matter.
+ movw %si, %ax # increment si
+ addw $EDDPARMSIZE+EDDEXTSIZE, %ax
+ movw %ax, %si
+
+edd_next:
+ incb %dl # increment to next device
+ cmpb $EDDMAXNR, (EDDNR) # Out of space?
+ jb edd_check_ext # keep looping
+
+edd_done:
#endif
# Now we want to move to protected mode ...
diff -Nur --exclude=RCS --exclude=CVS --exclude=SCCS --exclude=BitKeeper --exclude=ChangeSet ../linux-2.4/arch/i386/config.in linux-2.4-edd-work/arch/i386/config.in
--- ../linux-2.4/arch/i386/config.in Sat Sep 6 20:36:44 2003
+++ linux-2.4-edd-work/arch/i386/config.in Sat Sep 13 14:13:04 2003
@@ -201,6 +201,10 @@
tristate '/dev/cpu/*/msr - Model-specific register support' CONFIG_X86_MSR
tristate '/dev/cpu/*/cpuid - CPU information support' CONFIG_X86_CPUID
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ tristate 'BIOS Enhanced Disk Drive calls determine boot disk (EXPERIMENTAL)' CONFIG_EDD
+fi
+
choice 'High Memory Support' \
"off CONFIG_NOHIGHMEM \
4GB CONFIG_HIGHMEM4G \
diff -Nur --exclude=RCS --exclude=CVS --exclude=SCCS --exclude=BitKeeper --exclude=ChangeSet ../linux-2.4/arch/i386/defconfig linux-2.4-edd-work/arch/i386/defconfig
--- ../linux-2.4/arch/i386/defconfig Sat Sep 6 20:36:44 2003
+++ linux-2.4-edd-work/arch/i386/defconfig Sat Sep 13 14:13:04 2003
@@ -56,6 +56,7 @@
# CONFIG_MICROCODE is not set
# CONFIG_X86_MSR is not set
# CONFIG_X86_CPUID is not set
+# CONFIG_EDD is not set
CONFIG_NOHIGHMEM=y
# CONFIG_HIGHMEM4G is not set
# CONFIG_HIGHMEM64G is not set
diff -Nur --exclude=RCS --exclude=CVS --exclude=SCCS --exclude=BitKeeper --exclude=ChangeSet ../linux-2.4/arch/i386/kernel/Makefile linux-2.4-edd-work/arch/i386/kernel/Makefile
--- ../linux-2.4/arch/i386/kernel/Makefile Sat Sep 13 13:52:24 2003
+++ linux-2.4-edd-work/arch/i386/kernel/Makefile Sat Sep 13 14:13:04 2003
@@ -43,5 +43,6 @@
obj-$(CONFIG_X86_LOCAL_APIC) += mpparse.o apic.o nmi.o
obj-$(CONFIG_X86_IO_APIC) += io_apic.o
obj-$(CONFIG_X86_VISWS_APIC) += visws_apic.o
+obj-$(CONFIG_EDD) += edd.o
include $(TOPDIR)/Rules.make
diff -Nur --exclude=RCS --exclude=CVS --exclude=SCCS --exclude=BitKeeper --exclude=ChangeSet ../linux-2.4/arch/i386/kernel/edd.c linux-2.4-edd-work/arch/i386/kernel/edd.c
--- ../linux-2.4/arch/i386/kernel/edd.c Wed Dec 31 18:00:00 1969
+++ linux-2.4-edd-work/arch/i386/kernel/edd.c Tue Jan 21 23:26:08 2003
@@ -0,0 +1,672 @@
+/*
+ * linux/arch/i386/kernel/edd.c
+ * Copyright (C) 2002 Dell Computer Corporation
+ * by Matt Domsch <Matt_Domsch@xxxxxxxx>
+ *
+ * BIOS Enhanced Disk Drive Services (EDD)
+ * conformant to T13 Committee www.t13.org
+ * projects 1572D, 1484D, 1386D, 1226DT
+ *
+ * This code takes information provided by BIOS EDD calls
+ * fn41 - Check Extensions Present and
+ * fn48 - Get Device Parametes with EDD extensions
+ * made in setup.S, copied to safe structures in setup.c,
+ * and presents it in /proc.
+ *
+ * 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.
