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![Jesper Juhl](/assets/img/avatar_default.png)
This is the remaining misc drivers/ part of the big kfree cleanup patch. Remove pointless checks for NULL prior to calling kfree() in misc files in drivers/. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Acked-by: Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org> Acked-by: Roland Dreier <rolandd@cisco.com> Acked-by: Pierre Ossman <drzeus@drzeus.cx> Acked-by: Jean Delvare <khali@linux-fr.org> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Acked-by: Len Brown <len.brown@intel.com> Acked-by: "Antonino A. Daplas" <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
1462 lines
38 KiB
C
1462 lines
38 KiB
C
/*
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* linux/drivers/ide/ide-probe.c Version 1.11 Mar 05, 2003
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*
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* Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
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*/
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/*
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* Mostly written by Mark Lord <mlord@pobox.com>
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* and Gadi Oxman <gadio@netvision.net.il>
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* and Andre Hedrick <andre@linux-ide.org>
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*
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* See linux/MAINTAINERS for address of current maintainer.
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*
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* This is the IDE probe module, as evolved from hd.c and ide.c.
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*
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* Version 1.00 move drive probing code from ide.c to ide-probe.c
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* Version 1.01 fix compilation problem for m68k
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* Version 1.02 increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot
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* by Andrea Arcangeli
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* Version 1.03 fix for (hwif->chipset == ide_4drives)
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* Version 1.04 fixed buggy treatments of known flash memory cards
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*
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* Version 1.05 fix for (hwif->chipset == ide_pdc4030)
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* added ide6/7/8/9
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* allowed for secondary flash card to be detectable
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* with new flag : drive->ata_flash : 1;
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* Version 1.06 stream line request queue and prep for cascade project.
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* Version 1.07 max_sect <= 255; slower disks would get behind and
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* then fall over when they get to 256. Paul G.
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* Version 1.10 Update set for new IDE. drive->id is now always
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* valid after probe time even with noprobe
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*/
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#undef REALLY_SLOW_IO /* most systems can safely undef this */
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/timer.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <linux/major.h>
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#include <linux/errno.h>
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#include <linux/genhd.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/ide.h>
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#include <linux/devfs_fs_kernel.h>
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#include <linux/spinlock.h>
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#include <linux/kmod.h>
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#include <linux/pci.h>
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#include <asm/byteorder.h>
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#include <asm/irq.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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/**
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* generic_id - add a generic drive id
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* @drive: drive to make an ID block for
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*
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* Add a fake id field to the drive we are passed. This allows
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* use to skip a ton of NULL checks (which people always miss)
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* and make drive properties unconditional outside of this file
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*/
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static void generic_id(ide_drive_t *drive)
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{
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drive->id->cyls = drive->cyl;
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drive->id->heads = drive->head;
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drive->id->sectors = drive->sect;
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drive->id->cur_cyls = drive->cyl;
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drive->id->cur_heads = drive->head;
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drive->id->cur_sectors = drive->sect;
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}
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static void ide_disk_init_chs(ide_drive_t *drive)
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{
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struct hd_driveid *id = drive->id;
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/* Extract geometry if we did not already have one for the drive */
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if (!drive->cyl || !drive->head || !drive->sect) {
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drive->cyl = drive->bios_cyl = id->cyls;
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drive->head = drive->bios_head = id->heads;
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drive->sect = drive->bios_sect = id->sectors;
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}
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/* Handle logical geometry translation by the drive */
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if ((id->field_valid & 1) && id->cur_cyls &&
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id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) {
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drive->cyl = id->cur_cyls;
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drive->head = id->cur_heads;
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drive->sect = id->cur_sectors;
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}
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/* Use physical geometry if what we have still makes no sense */
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if (drive->head > 16 && id->heads && id->heads <= 16) {
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drive->cyl = id->cyls;
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drive->head = id->heads;
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drive->sect = id->sectors;
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}
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}
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static void ide_disk_init_mult_count(ide_drive_t *drive)
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{
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struct hd_driveid *id = drive->id;
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drive->mult_count = 0;
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if (id->max_multsect) {
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#ifdef CONFIG_IDEDISK_MULTI_MODE
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id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0;
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id->multsect_valid = id->multsect ? 1 : 0;
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drive->mult_req = id->multsect_valid ? id->max_multsect : INITIAL_MULT_COUNT;
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drive->special.b.set_multmode = drive->mult_req ? 1 : 0;
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#else /* original, pre IDE-NFG, per request of AC */
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drive->mult_req = INITIAL_MULT_COUNT;
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if (drive->mult_req > id->max_multsect)
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drive->mult_req = id->max_multsect;
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if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect))
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drive->special.b.set_multmode = 1;
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#endif
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}
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}
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/**
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* drive_is_flashcard - check for compact flash
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* @drive: drive to check
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*
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* CompactFlash cards and their brethern pretend to be removable
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* hard disks, except:
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* (1) they never have a slave unit, and
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* (2) they don't have doorlock mechanisms.
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* This test catches them, and is invoked elsewhere when setting
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* appropriate config bits.
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*
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* FIXME: This treatment is probably applicable for *all* PCMCIA (PC CARD)
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* devices, so in linux 2.3.x we should change this to just treat all
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* PCMCIA drives this way, and get rid of the model-name tests below
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* (too big of an interface change for 2.4.x).
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* At that time, we might also consider parameterizing the timeouts and
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* retries, since these are MUCH faster than mechanical drives. -M.Lord
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*/
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static inline int drive_is_flashcard (ide_drive_t *drive)
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{
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struct hd_driveid *id = drive->id;
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if (drive->removable) {
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if (id->config == 0x848a) return 1; /* CompactFlash */
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if (!strncmp(id->model, "KODAK ATA_FLASH", 15) /* Kodak */
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|| !strncmp(id->model, "Hitachi CV", 10) /* Hitachi */
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|| !strncmp(id->model, "SunDisk SDCFB", 13) /* old SanDisk */
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|| !strncmp(id->model, "SanDisk SDCFB", 13) /* SanDisk */
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|| !strncmp(id->model, "HAGIWARA HPC", 12) /* Hagiwara */
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|| !strncmp(id->model, "LEXAR ATA_FLASH", 15) /* Lexar */
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|| !strncmp(id->model, "ATA_FLASH", 9)) /* Simple Tech */
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{
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return 1; /* yes, it is a flash memory card */
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}
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}
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return 0; /* no, it is not a flash memory card */
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}
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/**
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* do_identify - identify a drive
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* @drive: drive to identify
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* @cmd: command used
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*
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* Called when we have issued a drive identify command to
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* read and parse the results. This function is run with
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* interrupts disabled.
