diff options
Diffstat (limited to 'drivers/scsi/aic7xxx/aic79xx_osm.c')
| -rw-r--r-- | drivers/scsi/aic7xxx/aic79xx_osm.c | 2851 |
1 files changed, 2851 insertions, 0 deletions
diff --git a/drivers/scsi/aic7xxx/aic79xx_osm.c b/drivers/scsi/aic7xxx/aic79xx_osm.c new file mode 100644 index 000000000..f2f3405cd --- /dev/null +++ b/drivers/scsi/aic7xxx/aic79xx_osm.c @@ -0,0 +1,2851 @@ +/* + * Adaptec AIC79xx device driver for Linux. + * + * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $ + * + * -------------------------------------------------------------------------- + * Copyright (c) 1994-2000 Justin T. Gibbs. + * Copyright (c) 1997-1999 Doug Ledford + * Copyright (c) 2000-2003 Adaptec Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#include "aic79xx_osm.h" +#include "aic79xx_inline.h" +#include <scsi/scsicam.h> + +static struct scsi_transport_template *ahd_linux_transport_template = NULL; + +#include <linux/init.h> /* __setup */ +#include <linux/mm.h> /* For fetching system memory size */ +#include <linux/blkdev.h> /* For block_size() */ +#include <linux/delay.h> /* For ssleep/msleep */ +#include <linux/device.h> +#include <linux/slab.h> + +/* + * Bucket size for counting good commands in between bad ones. + */ +#define AHD_LINUX_ERR_THRESH 1000 + +/* + * Set this to the delay in seconds after SCSI bus reset. + * Note, we honor this only for the initial bus reset. + * The scsi error recovery code performs its own bus settle + * delay handling for error recovery actions. + */ +#ifdef CONFIG_AIC79XX_RESET_DELAY_MS +#define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS +#else +#define AIC79XX_RESET_DELAY 5000 +#endif + +/* + * To change the default number of tagged transactions allowed per-device, + * add a line to the lilo.conf file like: + * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" + * which will result in the first four devices on the first two + * controllers being set to a tagged queue depth of 32. + * + * The tag_commands is an array of 16 to allow for wide and twin adapters. + * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 + * for channel 1. + */ +typedef struct { + uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */ +} adapter_tag_info_t; + +/* + * Modify this as you see fit for your system. + * + * 0 tagged queuing disabled + * 1 <= n <= 253 n == max tags ever dispatched. + * + * The driver will throttle the number of commands dispatched to a + * device if it returns queue full. For devices with a fixed maximum + * queue depth, the driver will eventually determine this depth and + * lock it in (a console message is printed to indicate that a lock + * has occurred). On some devices, queue full is returned for a temporary + * resource shortage. These devices will return queue full at varying + * depths. The driver will throttle back when the queue fulls occur and + * attempt to slowly increase the depth over time as the device recovers + * from the resource shortage. + * + * In this example, the first line will disable tagged queueing for all + * the devices on the first probed aic79xx adapter. + * + * The second line enables tagged queueing with 4 commands/LUN for IDs + * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the + * driver to attempt to use up to 64 tags for ID 1. + * + * The third line is the same as the first line. + * + * The fourth line disables tagged queueing for devices 0 and 3. It + * enables tagged queueing for the other IDs, with 16 commands/LUN + * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for + * IDs 2, 5-7, and 9-15. + */ + +/* + * NOTE: The below structure is for reference only, the actual structure + * to modify in order to change things is just below this comment block. +adapter_tag_info_t aic79xx_tag_info[] = +{ + {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, + {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, + {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, + {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} +}; +*/ + +#ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE +#define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE +#else +#define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE +#endif + +#define AIC79XX_CONFIGED_TAG_COMMANDS { \ + AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ + AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ + AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ + AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ + AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ + AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ + AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ + AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \ +} + +/* + * By default, use the number of commands specified by + * the users kernel configuration. + */ +static adapter_tag_info_t aic79xx_tag_info[] = +{ + {AIC79XX_CONFIGED_TAG_COMMANDS}, + {AIC79XX_CONFIGED_TAG_COMMANDS}, + {AIC79XX_CONFIGED_TAG_COMMANDS}, + {AIC79XX_CONFIGED_TAG_COMMANDS}, + {AIC79XX_CONFIGED_TAG_COMMANDS}, + {AIC79XX_CONFIGED_TAG_COMMANDS}, + {AIC79XX_CONFIGED_TAG_COMMANDS}, + {AIC79XX_CONFIGED_TAG_COMMANDS}, + {AIC79XX_CONFIGED_TAG_COMMANDS}, + {AIC79XX_CONFIGED_TAG_COMMANDS}, + {AIC79XX_CONFIGED_TAG_COMMANDS}, + {AIC79XX_CONFIGED_TAG_COMMANDS}, + {AIC79XX_CONFIGED_TAG_COMMANDS}, + {AIC79XX_CONFIGED_TAG_COMMANDS}, + {AIC79XX_CONFIGED_TAG_COMMANDS}, + {AIC79XX_CONFIGED_TAG_COMMANDS} +}; + +/* + * The I/O cell on the chip is very configurable in respect to its analog + * characteristics. Set the defaults here; they can be overriden with + * the proper insmod parameters. + */ +struct ahd_linux_iocell_opts +{ + uint8_t precomp; + uint8_t slewrate; + uint8_t amplitude; +}; +#define AIC79XX_DEFAULT_PRECOMP 0xFF +#define AIC79XX_DEFAULT_SLEWRATE 0xFF +#define AIC79XX_DEFAULT_AMPLITUDE 0xFF +#define AIC79XX_DEFAULT_IOOPTS \ +{ \ + AIC79XX_DEFAULT_PRECOMP, \ + AIC79XX_DEFAULT_SLEWRATE, \ + AIC79XX_DEFAULT_AMPLITUDE \ +} +#define AIC79XX_PRECOMP_INDEX 0 +#define AIC79XX_SLEWRATE_INDEX 1 +#define AIC79XX_AMPLITUDE_INDEX 2 +static struct ahd_linux_iocell_opts aic79xx_iocell_info[] __ro_after_init = +{ + AIC79XX_DEFAULT_IOOPTS, + AIC79XX_DEFAULT_IOOPTS, + AIC79XX_DEFAULT_IOOPTS, + AIC79XX_DEFAULT_IOOPTS, + AIC79XX_DEFAULT_IOOPTS, + AIC79XX_DEFAULT_IOOPTS, + AIC79XX_DEFAULT_IOOPTS, + AIC79XX_DEFAULT_IOOPTS, + AIC79XX_DEFAULT_IOOPTS, + AIC79XX_DEFAULT_IOOPTS, + AIC79XX_DEFAULT_IOOPTS, + AIC79XX_DEFAULT_IOOPTS, + AIC79XX_DEFAULT_IOOPTS, + AIC79XX_DEFAULT_IOOPTS, + AIC79XX_DEFAULT_IOOPTS, + AIC79XX_DEFAULT_IOOPTS +}; + +/* + * There should be a specific return value for this in scsi.h, but + * it seems that most drivers ignore it. + */ +#define DID_UNDERFLOW DID_ERROR + +void +ahd_print_path(struct ahd_softc *ahd, struct scb *scb) +{ + printk("(scsi%d:%c:%d:%d): ", + ahd->platform_data->host->host_no, + scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X', + scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1, + scb != NULL ? SCB_GET_LUN(scb) : -1); +} + +/* + * XXX - these options apply unilaterally to _all_ adapters + * cards in the system. This should be fixed. Exceptions to this + * rule are noted in the comments. + */ + +/* + * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This + * has no effect on any later resets that might occur due to things like + * SCSI bus timeouts. + */ +static uint32_t aic79xx_no_reset; + +/* + * 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 + */ +static uint32_t aic79xx_extended; + +/* + * PCI bus parity checking of the Adaptec controllers. This is somewhat + * dubious at best. To my knowledge, this option has never actually + * solved a PCI parity problem, but on certain machines with broken PCI + * chipset configurations, it can generate tons of false error messages. + * It's included in the driver for completeness. + * 0 = Shut off PCI parity check + * non-0 = Enable PCI parity check + * + * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this + * variable to -1 you would actually want to simply pass the variable + * name without a number. That will invert the 0 which will result in + * -1. + */ +static uint32_t aic79xx_pci_parity = ~0; + +/* + * There are lots of broken chipsets in the world. Some of them will + * violate the PCI spec when we issue byte sized memory writes to our + * controller. I/O mapped register access, if allowed by the given + * platform, will work in almost all cases. + */ +uint32_t aic79xx_allow_memio = ~0; + +/* + * So that we can set how long each device is given as a selection timeout. + * The table of values goes like this: + * 0 - 256ms + * 1 - 128ms + * 2 - 64ms + * 3 - 32ms + * We default to 256ms because some older devices need a longer time + * to respond to initial selection. + */ +static uint32_t aic79xx_seltime; + +/* + * Certain devices do not perform any aging on commands. Should the + * device be saturated by commands in one portion of the disk, it is + * possible for transactions on far away sectors to never be serviced. + * To handle these devices, we can periodically send an ordered tag to + * force all outstanding transactions to be serviced prior to a new + * transaction. + */ +static uint32_t aic79xx_periodic_otag; + +/* Some storage boxes are using an LSI chip which has a bug making it + * impossible to use aic79xx Rev B chip in 320 speeds. The following + * storage boxes have been reported to be buggy: + * EonStor 3U 16-Bay: U16U-G3A3 + * EonStor 2U 12-Bay: U12U-G3A3 + * SentinelRAID: 2500F R5 / R6 + * SentinelRAID: 2500F R1 + * SentinelRAID: 2500F/1500F + * SentinelRAID: 150F + * + * To get around this LSI bug, you can set your board to 160 mode + * or you can enable the SLOWCRC bit. + */ +uint32_t aic79xx_slowcrc; + +/* + * Module information and settable options. + */ +static char *aic79xx = NULL; + +MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); +MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver"); +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_VERSION(AIC79XX_DRIVER_VERSION); +module_param(aic79xx, charp, 0444); +MODULE_PARM_DESC(aic79xx, +"period-delimited options string:\n" +" verbose Enable verbose/diagnostic logging\n" +" allow_memio Allow device registers to be memory mapped\n" +" debug Bitmask of debug values to enable\n" +" no_reset Suppress initial bus resets\n" +" extended Enable extended geometry on all controllers\n" +" periodic_otag Send an ordered tagged transaction\n" +" periodically to prevent tag starvation.