+ *
+ */
+
+/*
+ * TODO:
+ * - move edd.[ch] to better locations if/when one is decided
+ * - keep current with 2.5 EDD code changes
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/stat.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
+#include <linux/limits.h>
+#include <linux/pci.h>
+#include <linux/proc_fs.h>
+#include <asm/edd.h>
+
+MODULE_AUTHOR("Matt Domsch <Matt_Domsch@xxxxxxxx>");
+MODULE_DESCRIPTION("proc interface to BIOS EDD information");
+MODULE_LICENSE("GPL");
+
+#define EDD_VERSION "0.09 2003-Jan-21"
+#define EDD_DEVICE_NAME_SIZE 16
+#define REPORT_URL "http://domsch.com/linux/edd30/results.html";
+
+#define left (count - (p - page) - 1)
+
+static struct proc_dir_entry *bios_dir;
+
+struct attr_entry {
+ struct proc_dir_entry *entry;
+ struct list_head node;
+};
+
+struct edd_device {
+ char name[EDD_DEVICE_NAME_SIZE];
+ struct edd_info *info;
+ struct proc_dir_entry *dir;
+ struct list_head attr_list;
+};
+
+static struct edd_device *edd_devices[EDDMAXNR];
+
+struct edd_attribute {
+ char *name;
+ int (*show)(char *page, char **start, off_t off,
+ int count, int *eof, void *data);
+ int (*test) (struct edd_device * edev);
+};
+
+#define EDD_DEVICE_ATTR(_name,_show,_test) \
+struct edd_attribute edd_attr_##_name = { \
+ .name = __stringify(_name), \
+ .show = _show, \
+ .test = _test, \
+};
+
+static inline struct edd_info *
+edd_dev_get_info(struct edd_device *edev)
+{
+ return edev->info;
+}
+
+static inline void
+edd_dev_set_info(struct edd_device *edev, struct edd_info *info)
+{
+ edev->info = info;
+}
+
+static int
+proc_calc_metrics(char *page, char **start, off_t off,
+ int count, int *eof, int len)
+{
+ if (len <= off+count) *eof = 1;
+ *start = page + off;
+ len -= off;
+ if (len>count) len = count;
+ if (len<0) len = 0;
+ return len;
+}
+
+static int
+edd_dump_raw_data(char *b, int count, void *data, int length)
+{
+ char *orig_b = b;
+ char hexbuf[80], ascbuf[20], *h, *a, c;
+ unsigned char *p = data;
+ unsigned long column = 0;
+ int length_printed = 0, d;
+ const char maxcolumn = 16;
+ while (length_printed < length && count > 0) {
+ h = hexbuf;
+ a = ascbuf;
+ for (column = 0;
+ column < maxcolumn && length_printed < length; column++) {
+ h += sprintf(h, "%02x ", (unsigned char) *p);
+ if (!isprint(*p))
+ c = '.';
+ else
+ c = *p;
+ a += sprintf(a, "%c", c);
+ p++;
+ length_printed++;
+ }
+ /* pad out the line */
+ for (; column < maxcolumn; column++) {
+ h += sprintf(h, " ");
+ a += sprintf(a, " ");
+ }
+ d = snprintf(b, count, "%s\t%s\n", hexbuf, ascbuf);
+ b += d;
+ count -= d;
+ }
+ return (b - orig_b);
+}
+
+static int
+edd_show_host_bus(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+ struct edd_info *info = data;
+ char *p = page;
+ int i;
+
+ if (!info || !page || off) {
+ return proc_calc_metrics(page, start, off, count, eof, 0);
+ }
+
+ for (i = 0; i < 4; i++) {
+ if (isprint(info->params.host_bus_type[i])) {
+ p += snprintf(p, left, "%c", info->params.host_bus_type[i]);
+ } else {
+ p += snprintf(p, left, " ");
+ }
+ }
+
+ if (!strncmp(info->params.host_bus_type, "ISA", 3)) {
+ p += snprintf(p, left, "\tbase_address: %x\n",
+ info->params.interface_path.isa.base_address);
+ } else if (!strncmp(info->params.host_bus_type, "PCIX", 4) ||
+ !strncmp(info->params.host_bus_type, "PCI", 3)) {
+ p += snprintf(p, left,
+ "\t%02x:%02x.%d channel: %u\n",
+ info->params.interface_path.pci.bus,
+ info->params.interface_path.pci.slot,
+ info->params.interface_path.pci.function,
