+++ /dev/null
-/*
- * ultrastor.c Copyright (C) 1992 David B. Gentzel
- * Low-level SCSI driver for UltraStor 14F, 24F, and 34F
- * by David B. Gentzel, Whitfield Software Services, Carnegie, PA
- * (gentzel@nova.enet.dec.com)
- * scatter/gather added by Scott Taylor (n217cg@tamuts.tamu.edu)
- * 24F and multiple command support by John F. Carr (jfc@athena.mit.edu)
- * John's work modified by Caleb Epstein (cae@jpmorgan.com) and
- * Eric Youngdale (ericy@cais.com).
- * Thanks to UltraStor for providing the necessary documentation
- *
- * This is an old driver, for the 14F and 34F you should be using the
- * u14-34f driver instead.
- */
-
-/*
- * TODO:
- * 1. Find out why scatter/gather is limited to 16 requests per command.
- * This is fixed, at least on the 24F, as of version 1.12 - CAE.
- * 2. Look at command linking (mscp.command_link and
- * mscp.command_link_id). (Does not work with many disks,
- * and no performance increase. ERY).
- * 3. Allow multiple adapters.
- */
-
-/*
- * NOTES:
- * The UltraStor 14F, 24F, and 34F are a family of intelligent, high
- * performance SCSI-2 host adapters. They all support command queueing
- * and scatter/gather I/O. Some of them can also emulate the standard
- * WD1003 interface for use with OS's which don't support SCSI. Here
- * is the scoop on the various models:
- * 14F - ISA first-party DMA HA with floppy support and WD1003 emulation.
- * 14N - ISA HA with floppy support. I think that this is a non-DMA
- * HA. Nothing further known.
- * 24F - EISA Bus Master HA with floppy support and WD1003 emulation.
- * 34F - VL-Bus Bus Master HA with floppy support (no WD1003 emulation).
- *
- * The 14F, 24F, and 34F are supported by this driver.
- *
- * Places flagged with a triple question-mark are things which are either
- * unfinished, questionable, or wrong.
- */
-
-/* Changes from version 1.11 alpha to 1.12
- *
- * Increased the size of the scatter-gather list to 33 entries for
- * the 24F adapter (it was 16). I don't have the specs for the 14F
- * or the 34F, so they may support larger s-g lists as well.
- *
- * Caleb Epstein <cae@jpmorgan.com>
- */
-
-/* Changes from version 1.9 to 1.11
- *
- * Patches to bring this driver up to speed with the default kernel
- * driver which supports only the 14F and 34F adapters. This version
- * should compile cleanly into 0.99.13, 0.99.12 and probably 0.99.11.
- *
- * Fixes from Eric Youngdale to fix a few possible race conditions and
- * several problems with bit testing operations (insufficient
- * parentheses).
- *
- * Removed the ultrastor_abort() and ultrastor_reset() functions
- * (enclosed them in #if 0 / #endif). These functions, at least on
- * the 24F, cause the SCSI bus to do odd things and generally lead to
- * kernel panics and machine hangs. This is like the Adaptec code.
- *
- * Use check/snarf_region for 14f, 34f to avoid I/O space address conflicts.
- */
-
-/* Changes from version 1.8 to version 1.9
- *
- * 0.99.11 patches (cae@jpmorgan.com) */
-
-/* Changes from version 1.7 to version 1.8
- *
- * Better error reporting.
- */
-
-/* Changes from version 1.6 to version 1.7
- *
- * Removed CSIR command code.
- *
- * Better race condition avoidance (xchgb function added).
- *
- * Set ICM and OGM status to zero at probe (24F)
- *
- * reset sends soft reset to UltraStor adapter
- *
- * reset adapter if adapter interrupts with an invalid MSCP address
- *
- * handle aborted command interrupt (24F)
- *
- */
-
-/* Changes from version 1.5 to version 1.6:
- *
- * Read MSCP address from ICM _before_ clearing the interrupt flag.
- * This fixes a race condition.
- */
-
-/* Changes from version 1.4 to version 1.5:
- *
- * Abort now calls done when multiple commands are enabled.
- *
- * Clear busy when aborted command finishes, not when abort is called.
- *
- * More debugging messages for aborts.
- */
-
-/* Changes from version 1.3 to version 1.4:
- *
- * Enable automatic request of sense data on error (requires newer version
- * of scsi.c to be useful).
- *
- * Fix PORT_OVERRIDE for 14F.
- *
- * Fix abort and reset to work properly (config.aborted wasn't cleared
- * after it was tested, so after a command abort no further commands would
- * work).
- *
- * Boot time test to enable SCSI bus reset (defaults to not allowing reset).
- *
- * Fix test for OGM busy -- the busy bit is in different places on the 24F.
- *
- * Release ICM slot by clearing first byte on 24F.
- */
-
-#include <linux/module.h>
-#include <linux/blkdev.h>
-#include <linux/interrupt.h>
-#include <linux/stddef.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/ioport.h>
-#include <linux/proc_fs.h>
-#include <linux/spinlock.h>
-#include <linux/stat.h>
-#include <linux/bitops.h>
-#include <linux/delay.h>
-
-#include <asm/io.h>
-#include <asm/dma.h>
-
-#define ULTRASTOR_PRIVATE /* Get the private stuff from ultrastor.h */
-#include "scsi.h"
-#include <scsi/scsi_host.h>
-#include "ultrastor.h"
-
-#define FALSE 0
-#define TRUE 1
-
-#ifndef ULTRASTOR_DEBUG
-#define ULTRASTOR_DEBUG (UD_ABORT|UD_CSIR|UD_RESET)
-#endif
-
-#define VERSION "1.12"
-
-#define PACKED __attribute__((packed))
-#define ALIGNED(x) __attribute__((aligned(x)))
-
-
-/* The 14F uses an array of 4-byte ints for its scatter/gather list.