\n" +" This may be required by some older disk\n" +" or drives/RAID arrays.\n" +" tag_info:<tag_str> Set per-target tag depth\n" +" global_tag_depth:<int> Global tag depth for all targets on all buses\n" +" slewrate:<slewrate_list>Set the signal slew rate (0-15).\n" +" precomp:<pcomp_list> Set the signal precompensation (0-7).\n" +" amplitude:<int> Set the signal amplitude (0-7).\n" +" seltime:<int> Selection Timeout:\n" +" (0/256ms,1/128ms,2/64ms,3/32ms)\n" +" slowcrc Turn on the SLOWCRC bit (Rev B only)\n" +"\n" +" Sample modprobe configuration file:\n" +" # Enable verbose logging\n" +" # Set tag depth on Controller 2/Target 2 to 10 tags\n" +" # Shorten the selection timeout to 128ms\n" +"\n" +" options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n" +); + +static void ahd_linux_handle_scsi_status(struct ahd_softc *, + struct scsi_device *, + struct scb *); +static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, + struct scsi_cmnd *cmd); +static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd); +static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd); +static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd, + struct ahd_devinfo *devinfo); +static void ahd_linux_device_queue_depth(struct scsi_device *); +static int ahd_linux_run_command(struct ahd_softc*, + struct ahd_linux_device *, + struct scsi_cmnd *); +static void ahd_linux_setup_tag_info_global(char *p); +static int aic79xx_setup(char *c); +static void ahd_freeze_simq(struct ahd_softc *ahd); +static void ahd_release_simq(struct ahd_softc *ahd); + +static int ahd_linux_unit; + + +/************************** OS Utility Wrappers *******************************/ +void ahd_delay(long); +void +ahd_delay(long usec) +{ + /* + * udelay on Linux can have problems for + * multi-millisecond waits. Wait at most + * 1024us per call. + */ + while (usec > 0) { + udelay(usec % 1024); + usec -= 1024; + } +} + + +/***************************** Low Level I/O **********************************/ +uint8_t ahd_inb(struct ahd_softc * ahd, long port); +void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val); +void ahd_outw_atomic(struct ahd_softc * ahd, + long port, uint16_t val); +void ahd_outsb(struct ahd_softc * ahd, long port, + uint8_t *, int count); +void ahd_insb(struct ahd_softc * ahd, long port, + uint8_t *, int count); + +uint8_t +ahd_inb(struct ahd_softc * ahd, long port) +{ + uint8_t x; + + if (ahd->tags[0] == BUS_SPACE_MEMIO) { + x = readb(ahd->bshs[0].maddr + port); + } else { + x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF)); + } + mb(); + return (x); +} + +#if 0 /* unused */ +static uint16_t +ahd_inw_atomic(struct ahd_softc * ahd, long port) +{ + uint8_t x; + + if (ahd->tags[0] == BUS_SPACE_MEMIO) { + x = readw(ahd->bshs[0].maddr + port); + } else { + x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF)); + } + mb(); + return (x); +} +#endif + +void +ahd_outb(struct ahd_softc * ahd, long port, uint8_t val) +{ + if (ahd->tags[0] == BUS_SPACE_MEMIO) { + writeb(val, ahd->bshs[0].maddr + port); + } else { + outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF)); + } + mb(); +} + +void +ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val) +{ + if (ahd->tags[0] == BUS_SPACE_MEMIO) { + writew(val, ahd->bshs[0].maddr + port); + } else { + outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF)); + } + mb(); +} + +void +ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count) +{ + int i; + + /* + * There is probably a more efficient way to do this on Linux + * but we don't use this for anything speed critical and this + * should work. + */ + for (i = 0; i < count; i++) + ahd_outb(ahd, port, *array++); +} + +void +ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count) +{ + int i; + + /* + * There is probably a more efficient way to do this on Linux + * but we don't use this for anything speed critical and this + * should work. + */ + for (i = 0; i < count; i++) + *array++ = ahd_inb(ahd, port); +} + +/******************************* PCI Routines *********************************/ +uint32_t +ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width) +{ + switch (width) { + case 1: + { + uint8_t retval; + + pci_read_config_byte(pci, reg, &retval); + return (retval); + } + case 2: + { + uint16_t retval; + pci_read_config_word(pci, reg, &retval); + return (retval); + } + case 4: + { + uint32_t retval; + pci_read_config_dword(pci, reg, &retval); + return (retval); + } + default: + panic("ahd_pci_read_config: Read size too big"); + /* NOTREACHED */ + return (0); + } +} + +void +ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width) +{ + switch (width) { + case 1: + pci_write_config_byte(pci, reg, value); + break; + case 2: + pci_write_config_word(pci, reg, value); + break; + case 4: + pci_write_config_dword(pci, reg, value); + break; + default: + panic("ahd_pci_write_config: Write size too big"); + /* NOTREACHED */ + } +} + +/****************************** Inlines ***************************************/ +static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*); + +static void +ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb) +{ + struct scsi_cmnd *cmd; + + cmd = scb->io_ctx; + ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE); + scsi_dma_unmap(cmd); +} + +/******************************** Macros **************************************/ +#define BUILD_SCSIID(ahd, cmd) \ + (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id) + +/* + * Return a string describing the driver. + */ +static const char * +ahd_linux_info(struct Scsi_Host *host) +{ + static char buffer[512]; + char ahd_info[256]; + char *bp; + struct ahd_softc *ahd; + + bp = &buffer[0]; + ahd = *(struct ahd_softc **)host->hostdata; + memset(bp, 0, sizeof(buffer)); + strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n" + " <"); + strcat(bp, ahd->description); + strcat(bp, ">\n" + " "); + ahd_controller_info(ahd, ahd_info); + strcat(bp, ahd_info); + + return (bp); +} + +/* + * Queue an SCB to the controller. + */ +static int ahd_linux_queue_lck(struct scsi_cmnd *cmd) +{ + struct ahd_softc *ahd; + struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device); + int rtn = SCSI_MLQUEUE_HOST_BUSY; + + ahd = *(struct ahd_softc **)cmd->device->host->hostdata; + + cmd->result = CAM_REQ_INPROG << 16; + rtn = ahd_linux_run_command(ahd, dev, cmd); + + return rtn; +} + +static DEF_SCSI_QCMD(ahd_linux_queue) + +static struct scsi_target ** +ahd_linux_target_in_softc(struct scsi_target *starget) +{ + struct ahd_softc *ahd = + *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); + unsigned int target_offset; + + target_offset = starget->id; + if (starget->channel != 0) + target_offset += 8; + + return &ahd->platform_data->starget[target_offset]; +} + +static int +ahd_linux_target_alloc(struct scsi_target *starget) +{ + struct ahd_softc *ahd = + *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); + struct seeprom_config *sc = ahd->seep_config; + unsigned long flags; + struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); + struct ahd_devinfo devinfo; + struct ahd_initiator_tinfo *tinfo; + struct ahd_tmode_tstate *tstate; + char channel = starget->channel + 'A'; + + ahd_lock(ahd, &flags); + + BUG_ON(*ahd_targp != NULL); + + *ahd_targp = starget; + + if (sc) { + int flags = sc->device_flags[starget->id]; + + tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, + starget->id, &tstate); + + if ((flags & CFPACKETIZED) == 0) { + /* don't negotiate packetized (IU) transfers */ + spi_max_iu(starget) = 0; + } else { + if ((ahd->features & AHD_RTI) == 0) + spi_rti(starget) = 0; + } + + if ((flags & CFQAS) == 0) + spi_max_qas(starget) = 0; + + /* Transinfo values have been set to BIOS settings */ + spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; + spi_min_period(starget) = tinfo->user.period; + spi_max_offset(starget) = tinfo->user.offset; + } + + tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, + starget->id, &tstate); + ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id, + CAM_LUN_WILDCARD, channel, + ROLE_INITIATOR); + ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, + AHD_TRANS_GOAL, /*paused*/FALSE); + ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, + AHD_TRANS_GOAL, /*paused*/FALSE); + ahd_unlock(ahd, &flags); + + return 0; +} + +static void +ahd_linux_target_destroy(struct scsi_target *starget) +{ + struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); + + *ahd_targp = NULL; +} + +static int +ahd_linux_slave_alloc(struct