Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S275053AbTHQGS0 (ORCPT ); Sun, 17 Aug 2003 02:18:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S275029AbTHQGR6 (ORCPT ); Sun, 17 Aug 2003 02:17:58 -0400 Received: from codepoet.org ([166.70.99.138]:58767 "EHLO winder.codepoet.org") by vger.kernel.org with ESMTP id S275201AbTHQGNu (ORCPT ); Sun, 17 Aug 2003 02:13:50 -0400 Date: Sun, 17 Aug 2003 00:13:52 -0600 From: Erik Andersen To: Marcelo Tosatti Cc: Alan Cox , Andries Brouwer , Bartlomiej Zolnierkiewicz , Linux Kernel Mailing List Subject: [PATCH] 6/8 Backport recent 2.6 IDE updates to 2.4.x Message-ID: <20030817061352.GG17621@codepoet.org> Reply-To: andersen@codepoet.org Mail-Followup-To: Erik Andersen , Marcelo Tosatti , Alan Cox , Andries Brouwer , Bartlomiej Zolnierkiewicz , Linux Kernel Mailing List Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.3.28i X-Operating-System: Linux 2.4.19-rmk7, Rebel-NetWinder(Intel StrongARM 110 rev 3), 185.95 BogoMips X-No-Junk-Mail: I do not want to get *any* junk mail. Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5702 Lines: 188 This patch further refines IDE geometry detection, and takes an easier path toward detecting when a drive happens to support things like lba48, making the code more readable and more consistant. -Erik -- Erik B. Andersen http://codepoet-consulting.com/ --This message was written using 73% post-consumer electrons-- --- linux/drivers/ide/ide-disk.c.orig 2003-08-16 20:51:58.000000000 -0600 +++ linux/drivers/ide/ide-disk.c 2003-08-16 20:56:49.000000000 -0600 @@ -106,11 +106,6 @@ { unsigned long lba_sects, chs_sects, head, tail; - if ((id->command_set_2 & 0x0400) && (id->cfs_enable_2 & 0x0400)) { - printk("48-bit Drive: %llu \n", id->lba_capacity_2); - return 1; - } - /* * The ATA spec tells large drives to return * C/H/S = 16383/16/63 independent of their size. @@ -1139,11 +1134,29 @@ return n; } +/* + * Bits 10 of command_set_1 and cfs_enable_1 must be equal, + * so on non-buggy drives we need test only one. + * However, we should also check whether these fields are valid. + */ +static inline int idedisk_supports_hpa(const struct hd_driveid *id) +{ + return (id->command_set_1 & 0x0400) && (id->cfs_enable_1 & 0x0400); +} + +/* + * The same here. + */ +static inline int idedisk_supports_lba48(const struct hd_driveid *id) +{ + return (id->command_set_2 & 0x0400) && (id->cfs_enable_2 & 0x0400); +} + static inline void idedisk_check_hpa_lba28(ide_drive_t *drive) { unsigned long capacity, set_max; - capacity = drive->id->lba_capacity; + capacity = drive->capacity; set_max = idedisk_read_native_max_address(drive); if (set_max <= capacity) @@ -1158,7 +1171,7 @@ #ifdef CONFIG_IDEDISK_STROKE set_max = idedisk_set_max_address(drive, set_max); if (set_max) { - drive->id->lba_capacity = set_max; + drive->capacity = set_max; printk(KERN_INFO "%s: Host Protected Area disabled.