- The data can be unaligned, but need not be. It's easier to give
- the list normal alignment since it doesn't need to fit into a
- packed structure. */
-
-typedef struct {
- u32 address;
- u32 num_bytes;
-} ultrastor_sg_list;
-
-
-/* MailBox SCSI Command Packet. Basic command structure for communicating
- with controller. */
-struct mscp {
- unsigned char opcode: 3; /* type of command */
- unsigned char xdir: 2; /* data transfer direction */
- unsigned char dcn: 1; /* disable disconnect */
- unsigned char ca: 1; /* use cache (if available) */
- unsigned char sg: 1; /* scatter/gather operation */
- unsigned char target_id: 3; /* target SCSI id */
- unsigned char ch_no: 2; /* SCSI channel (always 0 for 14f) */
- unsigned char lun: 3; /* logical unit number */
- unsigned int transfer_data PACKED; /* transfer data pointer */
- unsigned int transfer_data_length PACKED; /* length in bytes */
- unsigned int command_link PACKED; /* for linking command chains */
- unsigned char scsi_command_link_id; /* identifies command in chain */
- unsigned char number_of_sg_list; /* (if sg is set) 8 bytes per list */
- unsigned char length_of_sense_byte;
- unsigned char length_of_scsi_cdbs; /* 6, 10, or 12 */
- unsigned char scsi_cdbs[12]; /* SCSI commands */
- unsigned char adapter_status; /* non-zero indicates HA error */
- unsigned char target_status; /* non-zero indicates target error */
- u32 sense_data PACKED;
- /* The following fields are for software only. They are included in
- the MSCP structure because they are associated with SCSI requests. */
- void (*done) (struct scsi_cmnd *);
- struct scsi_cmnd *SCint;
- ultrastor_sg_list sglist[ULTRASTOR_24F_MAX_SG]; /* use larger size for 24F */
-};
-
-
-/* Port addresses (relative to the base address) */
-#define U14F_PRODUCT_ID(port) ((port) + 0x4)
-#define CONFIG(port) ((port) + 0x6)
-
-/* Port addresses relative to the doorbell base address. */
-#define LCL_DOORBELL_MASK(port) ((port) + 0x0)
-#define LCL_DOORBELL_INTR(port) ((port) + 0x1)
-#define SYS_DOORBELL_MASK(port) ((port) + 0x2)
-#define SYS_DOORBELL_INTR(port) ((port) + 0x3)
-
-
-/* Used to store configuration info read from config i/o registers. Most of
- this is not used yet, but might as well save it.
-
- This structure also holds port addresses that are not at the same offset
- on the 14F and 24F.
-
- This structure holds all data that must be duplicated to support multiple
- adapters. */
-
-static struct ultrastor_config
-{
- unsigned short port_address; /* base address of card */
- unsigned short doorbell_address; /* base address of doorbell CSRs */
- unsigned short ogm_address; /* base address of OGM */
- unsigned short icm_address; /* base address of ICM */
- const void *bios_segment;
- unsigned char interrupt: 4;
- unsigned char dma_channel: 3;
- unsigned char bios_drive_number: 1;
- unsigned char heads;
- unsigned char sectors;
- unsigned char ha_scsi_id: 3;
- unsigned char subversion: 4;
- unsigned char revision;
- /* The slot number is used to distinguish the 24F (slot != 0) from
- the 14F and 34F (slot == 0). */
- unsigned char slot;
-
-#ifdef PRINT_U24F_VERSION
- volatile int csir_done;
-#endif
-
- /* A pool of MSCP structures for this adapter, and a bitmask of
- busy structures. (If ULTRASTOR_14F_MAX_CMDS == 1, a 1 byte
- busy flag is used instead.) */
-
-#if ULTRASTOR_MAX_CMDS == 1
- unsigned char mscp_busy;
-#else
- unsigned long mscp_free;
-#endif
- volatile unsigned char aborted[ULTRASTOR_MAX_CMDS];
- struct mscp mscp[ULTRASTOR_MAX_CMDS];
-} config = {0};
-
-/* Set this to 1 to reset the SCSI bus on error. */
-static int ultrastor_bus_reset;
-
-
-/* Allowed BIOS base addresses (NULL indicates reserved) */
-static const void *const bios_segment_table[8] = {
- NULL, (void *)0xC4000, (void *)0xC8000, (void *)0xCC000,
- (void *)0xD0000, (void *)0xD4000, (void *)0xD8000, (void *)0xDC000,
-};
-
-/* Allowed IRQs for 14f */
-static const unsigned char interrupt_table_14f[4] = { 15, 14, 11, 10 };
-
-/* Allowed DMA channels for 14f (0 indicates reserved) */
-static const unsigned char dma_channel_table_14f[4] = { 5, 6, 7, 0 };
-
-/* Head/sector mappings allowed by 14f */
-static const struct {
- unsigned char heads;
- unsigned char sectors;
-} mapping_table[4] = { { 16, 63 }, { 64, 32 }, { 64, 63 }, { 64, 32 } };
-
-#ifndef PORT_OVERRIDE
-/* ??? A probe of address 0x310 screws up NE2000 cards */
-static const unsigned short ultrastor_ports_14f[] = {
- 0x330, 0x340, /*0x310,*/ 0x230, 0x240, 0x210, 0x130, 0x140,
-};
-#endif
-
-static void ultrastor_interrupt(void *);
-static irqreturn_t do_ultrastor_interrupt(int, void *);
-static inline void build_sg_list(struct mscp *, struct scsi_cmnd *SCpnt);
-
-
-/* Always called with host lock held */
-
-static inline int find_and_clear_bit_16(unsigned long *field)
-{
- int rv;
-
- if (*field == 0)
- panic("No free mscp");
-
- asm volatile (
- "xorl %0,%0\n\t"
- "0: bsfw %1,%w0\n\t"
- "btr %0,%1\n\t"
- "jnc 0b"
- : "=&r" (rv), "+m" (*field) :);
-
- return rv;
-}
-
-/* This has been re-implemented with the help of Richard Earnshaw,
- <rwe@pegasus.esprit.ec.org> and works with gcc-2.5.8 and gcc-2.6.0.