scsi_device *sdev) +{ + struct ahd_softc *ahd = + *((struct ahd_softc **)sdev->host->hostdata); + struct ahd_linux_device *dev; + + if (bootverbose) + printk("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id); + + dev = scsi_transport_device_data(sdev); + memset(dev, 0, sizeof(*dev)); + + /* + * We start out life using untagged + * transactions of which we allow one. + */ + dev->openings = 1; + + /* + * Set maxtags to 0. This will be changed if we + * later determine that we are dealing with + * a tagged queuing capable device. + */ + dev->maxtags = 0; + + return (0); +} + +static int +ahd_linux_slave_configure(struct scsi_device *sdev) +{ + if (bootverbose) + sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); + + ahd_linux_device_queue_depth(sdev); + + /* Initial Domain Validation */ + if (!spi_initial_dv(sdev->sdev_target)) + spi_dv_device(sdev); + + return 0; +} + +#if defined(__i386__) +/* + * Return the disk geometry for the given SCSI device. + */ +static int +ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, + sector_t capacity, int geom[]) +{ + int heads; + int sectors; + int cylinders; + int extended; + struct ahd_softc *ahd; + + ahd = *((struct ahd_softc **)sdev->host->hostdata); + + if (scsi_partsize(bdev, capacity, geom)) + return 0; + + heads = 64; + sectors = 32; + cylinders = aic_sector_div(capacity, heads, sectors); + + if (aic79xx_extended != 0) + extended = 1; + else + extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; + if (extended && cylinders >= 1024) { + heads = 255; + sectors = 63; + cylinders = aic_sector_div(capacity, heads, sectors); + } + geom[0] = heads; + geom[1] = sectors; + geom[2] = cylinders; + return (0); +} +#endif + +/* + * Abort the current SCSI command(s). + */ +static int +ahd_linux_abort(struct scsi_cmnd *cmd) +{ + return ahd_linux_queue_abort_cmd(cmd); +} + +/* + * Attempt to send a target reset message to the device that timed out. + */ +static int +ahd_linux_dev_reset(struct scsi_cmnd *cmd) +{ + struct ahd_softc *ahd; + struct ahd_linux_device *dev; + struct scb *reset_scb; + u_int cdb_byte; + int retval = SUCCESS; + struct ahd_initiator_tinfo *tinfo; + struct ahd_tmode_tstate *tstate; + unsigned long flags; + DECLARE_COMPLETION_ONSTACK(done); + + reset_scb = NULL; + + ahd = *(struct ahd_softc **)cmd->device->host->hostdata; + + scmd_printk(KERN_INFO, cmd, + "Attempting to queue a TARGET RESET message:"); + + printk("CDB:"); + for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) + printk(" 0x%x", cmd->cmnd[cdb_byte]); + printk("\n"); + + /* + * Determine if we currently own this command. + */ + dev = scsi_transport_device_data(cmd->device); + + if (dev == NULL) { + /* + * No target device for this command exists, + * so we must not still own the command. + */ + scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); + return SUCCESS; + } + + /* + * Generate us a new SCB + */ + reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX); + if (!reset_scb) { + scmd_printk(KERN_INFO, cmd, "No SCB available\n"); + return FAILED; + } + + tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, + cmd->device->id, &tstate); + reset_scb->io_ctx = cmd; + reset_scb->platform_data->dev = dev; + reset_scb->sg_count = 0; + ahd_set_residual(reset_scb, 0); + ahd_set_sense_residual(reset_scb, 0); + reset_scb->platform_data->xfer_len = 0; + reset_scb->hscb->control = 0; + reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd); + reset_scb->hscb->lun = cmd->device->lun; + reset_scb->hscb->cdb_len = 0; + reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET; + reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE; + if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { + reset_scb->flags |= SCB_PACKETIZED; + } else { + reset_scb->hscb->control |= MK_MESSAGE; + } + dev->openings--; + dev->active++; + dev->commands_issued++; + + ahd_lock(ahd, &flags); + + LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links); + ahd_queue_scb(ahd, reset_scb); + + ahd->platform_data->eh_done = &done; + ahd_unlock(ahd, &flags); + + printk("%s: Device reset code sleeping\n", ahd_name(ahd)); + if (!wait_for_completion_timeout(&done, 5 * HZ)) { + ahd_lock(ahd, &flags); + ahd->platform_data->eh_done = NULL; + ahd_unlock(ahd, &flags); + printk("%s: Device reset timer expired (active %d)\n", + ahd_name(ahd), dev->active); + retval = FAILED; + } + printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); + + return (retval); +} + +/* + * Reset the SCSI bus. + */ +static int +ahd_linux_bus_reset(struct scsi_cmnd *cmd) +{ + struct ahd_softc *ahd; + int found; + unsigned long flags; + + ahd = *(struct ahd_softc **)cmd->device->host->hostdata; +#ifdef AHD_DEBUG + if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) + printk("%s: Bus reset called for cmd %p\n", + ahd_name(ahd), cmd); +#endif + ahd_lock(ahd, &flags); + + found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A', + /*initiate reset*/TRUE); + ahd_unlock(ahd, &flags); + + if (bootverbose) + printk("%s: SCSI bus reset delivered. " + "%d SCBs aborted.\n", ahd_name(ahd), found); + + return (SUCCESS); +} + +struct scsi_host_template aic79xx_driver_template = { + .module = THIS_MODULE, + .name = "aic79xx", + .proc_name = "aic79xx", + .show_info = ahd_linux_show_info, + .write_info = ahd_proc_write_seeprom, + .info = ahd_linux_info, + .queuecommand = ahd_linux_queue, + .eh_abort_handler = ahd_linux_abort, + .eh_device_reset_handler = ahd_linux_dev_reset, + .eh_bus_reset_handler = ahd_linux_bus_reset, +#if defined(__i386__) + .bios_param = ahd_linux_biosparam, +#endif + .can_queue = AHD_MAX_QUEUE, + .this_id = -1, + .max_sectors = 8192, + .cmd_per_lun = 2, + .slave_alloc = ahd_linux_slave_alloc, + .slave_configure = ahd_linux_slave_configure, + .target_alloc = ahd_linux_target_alloc, + .target_destroy = ahd_linux_target_destroy, +}; + +/******************************** Bus DMA *************************************/ +int +ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, + bus_size_t alignment, bus_size_t boundary, + dma_addr_t lowaddr, dma_addr_t highaddr, + bus_dma_filter_t *filter, void *filterarg, + bus_size_t maxsize, int nsegments, + bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) +{ + bus_dma_tag_t dmat; + + dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); + if (dmat == NULL) + return (ENOMEM); + + /* + * Linux is very simplistic about DMA memory. For now don't + * maintain all specification information. Once Linux supplies + * better facilities for doing these operations, or the + * needs of this particular driver change, we might need to do + * more here. + */ + dmat->alignment = alignment; + dmat->boundary = boundary; + dmat->maxsize = maxsize; + *ret_tag = dmat; + return (0); +} + +void +ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) +{ + kfree(dmat); +} + +int +ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, + int flags, bus_dmamap_t *mapp) +{ + *vaddr = dma_alloc_coherent(&ahd->dev_softc->dev, dmat->maxsize, mapp, + GFP_ATOMIC); + if (*vaddr == NULL) + return (ENOMEM); + return(0); +} + +void +ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, + void* vaddr, bus_dmamap_t map) +{ + dma_free_coherent(&ahd->dev_softc->dev, dmat->maxsize, vaddr, map); +} + +int +ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, + void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, + void *cb_arg, int flags) +{ + /* + * Assume for now that this will only be used during + * initialization and not for per-transaction buffer mapping. + */ + bus_dma_segment_t stack_sg; + + stack_sg.ds_addr = map; + stack_sg.ds_len = dmat->maxsize; + cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); + return (0); +} + +void +ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) +{ +} + +int +ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) +{ + /* Nothing to do */ + return (0); +} + +/********************* Platform Dependent Functions ***************************/ +static void +ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) +{ + + if ((instance >= 0) + && (instance < ARRAY_SIZE(aic79xx_iocell_info))) { + uint8_t *iocell_info; + + iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; + iocell_info[index] = value & 0xFFFF; + if (bootverbose) + printk("iocell[%d:%ld] = %d\n", instance, index, value); + } +} + +static void +ahd_linux_setup_tag_info_global(char *p) +{ + int tags, i, j; + + tags = simple_strtoul(p + 1, NULL, 0) & 0xff; + printk("Setting Global Tags= %d\n", tags); + + for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) { + for (j = 0; j < AHD_NUM_TARGETS; j++) { + aic79xx_tag_info[i].tag_commands[j] = tags; + } + } +} + +static void +ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) +{ + + if ((instance >= 0) && (targ >= 0) + && (instance < ARRAY_SIZE(aic79xx_tag_info)) + && (targ < AHD_NUM_TARGETS)) { + aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; + if (bootverbose) + printk("tag_info[%d:%d] = %d\n", instance, targ, value); + } +} + +static char * +ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, + void (*callback)(u_long, int, int, int32_t), + u_long callback_arg) +{ + char *tok_end; + char *tok_end2; + int i; + int instance; + int targ; + int done; + char tok_list[] = {'.', ',', '{', '}', '\0'}; + + /* All options use a ':' name/arg separator */ + if (*opt_arg != ':') + return (opt_arg); + opt_arg++; + instance = -1; + targ = -1; + done = FALSE; + /* + * Restore separator that may be in + * the middle of our option