\n", drive->name); } @@ -1169,7 +1182,7 @@ { unsigned long long capacity_2, set_max_ext; - capacity_2 = drive->id->lba_capacity_2; + capacity_2 = drive->capacity48; set_max_ext = idedisk_read_native_max_address_ext(drive); if (set_max_ext <= capacity_2) @@ -1184,7 +1197,8 @@ #ifdef CONFIG_IDEDISK_STROKE set_max_ext = idedisk_set_max_address_ext(drive, set_max_ext); if (set_max_ext) { - drive->id->lba_capacity_2 = set_max_ext; + drive->capacity48 = set_max_ext; + drive->capacity = (unsigned long) set_max_ext; printk(KERN_INFO "%s: Host Protected Area disabled.\n", drive->name); } @@ -1212,32 +1226,21 @@ * If this drive supports the Host Protected Area feature set, * then we may need to change our opinion about the drive's capacity. */ - int hpa = (id->command_set_1 & 0x0400) && (id->cfs_enable_1 & 0x0400); + int hpa = idedisk_supports_hpa(id); - if ((id->command_set_2 & 0x0400) && (id->cfs_enable_2 & 0x0400)) { + if (idedisk_supports_lba48(id)) { /* drive speaks 48-bit LBA */ - unsigned long long capacity_2; - drive->select.b.lba = 1; + drive->capacity48 = id->lba_capacity_2; + drive->capacity = (unsigned long) drive->capacity48; if (hpa) idedisk_check_hpa_lba48(drive); - capacity_2 = id->lba_capacity_2; - drive->head = drive->bios_head = 255; - drive->sect = drive->bios_sect = 63; - drive->cyl = (unsigned int) capacity_2 / (drive->head * drive->sect); - drive->bios_cyl = drive->cyl; - drive->capacity48 = capacity_2; - drive->capacity = (unsigned long) capacity_2; } else if ((id->capability & 2) && lba_capacity_is_ok(id)) { /* drive speaks 28-bit LBA */ - unsigned long capacity; - drive->select.b.lba = 1; + drive->capacity = id->lba_capacity; if (hpa) idedisk_check_hpa_lba28(drive); - capacity = id->lba_capacity; - drive->cyl = capacity / (drive->head * drive->sect); - drive->capacity = capacity; } else { /* drive speaks boring old 28-bit CHS */ drive->capacity = drive->cyl * drive->head * drive->sect; @@ -1246,7 +1249,7 @@ static u64 idedisk_capacity (ide_drive_t *drive) { - if (drive->id->cfs_enable_2 & 0x0400) + if (idedisk_supports_lba48(drive->id)) return (drive->capacity48 - drive->sect0); return (drive->capacity - drive->sect0); } @@ -1572,7 +1575,7 @@ if (HWIF(drive)->addressing) return 0; - if (!(drive->id->cfs_enable_2 & 0x0400)) + if (!idedisk_supports_lba48(drive->id)) return -EIO; drive->addressing = arg; return 0; @@ -1696,19 +1699,28 @@ * by correcting bios_cyls: */ capacity = idedisk_capacity (drive); - if (!drive->forced_geom && drive->bios_sect && drive->bios_head) { - unsigned int cap0 = capacity; /* truncate to 32 bits */ - unsigned int cylsz, cyl; - - if (cap0 != capacity) - drive->bios_cyl = 65535; - else { - cylsz = drive->bios_sect * drive->bios_head; - cyl = cap0 / cylsz; - if (cyl > 65535) - cyl = 65535; - if (cyl > drive->bios_cyl) - drive->bios_cyl = cyl; + if (!drive->forced_geom) { + + if (idedisk_supports_lba48(drive->id)) { + /* compatibility */ + drive->bios_sect = 63; + drive->bios_head = 255; + } + + if (drive->bios_sect && drive->bios_head) { + unsigned int cap0 = capacity; /* truncate to 32 bits */ + unsigned int cylsz, cyl; + + if (cap0 != capacity) + drive->bios_cyl = 65535; + else { + cylsz = drive->bios_sect * drive->bios_head; + cyl = cap0 / cylsz; + if (cyl > 65535) + cyl = 65535; + if (cyl > drive->bios_cyl) + drive->bios_cyl = cyl; + } } } printk(KERN_INFO "%s: %llu sectors (%llu MB)", - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/