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*/
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static inline void do_identify (ide_drive_t *drive, u8 cmd)
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{
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ide_hwif_t *hwif = HWIF(drive);
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int bswap = 1;
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struct hd_driveid *id;
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id = drive->id;
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/* read 512 bytes of id info */
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hwif->ata_input_data(drive, id, SECTOR_WORDS);
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drive->id_read = 1;
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local_irq_enable();
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ide_fix_driveid(id);
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#if defined (CONFIG_SCSI_EATA_DMA) || defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA)
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/*
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* EATA SCSI controllers do a hardware ATA emulation:
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* Ignore them if there is a driver for them available.
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*/
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if ((id->model[0] == 'P' && id->model[1] == 'M') ||
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(id->model[0] == 'S' && id->model[1] == 'K')) {
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printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model);
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goto err_misc;
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}
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#endif /* CONFIG_SCSI_EATA_DMA || CONFIG_SCSI_EATA_PIO */
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/*
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* WIN_IDENTIFY returns little-endian info,
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* WIN_PIDENTIFY *usually* returns little-endian info.
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*/
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if (cmd == WIN_PIDENTIFY) {
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if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */
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|| (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */
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|| (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */
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/* Vertos drives may still be weird */
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bswap ^= 1;
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}
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ide_fixstring(id->model, sizeof(id->model), bswap);
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ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap);
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ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap);
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if (strstr(id->model, "E X A B Y T E N E S T"))
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goto err_misc;
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/* we depend on this a lot! */
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id->model[sizeof(id->model)-1] = '\0';
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printk("%s: %s, ", drive->name, id->model);
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drive->present = 1;
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drive->dead = 0;
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/*
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* Check for an ATAPI device
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*/
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if (cmd == WIN_PIDENTIFY) {
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u8 type = (id->config >> 8) & 0x1f;
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printk("ATAPI ");
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switch (type) {
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case ide_floppy:
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if (!strstr(id->model, "CD-ROM")) {
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if (!strstr(id->model, "oppy") &&
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!strstr(id->model, "poyp") &&
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!strstr(id->model, "ZIP"))
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printk("cdrom or floppy?, assuming ");
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if (drive->media != ide_cdrom) {
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printk ("FLOPPY");
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drive->removable = 1;
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break;
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}
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}
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/* Early cdrom models used zero */
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type = ide_cdrom;
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case ide_cdrom:
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drive->removable = 1;
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#ifdef CONFIG_PPC
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/* kludge for Apple PowerBook internal zip */
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if (!strstr(id->model, "CD-ROM") &&
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strstr(id->model, "ZIP")) {
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printk ("FLOPPY");
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type = ide_floppy;
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break;
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}
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#endif
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printk ("CD/DVD-ROM");
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break;
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case ide_tape:
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printk ("TAPE");
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break;
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case ide_optical:
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printk ("OPTICAL");
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drive->removable = 1;
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break;
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default:
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printk("UNKNOWN (type %d)", type);
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break;
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}
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printk (" drive\n");
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drive->media = type;
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/* an ATAPI device ignores DRDY */
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drive->ready_stat = 0;
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return;
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}
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/*
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* Not an ATAPI device: looks like a "regular" hard disk
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*/
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if (id->config & (1<<7))
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drive->removable = 1;
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if (drive_is_flashcard(drive))
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drive->is_flash = 1;
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drive->media = ide_disk;
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printk("%s DISK drive\n", (drive->is_flash) ? "CFA" : "ATA" );
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QUIRK_LIST(drive);
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return;
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err_misc:
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kfree(id);
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drive->present = 0;
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return;
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}
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/**
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* actual_try_to_identify - send ata/atapi identify
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* @drive: drive to identify
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* @cmd: command to use
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*
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* try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
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* and waits for a response. It also monitors irqs while this is
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* happening, in hope of automatically determining which one is
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* being used by the interface.
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*
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* Returns: 0 device was identified
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* 1 device timed-out (no response to identify request)
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* 2 device aborted the command (refused to identify itself)
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*/
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static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
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{
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ide_hwif_t *hwif = HWIF(drive);
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int rc;
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unsigned long hd_status;
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unsigned long timeout;
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u8 s = 0, a = 0;
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/* take a deep breath */
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msleep(50);
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if (IDE_CONTROL_REG) {
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a = hwif->INB(IDE_ALTSTATUS_REG);
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s = hwif->INB(IDE_STATUS_REG);
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if ((a ^ s) & ~INDEX_STAT) {
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printk(KERN_INFO "%s: probing with STATUS(0x%02x) instead of "
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"ALTSTATUS(0x%02x)\n", drive->name, s, a);
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/* ancient Seagate drives, broken interfaces */
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hd_status = IDE_STATUS_REG;
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} else {
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/* use non-intrusive polling */
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hd_status = IDE_ALTSTATUS_REG;
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}
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} else
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hd_status = IDE_STATUS_REG;
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/* set features register for atapi
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* identify command to be sure of reply
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*/
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if ((cmd == WIN_PIDENTIFY))
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/* disable dma & overlap */
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hwif->OUTB(0, IDE_FEATURE_REG);
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/* ask drive for ID */
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hwif->OUTB(cmd, IDE_COMMAND_REG);
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timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
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timeout += jiffies;
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do {
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if (time_after(jiffies, timeout)) {
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/* drive timed-out */
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return 1;
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}
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/* give drive a breather */
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msleep(50);
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} while ((hwif->INB(hd_status)) & BUSY_STAT);
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/* wait for IRQ and DRQ_STAT */
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msleep(50);
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if (OK_STAT((hwif->INB(IDE_STATUS_REG)), DRQ_STAT, BAD_R_STAT)) {
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unsigned long flags;
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/* local CPU only; some systems need this */
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local_irq_save(flags);
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/* drive returned ID */
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do_identify(drive, cmd);
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/* drive responded with ID */
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rc = 0;
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/* clear drive IRQ */
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(void) hwif->INB(IDE_STATUS_REG);
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local_irq_restore(flags);
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} else {
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/* drive refused ID */
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rc = 2;
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}
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return rc;
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}
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/**
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* try_to_identify - try to identify a drive
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* @drive: drive to probe
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* @cmd: command to use
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*
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* Issue the identify command and then do IRQ probing to
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* complete the identification when needed by finding the
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* IRQ the drive is attached to
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*/
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static int try_to_identify (ide_drive_t *drive, u8 cmd)
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{
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ide_hwif_t *hwif = HWIF(drive);
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int retval;
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int autoprobe = 0;
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unsigned long cookie = 0;
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/*
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* Disable device irq unless we need to
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* probe for it. Otherwise we'll get spurious
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* interrupts during the identify-phase that
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* the irq handler isn't expecting.
