/* * Adaptec AIC7xxx device driver for Linux. * * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $ * * Copyright (c) 1994 John Aycock * The University of Calgary Department of Computer Science. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; see the file COPYING. If not, write to * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. * * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide, * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux, * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual, * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the * ANSI SCSI-2 specification (draft 10c), ... * * -------------------------------------------------------------------------- * * Modifications by Daniel M. Eischen ([email protected]): * * Substantially modified to include support for wide and twin bus * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes, * SCB paging, and other rework of the code. * * -------------------------------------------------------------------------- * Copyright (c) 1994-2000 Justin T. Gibbs. * Copyright (c) 2000-2001 Adaptec Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * substantially similar to the "NO WARRANTY" disclaimer below * ("Disclaimer") and any redistribution must be conditioned upon * including a substantially similar Disclaimer requirement for further * binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names * of any contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * NO WARRANTY * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGES. * *--------------------------------------------------------------------------- * * Thanks also go to (in alphabetical order) the following: * * Rory Bolt - Sequencer bug fixes * Jay Estabrook - Initial DEC Alpha support * Doug Ledford - Much needed abort/reset bug fixes * Kai Makisara - DMAing of SCBs * * A Boot time option was also added for not resetting the scsi bus. * * Form: aic7xxx=extended * aic7xxx=no_reset * aic7xxx=verbose * * Daniel M. Eischen, [email protected], 1/23/97 * * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp */ /* * Further driver modifications made by Doug Ledford <[email protected]> * * Copyright (c) 1997-1999 Doug Ledford * * These changes are released under the same licensing terms as the FreeBSD * driver written by Justin Gibbs. Please see his Copyright notice above * for the exact terms and conditions covering my changes as well as the * warranty statement. * * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include * but are not limited to: * * 1: Import of the latest FreeBSD sequencer code for this driver * 2: Modification of kernel code to accommodate different sequencer semantics * 3: Extensive changes throughout kernel portion of driver to improve * abort/reset processing and error hanndling * 4: Other work contributed by various people on the Internet * 5: Changes to printk information and verbosity selection code * 6: General reliability related changes, especially in IRQ management * 7: Modifications to the default probe/attach order for supported cards * 8: SMP friendliness has been improved * */ #include "aic7xxx_osm.h" #include "aic7xxx_inline.h" #include <scsi/scsicam.h> static struct scsi_transport_template *ahc_linux_transport_template = …; #include <linux/init.h> /* __setup */ #include <linux/mm.h> /* For fetching system memory size */ #include <linux/blkdev.h> /* For block_size() */ #include <linux/delay.h> /* For ssleep/msleep */ #include <linux/slab.h> /* * Set this to the delay in seconds after SCSI bus reset. * Note, we honor this only for the initial bus reset. * The scsi error recovery code performs its own bus settle * delay handling for error recovery actions. */ #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS #define AIC7XXX_RESET_DELAY … #else #define AIC7XXX_RESET_DELAY … #endif /* * To change the default number of tagged transactions allowed per-device, * add a line to the lilo.conf file like: * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" * which will result in the first four devices on the first two * controllers being set to a tagged queue depth of 32. * * The tag_commands is an array of 16 to allow for wide and twin adapters. * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 * for channel 1. */ adapter_tag_info_t; /* * Modify this as you see fit for your system. * * 0 tagged queuing disabled * 1 <= n <= 253 n == max tags ever dispatched. * * The driver will throttle the number of commands dispatched to a * device if it returns queue full. For devices with a fixed maximum * queue depth, the driver will eventually determine this depth and * lock it in (a console message is printed to indicate that a lock * has occurred). On some devices, queue full is returned for a temporary * resource shortage. These devices will return queue full at varying * depths. The driver will throttle back when the queue fulls occur and * attempt to slowly increase the depth over time as the device recovers * from the resource shortage. * * In this example, the first line will disable tagged queueing for all * the devices on the first probed aic7xxx adapter. * * The second line enables tagged queueing with 4 commands/LUN for IDs * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the * driver to attempt to use up to 64 tags for ID 1. * * The third line is the same as the first line. * * The fourth line disables tagged queueing for devices 0 and 3. It * enables tagged queueing for the other IDs, with 16 commands/LUN * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for * IDs 2, 5-7, and 9-15. */ /* * NOTE: The below structure is for reference only, the actual structure * to modify in order to change things is just below this comment block. adapter_tag_info_t aic7xxx_tag_info[] = { {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} }; */ #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE #define AIC7XXX_CMDS_PER_DEVICE … #else #define