[SCSI] aic7xxx: remove ahc_tailq

now that we do normal PCI probing there's no need to keep a list of
all HBAs.

Rejections fixed up and
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

7 files changed, 6 insertions, 261 deletions

diff --git a/drivers/scsi/aic7xxx/aic7770.c b/drivers/scsi/aic7xxx/aic7770.c
index 92703bb35982..00f3bd1e181e 100644
--- a/drivers/scsi/aic7xxx/aic7770.c
+++ b/drivers/scsi/aic7xxx/aic7770.c
@@ -254,19 +254,12 @@ aic7770_config(struct ahc_softc *ahc, struct aic7770_identity *entry, u_int io)
         if (error != 0)
                 return (error);
 
-        ahc_list_lock(&l);
-        /*
-         * Link this softc in with all other ahc instances.
-         */
-        ahc_softc_insert(ahc);
+        ahc->init_level++;
 
         /*
          * Enable the board's BUS drivers
          */
         ahc_outb(ahc, BCTL, ENABLE);
-
-        ahc_list_unlock(&l);
-
         return (0);
 }
 
diff --git a/drivers/scsi/aic7xxx/aic7xxx.h b/drivers/scsi/aic7xxx/aic7xxx.h
index 0948d50ae75c..088cbc23743d 100644
--- a/drivers/scsi/aic7xxx/aic7xxx.h
+++ b/drivers/scsi/aic7xxx/aic7xxx.h
@@ -1023,9 +1023,6 @@ struct ahc_softc {
         struct cs                *critical_sections;
         u_int                     num_critical_sections;
 
-        /* Links for chaining softcs */
-        TAILQ_ENTRY(ahc_softc)    links;
-
         /* Channel Names ('A', 'B', etc.) */
         char                      channel;
         char                      channel_b;
@@ -1110,9 +1107,6 @@ struct ahc_softc {
         uint16_t                  user_tagenable;/* Tagged Queuing allowed */
 };
 
-TAILQ_HEAD(ahc_softc_tailq, ahc_softc);
-extern struct ahc_softc_tailq ahc_tailq;
-
 /************************ Active Device Information ***************************/
 typedef enum {
         ROLE_UNKNOWN,
@@ -1198,7 +1192,6 @@ void			 ahc_intr_enable(struct ahc_softc *ahc, int enable);
 void                     ahc_pause_and_flushwork(struct ahc_softc *ahc);
 int                      ahc_suspend(struct ahc_softc *ahc); 
 int                      ahc_resume(struct ahc_softc *ahc);
-void                     ahc_softc_insert(struct ahc_softc *);
 void                     ahc_set_unit(struct ahc_softc *, int);
 void                     ahc_set_name(struct ahc_softc *, char *);
 void                     ahc_alloc_scbs(struct ahc_softc *ahc);
diff --git a/drivers/scsi/aic7xxx/aic7xxx_core.c b/drivers/scsi/aic7xxx/aic7xxx_core.c
index 8a2bb6f8d77b..7bc01e41bcce 100644
--- a/drivers/scsi/aic7xxx/aic7xxx_core.c
+++ b/drivers/scsi/aic7xxx/aic7xxx_core.c
@@ -52,9 +52,6 @@
 #include <dev/aic7xxx/aicasm/aicasm_insformat.h>
 #endif
 
-/****************************** Softc Data ************************************/
-struct ahc_softc_tailq ahc_tailq = TAILQ_HEAD_INITIALIZER(ahc_tailq);
-
 /***************************** Lookup Tables **********************************/
 char *ahc_chip_names[] =
 {
@@ -3879,62 +3876,6 @@ ahc_softc_init(struct ahc_softc *ahc)
 }
 
