--- /dev/null
+/*
+ * Adaptec AIC7xxx device driver for Linux.
+ *
+ * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $
+ *
+ * Copyright (c) 1994 John Aycock
+ * The University of Calgary Department of Computer Science.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F
+ * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA
+ * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,
+ * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,
+ * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file
+ * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,
+ * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the
+ * ANSI SCSI-2 specification (draft 10c), ...
+ *
+ * --------------------------------------------------------------------------
+ *
+ * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):
+ *
+ * Substantially modified to include support for wide and twin bus
+ * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,
+ * SCB paging, and other rework of the code.
+ *
+ * --------------------------------------------------------------------------
+ * Copyright (c) 1994-2000 Justin T. Gibbs.
+ * Copyright (c) 2000-2001 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.
+ *
+ *---------------------------------------------------------------------------
+ *
+ * Thanks also go to (in alphabetical order) the following:
+ *
+ * Rory Bolt - Sequencer bug fixes
+ * Jay Estabrook - Initial DEC Alpha support
+ * Doug Ledford - Much needed abort/reset bug fixes
+ * Kai Makisara - DMAing of SCBs
+ *
+ * A Boot time option was also added for not resetting the scsi bus.
+ *
+ * Form: aic7xxx=extended
+ * aic7xxx=no_reset
+ * aic7xxx=verbose
+ *
+ * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97
+ *
+ * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp
+ */
+
+/*
+ * Further driver modifications made by Doug Ledford <dledford@redhat.com>
+ *
+ * Copyright (c) 1997-1999 Doug Ledford
+ *
+ * These changes are released under the same licensing terms as the FreeBSD
+ * driver written by Justin Gibbs. Please see his Copyright notice above
+ * for the exact terms and conditions covering my changes as well as the
+ * warranty statement.
+ *
+ * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include
+ * but are not limited to:
+ *
+ * 1: Import of the latest FreeBSD sequencer code for this driver
+ * 2: Modification of kernel code to accommodate different sequencer semantics
+ * 3: Extensive changes throughout kernel portion of driver to improve
+ * abort/reset processing and error hanndling
+ * 4: Other work contributed by various people on the Internet
+ * 5: Changes to printk information and verbosity selection code
+ * 6: General reliability related changes, especially in IRQ management
+ * 7: Modifications to the default probe/attach order for supported cards
+ * 8: SMP friendliness has been improved
+ *
+ */
+
+#include "aic7xxx_osm.h"
+#include "aic7xxx_inline.h"
+#include <scsi/scsicam.h>
+
+static struct scsi_transport_template *ahc_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/slab.h>
+
+
+/*
+ * 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_AIC7XXX_RESET_DELAY_MS
+#define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
+#else
+#define AIC7XXX_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="aic7xxx=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 {
+ uint8_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 aic7xxx 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 aic7xxx_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_AIC7XXX_CMDS_PER_DEVICE
+#define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
+#else
+#define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
+#endif
+
+#define AIC7XXX_CONFIGED_TAG_COMMANDS { \
+ AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
+ AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
+ AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
+ AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
+ AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
+ AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
+ AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
+ AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
+}
+
+/*
+ * By default, use the number of commands specified by
+ * the users kernel configuration.
+ */
+static adapter_tag_info_t aic7xxx_tag_info[] =
+{
+ {AIC7XXX_CONFIGED_TAG_COMMANDS},
+ {AIC7XXX_CONFIGED_TAG_COMMANDS},
+ {AIC7XXX_CONFIGED_TAG_COMMANDS},
+ {AIC7XXX_CONFIGED_TAG_COMMANDS},
+ {AIC7XXX_CONFIGED_TAG_COMMANDS},
+ {AIC7XXX_CONFIGED_TAG_COMMANDS},
+ {AIC7XXX_CONFIGED_TAG_COMMANDS},
+ {AIC7XXX_CONFIGED_TAG_COMMANDS},
+ {AIC7XXX_CONFIGED_TAG_COMMANDS},
+ {AIC7XXX_CONFIGED_TAG_COMMANDS},
+ {AIC7XXX_CONFIGED_TAG_COMMANDS},
+ {AIC7XXX_CONFIGED_TAG_COMMANDS},
+ {AIC7XXX_CONFIGED_TAG_COMMANDS},
+ {AIC7XXX_CONFIGED_TAG_COMMANDS},
+ {AIC7XXX_CONFIGED_TAG_COMMANDS},
+ {AIC7XXX_CONFIGED_TAG_COMMANDS}
+};
+
+/*
+ * 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
+ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
+{
+ printk("(scsi%d:%c:%d:%d): ",
+ ahc->platform_data->host->host_no,
+ scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
+ scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
+ scb != NULL ? SCB_GET_LUN(scb) : -1);
+}
+
+/*
+ * XXX - these options apply unilaterally to _all_ 274x/284x/294x
+ * 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 aic7xxx_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 aic7xxx_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 where stray PCI transactions with bad parity are
+ * the norm rather than the exception, the error messages can be overwhelming.
+ * It's included in the driver for completeness.
+ * 0 = Shut off PCI parity check
+ * non-0 = reverse polarity pci parity checking
+ */
+static uint32_t aic7xxx_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 aic7xxx_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 aic7xxx_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 aic7xxx_periodic_otag;
+
+/*
+ * Module information and settable options.
+ */
+static char *aic7xxx = NULL;
+
+MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
+MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
+module_param(aic7xxx, charp, 0444);
+MODULE_PARM_DESC(aic7xxx,
+"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_probe Toggle EISA/VLB controller probing\n"
+" probe_eisa_vl Toggle EISA/VLB controller probing\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"
+" drives or RAID arrays.\n"
+" tag_info:<tag_str> Set per-target tag depth\n"
+" global_tag_depth:<int> Global tag depth for every target\n"
+" on every bus\n"
+" seltime:<int> Selection Timeout\n"
+" (0/256ms,1/128ms,2/64ms,3/32ms)\n"
+"\n"
+" Sample modprobe configuration file:\n"
+" # Toggle EISA/VLB probing\n"
+" # Set tag depth on Controller 1/Target 1 to 10 tags\n"
+" # Shorten the selection timeout to 128ms\n"
+"\n"
+" options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
+);
+
+static void ahc_linux_handle_scsi_status(struct ahc_softc *,
+ struct scsi_device *,
+ struct scb *);
+static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
+ struct scsi_cmnd *cmd);
+static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
+static void ahc_linux_release_simq(struct ahc_softc *ahc);
+static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
+static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
+static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
+ struct ahc_devinfo *devinfo);
+static void ahc_linux_device_queue_depth(struct scsi_device *);
+static int ahc_linux_run_command(struct ahc_softc*,
+ struct ahc_linux_device *,
+ struct scsi_cmnd *);
+static void ahc_linux_setup_tag_info_global(char *p);
+static int aic7xxx_setup(char *s);
+
+static int ahc_linux_unit;
+
+
+/************************** OS Utility Wrappers *******************************/
+void
+ahc_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
+ahc_inb(struct ahc_softc * ahc, long port)
+{
+ uint8_t x;
+
+ if (ahc->tag == BUS_SPACE_MEMIO) {
+ x = readb(ahc->bsh.maddr + port);
+ } else {
+ x = inb(ahc->bsh.ioport + port);
+ }
+ mb();
+ return (x);
+}
+
+void
+ahc_outb(struct ahc_softc * ahc, long port, uint8_t val)
+{
+ if (ahc->tag == BUS_SPACE_MEMIO) {
+ writeb(val, ahc->bsh.maddr + port);
+ } else {
+ outb(val, ahc->bsh.ioport + port);
+ }
+ mb();
+}
+
+void
+ahc_outsb(struct ahc_softc * ahc, 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++)
+ ahc_outb(ahc, port, *array++);
+}
+
+void
+ahc_insb(struct ahc_softc * ahc, 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++ = ahc_inb(ahc, port);
+}
+
+/********************************* Inlines ************************************/
+static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
+
+static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
+ struct ahc_dma_seg *sg,
+ dma_addr_t addr, bus_size_t len);
+
+static void
+ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
+{
+ struct scsi_cmnd *cmd;
+
+ cmd = scb->io_ctx;
+ ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
+
+ scsi_dma_unmap(cmd);
+}
+
+static int
+ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
+ struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)
+{
+ int consumed;
+
+ if ((scb->sg_count + 1) > AHC_NSEG)
+ panic("Too few segs for dma mapping. "
+ "Increase AHC_NSEG\n");
+
+ consumed = 1;
+ sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
+ scb->platform_data->xfer_len += len;
+
+ if (sizeof(dma_addr_t) > 4
+ && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
+ len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
+
+ sg->len = ahc_htole32(len);
+ return (consumed);
+}
+
+/*
+ * Return a string describing the driver.
