--- /dev/null
+/*
+ * 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[])
+{
+ uint8_t *bh;
+ int heads;
+ int sectors;
+ int cylinders;
+ int ret;
+ int extended;
+ struct ahd_softc *ahd;
+
+ ahd = *((struct ahd_softc **)sdev->host->hostdata);
+
+ bh = scsi_bios_ptable(bdev);
+ if (bh) {
+ ret = scsi_partsize(bh, capacity,
+ &geom[2], &geom[0], &geom[1]);
+ kfree(bh);
+ if (ret != -1)
+ return (ret);
+ }
+ 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,
+ .use_clustering = ENABLE_CLUSTERING,
+ .slave_alloc = ahd_linux_slave_alloc,
+ .slave_configure = ahd_linux_slave_configure,
+ .target_alloc = ahd_linux_target_alloc,
+ .target_destroy = ahd_linux_target_destroy,
+ .use_blk_tags = 1,
+};
+
+/******************************** 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 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 SCSI_STATUS_CHECK_COND:
+ case SCSI_STATUS_CMD_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);
+ cmd->result |= (DRIVER_SENSE << 24);
+
+#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 SCSI_STATUS_QUEUE_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, SCSI_STATUS_OK);
+ 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, SCSI_STATUS_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;
+
+ /*
+ * 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 SCSI_STATUS_CMD_TERMINATED:
+ case SCSI_STATUS_CHECK_COND:
+ if ((cmd->result >> 24) != DRIVER_SENSE) {
+ do_fallback = 1;
+ } else {
+ struct scsi_sense_data *sense;
+
+ 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);
+
+ cmd->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 saved_scsiid;
+ u_int cdb_byte;
+ int retval;
+ 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");
+ retval = SUCCESS;
+ goto no_cmd;
+ }
+
+ /*
+ * 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 no_cmd;
+ }
+
+ 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 no_cmd;
+ }
+
+ 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);
+ retval = SUCCESS;
+ 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.
+ */
+ saved_scsiid = 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;
+ goto done;
+ }
+
+no_cmd:
+ /*
+ * Our assumption is that if we don't have the command, no
+ * recovery action was required, so we return success. Again,
+ * the semantics of the mid-layer recovery engine are not
+ * well defined, so this may change in time.
+ */
+ retval = SUCCESS;
+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);
Code Review / kvmfornfv.git / blobdiff