 void
-ahc_softc_insert(struct ahc_softc *ahc)
-{
-        struct ahc_softc *list_ahc;
-
-#if AHC_PCI_CONFIG > 0
-        /*
-         * Second Function PCI devices need to inherit some
-         * settings from function 0.
-         */
-        if ((ahc->chip & AHC_BUS_MASK) == AHC_PCI
-         && (ahc->features & AHC_MULTI_FUNC) != 0) {
-                TAILQ_FOREACH(list_ahc, &ahc_tailq, links) {
-                        ahc_dev_softc_t list_pci;
-                        ahc_dev_softc_t pci;
-
-                        list_pci = list_ahc->dev_softc;
-                        pci = ahc->dev_softc;
-                        if (ahc_get_pci_slot(list_pci) == ahc_get_pci_slot(pci)
-                         && ahc_get_pci_bus(list_pci) == ahc_get_pci_bus(pci)) {
-                                struct ahc_softc *master;
-                                struct ahc_softc *slave;
-
-                                if (ahc_get_pci_function(list_pci) == 0) {
-                                        master = list_ahc;
-                                        slave = ahc;
-                                } else {
-                                        master = ahc;
-                                        slave = list_ahc;
-                                }
-                                slave->flags &= ~AHC_BIOS_ENABLED; 
-                                slave->flags |=
-                                    master->flags & AHC_BIOS_ENABLED;
-                                slave->flags &= ~AHC_PRIMARY_CHANNEL; 
-                                slave->flags |=
-                                    master->flags & AHC_PRIMARY_CHANNEL;
-                                break;
-                        }
-                }
-        }
-#endif
-
-        /*
-         * Insertion sort into our list of softcs.
-         */
-        list_ahc = TAILQ_FIRST(&ahc_tailq);
-        while (list_ahc != NULL
-            && ahc_softc_comp(ahc, list_ahc) <= 0)
-                list_ahc = TAILQ_NEXT(list_ahc, links);
-        if (list_ahc != NULL)
-                TAILQ_INSERT_BEFORE(list_ahc, ahc, links);
-        else
-                TAILQ_INSERT_TAIL(&ahc_tailq, ahc, links);
-        ahc->init_level++;
-}
-
-void
 ahc_set_unit(struct ahc_softc *ahc, int unit)
 {
         ahc->unit = unit;
diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c
index f94a67be0be4..116d0f51ca2c 100644
--- a/drivers/scsi/aic7xxx/aic7xxx_osm.c
+++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c
@@ -136,10 +136,6 @@ static struct scsi_transport_template *ahc_linux_transport_template = NULL;
 #include <linux/blkdev.h>               /* For block_size() */
 #include <linux/delay.h>        /* For ssleep/msleep */
 
-/*
- * Lock protecting manipulation of the ahc softc list.
- */
-spinlock_t ahc_list_spinlock;
 
 /*
  * Set this to the delay in seconds after SCSI bus reset.
@@ -292,25 +288,6 @@ ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
 static uint32_t aic7xxx_no_reset;
 
 /*
- * Certain PCI motherboards will scan PCI devices from highest to lowest,
- * others scan from lowest to highest, and they tend to do all kinds of
- * strange things when they come into contact with PCI bridge chips.  The
- * net result of all this is that the PCI card that is actually used to boot
- * the machine is very hard to detect.  Most motherboards go from lowest
- * PCI slot number to highest, and the first SCSI controller found is the
- * one you boot from.  The only exceptions to this are when a controller
- * has its BIOS disabled.  So, we by default sort all of our SCSI controllers
- * from lowest PCI slot number to highest PCI slot number.  We also force
- * all controllers with their BIOS disabled to the end of the list.  This
- * works on *almost* all computers.  Where it doesn't work, we have this
- * option.  Setting this option to non-0 will reverse the order of the sort
- * to highest first, then lowest, but will still leave cards with their BIOS
- * disabled at the very end.  That should fix everyone up unless there are
- * really strange cirumstances.
- */
-static uint32_t aic7xxx_reverse_scan;
-
-/*
  * Should we force EXTENDED translation on a controller.
  *     0 == Use whatever is in the SEEPROM or default to off
  *     1 == Use whatever is in the SEEPROM or default to on
@@ -416,7 +393,9 @@ static int ahc_linux_run_command(struct ahc_softc*,
 static void ahc_linux_setup_tag_info_global(char *p);
 static aic_option_callback_t ahc_linux_setup_tag_info;
 static int  aic7xxx_setup(char *s);
-static int  ahc_linux_next_unit(void);
+
+static int ahc_linux_unit;
+
 
 /********************************* Inlines ************************************/
 static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
@@ -911,99 +890,6 @@ ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
         return (0);
 }
 