+ info->params.interface_path.pci.channel);
+ } else if (!strncmp(info->params.host_bus_type, "IBND", 4) ||
+ !strncmp(info->params.host_bus_type, "XPRS", 4) ||
+ !strncmp(info->params.host_bus_type, "HTPT", 4)) {
+ p += snprintf(p, left,
+ "\tTBD: %llx\n",
+ info->params.interface_path.ibnd.reserved);
+
+ } else {
+ p += snprintf(p, left, "\tunknown: %llx\n",
+ info->params.interface_path.unknown.reserved);
+ }
+ return proc_calc_metrics(page, start, off, count, eof, (p - page));
+}
+
+static int
+edd_show_interface(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+ struct edd_info *info = data;
+ char *p = page;
+ int i;
+
+ if (!info || !page || off) {
+ return proc_calc_metrics(page, start, off, count, eof, 0);
+ }
+
+ for (i = 0; i < 8; i++) {
+ if (isprint(info->params.interface_type[i])) {
+ p += snprintf(p, left, "%c", info->params.interface_type[i]);
+ } else {
+ p += snprintf(p, left, " ");
+ }
+ }
+ if (!strncmp(info->params.interface_type, "ATAPI", 5)) {
+ p += snprintf(p, left, "\tdevice: %u lun: %u\n",
+ info->params.device_path.atapi.device,
+ info->params.device_path.atapi.lun);
+ } else if (!strncmp(info->params.interface_type, "ATA", 3)) {
+ p += snprintf(p, left, "\tdevice: %u\n",
+ info->params.device_path.ata.device);
+ } else if (!strncmp(info->params.interface_type, "SCSI", 4)) {
+ p += snprintf(p, left, "\tid: %u lun: %llu\n",
+ info->params.device_path.scsi.id,
+ info->params.device_path.scsi.lun);
+ } else if (!strncmp(info->params.interface_type, "USB", 3)) {
+ p += snprintf(p, left, "\tserial_number: %llx\n",
+ info->params.device_path.usb.serial_number);
+ } else if (!strncmp(info->params.interface_type, "1394", 4)) {
+ p += snprintf(p, left, "\teui: %llx\n",
+ info->params.device_path.i1394.eui);
+ } else if (!strncmp(info->params.interface_type, "FIBRE", 5)) {
+ p += snprintf(p, left, "\twwid: %llx lun: %llx\n",
+ info->params.device_path.fibre.wwid,
+ info->params.device_path.fibre.lun);
+ } else if (!strncmp(info->params.interface_type, "I2O", 3)) {
+ p += snprintf(p, left, "\tidentity_tag: %llx\n",
+ info->params.device_path.i2o.identity_tag);
+ } else if (!strncmp(info->params.interface_type, "RAID", 4)) {
+ p += snprintf(p, left, "\tidentity_tag: %x\n",
+ info->params.device_path.raid.array_number);
+ } else if (!strncmp(info->params.interface_type, "SATA", 4)) {
+ p += snprintf(p, left, "\tdevice: %u\n",
+ info->params.device_path.sata.device);
+ } else {
+ p += snprintf(p, left, "\tunknown: %llx %llx\n",
+ info->params.device_path.unknown.reserved1,
+ info->params.device_path.unknown.reserved2);
+ }
+
+ return proc_calc_metrics(page, start, off, count, eof, (p - page));
+}
+
+/**
+ * edd_show_raw_data() - unparses EDD information, returned to user-space
+ *
+ * Returns: number of bytes written, or 0 on failure
+ */
+static int
+edd_show_raw_data(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+ struct edd_info *info = data;
+ char *p = page;
+ int i, warn_padding = 0, nonzero_path = 0,
+ len = sizeof (*info) - 4;
+ uint8_t checksum = 0, c = 0;
+ if (!info || !page || off) {
+ return proc_calc_metrics(page, start, off, count, eof, 0);
+ }
+
+ if (!(info->params.key == 0xBEDD || info->params.key == 0xDDBE))
+ len = info->params.length;
+
+ p += snprintf(p, left, "int13 fn48 returned data:\n\n");
+ p += edd_dump_raw_data(p, left, ((char *) info) + 4, len);
+
+ /* Spec violation. Adaptec AIC7899 returns 0xDDBE
+ here, when it should be 0xBEDD.