AIC7XXX_CMDS_PER_DEVICE … #endif #define AIC7XXX_CONFIGED_TAG_COMMANDS … /* * By default, use the number of commands specified by * the users kernel configuration. */ static adapter_tag_info_t aic7xxx_tag_info[] = …; /* * There should be a specific return value for this in scsi.h, but * it seems that most drivers ignore it. */ #define DID_UNDERFLOW … void ahc_print_path(struct ahc_softc *ahc, struct scb *scb) { … } /* * XXX - these options apply unilaterally to _all_ 274x/284x/294x * cards in the system. This should be fixed. Exceptions to this * rule are noted in the comments. */ /* * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This * has no effect on any later resets that might occur due to things like * SCSI bus timeouts. */ static uint32_t aic7xxx_no_reset; /* * Should we force EXTENDED translation on a controller. * 0 == Use whatever is in the SEEPROM or default to off * 1 == Use whatever is in the SEEPROM or default to on */ static uint32_t aic7xxx_extended; /* * PCI bus parity checking of the Adaptec controllers. This is somewhat * dubious at best. To my knowledge, this option has never actually * solved a PCI parity problem, but on certain machines with broken PCI * chipset configurations where stray PCI transactions with bad parity are * the norm rather than the exception, the error messages can be overwhelming. * It's included in the driver for completeness. * 0 = Shut off PCI parity check * non-0 = reverse polarity pci parity checking */ static uint32_t aic7xxx_pci_parity = …; /* * There are lots of broken chipsets in the world. Some of them will * violate the PCI spec when we issue byte sized memory writes to our * controller. I/O mapped register access, if allowed by the given * platform, will work in almost all cases. */ uint32_t aic7xxx_allow_memio = …; /* * So that we can set how long each device is given as a selection timeout. * The table of values goes like this: * 0 - 256ms * 1 - 128ms * 2 - 64ms * 3 - 32ms * We default to 256ms because some older devices need a longer time * to respond to initial selection. */ static uint32_t aic7xxx_seltime; /* * Certain devices do not perform any aging on commands. Should the * device be saturated by commands in one portion of the disk, it is * possible for transactions on far away sectors to never be serviced. * To handle these devices, we can periodically send an ordered tag to * force all outstanding transactions to be serviced prior to a new * transaction. */ static uint32_t aic7xxx_periodic_otag; /* * Module information and settable options. */ static char *aic7xxx = …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_VERSION(…); module_param(aic7xxx, charp, 0444); MODULE_PARM_DESC(…) …; static void ahc_linux_handle_scsi_status(struct ahc_softc *, struct scsi_device *, struct scb *); static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd); static void ahc_linux_freeze_simq(struct ahc_softc *ahc); static void ahc_linux_release_simq(struct ahc_softc *ahc); static int ahc_linux_queue_recovery_cmd(struct scsi_device *sdev, struct scsi_cmnd *cmd); static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc); static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo); static void ahc_linux_device_queue_depth(struct scsi_device *); static int ahc_linux_run_command(struct ahc_softc*, struct ahc_linux_device *, struct scsi_cmnd *); static void ahc_linux_setup_tag_info_global(char *p); static int aic7xxx_setup(char *s); static int ahc_linux_unit; /************************** OS Utility Wrappers *******************************/ void ahc_delay(long usec) { … } /***************************** Low Level I/O **********************************/ uint8_t ahc_inb(struct ahc_softc * ahc, long port) { … } void ahc_outb(struct ahc_softc * ahc, long port, uint8_t val) { … } void ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count) { … } void ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count) { … } /********************************* Inlines ************************************/ static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*); static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len); static void ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb) { … } static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len) { … } /* * Return a string describing the driver. */ static const char * ahc_linux_info(struct Scsi_Host *host) { … } /* * Queue an SCB to the controller. */ static int ahc_linux_queue_lck(struct scsi_cmnd *cmd) { … } static DEF_SCSI_QCMD(ahc_linux_queue) static inline struct scsi_target ** ahc_linux_target_in_softc(struct scsi_target *starget) { … } static int ahc_linux_target_alloc(struct scsi_target *starget) { … } static void ahc_linux_target_destroy(struct scsi_target *starget) { … } static int ahc_linux_slave_alloc(struct scsi_device *sdev) { … } static int ahc_linux_slave_configure(struct scsi_device *sdev) { … } #if defined(__i386__) /* * Return the disk geometry for the given SCSI device. */ static int ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[]) { int heads; int sectors; int cylinders; int extended; struct ahc_softc *ahc; u_int channel; ahc = *((struct ahc_softc **)sdev->host->hostdata); channel = sdev_channel(sdev); if (scsi_partsize(bdev, capacity, geom)) return 0; heads = 64; sectors = 32; cylinders = aic_sector_div(capacity, heads, sectors); if (aic7xxx_extended != 0) extended = 1; else if (channel == 0) extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0; else extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0; if (extended && cylinders >= 1024) { heads = 255; sectors = 63; cylinders = aic_sector_div(capacity, heads, sectors); } geom[0] = heads; geom[1] = sectors; geom[2] = cylinders; return (0); } #endif /* * Abort the current SCSI command(s). */ static int ahc_linux_abort(struct scsi_cmnd *cmd) { … } /* * Attempt to send a target reset message to the device that timed out. */ static int ahc_linux_dev_reset(struct