+ */
+static const char *
+ahc_linux_info(struct Scsi_Host *host)
+{
+ static char buffer[512];
+ char ahc_info[256];
+ char *bp;
+ struct ahc_softc *ahc;
+
+ bp = &buffer[0];
+ ahc = *(struct ahc_softc **)host->hostdata;
+ memset(bp, 0, sizeof(buffer));
+ strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION "\n"
+ " <");
+ strcat(bp, ahc->description);
+ strcat(bp, ">\n"
+ " ");
+ ahc_controller_info(ahc, ahc_info);
+ strcat(bp, ahc_info);
+ strcat(bp, "\n");
+
+ return (bp);
+}
+
+/*
+ * Queue an SCB to the controller.
+ */
+static int
+ahc_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
+{
+ struct ahc_softc *ahc;
+ struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device);
+ int rtn = SCSI_MLQUEUE_HOST_BUSY;
+ unsigned long flags;
+
+ ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
+
+ ahc_lock(ahc, &flags);
+ if (ahc->platform_data->qfrozen == 0) {
+ cmd->scsi_done = scsi_done;
+ cmd->result = CAM_REQ_INPROG << 16;
+ rtn = ahc_linux_run_command(ahc, dev, cmd);
+ }
+ ahc_unlock(ahc, &flags);
+
+ return rtn;
+}
+
+static DEF_SCSI_QCMD(ahc_linux_queue)
+
+static inline struct scsi_target **
+ahc_linux_target_in_softc(struct scsi_target *starget)
+{
+ struct ahc_softc *ahc =
+ *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
+ unsigned int target_offset;
+
+ target_offset = starget->id;
+ if (starget->channel != 0)
+ target_offset += 8;
+
+ return &ahc->platform_data->starget[target_offset];
+}
+
+static int
+ahc_linux_target_alloc(struct scsi_target *starget)
+{
+ struct ahc_softc *ahc =
+ *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
+ struct seeprom_config *sc = ahc->seep_config;
+ unsigned long flags;
+ struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
+ unsigned short scsirate;
+ struct ahc_devinfo devinfo;
+ struct ahc_initiator_tinfo *tinfo;
+ struct ahc_tmode_tstate *tstate;
+ char channel = starget->channel + 'A';
+ unsigned int our_id = ahc->our_id;
+ unsigned int target_offset;
+
+ target_offset = starget->id;
+ if (starget->channel != 0)
+ target_offset += 8;
+
+ if (starget->channel)
+ our_id = ahc->our_id_b;
+
+ ahc_lock(ahc, &flags);
+
+ BUG_ON(*ahc_targp != NULL);
+
+ *ahc_targp = starget;
+
+ if (sc) {
+ int maxsync = AHC_SYNCRATE_DT;
+ int ultra = 0;
+ int flags = sc->device_flags[target_offset];
+
+ if (ahc->flags & AHC_NEWEEPROM_FMT) {
+ if (flags & CFSYNCHISULTRA)
+ ultra = 1;
+ } else if (flags & CFULTRAEN)
+ ultra = 1;
+ /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
+ * change it to ultra=0, CFXFER = 0 */
+ if(ultra && (flags & CFXFER) == 0x04) {
+ ultra = 0;
+ flags &= ~CFXFER;
+ }
+
+ if ((ahc->features & AHC_ULTRA2) != 0) {
+ scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);
+ } else {
+ scsirate = (flags & CFXFER) << 4;
+ maxsync = ultra ? AHC_SYNCRATE_ULTRA :
+ AHC_SYNCRATE_FAST;
+ }
+ spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
+ if (!(flags & CFSYNCH))
+ spi_max_offset(starget) = 0;
+ spi_min_period(starget) =
+ ahc_find_period(ahc, scsirate, maxsync);
+
+ tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
+ starget->id, &tstate);
+ }
+ ahc_compile_devinfo(&devinfo, our_id, starget->id,
+ CAM_LUN_WILDCARD, channel,
+ ROLE_INITIATOR);
+ ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
+ AHC_TRANS_GOAL, /*paused*/FALSE);
+ ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
+ AHC_TRANS_GOAL, /*paused*/FALSE);
+ ahc_unlock(ahc, &flags);
+
+ return 0;
+}
+
+static void
+ahc_linux_target_destroy(struct scsi_target *starget)
+{
+ struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
+
+ *ahc_targp = NULL;
+}
+
+static int
+ahc_linux_slave_alloc(struct scsi_device *sdev)
+{
+ struct ahc_softc *ahc =
+ *((struct ahc_softc **)sdev->host->hostdata);
+ struct scsi_target *starget = sdev->sdev_target;
+ struct ahc_linux_device *dev;
+
+ if (bootverbose)
+ printk("%s: Slave Alloc %d\n", ahc_name(ahc), 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;
+
+ spi_period(starget) = 0;
+
+ return 0;
+}
+
+static int
+ahc_linux_slave_configure(struct scsi_device *sdev)
+{
+ struct ahc_softc *ahc;
+
+ ahc = *((struct ahc_softc **)sdev->host->hostdata);
+
+ if (bootverbose)
+ sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
+
+ ahc_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
+ahc_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 ahc_softc *ahc;
+ u_int channel;
+
+ ahc = *((struct ahc_softc **)sdev->host->hostdata);
+ channel = sdev_channel(sdev);
+
+ 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 (aic7xxx_extended != 0)
+ extended = 1;
+ else if (channel == 0)
+ extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
+ else
+ extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 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
+ahc_linux_abort(struct scsi_cmnd *cmd)
+{
+ int error;
+
+ error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
+ if (error != 0)
+ printk("aic7xxx_abort returns 0x%x\n", error);
+ return (error);
+}
+
+/*
+ * Attempt to send a target reset message to the device that timed out.