- The instability noted by jfc below appears to be a bug in
- gcc-2.5.x when compiling w/o optimization. --Caleb
-
- This asm is fragile: it doesn't work without the casts and it may
- not work without optimization. Maybe I should add a swap builtin
- to gcc. --jfc */
-static inline unsigned char xchgb(unsigned char reg,
- volatile unsigned char *mem)
-{
- __asm__ ("xchgb %0,%1" : "=q" (reg), "=m" (*mem) : "0" (reg));
- return reg;
-}
-
-#if ULTRASTOR_DEBUG & (UD_COMMAND | UD_ABORT)
-
-/* Always called with the host lock held */
-static void log_ultrastor_abort(struct ultrastor_config *config,
- int command)
-{
- static char fmt[80] = "abort %d (%x); MSCP free pool: %x;";
- int i;
-
- for (i = 0; i < ULTRASTOR_MAX_CMDS; i++)
- {
- fmt[20 + i*2] = ' ';
- if (! (config->mscp_free & (1 << i)))
- fmt[21 + i*2] = '0' + config->mscp[i].target_id;
- else
- fmt[21 + i*2] = '-';
- }
- fmt[20 + ULTRASTOR_MAX_CMDS * 2] = '\n';
- fmt[21 + ULTRASTOR_MAX_CMDS * 2] = 0;
- printk(fmt, command, &config->mscp[command], config->mscp_free);
-
-}
-#endif
-
-static int ultrastor_14f_detect(struct scsi_host_template * tpnt)
-{
- size_t i;
- unsigned char in_byte, version_byte = 0;
- struct config_1 {
- unsigned char bios_segment: 3;
- unsigned char removable_disks_as_fixed: 1;
- unsigned char interrupt: 2;
- unsigned char dma_channel: 2;
- } config_1;
- struct config_2 {
- unsigned char ha_scsi_id: 3;
- unsigned char mapping_mode: 2;
- unsigned char bios_drive_number: 1;
- unsigned char tfr_port: 2;
- } config_2;
-
-#if (ULTRASTOR_DEBUG & UD_DETECT)
- printk("US14F: detect: called\n");
-#endif
-
- /* If a 24F has already been configured, don't look for a 14F. */
- if (config.bios_segment)
- return FALSE;
-
-#ifdef PORT_OVERRIDE
- if(!request_region(PORT_OVERRIDE, 0xc, "ultrastor")) {
- printk("Ultrastor I/O space already in use\n");
- return FALSE;
- };
- config.port_address = PORT_OVERRIDE;
-#else
- for (i = 0; i < ARRAY_SIZE(ultrastor_ports_14f); i++) {
- if(!request_region(ultrastor_ports_14f[i], 0x0c, "ultrastor")) continue;
- config.port_address = ultrastor_ports_14f[i];
-#endif
-
-#if (ULTRASTOR_DEBUG & UD_DETECT)
- printk("US14F: detect: testing port address %03X\n", config.port_address);
-#endif
-
- in_byte = inb(U14F_PRODUCT_ID(config.port_address));
- if (in_byte != US14F_PRODUCT_ID_0) {
-#if (ULTRASTOR_DEBUG & UD_DETECT)
-# ifdef PORT_OVERRIDE
- printk("US14F: detect: wrong product ID 0 - %02X\n", in_byte);
-# else
- printk("US14F: detect: no adapter at port %03X\n", config.port_address);
-# endif
-#endif
-#ifdef PORT_OVERRIDE
- goto out_release_port;
-#else
- release_region(config.port_address, 0x0c);
- continue;
-#endif
- }
- in_byte = inb(U14F_PRODUCT_ID(config.port_address) + 1);
- /* Only upper nibble is significant for Product ID 1 */
- if ((in_byte & 0xF0) != US14F_PRODUCT_ID_1) {
-#if (ULTRASTOR_DEBUG & UD_DETECT)
-# ifdef PORT_OVERRIDE
- printk("US14F: detect: wrong product ID 1 - %02X\n", in_byte);
-# else
- printk("US14F: detect: no adapter at port %03X\n", config.port_address);
-# endif
-#endif
-#ifdef PORT_OVERRIDE
- goto out_release_port;
-#else
- release_region(config.port_address, 0x0c);
- continue;
-#endif
- }
- version_byte = in_byte;
-#ifndef PORT_OVERRIDE
- break;
- }
- if (i == ARRAY_SIZE(ultrastor_ports_14f)) {
-# if (ULTRASTOR_DEBUG & UD_DETECT)
- printk("US14F: detect: no port address found!\n");
-# endif
- /* all ports probed already released - we can just go straight out */
- return FALSE;
- }
-#endif
-
-#if (ULTRASTOR_DEBUG & UD_DETECT)
- printk("US14F: detect: adapter found at port address %03X\n",
- config.port_address);
-#endif
-
- /* Set local doorbell mask to disallow bus reset unless
- ultrastor_bus_reset is true. */
- outb(ultrastor_bus_reset ? 0xc2 : 0x82, LCL_DOORBELL_MASK(config.port_address));
-
- /* All above tests passed, must be the right thing. Get some useful
- info. */
-
- /* Register the I/O space that we use */
-
- *(char *)&config_1 = inb(CONFIG(config.port_address + 0));
- *(char *)&config_2 = inb(CONFIG(config.port_address + 1));
- config.bios_segment = bios_segment_table[config_1.bios_segment];