+ */
+ p += snprintf(p, left, "\n");
+ if (info->params.key == 0xDDBE) {
+ p += snprintf(p, left,
+ "Warning: Spec violation. Key should be 0xBEDD, is 0xDDBE\n");
+ }
+
+ if (!(info->params.key == 0xBEDD || info->params.key == 0xDDBE)) {
+ goto out;
+ }
+
+ for (i = 30; i <= 73; i++) {
+ c = *(((uint8_t *) info) + i + 4);
+ if (c)
+ nonzero_path++;
+ checksum += c;
+ }
+
+ if (checksum) {
+ p += snprintf(p, left,
+ "Warning: Spec violation. Device Path checksum invalid.\n");
+ }
+
+ if (!nonzero_path) {
+ p += snprintf(p, left, "Error: Spec violation. Empty device path.\n");
+ goto out;
+ }
+
+ for (i = 0; i < 4; i++) {
+ if (!isprint(info->params.host_bus_type[i])) {
+ warn_padding++;
+ }
+ }
+ for (i = 0; i < 8; i++) {
+ if (!isprint(info->params.interface_type[i])) {
+ warn_padding++;
+ }
+ }
+
+ if (warn_padding) {
+ p += snprintf(p, left,
+ "Warning: Spec violation. Padding should be 0x20.\n");
+ }
+
+out:
+ p += snprintf(p, left, "\nPlease check %s\n", REPORT_URL);
+ p += snprintf(p, left, "to see if this device has been reported. If not,\n");
+ p += snprintf(p, left, "please send the information requested there.\n");
+
+ return proc_calc_metrics(page, start, off, count, eof, (p - page));
+}
+
+static int
+edd_show_version(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+ struct edd_info *info = data;
+ char *p = page;
+ if (!info || !page || off) {
+ return proc_calc_metrics(page, start, off, count, eof, 0);
+ }
+
+ p += snprintf(p, left, "0x%02x\n", info->version);
+ return proc_calc_metrics(page, start, off, count, eof, (p - page));
+}
+
+static int
+edd_show_extensions(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+ struct edd_info *info = data;
+ char *p = page;
+ if (!info || !page || off) {
+ return proc_calc_metrics(page, start, off, count, eof, 0);
+ }
+
+ if (info->interface_support & EDD_EXT_FIXED_DISK_ACCESS) {
+ p += snprintf(p, left, "Fixed disk access\n");
+ }
+ if (info->interface_support & EDD_EXT_DEVICE_LOCKING_AND_EJECTING) {
+ p += snprintf(p, left, "Device locking and ejecting\n");
+ }
+ if (info->interface_support & EDD_EXT_ENHANCED_DISK_DRIVE_SUPPORT) {
+ p += snprintf(p, left, "Enhanced Disk Drive support\n");
+ }
+ if (info->interface_support & EDD_EXT_64BIT_EXTENSIONS) {
+ p += snprintf(p, left, "64-bit extensions\n");
+ }
+ return proc_calc_metrics(page, start, off, count, eof, (p - page));
+}
+
+static int
+edd_show_info_flags(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+ struct edd_info *info = data;
+ char *p = page;
+ if (!info || !page || off) {
+ return proc_calc_metrics(page, start, off, count, eof, 0);
+ }
+
+ if (info->params.info_flags & EDD_INFO_DMA_BOUNDRY_ERROR_TRANSPARENT)
+ p += snprintf(p, left, "DMA boundry error transparent\n");
+ if (info->params.info_flags & EDD_INFO_GEOMETRY_VALID)
+ p += snprintf(p, left, "geometry valid\n");
+ if (info->params.info_flags & EDD_INFO_REMOVABLE)
+ p += snprintf(p, left, "removable\n");
+ if (info->params.info_flags & EDD_INFO_WRITE_VERIFY)
+ p += snprintf(p, left, "write verify\n");
+ if (info->params.info_flags & EDD_INFO_MEDIA_CHANGE_NOTIFICATION)
+ p += snprintf(p, left, "media change notification\n");
+ if (info->params.info_flags & EDD_INFO_LOCKABLE)
+ p += snprintf(p, left, "lockable\n");
+ if (info->params.info_flags & EDD_INFO_NO_MEDIA_PRESENT)
+ p += snprintf(p, left, "no media present\n");
+ if (info->params.info_flags & EDD_INFO_USE_INT13_FN50)
+ p += snprintf(p, left, "use int13 fn50\n");
+ return proc_calc_metrics(page, start, off, count, eof, (p - page));
+}
+
+static int
+edd_show_default_cylinders(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+ struct edd_info *info = data;
+ char *p = page;
+ if (!info || !page || off) {