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*/
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if (IDE_CONTROL_REG) {
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u8 ctl = drive->ctl | 2;
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if (!hwif->irq) {
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autoprobe = 1;
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cookie = probe_irq_on();
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/* enable device irq */
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ctl &= ~2;
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}
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hwif->OUTB(ctl, IDE_CONTROL_REG);
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}
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retval = actual_try_to_identify(drive, cmd);
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if (autoprobe) {
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int irq;
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/* mask device irq */
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hwif->OUTB(drive->ctl|2, IDE_CONTROL_REG);
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/* clear drive IRQ */
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(void) hwif->INB(IDE_STATUS_REG);
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udelay(5);
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irq = probe_irq_off(cookie);
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if (!hwif->irq) {
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if (irq > 0) {
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hwif->irq = irq;
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} else {
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/* Mmmm.. multiple IRQs..
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* don't know which was ours
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*/
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printk("%s: IRQ probe failed (0x%lx)\n",
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drive->name, cookie);
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}
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}
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}
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return retval;
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}
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|
|
|
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/**
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* do_probe - probe an IDE device
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* @drive: drive to probe
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* @cmd: command to use
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*
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* do_probe() has the difficult job of finding a drive if it exists,
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* without getting hung up if it doesn't exist, without trampling on
|
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* ethernet cards, and without leaving any IRQs dangling to haunt us later.
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*
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* If a drive is "known" to exist (from CMOS or kernel parameters),
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* but does not respond right away, the probe will "hang in there"
|
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* for the maximum wait time (about 30 seconds), otherwise it will
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* exit much more quickly.
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*
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* Returns: 0 device was identified
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* 1 device timed-out (no response to identify request)
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* 2 device aborted the command (refused to identify itself)
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* 3 bad status from device (possible for ATAPI drives)
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* 4 probe was not attempted because failure was obvious
|
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*/
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|
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static int do_probe (ide_drive_t *drive, u8 cmd)
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{
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int rc;
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ide_hwif_t *hwif = HWIF(drive);
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|
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if (drive->present) {
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/* avoid waiting for inappropriate probes */
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if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY))
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return 4;
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}
|
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#ifdef DEBUG
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printk("probing for %s: present=%d, media=%d, probetype=%s\n",
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drive->name, drive->present, drive->media,
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(cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI");
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#endif
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|
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/* needed for some systems
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* (e.g. crw9624 as drive0 with disk as slave)
|
|
*/
|
|
msleep(50);
|
|
SELECT_DRIVE(drive);
|
|
msleep(50);
|
|
if (hwif->INB(IDE_SELECT_REG) != drive->select.all && !drive->present) {
|
|
if (drive->select.b.unit != 0) {
|
|
/* exit with drive0 selected */
|
|
SELECT_DRIVE(&hwif->drives[0]);
|
|
/* allow BUSY_STAT to assert & clear */
|
|
msleep(50);
|
|
}
|
|
/* no i/f present: mmm.. this should be a 4 -ml */
|
|
return 3;
|
|
}
|
|
|
|
if (OK_STAT((hwif->INB(IDE_STATUS_REG)), READY_STAT, BUSY_STAT) ||
|
|
drive->present || cmd == WIN_PIDENTIFY) {
|
|
/* send cmd and wait */
|
|
if ((rc = try_to_identify(drive, cmd))) {
|
|
/* failed: try again */
|
|
rc = try_to_identify(drive,cmd);
|
|
}
|
|
if (hwif->INB(IDE_STATUS_REG) == (BUSY_STAT|READY_STAT))
|
|
return 4;
|
|
|
|
if ((rc == 1 && cmd == WIN_PIDENTIFY) &&
|
|
((drive->autotune == IDE_TUNE_DEFAULT) ||
|
|
(drive->autotune == IDE_TUNE_AUTO))) {
|
|
unsigned long timeout;
|
|
printk("%s: no response (status = 0x%02x), "
|
|
"resetting drive\n", drive->name,
|
|
hwif->INB(IDE_STATUS_REG));
|
|
msleep(50);
|
|
hwif->OUTB(drive->select.all, IDE_SELECT_REG);
|
|
msleep(50);
|
|
hwif->OUTB(WIN_SRST, IDE_COMMAND_REG);
|
|
timeout = jiffies;
|
|
while (((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) &&
|
|
time_before(jiffies, timeout + WAIT_WORSTCASE))
|
|
msleep(50);
|
|
rc = try_to_identify(drive, cmd);
|
|
}
|
|
if (rc == 1)
|
|
printk("%s: no response (status = 0x%02x)\n",
|
|
drive->name, hwif->INB(IDE_STATUS_REG));
|
|
/* ensure drive irq is clear */
|
|
(void) hwif->INB(IDE_STATUS_REG);
|
|
} else {
|
|
/* not present or maybe ATAPI */
|
|
rc = 3;
|
|
}
|
|
if (drive->select.b.unit != 0) {
|
|
/* exit with drive0 selected */
|
|
SELECT_DRIVE(&hwif->drives[0]);
|
|
msleep(50);
|
|
/* ensure drive irq is clear */
|
|
(void) hwif->INB(IDE_STATUS_REG);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
*
|
|
*/
|
|
static void enable_nest (ide_drive_t *drive)
|
|
{
|
|
ide_hwif_t *hwif = HWIF(drive);
|
|
unsigned long timeout;
|
|
|
|
printk("%s: enabling %s -- ", hwif->name, drive->id->model);
|
|
SELECT_DRIVE(drive);
|
|
msleep(50);
|
|
hwif->OUTB(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG);
|
|
timeout = jiffies + WAIT_WORSTCASE;
|
|
do {
|
|
if (time_after(jiffies, timeout)) {
|
|
printk("failed (timeout)\n");
|
|
return;
|
|
}
|
|
msleep(50);
|
|
} while ((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT);
|
|
|
|
msleep(50);
|
|
|
|
if (!OK_STAT((hwif->INB(IDE_STATUS_REG)), 0, BAD_STAT)) {
|
|
printk("failed (status = 0x%02x)\n", hwif->INB(IDE_STATUS_REG));
|
|
} else {
|
|
printk("success\n");
|
|
}
|
|
|
|
/* if !(success||timed-out) */
|
|
if (do_probe(drive, WIN_IDENTIFY) >= 2) {
|
|
/* look for ATAPI device */
|
|
(void) do_probe(drive, WIN_PIDENTIFY);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* probe_for_drives - upper level drive probe
|
|
* @drive: drive to probe for
|
|
*
|
|
* probe_for_drive() tests for existence of a given drive using do_probe()
|
|
* and presents things to the user as needed.
