patch-2.4.21 linux-2.4.21/drivers/scsi/aic79xx/aic79xx_osm.c
Next file: linux-2.4.21/drivers/scsi/aic79xx/aic79xx_osm.h
Previous file: linux-2.4.21/drivers/scsi/aic79xx/aic79xx_inline.h
Back to the patch index
Back to the overall index
- Lines: 5323
- Date:
2003-06-13 07:51:36.000000000 -0700
- Orig file:
linux-2.4.20/drivers/scsi/aic79xx/aic79xx_osm.c
- Orig date:
1969-12-31 16:00:00.000000000 -0800
diff -urN linux-2.4.20/drivers/scsi/aic79xx/aic79xx_osm.c linux-2.4.21/drivers/scsi/aic79xx/aic79xx_osm.c
@@ -0,0 +1,5322 @@
+/*
+ * Adaptec AIC79xx device driver for Linux.
+ *
+ * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#115 $
+ *
+ * --------------------------------------------------------------------------
+ * 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.
+ */
+
+/*
+ * This is the only file where module.h should
+ * embed module global version info.
+ */
+#define AHD_MODVERSION_FILE
+
+#include "aic79xx_osm.h"
+#include "aic79xx_inline.h"
+#include <scsi/scsicam.h>
+
+/*
+ * Include aiclib.c as part of our
+ * "module dependencies are hard" work around.
+ */
+#include "aiclib.c"
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
+#include <linux/init.h> /* __setup */
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+#include "sd.h" /* For geometry detection */
+#endif
+
+#include <linux/mm.h> /* For fetching system memory size */
+
+#define __KERNEL_SYSCALLS__
+
+#include <linux/unistd.h>
+static int errno;
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,0)
+/*
+ * Lock protecting manipulation of the ahd softc list.
+ */
+spinlock_t ahd_list_spinlock;
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0)
+struct proc_dir_entry proc_scsi_aic79xx = {
+ PROC_SCSI_AIC79XX, 7, "aic79xx",
+ S_IFDIR | S_IRUGO | S_IXUGO, 2,
+ 0, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL
+};
+#endif
+
+/*
+ * 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}
+};
+
+/*
+ * By default, read streaming is disabled. In theory,
+ * read streaming should enhance performance, but early
+ * U320 drive firmware actually performs slower with
+ * read streaming enabled.
+ */
+#ifdef CONFIG_AIC79XX_ENABLE_RD_STRM
+#define AIC79XX_CONFIGED_RD_STRM 0xFFFF
+#else
+#define AIC79XX_CONFIGED_RD_STRM 0
+#endif
+
+static uint16_t aic79xx_rd_strm_info[] =
+{
+ AIC79XX_CONFIGED_RD_STRM,
+ AIC79XX_CONFIGED_RD_STRM,
+ AIC79XX_CONFIGED_RD_STRM,
+ AIC79XX_CONFIGED_RD_STRM,
+ AIC79XX_CONFIGED_RD_STRM,
+ AIC79XX_CONFIGED_RD_STRM,
+ AIC79XX_CONFIGED_RD_STRM,
+ AIC79XX_CONFIGED_RD_STRM,
+ AIC79XX_CONFIGED_RD_STRM,
+ AIC79XX_CONFIGED_RD_STRM,
+ AIC79XX_CONFIGED_RD_STRM,
+ AIC79XX_CONFIGED_RD_STRM,
+ AIC79XX_CONFIGED_RD_STRM,
+ AIC79XX_CONFIGED_RD_STRM,
+ AIC79XX_CONFIGED_RD_STRM,
+ AIC79XX_CONFIGED_RD_STRM
+};
+
+/*
+ * DV option:
+ *
+ * positive value = DV Enabled
+ * zero = DV Disabled
+ * negative value = DV Default for adapter type/seeprom
+ */
+#ifdef CONFIG_AIC79XX_DV_SETTING
+#define AIC79XX_CONFIGED_DV CONFIG_AIC79XX_DV_SETTING
+#else
+#define AIC79XX_CONFIGED_DV -1
+#endif
+
+static int8_t aic79xx_dv_settings[] =
+{
+ AIC79XX_CONFIGED_DV,
+ AIC79XX_CONFIGED_DV,
+ AIC79XX_CONFIGED_DV,
+ AIC79XX_CONFIGED_DV,
+ AIC79XX_CONFIGED_DV,
+ AIC79XX_CONFIGED_DV,
+ AIC79XX_CONFIGED_DV,
+ AIC79XX_CONFIGED_DV,
+ AIC79XX_CONFIGED_DV,
+ AIC79XX_CONFIGED_DV,
+ AIC79XX_CONFIGED_DV,
+ AIC79XX_CONFIGED_DV,
+ AIC79XX_CONFIGED_DV,
+ AIC79XX_CONFIGED_DV,
+ AIC79XX_CONFIGED_DV,
+ AIC79XX_CONFIGED_DV
+};
+
+/*
+ * The I/O cell on the chip is very configurable in respect to its analog
+ * characteristics. Set the defaults here; they can be overriden with
+ * the proper insmod parameters.
+ */
+struct ahd_linux_iocell_opts
+{
+ uint8_t precomp;
+ uint8_t slewrate;
+ uint8_t amplitude;
+};
+#define AIC79XX_DEFAULT_PRECOMP 0xFF
+#define AIC79XX_DEFAULT_SLEWRATE 0xFF
+#define AIC79XX_DEFAULT_AMPLITUDE 0xFF
+#define AIC79XX_DEFAULT_IOOPTS \
+{ \
+ AIC79XX_DEFAULT_PRECOMP, \
+ AIC79XX_DEFAULT_SLEWRATE, \
+ AIC79XX_DEFAULT_AMPLITUDE \
+}
+#define AIC79XX_PRECOMP_INDEX 0
+#define AIC79XX_SLEWRATE_INDEX 1
+#define AIC79XX_AMPLITUDE_INDEX 2
+static struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
+{
+ 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;
+
+/*
+ * Certain PCI motherboards will scan PCI devices from highest to lowest,
+ * others scan from lowest to highest, and they tend to do all kinds of
+ * strange things when they come into contact with PCI bridge chips. The
+ * net result of all this is that the PCI card that is actually used to boot
+ * the machine is very hard to detect. Most motherboards go from lowest
+ * PCI slot number to highest, and the first SCSI controller found is the
+ * one you boot from. The only exceptions to this are when a controller
+ * has its BIOS disabled. So, we by default sort all of our SCSI controllers
+ * from lowest PCI slot number to highest PCI slot number. We also force
+ * all controllers with their BIOS disabled to the end of the list. This
+ * works on *almost* all computers. Where it doesn't work, we have this
+ * option. Setting this option to non-0 will reverse the order of the sort
+ * to highest first, then lowest, but will still leave cards with their BIOS
+ * disabled at the very end. That should fix everyone up unless there are
+ * really strange cirumstances.
+ */
+static int aic79xx_reverse_scan = 0;
+
+/*
+ * 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 = 0;
+
+/*
+ * 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
+ * -1 = Normal polarity pci parity checking
+ * 1 = reverse polarity pci parity checking
+ *
+ * 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 int 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.
+ */
+int aic79xx_allow_memio = 1;
+
+/*
+ * aic79xx_detect() has been run, so register all device arrivals
+ * immediately with the system rather than deferring to the sorted
+ * attachment performed by aic79xx_detect().
+ */
+int aic79xx_detect_complete;
+
+/*
+ * 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 int aic79xx_seltime = 0x00;
+
+/*
+ * 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.
+ */
+int aic79xx_periodic_otag;
+
+/*
+ * Module information and settable options.
+ */
+#ifdef MODULE
+static char *aic79xx = NULL;
+/*
+ * Just in case someone uses commas to separate items on the insmod
+ * command line, we define a dummy buffer here to avoid having insmod
+ * write wild stuff into our code segment
+ */
+static char dummy_buffer[60] = "Please don't trounce on me insmod!!\n";
+
+MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
+MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver");
+#ifdef MODULE_LICENSE
+MODULE_LICENSE("Dual BSD/GPL");
+#endif
+MODULE_PARM(aic79xx, "s");
+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 Supress 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"
+" reverse_scan Sort PCI devices highest Bus/Slot to lowest\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"
+" rd_strm:<rd_strm_masks> Set per-target read streaming setting.\n"
+" dv:<dv_settings> Set per-controller Domain Validation Setting.\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"
+"\n"
+" Sample /etc/modules.conf line:\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='\"verbose.tag_info:{{}.{}.{..10}}.seltime:1\"'\n"
+"\n"
+" Sample /etc/modules.conf line:\n"
+" Change Read Streaming for Controller's 2 and 3\n"
+"\n"
+" options aic79xx='\"rd_strm:{..0xFFF0.0xC0F0}\"'");
+#endif
+
+static void ahd_linux_handle_scsi_status(struct ahd_softc *,
+ struct ahd_linux_device *,
+ struct scb *);
+static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
+ Scsi_Cmnd *cmd);
+static void ahd_linux_filter_inquiry(struct ahd_softc *ahd,
+ struct ahd_devinfo *devinfo);
+static void ahd_linux_dev_timed_unfreeze(u_long arg);
+static void ahd_linux_sem_timeout(u_long arg);
+static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
+static void ahd_linux_thread_run_complete_queue(struct ahd_softc *ahd);
+static void ahd_linux_start_dv(struct ahd_softc *ahd);
+static void ahd_linux_dv_timeout(struct scsi_cmnd *cmd);
+static int ahd_linux_dv_thread(void *data);
+static void ahd_linux_dv_target(struct ahd_softc *ahd, u_int target);
+static void ahd_linux_dv_transition(struct ahd_softc *ahd,
+ struct scsi_cmnd *cmd,
+ struct ahd_devinfo *devinfo,
+ struct ahd_linux_target *targ);
+static void ahd_linux_dv_fill_cmd(struct ahd_softc *ahd,
+ struct scsi_cmnd *cmd,
+ struct ahd_devinfo *devinfo);
+static void ahd_linux_dv_inq(struct ahd_softc *ahd,
+ struct scsi_cmnd *cmd,
+ struct ahd_devinfo *devinfo,
+ struct ahd_linux_target *targ,
+ u_int request_length);
+static void ahd_linux_dv_tur(struct ahd_softc *ahd,
+ struct scsi_cmnd *cmd,
+ struct ahd_devinfo *devinfo);
+static void ahd_linux_dv_rebd(struct ahd_softc *ahd,
+ struct scsi_cmnd *cmd,
+ struct ahd_devinfo *devinfo,
+ struct ahd_linux_target *targ);
+static void ahd_linux_dv_web(struct ahd_softc *ahd,
+ struct scsi_cmnd *cmd,
+ struct ahd_devinfo *devinfo,
+ struct ahd_linux_target *targ);
+static void ahd_linux_dv_reb(struct ahd_softc *ahd,
+ struct scsi_cmnd *cmd,
+ struct ahd_devinfo *devinfo,
+ struct ahd_linux_target *targ);
+static void ahd_linux_dv_su(struct ahd_softc *ahd,
+ struct scsi_cmnd *cmd,
+ struct ahd_devinfo *devinfo,
+ struct ahd_linux_target *targ);
+static __inline int
+ ahd_linux_dv_fallback(struct ahd_softc *ahd,
+ struct ahd_devinfo *devinfo);
+static int ahd_linux_fallback(struct ahd_softc *ahd,
+ struct ahd_devinfo *devinfo);
+static __inline int ahd_linux_dv_fallback(struct ahd_softc *ahd,
+ struct ahd_devinfo *devinfo);
+static void ahd_linux_dv_complete(Scsi_Cmnd *cmd);
+static void ahd_linux_generate_dv_pattern(struct ahd_linux_target *targ);
+static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
+ struct ahd_devinfo *devinfo);
+static u_int ahd_linux_user_dv_setting(struct ahd_softc *ahd);
+static void ahd_linux_device_queue_depth(struct ahd_softc *ahd,
+ struct ahd_linux_device *dev);
+static struct ahd_linux_target* ahd_linux_alloc_target(struct ahd_softc*,
+ u_int, u_int);
+static void ahd_linux_free_target(struct ahd_softc*,
+ struct ahd_linux_target*);
+static struct ahd_linux_device* ahd_linux_alloc_device(struct ahd_softc*,
+ struct ahd_linux_target*,
+ u_int);
+static void ahd_linux_free_device(struct ahd_softc*,
+ struct ahd_linux_device*);
+static void ahd_linux_run_device_queue(struct ahd_softc*,
+ struct ahd_linux_device*);
+static void ahd_linux_setup_tag_info(char *p, char *end, char *s);
+static void ahd_linux_setup_tag_info_global(char *p);
+static void ahd_linux_setup_rd_strm_info(char *p, char *end, char *s);
+static void ahd_linux_setup_dv(char *p, char *end, char *s);
+static void ahd_linux_setup_iocell_info(char *p, char *end, char *s, int index);
+static int ahd_linux_next_unit(void);
+static void ahd_runq_tasklet(unsigned long data);
+static int ahd_linux_halt(struct notifier_block *nb, u_long event, void *buf);
+static int aic79xx_setup(char *c);
+
+/****************************** Inlines ***************************************/
+static __inline void ahd_schedule_completeq(struct ahd_softc *ahd,
+ struct ahd_cmd *acmd);
+static __inline void ahd_schedule_runq(struct ahd_softc *ahd);
+static __inline void ahd_setup_runq_tasklet(struct ahd_softc *ahd);
+static __inline void ahd_teardown_runq_tasklet(struct ahd_softc *ahd);
+static __inline struct ahd_linux_device*
+ ahd_linux_get_device(struct ahd_softc *ahd, u_int channel,
+ u_int target, u_int lun, int alloc);
+static struct ahd_cmd *ahd_linux_run_complete_queue(struct ahd_softc *ahd,
+ struct ahd_cmd *acmd);
+static __inline void ahd_linux_check_device_queue(struct ahd_softc *ahd,
+ struct ahd_linux_device *dev);
+static __inline struct ahd_linux_device *
+ ahd_linux_next_device_to_run(struct ahd_softc *ahd);
+static __inline void ahd_linux_run_device_queues(struct ahd_softc *ahd);
+static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
+
+static __inline int ahd_linux_map_seg(struct ahd_softc *ahd, struct scb *scb,
+ struct ahd_dma_seg *sg,
+ bus_addr_t addr, bus_size_t len);
+
+static __inline void
+ahd_schedule_completeq(struct ahd_softc *ahd, struct ahd_cmd *acmd)
+{
+ while (acmd != NULL) {
+ struct ahd_completeq *completeq;
+ struct ahd_cmd *list_cmd;
+ struct ahd_cmd *next_cmd;
+
+ next_cmd = TAILQ_NEXT(acmd, acmd_links.tqe);
+ completeq = &ahd->platform_data->completeq;
+ list_cmd = TAILQ_FIRST(completeq);
+ while (list_cmd != NULL
+ && acmd_scsi_cmd(list_cmd).serial_number
+ < acmd_scsi_cmd(acmd).serial_number)
+ list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe);
+ if (list_cmd != NULL)
+ TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe);
+ else
+ TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe);
+ acmd = next_cmd;
+ }
+ if ((ahd->platform_data->flags & AHD_RUN_CMPLT_Q_TIMER) == 0) {
+ ahd->platform_data->flags |= AHD_RUN_CMPLT_Q_TIMER;
+ ahd->platform_data->completeq_timer.expires = jiffies;
+ add_timer(&ahd->platform_data->completeq_timer);
+ }
+}
+
+static __inline void
+ahd_schedule_runq(struct ahd_softc *ahd)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ tasklet_schedule(&ahd->platform_data->runq_tasklet);
+#else
+ /*
+ * Tasklets are not available, so run inline.
