brintos / linux-shallow public Read only

1/*2 * Adaptec AIC79xx device driver for Linux.3 *4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $5 *6 * --------------------------------------------------------------------------7 * Copyright (c) 1994-2000 Justin T. Gibbs.8 * Copyright (c) 1997-1999 Doug Ledford9 * Copyright (c) 2000-2003 Adaptec Inc.10 * All rights reserved.11 *12 * Redistribution and use in source and binary forms, with or without13 * modification, are permitted provided that the following conditions14 * are met:15 * 1. Redistributions of source code must retain the above copyright16 *    notice, this list of conditions, and the following disclaimer,17 *    without modification.18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer19 *    substantially similar to the "NO WARRANTY" disclaimer below20 *    ("Disclaimer") and any redistribution must be conditioned upon21 *    including a substantially similar Disclaimer requirement for further22 *    binary redistribution.23 * 3. Neither the names of the above-listed copyright holders nor the names24 *    of any contributors may be used to endorse or promote products derived25 *    from this software without specific prior written permission.26 *27 * Alternatively, this software may be distributed under the terms of the28 * GNU General Public License ("GPL") version 2 as published by the Free29 * Software Foundation.30 *31 * NO WARRANTY32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE42 * POSSIBILITY OF SUCH DAMAGES.43 */44 45#include "aic79xx_osm.h"46#include "aic79xx_inline.h"47#include <scsi/scsicam.h>48 49static struct scsi_transport_template *ahd_linux_transport_template = NULL;50 51#include <linux/init.h>		/* __setup */52#include <linux/mm.h>		/* For fetching system memory size */53#include <linux/blkdev.h>		/* For block_size() */54#include <linux/delay.h>	/* For ssleep/msleep */55#include <linux/device.h>56#include <linux/slab.h>57 58/*59 * Bucket size for counting good commands in between bad ones.60 */61#define AHD_LINUX_ERR_THRESH	100062 63/*64 * Set this to the delay in seconds after SCSI bus reset.65 * Note, we honor this only for the initial bus reset.66 * The scsi error recovery code performs its own bus settle67 * delay handling for error recovery actions.68 */69#ifdef CONFIG_AIC79XX_RESET_DELAY_MS70#define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS71#else72#define AIC79XX_RESET_DELAY 500073#endif74 75/*76 * To change the default number of tagged transactions allowed per-device,77 * add a line to the lilo.conf file like:78 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"79 * which will result in the first four devices on the first two80 * controllers being set to a tagged queue depth of 32.81 *82 * The tag_commands is an array of 16 to allow for wide and twin adapters.83 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-1584 * for channel 1.85 */86typedef struct {87	uint16_t tag_commands[16];	/* Allow for wide/twin adapters. */88} adapter_tag_info_t;89 90/*91 * Modify this as you see fit for your system.92 *93 * 0			tagged queuing disabled94 * 1 <= n <= 253	n == max tags ever dispatched.95 *96 * The driver will throttle the number of commands dispatched to a97 * device if it returns queue full.  For devices with a fixed maximum98 * queue depth, the driver will eventually determine this depth and99 * lock it in (a console message is printed to indicate that a lock100 * has occurred).  On some devices, queue full is returned for a temporary101 * resource shortage.  These devices will return queue full at varying102 * depths.  The driver will throttle back when the queue fulls occur and103 * attempt to slowly increase the depth over time as the device recovers104 * from the resource shortage.105 *106 * In this example, the first line will disable tagged queueing for all107 * the devices on the first probed aic79xx adapter.108 *109 * The second line enables tagged queueing with 4 commands/LUN for IDs110 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the111 * driver to attempt to use up to 64 tags for ID 1.112 *113 * The third line is the same as the first line.114 *115 * The fourth line disables tagged queueing for devices 0 and 3.  