|
|
*
|
|
* Returns: 0 no device was found
|
|
* 1 device was found (note: drive->present might
|
|
* still be 0)
|
|
*/
|
|
|
|
static inline u8 probe_for_drive (ide_drive_t *drive)
|
|
{
|
|
/*
|
|
* In order to keep things simple we have an id
|
|
* block for all drives at all times. If the device
|
|
* is pre ATA or refuses ATA/ATAPI identify we
|
|
* will add faked data to this.
|
|
*
|
|
* Also note that 0 everywhere means "can't do X"
|
|
*/
|
|
|
|
drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL);
|
|
drive->id_read = 0;
|
|
if(drive->id == NULL)
|
|
{
|
|
printk(KERN_ERR "ide: out of memory for id data.\n");
|
|
return 0;
|
|
}
|
|
strcpy(drive->id->model, "UNKNOWN");
|
|
|
|
/* skip probing? */
|
|
if (!drive->noprobe)
|
|
{
|
|
/* if !(success||timed-out) */
|
|
if (do_probe(drive, WIN_IDENTIFY) >= 2) {
|
|
/* look for ATAPI device */
|
|
(void) do_probe(drive, WIN_PIDENTIFY);
|
|
}
|
|
if (strstr(drive->id->model, "E X A B Y T E N E S T"))
|
|
enable_nest(drive);
|
|
if (!drive->present)
|
|
/* drive not found */
|
|
return 0;
|
|
|
|
/* identification failed? */
|
|
if (!drive->id_read) {
|
|
if (drive->media == ide_disk) {
|
|
printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
|
|
drive->name, drive->cyl,
|
|
drive->head, drive->sect);
|
|
} else if (drive->media == ide_cdrom) {
|
|
printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
|
|
} else {
|
|
/* nuke it */
|
|
printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
|
|
drive->present = 0;
|
|
}
|
|
}
|
|
/* drive was found */
|
|
}
|
|
if(!drive->present)
|
|
return 0;
|
|
/* The drive wasn't being helpful. Add generic info only */
|
|
if (drive->id_read == 0) {
|
|
generic_id(drive);
|
|
return 1;
|
|
}
|
|
|
|
if (drive->media == ide_disk) {
|
|
ide_disk_init_chs(drive);
|
|
ide_disk_init_mult_count(drive);
|
|
}
|
|
|
|
return drive->present;
|
|
}
|
|
|
|
static void hwif_release_dev (struct device *dev)
|
|
{
|
|
ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
|
|
|
|
up(&hwif->gendev_rel_sem);
|
|
}
|
|
|
|
static void hwif_register (ide_hwif_t *hwif)
|
|
{
|
|
/* register with global device tree */
|
|
strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE);
|
|
hwif->gendev.driver_data = hwif;
|
|
if (hwif->gendev.parent == NULL) {
|
|
if (hwif->pci_dev)
|
|
hwif->gendev.parent = &hwif->pci_dev->dev;
|
|
else
|
|
/* Would like to do = &device_legacy */
|
|
hwif->gendev.parent = NULL;
|
|
}
|
|
hwif->gendev.release = hwif_release_dev;
|
|
device_register(&hwif->gendev);
|
|
}
|
|
|
|
static int wait_hwif_ready(ide_hwif_t *hwif)
|
|
{
|
|
int rc;
|
|
|
|
printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
|
|
|
|
/* Let HW settle down a bit from whatever init state we
|
|
* come from */
|
|
mdelay(2);
|
|
|
|
/* Wait for BSY bit to go away, spec timeout is 30 seconds,
|
|
* I know of at least one disk who takes 31 seconds, I use 35
|
|
* here to be safe
|
|
*/
|
|
rc = ide_wait_not_busy(hwif, 35000);
|
|
if (rc)
|
|
return rc;
|
|
|
|
/* Now make sure both master & slave are ready */
|
|
SELECT_DRIVE(&hwif->drives[0]);
|
|
hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
|
|
mdelay(2);
|
|
rc = ide_wait_not_busy(hwif, 35000);
|
|
if (rc)
|
|
return rc;
|
|
SELECT_DRIVE(&hwif->drives[1]);
|
|
hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
|
|
mdelay(2);
|
|
rc = ide_wait_not_busy(hwif, 35000);
|
|
|
|
/* Exit function with master reselected (let's be sane) */
|
|
SELECT_DRIVE(&hwif->drives[0]);
|
|
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* ide_undecoded_slave - look for bad CF adapters
|
|
* @hwif: interface
|
|
*
|
|
* Analyse the drives on the interface and attempt to decide if we
|
|
* have the same drive viewed twice. This occurs with crap CF adapters
|
|
* and PCMCIA sometimes.
|
|
*/
|
|
|
|
void ide_undecoded_slave(ide_hwif_t *hwif)
|
|
{
|
|
ide_drive_t *drive0 = &hwif->drives[0];
|
|
ide_drive_t *drive1 = &hwif->drives[1];
|
|
|
|
if (drive0->present == 0 || drive1->present == 0)
|
|
return;
|
|
|
|
/* If the models don't match they are not the same product */
|
|
if (strcmp(drive0->id->model, drive1->id->model))
|
|
return;
|
|
|
|
/* Serial numbers do not match */
|
|
if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20))
|
|
return;
|
|
|
|
/* No serial number, thankfully very rare for CF */
|
|
if (drive0->id->serial_no[0] == 0)
|
|
return;
|
|
|
|
/* Appears to be an IDE flash adapter with decode bugs */
|
|
printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
|
|
|
|
drive1->present = 0;
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ide_undecoded_slave);
|
|
|
|
/*
|
|
* This routine only knows how to look for drive units 0 and 1
|
|
* on an interface, so any setting of MAX_DRIVES > 2 won't work here.
|
|
*/
|
|
static void probe_hwif(ide_hwif_t *hwif)
|
|
{
|
|
unsigned int unit;
|
|
unsigned long flags;
|
|
unsigned int irqd;
|
|
|
|
if (hwif->noprobe)
|
|
return;
|
|
|
|
if ((hwif->chipset != ide_4drives || !hwif->mate || !hwif->mate->present) &&
|
|
(ide_hwif_request_regions(hwif))) {
|
|
u16 msgout = 0;
|
|
for (unit = 0; unit < MAX_DRIVES; ++unit) {
|
|
ide_drive_t *drive = &hwif->drives[unit];
|
|
if (drive->present) {
|
|
drive->present = 0;
|
|
printk(KERN_ERR "%s: ERROR, PORTS ALREADY IN USE\n",
|
|
drive->name);
|
|
msgout = 1;
|
|
}
|
|
}
|
|
if (!msgout)
|
|
printk(KERN_ERR "%s: ports already in use, skipping probe\n",
|
|
hwif->name);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* We must always disable IRQ, as probe_for_drive will assert IRQ, but
|
|
* we'll install our IRQ driver much later...