- config.doorbell_address = config.port_address;
- config.ogm_address = config.port_address + 0x8;
- config.icm_address = config.port_address + 0xC;
- config.interrupt = interrupt_table_14f[config_1.interrupt];
- config.ha_scsi_id = config_2.ha_scsi_id;
- config.heads = mapping_table[config_2.mapping_mode].heads;
- config.sectors = mapping_table[config_2.mapping_mode].sectors;
- config.bios_drive_number = config_2.bios_drive_number;
- config.subversion = (version_byte & 0x0F);
- if (config.subversion == U34F)
- config.dma_channel = 0;
- else
- config.dma_channel = dma_channel_table_14f[config_1.dma_channel];
-
- if (!config.bios_segment) {
-#if (ULTRASTOR_DEBUG & UD_DETECT)
- printk("US14F: detect: not detected.\n");
-#endif
- goto out_release_port;
- }
-
- /* Final consistency check, verify previous info. */
- if (config.subversion != U34F)
- if (!config.dma_channel || !(config_2.tfr_port & 0x2)) {
-#if (ULTRASTOR_DEBUG & UD_DETECT)
- printk("US14F: detect: consistency check failed\n");
-#endif
- goto out_release_port;
- }
-
- /* If we were TRULY paranoid, we could issue a host adapter inquiry
- command here and verify the data returned. But frankly, I'm
- exhausted! */
-
- /* Finally! Now I'm satisfied... */
-#if (ULTRASTOR_DEBUG & UD_DETECT)
- printk("US14F: detect: detect succeeded\n"
- " Port address: %03X\n"
- " BIOS segment: %05X\n"
- " Interrupt: %u\n"
- " DMA channel: %u\n"
- " H/A SCSI ID: %u\n"
- " Subversion: %u\n",
- config.port_address, config.bios_segment, config.interrupt,
- config.dma_channel, config.ha_scsi_id, config.subversion);
-#endif
- tpnt->this_id = config.ha_scsi_id;
- tpnt->unchecked_isa_dma = (config.subversion != U34F);
-
-#if ULTRASTOR_MAX_CMDS > 1
- config.mscp_free = ~0;
-#endif
-
- /*
- * Brrr, &config.mscp[0].SCint->host) it is something magical....
- * XXX and FIXME
- */
- if (request_irq(config.interrupt, do_ultrastor_interrupt, 0, "Ultrastor", &config.mscp[0].SCint->device->host)) {
- printk("Unable to allocate IRQ%u for UltraStor controller.\n",
- config.interrupt);
- goto out_release_port;
- }
- if (config.dma_channel && request_dma(config.dma_channel,"Ultrastor")) {
- printk("Unable to allocate DMA channel %u for UltraStor controller.\n",
- config.dma_channel);
- free_irq(config.interrupt, NULL);
- goto out_release_port;
- }
- tpnt->sg_tablesize = ULTRASTOR_14F_MAX_SG;
- printk("UltraStor driver version" VERSION ". Using %d SG lists.\n",
- ULTRASTOR_14F_MAX_SG);
-
- return TRUE;
-out_release_port:
- release_region(config.port_address, 0x0c);
- return FALSE;
-}
-
-static int ultrastor_24f_detect(struct scsi_host_template * tpnt)
-{
- int i;
- struct Scsi_Host * shpnt = NULL;
-
-#if (ULTRASTOR_DEBUG & UD_DETECT)
- printk("US24F: detect");
-#endif
-
- /* probe each EISA slot at slot address C80 */
- for (i = 1; i < 15; i++)
- {
- unsigned char config_1, config_2;
- unsigned short addr = (i << 12) | ULTRASTOR_24F_PORT;
-
- if (inb(addr) != US24F_PRODUCT_ID_0 &&
- inb(addr+1) != US24F_PRODUCT_ID_1 &&
- inb(addr+2) != US24F_PRODUCT_ID_2)
- continue;
-
- config.revision = inb(addr+3);
- config.slot = i;
- if (! (inb(addr+4) & 1))
- {
-#if (ULTRASTOR_DEBUG & UD_DETECT)
- printk("U24F: found disabled card in slot %u\n", i);
-#endif
- continue;
- }
-#if (ULTRASTOR_DEBUG & UD_DETECT)
- printk("U24F: found card in slot %u\n", i);
-#endif
- config_1 = inb(addr + 5);
- config.bios_segment = bios_segment_table[config_1 & 7];
- switch(config_1 >> 4)
- {
- case 1:
- config.interrupt = 15;
- break;
- case 2:
- config.interrupt = 14;
- break;
- case 4:
- config.interrupt = 11;
- break;
- case 8:
- config.interrupt = 10;
- break;
- default:
- printk("U24F: invalid IRQ\n");
- return FALSE;
- }
-
- /* BIOS addr set */
- /* base port set */
- config.port_address = addr;
- config.doorbell_address = addr + 12;
- config.ogm_address = addr + 0x17;
- config.icm_address = addr + 0x1C;
- config_2 = inb(addr + 7);
- config.ha_scsi_id = config_2 & 7;
- config.heads = mapping_table[(config_2 >> 3) & 3].heads;
- config.sectors = mapping_table[(config_2 >> 3) & 3].sectors;