-/********************* Platform Dependent Functions ***************************/
-/*
- * Compare "left hand" softc with "right hand" softc, returning:
- * < 0 - lahc has a lower priority than rahc
- *   0 - Softcs are equal
- * > 0 - lahc has a higher priority than rahc
- */
-int
-ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc)
-{
-        int     value;
-        int     rvalue;
-        int     lvalue;
-
-        /*
-         * Under Linux, cards are ordered as follows:
-         *      1) VLB/EISA BIOS enabled devices sorted by BIOS address.
-         *      2) PCI devices with BIOS enabled sorted by bus/slot/func.
-         *      3) All remaining VLB/EISA devices sorted by ioport.
-         *      4) All remaining PCI devices sorted by bus/slot/func.
-         */
-        value = (lahc->flags & AHC_BIOS_ENABLED)
-              - (rahc->flags & AHC_BIOS_ENABLED);
-        if (value != 0)
-                /* Controllers with BIOS enabled have a *higher* priority */
-                return (value);
-
-        /*
-         * Same BIOS setting, now sort based on bus type.
-         * EISA and VL controllers sort together.  EISA/VL
-         * have higher priority than PCI.
-         */
-        rvalue = (rahc->chip & AHC_BUS_MASK);
-        if (rvalue == AHC_VL)
-                rvalue = AHC_EISA;
-        lvalue = (lahc->chip & AHC_BUS_MASK);
-        if (lvalue == AHC_VL)
-                lvalue = AHC_EISA;
-        value = rvalue - lvalue;
-        if (value != 0)
-                return (value);
-
-        /* Still equal.  Sort by BIOS address, ioport, or bus/slot/func. */
-        switch (rvalue) {
-#ifdef CONFIG_PCI
-        case AHC_PCI:
-        {
-                char primary_channel;
-
-                if (aic7xxx_reverse_scan != 0)
-                        value = ahc_get_pci_bus(lahc->dev_softc)
-                              - ahc_get_pci_bus(rahc->dev_softc);
-                else
-                        value = ahc_get_pci_bus(rahc->dev_softc)
-                              - ahc_get_pci_bus(lahc->dev_softc);
-                if (value != 0)
-                        break;
-                if (aic7xxx_reverse_scan != 0)
-                        value = ahc_get_pci_slot(lahc->dev_softc)
-                              - ahc_get_pci_slot(rahc->dev_softc);
-                else
-                        value = ahc_get_pci_slot(rahc->dev_softc)
-                              - ahc_get_pci_slot(lahc->dev_softc);
-                if (value != 0)
-                        break;
-                /*
-                 * On multi-function devices, the user can choose
-                 * to have function 1 probed before function 0.
-                 * Give whichever channel is the primary channel
-                 * the highest priority.
-                 */
-                primary_channel = (lahc->flags & AHC_PRIMARY_CHANNEL) + 'A';
-                value = -1;
-                if (lahc->channel == primary_channel)
-                        value = 1;
-                break;
-        }
-#endif
-        case AHC_EISA:
-                if ((rahc->flags & AHC_BIOS_ENABLED) != 0) {
-                        value = rahc->platform_data->bios_address
-                              - lahc->platform_data->bios_address; 
-                } else {
-                        value = rahc->bsh.ioport
-                              - lahc->bsh.ioport; 
-                }
-                break;
-        default:
-                panic("ahc_softc_sort: invalid bus type");
-        }
-        return (value);
-}
-
 static void
 ahc_linux_setup_tag_info_global(char *p)
 {
@@ -1055,7 +941,6 @@ aic7xxx_setup(char *s)
 #ifdef AHC_DEBUG
                 { "debug", &ahc_debug },
 #endif
-                { "reverse_scan", &aic7xxx_reverse_scan },
                 { "periodic_otag", &aic7xxx_periodic_otag },
                 { "pci_parity", &aic7xxx_pci_parity },
                 { "seltime", &aic7xxx_seltime },
@@ -1130,7 +1015,7 @@ ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *templa
         host->max_lun = AHC_NUM_LUNS;
         host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
         host->sg_tablesize = AHC_NSEG;
-        ahc_set_unit(ahc, ahc_linux_next_unit());
+        ahc_set_unit(ahc, ahc_linux_unit++);
         sprintf(buf, "scsi%d", host->host_no);
         new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
         if (new_name != NULL) {
@@ -1159,29 +1044,6 @@ ahc_linux_get_memsize(void)
 }
 
 /*
- * Find the smallest available unit number to use
- * for a new device.  We don't just use a static
- * count to handle the "repeated hot-(un)plug"
- * scenario.
- */
-static int
-ahc_linux_next_unit(void)
-{
-        struct ahc_softc *ahc;
-        int unit;
-
-        unit = 0;
-retry:
-        TAILQ_FOREACH(ahc, &ahc_tailq, links) {
-                if (ahc->unit == unit) {
-                        unit++;
-                        goto retry;
-                }
-        }
-        return (unit);
-}
-
-/*
  * Place the SCSI bus into a known state by either resetting it,
  * or forcing transfer negotiations on the next command to any
  * target.
@@ -2685,12 +2547,6 @@ ahc_linux_init(void)
         scsi_transport_reserve_device(ahc_linux_transport_template,
                                       sizeof(struct ahc_linux_device));
 
