litmus-rt.git - The LITMUS^RT kernel.

diff options

Diffstat (limited to 'net/tipc/subscr.c')

-rw-r--r--

1 files changed, 10 insertions, 10 deletions

         /* Refuse subscription if global limit exceeded */
         if (atomic_read(&topsrv.subscription_count) >= tipc_max_subscriptions) {
-                warn("Failed: max %u subscriptions\n", tipc_max_subscriptions);
+                warn("Subscription rejected, subscription limit reached (%u)\n",
+                     tipc_max_subscriptions);
                 subscr_terminate(subscriber);
                 return;
         }
         /* Allocate subscription object */
         sub = kmalloc(sizeof(*sub), GFP_ATOMIC);
-        if (sub == NULL) {
+        if (!sub) {
-                warn("Memory squeeze; ignoring subscription\n");
+                warn("Subscription rejected, no memory\n");
                 subscr_terminate(subscriber);
                 return;
         }
         if ((((sub->filter != TIPC_SUB_PORTS)
               && (sub->filter != TIPC_SUB_SERVICE)))
             || (sub->seq.lower > sub->seq.upper)) {
-                warn("Rejecting illegal subscription %u,%u,%u\n",
+                warn("Subscription rejected, illegal request\n");
-                     sub->seq.type, sub->seq.lower, sub->seq.upper);
                 kfree(sub);
                 subscr_terminate(subscriber);
                 return;
         dbg("subscr_named_msg_event: orig = %x own = %x,\n",
             orig->node, tipc_own_addr);
         if (size && (size != sizeof(struct tipc_subscr))) {
-                warn("Received tipc_subscr of invalid size\n");
+                warn("Subscriber rejected, invalid subscription size\n");
                 return;
         }
         subscriber = kmalloc(sizeof(struct subscriber), GFP_ATOMIC);
         if (subscriber == NULL) {
-                warn("Memory squeeze; ignoring subscriber setup\n");
+                warn("Subscriber rejected, no memory\n");
                 return;
         }
         memset(subscriber, 0, sizeof(struct subscriber));
         INIT_LIST_HEAD(&subscriber->subscriber_list);
         subscriber->ref = tipc_ref_acquire(subscriber, &subscriber->lock);
         if (subscriber->ref == 0) {
-                warn("Failed to acquire subscriber reference\n");
+                warn("Subscriber rejected, reference table exhausted\n");
                 kfree(subscriber);
                 return;
         }
                         NULL,
                         &subscriber->port_ref);
         if (subscriber->port_ref == 0) {
-                warn("Memory squeeze; failed to create subscription port\n");
+                warn("Subscriber rejected, unable to create port\n");
                 tipc_ref_discard(subscriber->ref);
                 kfree(subscriber);
                 return;
         int res = -1;
         memset(&topsrv, 0, sizeof (topsrv));
-        topsrv.lock = SPIN_LOCK_UNLOCKED;
+        spin_lock_init(&topsrv.lock);
         INIT_LIST_HEAD(&topsrv.subscriber_list);
         spin_lock_bh(&topsrv.lock);

/* * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz */ /* * Mostly written by Mark Lord <mlord@pobox.com> * and Gadi Oxman <gadio@netvision.net.il> * and Andre Hedrick <andre@linux-ide.org> * * See linux/MAINTAINERS for address of current maintainer. * * This is the IDE probe module, as evolved from hd.c and ide.c. * * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot * by Andrea Arcangeli */ #include <linux/module.h> #include <linux/types.h> #include <linux/string.h> #include <linux/kernel.h> #include <linux/timer.h> #include <linux/mm.h> #include <linux/interrupt.h> #include <linux/major.h> #include <linux/errno.h> #include <linux/genhd.h> #include <linux/slab.h> #include <linux/delay.h> #include <linux/ide.h> #include <linux/spinlock.h> #include <linux/kmod.h> #include <linux/pci.h> #include <linux/scatterlist.h> #include <asm/byteorder.h> #include <asm/irq.h> #include <asm/uaccess.h> #include <asm/io.h> /** * generic_id - add a generic drive id * @drive: drive to make an ID block for * * Add a fake id field to the drive we are passed. This allows * use to skip a ton of NULL checks (which people always miss) * and make drive properties unconditional outside of this file */ static void generic_id(ide_drive_t *drive) { u16 *id = drive->id; id[ATA_ID_CUR_CYLS] = id[ATA_ID_CYLS] = drive->cyl; id[ATA_ID_CUR_HEADS] = id[ATA_ID_HEADS] = drive->head; id[ATA_ID_CUR_SECTORS] = id[ATA_ID_SECTORS] = drive->sect; } static void ide_disk_init_chs(ide_drive_t *drive) { u16 *id = drive->id; /* Extract geometry if we did not already have one for the drive */ if (!drive->cyl || !drive->head || !drive->sect) { drive->cyl = drive->bios_cyl = id[ATA_ID_CYLS]; drive->head = drive->bios_head = id[ATA_ID_HEADS]; drive->sect = drive->bios_sect = id[ATA_ID_SECTORS]; } /* Handle logical geometry translation by the drive */ if (ata_id_current_chs_valid(id)) { drive->cyl = id[ATA_ID_CUR_CYLS]; drive->head = id[ATA_ID_CUR_HEADS]; drive->sect = id[ATA_ID_CUR_SECTORS]; } /* Use physical geometry if what we have still makes no sense */ if (drive->head > 16 && id[ATA_ID_HEADS] && id[ATA_ID_HEADS] <= 16) { drive->cyl = id[ATA_ID_CYLS]; drive->head = id[ATA_ID_HEADS]; drive->sect = id[ATA_ID_SECTORS]; } } static void ide_disk_init_mult_count(ide_drive_t *drive) { u16 *id = drive->id; u8 max_multsect = id[ATA_ID_MAX_MULTSECT] & 0xff; if (max_multsect) { if ((max_multsect / 2) > 1) id[ATA_ID_MULTSECT] = max_multsect | 0x100; else id[ATA_ID_MULTSECT] &= ~0x1ff; drive->mult_req = id[ATA_ID_MULTSECT] & 0xff; if (drive->mult_req) drive->special_flags |= IDE_SFLAG_SET_MULTMODE; } } static void ide_classify_ata_dev(ide_drive_t *drive) { u16 *id = drive->id; char *m = (char *)&id[ATA_ID_PROD]; int is_cfa = ata_id_is_cfa(id); /* CF devices are *not* removable in Linux definition of the term */ if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7))) drive->dev_flags |= IDE_DFLAG_REMOVABLE; drive->media = ide_disk; if (!ata_id_has_unload(drive->id)) drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; printk(KERN_INFO "%s: %s, %s DISK drive\n", drive->name, m, is_cfa ? "CFA" : "ATA"); } static void ide_classify_atapi_dev(ide_drive_t *drive) { u16 *id = drive->id; char *m = (char *)&id[ATA_ID_PROD]; u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f; printk(KERN_INFO "%s: %s, ATAPI ", drive->name, m); switch (type) { case ide_floppy: if (!strstr(m, "CD-ROM")) { if (!strstr(m, "oppy") && !strstr(m, "poyp") && !strstr(m, "ZIP")) printk(KERN_CONT "cdrom or floppy?, assuming "); if (drive->media != ide_cdrom) { printk(KERN_CONT "FLOPPY"); drive->dev_flags |= IDE_DFLAG_REMOVABLE; break; } } /* Early cdrom models used zero */ type = ide_cdrom; case ide_cdrom: drive->dev_flags |= IDE_DFLAG_REMOVABLE; #ifdef CONFIG_PPC /* kludge for Apple PowerBook internal zip */ if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) { printk(KERN_CONT "FLOPPY"); type = ide_floppy; break; } #endif printk(KERN_CONT "CD/DVD-ROM"); break; case ide_tape: printk(KERN_CONT "TAPE"); break; case ide_optical: printk(KERN_CONT "OPTICAL"); drive->dev_flags |= IDE_DFLAG_REMOVABLE; break; default: printk(KERN_CONT "UNKNOWN (type %d)", type); break; } printk(KERN_CONT " drive\n"); drive->media = type; /* an ATAPI device ignores DRDY */ drive->ready_stat = 0; if (ata_id_cdb_intr(id)) drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT; drive->dev_flags |= IDE_DFLAG_DOORLOCKING; /* we don't do head unloading on ATAPI devices */ drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; } /** * do_identify - identify a drive * @drive: drive to identify * @cmd: command used * @id: buffer for IDENTIFY data * * Called when we have issued a drive identify command to * read and parse the results. This function is run with * interrupts disabled. */ static void do_identify(ide_drive_t *drive, u8 cmd, u16 *id) { ide_hwif_t *hwif = drive->hwif; char *m = (char *)&id[ATA_ID_PROD]; unsigned long flags; int bswap = 1; /* local CPU only; some systems need this */ local_irq_save(flags); /* read 512 bytes of id info */ hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); local_irq_restore(flags); drive->dev_flags |= IDE_DFLAG_ID_READ; #ifdef DEBUG printk(KERN_INFO "%s: dumping identify data\n", drive->name); ide_dump_identify((u8 *)id); #endif ide_fix_driveid(id); /* * ATA_CMD_ID_ATA returns little-endian info, * ATA_CMD_ID_ATAPI *usually* returns little-endian info. */ if (cmd == ATA_CMD_ID_ATAPI) { if ((m[0] == 'N' && m[1] == 'E') || /* NEC */ (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */ (m[0] == 'P' && m[1] == 'i')) /* Pioneer */ /* Vertos drives may