+ */
+ ahd_runq_tasklet((unsigned long)ahd);
+#endif
+}
+
+static __inline
+void ahd_setup_runq_tasklet(struct ahd_softc *ahd)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ tasklet_init(&ahd->platform_data->runq_tasklet, ahd_runq_tasklet,
+ (unsigned long)ahd);
+#endif
+}
+
+static __inline void
+ahd_teardown_runq_tasklet(struct ahd_softc *ahd)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ tasklet_kill(&ahd->platform_data->runq_tasklet);
+#endif
+}
+
+static __inline struct ahd_linux_device*
+ahd_linux_get_device(struct ahd_softc *ahd, u_int channel, u_int target,
+ u_int lun, int alloc)
+{
+ struct ahd_linux_target *targ;
+ struct ahd_linux_device *dev;
+ u_int target_offset;
+
+ target_offset = target;
+ if (channel != 0)
+ target_offset += 8;
+ targ = ahd->platform_data->targets[target_offset];
+ if (targ == NULL) {
+ if (alloc != 0) {
+ targ = ahd_linux_alloc_target(ahd, channel, target);
+ if (targ == NULL)
+ return (NULL);
+ } else
+ return (NULL);
+ }
+ dev = targ->devices[lun];
+ if (dev == NULL && alloc != 0)
+ dev = ahd_linux_alloc_device(ahd, targ, lun);
+ return (dev);
+}
+
+#define AHD_LINUX_MAX_RETURNED_ERRORS 4
+static struct ahd_cmd *
+ahd_linux_run_complete_queue(struct ahd_softc *ahd, struct ahd_cmd *acmd)
+{
+ u_long done_flags;
+ int with_errors;
+
+ ahd_done_lock(ahd, &done_flags);
+ with_errors = 0;
+ while (acmd != NULL) {
+ Scsi_Cmnd *cmd;
+
+ cmd = &acmd_scsi_cmd(acmd);
+ acmd = TAILQ_NEXT(acmd, acmd_links.tqe);
+ cmd->host_scribble = NULL;
+ if (ahd_cmd_get_transaction_status(cmd) != DID_OK
+ || (cmd->result & 0xFF) != SCSI_STATUS_OK)
+ with_errors++;
+
+ cmd->scsi_done(cmd);
+
+ if (with_errors > AHD_LINUX_MAX_RETURNED_ERRORS) {
+ /*
+ * Linux uses stack recursion to requeue
+ * commands that need to be retried. Avoid
+ * blowing out the stack by "spoon feeding"
+ * commands that completed with error back
+ * the operating system in case they are going
+ * to be retried. "ick"
+ */
+ break;
+ }
+ }
+ ahd_done_unlock(ahd, &done_flags);
+ return (acmd);
+}
+
+static __inline void
+ahd_linux_check_device_queue(struct ahd_softc *ahd,
+ struct ahd_linux_device *dev)
+{
+ if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) != 0
+ && dev->active == 0) {
+ dev->flags &= ~AHD_DEV_FREEZE_TIL_EMPTY;
+ dev->qfrozen--;
+ }
+
+ if (TAILQ_FIRST(&dev->busyq) == NULL
+ || dev->openings == 0 || dev->qfrozen != 0)
+ return;
+
+ ahd_linux_run_device_queue(ahd, dev);
+}
+
+static __inline struct ahd_linux_device *
+ahd_linux_next_device_to_run(struct ahd_softc *ahd)
+{
+
+ if ((ahd->flags & AHD_RESOURCE_SHORTAGE) != 0
+ || (ahd->platform_data->qfrozen != 0
+ && AHD_DV_SIMQ_FROZEN(ahd) == 0))
+ return (NULL);
+ return (TAILQ_FIRST(&ahd->platform_data->device_runq));
+}
+
+static __inline void
+ahd_linux_run_device_queues(struct ahd_softc *ahd)
+{
+ struct ahd_linux_device *dev;
+
+ while ((dev = ahd_linux_next_device_to_run(ahd)) != NULL) {
+ TAILQ_REMOVE(&ahd->platform_data->device_runq, dev, links);
+ dev->flags &= ~AHD_DEV_ON_RUN_LIST;
+ ahd_linux_check_device_queue(ahd, dev);
+ }
+}
+
+static __inline void
+ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
+{
+ Scsi_Cmnd *cmd;
+ int direction;
+
+ cmd = scb->io_ctx;
+ direction = scsi_to_pci_dma_dir(cmd->sc_data_direction);
+ ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
+ if (cmd->use_sg != 0) {
+ struct scatterlist *sg;
+
+ sg = (struct scatterlist *)cmd->request_buffer;
+ pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction);
+ } else if (cmd->request_bufflen != 0) {
+ pci_unmap_single(ahd->dev_softc,
+ scb->platform_data->buf_busaddr,
+ cmd->request_bufflen, direction);
+ }
+}
+
+static __inline int
+ahd_linux_map_seg(struct ahd_softc *ahd, struct scb *scb,
+ struct ahd_dma_seg *sg, bus_addr_t addr, bus_size_t len)
+{
+ int consumed;
+
+ if ((scb->sg_count + 1) > AHD_NSEG)
+ panic("Too few segs for dma mapping. "
+ "Increase AHD_NSEG\n");
+
+ consumed = 1;
+ sg->addr = ahd_htole32(addr & 0xFFFFFFFF);
+ scb->platform_data->xfer_len += len;
+ if (sizeof(bus_addr_t) > 4
+ && (ahd->flags & AHD_39BIT_ADDRESSING) != 0) {
+ /*
+ * Due to DAC restrictions, we can't
+ * cross a 4GB boundary.
+ */
+ if ((addr ^ (addr + len - 1)) & ~0xFFFFFFFF) {
+ struct ahd_dma_seg *next_sg;
+ uint32_t next_len;
+
+ printf("Crossed Seg\n");
+ if ((scb->sg_count + 2) > AHD_NSEG)
+ panic("Too few segs for dma mapping. "
+ "Increase AHD_NSEG\n");
+
+ consumed++;
+ next_sg = sg + 1;
+ next_sg->addr = 0;
+ next_len = 0x100000000 - (addr & 0xFFFFFFFF);
+ len -= next_len;
+ next_len |= ((addr >> 8) + 0x1000000) & 0x7F000000;
+ next_sg->len = ahd_htole32(next_len);
+ }
+ len |= (addr >> 8) & 0x7F000000;
+ }
+ sg->len = ahd_htole32(len);
+ return (consumed);
+}
+
+/******************************** Macros **************************************/
+#define BUILD_SCSIID(ahd, cmd) \
+ ((((cmd)->device->id << TID_SHIFT) & TID) | (ahd)->our_id)
+
+/************************ Host template entry points *************************/
+static int ahd_linux_detect(Scsi_Host_Template *);
+static int ahd_linux_release(struct Scsi_Host *);
+static const char *ahd_linux_info(struct Scsi_Host *);
+static int ahd_linux_queue(Scsi_Cmnd *, void (*)(Scsi_Cmnd *));
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+static int ahd_linux_slave_alloc(Scsi_Device *);
+static int ahd_linux_slave_configure(Scsi_Device *);
+static void ahd_linux_slave_destroy(Scsi_Device *);
+static int ahd_linux_biosparam(struct scsi_device*,
+ struct block_device*, sector_t, int[]);
+#else
+static void ahd_linux_select_queue_depth(struct Scsi_Host *host,
+ Scsi_Device *scsi_devs);
+static int ahd_linux_biosparam(Disk *, kdev_t, int[]);
+#endif
+static int ahd_linux_bus_reset(Scsi_Cmnd *);
+static int ahd_linux_dev_reset(Scsi_Cmnd *);
+static int ahd_linux_abort(Scsi_Cmnd *);
+
+/*
+ * Try to detect an Adaptec 79XX controller.
+ */
+static int
+ahd_linux_detect(Scsi_Host_Template *template)
+{
+ struct ahd_softc *ahd;
+ int found;
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ /*
+ * It is a bug that the upper layer takes
+ * this lock just prior to calling us.
+ */
+ spin_unlock_irq(&io_request_lock);
+#endif
+
+ /*
+ * Sanity checking of Linux SCSI data structures so
+ * that some of our hacks^H^H^H^H^Hassumptions aren't
+ * violated.
+ */
+ if (offsetof(struct ahd_cmd_internal, end)
+ > offsetof(struct scsi_cmnd, host_scribble)) {
+ printf("ahd_linux_detect: SCSI data structures changed.\n");
+ printf("ahd_linux_detect: Unable to attach\n");
+ return (0);
+ }
+#ifdef MODULE
+ /*
+ * If we've been passed any parameters, process them now.
+ */
+ if (aic79xx)
+ aic79xx_setup(aic79xx);
+ if (dummy_buffer[0] != 'P')
+ printk(KERN_WARNING
+"aic79xx: Please read the file /usr/src/linux/drivers/scsi/README.aic79xx\n"
+"aic79xx: to see the proper way to specify options to the aic79xx module\n"
+"aic79xx: Specifically, don't use any commas when passing arguments to\n"
+"aic79xx: insmod or else it might trash certain memory areas.\n");
+#endif
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,0)
+ template->proc_name = "aic79xx";
+#else
+ template->proc_dir = &proc_scsi_aic79xx;
+#endif
+
+ /*
+ * Initialize our softc list lock prior to
+ * probing for any adapters.
+ */
+ ahd_list_lockinit();
+
+#ifdef CONFIG_PCI
+ ahd_linux_pci_probe(template);
+#endif
+
+ /*
+ * Register with the SCSI layer all
+ * controllers we've found.
+ */
+ found = 0;
+ TAILQ_FOREACH(ahd, &ahd_tailq, links) {
+
+ if (ahd_linux_register_host(ahd, template) == 0)
+ found++;
+ }
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ spin_lock_irq(&io_request_lock);
+#endif
+ aic79xx_detect_complete++;
+ return (found);
+}
+
+/*
+ * Free the passed in Scsi_Host memory structures prior to unloading the
+ * module.
+ */
+static int
+ahd_linux_release(struct Scsi_Host * host)
+{
+ struct ahd_softc *ahd;
+ u_long l;
+
+ ahd_list_lock(&l);
+ if (host != NULL) {
+
+ /*
+ * We should be able to just perform
+ * the free directly, but check our
+ * list for extra sanity.
+ */
+ ahd = ahd_find_softc(*(struct ahd_softc **)host->hostdata);
+ if (ahd != NULL) {
+ u_long s;
+
+ ahd_lock(ahd, &s);
+ ahd_intr_enable(ahd, FALSE);
+ ahd_unlock(ahd, &s);
+ ahd_free(ahd);
+ }
+ }
+ ahd_list_unlock(&l);
+ return (0);
+}
+
+/*
+ * 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 ");
+ strcat(bp, AIC79XX_DRIVER_VERSION);
+ strcat(bp, "\n");
+ strcat(bp, " <");
+ strcat(bp, ahd->description);
+ strcat(bp, ">\n");
+ strcat(bp, " ");
+ ahd_controller_info(ahd, ahd_info);
+ strcat(bp, ahd_info);
+ strcat(bp, "\n");
+
+ return (bp);
+}
+
+/*
+ * Queue an SCB to the controller.
+ */
+static int
+ahd_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *))
+{
+ struct ahd_softc *ahd;
+ struct ahd_linux_device *dev;
+ u_long flags;
+
+ ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
+
+ /*
+ * Save the callback on completion function.
+ */
+ cmd->scsi_done = scsi_done;
+
+ ahd_midlayer_entrypoint_lock(ahd, &flags);
+
+ /*
+ * Close the race of a command that was in the process of
+ * being queued to us just as our simq was frozen. Let
+ * DV commands through so long as we are only frozen to
+ * perform DV.
+ */
+ if (ahd->platform_data->qfrozen != 0
+ && AHD_DV_CMD(cmd) == 0) {
+
+ ahd_cmd_set_transaction_status(cmd, CAM_REQUEUE_REQ);
+ ahd_linux_queue_cmd_complete(ahd, cmd);
+ ahd_schedule_completeq(ahd, NULL);
+ ahd_midlayer_entrypoint_unlock(ahd, &flags);
+ return (0);
+ }
+ dev = ahd_linux_get_device(ahd, cmd->device->channel,
+ cmd->device->id, cmd->device->lun,
+ /*alloc*/TRUE);
+ if (dev == NULL) {
+ ahd_midlayer_entrypoint_unlock(ahd, &flags);
+ printf("aic79xx_linux_queue: Unable to allocate device!\n");
+ return (-ENOMEM);
+ }
+ if (cmd->cmd_len > MAX_CDB_LEN)
+ return (-EINVAL);
+ cmd->result = CAM_REQ_INPROG << 16;
+ TAILQ_INSERT_TAIL(&dev->busyq, (struct ahd_cmd *)cmd, acmd_links.tqe);
+ if ((dev->flags & AHD_DEV_ON_RUN_LIST) == 0) {
+ TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq, dev, links);
+ dev->flags |= AHD_DEV_ON_RUN_LIST;
+ ahd_linux_run_device_queues(ahd);
+ }
+ ahd_midlayer_entrypoint_unlock(ahd, &flags);
+ return (0);
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+static int
+ahd_linux_slave_alloc(Scsi_Device *device)
+{
+ struct ahd_softc *ahd;
+
+ ahd = *((struct ahd_softc **)device->host->hostdata);
+ if (bootverbose)
+ printf("%s: Slave Alloc %d\n", ahd_name(ahd), device->id);
+ return (0);
+}
+
+static int
+ahd_linux_slave_configure(Scsi_Device *device)
+{
+ struct ahd_softc *ahd;
+ struct ahd_linux_device *dev;
+ u_long flags;
+
+ ahd = *((struct ahd_softc **)device->host->hostdata);
+ if (bootverbose)
+ printf("%s: Slave Configure %d\n", ahd_name(ahd), device->id);
+ ahd_midlayer_entrypoint_lock(ahd, &flags);
+ /*
+ * Since Linux has attached to the device, configure
+ * it so we don't free and allocate the device
+ * structure on every command.
+ */
+ dev = ahd_linux_get_device(ahd, device->channel,
+ device->id, device->lun,
+ /*alloc*/TRUE);
+ if (dev != NULL) {
+ dev->flags &= ~AHD_DEV_UNCONFIGURED;
+ dev->flags |= AHD_DEV_SLAVE_CONFIGURED;
+ dev->scsi_device = device;
+ ahd_linux_device_queue_depth(ahd, dev);
+ }
+ ahd_midlayer_entrypoint_unlock(ahd, &flags);
+ return (0);
+}
+
+static void
+ahd_linux_slave_destroy(Scsi_Device *device)
+{
+ struct ahd_softc *ahd;
+ struct ahd_linux_device *dev;
+ u_long flags;
+
+ ahd = *((struct ahd_softc **)device->host->hostdata);
+ if (bootverbose)
+ printf("%s: Slave Destroy %d\n", ahd_name(ahd), device->id);
+ ahd_midlayer_entrypoint_lock(ahd, &flags);
+ dev = ahd_linux_get_device(ahd, device->channel,
+ device->id, device->lun,
+ /*alloc*/FALSE);
+
+ /*
+ * Filter out "silly" deletions of real devices by only
+ * deleting devices that have had slave_configure()
+ * called on them. All other devices that have not
+ * been configured will automatically be deleted by
+ * the refcounting process.
+ */
+ if (dev != NULL
+ && (dev->flags & AHD_DEV_SLAVE_CONFIGURED) != 0) {
+ dev->flags |= AHD_DEV_UNCONFIGURED;
+ if (TAILQ_EMPTY(&dev->busyq)
+ && dev->active == 0)
+ ahd_linux_free_device(ahd, dev);
+ }
+ ahd_midlayer_entrypoint_unlock(ahd, &flags);
+}
+#else
+/*
+ * Sets the queue depth for each SCSI device hanging
+ * off the input host adapter.
+ */
+static void
+ahd_linux_select_queue_depth(struct Scsi_Host * host,
+ Scsi_Device * scsi_devs)
+{
+ Scsi_Device *device;
+ struct ahd_softc *ahd;
+ u_long flags;
+ int scbnum;
+
+ ahd = *((struct ahd_softc **)host->hostdata);
+ ahd_midlayer_entrypoint_lock(ahd, &flags);
+ scbnum = 0;
+ for (device = scsi_devs; device != NULL; device = device->next) {
+
+ if (device->host == host) {
+ struct ahd_linux_device *dev;
+
+ /*
+ * Since Linux has attached to the device, configure
+ * it so we don't free and allocate the device
+ * structure on every command.
+ */
+ dev = ahd_linux_get_device(ahd, device->channel,
+ device->id, device->lun,
+ /*alloc*/TRUE);
+ if (dev != NULL) {
+ dev->flags &= ~AHD_DEV_UNCONFIGURED;
+ dev->scsi_device = device;
+ ahd_linux_device_queue_depth(ahd, dev);
+ device->queue_depth = dev->openings
+ + dev->active;
+ if ((dev->flags & (AHD_DEV_Q_BASIC
+ | AHD_DEV_Q_TAGGED)) == 0) {
+ /*
+ * 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.
+ */
+ device->queue_depth = 2;
+ }
+ }
+ }
+ }
+ ahd_midlayer_entrypoint_unlock(ahd, &flags);
+}
+#endif
+
+/*
+ * Return the disk geometry for the given SCSI device.
+ */
+static int
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
+ sector_t capacity, int geom[])
+{
+ uint8_t *bh;
+#else
+ahd_linux_biosparam(Disk *disk, kdev_t dev, int geom[])
+{
+ struct scsi_device *sdev = disk->device;
+ u_long capacity = disk->capacity;
+ struct buffer_head *bh;
+#endif
+ int heads;
+ int sectors;
+ int cylinders;
+ int ret;
+ int extended;
+ struct ahd_softc *ahd;
+
+ ahd = *((struct ahd_softc **)sdev->host->hostdata);
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ bh = scsi_bios_ptable(bdev);
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,17)
+ bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, block_size(dev));
+#else
+ bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, 1024);
+#endif
+
+ if (bh) {
+ ret = scsi_partsize(bh, capacity,
+ &geom[2], &geom[0], &geom[1]);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ kfree(bh);
+#else
+ brelse(bh);
+#endif
+ 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);
+}
+
+/*
+ * Abort the current SCSI command(s).
+ */
+static int
+ahd_linux_abort(Scsi_Cmnd *cmd)
+{
+ struct ahd_softc *ahd;
+ struct ahd_cmd *acmd;
+ struct ahd_cmd *list_acmd;
+ struct ahd_linux_device *dev;
+ struct scb *pending_scb;
+ u_long s;
+ u_int saved_scbptr;
+ u_int active_scbptr;
+ u_int last_phase;
+ int retval;
+ int paused;
+ int wait;
+ int disconnected;
+ ahd_mode_state saved_modes;
+
+ pending_scb = NULL;
+ paused = FALSE;
+ wait = FALSE;
+ ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
+ acmd = (struct ahd_cmd *)cmd;
+
+ printf("%s:%d:%d:%d: Attempting to abort cmd %p\n",
+ ahd_name(ahd), cmd->device->channel, cmd->device->id,
+ cmd->device->lun, cmd);
+
+ /*
+ * In all versions of Linux, we have to work around
+ * a major flaw in how the mid-layer is locked down
+ * if we are to sleep successfully in our error handler
+ * while allowing our interrupt handler to run. Since
+ * the midlayer acquires either the io_request_lock or
+ * our lock prior to calling us, we must use the
+ * spin_unlock_irq() method for unlocking our lock.
+ * This will force interrupts to be enabled on the
+ * current CPU. Since the EH thread should not have
+ * been running with CPU interrupts disabled other than
+ * by acquiring either the io_request_lock or our own
+ * lock, this *should* be safe.
+ */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ spin_unlock_irq(&io_request_lock);
+#endif
+ ahd_midlayer_entrypoint_lock(ahd, &s);
+
+ /*
+ * 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 = ahd_linux_get_device(ahd, cmd->device->channel,
+ cmd->device->id, cmd->device->lun,
+ /*alloc*/FALSE);
+
+ if (dev == NULL) {
+ /*
+ * No target device for this command exists,
+ * so we must not still own the command.
+ */
+ printf("%s:%d:%d:%d: Is not an active device\n",
+ ahd_name(ahd), cmd->device->channel, cmd->device->id,
+ cmd->device->lun);
+ retval = SUCCESS;
+ goto no_cmd;
+ }
+
+ TAILQ_FOREACH(list_acmd, &dev->busyq, acmd_links.tqe) {
+ if (list_acmd == acmd)
+ break;
+ }
+
+ if (list_acmd != NULL) {
+ printf("%s:%d:%d:%d: Command found on device queue\n",
+ ahd_name(ahd), cmd->device->channel, cmd->device->id,
+ cmd->device->lun);
+ TAILQ_REMOVE(&dev->busyq, list_acmd, acmd_links.tqe);
+ cmd->result = DID_ABORT << 16;
+ ahd_linux_queue_cmd_complete(ahd, cmd);
+ retval = SUCCESS;
+ goto done;
+ }
+
+ /*
+ * See if we can find a matching cmd in the pending list.