-#if (ULTRASTOR_DEBUG & UD_DETECT)
- printk("US24F: detect: detect succeeded\n"
- " Port address: %03X\n"
- " BIOS segment: %05X\n"
- " Interrupt: %u\n"
- " H/A SCSI ID: %u\n",
- config.port_address, config.bios_segment,
- config.interrupt, config.ha_scsi_id);
-#endif
- tpnt->this_id = config.ha_scsi_id;
- tpnt->unchecked_isa_dma = 0;
- tpnt->sg_tablesize = ULTRASTOR_24F_MAX_SG;
-
- shpnt = scsi_register(tpnt, 0);
- if (!shpnt) {
- printk(KERN_WARNING "(ultrastor:) Could not register scsi device. Aborting registration.\n");
- free_irq(config.interrupt, do_ultrastor_interrupt);
- return FALSE;
- }
-
- if (request_irq(config.interrupt, do_ultrastor_interrupt, 0, "Ultrastor", shpnt))
- {
- printk("Unable to allocate IRQ%u for UltraStor controller.\n",
- config.interrupt);
- return FALSE;
- }
-
- shpnt->irq = config.interrupt;
- shpnt->dma_channel = config.dma_channel;
- shpnt->io_port = config.port_address;
-
-#if ULTRASTOR_MAX_CMDS > 1
- config.mscp_free = ~0;
-#endif
- /* Mark ICM and OGM free */
- outb(0, addr + 0x16);
- outb(0, addr + 0x1B);
-
- /* Set local doorbell mask to disallow bus reset unless
- ultrastor_bus_reset is true. */
- outb(ultrastor_bus_reset ? 0xc2 : 0x82, LCL_DOORBELL_MASK(addr+12));
- outb(0x02, SYS_DOORBELL_MASK(addr+12));
- printk("UltraStor driver version " VERSION ". Using %d SG lists.\n",
- tpnt->sg_tablesize);
- return TRUE;
- }
- return FALSE;
-}
-
-static int ultrastor_detect(struct scsi_host_template * tpnt)
-{
- tpnt->proc_name = "ultrastor";
- return ultrastor_14f_detect(tpnt) || ultrastor_24f_detect(tpnt);
-}
-
-static int ultrastor_release(struct Scsi_Host *shost)
-{
- if (shost->irq)
- free_irq(shost->irq, NULL);
- if (shost->dma_channel != 0xff)
- free_dma(shost->dma_channel);
- if (shost->io_port && shost->n_io_port)
- release_region(shost->io_port, shost->n_io_port);
- scsi_unregister(shost);
- return 0;
-}
-
-static const char *ultrastor_info(struct Scsi_Host * shpnt)
-{
- static char buf[64];
-
- if (config.slot)
- sprintf(buf, "UltraStor 24F SCSI @ Slot %u IRQ%u",
- config.slot, config.interrupt);
- else if (config.subversion)
- sprintf(buf, "UltraStor 34F SCSI @ Port %03X BIOS %05X IRQ%u",
- config.port_address, (int)config.bios_segment,
- config.interrupt);
- else
- sprintf(buf, "UltraStor 14F SCSI @ Port %03X BIOS %05X IRQ%u DMA%u",
- config.port_address, (int)config.bios_segment,
- config.interrupt, config.dma_channel);
- return buf;
-}
-
-static inline void build_sg_list(struct mscp *mscp, struct scsi_cmnd *SCpnt)
-{
- struct scatterlist *sg;
- long transfer_length = 0;
- int i, max;
-
- max = scsi_sg_count(SCpnt);
- scsi_for_each_sg(SCpnt, sg, max, i) {
- mscp->sglist[i].address = isa_page_to_bus(sg_page(sg)) + sg->offset;
- mscp->sglist[i].num_bytes = sg->length;
- transfer_length += sg->length;
- }
- mscp->number_of_sg_list = max;
- mscp->transfer_data = isa_virt_to_bus(mscp->sglist);
- /* ??? May not be necessary. Docs are unclear as to whether transfer
- length field is ignored or whether it should be set to the total
- number of bytes of the transfer. */
- mscp->transfer_data_length = transfer_length;
-}
-
-static int ultrastor_queuecommand_lck(struct scsi_cmnd *SCpnt,
- void (*done) (struct scsi_cmnd *))
-{
- struct mscp *my_mscp;
-#if ULTRASTOR_MAX_CMDS > 1
- int mscp_index;
-#endif
- unsigned int status;
-
- /* Next test is for debugging; "can't happen" */
- if ((config.mscp_free & ((1U << ULTRASTOR_MAX_CMDS) - 1)) == 0)
- panic("ultrastor_queuecommand: no free MSCP\n");
- mscp_index = find_and_clear_bit_16(&config.mscp_free);
-
- /* Has the command been aborted? */
- if (xchgb(0xff, &config.aborted[mscp_index]) != 0)
- {
- status = DID_ABORT << 16;
- goto aborted;
- }
-
- my_mscp = &config.mscp[mscp_index];
-
- *(unsigned char *)my_mscp = OP_SCSI | (DTD_SCSI << 3);
-
- /* Tape drives don't work properly if the cache is used. The SCSI
- READ command for a tape doesn't have a block offset, and the adapter
- incorrectly assumes that all reads from the tape read the same
- blocks. Results will depend on read buffer size and other disk
- activity.