still be weird */ bswap ^= 1; } ide_fixstring(m, ATA_ID_PROD_LEN, bswap); ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap); ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap); /* we depend on this a lot! */ m[ATA_ID_PROD_LEN - 1] = '\0'; if (strstr(m, "E X A B Y T E N E S T")) drive->dev_flags &= ~IDE_DFLAG_PRESENT; else drive->dev_flags |= IDE_DFLAG_PRESENT; } /** * ide_dev_read_id - send ATA/ATAPI IDENTIFY command * @drive: drive to identify * @cmd: command to use * @id: buffer for IDENTIFY data * @irq_ctx: flag set when called from the IRQ context * * Sends an ATA(PI) IDENTIFY request to a drive and waits for a response. * * Returns: 0 device was identified * 1 device timed-out (no response to identify request) * 2 device aborted the command (refused to identify itself) */ int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id, int irq_ctx) { ide_hwif_t *hwif = drive->hwif; struct ide_io_ports *io_ports = &hwif->io_ports; const struct ide_tp_ops *tp_ops = hwif->tp_ops; int use_altstatus = 0, rc; unsigned long timeout; u8 s = 0, a = 0; /* * Disable device IRQ. Otherwise we'll get spurious interrupts * during the identify phase that the IRQ handler isn't expecting. */ if (io_ports->ctl_addr) tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS); /* take a deep breath */ if (irq_ctx) mdelay(50); else msleep(50); if (io_ports->ctl_addr && (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) { a = tp_ops->read_altstatus(hwif); s = tp_ops->read_status(hwif); if ((a ^ s) & ~ATA_IDX) /* ancient Seagate drives, broken interfaces */ printk(KERN_INFO "%s: probing with STATUS(0x%02x) " "instead of ALTSTATUS(0x%02x)\n", drive->name, s, a); else /* use non-intrusive polling */ use_altstatus = 1; } /* set features register for atapi * identify command to be sure of reply */ if (cmd == ATA_CMD_ID_ATAPI) { struct ide_taskfile tf; memset(&tf, 0, sizeof(tf)); /* disable DMA & overlap */ tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE); } /* ask drive for ID */ tp_ops->exec_command(hwif, cmd); timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; /* wait for IRQ and ATA_DRQ */ if (irq_ctx) { rc = __ide_wait_stat(drive, ATA_DRQ, BAD_R_STAT, timeout, &s); if (rc) return 1; } else { rc = ide_busy_sleep(drive, timeout, use_altstatus); if (rc) return 1; msleep(50); s = tp_ops->read_status(hwif); } if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { /* drive returned ID */ do_identify(drive, cmd, id); /* drive responded with ID */ rc = 0; /* clear drive IRQ */ (void)tp_ops->read_status(hwif); } else { /* drive refused ID */ rc = 2; } return rc; } int ide_busy_sleep(ide_drive_t *drive, unsigned long timeout, int altstatus) { ide_hwif_t *hwif = drive->hwif; u8 stat; timeout += jiffies; do { msleep(50); /* give drive a breather */ stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) : hwif->tp_ops->read_status(hwif); if ((stat & ATA_BUSY) == 0) return 0; } while (time_before(jiffies, timeout)); printk(KERN_ERR "%s: timeout in %s\n", drive->name, __func__); return 1; /* drive timed-out */ } static u8 ide_read_device(ide_drive_t *drive) { struct ide_taskfile tf; drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_DEVICE); return tf.device; } /** * do_probe - probe an IDE device * @drive: drive to probe * @cmd: command to use * * do_probe() has the difficult job of finding a drive if it exists, * without getting hung up if it doesn't exist, without trampling on * ethernet cards, and without leaving any IRQs dangling to haunt us later. * * If a drive is "known" to exist (from CMOS or kernel parameters), * but does not respond right away, the probe will "hang in there" * for the maximum wait time (about 30 seconds), otherwise it will * exit much more quickly. * * Returns: 0 device was identified * 1 device timed-out (no response to identify request) * 2 device aborted the command (refused to identify itself) * 3 bad status from device (possible for ATAPI drives) * 4 probe was not attempted because failure was obvious */ static int do_probe (ide_drive_t *drive, u8 cmd) { ide_hwif_t *hwif = drive->hwif; const struct ide_tp_ops *tp_ops = hwif->tp_ops; u16 *id = drive->id; int rc; u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; /* avoid waiting for inappropriate probes */ if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) return 