+ */
+static int
+ahc_linux_dev_reset(struct scsi_cmnd *cmd)
+{
+ int error;
+
+ error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
+ if (error != 0)
+ printk("aic7xxx_dev_reset returns 0x%x\n", error);
+ return (error);
+}
+
+/*
+ * Reset the SCSI bus.
+ */
+static int
+ahc_linux_bus_reset(struct scsi_cmnd *cmd)
+{
+ struct ahc_softc *ahc;
+ int found;
+ unsigned long flags;
+
+ ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
+
+ ahc_lock(ahc, &flags);
+ found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A',
+ /*initiate reset*/TRUE);
+ ahc_unlock(ahc, &flags);
+
+ if (bootverbose)
+ printk("%s: SCSI bus reset delivered. "
+ "%d SCBs aborted.\n", ahc_name(ahc), found);
+
+ return SUCCESS;
+}
+
+struct scsi_host_template aic7xxx_driver_template = {
+ .module = THIS_MODULE,
+ .name = "aic7xxx",
+ .proc_name = "aic7xxx",
+ .show_info = ahc_linux_show_info,
+ .write_info = ahc_proc_write_seeprom,
+ .info = ahc_linux_info,
+ .queuecommand = ahc_linux_queue,
+ .eh_abort_handler = ahc_linux_abort,
+ .eh_device_reset_handler = ahc_linux_dev_reset,
+ .eh_bus_reset_handler = ahc_linux_bus_reset,
+#if defined(__i386__)
+ .bios_param = ahc_linux_biosparam,
+#endif
+ .can_queue = AHC_MAX_QUEUE,
+ .this_id = -1,
+ .max_sectors = 8192,
+ .cmd_per_lun = 2,
+ .use_clustering = ENABLE_CLUSTERING,
+ .slave_alloc = ahc_linux_slave_alloc,
+ .slave_configure = ahc_linux_slave_configure,
+ .target_alloc = ahc_linux_target_alloc,
+ .target_destroy = ahc_linux_target_destroy,
+ .use_blk_tags = 1,
+};
+
+/**************************** Tasklet Handler *********************************/
+
+/******************************** Macros **************************************/
+#define BUILD_SCSIID(ahc, cmd) \
+ ((((cmd)->device->id << TID_SHIFT) & TID) \
+ | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
+ | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
+
+/******************************** Bus DMA *************************************/
+int
+ahc_dma_tag_create(struct ahc_softc *ahc, 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
+ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
+{
+ kfree(dmat);
+}
+
+int
+ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
+ int flags, bus_dmamap_t *mapp)
+{
+ *vaddr = pci_alloc_consistent(ahc->dev_softc,
+ dmat->maxsize, mapp);
+ if (*vaddr == NULL)
+ return ENOMEM;
+ return 0;
+}
+
+void
+ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
+ void* vaddr, bus_dmamap_t map)
+{
+ pci_free_consistent(ahc->dev_softc, dmat->maxsize,
+ vaddr, map);
+}
+
+int
+ahc_dmamap_load(struct ahc_softc *ahc, 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
+ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
+{
+}
+
+int
+ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
+{
+ /* Nothing to do */
+ return (0);
+}
+
+static void
+ahc_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(aic7xxx_tag_info); i++) {
+ for (j = 0; j < AHC_NUM_TARGETS; j++) {
+ aic7xxx_tag_info[i].tag_commands[j] = tags;
+ }
+ }
+}
+
+static void
+ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
+{
+
+ if ((instance >= 0) && (targ >= 0)
+ && (instance < ARRAY_SIZE(aic7xxx_tag_info))
+ && (targ < AHC_NUM_TARGETS)) {
+ aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
+ if (bootverbose)
+ printk("tag_info[%d:%d] = %d\n", instance, targ, value);
+ }
+}
+
+static char *
+ahc_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. aic7xxx=stpwlev:1,extended
+ */
+static int
+aic7xxx_setup(char *s)
+{
+ int i, n;
+ char *p;
+ char *end;
+
+ static const struct {
+ const char *name;
+ uint32_t *flag;
+ } options[] = {
+ { "extended", &aic7xxx_extended },
+ { "no_reset", &aic7xxx_no_reset },
+ { "verbose", &aic7xxx_verbose },
+ { "allow_memio", &aic7xxx_allow_memio},
+#ifdef AHC_DEBUG
+ { "debug", &ahc_debug },
+#endif
+ { "periodic_otag", &aic7xxx_periodic_otag },
+ { "pci_parity", &aic7xxx_pci_parity },
+ { "seltime", &aic7xxx_seltime },
+ { "tag_info", NULL },
+ { "global_tag_depth", NULL },
+ { "dv", NULL }
+ };
+
+ 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) {
+ ahc_linux_setup_tag_info_global(p + n);
+ } else if (strncmp(p, "tag_info", n) == 0) {
+ s = ahc_parse_brace_option("tag_info", p + n, end,
+ 2, ahc_linux_setup_tag_info, 0);
+ } else if (p[n] == ':') {
+ *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
+ } else if (strncmp(p, "verbose", n) == 0) {
+ *(options[i].flag) = 1;
+ } else {
+ *(options[i].flag) ^= 0xFFFFFFFF;
+ }
+ }
+ return 1;
+}
+
+__setup("aic7xxx=", aic7xxx_setup);
+
+uint32_t aic7xxx_verbose;
+
+int
+ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
+{
+ char buf[80];
+ struct Scsi_Host *host;
+ char *new_name;
+ u_long s;
+ int retval;
+
+ template->name = ahc->description;
+ host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
+ if (host == NULL)
+ return (ENOMEM);
+
+ *((struct ahc_softc **)host->hostdata) = ahc;
+ ahc->platform_data->host = host;
+ host->can_queue = AHC_MAX_QUEUE;
+ host->cmd_per_lun = 2;
+ /* XXX No way to communicate the ID for multiple channels */
+ host->this_id = ahc->our_id;
+ host->irq = ahc->platform_data->irq;
+ host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
+ host->max_lun = AHC_NUM_LUNS;
+ host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
+ host->sg_tablesize = AHC_NSEG;
+ ahc_lock(ahc, &s);
+ ahc_set_unit(ahc, ahc_linux_unit++);
+ ahc_unlock(ahc, &s);
+ sprintf(buf, "scsi%d", host->host_no);
+ new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
+ if (new_name != NULL) {
+ strcpy(new_name, buf);
+ ahc_set_name(ahc, new_name);
+ }
+ host->unique_id = ahc->unit;
+ ahc_linux_initialize_scsi_bus(ahc);
+ ahc_intr_enable(ahc, TRUE);
+
+ host->transportt = ahc_linux_transport_template;
+
+ retval = scsi_add_host(host,
+ (ahc->dev_softc ? &ahc->dev_softc->dev : NULL));
+ if (retval) {
+ printk(KERN_WARNING "aic7xxx: 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.