scsi_cmnd *cmd) { … } /* * Reset the SCSI bus. */ static int ahc_linux_bus_reset(struct scsi_cmnd *cmd) { … } struct scsi_host_template aic7xxx_driver_template = …; /**************************** Tasklet Handler *********************************/ static inline unsigned int ahc_build_scsiid(struct ahc_softc *ahc, struct scsi_device *sdev) { … } /******************************** Bus DMA *************************************/ int ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, bus_size_t alignment, bus_size_t boundary, dma_addr_t lowaddr, dma_addr_t highaddr, bus_dma_filter_t *filter, void *filterarg, bus_size_t maxsize, int nsegments, bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) { … } void ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) { … } int ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, int flags, bus_dmamap_t *mapp) { … } void ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, void* vaddr, bus_dmamap_t map) { … } int ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, void *cb_arg, int flags) { … } void ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) { … } int ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) { … } static void ahc_linux_setup_tag_info_global(char *p) { … } static void ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) { … } static char * ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, void (*callback)(u_long, int, int, int32_t), u_long callback_arg) { … } /* * Handle Linux boot parameters. This routine allows for assigning a value * to a parameter with a ':' between the parameter and the value. * ie. aic7xxx=stpwlev:1,extended */ static int aic7xxx_setup(char *s) { … } __setup(…); uint32_t aic7xxx_verbose; int ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template) { … } /* * 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 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) { … } int ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) { … } void ahc_platform_free(struct ahc_softc *ahc) { … } void ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) { … } void ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev, struct ahc_devinfo *devinfo, ahc_queue_alg alg) { … } int ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, int lun, u_int tag, role_t role, uint32_t status) { … } static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) { … } /* * Determines the queue depth for a given device. */ static void ahc_linux_device_queue_depth(struct scsi_device *sdev) { … } static int ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, struct scsi_cmnd *cmd) { … } /* * SCSI controller interrupt handler. */ irqreturn_t ahc_linux_isr(int irq, void *dev_id) { … } void ahc_platform_flushwork(struct ahc_softc *ahc) { … } void ahc_send_async(struct ahc_softc *ahc, char channel, u_int target, u_int lun, ac_code code) { … } /* * Calls the higher level scsi done function and frees the scb. */ void ahc_done(struct ahc_softc *ahc, struct scb *scb) { … } static void ahc_linux_handle_scsi_status(struct ahc_softc *ahc, struct scsi_device *sdev, struct scb *scb) { … } static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd) { … } static void ahc_linux_freeze_simq(struct ahc_softc *ahc) { … } static void ahc_linux_release_simq(struct ahc_softc *ahc) { … } static int ahc_linux_queue_recovery_cmd(struct scsi_device *sdev, struct scsi_cmnd *cmd) { … } static void ahc_linux_set_width(struct scsi_target *starget, int width) { … } static void ahc_linux_set_period(struct scsi_target *starget, int period) { … } static void ahc_linux_set_offset(struct scsi_target *starget, int offset) { … } static void ahc_linux_set_dt(struct scsi_target *starget, int dt) { … } #if 0 /* FIXME: This code claims to support IU and QAS. However, the actual * sequencer code and aic7xxx_core have no support for these parameters and * will get into a bad state if they're negotiated. Do not enable this * unless you know what you're doing */ static void ahc_linux_set_qas(struct scsi_target *starget, int qas) { struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); struct ahc_tmode_tstate *tstate; struct ahc_initiator_tinfo *tinfo = ahc_fetch_transinfo(ahc, starget->channel + 'A', shost->this_id, starget->id, &tstate); struct ahc_devinfo devinfo; unsigned int ppr_options = tinfo->goal.ppr_options & ~MSG_EXT_PPR_QAS_REQ; unsigned int period = tinfo->goal.period; unsigned long flags; struct ahc_syncrate *syncrate; if (qas) ppr_options |= MSG_EXT_PPR_QAS_REQ; ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, starget->channel + 'A', ROLE_INITIATOR); syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); ahc_lock(ahc, &flags); ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, ppr_options, AHC_TRANS_GOAL, FALSE); ahc_unlock(ahc, &flags); } static void ahc_linux_set_iu(struct scsi_target *starget, int iu) { struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); struct ahc_tmode_tstate *tstate; struct ahc_initiator_tinfo *tinfo = ahc_fetch_transinfo(ahc, starget->channel + 'A', shost->this_id, starget->id, &tstate); struct ahc_devinfo devinfo; unsigned int ppr_options = tinfo->goal.ppr_options & ~MSG_EXT_PPR_IU_REQ; unsigned int period = tinfo->goal.period; unsigned long flags; struct ahc_syncrate *syncrate; if (iu) ppr_options |= MSG_EXT_PPR_IU_REQ; ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, starget->channel + 'A', ROLE_INITIATOR); syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); ahc_lock(ahc, &flags); ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, ppr_options, AHC_TRANS_GOAL, FALSE); ahc_unlock(ahc, &flags); } #endif static void ahc_linux_get_signalling(struct Scsi_Host *shost) { … } static struct spi_function_template ahc_linux_transport_functions = …; static int __init ahc_linux_init(void) { … } static void ahc_linux_exit(void) { … } module_init(…) …; module_exit(ahc_linux_exit);
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