It116 * enables tagged queueing for the other IDs, with 16 commands/LUN117 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for118 * IDs 2, 5-7, and 9-15.119 */120 121/*122 * NOTE: The below structure is for reference only, the actual structure123 *       to modify in order to change things is just below this comment block.124adapter_tag_info_t aic79xx_tag_info[] =125{126	{{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},127	{{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},128	{{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},129	{{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}130};131*/132 133#ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE134#define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE135#else136#define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE137#endif138 139#define AIC79XX_CONFIGED_TAG_COMMANDS {					\140	AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,		\141	AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,		\142	AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,		\143	AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,		\144	AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,		\145	AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,		\146	AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,		\147	AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE		\148}149 150/*151 * By default, use the number of commands specified by152 * the users kernel configuration.153 */154static adapter_tag_info_t aic79xx_tag_info[] =155{156	{AIC79XX_CONFIGED_TAG_COMMANDS},157	{AIC79XX_CONFIGED_TAG_COMMANDS},158	{AIC79XX_CONFIGED_TAG_COMMANDS},159	{AIC79XX_CONFIGED_TAG_COMMANDS},160	{AIC79XX_CONFIGED_TAG_COMMANDS},161	{AIC79XX_CONFIGED_TAG_COMMANDS},162	{AIC79XX_CONFIGED_TAG_COMMANDS},163	{AIC79XX_CONFIGED_TAG_COMMANDS},164	{AIC79XX_CONFIGED_TAG_COMMANDS},165	{AIC79XX_CONFIGED_TAG_COMMANDS},166	{AIC79XX_CONFIGED_TAG_COMMANDS},167	{AIC79XX_CONFIGED_TAG_COMMANDS},168	{AIC79XX_CONFIGED_TAG_COMMANDS},169	{AIC79XX_CONFIGED_TAG_COMMANDS},170	{AIC79XX_CONFIGED_TAG_COMMANDS},171	{AIC79XX_CONFIGED_TAG_COMMANDS}172};173 174/*175 * The I/O cell on the chip is very configurable in respect to its analog176 * characteristics.  Set the defaults here; they can be overriden with177 * the proper insmod parameters.178 */179struct ahd_linux_iocell_opts180{181	uint8_t	precomp;182	uint8_t	slewrate;183	uint8_t amplitude;184};185#define AIC79XX_DEFAULT_PRECOMP		0xFF186#define AIC79XX_DEFAULT_SLEWRATE	0xFF187#define AIC79XX_DEFAULT_AMPLITUDE	0xFF188#define AIC79XX_DEFAULT_IOOPTS			\189{						\190	AIC79XX_DEFAULT_PRECOMP,		\191	AIC79XX_DEFAULT_SLEWRATE,		\192	AIC79XX_DEFAULT_AMPLITUDE		\193}194#define AIC79XX_PRECOMP_INDEX	0195#define AIC79XX_SLEWRATE_INDEX	1196#define AIC79XX_AMPLITUDE_INDEX	2197static struct ahd_linux_iocell_opts aic79xx_iocell_info[] __ro_after_init =198{199	AIC79XX_DEFAULT_IOOPTS,200	AIC79XX_DEFAULT_IOOPTS,201	AIC79XX_DEFAULT_IOOPTS,202	AIC79XX_DEFAULT_IOOPTS,203	AIC79XX_DEFAULT_IOOPTS,204	AIC79XX_DEFAULT_IOOPTS,205	AIC79XX_DEFAULT_IOOPTS,206	AIC79XX_DEFAULT_IOOPTS,207	AIC79XX_DEFAULT_IOOPTS,208	AIC79XX_DEFAULT_IOOPTS,209	AIC79XX_DEFAULT_IOOPTS,210	AIC79XX_DEFAULT_IOOPTS,211	AIC79XX_DEFAULT_IOOPTS,212	AIC79XX_DEFAULT_IOOPTS,213	AIC79XX_DEFAULT_IOOPTS,214	AIC79XX_DEFAULT_IOOPTS215};216 217/*218 * There should be a specific return value for this in scsi.h, but219 * it seems that most drivers ignore it.220 */221#define DID_UNDERFLOW   DID_ERROR222 223void224ahd_print_path(struct ahd_softc *ahd, struct scb *scb)225{226	printk("(scsi%d:%c:%d:%d): ",227	       ahd->platform_data->host->host_no,228	       scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',229	       scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,230	       scb != NULL ? SCB_GET_LUN(scb) : -1);231}232 233/*234 * XXX - these options apply unilaterally to _all_ adapters235 *       cards in the system.  This should be fixed.  Exceptions to this236 *       rule are noted in the comments.237 */238 239/*240 * Skip the scsi bus reset.  Non 0 make us skip the reset at startup.  This241 * has no effect on any later resets that might occur due to things like242 * SCSI bus timeouts.243 */244static uint32_t aic79xx_no_reset;245 246/*247 * Should we force EXTENDED translation on a controller.248 *     0 == Use whatever is in the SEEPROM or default to off249 *     1 == Use whatever is in the SEEPROM or default to on250 */251static uint32_t aic79xx_extended;252 253/*254 * PCI bus parity checking of the Adaptec controllers.  This is somewhat255 * dubious at best.  To my knowledge, this option has never actually256 * solved a PCI parity problem, but on certain machines with broken PCI257 * chipset configurations, it can generate tons of false error messages.258 * It's included in the driver for completeness.259 *   0	   = Shut off PCI parity check260 *   non-0 = Enable PCI parity check261 *262 * NOTE: you can't actually pass -1 on the lilo prompt.  So, to set this263 * variable to -1 you would actually want to simply pass the variable264 * name without a number.  That will invert the 0 which will result in265 * -1.266 */267static uint32_t aic79xx_pci_parity = ~0;268 269/*270 * There are lots of broken chipsets in the world.  