argument. + */ + tok_end = strchr(opt_arg, '\0'); + if (tok_end < end) + *tok_end = ','; + while (!done) { + switch (*opt_arg) { + case '{': + if (instance == -1) { + instance = 0; + } else { + if (depth > 1) { + if (targ == -1) + targ = 0; + } else { + printk("Malformed Option %s\n", + opt_name); + done = TRUE; + } + } + opt_arg++; + break; + case '}': + if (targ != -1) + targ = -1; + else if (instance != -1) + instance = -1; + opt_arg++; + break; + case ',': + case '.': + if (instance == -1) + done = TRUE; + else if (targ >= 0) + targ++; + else if (instance >= 0) + instance++; + opt_arg++; + break; + case '\0': + done = TRUE; + break; + default: + tok_end = end; + for (i = 0; tok_list[i]; i++) { + tok_end2 = strchr(opt_arg, tok_list[i]); + if ((tok_end2) && (tok_end2 < tok_end)) + tok_end = tok_end2; + } + callback(callback_arg, instance, targ, + simple_strtol(opt_arg, NULL, 0)); + opt_arg = tok_end; + break; + } + } + return (opt_arg); +} + +/* + * Handle Linux boot parameters. This routine allows for assigning a value + * to a parameter with a ':' between the parameter and the value. + * ie. aic79xx=stpwlev:1,extended + */ +static int +aic79xx_setup(char *s) +{ + int i, n; + char *p; + char *end; + + static const struct { + const char *name; + uint32_t *flag; + } options[] = { + { "extended", &aic79xx_extended }, + { "no_reset", &aic79xx_no_reset }, + { "verbose", &aic79xx_verbose }, + { "allow_memio", &aic79xx_allow_memio}, +#ifdef AHD_DEBUG + { "debug", &ahd_debug }, +#endif + { "periodic_otag", &aic79xx_periodic_otag }, + { "pci_parity", &aic79xx_pci_parity }, + { "seltime", &aic79xx_seltime }, + { "tag_info", NULL }, + { "global_tag_depth", NULL}, + { "slewrate", NULL }, + { "precomp", NULL }, + { "amplitude", NULL }, + { "slowcrc", &aic79xx_slowcrc }, + }; + + end = strchr(s, '\0'); + + /* + * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE + * will never be 0 in this case. + */ + n = 0; + + while ((p = strsep(&s, ",.")) != NULL) { + if (*p == '\0') + continue; + for (i = 0; i < ARRAY_SIZE(options); i++) { + + n = strlen(options[i].name); + if (strncmp(options[i].name, p, n) == 0) + break; + } + if (i == ARRAY_SIZE(options)) + continue; + + if (strncmp(p, "global_tag_depth", n) == 0) { + ahd_linux_setup_tag_info_global(p + n); + } else if (strncmp(p, "tag_info", n) == 0) { + s = ahd_parse_brace_option("tag_info", p + n, end, + 2, ahd_linux_setup_tag_info, 0); + } else if (strncmp(p, "slewrate", n) == 0) { + s = ahd_parse_brace_option("slewrate", + p + n, end, 1, ahd_linux_setup_iocell_info, + AIC79XX_SLEWRATE_INDEX); + } else if (strncmp(p, "precomp", n) == 0) { + s = ahd_parse_brace_option("precomp", + p + n, end, 1, ahd_linux_setup_iocell_info, + AIC79XX_PRECOMP_INDEX); + } else if (strncmp(p, "amplitude", n) == 0) { + s = ahd_parse_brace_option("amplitude", + p + n, end, 1, ahd_linux_setup_iocell_info, + AIC79XX_AMPLITUDE_INDEX); + } else if (p[n] == ':') { + *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); + } else if (!strncmp(p, "verbose", n)) { + *(options[i].flag) = 1; + } else { + *(options[i].flag) ^= 0xFFFFFFFF; + } + } + return 1; +} + +__setup("aic79xx=", aic79xx_setup); + +uint32_t aic79xx_verbose; + +int +ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template) +{ + char buf[80]; + struct Scsi_Host *host; + char *new_name; + u_long s; + int retval; + + template->name = ahd->description; + host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); + if (host == NULL) + return (ENOMEM); + + *((struct ahd_softc **)host->hostdata) = ahd; + ahd->platform_data->host = host; + host->can_queue = AHD_MAX_QUEUE; + host->cmd_per_lun = 2; + host->sg_tablesize = AHD_NSEG; + host->this_id = ahd->our_id; + host->irq = ahd->platform_data->irq; + host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; + host->max_lun = AHD_NUM_LUNS; + host->max_channel = 0; + host->sg_tablesize = AHD_NSEG; + ahd_lock(ahd, &s); + ahd_set_unit(ahd, ahd_linux_unit++); + ahd_unlock(ahd, &s); + sprintf(buf, "scsi%d", host->host_no); + new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); + if (new_name != NULL) { + strcpy(new_name, buf); + ahd_set_name(ahd, new_name); + } + host->unique_id = ahd->unit; + ahd_linux_initialize_scsi_bus(ahd); + ahd_intr_enable(ahd, TRUE); + + host->transportt = ahd_linux_transport_template; + + retval = scsi_add_host(host, &ahd->dev_softc->dev); + if (retval) { + printk(KERN_WARNING "aic79xx: scsi_add_host failed\n"); + scsi_host_put(host); + return retval; + } + + scsi_scan_host(host); + return 0; +} + +/* + * Place the SCSI bus into a known state by either resetting it, + * or forcing transfer negotiations on the next command to any + * target. + */ +static void +ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) +{ + u_int target_id; + u_int numtarg; + unsigned long s; + + target_id = 0; + numtarg = 0; + + if (aic79xx_no_reset != 0) + ahd->flags &= ~AHD_RESET_BUS_A; + + if ((ahd->flags & AHD_RESET_BUS_A) != 0) + ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); + else + numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; + + ahd_lock(ahd, &s); + + /* + * Force negotiation to async for all targets that + * will not see an initial bus reset. + */ + for (; target_id < numtarg; target_id++) { + struct ahd_devinfo devinfo; + struct ahd_initiator_tinfo *tinfo; + struct ahd_tmode_tstate *tstate; + + tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, + target_id, &tstate); + ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, + CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); + ahd_update_neg_request(ahd, &devinfo, tstate, + tinfo, AHD_NEG_ALWAYS); + } + ahd_unlock(ahd, &s); + /* Give the bus some time to recover */ + if ((ahd->flags & AHD_RESET_BUS_A) != 0) { + ahd_freeze_simq(ahd); + msleep(AIC79XX_RESET_DELAY); + ahd_release_simq(ahd); + } +} + +int +ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) +{ + ahd->platform_data = + kzalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC); + if (ahd->platform_data == NULL) + return (ENOMEM); + ahd->platform_data->irq = AHD_LINUX_NOIRQ; + ahd_lockinit(ahd); + ahd->seltime = (aic79xx_seltime & 0x3) << 4; + return (0); +} + +void +ahd_platform_free(struct ahd_softc *ahd) +{ + struct scsi_target *starget; + int i; + + if (ahd->platform_data != NULL) { + /* destroy all of the device and target objects */ + for (i = 0; i < AHD_NUM_TARGETS; i++) { + starget = ahd->platform_data->starget[i]; + if (starget != NULL) { + ahd->platform_data->starget[i] = NULL; + } + } + + if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) + free_irq(ahd->platform_data->irq, ahd); + if (ahd->tags[0] == BUS_SPACE_PIO + && ahd->bshs[0].ioport != 0) + release_region(ahd->bshs[0].ioport, 256); + if (ahd->tags[1] == BUS_SPACE_PIO + && ahd->bshs[1].ioport != 0) + release_region(ahd->bshs[1].ioport, 256); + if (ahd->tags[0] == BUS_SPACE_MEMIO + && ahd->bshs[0].maddr != NULL) { + iounmap(ahd->bshs[0].maddr); + release_mem_region(ahd->platform_data->mem_busaddr, + 0x1000); + } + if (ahd->platform_data->host) + scsi_host_put(ahd->platform_data->host); + + kfree(ahd->platform_data); + } +} + +void +ahd_platform_init(struct ahd_softc *ahd) +{ + /* + * Lookup and commit any modified IO Cell options. + */ + if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { + const struct ahd_linux_iocell_opts *iocell_opts; + + iocell_opts = &aic79xx_iocell_info[ahd->unit]; + if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) + AHD_SET_PRECOMP(ahd, iocell_opts->precomp); + if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) + AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); + if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) + AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); + } + +} + +void +ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) +{ + ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), + SCB_GET_CHANNEL(ahd, scb), + SCB_GET_LUN(scb), SCB_LIST_NULL, + ROLE_UNKNOWN, CAM_REQUEUE_REQ); +} + +void +ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev, + struct ahd_devinfo *devinfo, ahd_queue_alg alg) +{ + struct ahd_linux_device *dev; + int was_queuing; + int now_queuing; + + if (sdev == NULL) + return; + + dev = scsi_transport_device_data(sdev); + + if (dev == NULL) + return; + was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); + switch (alg) { + default: + case AHD_QUEUE_NONE: + now_queuing = 0; + break; + case AHD_QUEUE_BASIC: + now_queuing = AHD_DEV_Q_BASIC; + break; + case AHD_QUEUE_TAGGED: + now_queuing = AHD_DEV_Q_TAGGED; + break; + } + if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 + && (was_queuing != now_queuing) + && (dev->active != 0)) { + dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; + dev->qfrozen++; + } + + dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); + if (now_queuing) { + u_int usertags; + + usertags = ahd_linux_user_tagdepth(ahd, devinfo); + if (!was_queuing) { + /* + * Start out aggressively and allow our + * dynamic queue depth algorithm to take + * care of the rest. + */ + dev->maxtags = usertags; + dev->openings = dev->maxtags - dev->active; + } + if (dev->maxtags == 0) { + /* + * Queueing is disabled by the user. + */ + dev->openings = 1; + } else if (alg == AHD_QUEUE_TAGGED) { + dev->flags |= AHD_DEV_Q_TAGGED; + if (aic79xx_periodic_otag != 0) + dev->flags |= AHD_DEV_PERIODIC_OTAG; + } else + dev->flags |= AHD_DEV_Q_BASIC; + } else { + /* We can only have one opening. */ + dev->maxtags = 0; + dev->openings = 1 - dev->active; + } + + switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { + case AHD_DEV_Q_BASIC: + case AHD_DEV_Q_TAGGED: + scsi_change_queue_depth(sdev, + dev->openings + dev->active); + break; + default: + /* + * We allow the OS to queue 2 untagged transactions to + * us at any time even though we can only execute them + * serially on the controller/device. This should + * remove some latency. + */ + scsi_change_queue_depth(sdev, 1); + break; + } +} + +int +ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, + int lun, u_int tag, role_t role, uint32_t status) +{ + return 0; +} + +static u_int +ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) +{ + static int warned_user; + u_int tags; + + tags = 0; + if ((ahd->user_discenable & devinfo->target_mask) != 0) { + if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) { + + if (warned_user == 0) { + printk(KERN_WARNING +"aic79xx: WARNING: Insufficient tag_info instances\n" +"aic79xx: for installed controllers. Using defaults\n" +"aic79xx: Please update the aic79xx_tag_info array in\n" +"aic79xx: the aic79xx_osm.c source file.