-        /*
-         * Initialize our softc list lock prior to
-         * probing for any adapters.
-         */
-        ahc_list_lockinit();
-
         ahc_linux_pci_init();
         ahc_linux_eisa_init();
         return 0;
diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.h b/drivers/scsi/aic7xxx/aic7xxx_osm.h
index 5c0c9f9725b2..0e47ac217549 100644
--- a/drivers/scsi/aic7xxx/aic7xxx_osm.h
+++ b/drivers/scsi/aic7xxx/aic7xxx_osm.h
@@ -509,15 +509,6 @@ void	ahc_format_transinfo(struct info_str *info,
 
 /******************************** Locking *************************************/
 /* Lock protecting internal data structures */
-static __inline void ahc_lockinit(struct ahc_softc *);
-static __inline void ahc_lock(struct ahc_softc *, unsigned long *flags);
-static __inline void ahc_unlock(struct ahc_softc *, unsigned long *flags);
-
-/* Lock held during ahc_list manipulation and ahc softc frees */
-extern spinlock_t ahc_list_spinlock;
-static __inline void ahc_list_lockinit(void);
-static __inline void ahc_list_lock(unsigned long *flags);
-static __inline void ahc_list_unlock(unsigned long *flags);
 
 static __inline void
 ahc_lockinit(struct ahc_softc *ahc)
@@ -537,24 +528,6 @@ ahc_unlock(struct ahc_softc *ahc, unsigned long *flags)
         spin_unlock_irqrestore(&ahc->platform_data->spin_lock, *flags);
 }
 
-static __inline void
-ahc_list_lockinit(void)
-{
-        spin_lock_init(&ahc_list_spinlock);
-}
-
-static __inline void
-ahc_list_lock(unsigned long *flags)
-{
-        spin_lock_irqsave(&ahc_list_spinlock, *flags);
-}
-
-static __inline void
-ahc_list_unlock(unsigned long *flags)
-{
-        spin_unlock_irqrestore(&ahc_list_spinlock, *flags);
-}
-
 /******************************* PCI Definitions ******************************/
 /*
  * PCIM_xxx: mask to locate subfield in register
@@ -891,7 +864,6 @@ int	ahc_platform_abort_scbs(struct ahc_softc *ahc, int target,
 irqreturn_t
         ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs);
 void    ahc_platform_flushwork(struct ahc_softc *ahc);
-int     ahc_softc_comp(struct ahc_softc *, struct ahc_softc *);
 void    ahc_done(struct ahc_softc*, struct scb*);
 void    ahc_send_async(struct ahc_softc *, char channel,
                        u_int target, u_int lun, ac_code, void *);
diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c b/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
index 45ad438c9943..9d318ce2c993 100644
--- a/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
+++ b/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
@@ -143,10 +143,6 @@ ahc_linux_pci_dev_remove(struct pci_dev *pdev)
         struct ahc_softc *ahc = pci_get_drvdata(pdev);
         u_long s;
 
-        ahc_list_lock(&s);
-        TAILQ_REMOVE(&ahc_tailq, ahc, links);
-        ahc_list_unlock(&s);
-
         ahc_lock(ahc, &s);
         ahc_intr_enable(ahc, FALSE);
         ahc_unlock(ahc, &s);
diff --git a/drivers/scsi/aic7xxx/aic7xxx_pci.c b/drivers/scsi/aic7xxx/aic7xxx_pci.c
index 7ddcc97fb243..b3b2e2237eb3 100644
--- a/drivers/scsi/aic7xxx/aic7xxx_pci.c
+++ b/drivers/scsi/aic7xxx/aic7xxx_pci.c
@@ -704,7 +704,6 @@ ahc_find_pci_device(ahc_dev_softc_t pci)
 int
 ahc_pci_config(struct ahc_softc *ahc, struct ahc_pci_identity *entry)
 {
-        u_long   l;
         u_int    command;
         u_int    our_id;
         u_int    sxfrctl1;
@@ -964,12 +963,7 @@ ahc_pci_config(struct ahc_softc *ahc, struct ahc_pci_identity *entry)
         if (error != 0)
                 return (error);
 
-        ahc_list_lock(&l);
-        /*
-         * Link this softc in with all other ahc instances.
-         */
-        ahc_softc_insert(ahc);
-        ahc_list_unlock(&l);
+        ahc->init_level++;
         return (0);
 }