+ */
+ LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
+ if (pending_scb->io_ctx == cmd)
+ break;
+ }
+
+ if (pending_scb == NULL) {
+ printf("%s:%d:%d:%d: Command not found\n",
+ ahd_name(ahd), cmd->device->channel, cmd->device->id,
+ cmd->device->lun);
+ 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.
+ */
+ ahd_pause_and_flushwork(ahd);
+ paused = TRUE;
+
+ if ((pending_scb->flags & SCB_ACTIVE) == 0) {
+ printf("%s:%d:%d:%d: Command already completed\n",
+ ahd_name(ahd), cmd->device->channel, cmd->device->id,
+ cmd->device->lun);
+ goto no_cmd;
+ }
+
+ 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) {
+ printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
+ ahd_name(ahd), cmd->device->channel, cmd->device->id,
+ 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.
+ */
+ if (last_phase != P_BUSFREE
+ && pending_scb->hscb->tag == 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);
+ printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
+ ahd_name(ahd), cmd->device->channel,
+ cmd->device->id, cmd->device->lun);
+ 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, pending_scb->hscb->tag);
+ 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 reslection, 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);
+ printf("Device is disconnected, re-queuing SCB\n");
+ wait = TRUE;
+ } else {
+ printf("%s:%d:%d:%d: Unable to deliver message\n",
+ ahd_name(ahd), cmd->device->channel,
+ cmd->device->id, cmd->device->lun);
+ 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) {
+ struct timer_list timer;
+ int ret;
+
+ ahd->platform_data->flags |= AHD_UP_EH_SEMAPHORE;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ ahd_unlock(ahd, &s);
+#else
+ spin_unlock_irq(ahd->platform_data->host->host_lock);
+#endif
+ init_timer(&timer);
+ timer.data = (u_long)ahd;
+ timer.expires = jiffies + (5 * HZ);
+ timer.function = ahd_linux_sem_timeout;
+ add_timer(&timer);
+ printf("Recovery code sleeping\n");
+ down(&ahd->platform_data->eh_sem);
+ printf("Recovery code awake\n");
+ ret = del_timer(&timer);
+ if (ret == 0) {
+ printf("Timer Expired\n");
+ retval = FAILED;
+ }
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ ahd_lock(ahd, &s);
+#else
+ spin_lock_irq(ahd->platform_data->host->host_lock);
+#endif
+ }
+ acmd = TAILQ_FIRST(&ahd->platform_data->completeq);
+ TAILQ_INIT(&ahd->platform_data->completeq);
+ ahd_midlayer_entrypoint_unlock(ahd, &s);
+ if (acmd != NULL) {
+ acmd = ahd_linux_run_complete_queue(ahd, acmd);
+ if (acmd != NULL) {
+ ahd_midlayer_entrypoint_lock(ahd, &s);
+ ahd_schedule_completeq(ahd, acmd);
+ ahd_midlayer_entrypoint_unlock(ahd, &s);
+ }
+ }
+ ahd_schedule_runq(ahd);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ spin_lock_irq(&io_request_lock);
+#endif
+ return (retval);
+}
+
+
+static void
+ahd_linux_dev_reset_complete(Scsi_Cmnd *cmd)
+{
+ free(cmd, M_DEVBUF);
+}
+
+/*
+ * Attempt to send a target reset message to the device that timed out.
+ */
+static int
+ahd_linux_dev_reset(Scsi_Cmnd *cmd)
+{
+ struct ahd_softc *ahd;
+ struct scsi_cmnd *recovery_cmd;
+ struct ahd_linux_device *dev;
+ struct ahd_initiator_tinfo *tinfo;
+ struct ahd_tmode_tstate *tstate;
+ struct scb *scb;
+ struct hardware_scb *hscb;
+ struct ahd_cmd *acmd;
+ u_long s;
+ struct timer_list timer;
+ int retval;
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ spin_unlock_irq(&io_request_lock);
+#endif
+ ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
+ recovery_cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK);
+ memset(recovery_cmd, 0, sizeof(struct scsi_cmnd));
+ recovery_cmd->device = cmd->device;
+ recovery_cmd->scsi_done = ahd_linux_dev_reset_complete;
+#if AHD_DEBUG
+ if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
+ printf("%s:%d:%d:%d: Device reset called for cmd %p\n",
+ ahd_name(ahd), cmd->device->channel, cmd->device->id,
+ cmd->device->lun, cmd);
+#endif
+ ahd_midlayer_entrypoint_lock(ahd, &s);
+
+ dev = ahd_linux_get_device(ahd, cmd->device->channel, cmd->device->id,
+ cmd->device->lun, /*alloc*/FALSE);
+ if (dev == NULL) {
+ ahd_midlayer_entrypoint_unlock(ahd, &s);
+ return (FAILED);
+ }
+ if ((scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX)) == NULL) {
+ ahd_midlayer_entrypoint_unlock(ahd, &s);
+ return (FAILED);
+ }
+ tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
+ cmd->device->id, &tstate);
+ recovery_cmd->result = CAM_REQ_INPROG << 16;
+ recovery_cmd->host_scribble = (char *)scb;
+ scb->io_ctx = recovery_cmd;
+ scb->platform_data->dev = dev;
+ scb->sg_count = 0;
+ ahd_set_residual(scb, 0);
+ ahd_set_sense_residual(scb, 0);
+ hscb = scb->hscb;
+ hscb->control = 0;
+ hscb->scsiid = BUILD_SCSIID(ahd, cmd);
+ hscb->lun = cmd->lun;
+ hscb->cdb_len = 0;
+ hscb->task_management = SIU_TASKMGMT_LUN_RESET;
+ scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
+ if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
+ scb->flags |= SCB_PACKETIZED;
+ } else {
+ hscb->control |= MK_MESSAGE;
+ }
+ dev->openings--;
+ dev->active++;
+ dev->commands_issued++;
+ LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
+ ahd_queue_scb(ahd, scb);
+
+ ahd->platform_data->flags |= AHD_UP_EH_SEMAPHORE;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ ahd_unlock(ahd, &s);
+#else
+ spin_unlock_irq(ahd->platform_data->host->host_lock);
+#endif
+ init_timer(&timer);
+ timer.data = (u_long)ahd;
+ timer.expires = jiffies + (5 * HZ);
+ timer.function = ahd_linux_sem_timeout;
+ add_timer(&timer);
+ printf("Recovery code sleeping\n");
+ down(&ahd->platform_data->eh_sem);
+ printf("Recovery code awake\n");
+ retval = SUCCESS;
+ if (del_timer(&timer) == 0) {
+ printf("Timer Expired\n");
+ retval = FAILED;
+ }
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ ahd_lock(ahd, &s);
+#else
+ spin_lock_irq(ahd->platform_data->host->host_lock);
+#endif
+ acmd = TAILQ_FIRST(&ahd->platform_data->completeq);
+ TAILQ_INIT(&ahd->platform_data->completeq);
+ ahd_midlayer_entrypoint_unlock(ahd, &s);
+ if (acmd != NULL) {
+ acmd = ahd_linux_run_complete_queue(ahd, acmd);
+ if (acmd != NULL) {
+ ahd_midlayer_entrypoint_lock(ahd, &s);
+ ahd_schedule_completeq(ahd, acmd);
+ ahd_midlayer_entrypoint_unlock(ahd, &s);
+ }
+ }
+ ahd_schedule_runq(ahd);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ spin_lock_irq(&io_request_lock);
+#endif
+ printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
+ return (retval);
+}
+
+/*
+ * Reset the SCSI bus.
+ */
+static int
+ahd_linux_bus_reset(Scsi_Cmnd *cmd)
+{
+ struct ahd_softc *ahd;
+ struct ahd_cmd *acmd;
+ u_long s;
+ int found;
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ spin_unlock_irq(&io_request_lock);
+#endif
+ ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
+#ifdef AHD_DEBUG
+ if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
+ printf("%s: Bus reset called for cmd %p\n",
+ ahd_name(ahd), cmd);
+#endif
+ ahd_midlayer_entrypoint_lock(ahd, &s);
+ found = ahd_reset_channel(ahd, cmd->channel + 'A',
+ /*initiate reset*/TRUE);
+ acmd = TAILQ_FIRST(&ahd->platform_data->completeq);
+ TAILQ_INIT(&ahd->platform_data->completeq);
+ ahd_midlayer_entrypoint_unlock(ahd, &s);
+ if (bootverbose)
+ printf("%s: SCSI bus reset delivered. "
+ "%d SCBs aborted.\n", ahd_name(ahd), found);
+
+ if (acmd != NULL) {
+ acmd = ahd_linux_run_complete_queue(ahd, acmd);
+ if (acmd != NULL) {
+ ahd_midlayer_entrypoint_lock(ahd, &s);
+ ahd_schedule_completeq(ahd, acmd);
+ ahd_midlayer_entrypoint_unlock(ahd, &s);
+ }
+ }
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ spin_lock_irq(&io_request_lock);
+#endif
+ return (SUCCESS);
+}
+
+Scsi_Host_Template aic79xx_driver_template = {
+ .proc_info = ahd_linux_proc_info,
+ .detect = ahd_linux_detect,
+ .release = ahd_linux_release,
+ .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,
+ .sg_tablesize = AHD_NSEG,
+ .cmd_per_lun = 2,
+ .use_clustering = ENABLE_CLUSTERING,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,7)
+ /*
+ * We can only map 16MB per-SG
+ * so create a sector limit of
+ * "16MB" in 2K sectors.
+ */
+ .max_sectors = 8192,
+#endif
+#if defined CONFIG_HIGHIO || LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,18)
+/* Assume RedHat Distribution with its different HIGHIO conventions. */
+ .can_dma_32 = 1,
+ .single_sg_okay = 1,
+#else
+ .highmem_io = 1,
+#endif
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ .name = "aic79xx",
+ .slave_alloc = ahd_linux_slave_alloc,
+ .slave_configure = ahd_linux_slave_configure,
+ .slave_destroy = ahd_linux_slave_destroy,
+#else
+ .select_queue_depths = ahd_linux_select_queue_depth,
+ .use_new_eh_code = 1,
+#endif
+};
+
+#define driver_template aic79xx_driver_template
+#include "scsi_module.c"
+/**************************** Tasklet Handler *********************************/
+
+static void
+ahd_runq_tasklet(unsigned long data)
+{
+ struct ahd_softc* ahd;
+ struct ahd_linux_device *dev;
+ u_long flags;
+
+ ahd = (struct ahd_softc *)data;
+ ahd_lock(ahd, &flags);
+ while ((dev = ahd_linux_next_device_to_run(ahd)) != NULL) {
+
+ TAILQ_REMOVE(&ahd->platform_data->device_runq, dev, links);
+ dev->flags &= ~AHD_DEV_ON_RUN_LIST;
+ ahd_linux_check_device_queue(ahd, dev);
+ /* Yeild to our interrupt handler */
+ ahd_unlock(ahd, &flags);
+ ahd_lock(ahd, &flags);
+ }
+ ahd_unlock(ahd, &flags);
+}
+
+/************************ Shutdown/halt/reboot hook ***************************/
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+
+static struct notifier_block ahd_linux_notifier = {
+ ahd_linux_halt, NULL, 0
+};
+
+static int ahd_linux_halt(struct notifier_block *nb, u_long event, void *buf)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ struct ahd_softc *ahd;
+
+ /*
+ * In 2.5.X, this is called prior to the filesystems
+ * being synced and the SCSI layer being properly
+ * shutdown. A different API is required there,
+ * but the device hooks for this don't quite look
+ * right.
+ */
+ if (event == SYS_DOWN || event == SYS_HALT) {
+ TAILQ_FOREACH(ahd, &ahd_tailq, links) {
+ ahd_shutdown(ahd);
+ }
+ }
+#endif
+ return (NOTIFY_OK);
+}
+
+/******************************** Bus DMA *************************************/
+int
+ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
+ bus_size_t alignment, bus_size_t boundary,
+ bus_addr_t lowaddr, bus_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 = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
+ 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)
+{
+ free(dmat, M_DEVBUF);
+}
+
+int
+ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
+ int flags, bus_dmamap_t *mapp)
+{
+ bus_dmamap_t map;
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
+ map = malloc(sizeof(*map), M_DEVBUF, M_NOWAIT);
+ if (map == NULL)
+ return (ENOMEM);
+ /*
+ * Although we can dma data above 4GB, our
+ * "consistent" memory is below 4GB for
+ * space efficiency reasons (only need a 4byte
+ * address). For this reason, we have to reset
+ * our dma mask when doing allocations.
+ */
+ if (ahd->dev_softc != NULL)
+ ahd_pci_set_dma_mask(ahd->dev_softc, 0xFFFFFFFF);
+ *vaddr = pci_alloc_consistent(ahd->dev_softc,
+ dmat->maxsize, &map->bus_addr);
+ if (ahd->dev_softc != NULL)
+ ahd_pci_set_dma_mask(ahd->dev_softc,
+ ahd->platform_data->hw_dma_mask);
+#else /* LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0) */
+ /*
+ * At least in 2.2.14, malloc is a slab allocator so all
+ * allocations are aligned. We assume for these kernel versions
+ * that all allocations will be bellow 4Gig, physically contiguous,
+ * and accessable via DMA by the controller.
+ */
+ map = NULL; /* No additional information to store */
+ *vaddr = malloc(dmat->maxsize, M_DEVBUF, M_NOWAIT);
+#endif
+ if (*vaddr == NULL)
+ return (ENOMEM);
+ *mapp = map;
+ return(0);
+}
+
+void
+ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
+ void* vaddr, bus_dmamap_t map)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
+ pci_free_consistent(ahd->dev_softc, dmat->maxsize,
+ vaddr, map->bus_addr);
+#else
+ free(vaddr, M_DEVBUF);
+#endif
+}
+
+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;
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
+ stack_sg.ds_addr = map->bus_addr;
+#else
+#define VIRT_TO_BUS(a) (uint32_t)virt_to_bus((void *)(a))
+ stack_sg.ds_addr = VIRT_TO_BUS(buf);
+#endif
+ 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)
+{
+ /*
+ * The map may is NULL in our < 2.3.X implementation.
+ */
+ if (map != NULL)
+ free(map, M_DEVBUF);
+}
+
+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 ***************************/
+int
+ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd)
+{
+ int value;
+ char primary_channel;
+
+ /*
+ * Under Linux, cards are ordered as follows:
+ * 1) PCI devices with BIOS enabled sorted by bus/slot/func.
+ * 2) All remaining PCI devices sorted by bus/slot/func.
+ */
+ value = (lahd->flags & AHD_BIOS_ENABLED)
+ - (rahd->flags & AHD_BIOS_ENABLED);
+ if (value != 0)
+ /* Controllers with BIOS enabled have a *higher* priority */
+ return (-value);
+
+ /* Still equal. Sort by bus/slot/func. */
+ if (aic79xx_reverse_scan != 0)
+ value = ahd_get_pci_bus(rahd->dev_softc)
+ - ahd_get_pci_bus(lahd->dev_softc);
+ else
+ value = ahd_get_pci_bus(lahd->dev_softc)
+ - ahd_get_pci_bus(rahd->dev_softc);
+ if (value != 0)
+ return (value);
+ if (aic79xx_reverse_scan != 0)
+ value = ahd_get_pci_slot(rahd->dev_softc)
+ - ahd_get_pci_slot(lahd->dev_softc);
+ else
+ value = ahd_get_pci_slot(lahd->dev_softc)
+ - ahd_get_pci_slot(rahd->dev_softc);
+ if (value != 0)
+ return (value);
+
+ /*
+ * On multi-function devices, the user can choose
+ * to have function 1 probed before function 0.
+ * Give whichever channel is the primary channel
+ * the lowest priority.