+ return proc_calc_metrics(page, start, off, count, eof, 0);
+ }
+
+ p += snprintf(p, left, "0x%x\n", info->params.num_default_cylinders);
+ return proc_calc_metrics(page, start, off, count, eof, (p - page));
+}
+
+static int
+edd_show_default_heads(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+ struct edd_info *info = data;
+ char *p = page;
+ if (!info || !page || off) {
+ return proc_calc_metrics(page, start, off, count, eof, 0);
+ }
+
+ p += snprintf(p, left, "0x%x\n", info->params.num_default_heads);
+ return proc_calc_metrics(page, start, off, count, eof, (p - page));
+}
+
+static int
+edd_show_default_sectors_per_track(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+ struct edd_info *info = data;
+ char *p = page;
+ if (!info || !page || off) {
+ return proc_calc_metrics(page, start, off, count, eof, 0);
+ }
+
+ p += snprintf(p, left, "0x%x\n", info->params.sectors_per_track);
+ return proc_calc_metrics(page, start, off, count, eof, (p - page));
+}
+
+static int
+edd_show_sectors(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+ struct edd_info *info = data;
+ char *p = page;
+ if (!info || !page || off) {
+ return proc_calc_metrics(page, start, off, count, eof, 0);
+ }
+
+ p += snprintf(p, left, "0x%llx\n", info->params.number_of_sectors);
+ return proc_calc_metrics(page, start, off, count, eof, (p - page));
+}
+
+static int
+edd_has_default_cylinders(struct edd_device *edev)
+{
+ struct edd_info *info = edd_dev_get_info(edev);
+ if (!edev || !info)
+ return 0;
+ return info->params.num_default_cylinders > 0;
+}
+
+static int
+edd_has_default_heads(struct edd_device *edev)
+{
+ struct edd_info *info = edd_dev_get_info(edev);
+ if (!edev || !info)
+ return 0;
+ return info->params.num_default_heads > 0;
+}
+
+static int
+edd_has_default_sectors_per_track(struct edd_device *edev)
+{
+ struct edd_info *info = edd_dev_get_info(edev);
+ if (!edev || !info)
+ return 0;
+ return info->params.sectors_per_track > 0;
+}
+
+static int
+edd_has_edd30(struct edd_device *edev)
+{
+ struct edd_info *info = edd_dev_get_info(edev);
+ int i, nonzero_path = 0;
+ char c;
+
+ if (!edev || !info)
+ return 0;
+
+ if (!(info->params.key == 0xBEDD || info->params.key == 0xDDBE)) {
+ return 0;
+ }
+
+ for (i = 30; i <= 73; i++) {
+ c = *(((uint8_t *) info) + i + 4);
+ if (c) {
+ nonzero_path++;
+ break;
+ }
+ }
+ if (!nonzero_path) {
+ return 0;
+ }
+
+ return 1;
+}
+
+static EDD_DEVICE_ATTR(raw_data, edd_show_raw_data, NULL);
+static EDD_DEVICE_ATTR(version, edd_show_version, NULL);
+static EDD_DEVICE_ATTR(extensions, edd_show_extensions, NULL);
+static EDD_DEVICE_ATTR(info_flags, edd_show_info_flags, NULL);
+static EDD_DEVICE_ATTR(sectors, edd_show_sectors, NULL);
+static EDD_DEVICE_ATTR(default_cylinders, edd_show_default_cylinders,
+ edd_has_default_cylinders);
+static EDD_DEVICE_ATTR(default_heads, edd_show_default_heads,
+ edd_has_default_heads);
+static EDD_DEVICE_ATTR(default_sectors_per_track,
+ edd_show_default_sectors_per_track,
+ edd_has_default_sectors_per_track);
+static EDD_DEVICE_ATTR(interface, edd_show_interface,edd_has_edd30);
+static EDD_DEVICE_ATTR(host_bus, edd_show_host_bus, edd_has_edd30);
+
+static struct edd_attribute *def_attrs[] = {
+ &edd_attr_raw_data,
+ &edd_attr_version,
+ &edd_attr_extensions,
+ &edd_attr_info_flags,
+ &edd_attr_sectors,
+ &edd_attr_default_cylinders,
+ &edd_attr_default_heads,
+ &edd_attr_default_sectors_per_track,
+ &edd_attr_interface,
+ &edd_attr_host_bus,
+ NULL,
+};
+
+static inline void
+edd_device_unregister(struct edd_device *edev)
+{
+ struct list_head *pos, *next;
+ struct attr_entry *ae;
+
+ list_for_each_safe(pos, next, &edev->attr_list) {
+ ae = list_entry(pos, struct attr_entry, node);
+ remove_proc_entry(ae->entry->name, edev->dir);