+ */
+void
+ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
+{
+ int i;
+ int numtarg;
+ unsigned long s;
+
+ i = 0;
+ numtarg = 0;
+
+ ahc_lock(ahc, &s);
+
+ if (aic7xxx_no_reset != 0)
+ ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
+
+ if ((ahc->flags & AHC_RESET_BUS_A) != 0)
+ ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
+ else
+ numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
+
+ if ((ahc->features & AHC_TWIN) != 0) {
+
+ if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
+ ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
+ } else {
+ if (numtarg == 0)
+ i = 8;
+ numtarg += 8;
+ }
+ }
+
+ /*
+ * Force negotiation to async for all targets that
+ * will not see an initial bus reset.
+ */
+ for (; i < numtarg; i++) {
+ struct ahc_devinfo devinfo;
+ struct ahc_initiator_tinfo *tinfo;
+ struct ahc_tmode_tstate *tstate;
+ u_int our_id;
+ u_int target_id;
+ char channel;
+
+ channel = 'A';
+ our_id = ahc->our_id;
+ target_id = i;
+ if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
+ channel = 'B';
+ our_id = ahc->our_id_b;
+ target_id = i % 8;
+ }
+ tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
+ target_id, &tstate);
+ ahc_compile_devinfo(&devinfo, our_id, target_id,
+ CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
+ ahc_update_neg_request(ahc, &devinfo, tstate,
+ tinfo, AHC_NEG_ALWAYS);
+ }
+ ahc_unlock(ahc, &s);
+ /* Give the bus some time to recover */
+ if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
+ ahc_linux_freeze_simq(ahc);
+ msleep(AIC7XXX_RESET_DELAY);
+ ahc_linux_release_simq(ahc);
+ }
+}
+
+int
+ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
+{
+
+ ahc->platform_data =
+ kzalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC);
+ if (ahc->platform_data == NULL)
+ return (ENOMEM);
+ ahc->platform_data->irq = AHC_LINUX_NOIRQ;
+ ahc_lockinit(ahc);
+ ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
+ ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
+ if (aic7xxx_pci_parity == 0)
+ ahc->flags |= AHC_DISABLE_PCI_PERR;
+
+ return (0);
+}
+
+void
+ahc_platform_free(struct ahc_softc *ahc)
+{
+ struct scsi_target *starget;
+ int i;
+
+ if (ahc->platform_data != NULL) {
+ /* destroy all of the device and target objects */
+ for (i = 0; i < AHC_NUM_TARGETS; i++) {
+ starget = ahc->platform_data->starget[i];
+ if (starget != NULL) {
+ ahc->platform_data->starget[i] = NULL;
+ }
+ }
+
+ if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
+ free_irq(ahc->platform_data->irq, ahc);
+ if (ahc->tag == BUS_SPACE_PIO
+ && ahc->bsh.ioport != 0)
+ release_region(ahc->bsh.ioport, 256);
+ if (ahc->tag == BUS_SPACE_MEMIO
+ && ahc->bsh.maddr != NULL) {
+ iounmap(ahc->bsh.maddr);
+ release_mem_region(ahc->platform_data->mem_busaddr,
+ 0x1000);
+ }
+
+ if (ahc->platform_data->host)
+ scsi_host_put(ahc->platform_data->host);
+
+ kfree(ahc->platform_data);
+ }
+}
+
+void
+ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
+{
+ ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
+ SCB_GET_CHANNEL(ahc, scb),
+ SCB_GET_LUN(scb), SCB_LIST_NULL,
+ ROLE_UNKNOWN, CAM_REQUEUE_REQ);
+}
+
+void
+ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev,
+ struct ahc_devinfo *devinfo, ahc_queue_alg alg)
+{
+ struct ahc_linux_device *dev;
+ int was_queuing;
+ int now_queuing;
+
+ if (sdev == NULL)
+ return;
+ dev = scsi_transport_device_data(sdev);
+
+ was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
+ switch (alg) {
+ default:
+ case AHC_QUEUE_NONE:
+ now_queuing = 0;
+ break;
+ case AHC_QUEUE_BASIC:
+ now_queuing = AHC_DEV_Q_BASIC;
+ break;
+ case AHC_QUEUE_TAGGED:
+ now_queuing = AHC_DEV_Q_TAGGED;
+ break;
+ }
+ if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
+ && (was_queuing != now_queuing)
+ && (dev->active != 0)) {
+ dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
+ dev->qfrozen++;
+ }
+
+ dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
+ if (now_queuing) {
+ u_int usertags;
+
+ usertags = ahc_linux_user_tagdepth(ahc, 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 == AHC_QUEUE_TAGGED) {
+ dev->flags |= AHC_DEV_Q_TAGGED;
+ if (aic7xxx_periodic_otag != 0)
+ dev->flags |= AHC_DEV_PERIODIC_OTAG;
+ } else
+ dev->flags |= AHC_DEV_Q_BASIC;
+ } else {
+ /* We can only have one opening. */
+ dev->maxtags = 0;
+ dev->openings = 1 - dev->active;
+ }
+ switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
+ case AHC_DEV_Q_BASIC:
+ case AHC_DEV_Q_TAGGED:
+ scsi_change_queue_depth(sdev,
+ dev->openings + dev->active);
+ 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, 2);
+ break;
+ }
+}
+
+int
+ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
+ int lun, u_int tag, role_t role, uint32_t status)
+{
+ return 0;
+}
+
+static u_int
+ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
+{
+ static int warned_user;
+ u_int tags;
+
+ tags = 0;
+ if ((ahc->user_discenable & devinfo->target_mask) != 0) {
+ if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) {
+ if (warned_user == 0) {
+
+ printk(KERN_WARNING
+"aic7xxx: WARNING: Insufficient tag_info instances\n"
+"aic7xxx: for installed controllers. Using defaults\n"
+"aic7xxx: Please update the aic7xxx_tag_info array in\n"
+"aic7xxx: the aic7xxx_osm..c source file.\n");
+ warned_user++;
+ }
+ tags = AHC_MAX_QUEUE;
+ } else {
+ adapter_tag_info_t *tag_info;
+
+ tag_info = &aic7xxx_tag_info[ahc->unit];
+ tags = tag_info->tag_commands[devinfo->target_offset];
+ if (tags > AHC_MAX_QUEUE)
+ tags = AHC_MAX_QUEUE;
+ }
+ }
+ return (tags);
+}
+
+/*
+ * Determines the queue depth for a given device.