+ */
+ primary_channel = (lahd->flags & AHD_PRIMARY_CHANNEL) + 'A';
+ value = 1;
+ if (lahd->channel == primary_channel)
+ value = -1;
+ return (value);
+}
+
+static void
+ahd_linux_setup_tag_info(char *p, char *end, char *s)
+{
+ char *base;
+ char *tok;
+ char *tok_end;
+ char *tok_end2;
+ int i;
+ int instance;
+ int targ;
+ int done;
+ char tok_list[] = {'.', ',', '{', '}', '\0'};
+
+ if (*p != ':')
+ return;
+
+ instance = -1;
+ targ = -1;
+ done = FALSE;
+ base = p;
+ /* Forward us just past the ':' */
+ tok = base + 1;
+ tok_end = strchr(tok, '\0');
+ if (tok_end < end)
+ *tok_end = ',';
+ while (!done) {
+ switch (*tok) {
+ case '{':
+ if (instance == -1)
+ instance = 0;
+ else if (targ == -1)
+ targ = 0;
+ tok++;
+ break;
+ case '}':
+ if (targ != -1)
+ targ = -1;
+ else if (instance != -1)
+ instance = -1;
+ tok++;
+ break;
+ case ',':
+ case '.':
+ if (instance == -1)
+ done = TRUE;
+ else if (targ >= 0)
+ targ++;
+ else if (instance >= 0)
+ instance++;
+ if ((targ >= AHD_NUM_TARGETS) ||
+ (instance >= NUM_ELEMENTS(aic79xx_tag_info)))
+ done = TRUE;
+ tok++;
+ if (!done) {
+ base = tok;
+ }
+ break;
+ case '\0':
+ done = TRUE;
+ break;
+ default:
+ done = TRUE;
+ tok_end = strchr(tok, '\0');
+ for (i = 0; tok_list[i]; i++) {
+ tok_end2 = strchr(tok, tok_list[i]);
+ if ((tok_end2) && (tok_end2 < tok_end)) {
+ tok_end = tok_end2;
+ done = FALSE;
+ }
+ }
+ if ((instance >= 0) && (targ >= 0)
+ && (instance < NUM_ELEMENTS(aic79xx_tag_info))
+ && (targ < AHD_NUM_TARGETS)) {
+ aic79xx_tag_info[instance].tag_commands[targ] =
+ simple_strtoul(tok, NULL, 0) & 0xff;
+ }
+ tok = tok_end;
+ break;
+ }
+ }
+ while ((p != base) && (p != NULL))
+ p = strsep(&s, ",.");
+}
+
+static void
+ahd_linux_setup_rd_strm_info(char *p, char *end, char *s)
+{
+ char *base;
+ char *tok;
+ char *tok_end;
+ char *tok_end2;
+ int i;
+ int instance;
+ int done;
+ char tok_list[] = {'.', ',', '{', '}', '\0'};
+
+ if (*p != ':')
+ return;
+
+ instance = -1;
+ done = FALSE;
+ base = p;
+ /* Forward us just past the ':' */
+ tok = base + 1;
+ tok_end = strchr(tok, '\0');
+ if (tok_end < end)
+ *tok_end = ',';
+ while (!done) {
+ switch (*tok) {
+ case '{':
+ if (instance == -1)
+ instance = 0;
+ tok++;
+ break;
+ case '}':
+ if (instance != -1)
+ instance = -1;
+ tok++;
+ break;
+ case ',':
+ case '.':
+ if (instance == -1)
+ done = TRUE;
+ else if (instance >= 0)
+ instance++;
+ if (instance >= NUM_ELEMENTS(aic79xx_rd_strm_info))
+ done = TRUE;
+ tok++;
+ if (!done) {
+ base = tok;
+ }
+ break;
+ case '\0':
+ done = TRUE;
+ break;
+ default:
+ done = TRUE;
+ tok_end = strchr(tok, '\0');
+ for (i = 0; tok_list[i]; i++) {
+ tok_end2 = strchr(tok, tok_list[i]);
+ if ((tok_end2) && (tok_end2 < tok_end)) {
+ tok_end = tok_end2;
+ done = FALSE;
+ }
+ }
+ if ((instance >= 0)
+ && (instance < NUM_ELEMENTS(aic79xx_rd_strm_info))) {
+ aic79xx_rd_strm_info[instance] =
+ simple_strtoul(tok, NULL, 0) & 0xffff;
+ }
+ tok = tok_end;
+ break;
+ }
+ }
+ while ((p != base) && (p != NULL))
+ p = strsep(&s, ",.");
+}
+
+static void
+ahd_linux_setup_dv(char *p, char *end, char *s)
+{
+ char *base;
+ char *tok;
+ char *tok_end;
+ char *tok_end2;
+ int i;
+ int instance;
+ int done;
+ char tok_list[] = {'.', ',', '{', '}', '\0'};
+
+ if (*p != ':')
+ return;
+
+ instance = -1;
+ done = FALSE;
+ base = p;
+ /* Forward us just past the ':' */
+ tok = base + 1;
+ tok_end = strchr(tok, '\0');
+ if (tok_end < end)
+ *tok_end = ',';
+ while (!done) {
+ switch (*tok) {
+ case '{':
+ if (instance == -1)
+ instance = 0;
+ tok++;
+ break;
+ case '}':
+ if (instance != -1)
+ instance = -1;
+ tok++;
+ break;
+ case ',':
+ case '.':
+ if (instance == -1)
+ done = TRUE;
+ else if (instance >= 0)
+ instance++;
+ if (instance >= NUM_ELEMENTS(aic79xx_dv_settings))
+ done = TRUE;
+ tok++;
+ if (!done) {
+ base = tok;
+ }
+ break;
+ case '\0':
+ done = TRUE;
+ break;
+ default:
+ done = TRUE;
+ tok_end = strchr(tok, '\0');
+ for (i = 0; tok_list[i]; i++) {
+ tok_end2 = strchr(tok, tok_list[i]);
+ if ((tok_end2) && (tok_end2 < tok_end)) {
+ tok_end = tok_end2;
+ done = FALSE;
+ }
+ }
+ if ((instance >= 0)
+ && (instance < NUM_ELEMENTS(aic79xx_dv_settings))) {
+ aic79xx_dv_settings[instance] =
+ simple_strtol(tok, NULL, 0);
+ }
+ tok = tok_end;
+ break;
+ }
+ }
+ while ((p != base) && (p != NULL))
+ p = strsep(&s, ",.");
+}
+
+static void
+ahd_linux_setup_iocell_info(char *p, char *end, char *s, int index)
+{
+ char *base;
+ char *tok;
+ char *tok_end;
+ char *tok_end2;
+ uint8_t *iocell_info;
+ int i;
+ int instance;
+ int done;
+ char tok_list[] = {'.', ',', '{', '}', '\0'};
+
+ if (*p != ':')
+ return;
+
+ instance = -1;
+ done = FALSE;
+ base = p;
+ /* Forward us just past the ':' */
+ tok = base + 1;
+ tok_end = strchr(tok, '\0');
+ if (tok_end < end)
+ *tok_end = ',';
+ while (!done) {
+ switch (*tok) {
+ case '{':
+ if (instance == -1)
+ instance = 0;
+ tok++;
+ break;
+ case '}':
+ if (instance != -1)
+ instance = -1;
+ tok++;
+ break;
+ case ',':
+ case '.':
+ if (instance == -1)
+ done = TRUE;
+ else if (instance >= 0)
+ instance++;
+ if (instance >= NUM_ELEMENTS(aic79xx_iocell_info))
+ done = TRUE;
+ tok++;
+ if (!done) {
+ base = tok;
+ }
+ break;
+ case '\0':
+ done = TRUE;
+ break;
+ default:
+ done = TRUE;
+ tok_end = strchr(tok, '\0');
+ for (i = 0; tok_list[i]; i++) {
+ tok_end2 = strchr(tok, tok_list[i]);
+ if ((tok_end2) && (tok_end2 < tok_end)) {
+ tok_end = tok_end2;
+ done = FALSE;
+ }
+ }
+ if ((instance >= 0)
+ && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
+ iocell_info =
+ (uint8_t*)&aic79xx_iocell_info[instance];
+ iocell_info[index] =
+ simple_strtoul(tok, NULL, 0) & 0xffff;
+ }
+ tok = tok_end;
+ break;
+ }
+ }
+ while ((p != base) && (p != NULL))
+ p = strsep(&s, ",.");
+}
+
+static void
+ahd_linux_setup_tag_info_global(char *p)
+{
+ int tags, i, j;
+
+ tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
+ printf("Setting Global Tags= %d\n", tags);
+
+ for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
+ for (j = 0; j < AHD_NUM_TARGETS; j++) {
+ aic79xx_tag_info[i].tag_commands[j] = tags;
+ }
+ }
+}
+
+/*
+ * 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 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
+ { "reverse_scan", &aic79xx_reverse_scan },
+ { "periodic_otag", &aic79xx_periodic_otag },
+ { "pci_parity", &aic79xx_pci_parity },
+ { "seltime", &aic79xx_seltime },
+ { "tag_info", NULL },
+ { "global_tag_depth", NULL},
+ { "rd_strm", NULL },
+ { "dv", NULL },
+ { "slewrate", NULL },
+ { "precomp", NULL },
+ { "amplitude", NULL },
+ };
+
+ end = strchr(s, '\0');
+
+ while ((p = strsep(&s, ",.")) != NULL) {
+ if (*p == '\0')
+ continue;
+ for (i = 0; i < NUM_ELEMENTS(options); i++) {
+ n = strlen(options[i].name);
+
+ if (strncmp(options[i].name, p, n) != 0)
+ continue;
+
+ if (!strncmp(p, "global_tag_depth", n)) {
+ ahd_linux_setup_tag_info_global(p + n);
+ } else if (!strncmp(p, "tag_info", n)) {
+ ahd_linux_setup_tag_info(p + n, end, s);
+ } else if (strncmp(p, "rd_strm", n) == 0) {
+ ahd_linux_setup_rd_strm_info(p + n, end, s);
+ } else if (strncmp(p, "dv", n) == 0) {
+ ahd_linux_setup_dv(p + n, end, s);
+ } else if (strncmp(p, "slewrate", n) == 0) {
+ ahd_linux_setup_iocell_info(p + n, end, s,
+ AIC79XX_SLEWRATE_INDEX);
+ } else if (strncmp(p, "precomp", n) == 0) {
+ ahd_linux_setup_iocell_info(p + n, end, s,
+ AIC79XX_PRECOMP_INDEX);
+ } else if (strncmp(p, "amplitude", n) == 0) {
+ ahd_linux_setup_iocell_info(p + n, end, s,
+ 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) = ~(*(options[i].flag));
+ }
+ break;
+ }
+ }
+ return 1;
+}
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,0)
+__setup("aic79xx=", aic79xx_setup);
+#endif
+
+int aic79xx_verbose;
+
+int
+ahd_linux_register_host(struct ahd_softc *ahd, Scsi_Host_Template *template)
+{
+ char buf[80];
+ struct Scsi_Host *host;
+ char *new_name;
+ u_long s;
+ u_long target;
+
+ template->name = ahd->description;
+ host = scsi_register(template, sizeof(struct ahd_softc *));
+ if (host == NULL)
+ return (ENOMEM);
+
+ *((struct ahd_softc **)host->hostdata) = ahd;
+ ahd_lock(ahd, &s);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ scsi_assign_lock(host, &ahd->platform_data->spin_lock);
+#endif
+ 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;
+ ahd_set_unit(ahd, ahd_linux_next_unit());
+ sprintf(buf, "scsi%d", host->host_no);
+ new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
+ if (new_name != NULL) {
+ strcpy(new_name, buf);
+ ahd_set_name(ahd, new_name);
+ }
+ host->unique_id = ahd->unit;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,4)
+ scsi_set_pci_device(host, ahd->dev_softc);
+#endif
+ ahd_linux_initialize_scsi_bus(ahd);
+ ahd_unlock(ahd, &s);
+ ahd->platform_data->dv_pid = kernel_thread(ahd_linux_dv_thread, ahd, 0);
+ ahd_lock(ahd, &s);
+ if (ahd->platform_data->dv_pid < 0) {
+ printf("%s: Failed to create DV thread, error= %d\n",
+ ahd_name(ahd), ahd->platform_data->dv_pid);
+ return (-ahd->platform_data->dv_pid);
+ }
+ /*
+ * Initially allocate *all* of our linux target objects
+ * so that the DV thread will scan them all in parallel
+ * just after driver initialization. Any device that
+ * does not exist will have its target object destroyed
+ * by the selection timeout handler. In the case of a
+ * device that appears after the initial DV scan, async
+ * negotiation will occur for the first command, and DV
+ * will comence should that first command be successful.
+ */
+ for (target = 0; target < host->max_id; target++)
+ ahd_linux_alloc_target(ahd, 0, target);
+ ahd_intr_enable(ahd, TRUE);
+ ahd_linux_start_dv(ahd);
+ ahd_unlock(ahd, &s);
+ return (0);
+}
+
+uint64_t
+ahd_linux_get_memsize()
+{
+ struct sysinfo si;
+
+ si_meminfo(&si);
+ return ((uint64_t)si.totalram << PAGE_SHIFT);
+}
+
+/*
+ * Find the smallest available unit number to use
+ * for a new device. We don't just use a static
+ * count to handle the "repeated hot-(un)plug"
+ * scenario.
+ */
+static int
+ahd_linux_next_unit()
+{
+ struct ahd_softc *ahd;
+ int unit;
+
+ unit = 0;
+retry:
+ TAILQ_FOREACH(ahd, &ahd_tailq, links) {
+ if (ahd->unit == unit) {
+ unit++;
+ goto retry;
+ }
+ }
+ return (unit);
+}
+
+/*
+ * 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;
+
+ 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;
+
+ /*
+ * 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);
+ }
+ /* Give the bus some time to recover */
+ if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
+ ahd_freeze_simq(ahd);
+ init_timer(&ahd->platform_data->reset_timer);
+ ahd->platform_data->reset_timer.data = (u_long)ahd;
+ ahd->platform_data->reset_timer.expires =
+ jiffies + (AIC79XX_RESET_DELAY * HZ)/1000;
+ ahd->platform_data->reset_timer.function =
+ (ahd_linux_callback_t *)ahd_release_simq;
+ add_timer(&ahd->platform_data->reset_timer);
+ }
+}
+
+int
+ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
+{
+ ahd->platform_data =
+ malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
+ if (ahd->platform_data == NULL)
+ return (ENOMEM);
+ memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
+ TAILQ_INIT(&ahd->platform_data->completeq);
+ TAILQ_INIT(&ahd->platform_data->device_runq);
+ ahd->platform_data->irq = AHD_LINUX_NOIRQ;
+ ahd->platform_data->hw_dma_mask = 0xFFFFFFFF;
+ ahd_lockinit(ahd);
+ ahd_done_lockinit(ahd);
+ init_timer(&ahd->platform_data->completeq_timer);
+ ahd->platform_data->completeq_timer.data = (u_long)ahd;
+ ahd->platform_data->completeq_timer.function =
+ (ahd_linux_callback_t *)ahd_linux_thread_run_complete_queue;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
+ init_MUTEX_LOCKED(&ahd->platform_data->eh_sem);
+ init_MUTEX_LOCKED(&ahd->platform_data->dv_sem);
+ init_MUTEX_LOCKED(&ahd->platform_data->dv_cmd_sem);
+#else
+ ahd->platform_data->eh_sem = MUTEX_LOCKED;
+ ahd->platform_data->dv_sem = MUTEX_LOCKED;
+ ahd->platform_data->dv_cmd_sem = MUTEX_LOCKED;
+#endif
+ ahd_setup_runq_tasklet(ahd);
+ ahd->seltime = (aic79xx_seltime & 0x3) << 4;
+ if (TAILQ_EMPTY(&ahd_tailq))
+ register_reboot_notifier(&ahd_linux_notifier);
+ return (0);
+}
+
+void
+ahd_platform_free(struct ahd_softc *ahd)
+{
+ struct ahd_linux_target *targ;
+ struct ahd_linux_device *dev;
+ u_long s;
+ int i, j;
+
+ if (ahd->platform_data != NULL) {
+ /* Kill the DV kthread */
+ if (ahd->platform_data->dv_pid != 0) {
+ ahd_lock(ahd, &s);
+ ahd->platform_data->flags |= AHD_DV_SHUTDOWN;
+ ahd_unlock(ahd, &s);
+ up(&ahd->platform_data->dv_sem);
+ do {
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ printf("%s: Waiting for DV thread to "
+ "exit\n", ahd_name(ahd));
+ }
+#endif
+ } while (waitpid(ahd->platform_data->dv_pid, NULL,
+ __WCLONE) == -ERESTARTSYS);
+ }
+ ahd_teardown_runq_tasklet(ahd);
+ if (ahd->platform_data->host != NULL)
+ scsi_unregister(ahd->platform_data->host);
+
+ /* destroy all of the device and target objects */
+ for (i = 0; i < AHD_NUM_TARGETS; i++) {
+ targ = ahd->platform_data->targets[i];
+ if (targ != NULL) {
+ for (j = 0; j < AHD_NUM_LUNS; j++) {
+ if (targ->devices[j] != NULL) {
+ dev = targ->devices[j];
+ ahd_linux_free_device(ahd, dev);
+ }
+ if (ahd->platform_data->targets[i] ==
+ NULL)
+ break;
+ }
+ }
+ }
+
+ 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) {
+ u_long base_addr;
+
+ base_addr = (u_long)ahd->bshs[0].maddr;
+ base_addr &= PAGE_MASK;
+ iounmap((void *)base_addr);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ release_mem_region(ahd->platform_data->mem_busaddr,
+ 0x1000);
+#endif
+ }
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ /* XXX Need an instance detach in the PCI code */
+ if (ahd->dev_softc != NULL)
+ ahd->dev_softc->driver = NULL;
+#endif
+ free(ahd->platform_data, M_DEVBUF);
+ }
+ if (TAILQ_EMPTY(&ahd_tailq)) {
+ unregister_reboot_notifier(&ahd_linux_notifier);
+#ifdef CONFIG_PCI
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ pci_unregister_driver(&aic79xx_pci_driver);
+#endif
+#endif
+ }
+}
+
+void
+ahd_platform_init(struct ahd_softc *ahd)
+{
+ /*
+ * Lookup and commit any modified IO Cell options.