|
|
*/
|
|
irqd = hwif->irq;
|
|
if (irqd)
|
|
disable_irq(hwif->irq);
|
|
|
|
local_irq_set(flags);
|
|
|
|
/* This is needed on some PPCs and a bunch of BIOS-less embedded
|
|
* platforms. Typical cases are:
|
|
*
|
|
* - The firmware hard reset the disk before booting the kernel,
|
|
* the drive is still doing it's poweron-reset sequence, that
|
|
* can take up to 30 seconds
|
|
* - The firmware does nothing (or no firmware), the device is
|
|
* still in POST state (same as above actually).
|
|
* - Some CD/DVD/Writer combo drives tend to drive the bus during
|
|
* their reset sequence even when they are non-selected slave
|
|
* devices, thus preventing discovery of the main HD
|
|
*
|
|
* Doing this wait-for-busy should not harm any existing configuration
|
|
* (at least things won't be worse than what current code does, that
|
|
* is blindly go & talk to the drive) and fix some issues like the
|
|
* above.
|
|
*
|
|
* BenH.
|
|
*/
|
|
if (wait_hwif_ready(hwif) == -EBUSY)
|
|
printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
|
|
|
|
/*
|
|
* Second drive should only exist if first drive was found,
|
|
* but a lot of cdrom drives are configured as single slaves.
|
|
*/
|
|
for (unit = 0; unit < MAX_DRIVES; ++unit) {
|
|
ide_drive_t *drive = &hwif->drives[unit];
|
|
drive->dn = (hwif->channel ? 2 : 0) + unit;
|
|
(void) probe_for_drive(drive);
|
|
if (drive->present && !hwif->present) {
|
|
hwif->present = 1;
|
|
if (hwif->chipset != ide_4drives ||
|
|
!hwif->mate ||
|
|
!hwif->mate->present) {
|
|
hwif_register(hwif);
|
|
}
|
|
}
|
|
}
|
|
if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) {
|
|
unsigned long timeout = jiffies + WAIT_WORSTCASE;
|
|
u8 stat;
|
|
|
|
printk(KERN_WARNING "%s: reset\n", hwif->name);
|
|
hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]);
|
|
udelay(10);
|
|
hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
|
|
do {
|
|
msleep(50);
|
|
stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
|
|
} while ((stat & BUSY_STAT) && time_after(timeout, jiffies));
|
|
|
|
}
|
|
local_irq_restore(flags);
|
|
/*
|
|
* Use cached IRQ number. It might be (and is...) changed by probe
|
|
* code above
|
|
*/
|
|
if (irqd)
|
|
enable_irq(irqd);
|
|
|
|
if (!hwif->present) {
|
|
ide_hwif_release_regions(hwif);
|
|
return;
|
|
}
|
|
|
|
for (unit = 0; unit < MAX_DRIVES; ++unit) {
|
|
ide_drive_t *drive = &hwif->drives[unit];
|
|
|
|
if (drive->present) {
|
|
if (hwif->tuneproc != NULL &&
|
|
drive->autotune == IDE_TUNE_AUTO)
|
|
/* auto-tune PIO mode */
|
|
hwif->tuneproc(drive, 255);
|
|
|
|
if (drive->autotune != IDE_TUNE_DEFAULT &&
|
|
drive->autotune != IDE_TUNE_AUTO)
|
|
continue;
|
|
|
|
drive->nice1 = 1;
|
|
|
|
/*
|
|
* MAJOR HACK BARF :-/
|
|
*
|
|
* FIXME: chipsets own this cruft!
|
|
*/
|
|
/*
|
|
* Move here to prevent module loading clashing.
|
|
*/
|
|
// drive->autodma = hwif->autodma;
|
|
if (hwif->ide_dma_check) {
|
|
/*
|
|
* Force DMAing for the beginning of the check.
|
|
* Some chipsets appear to do interesting
|
|
* things, if not checked and cleared.
|
|
* PARANOIA!!!
|
|
*/
|
|
hwif->ide_dma_off_quietly(drive);
|
|
#ifdef CONFIG_IDEDMA_ONLYDISK
|
|
if (drive->media == ide_disk)
|
|
#endif
|
|
hwif->ide_dma_check(drive);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static int hwif_init(ide_hwif_t *hwif);
|
|
|
|
int probe_hwif_init_with_fixup(ide_hwif_t *hwif, void (*fixup)(ide_hwif_t *hwif))
|
|
{
|
|
probe_hwif(hwif);
|
|
|
|
if (fixup)
|
|
fixup(hwif);
|
|
|
|
if (!hwif_init(hwif)) {
|
|
printk(KERN_INFO "%s: failed to initialize IDE interface\n",
|
|
hwif->name);
|
|
return -1;
|
|
}
|
|
|
|
if (hwif->present) {
|
|
u16 unit = 0;
|
|
for (unit = 0; unit < MAX_DRIVES; ++unit) {
|
|
ide_drive_t *drive = &hwif->drives[unit];
|
|
/* For now don't attach absent drives, we may
|
|
want them on default or a new "empty" class
|
|
for hotplug reprobing ? */
|
|
if (drive->present) {
|
|
device_register(&drive->gendev);
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int probe_hwif_init(ide_hwif_t *hwif)
|
|
{
|
|
return probe_hwif_init_with_fixup(hwif, NULL);
|
|
}
|
|
|
|
EXPORT_SYMBOL(probe_hwif_init);
|
|
|
|
#if MAX_HWIFS > 1
|
|
/*
|
|
* save_match() is used to simplify logic in init_irq() below.
|
|
*
|
|
* A loophole here is that we may not know about a particular
|
|
* hwif's irq until after that hwif is actually probed/initialized..
|
|
* This could be a problem for the case where an hwif is on a
|
|
* dual interface that requires serialization (eg. cmd640) and another
|
|
* hwif using one of the same irqs is initialized beforehand.
|
|
*
|
|
* This routine detects and reports such situations, but does not fix them.