+ */
+static void
+ahc_linux_device_queue_depth(struct scsi_device *sdev)
+{
+ struct ahc_devinfo devinfo;
+ u_int tags;
+ struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
+
+ ahc_compile_devinfo(&devinfo,
+ sdev->sdev_target->channel == 0
+ ? ahc->our_id : ahc->our_id_b,
+ sdev->sdev_target->id, sdev->lun,
+ sdev->sdev_target->channel == 0 ? 'A' : 'B',
+ ROLE_INITIATOR);
+ tags = ahc_linux_user_tagdepth(ahc, &devinfo);
+ if (tags != 0 && sdev->tagged_supported != 0) {
+
+ ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED);
+ ahc_send_async(ahc, devinfo.channel, devinfo.target,
+ devinfo.lun, AC_TRANSFER_NEG);
+ ahc_print_devinfo(ahc, &devinfo);
+ printk("Tagged Queuing enabled. Depth %d\n", tags);
+ } else {
+ ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE);
+ ahc_send_async(ahc, devinfo.channel, devinfo.target,
+ devinfo.lun, AC_TRANSFER_NEG);
+ }
+}
+
+static int
+ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
+ struct scsi_cmnd *cmd)
+{
+ struct scb *scb;
+ struct hardware_scb *hscb;
+ struct ahc_initiator_tinfo *tinfo;
+ struct ahc_tmode_tstate *tstate;
+ uint16_t mask;
+ struct scb_tailq *untagged_q = NULL;
+ int nseg;
+
+ /*
+ * Schedule us to run later. The only reason we are not
+ * running is because the whole controller Q is frozen.
+ */
+ if (ahc->platform_data->qfrozen != 0)
+ return SCSI_MLQUEUE_HOST_BUSY;
+
+ /*
+ * We only allow one untagged transaction
+ * per target in the initiator role unless
+ * we are storing a full busy target *lun*
+ * table in SCB space.
+ */
+ if (!(cmd->flags & SCMD_TAGGED)
+ && (ahc->features & AHC_SCB_BTT) == 0) {
+ int target_offset;
+
+ target_offset = cmd->device->id + cmd->device->channel * 8;
+ untagged_q = &(ahc->untagged_queues[target_offset]);
+ if (!TAILQ_EMPTY(untagged_q))
+ /* if we're already executing an untagged command
+ * we're busy to another */
+ return SCSI_MLQUEUE_DEVICE_BUSY;
+ }
+
+ nseg = scsi_dma_map(cmd);
+ if (nseg < 0)
+ return SCSI_MLQUEUE_HOST_BUSY;
+
+ /*
+ * Get an scb to use.
+ */
+ scb = ahc_get_scb(ahc);
+ if (!scb) {
+ 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(ahc, cmd);
+ hscb->lun = cmd->device->lun;
+ mask = SCB_GET_TARGET_MASK(ahc, scb);
+ tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
+ SCB_GET_OUR_ID(scb),
+ SCB_GET_TARGET(ahc, scb), &tstate);
+ hscb->scsirate = tinfo->scsirate;
+ hscb->scsioffset = tinfo->curr.offset;
+ if ((tstate->ultraenb & mask) != 0)
+ hscb->control |= ULTRAENB;
+
+ if ((ahc->user_discenable & mask) != 0)
+ hscb->control |= DISCENB;
+
+ if ((tstate->auto_negotiate & mask) != 0) {
+ scb->flags |= SCB_AUTO_NEGOTIATE;
+ scb->hscb->control |= MK_MESSAGE;
+ }
+
+ if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
+ if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
+ && (dev->flags & AHC_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;
+ if (hscb->cdb_len <= 12) {
+ memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
+ } else {
+ memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
+ scb->flags |= SCB_CDB32_PTR;
+ }
+
+ scb->platform_data->xfer_len = 0;
+ ahc_set_residual(scb, 0);
+ ahc_set_sense_residual(scb, 0);
+ scb->sg_count = 0;
+
+ if (nseg > 0) {
+ struct ahc_dma_seg *sg;
+ struct scatterlist *cur_seg;
+ int i;
+
+ /* Copy the segments into the SG list. */
+ sg = scb->sg_list;
+ /*
+ * The sg_count may be larger than nseg if
+ * a transfer crosses a 32bit page.
+ */
+ scsi_for_each_sg(cmd, cur_seg, nseg, i) {
+ dma_addr_t addr;
+ bus_size_t len;
+ int consumed;
+
+ addr = sg_dma_address(cur_seg);
+ len = sg_dma_len(cur_seg);
+ consumed = ahc_linux_map_seg(ahc, scb,
+ sg, addr, len);
+ sg += consumed;
+ scb->sg_count += consumed;
+ }
+ sg--;
+ sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
+
+ /*
+ * Reset the sg list pointer.
+ */
+ scb->hscb->sgptr =
+ ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
+
+ /*
+ * Copy the first SG into the "current"
+ * data pointer area.
+ */
+ scb->hscb->dataptr = scb->sg_list->addr;
+ scb->hscb->datacnt = scb->sg_list->len;
+ } else {
+ scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
+ scb->hscb->dataptr = 0;
+ scb->hscb->datacnt = 0;
+ scb->sg_count = 0;
+ }
+
+ LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
+ dev->openings--;
+ dev->active++;
+ dev->commands_issued++;
+ if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
+ dev->commands_since_idle_or_otag++;
+
+ scb->flags |= SCB_ACTIVE;
+ if (untagged_q) {
+ TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
+ scb->flags |= SCB_UNTAGGEDQ;
+ }
+ ahc_queue_scb(ahc, scb);
+ return 0;
+}
+
+/*
+ * SCSI controller interrupt handler.
+ */
+irqreturn_t
+ahc_linux_isr(int irq, void *dev_id)
+{
+ struct ahc_softc *ahc;
+ u_long flags;
+ int ours;
+
+ ahc = (struct ahc_softc *) dev_id;
+ ahc_lock(ahc, &flags);
+ ours = ahc_intr(ahc);
+ ahc_unlock(ahc, &flags);
+ return IRQ_RETVAL(ours);
+}
+
+void
+ahc_platform_flushwork(struct ahc_softc *ahc)
+{
+
+}
+
+void
+ahc_send_async(struct ahc_softc *ahc, char channel,
+ u_int target, u_int lun, ac_code code)
+{
+ switch (code) {
+ case AC_TRANSFER_NEG:
+ {
+ struct scsi_target *starget;
+ struct ahc_linux_target *targ;
+ struct ahc_initiator_tinfo *tinfo;
+ struct ahc_tmode_tstate *tstate;
+ int target_offset;
+ unsigned int target_ppr_options;
+
+ BUG_ON(target == CAM_TARGET_WILDCARD);
+
+ tinfo = ahc_fetch_transinfo(ahc, channel,
+ channel == 'A' ? ahc->our_id
+ : ahc->our_id_b,
+ 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.
+ */
+ target_offset = target;
+ if (channel == 'B')
+ target_offset += 8;
+ starget = ahc->platform_data->starget[target_offset];
+ if (starget == NULL)
+ break;
+ targ = scsi_transport_target_data(starget);
+
+ 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);
+
+ 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_display_xfer_agreement(starget);
+ break;
+ }
+ case AC_SENT_BDR:
+ {
+ WARN_ON(lun != CAM_LUN_WILDCARD);
+ scsi_report_device_reset(ahc->platform_data->host,
+ channel - 'A', target);
+ break;
+ }
+ case AC_BUS_RESET:
+ if (ahc->platform_data->host != NULL) {
+ scsi_report_bus_reset(ahc->platform_data->host,
+ channel - 'A');
+ }
+ break;
+ default:
+ panic("ahc_send_async: Unexpected async event");
+ }
+}
+
+/*
+ * Calls the higher level scsi done function and frees the scb.