+ */
+ if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) {
+ 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 ahd_devinfo *devinfo,
+ ahd_queue_alg alg)
+{
+ struct ahd_linux_device *dev;
+ int was_queuing;
+ int now_queuing;
+
+ dev = ahd_linux_get_device(ahd, devinfo->channel - 'A',
+ devinfo->target,
+ devinfo->lun, /*alloc*/FALSE);
+ if (dev == NULL)
+ return;
+ was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
+ now_queuing = alg != AHD_QUEUE_NONE;
+ 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 agressively 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;
+ }
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ if (dev->scsi_device != NULL) {
+ switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
+ case AHD_DEV_Q_BASIC:
+ scsi_adjust_queue_depth(dev->scsi_device,
+ MSG_SIMPLE_TASK,
+ dev->openings + dev->active);
+ break;
+ case AHD_DEV_Q_TAGGED:
+ scsi_adjust_queue_depth(dev->scsi_device,
+ MSG_ORDERED_TASK,
+ 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_adjust_queue_depth(dev->scsi_device,
+ /*NON-TAGGED*/0,
+ /*queue depth*/2);
+ break;
+ }
+ }
+#endif
+}
+
+int
+ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
+ int lun, u_int tag, role_t role, uint32_t status)
+{
+ int targ;
+ int maxtarg;
+ int maxlun;
+ int clun;
+ int count;
+
+ if (tag != SCB_LIST_NULL)
+ return (0);
+
+ targ = 0;
+ if (target != CAM_TARGET_WILDCARD) {
+ targ = target;
+ maxtarg = targ + 1;
+ } else {
+ maxtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
+ }
+ clun = 0;
+ if (lun != CAM_LUN_WILDCARD) {
+ clun = lun;
+ maxlun = clun + 1;
+ } else {
+ maxlun = AHD_NUM_LUNS;
+ }
+
+ count = 0;
+ for (; targ < maxtarg; targ++) {
+
+ for (; clun < maxlun; clun++) {
+ struct ahd_linux_device *dev;
+ struct ahd_busyq *busyq;
+ struct ahd_cmd *acmd;
+
+ dev = ahd_linux_get_device(ahd, /*chan*/0, targ,
+ clun, /*alloc*/FALSE);
+ if (dev == NULL)
+ continue;
+
+ busyq = &dev->busyq;
+ while ((acmd = TAILQ_FIRST(busyq)) != NULL) {
+ Scsi_Cmnd *cmd;
+
+ cmd = &acmd_scsi_cmd(acmd);
+ TAILQ_REMOVE(busyq, acmd,
+ acmd_links.tqe);
+ count++;
+ cmd->result = status << 16;
+ ahd_linux_queue_cmd_complete(ahd, cmd);
+ }
+ }
+ }
+
+ return (count);
+}
+
+static void
+ahd_linux_thread_run_complete_queue(struct ahd_softc *ahd)
+{
+ struct ahd_cmd *acmd;
+ u_long flags;
+
+ ahd_lock(ahd, &flags);
+ del_timer(&ahd->platform_data->completeq_timer);
+ ahd->platform_data->flags &= ~AHD_RUN_CMPLT_Q_TIMER;
+ acmd = TAILQ_FIRST(&ahd->platform_data->completeq);
+ TAILQ_INIT(&ahd->platform_data->completeq);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ ahd_unlock(ahd, &flags);
+#endif
+ if (acmd != NULL) {
+ acmd = ahd_linux_run_complete_queue(ahd, acmd);
+ if (acmd != NULL) {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ ahd_lock(ahd, &flags);
+#endif
+ ahd_schedule_completeq(ahd, acmd);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ ahd_unlock(ahd, &flags);
+#endif
+ }
+ }
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ ahd_unlock(ahd, &flags);
+#endif
+}
+
+static void
+ahd_linux_start_dv(struct ahd_softc *ahd)
+{
+
+ /*
+ * Freeze the simq and signal ahd_linux_queue to not let any
+ * more commands through
+ */
+ if ((ahd->platform_data->flags & AHD_DV_ACTIVE) == 0) {
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV)
+ printf("%s: Starting DV\n", ahd_name(ahd));
+#endif
+
+ ahd->platform_data->flags |= AHD_DV_ACTIVE;
+ ahd_freeze_simq(ahd);
+
+ /* Wake up the DV kthread */
+ up(&ahd->platform_data->dv_sem);
+ }
+}
+
+static int
+ahd_linux_dv_thread(void *data)
+{
+ struct ahd_softc *ahd;
+ int target;
+ u_long s;
+
+ ahd = (struct ahd_softc *)data;
+
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV)
+ printf("In DV Thread\n");
+#endif
+
+ /*
+ * Don't care about any signals.
+ */
+ siginitsetinv(¤t->blocked, 0);
+
+ /*
+ * Complete thread creation.
+ */
+ lock_kernel();
+ daemonize();
+ sprintf(current->comm, "ahd_dv_%d", ahd->unit);
+ unlock_kernel();
+
+ while (1) {
+ /*
+ * Use down_interruptible() rather than down() to
+ * avoid inclusion in the load average.
+ */
+ down_interruptible(&ahd->platform_data->dv_sem);
+
+ /* Check to see if we've been signaled to exit */
+ ahd_lock(ahd, &s);
+ if ((ahd->platform_data->flags & AHD_DV_SHUTDOWN) != 0) {
+ ahd_unlock(ahd, &s);
+ return (0);
+ }
+ ahd_unlock(ahd, &s);
+
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV)
+ printf("%s: Beginning Domain Validation\n",
+ ahd_name(ahd));
+#endif
+
+ /*
+ * Wait for any pending commands to drain before proceeding.
+ */
+ ahd_lock(ahd, &s);
+ while (LIST_FIRST(&ahd->pending_scbs) != NULL) {
+ ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_EMPTY;
+ ahd_unlock(ahd, &s);
+ down_interruptible(&ahd->platform_data->dv_sem);
+ ahd_lock(ahd, &s);
+ }
+
+ /*
+ * Wait for the SIMQ to be released so that DV is the
+ * only reason the queue is frozen.
+ */
+ while (AHD_DV_SIMQ_FROZEN(ahd) == 0) {
+ ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_RELEASE;
+ ahd_unlock(ahd, &s);
+ down_interruptible(&ahd->platform_data->dv_sem);
+ ahd_lock(ahd, &s);
+ }
+ ahd_unlock(ahd, &s);
+
+ for (target = 0; target < AHD_NUM_TARGETS; target++)
+ ahd_linux_dv_target(ahd, target);
+
+ ahd_lock(ahd, &s);
+ ahd->platform_data->flags &= ~AHD_DV_ACTIVE;
+ ahd_unlock(ahd, &s);
+
+ /*
+ * Release the SIMQ so that normal commands are
+ * allowed to continue on the bus.
+ */
+ ahd_release_simq(ahd);
+ }
+
+ return (0);
+}
+
+#define AHD_LINUX_DV_INQ_SHORT_LEN 36
+#define AHD_LINUX_DV_INQ_LEN 256
+#define AHD_LINUX_DV_TIMEOUT (HZ / 4)
+
+#define AHD_SET_DV_STATE(ahd, targ, newstate) \
+ ahd_set_dv_state(ahd, targ, newstate, __LINE__)
+
+static __inline void
+ahd_set_dv_state(struct ahd_softc *ahd, struct ahd_linux_target *targ,
+ ahd_dv_state newstate, u_int line)
+{
+ ahd_dv_state oldstate;
+
+ oldstate = targ->dv_state;
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV)
+ printf("%s:%d: Going from state %d to state %d\n",
+ ahd_name(ahd), line, oldstate, newstate);
+#endif
+
+ if (oldstate == newstate)
+ targ->dv_state_retry++;
+ else
+ targ->dv_state_retry = 0;
+ targ->dv_state = newstate;
+}
+
+static void
+ahd_linux_dv_target(struct ahd_softc *ahd, u_int target_offset)
+{
+ struct ahd_devinfo devinfo;
+ struct ahd_linux_target *targ;
+ struct scsi_cmnd *cmd;
+ struct scsi_device *scsi_dev;
+ struct scsi_sense_data *sense;
+ uint8_t *buffer;
+ u_long s;
+ u_int timeout;
+ int echo_size;
+
+ sense = NULL;
+ buffer = NULL;
+ echo_size = 0;
+ ahd_lock(ahd, &s);
+ targ = ahd->platform_data->targets[target_offset];
+ if (targ == NULL || (targ->flags & AHD_DV_REQUIRED) == 0) {
+ ahd_unlock(ahd, &s);
+ return;
+ }
+ ahd_compile_devinfo(&devinfo, ahd->our_id, targ->target, /*lun*/0,
+ targ->channel + 'A', ROLE_INITIATOR);
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ ahd_print_devinfo(ahd, &devinfo);
+ printf("Performing DV\n");
+ }
+#endif
+
+ ahd_unlock(ahd, &s);
+
+ cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK);
+ scsi_dev = malloc(sizeof(struct scsi_device), M_DEVBUF, M_WAITOK);
+ scsi_dev->host = ahd->platform_data->host;
+ scsi_dev->id = devinfo.target;
+ scsi_dev->lun = devinfo.lun;
+ scsi_dev->channel = devinfo.channel - 'A';
+ ahd->platform_data->dv_scsi_dev = scsi_dev;
+
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_INQ_SHORT_ASYNC);
+
+ while (targ->dv_state != AHD_DV_STATE_EXIT) {
+ timeout = AHD_LINUX_DV_TIMEOUT;
+ switch (targ->dv_state) {
+ case AHD_DV_STATE_INQ_SHORT_ASYNC:
+ case AHD_DV_STATE_INQ_ASYNC:
+ case AHD_DV_STATE_INQ_ASYNC_VERIFY:
+ /*
+ * Set things to async narrow to reduce the
+ * chance that the INQ will fail.
+ */
+ ahd_lock(ahd, &s);
+ 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, &s);
+ timeout = 10 * HZ;
+ targ->flags &= ~AHD_INQ_VALID;
+ /* FALLTHROUGH */
+ case AHD_DV_STATE_INQ_VERIFY:
+ {
+ u_int inq_len;
+
+ if (targ->dv_state == AHD_DV_STATE_INQ_SHORT_ASYNC)
+ inq_len = AHD_LINUX_DV_INQ_SHORT_LEN;
+ else
+ inq_len = targ->inq_data->additional_length + 5;
+ ahd_linux_dv_inq(ahd, cmd, &devinfo, targ, inq_len);
+ break;
+ }
+ case AHD_DV_STATE_TUR:
+ case AHD_DV_STATE_BUSY:
+ ahd_linux_dv_tur(ahd, cmd, &devinfo);
+ break;
+ case AHD_DV_STATE_REBD:
+ ahd_linux_dv_rebd(ahd, cmd, &devinfo, targ);
+ break;
+ case AHD_DV_STATE_WEB:
+ ahd_linux_dv_web(ahd, cmd, &devinfo, targ);
+ break;
+
+ case AHD_DV_STATE_REB:
+ ahd_linux_dv_reb(ahd, cmd, &devinfo, targ);
+ break;
+
+ case AHD_DV_STATE_SU:
+ ahd_linux_dv_su(ahd, cmd, &devinfo, targ);
+ timeout = 50 * HZ;
+ break;
+
+ default:
+ ahd_print_devinfo(ahd, &devinfo);
+ printf("Unknown DV state %d\n", targ->dv_state);
+ goto out;
+ }
+
+ /* Queue the command and wait for it to complete */
+ /* Abuse eh_timeout in the scsi_cmnd struct for our purposes */
+ init_timer(&cmd->eh_timeout);
+#ifdef AHD_DEBUG
+ if ((ahd_debug & AHD_SHOW_MESSAGES) != 0)
+ /*
+ * All of the printfs during negotiation
+ * really slow down the negotiation.
+ * Add a bit of time just to be safe.
+ */
+ timeout += HZ;
+#endif
+ scsi_add_timer(cmd, timeout, ahd_linux_dv_timeout);
+ /*
+ * In 2.5.X, it is assumed that all calls from the
+ * "midlayer" (which we are emulating) will have the
+ * ahd host lock held.
+ */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ ahd_lock(ahd, &s);
+#endif
+ ahd_linux_queue(cmd, ahd_linux_dv_complete);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ ahd_unlock(ahd, &s);
+#endif
+ down_interruptible(&ahd->platform_data->dv_cmd_sem);
+ /*
+ * Wait for the SIMQ to be released so that DV is the
+ * only reason the queue is frozen.
+ */
+ ahd_lock(ahd, &s);
+ while (AHD_DV_SIMQ_FROZEN(ahd) == 0) {
+ ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_RELEASE;
+ ahd_unlock(ahd, &s);
+ down_interruptible(&ahd->platform_data->dv_sem);
+ ahd_lock(ahd, &s);
+ }
+ ahd_unlock(ahd, &s);
+
+ ahd_linux_dv_transition(ahd, cmd, &devinfo, targ);
+ }
+
+out:
+ if ((targ->flags & AHD_INQ_VALID) != 0
+ && ahd_linux_get_device(ahd, devinfo.channel - 'A',
+ devinfo.target, devinfo.lun,
+ /*alloc*/FALSE) == NULL) {
+ /*
+ * The DV state machine failed to configure this device.
+ * This is normal if DV is disabled. Since we have inquiry
+ * data, filter it and use the "optimistic" negotiation
+ * parameters found in the inquiry string.
+ */
+ ahd_linux_filter_inquiry(ahd, &devinfo);
+ if ((targ->flags & (AHD_BASIC_DV|AHD_ENHANCED_DV)) != 0) {
+ ahd_print_devinfo(ahd, &devinfo);
+ printf("DV failed to configure device. "
+ "Please file a bug report against "
+ "this driver.\n");
+ }
+ }
+
+ if (cmd != NULL)
+ free(cmd, M_DEVBUF);
+
+ if (ahd->platform_data->dv_scsi_dev != NULL) {
+ free(ahd->platform_data->dv_scsi_dev, M_DEVBUF);
+ ahd->platform_data->dv_scsi_dev = NULL;
+ }
+
+ ahd_lock(ahd, &s);
+ if (targ->dv_buffer != NULL)
+ free(targ->dv_buffer, M_DEVBUF);
+ if (targ->dv_buffer1 != NULL)
+ free(targ->dv_buffer1, M_DEVBUF);
+ targ->flags &= ~AHD_DV_REQUIRED;
+ if (targ->refcount == 0)
+ ahd_linux_free_target(ahd, targ);
+ ahd_unlock(ahd, &s);
+}
+
+static void
+ahd_linux_dv_transition(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
+ struct ahd_devinfo *devinfo,
+ struct ahd_linux_target *targ)
+{
+ cam_status cam_status;
+ u_int32_t status;
+ u_int scsi_status;
+
+ scsi_status = ahd_cmd_get_scsi_status(cmd);
+ cam_status = ahd_cmd_get_transaction_status(cmd);
+ status = aic_error_action(cmd, targ->inq_data, cam_status, scsi_status);
+
+
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ ahd_print_devinfo(ahd, devinfo);
+ printf("Entering ahd_linux_dv_transition, state= %d, "
+ "status= 0x%x, cmd->result= 0x%x\n", targ->dv_state,
+ status, cmd->result);
+ }
+#endif
+
+ switch (targ->dv_state) {
+ case AHD_DV_STATE_INQ_SHORT_ASYNC:
+ case AHD_DV_STATE_INQ_ASYNC:
+ switch (status & SS_MASK) {
+ case SS_NOP:
+ {
+ AHD_SET_DV_STATE(ahd, targ, targ->dv_state+1);
+ break;
+ }
+ case SS_INQ_REFRESH:
+ AHD_SET_DV_STATE(ahd, targ,
+ AHD_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ case SS_TUR:
+ case SS_RETRY:
+ AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
+ if (ahd_cmd_get_transaction_status(cmd)
+ == CAM_REQUEUE_REQ)
+ targ->dv_state_retry--;
+ if ((status & SS_ERRMASK) == EBUSY)
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
+ if (targ->dv_state_retry < 10)
+ break;
+ /* FALLTHROUGH */
+ default:
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ ahd_print_devinfo(ahd, devinfo);
+ printf("Failed DV inquiry, skipping\n");
+ }
+#endif
+ break;
+ }
+ break;
+ case AHD_DV_STATE_INQ_ASYNC_VERIFY:
+ switch (status & SS_MASK) {
+ case SS_NOP:
+ {
+ u_int xportflags;
+ u_int spi3data;
+
+ if (memcmp(targ->inq_data, targ->dv_buffer,
+ AHD_LINUX_DV_INQ_LEN) != 0) {
+ /*
+ * Inquiry data must have changed.
+ * Try from the top again.
+ */
+ AHD_SET_DV_STATE(ahd, targ,
+ AHD_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ }
+
+ AHD_SET_DV_STATE(ahd, targ, targ->dv_state+1);
+ targ->flags |= AHD_INQ_VALID;
+ if (ahd_linux_user_dv_setting(ahd) == 0)
+ break;
+
+ xportflags = targ->inq_data->flags;
+ if ((xportflags & (SID_Sync|SID_WBus16)) == 0)
+ break;
+
+ spi3data = targ->inq_data->spi3data;
+ switch (spi3data & SID_SPI_CLOCK_DT_ST) {
+ default:
+ case SID_SPI_CLOCK_ST:
+ /* Assume only basic DV is supported. */
+ targ->flags |= AHD_BASIC_DV;
+ break;
+ case SID_SPI_CLOCK_DT:
+ case SID_SPI_CLOCK_DT_ST:
+ targ->flags |= AHD_ENHANCED_DV;
+ break;
+ }
+ break;
+ }
+ case SS_INQ_REFRESH:
+ AHD_SET_DV_STATE(ahd, targ,
+ AHD_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ case SS_TUR:
+ case SS_RETRY:
+ AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
+ if (ahd_cmd_get_transaction_status(cmd)
+ == CAM_REQUEUE_REQ)
+ targ->dv_state_retry--;
+
+ if ((status & SS_ERRMASK) == EBUSY)
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
+ if (targ->dv_state_retry < 10)
+ break;
+ /* FALLTHROUGH */
+ default:
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ ahd_print_devinfo(ahd, devinfo);
+ printf("Failed DV inquiry, skipping\n");
+ }
+#endif
+ break;
+ }
+ break;
+ case AHD_DV_STATE_INQ_VERIFY:
+ switch (status & SS_MASK) {
+ case SS_NOP:
+ {
+
+ if (memcmp(targ->inq_data, targ->dv_buffer,
+ AHD_LINUX_DV_INQ_LEN) == 0) {
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
+ break;
+ }
+
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ int i;
+
+ ahd_print_devinfo(ahd, devinfo);
+ printf("Inquiry buffer mismatch:");
+ for (i = 0; i < AHD_LINUX_DV_INQ_LEN; i++) {
+ if ((i & 0xF) == 0)
+ printf("\n ");
+ printf("0x%x:0x0%x ",
+ ((uint8_t *)targ->inq_data)[i],
+ targ->dv_buffer[i]);
+ }
+ printf("\n");
+ }
+#endif
+
+ if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
+ break;
+ }
+ /*
+ * Do not count "falling back"
+ * against our retries.
+ */
+ targ->dv_state_retry = 0;
+ AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
+ break;
+ }
+ case SS_INQ_REFRESH:
+ AHD_SET_DV_STATE(ahd, targ,
+ AHD_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ case SS_TUR:
+ case SS_RETRY:
+ AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
+ if (ahd_cmd_get_transaction_status(cmd)
+ == CAM_REQUEUE_REQ) {
+ targ->dv_state_retry--;
+ } else if ((status & SSQ_FALLBACK) != 0) {
+ if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
+ AHD_SET_DV_STATE(ahd, targ,
+ AHD_DV_STATE_EXIT);
+ break;
+ }
+ /*
+ * Do not count "falling back"
+ * against our retries.