|
|
*/
|
|
static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match)
|
|
{
|
|
ide_hwif_t *m = *match;
|
|
|
|
if (m && m->hwgroup && m->hwgroup != new->hwgroup) {
|
|
if (!new->hwgroup)
|
|
return;
|
|
printk("%s: potential irq problem with %s and %s\n",
|
|
hwif->name, new->name, m->name);
|
|
}
|
|
if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */
|
|
*match = new;
|
|
}
|
|
#endif /* MAX_HWIFS > 1 */
|
|
|
|
/*
|
|
* init request queue
|
|
*/
|
|
static int ide_init_queue(ide_drive_t *drive)
|
|
{
|
|
request_queue_t *q;
|
|
ide_hwif_t *hwif = HWIF(drive);
|
|
int max_sectors = 256;
|
|
int max_sg_entries = PRD_ENTRIES;
|
|
|
|
/*
|
|
* Our default set up assumes the normal IDE case,
|
|
* that is 64K segmenting, standard PRD setup
|
|
* and LBA28. Some drivers then impose their own
|
|
* limits and LBA48 we could raise it but as yet
|
|
* do not.
|
|
*/
|
|
|
|
q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif));
|
|
if (!q)
|
|
return 1;
|
|
|
|
q->queuedata = drive;
|
|
blk_queue_segment_boundary(q, 0xffff);
|
|
|
|
if (!hwif->rqsize) {
|
|
if (hwif->no_lba48 || hwif->no_lba48_dma)
|
|
hwif->rqsize = 256;
|
|
else
|
|
hwif->rqsize = 65536;
|
|
}
|
|
if (hwif->rqsize < max_sectors)
|
|
max_sectors = hwif->rqsize;
|
|
blk_queue_max_sectors(q, max_sectors);
|
|
|
|
#ifdef CONFIG_PCI
|
|
/* When we have an IOMMU, we may have a problem where pci_map_sg()
|
|
* creates segments that don't completely match our boundary
|
|
* requirements and thus need to be broken up again. Because it
|
|
* doesn't align properly either, we may actually have to break up
|
|
* to more segments than what was we got in the first place, a max
|
|
* worst case is twice as many.
|
|
* This will be fixed once we teach pci_map_sg() about our boundary
|
|
* requirements, hopefully soon. *FIXME*
|
|
*/
|
|
if (!PCI_DMA_BUS_IS_PHYS)
|
|
max_sg_entries >>= 1;
|
|
#endif /* CONFIG_PCI */
|
|
|
|
blk_queue_max_hw_segments(q, max_sg_entries);
|
|
blk_queue_max_phys_segments(q, max_sg_entries);
|
|
|
|
/* assign drive queue */
|
|
drive->queue = q;
|
|
|
|
/* needs drive->queue to be set */
|
|
ide_toggle_bounce(drive, 1);
|
|
|
|
/* enable led activity for disk drives only */
|
|
if (drive->media == ide_disk && hwif->led_act)
|
|
blk_queue_activity_fn(q, hwif->led_act, drive);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This routine sets up the irq for an ide interface, and creates a new
|
|
* hwgroup for the irq/hwif if none was previously assigned.
|
|
*
|
|
* Much of the code is for correctly detecting/handling irq sharing
|
|
* and irq serialization situations. This is somewhat complex because
|
|
* it handles static as well as dynamic (PCMCIA) IDE interfaces.
|
|
*
|
|
* The SA_INTERRUPT in sa_flags means ide_intr() is always entered with
|
|
* interrupts completely disabled. This can be bad for interrupt latency,
|
|
* but anything else has led to problems on some machines. We re-enable
|
|
* interrupts as much as we can safely do in most places.
|
|
*/
|
|
static int init_irq (ide_hwif_t *hwif)
|
|
{
|
|
unsigned int index;
|
|
ide_hwgroup_t *hwgroup;
|
|
ide_hwif_t *match = NULL;
|
|
|
|
|
|
BUG_ON(in_interrupt());
|
|
BUG_ON(irqs_disabled());
|
|
BUG_ON(hwif == NULL);
|
|
|
|
down(&ide_cfg_sem);
|
|
hwif->hwgroup = NULL;
|
|
#if MAX_HWIFS > 1
|
|
/*
|
|
* Group up with any other hwifs that share our irq(s).
|
|
*/
|
|
for (index = 0; index < MAX_HWIFS; index++) {
|
|
ide_hwif_t *h = &ide_hwifs[index];
|
|
if (h->hwgroup) { /* scan only initialized hwif's */
|
|
if (hwif->irq == h->irq) {
|
|
hwif->sharing_irq = h->sharing_irq = 1;
|
|
if (hwif->chipset != ide_pci ||
|
|
h->chipset != ide_pci) {
|
|
save_match(hwif, h, &match);
|
|
}
|
|
}
|
|
if (hwif->serialized) {
|
|
if (hwif->mate && hwif->mate->irq == h->irq)
|
|
save_match(hwif, h, &match);
|
|
}
|
|
if (h->serialized) {
|
|
if (h->mate && hwif->irq == h->mate->irq)
|
|
save_match(hwif, h, &match);
|
|
}
|
|
}
|
|
}
|
|
#endif /* MAX_HWIFS > 1 */
|
|
/*
|
|
* If we are still without a hwgroup, then form a new one
|
|
*/
|
|
if (match) {
|
|
hwgroup = match->hwgroup;
|
|
hwif->hwgroup = hwgroup;
|
|
/*
|
|
* Link us into the hwgroup.
|
|
* This must be done early, do ensure that unexpected_intr
|
|
* can find the hwif and prevent irq storms.
|
|
* No drives are attached to the new hwif, choose_drive
|
|
* can't do anything stupid (yet).
|
|
* Add ourself as the 2nd entry to the hwgroup->hwif
|
|
* linked list, the first entry is the hwif that owns
|
|
* hwgroup->handler - do not change that.
