| /* | |
| * 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 | |
| * ([email protected]) | |
| * scatter/gather added by Scott Taylor ([email protected]) | |
| * 24F and multiple command support by John F. Carr ([email protected]) | |
| * John's work modified by Caleb Epstein ([email protected]) and | |
| * Eric Youngdale ([email protected]). | |
| * 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 <[email protected]> | |
| */ | |
| /* 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 ([email protected]) */ | |
| /* 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, | |
| <[email protected]> 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" |