4; #ifdef DEBUG printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", drive->name, present, drive->media, (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); #endif /* needed for some systems * (e.g. crw9624 as drive0 with disk as slave) */ msleep(50); tp_ops->dev_select(drive); msleep(50); if (ide_read_device(drive) != drive->select && present == 0) { if (drive->dn & 1) { /* exit with drive0 selected */ tp_ops->dev_select(hwif->devices[0]); /* allow ATA_BUSY to assert & clear */ msleep(50); } /* no i/f present: mmm.. this should be a 4 -ml */ return 3; } stat = tp_ops->read_status(hwif); if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || present || cmd == ATA_CMD_ID_ATAPI) { rc = ide_dev_read_id(drive, cmd, id, 0); if (rc) /* failed: try again */ rc = ide_dev_read_id(drive, cmd, id, 0); stat = tp_ops->read_status(hwif); if (stat == (ATA_BUSY | ATA_DRDY)) return 4; if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { printk(KERN_ERR "%s: no response (status = 0x%02x), " "resetting drive\n", drive->name, stat); msleep(50); tp_ops->dev_select(drive); msleep(50); tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); (void)ide_busy_sleep(drive, WAIT_WORSTCASE, 0); rc = ide_dev_read_id(drive, cmd, id, 0); } /* ensure drive IRQ is clear */ stat = tp_ops->read_status(hwif); if (rc == 1) printk(KERN_ERR "%s: no response (status = 0x%02x)\n", drive->name, stat); } else { /* not present or maybe ATAPI */ rc = 3; } if (drive->dn & 1) { /* exit with drive0 selected */ tp_ops->dev_select(hwif->devices[0]); msleep(50); /* ensure drive irq is clear */ (void)tp_ops->read_status(hwif); } return rc; } /** * 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: IDE_DFLAG_PRESENT might still be not set) */ static u8 probe_for_drive(ide_drive_t *drive) { char *m; int rc; u8 cmd; drive->dev_flags &= ~IDE_DFLAG_ID_READ; m = (char *)&drive->id[ATA_ID_PROD]; strcpy(m, "UNKNOWN"); /* skip probing? */ if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) { /* if !(success||timed-out) */ cmd = ATA_CMD_ID_ATA; rc = do_probe(drive, cmd); if (rc >= 2) { /* look for ATAPI device */ cmd = ATA_CMD_ID_ATAPI; rc = do_probe(drive, cmd); } if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) return 0; /* identification failed? */ if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 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->dev_flags &= ~IDE_DFLAG_PRESENT; } } else { if (cmd == ATA_CMD_ID_ATAPI) ide_classify_atapi_dev(drive); else ide_classify_ata_dev(drive); } } if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) return 0; /* The drive wasn't being helpful. Add generic info only */ if ((drive->dev_flags & IDE_DFLAG_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 1; } static void hwif_release_dev(struct device *dev) { ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); complete(&hwif->gendev_rel_comp); } static int ide_register_port(ide_hwif_t *hwif) { int ret; /* register with global device tree */ dev_set_name(&hwif->gendev, "%s", hwif->name); dev_set_drvdata(&hwif->gendev, hwif); if (hwif->gendev.parent == NULL) hwif->gendev.parent = hwif->dev; hwif->gendev.release = hwif_release_dev; ret = device_register(&hwif->gendev); if (ret < 0) { printk(KERN_WARNING "IDE: %s: device_register error: %d\n", __func__, ret); goto out; } hwif->portdev = device_create(ide_port_class, &hwif->gendev, MKDEV(0, 0), hwif, "%s", hwif->name); if (IS_ERR(hwif->portdev)) { ret = PTR_ERR(hwif->portdev); device_unregister(&hwif->gendev); } out: return ret; } /** * ide_port_wait_ready - wait for port to become ready * @hwif: IDE port * * 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-non-busy should not harm any existing * configuration and fix some issues like the above. * * BenH. * * Returns 0 on success, error code (< 0) otherwise. */ static int ide_port_wait_ready(ide_hwif_t *hwif) { const struct ide_tp_ops *tp_ops = hwif->tp_ops; ide_drive_t *drive; int i, 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 */ ide_port_for_each_dev(i, drive, hwif) { /* Ignore disks that we will not probe for later. */ if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 || (drive->dev_flags & IDE_DFLAG_PRESENT)) { tp_ops->dev_select(drive); tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); mdelay(2); rc = ide_wait_not_busy(hwif, 35000); if (rc) goto