|
|
*/
|
|
spin_lock_irq(&ide_lock);
|
|
hwif->next = hwgroup->hwif->next;
|
|
hwgroup->hwif->next = hwif;
|
|
spin_unlock_irq(&ide_lock);
|
|
} else {
|
|
hwgroup = kmalloc_node(sizeof(ide_hwgroup_t), GFP_KERNEL,
|
|
hwif_to_node(hwif->drives[0].hwif));
|
|
if (!hwgroup)
|
|
goto out_up;
|
|
|
|
hwif->hwgroup = hwgroup;
|
|
|
|
memset(hwgroup, 0, sizeof(ide_hwgroup_t));
|
|
hwgroup->hwif = hwif->next = hwif;
|
|
hwgroup->rq = NULL;
|
|
hwgroup->handler = NULL;
|
|
hwgroup->drive = NULL;
|
|
hwgroup->busy = 0;
|
|
init_timer(&hwgroup->timer);
|
|
hwgroup->timer.function = &ide_timer_expiry;
|
|
hwgroup->timer.data = (unsigned long) hwgroup;
|
|
}
|
|
|
|
/*
|
|
* Allocate the irq, if not already obtained for another hwif
|
|
*/
|
|
if (!match || match->irq != hwif->irq) {
|
|
int sa = SA_INTERRUPT;
|
|
#if defined(__mc68000__) || defined(CONFIG_APUS)
|
|
sa = SA_SHIRQ;
|
|
#endif /* __mc68000__ || CONFIG_APUS */
|
|
|
|
if (IDE_CHIPSET_IS_PCI(hwif->chipset)) {
|
|
sa = SA_SHIRQ;
|
|
#ifndef CONFIG_IDEPCI_SHARE_IRQ
|
|
sa |= SA_INTERRUPT;
|
|
#endif /* CONFIG_IDEPCI_SHARE_IRQ */
|
|
}
|
|
|
|
if (hwif->io_ports[IDE_CONTROL_OFFSET])
|
|
/* clear nIEN */
|
|
hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]);
|
|
|
|
if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup))
|
|
goto out_unlink;
|
|
}
|
|
|
|
/*
|
|
* For any present drive:
|
|
* - allocate the block device queue
|
|
* - link drive into the hwgroup
|
|
*/
|
|
for (index = 0; index < MAX_DRIVES; ++index) {
|
|
ide_drive_t *drive = &hwif->drives[index];
|
|
if (!drive->present)
|
|
continue;
|
|
if (ide_init_queue(drive)) {
|
|
printk(KERN_ERR "ide: failed to init %s\n",drive->name);
|
|
continue;
|
|
}
|
|
spin_lock_irq(&ide_lock);
|
|
if (!hwgroup->drive) {
|
|
/* first drive for hwgroup. */
|
|
drive->next = drive;
|
|
hwgroup->drive = drive;
|
|
hwgroup->hwif = HWIF(hwgroup->drive);
|
|
} else {
|
|
drive->next = hwgroup->drive->next;
|
|
hwgroup->drive->next = drive;
|
|
}
|
|
spin_unlock_irq(&ide_lock);
|
|
}
|
|
|
|
#if !defined(__mc68000__) && !defined(CONFIG_APUS) && !defined(__sparc__)
|
|
printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
|
|
hwif->io_ports[IDE_DATA_OFFSET],
|
|
hwif->io_ports[IDE_DATA_OFFSET]+7,
|
|
hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq);
|
|
#elif defined(__sparc__)
|
|
printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %s", hwif->name,
|
|
hwif->io_ports[IDE_DATA_OFFSET],
|
|
hwif->io_ports[IDE_DATA_OFFSET]+7,
|
|
hwif->io_ports[IDE_CONTROL_OFFSET], __irq_itoa(hwif->irq));
|
|
#else
|
|
printk("%s at 0x%08lx on irq %d", hwif->name,
|
|
hwif->io_ports[IDE_DATA_OFFSET], hwif->irq);
|
|
#endif /* __mc68000__ && CONFIG_APUS */
|
|
if (match)
|
|
printk(" (%sed with %s)",
|
|
hwif->sharing_irq ? "shar" : "serializ", match->name);
|
|
printk("\n");
|
|
up(&ide_cfg_sem);
|
|
return 0;
|
|
out_unlink:
|
|
spin_lock_irq(&ide_lock);
|
|
if (hwif->next == hwif) {
|
|
BUG_ON(match);
|
|
BUG_ON(hwgroup->hwif != hwif);
|
|
kfree(hwgroup);
|
|
} else {
|
|
ide_hwif_t *g;
|
|
g = hwgroup->hwif;
|
|
while (g->next != hwif)
|
|
g = g->next;
|
|
g->next = hwif->next;
|
|
if (hwgroup->hwif == hwif) {
|
|
/* Impossible. */
|
|
printk(KERN_ERR "Duh. Uninitialized hwif listed as active hwif.\n");
|
|
hwgroup->hwif = g;
|
|
}
|
|
BUG_ON(hwgroup->hwif == hwif);
|
|
}
|
|
spin_unlock_irq(&ide_lock);
|
|
out_up:
|
|
up(&ide_cfg_sem);
|
|
return 1;
|
|
}
|
|
|
|
static int ata_lock(dev_t dev, void *data)
|
|
{
|
|
/* FIXME: we want to pin hwif down */
|
|
return 0;
|
|
}
|
|
|
|
static struct kobject *ata_probe(dev_t dev, int *part, void *data)
|
|
{
|
|
ide_hwif_t *hwif = data;
|
|
int unit = *part >> PARTN_BITS;
|
|
ide_drive_t *drive = &hwif->drives[unit];
|
|
if (!drive->present)
|
|
return NULL;
|
|
|
|
if (drive->media == ide_disk)
|
|
request_module("ide-disk");
|
|
if (drive->scsi)
|
|
request_module("ide-scsi");
|
|
if (drive->media == ide_cdrom || drive->media == ide_optical)
|
|
request_module("ide-cd");
|
|
if (drive->media == ide_tape)
|
|
request_module("ide-tape");
|
|
if (drive->media == ide_floppy)
|
|
request_module("ide-floppy");
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct kobject *exact_match(dev_t dev, int *part, void *data)
|
|
{
|
|
struct gendisk *p = data;
|
|
*part &= (1 << PARTN_BITS) - 1;
|
|
return &p->kobj;
|
|
}
|
|
|
|
static int exact_lock(dev_t dev, void *data)
|
|
{
|
|
struct gendisk *p = data;
|
|
|
|
if (!get_disk(p))
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
void ide_register_region(struct gendisk *disk)
|
|
{
|
|
blk_register_region(MKDEV(disk->major, disk->first_minor),
|
|
disk->minors, NULL, exact_match, exact_lock, disk);
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ide_register_region);
|
|
|
|
void ide_unregister_region(struct gendisk *disk)
|
|
{
|
|
blk_unregister_region(MKDEV(disk->major, disk->first_minor),
|
|
disk->minors);
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ide_unregister_region);
|
|
|
|
void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
|
|
{
|
|
ide_hwif_t *hwif = drive->hwif;
|
|
unsigned int unit = (drive->select.all >> 4) & 1;
|
|
|
|
disk->major = hwif->major;
|
|
disk->first_minor = unit << PARTN_BITS;
|
|
sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
|
|
disk->queue = drive->queue;
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ide_init_disk);
|
|
|
|
static void ide_remove_drive_from_hwgroup(ide_drive_t *drive)
|
|
{
|
|
ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
|
|
|
|
if (drive == drive->next) {
|
|
/* special case: last drive from hwgroup. */
|
|
BUG_ON(hwgroup->drive != drive);
|
|
hwgroup->drive = NULL;
|
|
} else {
|
|
ide_drive_t *walk;
|
|
|
|
walk = hwgroup->drive;
|
|
while (walk->next != drive)
|
|
walk = walk->next;
|
|
walk->next = drive->next;
|
|
if (hwgroup->drive == drive) {
|
|
hwgroup->drive = drive->next;
|
|
hwgroup->hwif = hwgroup->drive->hwif;
|
|
}
|
|
}
|
|
BUG_ON(hwgroup->drive == drive);
|
|
}
|
|
|
|
static void drive_release_dev (struct device *dev)
|
|
{
|
|
ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
|
|
|
|
spin_lock_irq(&ide_lock);
|
|
if (drive->devfs_name[0] != '\0') {
|
|
devfs_remove(drive->devfs_name);
|
|
drive->devfs_name[0] = '\0';
|
|
}
|
|
ide_remove_drive_from_hwgroup(drive);
|
|
kfree(drive->id);
|
|
drive->id = NULL;
|
|
drive->present = 0;
|
|
/* Messed up locking ... */
|
|
spin_unlock_irq(&ide_lock);
|
|
blk_cleanup_queue(drive->queue);
|
|
spin_lock_irq(&ide_lock);
|
|
drive->queue = NULL;
|
|
spin_unlock_irq(&ide_lock);
|
|
|
|
up(&drive->gendev_rel_sem);
|
|
}
|
|
|
|
/*
|
|
* init_gendisk() (as opposed to ide_geninit) is called for each major device,
|
|
* after probing for drives, to allocate partition tables and other data
|
|
* structures needed for the routines in genhd.c. ide_geninit() gets called
|
|
* somewhat later, during the partition check.