+ */
+void
+ahc_done(struct ahc_softc *ahc, struct scb *scb)
+{
+ struct scsi_cmnd *cmd;
+ struct ahc_linux_device *dev;
+
+ LIST_REMOVE(scb, pending_links);
+ if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
+ struct scb_tailq *untagged_q;
+ int target_offset;
+
+ target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
+ untagged_q = &(ahc->untagged_queues[target_offset]);
+ TAILQ_REMOVE(untagged_q, scb, links.tqe);
+ BUG_ON(!TAILQ_EMPTY(untagged_q));
+ } else if ((scb->flags & SCB_ACTIVE) == 0) {
+ /*
+ * Transactions aborted from the untagged queue may
+ * not have been dispatched to the controller, so
+ * only check the SCB_ACTIVE flag for tagged transactions.
+ */
+ printk("SCB %d done'd twice\n", scb->hscb->tag);
+ ahc_dump_card_state(ahc);
+ panic("Stopping for safety");
+ }
+ 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--;
+ }
+ ahc_linux_unmap_scb(ahc, 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 (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
+ uint32_t amount_xferred;
+
+ amount_xferred =
+ ahc_get_transfer_length(scb) - ahc_get_residual(scb);
+ if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
+#ifdef AHC_DEBUG
+ if ((ahc_debug & AHC_SHOW_MISC) != 0) {
+ ahc_print_path(ahc, scb);
+ printk("Set CAM_UNCOR_PARITY\n");
+ }
+#endif
+ ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
+#ifdef AHC_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;
+
+ ahc_print_path(ahc, scb);
+ printk("CDB:");
+ for (i = 0; i < scb->io_ctx->cmd_len; i++)
+ printk(" 0x%x", scb->io_ctx->cmnd[i]);
+ printk("\n");
+ ahc_print_path(ahc, scb);
+ printk("Saw underflow (%ld of %ld bytes). "
+ "Treated as error\n",
+ ahc_get_residual(scb),
+ ahc_get_transfer_length(scb));
+ ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
+#endif
+ } else {
+ ahc_set_transaction_status(scb, CAM_REQ_CMP);
+ }
+ } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
+ ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
+ }
+
+ if (dev->openings == 1
+ && ahc_get_transaction_status(scb) == CAM_REQ_CMP
+ && ahc_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 > AHC_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 (ahc_get_transaction_status(scb) == CAM_BDR_SENT
+ || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
+ ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
+
+ if (ahc->platform_data->eh_done)
+ complete(ahc->platform_data->eh_done);
+ }
+
+ ahc_free_scb(ahc, scb);
+ ahc_linux_queue_cmd_complete(ahc, cmd);
+}
+
+static void
+ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
+ struct scsi_device *sdev, struct scb *scb)
+{
+ struct ahc_devinfo devinfo;
+ struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
+
+ ahc_compile_devinfo(&devinfo,
+ ahc->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 (ahc_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) {
+ u_int sense_size;
+
+ sense_size = min(sizeof(struct scsi_sense_data)
+ - ahc_get_sense_residual(scb),
+ (u_long)SCSI_SENSE_BUFFERSIZE);
+ memcpy(cmd->sense_buffer,
+ ahc_get_sense_buf(ahc, scb), sense_size);
+ if (sense_size < SCSI_SENSE_BUFFERSIZE)
+ memset(&cmd->sense_buffer[sense_size], 0,
+ SCSI_SENSE_BUFFERSIZE - sense_size);
+ cmd->result |= (DRIVER_SENSE << 24);
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_SENSE) {
+ int i;
+
+ printk("Copied %d bytes of sense data:",
+ sense_size);
+ 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;
+/*
+ ahc_print_path(ahc, scb);
+ printk("Dropping tag count to %d\n", dev->active);
+ */
+ 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
+ == AHC_LOCK_TAGS_COUNT) {
+ dev->maxtags = dev->active;
+ ahc_print_path(ahc, 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;
+ }
+ ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
+ ahc_set_scsi_status(scb, SCSI_STATUS_OK);
+ ahc_platform_set_tags(ahc, sdev, &devinfo,
+ (dev->flags & AHC_DEV_Q_BASIC)
+ ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
+ break;
+ }
+ /*
+ * Drop down to a single opening, and treat this
+ * as if the target returned BUSY SCSI status.
+ */
+ dev->openings = 1;
+ ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
+ ahc_platform_set_tags(ahc, sdev, &devinfo,
+ (dev->flags & AHC_DEV_Q_BASIC)
+ ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
+ break;
+ }
+ }
+}
+
+static void
+ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
+{
+ /*
+ * 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.
+ */
+ {
+ u_int new_status;
+
+ switch (ahc_cmd_get_transaction_status(cmd)) {
+ case CAM_REQ_INPROG:
+ case CAM_REQ_CMP:
+ case CAM_SCSI_STATUS_ERROR:
+ new_status = DID_OK;
+ 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;
+ break;
+ case CAM_CMD_TIMEOUT:
+ new_status = DID_TIME_OUT;
+ break;
+ case CAM_UA_ABORT:
+ case CAM_REQ_CMP_ERR:
+ case CAM_AUTOSENSE_FAIL:
+ case CAM_NO_HBA:
+ case CAM_DATA_RUN_ERR:
+ case CAM_UNEXP_BUSFREE:
+ 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;
+ }
+
+ ahc_cmd_set_transaction_status(cmd, new_status);
+ }
+
+ cmd->scsi_done(cmd);
+}
+
+static void
+ahc_linux_freeze_simq(struct ahc_softc *ahc)
+{
+ unsigned long s;
+
+ ahc_lock(ahc, &s);
+ ahc->platform_data->qfrozen++;
+ if (ahc->platform_data->qfrozen == 1) {
+ scsi_block_requests(ahc->platform_data->host);
+
+ /* XXX What about Twin channels? */
+ ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
+ CAM_LUN_WILDCARD, SCB_LIST_NULL,
+ ROLE_INITIATOR, CAM_REQUEUE_REQ);
+ }
+ ahc_unlock(ahc, &s);
+}
+
+static void
+ahc_linux_release_simq(struct ahc_softc *ahc)
+{
+ u_long s;
+ int unblock_reqs;
+
+ unblock_reqs = 0;
+ ahc_lock(ahc, &s);
+ if (ahc->platform_data->qfrozen > 0)
+ ahc->platform_data->qfrozen--;
+ if (ahc->platform_data->qfrozen == 0)
+ unblock_reqs = 1;
+ ahc_unlock(ahc, &s);
+ /*
+ * There is still a race here. The mid-layer
+ * should keep its own freeze count and use
+ * a bottom half handler to run the queues
+ * so we can unblock with our own lock held.