+ list_del(&ae->node);
+ kfree(ae);
+ }
+
+ remove_proc_entry(edev->dir->name, bios_dir);
+}
+
+static int
+edd_populate_dir(struct edd_device *edev)
+{
+ struct edd_attribute *attr;
+ struct attr_entry *ae;
+ int i;
+ int error = 0;
+
+ for (i = 0; (attr=def_attrs[i]); i++) {
+ if (!attr->test || (attr->test && attr->test(edev))) {
+ ae = kmalloc(sizeof (*ae), GFP_KERNEL);
+ if (ae == NULL) {
+ error = 1;
+ break;
+ }
+ INIT_LIST_HEAD(&ae->node);
+ ae->entry =
+ create_proc_read_entry(attr->name, 0444,
+ edev->dir, attr->show,
+ edd_dev_get_info(edev));
+ if (ae->entry == NULL) {
+ error = 1;
+ break;
+ }
+ list_add(&ae->node, &edev->attr_list);
+ }
+ }
+
+ if (error)
+ return error;
+
+ return 0;
+}
+
+static int
+edd_make_dir(struct edd_device *edev)
+{
+ int error=1;
+
+ edev->dir = proc_mkdir(edev->name, bios_dir);
+ if (edev->dir != NULL) {
+ edev->dir->mode = (S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO);
+ error = edd_populate_dir(edev);
+ }
+ return error;
+}
+
+static int
+edd_device_register(struct edd_device *edev, int i)
+{
+ int error;
+
+ if (!edev)
+ return 1;
+ memset(edev, 0, sizeof (*edev));
+ INIT_LIST_HEAD(&edev->attr_list);
+ edd_dev_set_info(edev, &edd[i]);
+ snprintf(edev->name, EDD_DEVICE_NAME_SIZE, "int13_dev%02x",
+ edd[i].device);
+ error = edd_make_dir(edev);
+ return error;
+}
+
+/**
+ * edd_init() - creates /proc/bios tree of EDD data
+ *
+ * This assumes that eddnr and edd were
+ * assigned in setup.c already.
+ */
+static int __init
+edd_init(void)
+{
+ unsigned int i;
+ int rc = 0;
+ struct edd_device *edev;
+
+ printk(KERN_INFO "BIOS EDD facility v%s, %d devices found\n",
+ EDD_VERSION, eddnr);
+
+ if (!eddnr) {
+ printk(KERN_INFO "EDD information not available.\n");
+ return 1;
+ }
+
+ bios_dir = proc_mkdir("bios", NULL);
+ if (bios_dir == NULL)
+ return 1;
+
+ for (i = 0; i < eddnr && i < EDDMAXNR && !rc; i++) {
+ edev = kmalloc(sizeof (*edev), GFP_KERNEL);
+ if (!edev) {
+ rc = 1;
+ break;
+ }
+
+ rc = edd_device_register(edev, i);
+ if (rc) {
+ break;
+ }
+ edd_devices[i] = edev;
+ }
+
+ if (rc) {
+ for (i = 0; i < eddnr && i < EDDMAXNR; i++) {
+ if ((edev = edd_devices[i])) {
+ edd_device_unregister(edev);
+ kfree(edev);
+ }
+ }
+
+ remove_proc_entry(bios_dir->name, NULL);
+ }
+
+ return rc;
+}
+
+static void __exit
+edd_exit(void)
+{
+ int i;
+ struct edd_device *edev;
+
+ for (i = 0; i < eddnr && i < EDDMAXNR; i++) {
+ if ((edev = edd_devices[i])) {
+ edd_device_unregister(edev);
+ kfree(edev);
+ }
+ }
+
+ remove_proc_entry(bios_dir->name, NULL);
+}
+
+module_init(edd_init);
+module_exit(edd_exit);
diff -Nur --exclude=RCS --exclude=CVS --exclude=SCCS --exclude=BitKeeper --exclude=ChangeSet ../linux-2.4/arch/i386/kernel/i386_ksyms.c linux-2.4-edd-work/arch/i386/kernel/i386_ksyms.c
--- ../linux-2.4/arch/i386/kernel/i386_ksyms.c Sat Sep 13 13:52:24 2003
+++ linux-2.4-edd-work/arch/i386/kernel/i386_ksyms.c Sat Sep 13 14:13:05 2003
@@ -28,6 +28,7 @@
#include <asm/desc.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
+#include <asm/edd.h>
extern void dump_thread(struct pt_regs *, struct user *);
extern spinlock_t rtc_lock;
@@ -179,4 +180,9 @@
#ifdef CONFIG_MULTIQUAD
EXPORT_SYMBOL(xquad_portio);
+#endif
+
+#ifdef CONFIG_EDD_MODULE
+EXPORT_SYMBOL(edd);
+EXPORT_SYMBOL(eddnr);
#endif
diff -Nur --exclude=RCS --exclude=CVS --exclude=SCCS --exclude=BitKeeper --exclude=ChangeSet ../linux-2.4/arch/i386/kernel/setup.c linux-2.4-edd-work/arch/i386/kernel/setup.c
--- ../linux-2.4/arch/i386/kernel/setup.c Sat Sep 13 13:52:25 2003
+++ linux-2.4-edd-work/arch/i386/kernel/setup.c Sat Sep 13 14:13:05 2003
@@ -120,6 +120,7 @@
#include <asm/dma.h>
#include <asm/mpspec.h>
#include <asm/mmu_context.h>
+#include <asm/edd.h>
/*
* Machine setup..
