/drivers/scsi/aic7xxx/aic79xx_osm.c
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- /*
- * 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 const struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
- {
- 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, void (*scsi_done) (struct scsi_cmnd *))
- {
- 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->scsi_done = scsi_done;
- 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)
- {
- struct ahd_softc *ahd;
- ahd = *((struct ahd_softc **)sdev->host->hostdata);
- 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)
- {
- int error;
-
- error = ahd_linux_queue_abort_cmd(cmd);
- return error;
- }
- /*
- * 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;
- int paused;
- int wait;
- struct ahd_initiator_tinfo *tinfo;
- struct ahd_tmode_tstate *tstate;
- unsigned long flags;
- DECLARE_COMPLETION_ONSTACK(done);
- reset_scb = NULL;
- paused = FALSE;
- wait = FALSE;
- 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 = pci_alloc_consistent(ahd->dev_softc,
- dmat->maxsize, mapp);
- 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)
- {
- pci_free_consistent(ahd->dev_softc, 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 |= MSG_ORDERED_TASK;
- dev->commands_since_idle_or_otag = 0;
- } else {
- hscb->control |= MSG_SIMPLE_TASK;
- }
- }
- 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) {
- uint32_t amount_xferred;
- amount_xferred =
- ahd_get_transfer_length(scb) - ahd_get_residual(scb);
- 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) != SCSI_STATUS_QUEUE_FULL)
- dev->tag_success_count++;
- /*
- * Some devices deal with…