+ */
+ targ->dv_state_retry = 0;
+ } else if ((status & SS_ERRMASK) == EBUSY)
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
+ if (targ->dv_state_retry < 10)
+ break;
+ /* FALLTHROUGH */
+ default:
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ ahd_print_devinfo(ahd, devinfo);
+ printf("Failed DV inquiry, skipping\n");
+ }
+#endif
+ break;
+ }
+ break;
+
+ case AHD_DV_STATE_TUR:
+ switch (status & SS_MASK) {
+ case SS_NOP:
+ if ((targ->flags & AHD_BASIC_DV) != 0) {
+ ahd_linux_filter_inquiry(ahd, devinfo);
+ AHD_SET_DV_STATE(ahd, targ,
+ AHD_DV_STATE_INQ_VERIFY);
+ } else if ((targ->flags & AHD_ENHANCED_DV) != 0) {
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_REBD);
+ } else {
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
+ }
+ break;
+ case SS_RETRY:
+ case SS_TUR:
+ if ((status & SS_ERRMASK) == EBUSY) {
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
+ break;
+ }
+ AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
+ if (ahd_cmd_get_transaction_status(cmd)
+ == CAM_REQUEUE_REQ) {
+ targ->dv_state_retry--;
+ } else if ((status & SSQ_FALLBACK) != 0) {
+ if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
+ AHD_SET_DV_STATE(ahd, targ,
+ AHD_DV_STATE_EXIT);
+ break;
+ }
+ /*
+ * Do not count "falling back"
+ * against our retries.
+ */
+ targ->dv_state_retry = 0;
+ }
+ if (targ->dv_state_retry >= 10) {
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ ahd_print_devinfo(ahd, devinfo);
+ printf("DV TUR reties exhausted\n");
+ }
+#endif
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
+ break;
+ }
+ if (status & SSQ_DELAY)
+ scsi_sleep(1 * HZ);
+
+ break;
+ case SS_START:
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_SU);
+ break;
+ case SS_INQ_REFRESH:
+ AHD_SET_DV_STATE(ahd, targ,
+ AHD_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ default:
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
+ break;
+ }
+ break;
+
+ case AHD_DV_STATE_REBD:
+ switch (status & SS_MASK) {
+ case SS_NOP:
+ {
+ uint32_t echo_size;
+
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_WEB);
+ echo_size = scsi_3btoul(&targ->dv_buffer[1]);
+ echo_size &= 0x1FFF;
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ ahd_print_devinfo(ahd, devinfo);
+ printf("Echo buffer size= %d\n", echo_size);
+ }
+#endif
+ if (echo_size == 0) {
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
+ break;
+ }
+
+ /* Generate the buffer pattern */
+ targ->dv_echo_size = echo_size;
+ ahd_linux_generate_dv_pattern(targ);
+ /*
+ * Setup initial negotiation values.
+ */
+ ahd_linux_filter_inquiry(ahd, devinfo);
+ break;
+ }
+ case SS_INQ_REFRESH:
+ AHD_SET_DV_STATE(ahd, targ,
+ AHD_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ case SS_RETRY:
+ AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
+ if (ahd_cmd_get_transaction_status(cmd)
+ == CAM_REQUEUE_REQ)
+ targ->dv_state_retry--;
+ if (targ->dv_state_retry <= 10)
+ break;
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ ahd_print_devinfo(ahd, devinfo);
+ printf("DV REBD reties exhausted\n");
+ }
+#endif
+ /* FALLTHROUGH */
+ case SS_FATAL:
+ default:
+ /*
+ * Setup initial negotiation values
+ * and try level 1 DV.
+ */
+ ahd_linux_filter_inquiry(ahd, devinfo);
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_INQ_VERIFY);
+ targ->dv_echo_size = 0;
+ break;
+ }
+ break;
+
+ case AHD_DV_STATE_WEB:
+ switch (status & SS_MASK) {
+ case SS_NOP:
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_REB);
+ break;
+ case SS_INQ_REFRESH:
+ AHD_SET_DV_STATE(ahd, targ,
+ AHD_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ case SS_RETRY:
+ AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
+ if (ahd_cmd_get_transaction_status(cmd)
+ == CAM_REQUEUE_REQ) {
+ targ->dv_state_retry--;
+ } else if ((status & SSQ_FALLBACK) != 0) {
+ if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
+ AHD_SET_DV_STATE(ahd, targ,
+ AHD_DV_STATE_EXIT);
+ break;
+ }
+ /*
+ * Do not count "falling back"
+ * against our retries.
+ */
+ targ->dv_state_retry = 0;
+ }
+ if (targ->dv_state_retry <= 10)
+ break;
+ /* FALLTHROUGH */
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ ahd_print_devinfo(ahd, devinfo);
+ printf("DV WEB reties exhausted\n");
+ }
+#endif
+ default:
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
+ break;
+ }
+ break;
+
+ case AHD_DV_STATE_REB:
+ switch (status & SS_MASK) {
+ case SS_NOP:
+ if (memcmp(targ->dv_buffer, targ->dv_buffer1,
+ targ->dv_echo_size) != 0) {
+ if (ahd_linux_dv_fallback(ahd, devinfo) != 0)
+ AHD_SET_DV_STATE(ahd, targ,
+ AHD_DV_STATE_EXIT);
+ else
+ AHD_SET_DV_STATE(ahd, targ,
+ AHD_DV_STATE_WEB);
+ break;
+ }
+
+ if (targ->dv_buffer != NULL) {
+ free(targ->dv_buffer, M_DEVBUF);
+ targ->dv_buffer = NULL;
+ }
+ if (targ->dv_buffer1 != NULL) {
+ free(targ->dv_buffer1, M_DEVBUF);
+ targ->dv_buffer1 = NULL;
+ }
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
+ break;
+ case SS_INQ_REFRESH:
+ AHD_SET_DV_STATE(ahd, targ,
+ AHD_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ case SS_RETRY:
+ AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
+ if (ahd_cmd_get_transaction_status(cmd)
+ == CAM_REQUEUE_REQ) {
+ targ->dv_state_retry--;
+ } else if ((status & SSQ_FALLBACK) != 0) {
+ if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
+ AHD_SET_DV_STATE(ahd, targ,
+ AHD_DV_STATE_EXIT);
+ break;
+ }
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_WEB);
+ }
+ if (targ->dv_state_retry <= 10) {
+ if ((status & (SSQ_DELAY_RANDOM|SSQ_DELAY))!= 0)
+ scsi_sleep(ahd->our_id*HZ/10);
+ break;
+ }
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ ahd_print_devinfo(ahd, devinfo);
+ printf("DV REB reties exhausted\n");
+ }
+#endif
+ /* FALLTHROUGH */
+ default:
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
+ break;
+ }
+ break;
+
+ case AHD_DV_STATE_SU:
+ switch (status & SS_MASK) {
+ case SS_NOP:
+ case SS_INQ_REFRESH:
+ AHD_SET_DV_STATE(ahd, targ,
+ AHD_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ default:
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
+ break;
+ }
+ break;
+
+ case AHD_DV_STATE_BUSY:
+ switch (status & SS_MASK) {
+ case SS_NOP:
+ case SS_INQ_REFRESH:
+ AHD_SET_DV_STATE(ahd, targ,
+ AHD_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ case SS_TUR:
+ case SS_RETRY:
+ AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
+ if (ahd_cmd_get_transaction_status(cmd)
+ == CAM_REQUEUE_REQ) {
+ targ->dv_state_retry--;
+ } else if (targ->dv_state_retry < 60) {
+ if ((status & SSQ_DELAY) != 0)
+ scsi_sleep(1 * HZ);
+ } else {
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ ahd_print_devinfo(ahd, devinfo);
+ printf("DV BUSY reties exhausted\n");
+ }
+#endif
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
+ }
+ break;
+ default:
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
+ break;
+ }
+ break;
+
+ default:
+ printf("%s: Invalid DV completion state %d\n", ahd_name(ahd),
+ targ->dv_state);
+ AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
+ break;
+ }
+}
+
+static void
+ahd_linux_dv_fill_cmd(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
+ struct ahd_devinfo *devinfo)
+{
+ memset(cmd, 0, sizeof(struct scsi_cmnd));
+ cmd->device = ahd->platform_data->dv_scsi_dev;
+ cmd->scsi_done = ahd_linux_dv_complete;
+}
+
+/*
+ * Synthesize an inquiry command. On the return trip, it'll be
+ * sniffed and the device transfer settings set for us.
+ */
+static void
+ahd_linux_dv_inq(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
+ struct ahd_devinfo *devinfo, struct ahd_linux_target *targ,
+ u_int request_length)
+{
+
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ ahd_print_devinfo(ahd, devinfo);
+ printf("Sending INQ\n");
+ }
+#endif
+ if (targ->inq_data == NULL)
+ targ->inq_data = malloc(AHD_LINUX_DV_INQ_LEN,
+ M_DEVBUF, M_WAITOK);
+ if (targ->dv_state > AHD_DV_STATE_INQ_ASYNC) {
+ if (targ->dv_buffer != NULL)
+ free(targ->dv_buffer, M_DEVBUF);
+ targ->dv_buffer = malloc(AHD_LINUX_DV_INQ_LEN,
+ M_DEVBUF, M_WAITOK);
+ }
+
+ ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
+ cmd->sc_data_direction = SCSI_DATA_READ;
+ cmd->cmd_len = 6;
+ cmd->cmnd[0] = INQUIRY;
+ cmd->cmnd[4] = request_length;
+ cmd->request_bufflen = request_length;
+ if (targ->dv_state > AHD_DV_STATE_INQ_ASYNC)
+ cmd->request_buffer = targ->dv_buffer;
+ else
+ cmd->request_buffer = targ->inq_data;
+ memset(cmd->request_buffer, 0, AHD_LINUX_DV_INQ_LEN);
+}
+
+static void
+ahd_linux_dv_tur(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
+ struct ahd_devinfo *devinfo)
+{
+
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ ahd_print_devinfo(ahd, devinfo);
+ printf("Sending TUR\n");
+ }
+#endif
+ /* Do a TUR to clear out any non-fatal transitional state */
+ ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
+ cmd->sc_data_direction = SCSI_DATA_NONE;
+ cmd->cmd_len = 6;
+ cmd->cmnd[0] = TEST_UNIT_READY;
+}
+
+#define AHD_REBD_LEN 4
+
+static void
+ahd_linux_dv_rebd(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
+ struct ahd_devinfo *devinfo, struct ahd_linux_target *targ)
+{
+
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ ahd_print_devinfo(ahd, devinfo);
+ printf("Sending REBD\n");
+ }
+#endif
+ if (targ->dv_buffer != NULL)
+ free(targ->dv_buffer, M_DEVBUF);
+ targ->dv_buffer = malloc(AHD_REBD_LEN, M_DEVBUF, M_WAITOK);
+ ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
+ cmd->sc_data_direction = SCSI_DATA_READ;
+ cmd->cmd_len = 10;
+ cmd->cmnd[0] = READ_BUFFER;
+ cmd->cmnd[1] = 0x0b;
+ scsi_ulto3b(AHD_REBD_LEN, &cmd->cmnd[6]);
+ cmd->request_bufflen = AHD_REBD_LEN;
+ cmd->underflow = cmd->request_bufflen;
+ cmd->request_buffer = targ->dv_buffer;
+}
+
+static void
+ahd_linux_dv_web(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
+ struct ahd_devinfo *devinfo, struct ahd_linux_target *targ)
+{
+
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ ahd_print_devinfo(ahd, devinfo);
+ printf("Sending WEB\n");
+ }
+#endif
+ ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
+ cmd->sc_data_direction = SCSI_DATA_WRITE;
+ cmd->cmd_len = 10;
+ cmd->cmnd[0] = WRITE_BUFFER;
+ cmd->cmnd[1] = 0x0a;
+ scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]);
+ cmd->request_bufflen = targ->dv_echo_size;
+ cmd->underflow = cmd->request_bufflen;
+ cmd->request_buffer = targ->dv_buffer;
+}
+
+static void
+ahd_linux_dv_reb(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
+ struct ahd_devinfo *devinfo, struct ahd_linux_target *targ)
+{
+
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ ahd_print_devinfo(ahd, devinfo);
+ printf("Sending REB\n");
+ }
+#endif
+ ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
+ cmd->sc_data_direction = SCSI_DATA_READ;
+ cmd->cmd_len = 10;
+ cmd->cmnd[0] = READ_BUFFER;
+ cmd->cmnd[1] = 0x0a;
+ scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]);
+ cmd->request_bufflen = targ->dv_echo_size;
+ cmd->underflow = cmd->request_bufflen;
+ cmd->request_buffer = targ->dv_buffer1;
+}
+
+static void
+ahd_linux_dv_su(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
+ struct ahd_devinfo *devinfo,
+ struct ahd_linux_target *targ)
+{
+ u_int le;
+
+ le = SID_IS_REMOVABLE(targ->inq_data) ? SSS_LOEJ : 0;
+
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ ahd_print_devinfo(ahd, devinfo);
+ printf("Sending SU\n");
+ }
+#endif
+ ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
+ cmd->sc_data_direction = SCSI_DATA_NONE;
+ cmd->cmd_len = 6;
+ cmd->cmnd[0] = START_STOP_UNIT;
+ cmd->cmnd[4] = le | SSS_START;
+}
+
+static __inline int
+ahd_linux_dv_fallback(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
+{
+ u_long s;
+ int retval;
+
+ ahd_lock(ahd, &s);
+ retval = ahd_linux_fallback(ahd, devinfo);
+ ahd_unlock(ahd, &s);
+
+ return (retval);
+}
+
+static int
+ahd_linux_fallback(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
+{
+ struct ahd_linux_target *targ;
+ struct ahd_initiator_tinfo *tinfo;
+ struct ahd_transinfo *goal;
+ struct ahd_tmode_tstate *tstate;
+ u_int width;
+ u_int period;
+ u_int offset;
+ u_int ppr_options;
+ u_int cur_speed;
+ u_int wide_speed;
+ u_int narrow_speed;
+ u_int fallback_speed;
+
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ ahd_print_devinfo(ahd, devinfo);
+ printf("Trying to fallback\n");
+ }
+#endif
+ targ = ahd->platform_data->targets[devinfo->target_offset];
+ tinfo = ahd_fetch_transinfo(ahd, devinfo->channel,
+ devinfo->our_scsiid,
+ devinfo->target, &tstate);
+ goal = &tinfo->goal;
+ width = goal->width;
+ period = goal->period;
+ offset = goal->offset;
+ ppr_options = goal->ppr_options;
+ if (offset == 0)
+ period = AHD_ASYNC_XFER_PERIOD;
+ if (targ->dv_next_narrow_period == 0)
+ targ->dv_next_narrow_period = MAX(period, AHD_SYNCRATE_ULTRA2);
+ if (targ->dv_next_wide_period == 0)
+ targ->dv_next_wide_period = period;
+ if (targ->dv_max_width == 0)
+ targ->dv_max_width = width;
+ if (targ->dv_max_ppr_options == 0)
+ targ->dv_max_ppr_options = ppr_options;
+ if (targ->dv_last_ppr_options == 0)
+ targ->dv_last_ppr_options = ppr_options;
+
+ cur_speed = aic_calc_speed(width, period, offset, AHD_SYNCRATE_MIN);
+ wide_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_16_BIT,
+ targ->dv_next_wide_period,
+ MAX_OFFSET, AHD_SYNCRATE_MIN);
+ narrow_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_8_BIT,
+ targ->dv_next_narrow_period,
+ MAX_OFFSET, AHD_SYNCRATE_MIN);
+ fallback_speed = aic_calc_speed(width, period+1, offset,
+ AHD_SYNCRATE_MIN);
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ printf("cur_speed= %d, wide_speed= %d, narrow_speed= %d, "
+ "fallback_speed= %d\n", cur_speed, wide_speed,
+ narrow_speed, fallback_speed);
+ }
+#endif
+
+ if (cur_speed > 160000) {
+ /*
+ * Paced/DT/IU_REQ only transfer speeds. All we
+ * can do is fallback in terms of syncrate.
+ */
+ period++;
+ } else if (cur_speed > 80000) {
+ if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
+ /*
+ * Try without IU_REQ as it may be confusing
+ * an expander.
+ */
+ ppr_options &= ~MSG_EXT_PPR_IU_REQ;
+ } else {
+ /*
+ * Paced/DT only transfer speeds. All we
+ * can do is fallback in terms of syncrate.
+ */
+ period++;
+ ppr_options = targ->dv_max_ppr_options;
+ }
+ } else if (cur_speed > 3300) {
+
+ /*
+ * In this range we the following
+ * options ordered from highest to
+ * lowest desireability:
+ *
+ * o Wide/DT
+ * o Wide/non-DT
+ * o Narrow at a potentally higher sync rate.
+ *
+ * All modes are tested with and without IU_REQ
+ * set since using IUs may confuse an expander.
+ */
+ if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
+
+ ppr_options &= ~MSG_EXT_PPR_IU_REQ;
+ } else if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0) {
+ /*
+ * Try going non-DT.
+ */
+ ppr_options = targ->dv_max_ppr_options;
+ ppr_options &= ~MSG_EXT_PPR_DT_REQ;
+ } else if (targ->dv_last_ppr_options != 0) {
+ /*
+ * Try without QAS or any other PPR options.
+ * We may need a non-PPR message to work with
+ * an expander. We look at the "last PPR options"
+ * so we will perform this fallback even if the
+ * target responded to our PPR negotiation with
+ * no option bits set.
+ */
+ ppr_options = 0;
+ } else if (width == MSG_EXT_WDTR_BUS_16_BIT) {
+ /*
+ * If the next narrow speed is greater than
+ * the next wide speed, fallback to narrow.
+ * Otherwise fallback to the next DT/Wide setting.
+ * The narrow async speed will always be smaller
+ * than the wide async speed, so handle this case
+ * specifically.
+ */
+ ppr_options = targ->dv_max_ppr_options;
+ if (narrow_speed > fallback_speed
+ || period >= AHD_ASYNC_XFER_PERIOD) {
+ targ->dv_next_wide_period = period+1;
+ width = MSG_EXT_WDTR_BUS_8_BIT;
+ period = targ->dv_next_narrow_period;
+ } else {
+ period++;
+ }
+ } else if ((ahd->features & AHD_WIDE) != 0
+ && targ->dv_max_width != 0
+ && wide_speed >= fallback_speed
+ && (targ->dv_next_wide_period <= AHD_ASYNC_XFER_PERIOD
+ || period >= AHD_ASYNC_XFER_PERIOD)) {
+
+ /*
+ * We are narrow. Try falling back
+ * to the next wide speed with
+ * all supported ppr options set.