*/
@@ -211,6 +212,8 @@
#define KERNEL_START (*(unsigned long *) (PARAM+0x214))
#define INITRD_START (*(unsigned long *) (PARAM+0x218))
#define INITRD_SIZE (*(unsigned long *) (PARAM+0x21c))
+#define EDD_NR (*(unsigned char *) (PARAM+EDDNR))
+#define EDD_BUF ((struct edd_info *) (PARAM+EDDBUF))
#define COMMAND_LINE ((char *) (PARAM+2048))
#define COMMAND_LINE_SIZE 256
@@ -715,6 +718,23 @@
return 0;
}
+#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
+unsigned char eddnr;
+struct edd_info edd[EDDMAXNR];
+/**
+ * copy_edd() - Copy the BIOS EDD information
+ * from empty_zero_page into a safe place.
+ *
+ */
+static inline void copy_edd(void)
+{
+ eddnr = EDD_NR;
+ memcpy(edd, EDD_BUF, sizeof(edd));
+}
+#else
+#define copy_edd() do {} while (0)
+#endif
+
/*
* Do NOT EVER look at the BIOS memory size location.
* It does not work on many machines.
@@ -1151,6 +1171,7 @@
rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
#endif
setup_memory_region();
+ copy_edd();
if (!MOUNT_ROOT_RDONLY)
root_mountflags &= ~MS_RDONLY;
diff -Nur --exclude=RCS --exclude=CVS --exclude=SCCS --exclude=BitKeeper --exclude=ChangeSet ../linux-2.4/include/asm-i386/edd.h linux-2.4-edd-work/include/asm-i386/edd.h
--- ../linux-2.4/include/asm-i386/edd.h Wed Dec 31 18:00:00 1969
+++ linux-2.4-edd-work/include/asm-i386/edd.h Tue Jan 21 23:23:37 2003
@@ -0,0 +1,172 @@
+/*
+ * linux/include/asm-i386/edd.h
+ * Copyright (C) 2002 Dell Computer Corporation
+ * by Matt Domsch <Matt_Domsch@xxxxxxxx>
+ *
+ * structures and definitions for the int 13h, ax={41,48}h
+ * BIOS Enhanced Disk Drive Services
+ * This is based on the T13 group document D1572 Revision 0 (August 14 2002)
+ * available at http://www.t13.org/docs2002/d1572r0.pdf. It is
+ * very similar to D1484 Revision 3 http://www.t13.org/docs2002/d1484r3.pdf
+ *
+ * In a nutshell, arch/i386/boot/setup.S populates a scratch table
+ * in the empty_zero_block that contains a list of BIOS-enumerated
+ * boot devices.
+ * In arch/i386/kernel/setup.c, this information is
+ * transferred into the edd structure, and in arch/i386/kernel/edd.c, that
+ * information is used to identify BIOS boot disk. The code in setup.S
+ * is very sensitive to the size of these structures.
+ *
+ * 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.