|
|
*/
|
|
static void init_gendisk (ide_hwif_t *hwif)
|
|
{
|
|
unsigned int unit;
|
|
|
|
for (unit = 0; unit < MAX_DRIVES; ++unit) {
|
|
ide_drive_t * drive = &hwif->drives[unit];
|
|
ide_add_generic_settings(drive);
|
|
snprintf(drive->gendev.bus_id,BUS_ID_SIZE,"%u.%u",
|
|
hwif->index,unit);
|
|
drive->gendev.parent = &hwif->gendev;
|
|
drive->gendev.bus = &ide_bus_type;
|
|
drive->gendev.driver_data = drive;
|
|
drive->gendev.release = drive_release_dev;
|
|
if (drive->present) {
|
|
sprintf(drive->devfs_name, "ide/host%d/bus%d/target%d/lun%d",
|
|
(hwif->channel && hwif->mate) ?
|
|
hwif->mate->index : hwif->index,
|
|
hwif->channel, unit, drive->lun);
|
|
}
|
|
}
|
|
blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
|
|
THIS_MODULE, ata_probe, ata_lock, hwif);
|
|
}
|
|
|
|
static int hwif_init(ide_hwif_t *hwif)
|
|
{
|
|
int old_irq;
|
|
|
|
/* Return success if no device is connected */
|
|
if (!hwif->present)
|
|
return 1;
|
|
|
|
if (!hwif->irq) {
|
|
if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET])))
|
|
{
|
|
printk("%s: DISABLED, NO IRQ\n", hwif->name);
|
|
return (hwif->present = 0);
|
|
}
|
|
}
|
|
#ifdef CONFIG_BLK_DEV_HD
|
|
if (hwif->irq == HD_IRQ && hwif->io_ports[IDE_DATA_OFFSET] != HD_DATA) {
|
|
printk("%s: CANNOT SHARE IRQ WITH OLD "
|
|
"HARDDISK DRIVER (hd.c)\n", hwif->name);
|
|
return (hwif->present = 0);
|
|
}
|
|
#endif /* CONFIG_BLK_DEV_HD */
|
|
|
|
/* we set it back to 1 if all is ok below */
|
|
hwif->present = 0;
|
|
|
|
if (register_blkdev(hwif->major, hwif->name))
|
|
return 0;
|
|
|
|
if (!hwif->sg_max_nents)
|
|
hwif->sg_max_nents = PRD_ENTRIES;
|
|
|
|
hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
|
|
GFP_KERNEL);
|
|
if (!hwif->sg_table) {
|
|
printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
|
|
goto out;
|
|
}
|
|
|
|
if (init_irq(hwif) == 0)
|
|
goto done;
|
|
|
|
old_irq = hwif->irq;
|
|
/*
|
|
* It failed to initialise. Find the default IRQ for
|
|
* this port and try that.
|
|
*/
|
|
if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) {
|
|
printk("%s: Disabled unable to get IRQ %d.\n",
|
|
hwif->name, old_irq);
|
|
goto out;
|
|
}
|
|
if (init_irq(hwif)) {
|
|
printk("%s: probed IRQ %d and default IRQ %d failed.\n",
|
|
hwif->name, old_irq, hwif->irq);
|
|
goto out;
|
|
}
|
|
printk("%s: probed IRQ %d failed, using default.\n",
|
|
hwif->name, hwif->irq);
|
|
|
|
done:
|
|
init_gendisk(hwif);
|
|
hwif->present = 1; /* success */
|
|
return 1;
|
|
|
|
out:
|
|
unregister_blkdev(hwif->major, hwif->name);
|
|
return 0;
|
|
}
|
|
|
|
int ideprobe_init (void)
|
|
{
|
|
unsigned int index;
|
|
int probe[MAX_HWIFS];
|
|
|
|
memset(probe, 0, MAX_HWIFS * sizeof(int));
|
|
for (index = 0; index < MAX_HWIFS; ++index)
|
|
probe[index] = !ide_hwifs[index].present;
|
|
|
|
for (index = 0; index < MAX_HWIFS; ++index)
|
|
if (probe[index])
|
|
probe_hwif(&ide_hwifs[index]);
|
|
for (index = 0; index < MAX_HWIFS; ++index)
|
|
if (probe[index])
|
|
hwif_init(&ide_hwifs[index]);
|
|
for (index = 0; index < MAX_HWIFS; ++index) {
|
|
if (probe[index]) {
|
|
ide_hwif_t *hwif = &ide_hwifs[index];
|
|
int unit;
|
|
if (!hwif->present)
|
|
continue;
|
|
if (hwif->chipset == ide_unknown || hwif->chipset == ide_forced)
|
|
hwif->chipset = ide_generic;
|
|
for (unit = 0; unit < MAX_DRIVES; ++unit)
|
|
if (hwif->drives[unit].present)
|
|
device_register(&hwif->drives[unit].gendev);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ideprobe_init);
|