-
- ??? Which other device types should never use the cache? */
- my_mscp->ca = SCpnt->device->type != TYPE_TAPE;
- my_mscp->target_id = SCpnt->device->id;
- my_mscp->ch_no = 0;
- my_mscp->lun = SCpnt->device->lun;
- if (scsi_sg_count(SCpnt)) {
- /* Set scatter/gather flag in SCSI command packet */
- my_mscp->sg = TRUE;
- build_sg_list(my_mscp, SCpnt);
- } else {
- /* Unset scatter/gather flag in SCSI command packet */
- my_mscp->sg = FALSE;
- my_mscp->transfer_data = isa_virt_to_bus(scsi_sglist(SCpnt));
- my_mscp->transfer_data_length = scsi_bufflen(SCpnt);
- }
- my_mscp->command_link = 0; /*???*/
- my_mscp->scsi_command_link_id = 0; /*???*/
- my_mscp->length_of_sense_byte = SCSI_SENSE_BUFFERSIZE;
- my_mscp->length_of_scsi_cdbs = SCpnt->cmd_len;
- memcpy(my_mscp->scsi_cdbs, SCpnt->cmnd, my_mscp->length_of_scsi_cdbs);
- my_mscp->adapter_status = 0;
- my_mscp->target_status = 0;
- my_mscp->sense_data = isa_virt_to_bus(&SCpnt->sense_buffer);
- my_mscp->done = done;
- my_mscp->SCint = SCpnt;
- SCpnt->host_scribble = (unsigned char *)my_mscp;
-
- /* Find free OGM slot. On 24F, look for OGM status byte == 0.
- On 14F and 34F, wait for local interrupt pending flag to clear.
-
- FIXME: now we are using new_eh we should punt here and let the
- midlayer sort it out */
-
-retry:
- if (config.slot)
- while (inb(config.ogm_address - 1) != 0 && config.aborted[mscp_index] == 0xff)
- barrier();
-
- /* else??? */
-
- while ((inb(LCL_DOORBELL_INTR(config.doorbell_address)) & (config.slot ? 2 : 1)) && config.aborted[mscp_index] == 0xff)
- barrier();
-
- /* To avoid race conditions, keep the code to write to the adapter
- atomic. This simplifies the abort code. Right now the
- scsi mid layer has the host_lock already held
- */
-
- if (inb(LCL_DOORBELL_INTR(config.doorbell_address)) & (config.slot ? 2 : 1))
- goto retry;
-
- status = xchgb(0, &config.aborted[mscp_index]);
- if (status != 0xff) {
-
-#if ULTRASTOR_DEBUG & (UD_COMMAND | UD_ABORT)
- printk("USx4F: queuecommand: aborted\n");
-#if ULTRASTOR_MAX_CMDS > 1
- log_ultrastor_abort(&config, mscp_index);
-#endif
-#endif
- status <<= 16;
-
- aborted:
- set_bit(mscp_index, &config.mscp_free);
- /* If the driver queues commands, call the done proc here. Otherwise
- return an error. */
-#if ULTRASTOR_MAX_CMDS > 1
- SCpnt->result = status;
- done(SCpnt);
- return 0;
-#else
- return status;
-#endif
- }
-
- /* Store pointer in OGM address bytes */
- outl(isa_virt_to_bus(my_mscp), config.ogm_address);
-
- /* Issue OGM interrupt */
- if (config.slot) {
- /* Write OGM command register on 24F */
- outb(1, config.ogm_address - 1);
- outb(0x2, LCL_DOORBELL_INTR(config.doorbell_address));
- } else {
- outb(0x1, LCL_DOORBELL_INTR(config.doorbell_address));
- }
-
-#if (ULTRASTOR_DEBUG & UD_COMMAND)
- printk("USx4F: queuecommand: returning\n");
-#endif
-
- return 0;
-}
-
-static DEF_SCSI_QCMD(ultrastor_queuecommand)
-
-/* This code must deal with 2 cases:
-
- 1. The command has not been written to the OGM. In this case, set
- the abort flag and return.
-
- 2. The command has been written to the OGM and is stuck somewhere in
- the adapter.
-
- 2a. On a 24F, ask the adapter to abort the command. It will interrupt
- when it does.
-
- 2b. Call the command's done procedure.
-
- */
-
-static int ultrastor_abort(struct scsi_cmnd *SCpnt)
-{
-#if ULTRASTOR_DEBUG & UD_ABORT
- char out[108];
- unsigned char icm_status = 0, ogm_status = 0;
- unsigned int icm_addr = 0, ogm_addr = 0;
-#endif
- unsigned int mscp_index;
- unsigned char old_aborted;
- unsigned long flags;
- void (*done)(struct scsi_cmnd *);
- struct Scsi_Host *host = SCpnt->device->host;
-
- if(config.slot)
- return FAILED; /* Do not attempt an abort for the 24f */
-
- /* Simple consistency checking */
- if(!SCpnt->host_scribble)
- return FAILED;
-
- mscp_index = ((struct mscp *)SCpnt->host_scribble) - config.mscp;
- if (mscp_index >= ULTRASTOR_MAX_CMDS)
- panic("Ux4F aborting invalid MSCP");
-
-#if ULTRASTOR_DEBUG & UD_ABORT
- if (config.slot)
- {
- int port0 = (config.slot << 12) | 0xc80;
- int i;
- unsigned long flags;
-
- spin_lock_irqsave(host->host_lock, flags);
- strcpy(out, "OGM %d:%x ICM %d:%x ports: ");
- for (i = 0; i < 16; i++)
- {
- unsigned char p = inb(port0 + i);
- out[28 + i * 3] = "0123456789abcdef"[p >> 4];
- out[29 + i * 3] = "0123456789abcdef"[p & 15];