+ */
+ targ->dv_next_narrow_period = period+1;
+ width = MSG_EXT_WDTR_BUS_16_BIT;
+ period = targ->dv_next_wide_period;
+ ppr_options = targ->dv_max_ppr_options;
+ } else {
+ /* Only narrow fallback is allowed. */
+ period++;
+ ppr_options = targ->dv_max_ppr_options;
+ }
+ } else {
+ return (-1);
+ }
+ offset = MAX_OFFSET;
+ ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_PACED);
+ ahd_set_width(ahd, devinfo, width, AHD_TRANS_GOAL, FALSE);
+ if (period == 0) {
+ period = 0;
+ offset = 0;
+ ppr_options = 0;
+ if (width == MSG_EXT_WDTR_BUS_8_BIT)
+ targ->dv_next_narrow_period = AHD_ASYNC_XFER_PERIOD;
+ else
+ targ->dv_next_wide_period = AHD_ASYNC_XFER_PERIOD;
+ }
+ ahd_set_syncrate(ahd, devinfo, period, offset,
+ ppr_options, AHD_TRANS_GOAL, FALSE);
+ targ->dv_last_ppr_options = ppr_options;
+ return (0);
+}
+
+static void
+ahd_linux_dv_timeout(struct scsi_cmnd *cmd)
+{
+ struct ahd_softc *ahd;
+ struct ahd_cmd *acmd;
+ struct ahd_linux_device *next_dev;
+ struct scb *scb;
+ u_long flags;
+
+ ahd = *((struct ahd_softc **)cmd->device->host->hostdata);
+ ahd_lock(ahd, &flags);
+
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV) {
+ printf("%s: Timeout while doing DV command %x.\n",
+ ahd_name(ahd), cmd->cmnd[0]);
+ ahd_dump_card_state(ahd);
+ }
+#endif
+
+ /*
+ * Guard against "done race". No action is
+ * required if we just completed.
+ */
+ if ((scb = (struct scb *)cmd->host_scribble) == NULL) {
+ ahd_unlock(ahd, &flags);
+ return;
+ }
+
+ /*
+ * Command has not completed. Mark this
+ * SCB as having failing status prior to
+ * resetting the bus, so we get the correct
+ * error code.
+ */
+ if ((scb->flags & SCB_SENSE) != 0)
+ ahd_set_transaction_status(scb, CAM_AUTOSENSE_FAIL);
+ else
+ ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
+ ahd_reset_channel(ahd, cmd->channel + 'A', /*initiate*/TRUE);
+
+ /*
+ * Add a minimal bus settle delay for devices that are slow to
+ * respond after bus resets.
+ */
+ ahd_freeze_simq(ahd);
+ init_timer(&ahd->platform_data->reset_timer);
+ ahd->platform_data->reset_timer.data = (u_long)ahd;
+ ahd->platform_data->reset_timer.expires = jiffies + HZ / 2;
+ ahd->platform_data->reset_timer.function =
+ (ahd_linux_callback_t *)ahd_release_simq;
+ add_timer(&ahd->platform_data->reset_timer);
+ /*
+ * In 2.5.X, the "done lock" is the ahd_lock.
+ * Instead of dropping and re-acquiring the same
+ * lock in the 2.5.X case, just hold our ahd_lock
+ * the whole time. ahd_done_lock() has been
+ * made a no-op for 2.5.X too.
+ */
+ acmd = TAILQ_FIRST(&ahd->platform_data->completeq);
+ TAILQ_INIT(&ahd->platform_data->completeq);
+ next_dev = ahd_linux_next_device_to_run(ahd);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ ahd_unlock(ahd, &flags);
+#endif
+ if (next_dev)
+ ahd_schedule_runq(ahd);
+ if (acmd != NULL) {
+ acmd = ahd_linux_run_complete_queue(ahd, acmd);
+ if (acmd != NULL) {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ ahd_lock(ahd, &flags);
+#endif
+ ahd_schedule_completeq(ahd, acmd);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ ahd_unlock(ahd, &flags);
+#endif
+ }
+ }
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ ahd_unlock(ahd, &flags);
+#endif
+}
+
+static void
+ahd_linux_dv_complete(struct scsi_cmnd *cmd)
+{
+ struct ahd_softc *ahd;
+
+ ahd = *((struct ahd_softc **)cmd->device->host->hostdata);
+
+ /* Delete the DV timer before it goes off! */
+ scsi_delete_timer(cmd);
+
+#ifdef AHD_DEBUG
+ if (ahd_debug & AHD_SHOW_DV)
+ printf("%s:%c:%d: Command completed, status= 0x%x\n",
+ ahd_name(ahd), cmd->device->channel, cmd->device->id,
+ cmd->result);
+#endif
+
+ /* Wake up the state machine */
+ up(&ahd->platform_data->dv_cmd_sem);
+}
+
+static void
+ahd_linux_generate_dv_pattern(struct ahd_linux_target *targ)
+{
+ uint16_t b;
+ u_int i;
+ u_int j;
+
+ if (targ->dv_buffer != NULL)
+ free(targ->dv_buffer, M_DEVBUF);
+ targ->dv_buffer = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK);
+ if (targ->dv_buffer1 != NULL)
+ free(targ->dv_buffer1, M_DEVBUF);
+ targ->dv_buffer1 = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK);
+
+ i = 0;
+
+ b = 0x0001;
+ for (j = 0 ; i < targ->dv_echo_size; j++) {
+ if (j < 32) {
+ /*
+ * 32bytes of sequential numbers.
+ */
+ targ->dv_buffer[i++] = j & 0xff;
+ } else if (j < 48) {
+ /*
+ * 32bytes of repeating 0x0000, 0xffff.
+ */
+ targ->dv_buffer[i++] = (j & 0x02) ? 0xff : 0x00;
+ } else if (j < 64) {
+ /*
+ * 32bytes of repeating 0x5555, 0xaaaa.
+ */
+ targ->dv_buffer[i++] = (j & 0x02) ? 0xaa : 0x55;
+ } else {
+ /*
+ * Remaining buffer is filled with a repeating
+ * patter of:
+ *
+ * 0xffff
+ * ~0x0001 << shifted once in each loop.
+ */
+ if (j & 0x02) {
+ if (j & 0x01) {
+ targ->dv_buffer[i++] = ~(b >> 8) & 0xff;
+ b <<= 1;
+ if (b == 0x0000)
+ b = 0x0001;
+ } else {
+ targ->dv_buffer[i++] = (~b & 0xff);
+ }
+ } else {
+ targ->dv_buffer[i++] = 0xff;
+ }
+ }
+ }
+}
+
+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 (warned_user == 0
+ && ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
+
+ printf("aic79xx: WARNING, insufficient "
+ "tag_info instances for installed "
+ "controllers. Using defaults\n");
+ printf("aic79xx: Please update the "
+ "aic79xx_tag_info array in the "
+ "aic79xx.c source file.\n");
+ tags = AHD_MAX_QUEUE;
+ warned_user++;
+ } 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);
+}
+
+static u_int
+ahd_linux_user_dv_setting(struct ahd_softc *ahd)
+{
+ static int warned_user;
+ int dv;
+
+ if (warned_user == 0
+ && ahd->unit >= NUM_ELEMENTS(aic79xx_dv_settings)) {
+
+ printf("aic79xx: WARNING, insufficient "
+ "dv settings instances for installed "
+ "controllers. Using defaults\n");
+ printf("aic79xx: Please update the "
+ "aic79xx_dv_settings array in the "
+ "aic79xx.c source file.\n");
+ dv = -1;
+ warned_user++;
+ } else {
+
+ dv = aic79xx_dv_settings[ahd->unit];
+ }
+
+ if (dv < 0) {
+ /*
+ * Apply the default.
+ */
+ dv = 1;
+ if (ahd->seep_config != 0)
+ dv = (ahd->seep_config->bios_control & CFENABLEDV);
+ }
+ return (dv);
+}
+
+/*
+ * Determines the queue depth for a given device.
+ */
+static void
+ahd_linux_device_queue_depth(struct ahd_softc *ahd,
+ struct ahd_linux_device *dev)
+{
+ struct ahd_devinfo devinfo;
+ u_int tags;
+
+ ahd_compile_devinfo(&devinfo,
+ ahd->our_id,
+ dev->target->target, dev->lun,
+ dev->target->channel == 0 ? 'A' : 'B',
+ ROLE_INITIATOR);
+ tags = ahd_linux_user_tagdepth(ahd, &devinfo);
+ if (tags != 0
+ && dev->scsi_device != NULL
+ && dev->scsi_device->tagged_supported != 0) {
+
+ ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
+ printf("scsi%d:%c:%d:%d: Tagged Queuing enabled. Depth %d\n",
+ ahd->platform_data->host->host_no, devinfo.channel,
+ devinfo.target, devinfo.lun, tags);
+ } else {
+ ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
+ }
+}
+
+static void
+ahd_linux_run_device_queue(struct ahd_softc *ahd, struct ahd_linux_device *dev)
+{
+ struct ahd_cmd *acmd;
+ 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;
+
+ if ((dev->flags & AHD_DEV_ON_RUN_LIST) != 0)
+ panic("running device on run list");
+
+ while ((acmd = TAILQ_FIRST(&dev->busyq)) != NULL
+ && dev->openings > 0 && dev->qfrozen == 0) {
+
+ /*
+ * Schedule us to run later. The only reason we are not
+ * running is because the whole controller Q is frozen.
+ */
+ if (ahd->platform_data->qfrozen != 0
+ && AHD_DV_SIMQ_FROZEN(ahd) == 0) {
+
+ TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq,
+ dev, links);
+ dev->flags |= AHD_DEV_ON_RUN_LIST;
+ return;
+ }
+
+ cmd = &acmd_scsi_cmd(acmd);
+
+ /*
+ * 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) {
+ TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq,
+ dev, links);
+ dev->flags |= AHD_DEV_ON_RUN_LIST;
+ ahd->flags |= AHD_RESOURCE_SHORTAGE;
+ return;
+ }
+ TAILQ_REMOVE(&dev->busyq, acmd, acmd_links.tqe);
+ 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->lun;
+ scb->hscb->task_management = 0;
+ mask = SCB_GET_TARGET_MASK(ahd, scb);
+
+ if ((ahd->user_discenable & mask) != 0)
+ hscb->control |= DISCENB;
+
+ if (AHD_DV_CMD(cmd) != 0)
+ scb->flags |= SCB_SILENT;
+
+ 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 LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ int msg_bytes;
+ uint8_t tag_msgs[2];
+
+ msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
+ if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
+ hscb->control |= tag_msgs[0];
+ if (tag_msgs[0] == MSG_ORDERED_TASK)
+ dev->commands_since_idle_or_otag = 0;
+ } else
+#endif
+ 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->sg_count = 0;
+ ahd_set_residual(scb, 0);
+ ahd_set_sense_residual(scb, 0);
+ if (cmd->use_sg != 0) {
+ void *sg;
+ struct scatterlist *cur_seg;
+ u_int nseg;
+ int dir;
+
+ cur_seg = (struct scatterlist *)cmd->request_buffer;
+ dir = scsi_to_pci_dma_dir(cmd->sc_data_direction);
+ nseg = pci_map_sg(ahd->dev_softc, cur_seg,
+ cmd->use_sg, dir);
+ scb->platform_data->xfer_len = 0;
+ for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
+ bus_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,
+ /*last*/nseg == 1);
+ }
+ } else if (cmd->request_bufflen != 0) {
+ void *sg;
+ bus_addr_t addr;
+ int dir;
+
+ sg = scb->sg_list;
+ dir = scsi_to_pci_dma_dir(cmd->sc_data_direction);
+ addr = pci_map_single(ahd->dev_softc,
+ cmd->request_buffer,
+ cmd->request_bufflen, dir);
+ scb->platform_data->xfer_len = cmd->request_bufflen;
+ scb->platform_data->buf_busaddr = addr;
+ sg = ahd_sg_setup(ahd, scb, sg, addr,
+ cmd->request_bufflen, /*last*/TRUE);
+ }
+
+ LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
+ dev->openings--;
+ dev->active++;
+ dev->commands_issued++;
+
+ /* Update the error counting bucket and dump if needed */
+ if (dev->target->cmds_since_error) {
+ dev->target->cmds_since_error++;
+ if (dev->target->cmds_since_error >
+ AHD_LINUX_ERR_THRESH)
+ dev->target->cmds_since_error = 0;
+ }
+
+ if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
+ dev->commands_since_idle_or_otag++;
+ scb->flags |= SCB_ACTIVE;
+ ahd_queue_scb(ahd, scb);
+ }
+}
+
+/*
+ * SCSI controller interrupt handler.
+ */
+void
+ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
+{
+ struct ahd_softc *ahd;
+ struct ahd_cmd *acmd;
+ u_long flags;
+ struct ahd_linux_device *next_dev;
+
+ ahd = (struct ahd_softc *) dev_id;
+ ahd_lock(ahd, &flags);
+ ahd_intr(ahd);
+ acmd = TAILQ_FIRST(&ahd->platform_data->completeq);
+ TAILQ_INIT(&ahd->platform_data->completeq);
+ next_dev = ahd_linux_next_device_to_run(ahd);
+ /*
+ * In 2.5.X, the "done lock" is the ahd_lock.
+ * Instead of dropping and re-acquiring the same
+ * lock in the 2.5.X case, just hold our ahd_lock
+ * the whole time. ahd_done_lock() has been
+ * made a no-op for 2.5.X too.
+ */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ ahd_unlock(ahd, &flags);
+#endif
+ if (next_dev)
+ ahd_schedule_runq(ahd);
+ if (acmd != NULL) {
+ acmd = ahd_linux_run_complete_queue(ahd, acmd);
+ if (acmd != NULL) {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ ahd_lock(ahd, &flags);
+#endif
+ ahd_schedule_completeq(ahd, acmd);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ ahd_unlock(ahd, &flags);
+#endif
+ }
+ }
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ ahd_unlock(ahd, &flags);
+#endif
+}
+
+void
+ahd_platform_flushwork(struct ahd_softc *ahd)
+{
+ struct ahd_cmd *acmd;
+
+ acmd = TAILQ_FIRST(&ahd->platform_data->completeq);
+ TAILQ_INIT(&ahd->platform_data->completeq);
+ while (acmd != NULL)
+ acmd = ahd_linux_run_complete_queue(ahd, acmd);
+}
+
+static struct ahd_linux_target*
+ahd_linux_alloc_target(struct ahd_softc *ahd, u_int channel, u_int target)
+{
+ struct ahd_linux_target *targ;
+ u_int target_offset;
+
+ target_offset = target;
+ /*
+ * Never allow allocation of a target object for
+ * our own SCSIID.
+ */
+ if (target == ahd->our_id) {
+ ahd->platform_data->targets[target_offset] = NULL;
+ return (NULL);
+ }
+
+ targ = malloc(sizeof(*targ), M_DEVBUF, M_NOWAIT);
+ if (targ == NULL)
+ return (NULL);
+ memset(targ, 0, sizeof(*targ));
+ targ->channel = channel;
+ targ->target = target;
+ targ->ahd = ahd;
+ targ->flags = AHD_DV_REQUIRED;
+ ahd->platform_data->targets[target_offset] = targ;
+ return (targ);
+}
+
+static void
+ahd_linux_free_target(struct ahd_softc *ahd, struct ahd_linux_target *targ)
+{
+ struct ahd_devinfo devinfo;
+ struct ahd_initiator_tinfo *tinfo;
+ struct ahd_tmode_tstate *tstate;
+ u_int our_id;
+ u_int target_offset;
+ char channel;
+
+ /*
+ * Force a negotiation to async/narrow on any
+ * future command to this device unless a bus
+ * reset occurs between now and that command.
+ */
+ channel = 'A' + targ->channel;
+ our_id = ahd->our_id;
+ target_offset = targ->target;
+ tinfo = ahd_fetch_transinfo(ahd, channel, our_id,
+ targ->target, &tstate);
+ ahd_compile_devinfo(&devinfo, our_id, targ->target, 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_update_neg_request(ahd, &devinfo, tstate, tinfo, AHD_NEG_ALWAYS);
+ ahd->platform_data->targets[target_offset] = NULL;
+ if (targ->inq_data != NULL)
+ free(targ->inq_data, M_DEVBUF);
+ if (targ->dv_buffer != NULL)
+ free(targ->dv_buffer, M_DEVBUF);
+ if (targ->dv_buffer1 != NULL)
+ free(targ->dv_buffer1, M_DEVBUF);
+ free(targ, M_DEVBUF);
+}
+
+static struct ahd_linux_device*
+ahd_linux_alloc_device(struct ahd_softc *ahd,
+ struct ahd_linux_target *targ, u_int lun)
+{
+ struct ahd_linux_device *dev;
+
+ dev = malloc(sizeof(*dev), M_DEVBUG, M_NOWAIT);
+ if (dev == NULL)
+ return (NULL);
+ memset(dev, 0, sizeof(*dev));
+ init_timer(&dev->timer);
+ TAILQ_INIT(&dev->busyq);
+ dev->flags = AHD_DEV_UNCONFIGURED;
+ dev->lun = lun;
+ dev->target = targ;
+
+ /*
+ * 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;
+
+ targ->refcount++;
+ targ->devices[lun] = dev;
+ return (dev);
+}
+
+static void
+ahd_linux_free_device(struct ahd_softc *ahd, struct ahd_linux_device *dev)
+{
+ struct ahd_linux_target *targ;
+
+ del_timer(&dev->timer);
+ targ = dev->target;
+ targ->devices[dev->lun] = NULL;
+ free(dev, M_DEVBUF);
+ targ->refcount--;
+ if (targ->refcount == 0
+ && (targ->flags & AHD_DV_REQUIRED) == 0)
+ ahd_linux_free_target(ahd, targ);
+}
+
+void
+ahd_send_async(struct ahd_softc *ahd, char channel,
+ u_int target, u_int lun, ac_code code, void *arg)
+{
+ switch (code) {
+ case AC_TRANSFER_NEG:
+ {
+ char buf[80];
+ struct ahd_linux_target *targ;
+ struct info_str info;
+ struct ahd_initiator_tinfo *tinfo;
+ struct ahd_tmode_tstate *tstate;
+
+ info.buffer = buf;
+ info.length = sizeof(buf);
+ info.offset = 0;
+ info.pos = 0;
+ 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.
