Documentation/Configure.help | 9
Documentation/i386/zero-page.txt | 2
arch/i386/boot/setup.S | 69 +++
arch/i386/config.in | 4
arch/i386/defconfig | 1
arch/i386/kernel/Makefile | 1
arch/i386/kernel/edd.c | 673 ++++++++++++++++++++++++++++++++++++
arch/i386/kernel/i386_ksyms.c | 6
arch/i386/kernel/setup.c | 21 +
include/asm-i386/edd.h | 172 +++++++++
10 files changed, 958 insertions
Patch below, and at:
http://domsch.com/linux/edd30/linux/linux-2.4.21-pre2-edd-20030106.patch.gz
http://domsch.com/linux/edd30/linux/linux-2.4.21-pre2-edd-20030106.patch.gz.asc
BK:
http://mdomsch.bkbits.net/linux-2.4-edd
Feedback welcome.
Thanks,
Matt
-- Matt Domsch Sr. Software Engineer, Lead Engineer, Architect Dell Linux Solutions www.dell.com/linux Linux on Dell mailing lists @ http://lists.us.dell.comdiff -urNp --exclude-from=/home/mdomsch/excludes --minimal ../linux-2.4/Documentation/Configure.help linux-2.4-edd-work/Documentation/Configure.help --- ../linux-2.4/Documentation/Configure.help Mon Jan 6 15:28:28 2003 +++ linux-2.4-edd-work/Documentation/Configure.help Sat Jan 4 14:32:36 2003 @@ -19010,6 +19010,15 @@ CONFIG_X86_CPUID <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 -urNp --exclude-from=/home/mdomsch/excludes --minimal ../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 Mon Jan 6 15:28:29 2003 +++ linux-2.4-edd-work/Documentation/i386/zero-page.txt Sat Jan 4 14:32:37 2003 @@ -31,6 +31,7 @@ Offset Type Description 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 @@ Offset Type Description 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 -urNp --exclude-from=/home/mdomsch/excludes --minimal ../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 Sat Jan 4 14:32:40 2003 @@ -45,6 +45,10 @@ * New A20 code ported from SYSLINUX by H. Peter Anvin. AMD Elan bugfixes * by Robert Schwebel, December 2001 <robert@schwebel.de> * + * BIOS Enhanced Disk Drive support + * by Matt Domsch <Matt_Domsch@dell.com> 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 @@ apm_disconnect: # Tidy up 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 $EDDMAXNR, (EDDNR) # Out of space? + jb edd_check_ext # keep looping + +edd_done: #endif # Now we want to move to protected mode ... diff -urNp --exclude-from=/home/mdomsch/excludes --minimal ../linux-2.4/arch/i386/config.in linux-2.4-edd-work/arch/i386/config.in --- ../linux-2.4/arch/i386/config.in Mon Jan 6 15:28:32 2003 +++ linux-2.4-edd-work/arch/i386/config.in Sat Jan 4 14:32:40 2003 @@ -186,6 +186,10 @@ tristate '/dev/cpu/microcode - Intel IA3 tristate '/dev/cpu/*/msr - Model-specific register support' CONFIG_X86_MSR tristate '/dev/cpu/*/cpuid - CPU information support' CONFIG_X86_CPUID +if [ "$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 -urNp --exclude-from=/home/mdomsch/excludes --minimal ../linux-2.4/arch/i386/defconfig linux-2.4-edd-work/arch/i386/defconfig --- ../linux-2.4/arch/i386/defconfig Mon Jan 6 15:28:32 2003 +++ linux-2.4-edd-work/arch/i386/defconfig Sat Jan 4 14:32:40 2003 @@ -56,6 +56,7 @@ CONFIG_X86_MCE=y # 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 -urNp --exclude-from=/home/mdomsch/excludes --minimal ../linux-2.4/arch/i386/kernel/Makefile linux-2.4-edd-work/arch/i386/kernel/Makefile --- ../linux-2.4/arch/i386/kernel/Makefile Mon Jan 6 15:28:32 2003 +++ linux-2.4-edd-work/arch/i386/kernel/Makefile Sat Jan 4 14:32:40 2003 @@ -40,5 +40,6 @@ obj-$(CONFIG_SMP) += smp.o smpboot.o tr obj-$(CONFIG_X86_LOCAL_APIC) += mpparse.o apic.o nmi.o obj-$(CONFIG_X86_IO_APIC) += io_apic.o acpitable.o obj-$(CONFIG_X86_VISWS_APIC) += visws_apic.o +obj-$(CONFIG_EDD) += edd.o include $(TOPDIR)/Rules.make diff -urNp --exclude-from=/home/mdomsch/excludes --minimal ../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 Mon Jan 6 15:28:44 2003 @@ -0,0 +1,673 @@ +/* + * linux/arch/i386/kernel/edd.c + * Copyright (C) 2002 Dell Computer Corporation + * by Matt Domsch <Matt_Domsch@dell.com> + * + * 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 driverfs. + * + * 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: + * - Convert to using /proc instead of driverfs + * - 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@Dell.com>"); +MODULE_DESCRIPTION("proc interface to BIOS EDD information"); +MODULE_LICENSE("GPL"); + +#define EDD_VERSION "0.08 2003-Jan-05" +#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 driverfs 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 -urNp --exclude-from=/home/mdomsch/excludes --minimal ../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 Mon Jan 6 15:28:32 2003 +++ linux-2.4-edd-work/arch/i386/kernel/i386_ksyms.c Sat Jan 4 14:32:41 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; @@ -178,4 +179,9 @@ EXPORT_SYMBOL(is_sony_vaio_laptop); #ifdef CONFIG_MULTIQUAD EXPORT_SYMBOL(xquad_portio); +#endif + +#ifdef CONFIG_EDD_MODULE +EXPORT_SYMBOL(edd); +EXPORT_SYMBOL(eddnr); #endif diff -urNp --exclude-from=/home/mdomsch/excludes --minimal ../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 Mon Jan 6 15:28:32 2003 +++ linux-2.4-edd-work/arch/i386/kernel/setup.c Sat Jan 4 14:32:41 2003 @@ -115,6 +115,7 @@ #include <asm/dma.h> #include <asm/mpspec.h> #include <asm/mmu_context.h> +#include <asm/edd.h> /* * Machine setup.. */ @@ -193,6 +194,8 @@ int enable_acpi_smp_table; #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 @@ -693,6 +696,23 @@ static int __init copy_e820_map(struct e return 0; } +#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) +unsigned char eddnr; +struct edd_info edd[EDDNR]; +/** + * 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. @@ -1105,6 +1125,7 @@ void __init setup_arch(char **cmdline_p) rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); #endif setup_memory_region(); + copy_edd(); if (!MOUNT_ROOT_RDONLY) root_mountflags &= ~MS_RDONLY; diff -urNp --exclude-from=/home/mdomsch/excludes --minimal ../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 Sat Jan 4 14:33:36 2003 @@ -0,0 +1,172 @@ +/* + * linux/include/asm-i386/edd.h + * Copyright (C) 2002 Dell Computer Corporation + * by Matt Domsch <Matt_Domsch@dell.com> + * + * 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[EDDNR]; +extern unsigned char eddnr; +#endif /*!__ASSEMBLY__ */ + +#endif /* _ASM_I386_EDD_H */
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