#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.
*/
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
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*);
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)
{
#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 },
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) {
return ((uint64_t)si.totalram << PAGE_SHIFT);
}
-/*
- * 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
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;
projects / mv-sheeva.git / blobdiff