out; } else printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", drive->name); } out: /* Exit function with master reselected (let's be sane) */ if (i) tp_ops->dev_select(hwif->devices[0]); return rc; } /** * ide_undecoded_slave - look for bad CF adapters * @dev1: slave device * * 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_drive_t *dev1) { ide_drive_t *dev0 = dev1->hwif->devices[0]; if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0) return; /* If the models don't match they are not the same product */ if (strcmp((char *)&dev0->id[ATA_ID_PROD], (char *)&dev1->id[ATA_ID_PROD])) return; /* Serial numbers do not match */ if (strncmp((char *)&dev0->id[ATA_ID_SERNO], (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) return; /* No serial number, thankfully very rare for CF */ if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) return; /* Appears to be an IDE flash adapter with decode bugs */ printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); dev1->dev_flags &= ~IDE_DFLAG_PRESENT; } EXPORT_SYMBOL_GPL(ide_undecoded_slave); static int ide_probe_port(ide_hwif_t *hwif) { ide_drive_t *drive; unsigned int irqd; int i, rc = -ENODEV; BUG_ON(hwif->present); if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) && (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE)) return -EACCES; /* * 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); if (ide_port_wait_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. */ ide_port_for_each_dev(i, drive, hwif) { (void) probe_for_drive(drive); if (drive->dev_flags & IDE_DFLAG_PRESENT) rc = 0; } /* * Use cached IRQ number. It might be (and is...) changed by probe * code above */ if (irqd) enable_irq(irqd); return rc; } static void ide_port_tune_devices(ide_hwif_t *hwif) { const struct ide_port_ops *port_ops = hwif->port_ops; ide_drive_t *drive; int i; ide_port_for_each_present_dev(i, drive, hwif) { ide_check_nien_quirk_list(drive); if (port_ops && port_ops->quirkproc) port_ops->quirkproc(drive); } ide_port_for_each_present_dev(i, drive, hwif) { ide_set_max_pio(drive); drive->dev_flags |= IDE_DFLAG_NICE1; if (hwif->dma_ops) ide_set_dma(drive); } } /* * init request queue */ static int ide_init_queue(ide_drive_t *drive) { struct request_queue *q; ide_hwif_t *hwif = drive->hwif; 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, NULL, hwif_to_node(hwif)); if (!q) return 1; q->queuedata = drive; blk_queue_segment_boundary(q, 0xffff); if (hwif->rqsize < max_sectors) max_sectors = hwif->rqsize; blk_queue_max_hw_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_segments(q, max_sg_entries); /* assign drive queue */ drive->queue = q; /* needs drive->queue to be set */ ide_toggle_bounce(drive, 1); return 0; } static DEFINE_MUTEX(ide_cfg_mtx); /* * For any present drive: * - allocate the block device queue */ static int ide_port_setup_devices(ide_hwif_t *hwif) { ide_drive_t *drive; int i, j = 0; mutex_lock(&ide_cfg_mtx); ide_port_for_each_present_dev(i, drive, hwif) { if (ide_init_queue(drive)) { printk(KERN_ERR "ide: failed to init %s\n", drive->name); drive->dev_flags &= ~IDE_DFLAG_PRESENT; continue; } j++; } mutex_unlock(&ide_cfg_mtx); return j; } static void ide_host_enable_irqs(struct ide_host *host) { ide_hwif_t *hwif; int i; ide_host_for_each_port(i, hwif, host) { if (hwif == NULL) continue; /* clear any pending IRQs */ hwif->tp_ops->read_status(hwif); /* unmask IRQs */ if (hwif->io_ports.ctl_addr) hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); } } /* * This routine sets up the IRQ for an IDE interface. */ static int init_irq (ide_hwif_t *hwif) { struct ide_io_ports *io_ports = &hwif->io_ports; struct ide_host *host = hwif->host; irq_handler_t irq_handler = host->irq_handler; int sa = host->irq_flags; if (irq_handler == NULL) irq_handler = ide_intr; if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif)) goto out_up; #if !defined(__mc68000__) printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, io_ports->data_addr, io_ports->status_addr, io_ports->ctl_addr, hwif->irq); #else printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, io_ports->data_addr, hwif->irq); #endif /* __mc68000__ */ if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE) printk(KERN_CONT " (serialized)"); printk(KERN_CONT "\n"); return 0; out_up: 