\n"); + warned_user++; + } + tags = AHD_MAX_QUEUE; + } else { + adapter_tag_info_t *tag_info; + + tag_info = &aic79xx_tag_info[ahd->unit]; + tags = tag_info->tag_commands[devinfo->target_offset]; + if (tags > AHD_MAX_QUEUE) + tags = AHD_MAX_QUEUE; + } + } + return (tags); +} + +/* + * Determines the queue depth for a given device. + */ +static void +ahd_linux_device_queue_depth(struct scsi_device *sdev) +{ + struct ahd_devinfo devinfo; + u_int tags; + struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata); + + ahd_compile_devinfo(&devinfo, + ahd->our_id, + sdev->sdev_target->id, sdev->lun, + sdev->sdev_target->channel == 0 ? 'A' : 'B', + ROLE_INITIATOR); + tags = ahd_linux_user_tagdepth(ahd, &devinfo); + if (tags != 0 && sdev->tagged_supported != 0) { + + ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED); + ahd_send_async(ahd, devinfo.channel, devinfo.target, + devinfo.lun, AC_TRANSFER_NEG); + ahd_print_devinfo(ahd, &devinfo); + printk("Tagged Queuing enabled. Depth %d\n", tags); + } else { + ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE); + ahd_send_async(ahd, devinfo.channel, devinfo.target, + devinfo.lun, AC_TRANSFER_NEG); + } +} + +static int +ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, + struct scsi_cmnd *cmd) +{ + struct scb *scb; + struct hardware_scb *hscb; + struct ahd_initiator_tinfo *tinfo; + struct ahd_tmode_tstate *tstate; + u_int col_idx; + uint16_t mask; + unsigned long flags; + int nseg; + + nseg = scsi_dma_map(cmd); + if (nseg < 0) + return SCSI_MLQUEUE_HOST_BUSY; + + ahd_lock(ahd, &flags); + + /* + * Get an scb to use. + */ + tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, + cmd->device->id, &tstate); + if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 + || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { + col_idx = AHD_NEVER_COL_IDX; + } else { + col_idx = AHD_BUILD_COL_IDX(cmd->device->id, + cmd->device->lun); + } + if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { + ahd->flags |= AHD_RESOURCE_SHORTAGE; + ahd_unlock(ahd, &flags); + scsi_dma_unmap(cmd); + return SCSI_MLQUEUE_HOST_BUSY; + } + + scb->io_ctx = cmd; + scb->platform_data->dev = dev; + hscb = scb->hscb; + cmd->host_scribble = (char *)scb; + + /* + * Fill out basics of the HSCB. + */ + hscb->control = 0; + hscb->scsiid = BUILD_SCSIID(ahd, cmd); + hscb->lun = cmd->device->lun; + scb->hscb->task_management = 0; + mask = SCB_GET_TARGET_MASK(ahd, scb); + + if ((ahd->user_discenable & mask) != 0) + hscb->control |= DISCENB; + + if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) + scb->flags |= SCB_PACKETIZED; + + if ((tstate->auto_negotiate & mask) != 0) { + scb->flags |= SCB_AUTO_NEGOTIATE; + scb->hscb->control |= MK_MESSAGE; + } + + if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { + if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH + && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { + hscb->control |= ORDERED_QUEUE_TAG; + dev->commands_since_idle_or_otag = 0; + } else { + hscb->control |= SIMPLE_QUEUE_TAG; + } + } + + hscb->cdb_len = cmd->cmd_len; + memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); + + scb->platform_data->xfer_len = 0; + ahd_set_residual(scb, 0); + ahd_set_sense_residual(scb, 0); + scb->sg_count = 0; + + if (nseg > 0) { + void *sg = scb->sg_list; + struct scatterlist *cur_seg; + int i; + + scb->platform_data->xfer_len = 0; + + scsi_for_each_sg(cmd, cur_seg, nseg, i) { + dma_addr_t addr; + bus_size_t len; + + addr = sg_dma_address(cur_seg); + len = sg_dma_len(cur_seg); + scb->platform_data->xfer_len += len; + sg = ahd_sg_setup(ahd, scb, sg, addr, len, + i == (nseg - 1)); + } + } + + LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); + dev->openings--; + dev->active++; + dev->commands_issued++; + + if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) + dev->commands_since_idle_or_otag++; + scb->flags |= SCB_ACTIVE; + ahd_queue_scb(ahd, scb); + + ahd_unlock(ahd, &flags); + + return 0; +} + +/* + * SCSI controller interrupt handler. + */ +irqreturn_t +ahd_linux_isr(int irq, void *dev_id) +{ + struct ahd_softc *ahd; + u_long flags; + int ours; + + ahd = (struct ahd_softc *) dev_id; + ahd_lock(ahd, &flags); + ours = ahd_intr(ahd); + ahd_unlock(ahd, &flags); + return IRQ_RETVAL(ours); +} + +void +ahd_send_async(struct ahd_softc *ahd, char channel, + u_int target, u_int lun, ac_code code) +{ + switch (code) { + case AC_TRANSFER_NEG: + { + struct scsi_target *starget; + struct ahd_initiator_tinfo *tinfo; + struct ahd_tmode_tstate *tstate; + unsigned int target_ppr_options; + + BUG_ON(target == CAM_TARGET_WILDCARD); + + tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, + target, &tstate); + + /* + * Don't bother reporting results while + * negotiations are still pending. + */ + if (tinfo->curr.period != tinfo->goal.period + || tinfo->curr.width != tinfo->goal.width + || tinfo->curr.offset != tinfo->goal.offset + || tinfo->curr.ppr_options != tinfo->goal.ppr_options) + if (bootverbose == 0) + break; + + /* + * Don't bother reporting results that + * are identical to those last reported. + */ + starget = ahd->platform_data->starget[target]; + if (starget == NULL) + break; + + target_ppr_options = + (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) + + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) + + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) + + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) + + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) + + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) + + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) + + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); + + if (tinfo->curr.period == spi_period(starget) + && tinfo->curr.width == spi_width(starget) + && tinfo->curr.offset == spi_offset(starget) + && tinfo->curr.ppr_options == target_ppr_options) + if (bootverbose == 0) + break; + + spi_period(starget) = tinfo->curr.period; + spi_width(starget) = tinfo->curr.width; + spi_offset(starget) = tinfo->curr.offset; + spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; + spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; + spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; + spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; + spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; + spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; + spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; + spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; + spi_display_xfer_agreement(starget); + break; + } + case AC_SENT_BDR: + { + WARN_ON(lun != CAM_LUN_WILDCARD); + scsi_report_device_reset(ahd->platform_data->host, + channel - 'A', target); + break; + } + case AC_BUS_RESET: + if (ahd->platform_data->host != NULL) { + scsi_report_bus_reset(ahd->platform_data->host, + channel - 'A'); + } + break; + default: + panic("ahd_send_async: Unexpected async event"); + } +} + +/* + * Calls the higher level scsi done function and frees the scb. + */ +void +ahd_done(struct ahd_softc *ahd, struct scb *scb) +{ + struct scsi_cmnd *cmd; + struct ahd_linux_device *dev; + + if ((scb->flags & SCB_ACTIVE) == 0) { + printk("SCB %d done'd twice\n", SCB_GET_TAG(scb)); + ahd_dump_card_state(ahd); + panic("Stopping for safety"); + } + LIST_REMOVE(scb, pending_links); + cmd = scb->io_ctx; + dev = scb->platform_data->dev; + dev->active--; + dev->openings++; + if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { + cmd->result &= ~(CAM_DEV_QFRZN << 16); + dev->qfrozen--; + } + ahd_linux_unmap_scb(ahd, scb); + + /* + * Guard against stale sense data. + * The Linux mid-layer assumes that sense + * was retrieved anytime the first byte of + * the sense buffer looks "sane". + */ + cmd->sense_buffer[0] = 0; + if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { +#ifdef AHD_REPORT_UNDERFLOWS + uint32_t amount_xferred; + + amount_xferred = + ahd_get_transfer_length(scb) - ahd_get_residual(scb); +#endif + if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { +#ifdef AHD_DEBUG + if ((ahd_debug & AHD_SHOW_MISC) != 0) { + ahd_print_path(ahd, scb); + printk("Set CAM_UNCOR_PARITY\n"); + } +#endif + ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); +#ifdef AHD_REPORT_UNDERFLOWS + /* + * This code is disabled by default as some + * clients of the SCSI system do not properly + * initialize the underflow parameter. This + * results in spurious termination of commands + * that complete as expected (e.g. underflow is + * allowed as command can return variable amounts + * of data. + */ + } else if (amount_xferred < scb->io_ctx->underflow) { + u_int i; + + ahd_print_path(ahd, scb); + printk("CDB:"); + for (i = 0; i < scb->io_ctx->cmd_len; i++) + printk(" 0x%x", scb->io_ctx->cmnd[i]); + printk("\n"); + ahd_print_path(ahd, scb); + printk("Saw underflow (%ld of %ld bytes). " + "Treated as error\n", + ahd_get_residual(scb), + ahd_get_transfer_length(scb)); + ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); +#endif + } else { + ahd_set_transaction_status(scb, CAM_REQ_CMP); + } + } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { + ahd_linux_handle_scsi_status(ahd, cmd->device, scb); + } + + if (dev->openings == 1 + && ahd_get_transaction_status(scb) == CAM_REQ_CMP + && ahd_get_scsi_status(scb) != SAM_STAT_TASK_SET_FULL) + dev->tag_success_count++; + /* + * Some devices deal with temporary internal resource + * shortages by returning queue full. When the queue + * full occurrs, we throttle back. Slowly try to get + * back to our previous queue depth. + */ + if ((dev->openings + dev->active) < dev->maxtags + && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { + dev->tag_success_count = 0; + dev->openings++; + } + + if (dev->active == 0) + dev->commands_since_idle_or_otag = 0; + + if ((scb->flags & SCB_RECOVERY_SCB) != 0) { + printk("Recovery SCB completes\n"); + if (ahd_get_transaction_status(scb) == CAM_BDR_SENT + || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) + ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); + + if (ahd->platform_data->eh_done) + complete(ahd->platform_data->eh_done); + } + + ahd_free_scb(ahd, scb); + ahd_linux_queue_cmd_complete(ahd, cmd); +} + +static void +ahd_linux_handle_scsi_status(struct ahd_softc *ahd, + struct scsi_device *sdev, struct scb *scb) +{ + struct ahd_devinfo devinfo; + struct ahd_linux_device *dev = scsi_transport_device_data(sdev); + + ahd_compile_devinfo(&devinfo, + ahd->our_id, + sdev->sdev_target->id, sdev->lun, + sdev->sdev_target->channel == 0 ? 'A' : 'B', + ROLE_INITIATOR); + + /* + * We don't currently trust the mid-layer to + * properly deal with queue full or busy. So, + * when one occurs, we tell the mid-layer to + * unconditionally requeue the command to us + * so that we can retry it ourselves. We also + * implement our own throttling mechanism so + * we don't clobber the device with too many + * commands. + */ + switch (ahd_get_scsi_status(scb)) { + default: + break; + case SAM_STAT_CHECK_CONDITION: + case SAM_STAT_COMMAND_TERMINATED: + { + struct scsi_cmnd *cmd; + + /* + * Copy sense information to the OS's cmd + * structure if it is available. + */ + cmd = scb->io_ctx; + if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { + struct scsi_status_iu_header *siu; + u_int sense_size; + u_int sense_offset; + + if (scb->flags & SCB_SENSE) { + sense_size = min(sizeof(struct scsi_sense_data) + - ahd_get_sense_residual(scb), + (u_long)SCSI_SENSE_BUFFERSIZE); + sense_offset = 0; + } else { + /* + * Copy only the sense data into the provided + * buffer. + */ + siu = (struct scsi_status_iu_header *) + scb->sense_data; + sense_size = min_t(size_t, + scsi_4btoul(siu->sense_length), + SCSI_SENSE_BUFFERSIZE); + sense_offset = SIU_SENSE_OFFSET(siu); + } + + memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); + memcpy(cmd->sense_buffer, + ahd_get_sense_buf(ahd, scb) + + sense_offset, sense_size); + set_status_byte(cmd, SAM_STAT_CHECK_CONDITION); + +#ifdef AHD_DEBUG + if (ahd_debug & AHD_SHOW_SENSE) { + int i; + + printk("Copied %d bytes of sense data at %d:", + sense_size, sense_offset); + for (i = 0; i < sense_size; i++) { + if ((i & 0xF) == 0) + printk("\n"); + printk("0x%x ", cmd->sense_buffer[i]); + } + printk("\n"); + } +#endif + } + break; + } + case SAM_STAT_TASK_SET_FULL: + /* + * By the time the core driver has returned this + * command, all other commands that were queued + * to us but not the device have been returned. + * This ensures that dev->active is equal to + * the number of commands actually queued to + * the device. + */ + dev->tag_success_count = 0; + if (dev->active != 0) { + /* + * Drop our opening count to the number + * of commands currently outstanding. + */ + dev->openings = 0; +#ifdef AHD_DEBUG + if ((ahd_debug & AHD_SHOW_QFULL) != 0) { + ahd_print_path(ahd, scb); + printk("Dropping tag count to %d\n", + dev->active); + } +#endif + if (dev->active == dev->tags_on_last_queuefull) { + + dev->last_queuefull_same_count++; + /* + * If we repeatedly see a queue full + * at the same queue depth, this + * device has a fixed number of tag + * slots. Lock in this tag depth + * so we stop seeing queue fulls from + * this device. + */ + if (dev->last_queuefull_same_count + == AHD_LOCK_TAGS_COUNT) { + dev->maxtags = dev->active; + ahd_print_path(ahd, scb); + printk("Locking max tag count at %d\n", + dev->active); + } + } else { + dev->tags_on_last_queuefull = dev->active; + dev->last_queuefull_same_count = 0; + } + ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); + ahd_set_scsi_status(scb, SAM_STAT_GOOD); + ahd_platform_set_tags(ahd, sdev, &devinfo, + (dev->flags & AHD_DEV_Q_BASIC) + ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); + break; + } + /* + * Drop down to a single opening, and treat this + * as if the target returned BUSY SCSI status. + */ + dev->openings = 1; + ahd_platform_set_tags(ahd, sdev, &devinfo, + (dev->flags & AHD_DEV_Q_BASIC) + ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); + ahd_set_scsi_status(scb, SAM_STAT_BUSY); + } +} + +static void +ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) +{ + int status; + int new_status = DID_OK; + int do_fallback = 0; + int scsi_status; + struct scsi_sense_data *sense; + + /* + * Map CAM error codes into Linux Error codes. We + * avoid the conversion so that the DV code has the + * full error information available when making + * state change decisions. + */ + + status = ahd_cmd_get_transaction_status(cmd); + switch (status) { + case CAM_REQ_INPROG: + case CAM_REQ_CMP: + new_status = DID_OK; + break; + case CAM_AUTOSENSE_FAIL: + new_status = DID_ERROR; + fallthrough; + case CAM_SCSI_STATUS_ERROR: + scsi_status = ahd_cmd_get_scsi_status(cmd); + + switch(scsi_status) { + case SAM_STAT_COMMAND_TERMINATED: + case SAM_STAT_CHECK_CONDITION: + sense = (struct scsi_sense_data *) + cmd->sense_buffer; + if (sense->extra_len >= 5 && + (sense->add_sense_code == 0x47 + || sense->add_sense_code == 0x48)) + do_fallback = 1; + break; + default: + break; + } + break; + case CAM_REQ_ABORTED: + new_status = DID_ABORT; + break; + case CAM_BUSY: + new_status = DID_BUS_BUSY; + break; + case CAM_REQ_INVALID: + case CAM_PATH_INVALID: + new_status = DID_BAD_TARGET; + break; + case CAM_SEL_TIMEOUT: + new_status = DID_NO_CONNECT; + break; + case CAM_SCSI_BUS_RESET: + case CAM_BDR_SENT: + new_status = DID_RESET; + break; + case CAM_UNCOR_PARITY: + new_status = DID_PARITY; + do_fallback = 1; + break; + case CAM_CMD_TIMEOUT: + new_status = DID_TIME_OUT; + do_fallback = 1; + break; + case CAM_REQ_CMP_ERR: + case CAM_UNEXP_BUSFREE: + case CAM_DATA_RUN_ERR: + new_status = DID_ERROR; + do_fallback = 1; + break; + case CAM_UA_ABORT: + case CAM_NO_HBA: + case CAM_SEQUENCE_FAIL: + case CAM_CCB_LEN_ERR: + case CAM_PROVIDE_FAIL: + case CAM_REQ_TERMIO: + case CAM_UNREC_HBA_ERROR: + case CAM_REQ_TOO_BIG: + new_status = DID_ERROR; + break; + case CAM_REQUEUE_REQ: + new_status = DID_REQUEUE; + break; + default: + /* We should never get here */ + new_status = DID_ERROR; + break; + } + + if (do_fallback) { + printk("%s: device overrun (status %x) on %d:%d:%d\n", + ahd_name(ahd), status, cmd->device->channel, + cmd->device->id, (u8)cmd->device->lun); + } + + ahd_cmd_set_transaction_status(cmd, new_status); + + scsi_done(cmd); +} + +static void +ahd_freeze_simq(struct ahd_softc *ahd) +{ + scsi_block_requests(ahd->platform_data->host); +} + +static void +ahd_release_simq(struct ahd_softc *ahd) +{ + scsi_unblock_requests(ahd->platform_data->host); +} + +static int +ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd) +{ + struct ahd_softc *ahd; + struct ahd_linux_device *dev; + struct scb *pending_scb; + u_int saved_scbptr; + u_int active_scbptr; + u_int last_phase; + u_int cdb_byte; + int retval = SUCCESS; + int was_paused; + int paused; + int wait; + int disconnected; + ahd_mode_state saved_modes; + unsigned long flags; + + pending_scb = NULL; + paused = FALSE; + wait = FALSE; + ahd = *(struct ahd_softc **)cmd->device->host->hostdata; + + scmd_printk(KERN_INFO, cmd, + "Attempting to queue an ABORT message:"); + + printk("CDB:"); + for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) + printk(" 0x%x", cmd->cmnd[cdb_byte]); + printk("\n"); + + ahd_lock(ahd, &flags); + + /* + * First determine if we currently own this command. + * Start by searching the device queue. If not found + * there, check the pending_scb list. If not found + * at all, and the system wanted us to just abort the + * command, return success. + */ + dev = scsi_transport_device_data(cmd->device); + + if (dev == NULL) { + /* + * No target device for this command exists, + * so we must not still own the command. + */ + scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); + goto done; + } + + /* + * See if we can find a matching cmd in the pending list. + */ + LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { + if (pending_scb->io_ctx == cmd) + break; + } + + if (pending_scb == NULL) { + scmd_printk(KERN_INFO, cmd, "Command not found\n"); + goto done; + } + + if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { + /* + * We can't queue two recovery actions using the same SCB + */ + retval = FAILED; + goto done; + } + + /* + * Ensure that the card doesn't do anything + * behind our back. Also make sure that we + * didn't "just" miss an interrupt that would + * affect this cmd. + */ + was_paused = ahd_is_paused(ahd); + ahd_pause_and_flushwork(ahd); + paused = TRUE; + + if ((pending_scb->flags & SCB_ACTIVE) == 0) { + scmd_printk(KERN_INFO, cmd, "Command already completed\n"); + goto done; + } + + printk("%s: At time of recovery, card was %spaused\n", + ahd_name(ahd), was_paused ? "" : "not "); + ahd_dump_card_state(ahd); + + disconnected = TRUE; + if (ahd_search_qinfifo(ahd, cmd->device->id, + cmd->device->channel + 'A', + cmd->device->lun, + pending_scb->hscb->tag, + ROLE_INITIATOR, CAM_REQ_ABORTED, + SEARCH_COMPLETE) > 0) { + printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", + ahd_name(ahd), cmd->device->channel, + cmd->device->id, (u8)cmd->device->lun); + goto done; + } + + saved_modes = ahd_save_modes(ahd); + ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); + last_phase = ahd_inb(ahd, LASTPHASE); + saved_scbptr = ahd_get_scbptr(ahd); + active_scbptr = saved_scbptr; + if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { + struct scb *bus_scb; + + bus_scb = ahd_lookup_scb(ahd, active_scbptr); + if (bus_scb == pending_scb) + disconnected = FALSE; + } + + /* + * At this point, pending_scb is the scb associated with the + * passed in command. That command is currently active on the + * bus or is in the disconnected state. + */ + ahd_inb(ahd, SAVED_SCSIID); + if (last_phase != P_BUSFREE + && SCB_GET_TAG(pending_scb) == active_scbptr) { + + /* + * We're active on the bus, so assert ATN + * and hope that the target responds. + */ + pending_scb = ahd_lookup_scb(ahd, active_scbptr); + pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; + ahd_outb(ahd, MSG_OUT, HOST_MSG); + ahd_outb(ahd, SCSISIGO, last_phase|ATNO); + scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); + wait = TRUE; + } else if (disconnected) { + + /* + * Actually re-queue this SCB in an attempt + * to select the device before it reconnects. + */ + pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; + ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); + pending_scb->hscb->cdb_len = 0; + pending_scb->hscb->task_attribute = 0; + pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; + + if ((pending_scb->flags & SCB_PACKETIZED) != 0) { + /* + * Mark the SCB has having an outstanding + * task management function. Should the command + * complete normally before the task management + * function can be sent, the host will be notified + * to abort our requeued SCB. + */ + ahd_outb(ahd, SCB_TASK_MANAGEMENT, + pending_scb->hscb->task_management); + } else { + /* + * If non-packetized, set the MK_MESSAGE control + * bit indicating that we desire to send a message. + * We also set the disconnected flag since there is + * no guarantee that our SCB control byte matches + * the version on the card. We don't want the + * sequencer to abort the command thinking an + * unsolicited reselection occurred. + */ + pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; + + /* + * The sequencer will never re-reference the + * in-core SCB. To make sure we are notified + * during reselection, set the MK_MESSAGE flag in + * the card's copy of the SCB. + */ + ahd_outb(ahd, SCB_CONTROL, + ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); + } + + /* + * Clear out any entries in the QINFIFO first + * so we are the next SCB for this target + * to run. + */ + ahd_search_qinfifo(ahd, cmd->device->id, + cmd->device->channel + 'A', cmd->device->lun, + SCB_LIST_NULL, ROLE_INITIATOR, + CAM_REQUEUE_REQ, SEARCH_COMPLETE); + ahd_qinfifo_requeue_tail(ahd, pending_scb); + ahd_set_scbptr(ahd, saved_scbptr); + ahd_print_path(ahd, pending_scb); + printk("Device is disconnected, re-queuing SCB\n"); + wait = TRUE; + } else { + scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); + retval = FAILED; + } + + + ahd_restore_modes(ahd, saved_modes); +done: + if (paused) + ahd_unpause(ahd); + if (wait) { + DECLARE_COMPLETION_ONSTACK(done); + + ahd->platform_data->eh_done = &done; + ahd_unlock(ahd, &flags); + + printk("%s: Recovery code sleeping\n", ahd_name(ahd)); + if (!wait_for_completion_timeout(&done, 5 * HZ)) { + ahd_lock(ahd, &flags); + ahd->platform_data->eh_done = NULL; + ahd_unlock(ahd, &flags); + printk("%s: Timer Expired (active %d)\n", + ahd_name(ahd), dev->active); + retval = FAILED; + } + printk("Recovery code awake\n"); + } else + ahd_unlock(ahd, &flags); + + if (retval != SUCCESS) + printk("%s: Command abort returning 0x%x\n", + ahd_name(ahd), retval); + + return retval; +} + +static void ahd_linux_set_width(struct scsi_target *starget, int width) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); + struct ahd_devinfo devinfo; + unsigned long flags; + + ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, + starget->channel + 'A', ROLE_INITIATOR); + ahd_lock(ahd, &flags); + ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); + ahd_unlock(ahd, &flags); +} + +static void ahd_linux_set_period(struct scsi_target *starget, int period) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); + struct ahd_tmode_tstate *tstate; + struct ahd_initiator_tinfo *tinfo + = ahd_fetch_transinfo(ahd, + starget->channel + 'A', + shost->this_id, starget->id, &tstate); + struct ahd_devinfo devinfo; + unsigned int ppr_options = tinfo->goal.ppr_options; + unsigned int dt; + unsigned long flags; + unsigned long offset = tinfo->goal.offset; + +#ifdef AHD_DEBUG + if ((ahd_debug & AHD_SHOW_DV) != 0) + printk("%s: set period to %d\n", ahd_name(ahd), period); +#endif + if (offset == 0) + offset = MAX_OFFSET; + + if (period < 8) + period = 8; + if (period < 10) { + if (spi_max_width(starget)) { + ppr_options |= MSG_EXT_PPR_DT_REQ; + if (period == 8) + ppr_options |= MSG_EXT_PPR_IU_REQ; + } else + period = 10; + } + + dt = ppr_options & MSG_EXT_PPR_DT_REQ; + + ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, + starget->channel + 'A', ROLE_INITIATOR); + + /* all PPR requests apart from QAS require wide transfers */ + if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { + if (spi_width(starget) == 0) + ppr_options &= MSG_EXT_PPR_QAS_REQ; + } + + ahd_find_syncrate(ahd, &period, &ppr_options, + dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); + + ahd_lock(ahd, &flags); + ahd_set_syncrate(ahd, &devinfo, period, offset, + ppr_options, AHD_TRANS_GOAL, FALSE); + ahd_unlock(ahd, &flags); +} + +static void ahd_linux_set_offset(struct scsi_target *starget, int offset) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); + struct ahd_tmode_tstate *tstate; + struct ahd_initiator_tinfo *tinfo + = ahd_fetch_transinfo(ahd, + starget->channel + 'A', + shost->this_id, starget->id, &tstate); + struct ahd_devinfo devinfo; + unsigned int ppr_options = 0; + unsigned int period = 0; + unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; + unsigned long flags; + +#ifdef AHD_DEBUG + if ((ahd_debug & AHD_SHOW_DV) != 0) + printk("%s: set offset to %d\n", ahd_name(ahd), offset); +#endif + + ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, + starget->channel + 'A', ROLE_INITIATOR); + if (offset != 0) { + period = tinfo->goal.period; + ppr_options = tinfo->goal.ppr_options; + ahd_find_syncrate(ahd, &period, &ppr_options, + dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); + } + + ahd_lock(ahd, &flags); + ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, + AHD_TRANS_GOAL, FALSE); + ahd_unlock(ahd, &flags); +} + +static void ahd_linux_set_dt(struct scsi_target *starget, int dt) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); + struct ahd_tmode_tstate *tstate; + struct ahd_initiator_tinfo *tinfo + = ahd_fetch_transinfo(ahd, + starget->channel + 'A', + shost->this_id, starget->id, &tstate); + struct ahd_devinfo devinfo; + unsigned int ppr_options = tinfo->goal.ppr_options + & ~MSG_EXT_PPR_DT_REQ; + unsigned int period = tinfo->goal.period; + unsigned int width = tinfo->goal.width; + unsigned long flags; + +#ifdef AHD_DEBUG + if ((ahd_debug & AHD_SHOW_DV) != 0) + printk("%s: %s DT\n", ahd_name(ahd), + dt ? "enabling" : "disabling"); +#endif + if (dt && spi_max_width(starget)) { + ppr_options |= MSG_EXT_PPR_DT_REQ; + if (!width) + ahd_linux_set_width(starget, 1); + } else { + if (period <= 9) + period = 10; /* If resetting DT, period must be >= 25ns */ + /* IU is invalid without DT set */ + ppr_options &= ~MSG_EXT_PPR_IU_REQ; + } + ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, + starget->channel + 'A', ROLE_INITIATOR); + ahd_find_syncrate(ahd, &period, &ppr_options, + dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); + + ahd_lock(ahd, &flags); + ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, + ppr_options, AHD_TRANS_GOAL, FALSE); + ahd_unlock(ahd, &flags); +} + +static void ahd_linux_set_qas(struct scsi_target *starget, int qas) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); + struct ahd_tmode_tstate *tstate; + struct ahd_initiator_tinfo *tinfo + = ahd_fetch_transinfo(ahd, + starget->channel + 'A', + shost->this_id, starget->id, &tstate); + struct ahd_devinfo devinfo; + unsigned int ppr_options = tinfo->goal.ppr_options + & ~MSG_EXT_PPR_QAS_REQ; + unsigned int period = tinfo->goal.period; + unsigned int dt; + unsigned long flags; + +#ifdef AHD_DEBUG + if ((ahd_debug & AHD_SHOW_DV) != 0) + printk("%s: %s QAS\n", ahd_name(ahd), + qas ? "enabling" : "disabling"); +#endif + + if (qas) { + ppr_options |= MSG_EXT_PPR_QAS_REQ; + } + + dt = ppr_options & MSG_EXT_PPR_DT_REQ; + + ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, + starget->channel + 'A', ROLE_INITIATOR); + ahd_find_syncrate(ahd, &period, &ppr_options, + dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); + + ahd_lock(ahd, &flags); + ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, + ppr_options, AHD_TRANS_GOAL, FALSE); + ahd_unlock(ahd, &flags); +} + +static void ahd_linux_set_iu(struct scsi_target *starget, int iu) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); + struct ahd_tmode_tstate *tstate; + struct ahd_initiator_tinfo *tinfo + = ahd_fetch_transinfo(ahd, + starget->channel + 'A', + shost->this_id, starget->id, &tstate); + struct ahd_devinfo devinfo; + unsigned int ppr_options = tinfo->goal.ppr_options + & ~MSG_EXT_PPR_IU_REQ; + unsigned int period = tinfo->goal.period; + unsigned int dt; + unsigned long flags; + +#ifdef AHD_DEBUG + if ((ahd_debug & AHD_SHOW_DV) != 0) + printk("%s: %s IU\n", ahd_name(ahd), + iu ? "enabling" : "disabling"); +#endif + + if (iu && spi_max_width(starget)) { + ppr_options |= MSG_EXT_PPR_IU_REQ; + ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ + } + + dt = ppr_options & MSG_EXT_PPR_DT_REQ; + + ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, + starget->channel + 'A', ROLE_INITIATOR); + ahd_find_syncrate(ahd, &period, &ppr_options, + dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); + + ahd_lock(ahd, &flags); + ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, + ppr_options, AHD_TRANS_GOAL, FALSE); + ahd_unlock(ahd, &flags); +} + +static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); + struct ahd_tmode_tstate *tstate; + struct ahd_initiator_tinfo *tinfo + = ahd_fetch_transinfo(ahd, + starget->channel + 'A', + shost->this_id, starget->id, &tstate); + struct ahd_devinfo devinfo; + unsigned int ppr_options = tinfo->goal.ppr_options + & ~MSG_EXT_PPR_RD_STRM; + unsigned int period = tinfo->goal.period; + unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; + unsigned long flags; + +#ifdef AHD_DEBUG + if ((ahd_debug & AHD_SHOW_DV) != 0) + printk("%s: %s Read Streaming\n", ahd_name(ahd), + rdstrm ? "enabling" : "disabling"); +#endif + + if (rdstrm && spi_max_width(starget)) + ppr_options |= MSG_EXT_PPR_RD_STRM; + + ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, + starget->channel + 'A', ROLE_INITIATOR); + ahd_find_syncrate(ahd, &period, &ppr_options, + dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); + + ahd_lock(ahd, &flags); + ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, + ppr_options, AHD_TRANS_GOAL, FALSE); + ahd_unlock(ahd, &flags); +} + +static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); + struct ahd_tmode_tstate *tstate; + struct ahd_initiator_tinfo *tinfo + = ahd_fetch_transinfo(ahd, + starget->channel + 'A', + shost->this_id, starget->id, &tstate); + struct ahd_devinfo devinfo; + unsigned int ppr_options = tinfo->goal.ppr_options + & ~MSG_EXT_PPR_WR_FLOW; + unsigned int period = tinfo->goal.period; + unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; + unsigned long flags; + +#ifdef AHD_DEBUG + if ((ahd_debug & AHD_SHOW_DV) != 0) + printk("%s: %s Write Flow Control\n", ahd_name(ahd), + wrflow ? "enabling" : "disabling"); +#endif + + if (wrflow && spi_max_width(starget)) + ppr_options |= MSG_EXT_PPR_WR_FLOW; + + ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, + starget->channel + 'A', ROLE_INITIATOR); + ahd_find_syncrate(ahd, &period, &ppr_options, + dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); + + ahd_lock(ahd, &flags); + ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, + ppr_options, AHD_TRANS_GOAL, FALSE); + ahd_unlock(ahd, &flags); +} + +static void ahd_linux_set_rti(struct scsi_target *starget, int rti) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); + struct ahd_tmode_tstate *tstate; + struct ahd_initiator_tinfo *tinfo + = ahd_fetch_transinfo(ahd, + starget->channel + 'A', + shost->this_id, starget->id, &tstate); + struct ahd_devinfo devinfo; + unsigned int ppr_options = tinfo->goal.ppr_options + & ~MSG_EXT_PPR_RTI; + unsigned int period = tinfo->goal.period; + unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; + unsigned long flags; + + if ((ahd->features & AHD_RTI) == 0) { +#ifdef AHD_DEBUG + if ((ahd_debug & AHD_SHOW_DV) != 0) + printk("%s: RTI not available\n", ahd_name(ahd)); +#endif + return; + } + +#ifdef AHD_DEBUG + if ((ahd_debug & AHD_SHOW_DV) != 0) + printk("%s: %s RTI\n", ahd_name(ahd), + rti ? "enabling" : "disabling"); +#endif + + if (rti && spi_max_width(starget)) + ppr_options |= MSG_EXT_PPR_RTI; + + ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, + starget->channel + 'A', ROLE_INITIATOR); + ahd_find_syncrate(ahd, &period, &ppr_options, + dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); + + ahd_lock(ahd, &flags); + ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, + ppr_options, AHD_TRANS_GOAL, FALSE); + ahd_unlock(ahd, &flags); +} + +static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); + struct ahd_tmode_tstate *tstate; + struct ahd_initiator_tinfo *tinfo + = ahd_fetch_transinfo(ahd, + starget->channel + 'A', + shost->this_id, starget->id, &tstate); + struct ahd_devinfo devinfo; + unsigned int ppr_options = tinfo->goal.ppr_options + & ~MSG_EXT_PPR_PCOMP_EN; + unsigned int period = tinfo->goal.period; + unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; + unsigned long flags; + +#ifdef AHD_DEBUG + if ((ahd_debug & AHD_SHOW_DV) != 0) + printk("%s: %s Precompensation\n", ahd_name(ahd), + pcomp ? "Enable" : "Disable"); +#endif + + if (pcomp && spi_max_width(starget)) { + uint8_t precomp; + + if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { + const struct ahd_linux_iocell_opts *iocell_opts; + + iocell_opts = &aic79xx_iocell_info[ahd->unit]; + precomp = iocell_opts->precomp; + } else { + precomp = AIC79XX_DEFAULT_PRECOMP; + } + ppr_options |= MSG_EXT_PPR_PCOMP_EN; + AHD_SET_PRECOMP(ahd, precomp); + } else { + AHD_SET_PRECOMP(ahd, 0); + } + + ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, + starget->channel + 'A', ROLE_INITIATOR); + ahd_find_syncrate(ahd, &period, &ppr_options, + dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); + + ahd_lock(ahd, &flags); + ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, + ppr_options, AHD_TRANS_GOAL, FALSE); + ahd_unlock(ahd, &flags); +} + +static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); + struct ahd_tmode_tstate *tstate; + struct ahd_initiator_tinfo *tinfo + = ahd_fetch_transinfo(ahd, + starget->channel + 'A', + shost->this_id, starget->id, &tstate); + struct ahd_devinfo devinfo; + unsigned int ppr_options = tinfo->goal.ppr_options + & ~MSG_EXT_PPR_HOLD_MCS; + unsigned int period = tinfo->goal.period; + unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; + unsigned long flags; + + if (hold && spi_max_width(starget)) + ppr_options |= MSG_EXT_PPR_HOLD_MCS; + + ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, + starget->channel + 'A', ROLE_INITIATOR); + ahd_find_syncrate(ahd, &period, &ppr_options, + dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); + + ahd_lock(ahd, &flags); + ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, + ppr_options, AHD_TRANS_GOAL, FALSE); + ahd_unlock(ahd, &flags); +} + +static void ahd_linux_get_signalling(struct Scsi_Host *shost) +{ + struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata; + unsigned long flags; + u8 mode; + + ahd_lock(ahd, &flags); + ahd_pause(ahd); + mode = ahd_inb(ahd, SBLKCTL); + ahd_unpause(ahd); + ahd_unlock(ahd, &flags); + + if (mode & ENAB40) + spi_signalling(shost) = SPI_SIGNAL_LVD; + else if (mode & ENAB20) + spi_signalling(shost) = SPI_SIGNAL_SE; + else + spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; +} + +static struct spi_function_template ahd_linux_transport_functions = { + .set_offset = ahd_linux_set_offset, + .show_offset = 1, + .set_period = ahd_linux_set_period, + .show_period = 1, + .set_width = ahd_linux_set_width, + .show_width = 1, + .set_dt = ahd_linux_set_dt, + .show_dt = 1, + .set_iu = ahd_linux_set_iu, + .show_iu = 1, + .set_qas = ahd_linux_set_qas, + .show_qas = 1, + .set_rd_strm = ahd_linux_set_rd_strm, + .show_rd_strm = 1, + .set_wr_flow = ahd_linux_set_wr_flow, + .show_wr_flow = 1, + .set_rti = ahd_linux_set_rti, + .show_rti = 1, + .set_pcomp_en = ahd_linux_set_pcomp_en, + .show_pcomp_en = 1, + .set_hold_mcs = ahd_linux_set_hold_mcs, + .show_hold_mcs = 1, + .get_signalling = ahd_linux_get_signalling, +}; + +static int __init +ahd_linux_init(void) +{ + int error = 0; + + /* + * If we've been passed any parameters, process them now. + */ + if (aic79xx) + aic79xx_setup(aic79xx); + + ahd_linux_transport_template = + spi_attach_transport(&ahd_linux_transport_functions); + if (!ahd_linux_transport_template) + return -ENODEV; + + scsi_transport_reserve_device(ahd_linux_transport_template, + sizeof(struct ahd_linux_device)); + + error = ahd_linux_pci_init(); + if (error) + spi_release_transport(ahd_linux_transport_template); + return error; +} + +static void __exit +ahd_linux_exit(void) +{ + ahd_linux_pci_exit(); + spi_release_transport(ahd_linux_transport_template); +} + +module_init(ahd_linux_init); +module_exit(ahd_linux_exit); |