- out[30 + i * 3] = ' ';
- }
- out[28 + i * 3] = '\n';
- out[29 + i * 3] = 0;
- ogm_status = inb(port0 + 22);
- ogm_addr = (unsigned int)isa_bus_to_virt(inl(port0 + 23));
- icm_status = inb(port0 + 27);
- icm_addr = (unsigned int)isa_bus_to_virt(inl(port0 + 28));
- spin_unlock_irqrestore(host->host_lock, flags);
- }
-
- /* First check to see if an interrupt is pending. I suspect the SiS
- chipset loses interrupts. (I also suspect is mangles data, but
- one bug at a time... */
- if (config.slot ? inb(config.icm_address - 1) == 2 :
- (inb(SYS_DOORBELL_INTR(config.doorbell_address)) & 1))
- {
- printk("Ux4F: abort while completed command pending\n");
-
- spin_lock_irqsave(host->host_lock, flags);
- /* FIXME: Ewww... need to think about passing host around properly */
- ultrastor_interrupt(NULL);
- spin_unlock_irqrestore(host->host_lock, flags);
- return SUCCESS;
- }
-#endif
-
- old_aborted = xchgb(DID_ABORT, &config.aborted[mscp_index]);
-
- /* aborted == 0xff is the signal that queuecommand has not yet sent
- the command. It will notice the new abort flag and fail. */
- if (old_aborted == 0xff)
- return SUCCESS;
-
- /* On 24F, send an abort MSCP request. The adapter will interrupt
- and the interrupt handler will call done. */
- if (config.slot && inb(config.ogm_address - 1) == 0)
- {
- unsigned long flags;
-
- spin_lock_irqsave(host->host_lock, flags);
- outl(isa_virt_to_bus(&config.mscp[mscp_index]), config.ogm_address);
- udelay(8);
- outb(0x80, config.ogm_address - 1);
- outb(0x2, LCL_DOORBELL_INTR(config.doorbell_address));
-#if ULTRASTOR_DEBUG & UD_ABORT
- log_ultrastor_abort(&config, mscp_index);
- printk(out, ogm_status, ogm_addr, icm_status, icm_addr);
-#endif
- spin_unlock_irqrestore(host->host_lock, flags);
- /* FIXME: add a wait for the abort to complete */
- return SUCCESS;
- }
-
-#if ULTRASTOR_DEBUG & UD_ABORT
- log_ultrastor_abort(&config, mscp_index);
-#endif
-
- /* Can't request a graceful abort. Either this is not a 24F or
- the OGM is busy. Don't free the command -- the adapter might
- still be using it. Setting SCint = 0 causes the interrupt
- handler to ignore the command. */
-
- /* FIXME - devices that implement soft resets will still be running
- the command after a bus reset. We would probably rather leave
- the command in the queue. The upper level code will automatically
- leave the command in the active state instead of requeueing it. ERY */
-
-#if ULTRASTOR_DEBUG & UD_ABORT
- if (config.mscp[mscp_index].SCint != SCpnt)
- printk("abort: command mismatch, %p != %p\n",
- config.mscp[mscp_index].SCint, SCpnt);
-#endif
- if (config.mscp[mscp_index].SCint == NULL)
- return FAILED;
-
- if (config.mscp[mscp_index].SCint != SCpnt) panic("Bad abort");
- config.mscp[mscp_index].SCint = NULL;
- done = config.mscp[mscp_index].done;
- config.mscp[mscp_index].done = NULL;
- SCpnt->result = DID_ABORT << 16;
-
- /* Take the host lock to guard against scsi layer re-entry */
- done(SCpnt);
-
- /* Need to set a timeout here in case command never completes. */
- return SUCCESS;
-}
-
-static int ultrastor_host_reset(struct scsi_cmnd * SCpnt)
-{
- unsigned long flags;
- int i;
- struct Scsi_Host *host = SCpnt->device->host;
-
-#if (ULTRASTOR_DEBUG & UD_RESET)
- printk("US14F: reset: called\n");
-#endif
-
- if(config.slot)
- return FAILED;
-
- spin_lock_irqsave(host->host_lock, flags);
- /* Reset the adapter and SCSI bus. The SCSI bus reset can be
- inhibited by clearing ultrastor_bus_reset before probe. */
- outb(0xc0, LCL_DOORBELL_INTR(config.doorbell_address));
- if (config.slot)
- {
- outb(0, config.ogm_address - 1);
- outb(0, config.icm_address - 1);
- }
-
-#if ULTRASTOR_MAX_CMDS == 1
- if (config.mscp_busy && config.mscp->done && config.mscp->SCint)
- {
- config.mscp->SCint->result = DID_RESET << 16;
- config.mscp->done(config.mscp->SCint);
- }
- config.mscp->SCint = 0;
-#else
- for (i = 0; i < ULTRASTOR_MAX_CMDS; i++)
- {
- if (! (config.mscp_free & (1 << i)) &&
- config.mscp[i].done && config.mscp[i].SCint)
- {
- config.mscp[i].SCint->result = DID_RESET << 16;
- config.mscp[i].done(config.mscp[i].SCint);
- config.mscp[i].done = NULL;
- }
- config.mscp[i].SCint = NULL;
- }
-#endif
-
- /* FIXME - if the device implements soft resets, then the command
- will still be running. ERY
-
- Even bigger deal with new_eh!