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->devices[unit]; if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) return NULL; if (drive->media == ide_disk) request_module("ide-disk"); 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 &disk_to_dev(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->dn & 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 drive_release_dev (struct device *dev) { ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); ide_proc_unregister_device(drive); blk_cleanup_queue(drive->queue); drive->queue = NULL; drive->dev_flags &= ~IDE_DFLAG_PRESENT; complete(&drive->gendev_rel_comp); } static int hwif_init(ide_hwif_t *hwif) { if (!hwif->irq) { printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); return 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; } sg_init_table(hwif->sg_table, hwif->sg_max_nents); if (init_irq(hwif)) { printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", hwif->name, hwif->irq); goto out; } blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, THIS_MODULE, ata_probe, ata_lock, hwif); return 1; out: unregister_blkdev(hwif->major, hwif->name); return 0; } static void hwif_register_devices(ide_hwif_t *hwif) { ide_drive_t *drive; unsigned int i; ide_port_for_each_present_dev(i, drive, hwif) { struct device *dev = &drive->gendev; int ret; dev_set_name(dev, "%u.%u", hwif->index, i); dev_set_drvdata(dev, drive); dev->parent = &hwif->gendev; dev->bus = &ide_bus_type; dev->release = drive_release_dev; ret = device_register(dev); if (ret < 0) printk(KERN_WARNING "IDE: %s: device_register error: " "%d\n", __func__, ret); } } static void ide_port_init_devices(ide_hwif_t *hwif) { const struct ide_port_ops *port_ops = hwif->port_ops; ide_drive_t *drive; int i; ide_port_for_each_dev(i, drive, hwif) { drive->dn = i + hwif->channel * 2; if (hwif->host_flags & IDE_HFLAG_IO_32BIT) drive->io_32bit = 1; if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) drive->dev_flags |= IDE_DFLAG_UNMASK; if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) drive->dev_flags |= IDE_DFLAG_NO_UNMASK; drive->pio_mode = XFER_PIO_0; if (port_ops && port_ops->init_dev) port_ops->init_dev(drive); } } static void ide_init_port(ide_hwif_t *hwif, unsigned int port, const struct ide_port_info *d) { hwif->channel = port; hwif->chipset = d->chipset ? d->chipset : ide_pci; if (d->init_iops) d->init_iops(hwif); /* ->host_flags may be set by ->init_iops (or even earlier...) */ hwif->host_flags |= d->host_flags; hwif->pio_mask = d->pio_mask; if (d->tp_ops) hwif->tp_ops = d->tp_ops; /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ if ((hwif->host_flags & IDE_HFLAG_DTC2278) == 0 || hwif->channel == 0) hwif->port_ops = d->port_ops; hwif->swdma_mask = d->swdma_mask; hwif->mwdma_mask = d->mwdma_mask; hwif->ultra_mask = d->udma_mask; if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { int rc; hwif->dma_ops = d->dma_ops; if (d->init_dma) rc = d->init_dma(hwif, d); else rc = ide_hwif_setup_dma(hwif, d); if (rc < 0) { printk(KERN_INFO "%s: DMA disabled\n", hwif->name); hwif->dma_ops = NULL; hwif->dma_base = 0; hwif->swdma_mask = 0; hwif->mwdma_mask = 0; hwif->ultra_mask = 0; } } if ((d->host_flags & IDE_HFLAG_SERIALIZE) || ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) hwif->host->host_flags |= IDE_HFLAG_SERIALIZE; if (d->max_sectors) hwif->rqsize = d->max_sectors; else { if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) hwif->rqsize = 256; else hwif->rqsize = 65536; } /* call chipset specific routine for each enabled port */ if (d->init_hwif) d->init_hwif(hwif); } static void ide_port_cable_detect(ide_hwif_t *hwif) { const struct ide_port_ops *port_ops = hwif->port_ops; if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { if (hwif->cbl != ATA_CBL_PATA40_SHORT) hwif->cbl = port_ops->cable_detect(hwif); } } static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR, IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR }; static void ide_port_init_devices_data(ide_hwif_t *hwif) { ide_drive_t *drive; int i; ide_port_for_each_dev(i, drive, hwif) { u8 j = (hwif->index * MAX_DRIVES) + i; u16 *saved_id = drive->id; memset(drive, 0, sizeof(*drive)); memset(saved_id, 0, SECTOR_SIZE); drive->id = saved_id; drive->media = ide_disk; drive->select = (i << 4) | ATA_DEVICE_OBS; drive->hwif = hwif; drive->ready_stat = ATA_DRDY; drive->bad_wstat = BAD_W_STAT; drive->special_flags = IDE_SFLAG_RECALIBRATE | IDE_SFLAG_SET_GEOMETRY; drive->name[0] = 'h'; drive->name[1] = 'd'; drive->name[2] = 'a' + j; drive->max_failures = IDE_DEFAULT_MAX_FAILURES; INIT_LIST_HEAD(&drive->list); init_completion(&drive->gendev_rel_comp); } } static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) { /* fill in any non-zero initial values */ hwif->index = index; hwif->major = ide_hwif_to_major[index]; hwif->name[0] = 'i'; hwif->name[1] = 'd'; hwif->name[2] = 'e'; hwif->name[3] = '0' + index; spin_lock_init(&hwif->lock); init_timer(&hwif->timer); hwif->timer.function = &ide_timer_expiry; hwif->timer.data = (unsigned long)hwif; init_completion(&hwif->gendev_rel_comp); hwif->tp_ops = &default_tp_ops; ide_port_init_devices_data(hwif); } static void ide_init_port_hw(ide_hwif_t *hwif, struct ide_hw *hw) { memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); hwif->irq = hw->irq; hwif->dev = hw->dev; hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; hwif->config_data = hw->config; } static unsigned int ide_indexes; /** * ide_find_port_slot - find free port slot * @d: IDE port info * * Return the new port slot index or -ENOENT if we are out of free slots. */ static int ide_find_port_slot(const struct ide_port_info *d) { int idx = -ENOENT; u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0; /* * Claim an unassigned slot. * * Give preference to claiming other slots before claiming ide0/ide1, * just in case there's another interface yet-to-be-scanned * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). * * Unless there is a bootable card that does not use the standard * ports 0x1f0/0x170 (the ide0/ide1 defaults). */ mutex_lock(&ide_cfg_mtx); if (bootable) { if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) idx = ffz(ide_indexes | i); } else { if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) idx = ffz(ide_indexes | 3); else if ((ide_indexes & 3) != 3) idx = ffz(ide_indexes); } if (idx >= 0) ide_indexes |= (1 << idx); mutex_unlock(&ide_cfg_mtx); return idx; } static void ide_free_port_slot(int idx) { mutex_lock(&ide_cfg_mtx); ide_indexes &= ~(1 << idx); mutex_unlock(&ide_cfg_mtx); } static void ide_port_free_devices(ide_hwif_t *hwif) { ide_drive_t *drive; int i; ide_port_for_each_dev(i, drive, hwif) { kfree(drive->id); kfree(drive); } } static int ide_port_alloc_devices(ide_hwif_t *hwif, int node) { int i; for (i = 0; i < MAX_DRIVES; i++) { ide_drive_t *drive; drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node); if (drive == NULL) goto out_nomem; /* * 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_node(SECTOR_SIZE, GFP_KERNEL, node); if (drive->id == NULL) goto out_nomem; hwif->devices[i] = drive; } return 0; out_nomem: ide_port_free_devices(hwif); return -ENOMEM; } struct ide_host *ide_host_alloc(const struct ide_port_info *d, struct ide_hw **hws, unsigned int n_ports) { struct ide_host *host; struct device *dev = hws[0] ? hws[0]->dev : NULL; int node = dev ? dev_to_node(dev) : -1; int i; host = kzalloc_node(sizeof(*host), GFP_KERNEL, node); if (host == NULL) return NULL; for (i = 0; i < n_ports; i++) { ide_hwif_t *hwif; int idx; if (hws[i] == NULL) continue; hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node); if (hwif == NULL) continue; if (ide_port_alloc_devices(hwif, node) < 0) { kfree(hwif); continue; } idx = ide_find_port_slot(d); if (idx < 0) { printk(KERN_ERR "%s: no free slot for interface\n", d ? d->name : "ide"); ide_port_free_devices(hwif); kfree(hwif); continue; } ide_init_port_data(hwif, idx); hwif->host = host; host->ports[i] = hwif; host->n_ports++; } if (host->n_ports == 0) { kfree(host); return NULL; } host->dev[0] = dev; if (d) { host->init_chipset = d->init_chipset; host->get_lock = d->get_lock; host->release_lock = d->release_lock; host->host_flags = d->host_flags; host->irq_flags = d->irq_flags; } return host; } EXPORT_SYMBOL_GPL(ide_host_alloc); static void ide_port_free(ide_hwif_t *hwif) { ide_port_free_devices(hwif); ide_free_port_slot(hwif->index); kfree(hwif); } static void ide_disable_port(ide_hwif_t *hwif) { struct ide_host *host = hwif->host; int i; printk(KERN_INFO "%s: disabling port\n", hwif->name); for (i = 0; i < MAX_HOST_PORTS; i++) { if (host->ports[i] == hwif) { host->ports[i] = NULL; host->n_ports--; } } ide_port_free(hwif); } int