+ *
+ */
+#ifndef _ASM_I386_EDD_H
+#define _ASM_I386_EDD_H
+
+#define EDDNR 0x1e9 /* addr of number of edd_info structs at EDDBUF
+ in empty_zero_block - treat this as 1 byte */
+#define EDDBUF 0x600 /* addr of edd_info structs in empty_zero_block */
+#define EDDMAXNR 6 /* number of edd_info structs starting at EDDBUF */
+#define EDDEXTSIZE 4 /* change these if you muck with the structures */
+#define EDDPARMSIZE 74
+#define CHECKEXTENSIONSPRESENT 0x41
+#define GETDEVICEPARAMETERS 0x48
+#define EDDMAGIC1 0x55AA
+#define EDDMAGIC2 0xAA55
+
+#ifndef __ASSEMBLY__
+
+#define EDD_EXT_FIXED_DISK_ACCESS (1 << 0)
+#define EDD_EXT_DEVICE_LOCKING_AND_EJECTING (1 << 1)
+#define EDD_EXT_ENHANCED_DISK_DRIVE_SUPPORT (1 << 2)
+#define EDD_EXT_64BIT_EXTENSIONS (1 << 3)
+
+#define EDD_INFO_DMA_BOUNDRY_ERROR_TRANSPARENT (1 << 0)
+#define EDD_INFO_GEOMETRY_VALID (1 << 1)
+#define EDD_INFO_REMOVABLE (1 << 2)
+#define EDD_INFO_WRITE_VERIFY (1 << 3)
+#define EDD_INFO_MEDIA_CHANGE_NOTIFICATION (1 << 4)
+#define EDD_INFO_LOCKABLE (1 << 5)
+#define EDD_INFO_NO_MEDIA_PRESENT (1 << 6)
+#define EDD_INFO_USE_INT13_FN50 (1 << 7)
+
+struct edd_device_params {
+ u16 length;
+ u16 info_flags;
+ u32 num_default_cylinders;
+ u32 num_default_heads;
+ u32 sectors_per_track;
+ u64 number_of_sectors;
+ u16 bytes_per_sector;
+ u32 dpte_ptr; /* 0xFFFFFFFF for our purposes */
+ u16 key; /* = 0xBEDD */
+ u8 device_path_info_length; /* = 44 */
+ u8 reserved2;
+ u16 reserved3;
+ u8 host_bus_type[4];
+ u8 interface_type[8];
+ union {
+ struct {
+ u16 base_address;
+ u16 reserved1;
+ u32 reserved2;
+ } __attribute__ ((packed)) isa;
+ struct {
+ u8 bus;
+ u8 slot;
+ u8 function;
+ u8 channel;
+ u32 reserved;
+ } __attribute__ ((packed)) pci;
+ /* pcix is same as pci */
+ struct {
+ u64 reserved;
+ } __attribute__ ((packed)) ibnd;
+ struct {
+ u64 reserved;
+ } __attribute__ ((packed)) xprs;
+ struct {
+ u64 reserved;
+ } __attribute__ ((packed)) htpt;
+ struct {
+ u64 reserved;
+ } __attribute__ ((packed)) unknown;
+ } interface_path;
+ union {
+ struct {
+ u8 device;
+ u8 reserved1;
+ u16 reserved2;
+ u32 reserved3;
+ u64 reserved4;
+ } __attribute__ ((packed)) ata;
+ struct {
+ u8 device;
+ u8 lun;
+ u8 reserved1;
+ u8 reserved2;
+ u32 reserved3;
+ u64 reserved4;
+ } __attribute__ ((packed)) atapi;
+ struct {
+ u16 id;
+ u64 lun;
+ u16 reserved1;
+ u32 reserved2;
+ } __attribute__ ((packed)) scsi;
+ struct {
+ u64 serial_number;
+ u64 reserved;
+ } __attribute__ ((packed)) usb;
+ struct {
+ u64 eui;
+ u64 reserved;
+ } __attribute__ ((packed)) i1394;
+ struct {
+ u64 wwid;
+ u64 lun;
+ } __attribute__ ((packed)) fibre;
+ struct {
+ u64 identity_tag;
+ u64 reserved;
+ } __attribute__ ((packed)) i2o;
+ struct {
+ u32 array_number;
+ u32 reserved1;
+ u64 reserved2;
+ } __attribute((packed)) raid;
+ struct {
+ u8 device;
+ u8 reserved1;
+ u16 reserved2;
+ u32 reserved3;
+ u64 reserved4;
+ } __attribute__ ((packed)) sata;
+ struct {
+ u64 reserved1;
+ u64 reserved2;
+ } __attribute__ ((packed)) unknown;
+ } device_path;
+ u8 reserved4;
+ u8 checksum;
+} __attribute__ ((packed));
+
+struct edd_info {
+ u8 device;
+ u8 version;
+ u16 interface_support;
+ struct edd_device_params params;
+} __attribute__ ((packed));
+
+extern struct edd_info edd[EDDMAXNR];
+extern unsigned char eddnr;
+#endif /*!__ASSEMBLY__ */
+
+#endif /* _ASM_I386_EDD_H */
-
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