+ */
+ targ = ahd->platform_data->targets[target];
+ if (targ == NULL)
+ break;
+ if (tinfo->curr.period == targ->last_tinfo.period
+ && tinfo->curr.width == targ->last_tinfo.width
+ && tinfo->curr.offset == targ->last_tinfo.offset
+ && tinfo->curr.ppr_options == targ->last_tinfo.ppr_options)
+ if (bootverbose == 0)
+ break;
+
+ targ->last_tinfo.period = tinfo->curr.period;
+ targ->last_tinfo.width = tinfo->curr.width;
+ targ->last_tinfo.offset = tinfo->curr.offset;
+ targ->last_tinfo.ppr_options = tinfo->curr.ppr_options;
+
+ printf("(%s:%c:", ahd_name(ahd), channel);
+ if (target == CAM_TARGET_WILDCARD)
+ printf("*): ");
+ else
+ printf("%d): ", target);
+ ahd_format_transinfo(&info, &tinfo->curr);
+ if (info.pos < info.length)
+ *info.buffer = '\0';
+ else
+ buf[info.length - 1] = '\0';
+ printf("%s", buf);
+ break;
+ }
+ case AC_SENT_BDR:
+ {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
+ Scsi_Device *scsi_dev;
+
+ /*
+ * Find the SCSI device associated with this
+ * request and indicate that a UA is expected.
+ * XXX This should really be handled by the mid-layer.
+ */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ list_for_each_entry(scsi_dev,
+ &ahd->platform_data->host->my_devices,
+ siblings) {
+#else
+ for (scsi_dev = ahd->platform_data->host->host_queue;
+ scsi_dev != NULL; scsi_dev = scsi_dev->next) {
+#endif
+ if (channel - 'A' == scsi_dev->channel
+ && target == scsi_dev->id
+ && (lun == CAM_LUN_WILDCARD
+ || lun == scsi_dev->lun)) {
+ scsi_dev->was_reset = 1;
+ scsi_dev->expecting_cc_ua = 1;
+ }
+ }
+#endif
+ break;
+ }
+ case AC_BUS_RESET:
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
+ if (ahd->platform_data->host != NULL) {
+ scsi_report_bus_reset(ahd->platform_data->host,
+ channel - 'A');
+ }
+#endif
+ 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)
+{
+ Scsi_Cmnd *cmd;
+ struct ahd_linux_device *dev;
+
+ LIST_REMOVE(scb, pending_links);
+
+ if ((scb->flags & SCB_ACTIVE) == 0) {
+ printf("SCB %d done'd twice\n", scb->hscb->tag);
+ ahd_dump_card_state(ahd);
+ 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--;
+ }
+ 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);
+ printf("Set CAM_UNCOR_PARITY\n");
+ }
+#endif
+ ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
+ } else if (amount_xferred < scb->io_ctx->underflow) {
+ printf("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);
+ } 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, dev, scb);
+ } else if (ahd_get_transaction_status(scb) == CAM_SEL_TIMEOUT) {
+ dev->flags |= AHD_DEV_UNCONFIGURED;
+ if (AHD_DV_CMD(cmd) == FALSE)
+ dev->target->flags &= ~AHD_DV_REQUIRED;
+ }
+ /*
+ * Start DV for devices that require it assuming the first command
+ * sent does not result in a selection timeout.
+ */
+ if (ahd_get_transaction_status(scb) != CAM_SEL_TIMEOUT
+ && (dev->target->flags & AHD_DV_REQUIRED) != 0)
+ ahd_linux_start_dv(ahd);
+
+ 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 (TAILQ_EMPTY(&dev->busyq)) {
+ if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0
+ && dev->active == 0)
+ ahd_linux_free_device(ahd, dev);
+ } else if ((dev->flags & AHD_DEV_ON_RUN_LIST) == 0) {
+ TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq, dev, links);
+ dev->flags |= AHD_DEV_ON_RUN_LIST;
+ }
+
+ if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
+ printf("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->flags & AHD_UP_EH_SEMAPHORE) != 0) {
+ ahd->platform_data->flags &= ~AHD_UP_EH_SEMAPHORE;
+ up(&ahd->platform_data->eh_sem);
+ }
+ }
+
+ ahd_free_scb(ahd, scb);
+ ahd_linux_queue_cmd_complete(ahd, cmd);
+
+ if ((ahd->platform_data->flags & AHD_DV_WAIT_SIMQ_EMPTY) != 0
+ && LIST_FIRST(&ahd->pending_scbs) == NULL) {
+ ahd->platform_data->flags &= ~AHD_DV_WAIT_SIMQ_EMPTY;
+ up(&ahd->platform_data->dv_sem);
+ }
+}
+
+static void
+ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
+ struct ahd_linux_device *dev, struct scb *scb)
+{
+ struct ahd_devinfo devinfo;
+
+ ahd_compile_devinfo(&devinfo,
+ ahd->our_id,
+ dev->target->target, dev->lun,
+ dev->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:
+ {
+ 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),
+ sizeof(cmd->sense_buffer));
+ 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(scsi_4btoul(siu->sense_length),
+ sizeof(cmd->sense_buffer));
+ sense_offset = SIU_SENSE_OFFSET(siu);
+ }
+
+ memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
+ 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;
+
+ printf("Copied %d bytes of sense data at %d:",
+ sense_size, sense_offset);
+ for (i = 0; i < sense_size; i++) {
+ if ((i & 0xF) == 0)
+ printf("\n");
+ printf("0x%x ", cmd->sense_buffer[i]);
+ }
+ printf("\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) {
+ ahd_print_path(ahd, scb);
+ printf("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);
+ printf("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_set_tags(ahd, &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_set_tags(ahd, &devinfo,
+ (dev->flags & AHD_DEV_Q_BASIC)
+ ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
+ ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
+ /* FALLTHROUGH */
+ }
+ case SCSI_STATUS_BUSY:
+ /*
+ * Set a short timer to defer sending commands for
+ * a bit since Linux will not delay in this case.
+ */
+ if ((dev->flags & AHD_DEV_TIMER_ACTIVE) != 0) {
+ printf("%s:%c:%d: Device Timer still active during "
+ "busy processing\n", ahd_name(ahd),
+ dev->target->channel, dev->target->target);
+ break;
+ }
+ dev->flags |= AHD_DEV_TIMER_ACTIVE;
+ dev->qfrozen++;
+ init_timer(&dev->timer);
+ dev->timer.data = (u_long)dev;
+ dev->timer.expires = jiffies + (HZ/2);
+ dev->timer.function = ahd_linux_dev_timed_unfreeze;
+ add_timer(&dev->timer);
+ break;
+ }
+}
+
+static void
+ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, Scsi_Cmnd *cmd)
+{
+ /*
+ * Typically, the complete queue has very few entries
+ * queued to it before the queue is emptied by
+ * ahd_linux_run_complete_queue, so sorting the entries
+ * by generation number should be inexpensive.
+ * We perform the sort so that commands that complete
+ * with an error are retuned in the order origionally
+ * queued to the controller so that any subsequent retries
+ * are performed in order. The underlying ahd routines do
+ * not guarantee the order that aborted commands will be
+ * returned to us.
+ */
+ struct ahd_completeq *completeq;
+ struct ahd_cmd *list_cmd;
+ struct ahd_cmd *acmd;
+
+ /*
+ * 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.
+ */
+ if (AHD_DV_CMD(cmd) == FALSE) {
+ uint32_t status;
+ u_int new_status;
+
+ status = ahd_cmd_get_transaction_status(cmd);
+ if (status != CAM_REQ_CMP) {
+ struct ahd_linux_device *dev;
+ struct ahd_devinfo devinfo;
+ cam_status cam_status;
+ uint32_t action;
+ u_int scsi_status;
+
+ dev = ahd_linux_get_device(ahd, cmd->channel,
+ cmd->device->id,
+ cmd->device->lun,
+ /*alloc*/FALSE);
+
+ if (dev == NULL)
+ goto no_fallback;
+
+ ahd_compile_devinfo(&devinfo,
+ ahd->our_id,
+ dev->target->target, dev->lun,
+ dev->target->channel == 0 ? 'A':'B',
+ ROLE_INITIATOR);
+
+ scsi_status = ahd_cmd_get_scsi_status(cmd);
+ cam_status = ahd_cmd_get_transaction_status(cmd);
+ action = aic_error_action(cmd, dev->target->inq_data,
+ cam_status, scsi_status);
+ if ((action & SSQ_FALLBACK) != 0) {
+
+ /* Update stats */
+ dev->target->errors_detected++;
+ if (dev->target->cmds_since_error == 0)
+ dev->target->cmds_since_error++;
+ else {
+ dev->target->cmds_since_error = 0;
+ ahd_linux_fallback(ahd, &devinfo);
+ }
+ }
+ }
+no_fallback:
+ switch (status) {
+ 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:
+ /*
+ * If we want the request requeued, make sure there
+ * are sufficent retries. In the old scsi error code,
+ * we used to be able to specify a result code that
+ * bypassed the retry count. Now we must use this
+ * hack. We also "fake" a check condition with
+ * a sense code of ABORTED COMMAND. This seems to
+ * evoke a retry even if this command is being sent
+ * via the eh thread. Ick! Ick! Ick!
+ */
+ if (cmd->retries > 0)
+ cmd->retries--;
+ new_status = DID_OK;
+ ahd_cmd_set_scsi_status(cmd, SCSI_STATUS_CHECK_COND);
+ cmd->result |= (DRIVER_SENSE << 24);
+ memset(cmd->sense_buffer, 0,
+ sizeof(cmd->sense_buffer));
+ cmd->sense_buffer[0] = SSD_ERRCODE_VALID
+ | SSD_CURRENT_ERROR;
+ cmd->sense_buffer[2] = SSD_KEY_ABORTED_COMMAND;
+ break;
+ default:
+ /* We should never get here */
+ new_status = DID_ERROR;
+ break;
+ }
+
+ ahd_cmd_set_transaction_status(cmd, new_status);
+ }
+
+ completeq = &ahd->platform_data->completeq;
+ list_cmd = TAILQ_FIRST(completeq);
+ acmd = (struct ahd_cmd *)cmd;
+ while (list_cmd != NULL
+ && acmd_scsi_cmd(list_cmd).serial_number
+ < acmd_scsi_cmd(acmd).serial_number)
+ list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe);
+ if (list_cmd != NULL)
+ TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe);
+ else
+ TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe);
+}
+
+static void
+ahd_linux_filter_inquiry(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
+{
+ struct scsi_inquiry_data *sid;
+ struct ahd_initiator_tinfo *tinfo;
+ struct ahd_transinfo *user;
+ struct ahd_transinfo *goal;
+ struct ahd_transinfo *curr;
+ struct ahd_tmode_tstate *tstate;
+ struct ahd_linux_device *dev;
+ u_int width;
+ u_int period;
+ u_int offset;
+ u_int ppr_options;
+ u_int trans_version;
+ u_int prot_version;
+ static int warned_user;
+
+ /*
+ * Determine if this lun actually exists. If so,
+ * hold on to its corresponding device structure.
+ * If not, make sure we release the device and
+ * don't bother processing the rest of this inquiry
+ * command.
+ */
+ dev = ahd_linux_get_device(ahd, devinfo->channel - 'A',
+ devinfo->target, devinfo->lun,
+ /*alloc*/TRUE);
+
+ sid = (struct scsi_inquiry_data *)dev->target->inq_data;
+ if (SID_QUAL(sid) == SID_QUAL_LU_CONNECTED) {
+
+ dev->flags &= ~AHD_DEV_UNCONFIGURED;
+ } else {
+ dev->flags |= AHD_DEV_UNCONFIGURED;
+ return;
+ }
+
+ /*
+ * Update our notion of this device's transfer
+ * negotiation capabilities.
+ */
+ tinfo = ahd_fetch_transinfo(ahd, devinfo->channel,
+ devinfo->our_scsiid,
+ devinfo->target, &tstate);
+ user = &tinfo->user;
+ goal = &tinfo->goal;
+ curr = &tinfo->curr;
+ width = user->width;
+ period = user->period;
+ offset = user->offset;
+ ppr_options = user->ppr_options;
+ trans_version = user->transport_version;
+ prot_version = MIN(user->protocol_version, SID_ANSI_REV(sid));
+
+ /*
+ * If we have read streaming info for this controller,
+ * apply it to this target.
+ */
+ if (warned_user == 0
+ && ahd->unit >= NUM_ELEMENTS(aic79xx_rd_strm_info)) {
+
+ printf("aic79xx: WARNING, insufficient rd_strm instances "
+ "for installed controllers. Using defaults\n");
+ printf("aic79xx: Please update the aic79xx_rd_strm_info "
+ "array in the aic79xx_osm.c source file.\n");
+ warned_user++;
+ } else {
+ uint16_t rd_strm_mask;
+
+ rd_strm_mask = aic79xx_rd_strm_info[ahd->unit];
+ if ((rd_strm_mask & devinfo->target_mask) == 0)
+ ppr_options &= ~MSG_EXT_PPR_RD_STRM;
+ }
+
+ /*
+ * Only attempt SPI3/4 once we've verified that
+ * the device claims to support SPI3/4 features.
+ */
+ if (prot_version < SCSI_REV_2)
+ trans_version = SID_ANSI_REV(sid);
+ else
+ trans_version = SCSI_REV_2;
+
+ if ((sid->flags & SID_WBus16) == 0)
+ width = MSG_EXT_WDTR_BUS_8_BIT;
+ if ((sid->flags & SID_Sync) == 0) {
+ period = 0;
+ offset = 0;
+ ppr_options = 0;
+ }
+ if ((sid->spi3data & SID_SPI_QAS) == 0)
+ ppr_options &= ~MSG_EXT_PPR_QAS_REQ;
+ if ((sid->spi3data & SID_SPI_CLOCK_DT) == 0)
+ ppr_options &= MSG_EXT_PPR_QAS_REQ;
+ if ((sid->spi3data & SID_SPI_IUS) == 0)
+ ppr_options &= (MSG_EXT_PPR_DT_REQ
+ | MSG_EXT_PPR_QAS_REQ);
+
+ if (prot_version > SCSI_REV_2
+ && ppr_options != 0)
+ trans_version = user->transport_version;
+
+ ahd_validate_width(ahd, /*tinfo limit*/NULL, &width, ROLE_UNKNOWN);
+ ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_MAX);
+ ahd_validate_offset(ahd, /*tinfo limit*/NULL, period,
+ &offset, width, ROLE_UNKNOWN);
+ if (offset == 0 || period == 0) {
+ period = 0;
+ offset = 0;
+ ppr_options = 0;
+ }
+ /* Apply our filtered user settings. */
+ curr->transport_version = trans_version;
+ curr->protocol_version = prot_version;
+ ahd_set_width(ahd, devinfo, width, AHD_TRANS_GOAL, /*paused*/FALSE);
+ ahd_set_syncrate(ahd, devinfo, period, offset, ppr_options,
+ AHD_TRANS_GOAL, /*paused*/FALSE);
+}
+
+void
+ahd_freeze_simq(struct ahd_softc *ahd)
+{
+ ahd->platform_data->qfrozen++;
+ if (ahd->platform_data->qfrozen == 1) {
+ scsi_block_requests(ahd->platform_data->host);
+ ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS,
+ CAM_LUN_WILDCARD, SCB_LIST_NULL,
+ ROLE_INITIATOR, CAM_REQUEUE_REQ);
+ }
+}
+
+void
+ahd_release_simq(struct ahd_softc *ahd)
+{
+ u_long s;
+ int unblock_reqs;
+
+ unblock_reqs = 0;
+ ahd_lock(ahd, &s);
+ if (ahd->platform_data->qfrozen > 0)
+ ahd->platform_data->qfrozen--;
+ if (ahd->platform_data->qfrozen == 0) {
+ unblock_reqs = 1;
+ }
+ if (AHD_DV_SIMQ_FROZEN(ahd)
+ && ((ahd->platform_data->flags & AHD_DV_WAIT_SIMQ_RELEASE) != 0)) {
+ ahd->platform_data->flags &= ~AHD_DV_WAIT_SIMQ_RELEASE;
+ up(&ahd->platform_data->dv_sem);
+ }
+ ahd_unlock(ahd, &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(ahd->platform_data->host);
+
+ ahd_schedule_runq(ahd);
+}
+
+static void
+ahd_linux_sem_timeout(u_long arg)
+{
+ struct ahd_softc *ahd;
+ u_long s;
+
+ ahd = (struct ahd_softc *)arg;
+ ahd_lock(ahd, &s);
+ if ((ahd->platform_data->flags & AHD_UP_EH_SEMAPHORE) != 0) {
+ ahd->platform_data->flags &= ~AHD_UP_EH_SEMAPHORE;
+ up(&ahd->platform_data->eh_sem);
+ }
+ ahd_unlock(ahd, &s);
+}
+
+static void
+ahd_linux_dev_timed_unfreeze(u_long arg)
+{
+ struct ahd_linux_device *dev;
+ struct ahd_softc *ahd;
+ u_long s;
+
+ dev = (struct ahd_linux_device *)arg;
+ ahd = dev->target->ahd;
+ ahd_lock(ahd, &s);
+ dev->flags &= ~AHD_DEV_TIMER_ACTIVE;
+ if (dev->qfrozen > 0)
+ dev->qfrozen--;
+ if (dev->qfrozen == 0
+ && (dev->flags & AHD_DEV_ON_RUN_LIST) == 0)
+ ahd_linux_run_device_queue(ahd, dev);
+ ahd_unlock(ahd, &s);
+}
+
+void
+ahd_platform_dump_card_state(struct ahd_softc *ahd)
+{
+ struct ahd_linux_device *dev;
+ int target;
+ int maxtarget;
+ int lun;
+ int i;
+
+ maxtarget = (ahd->features & AHD_WIDE) ? 15 : 7;
+ for (target = 0; target <=maxtarget; target++) {
+
+ for (lun = 0; lun < AHD_NUM_LUNS; lun++) {
+ struct ahd_cmd *acmd;
+
+ dev = ahd_linux_get_device(ahd, 0, target,
+ lun, /*alloc*/FALSE);
+ if (dev == NULL)
+ continue;
+
+ printf("DevQ(%d:%d:%d): ", 0, target, lun);
+ i = 0;
+ TAILQ_FOREACH(acmd, &dev->busyq, acmd_links.tqe) {
+ if (i++ > AHD_SCB_MAX)
+ break;
+ }
+ printf("%d waiting\n", i);
+ }
+ }
+}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)