- */
-
- memset((unsigned char *)config.aborted, 0, sizeof config.aborted);
-#if ULTRASTOR_MAX_CMDS == 1
- config.mscp_busy = 0;
-#else
- config.mscp_free = ~0;
-#endif
-
- spin_unlock_irqrestore(host->host_lock, flags);
- return SUCCESS;
-
-}
-
-int ultrastor_biosparam(struct scsi_device *sdev, struct block_device *bdev,
- sector_t capacity, int * dkinfo)
-{
- int size = capacity;
- unsigned int s = config.heads * config.sectors;
-
- dkinfo[0] = config.heads;
- dkinfo[1] = config.sectors;
- dkinfo[2] = size / s; /* Ignore partial cylinders */
-#if 0
- if (dkinfo[2] > 1024)
- dkinfo[2] = 1024;
-#endif
- return 0;
-}
-
-static void ultrastor_interrupt(void *dev_id)
-{
- unsigned int status;
-#if ULTRASTOR_MAX_CMDS > 1
- unsigned int mscp_index;
-#endif
- struct mscp *mscp;
- void (*done) (struct scsi_cmnd *);
- struct scsi_cmnd *SCtmp;
-
-#if ULTRASTOR_MAX_CMDS == 1
- mscp = &config.mscp[0];
-#else
- mscp = (struct mscp *)isa_bus_to_virt(inl(config.icm_address));
- mscp_index = mscp - config.mscp;
- if (mscp_index >= ULTRASTOR_MAX_CMDS) {
- printk("Ux4F interrupt: bad MSCP address %x\n", (unsigned int) mscp);
- /* A command has been lost. Reset and report an error
- for all commands. */
- ultrastor_host_reset(dev_id);
- return;
- }
-#endif
-
- /* Clean ICM slot (set ICMINT bit to 0) */
- if (config.slot) {
- unsigned char icm_status = inb(config.icm_address - 1);
-#if ULTRASTOR_DEBUG & (UD_INTERRUPT|UD_ERROR|UD_ABORT)
- if (icm_status != 1 && icm_status != 2)
- printk("US24F: ICM status %x for MSCP %d (%x)\n", icm_status,
- mscp_index, (unsigned int) mscp);
-#endif
- /* The manual says clear interrupt then write 0 to ICM status.
- This seems backwards, but I'll do it anyway. --jfc */
- outb(2, SYS_DOORBELL_INTR(config.doorbell_address));
- outb(0, config.icm_address - 1);
- if (icm_status == 4) {
- printk("UltraStor abort command failed\n");
- return;
- }
- if (icm_status == 3) {
- void (*done)(struct scsi_cmnd *) = mscp->done;
- if (done) {
- mscp->done = NULL;
- mscp->SCint->result = DID_ABORT << 16;
- done(mscp->SCint);
- }
- return;
- }
- } else {
- outb(1, SYS_DOORBELL_INTR(config.doorbell_address));
- }
-
- SCtmp = mscp->SCint;
- mscp->SCint = NULL;
-
- if (!SCtmp)
- {
-#if ULTRASTOR_DEBUG & (UD_ABORT|UD_INTERRUPT)
- printk("MSCP %d (%x): no command\n", mscp_index, (unsigned int) mscp);
-#endif
-#if ULTRASTOR_MAX_CMDS == 1
- config.mscp_busy = FALSE;
-#else
- set_bit(mscp_index, &config.mscp_free);
-#endif
- config.aborted[mscp_index] = 0;
- return;
- }
-
- /* Save done locally and zero before calling. This is needed as
- once we call done, we may get another command queued before this
- interrupt service routine can return. */
- done = mscp->done;
- mscp->done = NULL;
-
- /* Let the higher levels know that we're done */
- switch (mscp->adapter_status)
- {
- case 0:
- status = DID_OK << 16;
- break;
- case 0x01: /* invalid command */
- case 0x02: /* invalid parameters */
- case 0x03: /* invalid data list */
- default:
- status = DID_ERROR << 16;
- break;
- case 0x84: /* SCSI bus abort */
- status = DID_ABORT << 16;
- break;
- case 0x91:
- status = DID_TIME_OUT << 16;
- break;
- }
-
- SCtmp->result = status | mscp->target_status;
-
- SCtmp->host_scribble = NULL;
-
- /* Free up mscp block for next command */
-#if ULTRASTOR_MAX_CMDS == 1
- config.mscp_busy = FALSE;
-#else
- set_bit(mscp_index, &config.mscp_free);
-#endif
-
-#if ULTRASTOR_DEBUG & (UD_ABORT|UD_INTERRUPT)
- if (config.aborted[mscp_index])
- printk("Ux4 interrupt: MSCP %d (%x) aborted = %d\n",
- mscp_index, (unsigned int) mscp, config.aborted[mscp_index]);
-#endif
- config.aborted[mscp_index] = 0;
-
- if (done)
- done(SCtmp);
- else
- printk("US14F: interrupt: unexpected interrupt\n");
-
- if (config.slot ? inb(config.icm_address - 1) :
- (inb(SYS_DOORBELL_INTR(config.doorbell_address)) & 1))
-#if (ULTRASTOR_DEBUG & UD_MULTI_CMD)
- printk("Ux4F: multiple commands completed\n");
-#else
- ;
-#endif
-
-#if (ULTRASTOR_DEBUG & UD_INTERRUPT)
- printk("USx4F: interrupt: returning\n");
-#endif
-}
-
-static irqreturn_t do_ultrastor_interrupt(int irq, void *dev_id)
-{
- unsigned long flags;
- struct Scsi_Host *dev = dev_id;
-
- spin_lock_irqsave(dev->host_lock, flags);
- ultrastor_interrupt(dev_id);
- spin_unlock_irqrestore(dev->host_lock, flags);
- return IRQ_HANDLED;
-}
-
-MODULE_LICENSE("GPL");
-
-static struct scsi_host_template driver_template = {
- .name = "UltraStor 14F/24F/34F",
- .detect = ultrastor_detect,
- .release = ultrastor_release,
- .info = ultrastor_info,
- .queuecommand = ultrastor_queuecommand,
- .eh_abort_handler = ultrastor_abort,
- .eh_host_reset_handler = ultrastor_host_reset,
- .bios_param = ultrastor_biosparam,
- .can_queue = ULTRASTOR_MAX_CMDS,
- .sg_tablesize = ULTRASTOR_14F_MAX_SG,
- .cmd_per_lun = ULTRASTOR_MAX_CMDS_PER_LUN,
- .unchecked_isa_dma = 1,
- .use_clustering = ENABLE_CLUSTERING,
-};
-#include "scsi_module.c"
projects / platform / kernel / linux-amlogic.git / commitdiff