+ */
+ if (unblock_reqs)
+ scsi_unblock_requests(ahc->platform_data->host);
+}
+
+static int
+ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
+{
+ struct ahc_softc *ahc;
+ struct ahc_linux_device *dev;
+ struct scb *pending_scb;
+ u_int saved_scbptr;
+ u_int active_scb_index;
+ u_int last_phase;
+ u_int saved_scsiid;
+ u_int cdb_byte;
+ int retval;
+ int was_paused;
+ int paused;
+ int wait;
+ int disconnected;
+ unsigned long flags;
+
+ pending_scb = NULL;
+ paused = FALSE;
+ wait = FALSE;
+ ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
+
+ scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n",
+ flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
+
+ printk("CDB:");
+ for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
+ printk(" 0x%x", cmd->cmnd[cdb_byte]);
+ printk("\n");
+
+ ahc_lock(ahc, &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.
+ */
+ printk("%s:%d:%d:%d: Is not an active device\n",
+ ahc_name(ahc), cmd->device->channel, cmd->device->id,
+ (u8)cmd->device->lun);
+ retval = SUCCESS;
+ goto no_cmd;
+ }
+
+ if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
+ && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
+ cmd->device->channel + 'A',
+ (u8)cmd->device->lun,
+ CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
+ printk("%s:%d:%d:%d: Command found on untagged queue\n",
+ ahc_name(ahc), cmd->device->channel, cmd->device->id,
+ (u8)cmd->device->lun);
+ retval = SUCCESS;
+ goto done;
+ }
+
+ /*
+ * See if we can find a matching cmd in the pending list.
+ */
+ LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
+ if (pending_scb->io_ctx == cmd)
+ break;
+ }
+
+ if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
+
+ /* Any SCB for this device will do for a target reset */
+ LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
+ if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd),
+ scmd_channel(cmd) + 'A',
+ CAM_LUN_WILDCARD,
+ SCB_LIST_NULL, ROLE_INITIATOR))
+ 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 and that we didn't "just" miss
+ * an interrupt that would affect this cmd.
+ */
+ was_paused = ahc_is_paused(ahc);
+ ahc_pause_and_flushwork(ahc);
+ 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",
+ ahc_name(ahc), was_paused ? "" : "not ");
+ ahc_dump_card_state(ahc);
+
+ disconnected = TRUE;
+ if (flag == SCB_ABORT) {
+ if (ahc_search_qinfifo(ahc, 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",
+ ahc_name(ahc), cmd->device->channel,
+ cmd->device->id, (u8)cmd->device->lun);
+ retval = SUCCESS;
+ goto done;
+ }
+ } else if (ahc_search_qinfifo(ahc, cmd->device->id,
+ cmd->device->channel + 'A',
+ cmd->device->lun,
+ pending_scb->hscb->tag,
+ ROLE_INITIATOR, /*status*/0,
+ SEARCH_COUNT) > 0) {
+ disconnected = FALSE;
+ }
+
+ if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
+ struct scb *bus_scb;
+
+ bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
+ if (bus_scb == pending_scb)
+ disconnected = FALSE;
+ else if (flag != SCB_ABORT
+ && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
+ && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(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, is in the disconnected state, or we're hoping to find
+ * a command for the same target active on the bus to abuse to
+ * send a BDR. Queue the appropriate message based on which of
+ * these states we are in.
+ */
+ last_phase = ahc_inb(ahc, LASTPHASE);
+ saved_scbptr = ahc_inb(ahc, SCBPTR);
+ active_scb_index = ahc_inb(ahc, SCB_TAG);
+ saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
+ if (last_phase != P_BUSFREE
+ && (pending_scb->hscb->tag == active_scb_index
+ || (flag == SCB_DEVICE_RESET
+ && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) {
+
+ /*
+ * We're active on the bus, so assert ATN
+ * and hope that the target responds.
+ */
+ pending_scb = ahc_lookup_scb(ahc, active_scb_index);
+ pending_scb->flags |= SCB_RECOVERY_SCB|flag;
+ ahc_outb(ahc, MSG_OUT, HOST_MSG);
+ ahc_outb(ahc, 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.
+ * In either case (selection or reselection),
+ * we will now issue the approprate message
+ * to the timed-out device.
+ *
+ * Set the MK_MESSAGE control bit indicating
+ * that we desire to send a message. We
+ * also set the disconnected flag since
+ * in the paging case 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;
+ pending_scb->flags |= SCB_RECOVERY_SCB|flag;
+
+ /*
+ * Remove any cached copy of this SCB in the
+ * disconnected list in preparation for the
+ * queuing of our abort SCB. We use the
+ * same element in the SCB, SCB_NEXT, for
+ * both the qinfifo and the disconnected list.
+ */
+ ahc_search_disc_list(ahc, cmd->device->id,
+ cmd->device->channel + 'A',
+ cmd->device->lun, pending_scb->hscb->tag,
+ /*stop_on_first*/TRUE,
+ /*remove*/TRUE,
+ /*save_state*/FALSE);
+
+ /*
+ * In the non-paging case, 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.
+ */
+ if ((ahc->flags & AHC_PAGESCBS) == 0) {
+ ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
+ ahc_outb(ahc, SCB_CONTROL,
+ ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
+ }
+
+ /*
+ * Clear out any entries in the QINFIFO first
+ * so we are the next SCB for this target
+ * to run.