ide_host_register(struct ide_host *host, const struct ide_port_info *d, struct ide_hw **hws) { ide_hwif_t *hwif, *mate = NULL; int i, j = 0; ide_host_for_each_port(i, hwif, host) { if (hwif == NULL) { mate = NULL; continue; } ide_init_port_hw(hwif, hws[i]); ide_port_apply_params(hwif); if ((i & 1) && mate) { hwif->mate = mate; mate->mate = hwif; } mate = (i & 1) ? NULL : hwif; ide_init_port(hwif, i & 1, d); ide_port_cable_detect(hwif); hwif->port_flags |= IDE_PFLAG_PROBING; ide_port_init_devices(hwif); } ide_host_for_each_port(i, hwif, host) { if (hwif == NULL) continue; if (ide_probe_port(hwif) == 0) hwif->present = 1; hwif->port_flags &= ~IDE_PFLAG_PROBING; if ((hwif->host_flags & IDE_HFLAG_4DRIVES) == 0 || hwif->mate == NULL || hwif->mate->present == 0) { if (ide_register_port(hwif)) { ide_disable_port(hwif); continue; } } if (hwif->present) ide_port_tune_devices(hwif); } ide_host_enable_irqs(host); ide_host_for_each_port(i, hwif, host) { if (hwif == NULL) continue; if (hwif_init(hwif) == 0) { printk(KERN_INFO "%s: failed to initialize IDE " "interface\n", hwif->name); device_unregister(&hwif->gendev); ide_disable_port(hwif); continue; } if (hwif->present) if (ide_port_setup_devices(hwif) == 0) { hwif->present = 0; continue; } j++; ide_acpi_init_port(hwif); if (hwif->present) ide_acpi_port_init_devices(hwif); } ide_host_for_each_port(i, hwif, host) { if (hwif == NULL) continue; ide_sysfs_register_port(hwif); ide_proc_register_port(hwif); if (hwif->present) { ide_proc_port_register_devices(hwif); hwif_register_devices(hwif); } } return j ? 0 : -1; } EXPORT_SYMBOL_GPL(ide_host_register); int ide_host_add(const struct ide_port_info *d, struct ide_hw **hws, unsigned int n_ports, struct ide_host **hostp) { struct ide_host *host; int rc; host = ide_host_alloc(d, hws, n_ports); if (host == NULL) return -ENOMEM; rc = ide_host_register(host, d, hws); if (rc) { ide_host_free(host); return rc; } if (hostp) *hostp = host; return 0; } EXPORT_SYMBOL_GPL(ide_host_add); static void __ide_port_unregister_devices(ide_hwif_t *hwif) { ide_drive_t *drive; int i; ide_port_for_each_present_dev(i, drive, hwif) { device_unregister(&drive->gendev); wait_for_completion(&drive->gendev_rel_comp); } } void ide_port_unregister_devices(ide_hwif_t *hwif) { mutex_lock(&ide_cfg_mtx); __ide_port_unregister_devices(hwif); hwif->present = 0; ide_port_init_devices_data(hwif); mutex_unlock(&ide_cfg_mtx); } EXPORT_SYMBOL_GPL(ide_port_unregister_devices); /** * ide_unregister - free an IDE interface * @hwif: IDE interface * * Perform the final unregister of an IDE interface. * * Locking: * The caller must not hold the IDE locks. * * It is up to the caller to be sure there is no pending I/O here, * and that the interface will not be reopened (present/vanishing * locking isn't yet done BTW). */ static void ide_unregister(ide_hwif_t *hwif) { BUG_ON(in_interrupt()); BUG_ON(irqs_disabled()); mutex_lock(&ide_cfg_mtx); if (hwif->present) { __ide_port_unregister_devices(hwif); hwif->present = 0; } ide_proc_unregister_port(hwif); free_irq(hwif->irq, hwif); device_unregister(hwif->portdev); device_unregister(&hwif->gendev); wait_for_completion(&hwif->gendev_rel_comp); /* * Remove us from the kernel's knowledge */ blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); kfree(hwif->sg_table); unregister_blkdev(hwif->major, hwif->name); ide_release_dma_engine(hwif); mutex_unlock(&ide_cfg_mtx); } void ide_host_free(struct ide_host *host) { ide_hwif_t *hwif; int i; ide_host_for_each_port(i, hwif, host) { if (hwif) ide_port_free(hwif); } kfree(host); } EXPORT_SYMBOL_GPL(ide_host_free); void ide_host_remove(struct ide_host *host) { ide_hwif_t *hwif; int i; ide_host_for_each_port(i, hwif, host) { if (hwif) ide_unregister(hwif); } ide_host_free(host); } EXPORT_SYMBOL_GPL(ide_host_remove); void ide_port_scan(ide_hwif_t *hwif) { int rc; ide_port_apply_params(hwif); ide_port_cable_detect(hwif); hwif->port_flags |= IDE_PFLAG_PROBING; ide_port_init_devices(hwif); rc = ide_probe_port(hwif); hwif->port_flags &= ~IDE_PFLAG_PROBING; if (rc < 0) return; hwif->present = 1; ide_port_tune_devices(hwif); ide_port_setup_devices(hwif); ide_acpi_port_init_devices(hwif); hwif_register_devices(hwif); ide_proc_port_register_devices(hwif); } EXPORT_SYMBOL_GPL(ide_port_scan);


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