+ */
+ ahc_search_qinfifo(ahc, cmd->device->id,
+ cmd->device->channel + 'A',
+ cmd->device->lun, SCB_LIST_NULL,
+ ROLE_INITIATOR, CAM_REQUEUE_REQ,
+ SEARCH_COMPLETE);
+ ahc_qinfifo_requeue_tail(ahc, pending_scb);
+ ahc_outb(ahc, SCBPTR, saved_scbptr);
+ ahc_print_path(ahc, 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)
+ ahc_unpause(ahc);
+ if (wait) {
+ DECLARE_COMPLETION_ONSTACK(done);
+
+ ahc->platform_data->eh_done = &done;
+ ahc_unlock(ahc, &flags);
+
+ printk("Recovery code sleeping\n");
+ if (!wait_for_completion_timeout(&done, 5 * HZ)) {
+ ahc_lock(ahc, &flags);
+ ahc->platform_data->eh_done = NULL;
+ ahc_unlock(ahc, &flags);
+
+ printk("Timer Expired\n");
+ retval = FAILED;
+ }
+ printk("Recovery code awake\n");
+ } else
+ ahc_unlock(ahc, &flags);
+ return (retval);
+}
+
+void
+ahc_platform_dump_card_state(struct ahc_softc *ahc)
+{
+}
+
+static void ahc_linux_set_width(struct scsi_target *starget, int width)
+{
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+ struct ahc_devinfo devinfo;
+ unsigned long flags;
+
+ ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+ starget->channel + 'A', ROLE_INITIATOR);
+ ahc_lock(ahc, &flags);
+ ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
+ ahc_unlock(ahc, &flags);
+}
+
+static void ahc_linux_set_period(struct scsi_target *starget, int period)
+{
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+ struct ahc_tmode_tstate *tstate;
+ struct ahc_initiator_tinfo *tinfo
+ = ahc_fetch_transinfo(ahc,
+ starget->channel + 'A',
+ shost->this_id, starget->id, &tstate);
+ struct ahc_devinfo devinfo;
+ unsigned int ppr_options = tinfo->goal.ppr_options;
+ unsigned long flags;
+ unsigned long offset = tinfo->goal.offset;
+ const struct ahc_syncrate *syncrate;
+
+ if (offset == 0)
+ offset = MAX_OFFSET;
+
+ if (period < 9)
+ period = 9; /* 12.5ns is our minimum */
+ if (period == 9) {
+ if (spi_max_width(starget))
+ ppr_options |= MSG_EXT_PPR_DT_REQ;
+ else
+ /* need wide for DT and need DT for 12.5 ns */
+ period = 10;
+ }
+
+ ahc_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;
+ }
+
+ syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
+ ahc_lock(ahc, &flags);
+ ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
+ ppr_options, AHC_TRANS_GOAL, FALSE);
+ ahc_unlock(ahc, &flags);
+}
+
+static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
+{
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+ struct ahc_tmode_tstate *tstate;
+ struct ahc_initiator_tinfo *tinfo
+ = ahc_fetch_transinfo(ahc,
+ starget->channel + 'A',
+ shost->this_id, starget->id, &tstate);
+ struct ahc_devinfo devinfo;
+ unsigned int ppr_options = 0;
+ unsigned int period = 0;
+ unsigned long flags;
+ const struct ahc_syncrate *syncrate = NULL;
+
+ ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+ starget->channel + 'A', ROLE_INITIATOR);
+ if (offset != 0) {
+ syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
+ period = tinfo->goal.period;
+ ppr_options = tinfo->goal.ppr_options;
+ }
+ ahc_lock(ahc, &flags);
+ ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
+ ppr_options, AHC_TRANS_GOAL, FALSE);
+ ahc_unlock(ahc, &flags);
+}
+
+static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
+{
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+ struct ahc_tmode_tstate *tstate;
+ struct ahc_initiator_tinfo *tinfo
+ = ahc_fetch_transinfo(ahc,
+ starget->channel + 'A',
+ shost->this_id, starget->id, &tstate);
+ struct ahc_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;
+ const struct ahc_syncrate *syncrate;
+
+ if (dt && spi_max_width(starget)) {
+ ppr_options |= MSG_EXT_PPR_DT_REQ;
+ if (!width)
+ ahc_linux_set_width(starget, 1);
+ } else if (period == 9)
+ period = 10; /* if resetting DT, period must be >= 25ns */
+
+ ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+ starget->channel + 'A', ROLE_INITIATOR);
+ syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
+ ahc_lock(ahc, &flags);
+ ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
+ ppr_options, AHC_TRANS_GOAL, FALSE);
+ ahc_unlock(ahc, &flags);
+}
+
+#if 0
+/* FIXME: This code claims to support IU and QAS. However, the actual
+ * sequencer code and aic7xxx_core have no support for these parameters and
+ * will get into a bad state if they're negotiated. Do not enable this
+ * unless you know what you're doing */
+static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
+{
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+ struct ahc_tmode_tstate *tstate;
+ struct ahc_initiator_tinfo *tinfo
+ = ahc_fetch_transinfo(ahc,
+ starget->channel + 'A',
+ shost->this_id, starget->id, &tstate);
+ struct ahc_devinfo devinfo;
+ unsigned int ppr_options = tinfo->goal.ppr_options
+ & ~MSG_EXT_PPR_QAS_REQ;
+ unsigned int period = tinfo->goal.period;
+ unsigned long flags;
+ struct ahc_syncrate *syncrate;
+
+ if (qas)
+ ppr_options |= MSG_EXT_PPR_QAS_REQ;
+
+ ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+ starget->channel + 'A', ROLE_INITIATOR);
+ syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
+ ahc_lock(ahc, &flags);
+ ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
+ ppr_options, AHC_TRANS_GOAL, FALSE);
+ ahc_unlock(ahc, &flags);
+}
+
+static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
+{
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+ struct ahc_tmode_tstate *tstate;
+ struct ahc_initiator_tinfo *tinfo
+ = ahc_fetch_transinfo(ahc,
+ starget->channel + 'A',
+ shost->this_id, starget->id, &tstate);
+ struct ahc_devinfo devinfo;
+ unsigned int ppr_options = tinfo->goal.ppr_options
+ & ~MSG_EXT_PPR_IU_REQ;
+ unsigned int period = tinfo->goal.period;
+ unsigned long flags;
+ struct ahc_syncrate *syncrate;
+
+ if (iu)
+ ppr_options |= MSG_EXT_PPR_IU_REQ;
+
+ ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+ starget->channel + 'A', ROLE_INITIATOR);
+ syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
+ ahc_lock(ahc, &flags);
+ ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
+ ppr_options, AHC_TRANS_GOAL, FALSE);
+ ahc_unlock(ahc, &flags);
+}
+#endif
+
+static void ahc_linux_get_signalling(struct Scsi_Host *shost)
+{
+ struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
+ unsigned long flags;
+ u8 mode;
+
+ if (!(ahc->features & AHC_ULTRA2)) {
+ /* non-LVD chipset, may not have SBLKCTL reg */
+ spi_signalling(shost) =
+ ahc->features & AHC_HVD ?
+ SPI_SIGNAL_HVD :
+ SPI_SIGNAL_SE;
+ return;
+ }
+
+ ahc_lock(ahc, &flags);
+ ahc_pause(ahc);
+ mode = ahc_inb(ahc, SBLKCTL);
+ ahc_unpause(ahc);
+ ahc_unlock(ahc, &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 ahc_linux_transport_functions = {
+ .set_offset = ahc_linux_set_offset,
+ .show_offset = 1,
+ .set_period = ahc_linux_set_period,
+ .show_period = 1,
+ .set_width = ahc_linux_set_width,
+ .show_width = 1,
+ .set_dt = ahc_linux_set_dt,
+ .show_dt = 1,
+#if 0
+ .set_iu = ahc_linux_set_iu,
+ .show_iu = 1,
+ .set_qas = ahc_linux_set_qas,
+ .show_qas = 1,
+#endif
+ .get_signalling = ahc_linux_get_signalling,
+};
+
+
+
+static int __init
+ahc_linux_init(void)
+{
+ /*
+ * If we've been passed any parameters, process them now.
+ */
+ if (aic7xxx)
+ aic7xxx_setup(aic7xxx);
+
+ ahc_linux_transport_template =
+ spi_attach_transport(&ahc_linux_transport_functions);
+ if (!ahc_linux_transport_template)
+ return -ENODEV;
+
+ scsi_transport_reserve_device(ahc_linux_transport_template,
+ sizeof(struct ahc_linux_device));
+
+ ahc_linux_pci_init();
+ ahc_linux_eisa_init();
+ return 0;
+}
+
+static void
+ahc_linux_exit(void)
+{
+ ahc_linux_pci_exit();
+ ahc_linux_eisa_exit();
+ spi_release_transport(ahc_linux_transport_template);
+}
+
+module_init(ahc_linux_init);
+module_exit(ahc_linux_exit);
Code Review / kvmfornfv.git / blobdiff