Some of them will271 * violate the PCI spec when we issue byte sized memory writes to our272 * controller.  I/O mapped register access, if allowed by the given273 * platform, will work in almost all cases.274 */275uint32_t aic79xx_allow_memio = ~0;276 277/*278 * So that we can set how long each device is given as a selection timeout.279 * The table of values goes like this:280 *   0 - 256ms281 *   1 - 128ms282 *   2 - 64ms283 *   3 - 32ms284 * We default to 256ms because some older devices need a longer time285 * to respond to initial selection.286 */287static uint32_t aic79xx_seltime;288 289/*290 * Certain devices do not perform any aging on commands.  Should the291 * device be saturated by commands in one portion of the disk, it is292 * possible for transactions on far away sectors to never be serviced.293 * To handle these devices, we can periodically send an ordered tag to294 * force all outstanding transactions to be serviced prior to a new295 * transaction.296 */297static uint32_t aic79xx_periodic_otag;298 299/* Some storage boxes are using an LSI chip which has a bug making it300 * impossible to use aic79xx Rev B chip in 320 speeds.  The following301 * storage boxes have been reported to be buggy:302 * EonStor 3U 16-Bay: U16U-G3A3303 * EonStor 2U 12-Bay: U12U-G3A3304 * SentinelRAID: 2500F R5 / R6305 * SentinelRAID: 2500F R1306 * SentinelRAID: 2500F/1500F307 * SentinelRAID: 150F308 * 309 * To get around this LSI bug, you can set your board to 160 mode310 * or you can enable the SLOWCRC bit.311 */312uint32_t aic79xx_slowcrc;313 314/*315 * Module information and settable options.316 */317static char *aic79xx = NULL;318 319MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");320MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver");321MODULE_LICENSE("Dual BSD/GPL");322MODULE_VERSION(AIC79XX_DRIVER_VERSION);323module_param(aic79xx, charp, 0444);324MODULE_PARM_DESC(aic79xx,325"period-delimited options string:\n"326"	verbose			Enable verbose/diagnostic logging\n"327"	allow_memio		Allow device registers to be memory mapped\n"328"	debug			Bitmask of debug values to enable\n"329"	no_reset		Suppress initial bus resets\n"330"	extended		Enable extended geometry on all controllers\n"331"	periodic_otag		Send an ordered tagged transaction\n"332"				periodically to prevent tag starvation.\n"333"				This may be required by some older disk\n"334"				or drives/RAID arrays.\n"335"	tag_info:<tag_str>	Set per-target tag depth\n"336"	global_tag_depth:<int>	Global tag depth for all targets on all buses\n"337"	slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"338"	precomp:<pcomp_list>	Set the signal precompensation (0-7).\n"339"	amplitude:<int>		Set the signal amplitude (0-7).\n"340"	seltime:<int>		Selection Timeout:\n"341"				(0/256ms,1/128ms,2/64ms,3/32ms)\n"342"	slowcrc			Turn on the SLOWCRC bit (Rev B only)\n"		 343"\n"344"	Sample modprobe configuration file:\n"345"	#	Enable verbose logging\n"346"	#	Set tag depth on Controller 2/Target 2 to 10 tags\n"347"	#	Shorten the selection timeout to 128ms\n"348"\n"349"	options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"350);351 352static void ahd_linux_handle_scsi_status(struct ahd_softc *,353					 struct scsi_device *,354					 struct scb *);355static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,356					 struct scsi_cmnd *cmd);357static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);358static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);359static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,360				     struct ahd_devinfo *devinfo);361static void ahd_linux_device_queue_depth(struct scsi_device *);362static int ahd_linux_run_command(struct ahd_softc*,363				 struct ahd_linux_device *,364				 struct scsi_cmnd *);365static void ahd_linux_setup_tag_info_global(char *p);366static int  aic79xx_setup(char *c);367static void ahd_freeze_simq(struct ahd_softc *ahd);368static void ahd_release_simq(struct ahd_softc *ahd);369 370static int ahd_linux_unit;371 372 373/************************** OS Utility Wrappers *******************************/374void ahd_delay(long);375void376ahd_delay(long usec)377{378	/*379	 * udelay on Linux can have problems for380	 * multi-millisecond waits.  Wait at most381	 * 1024us per call.382	 */383	while (usec > 0) {384		udelay(usec % 1024);385		usec -= 1024;386	}387}388 389 390/***************************** Low Level I/O **********************************/391uint8_t ahd_inb(struct ahd_softc * ahd, long port);392void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);393void ahd_outw_atomic(struct ahd_softc * ahd,394				     long port, uint16_t val);395void ahd_outsb(struct ahd_softc * ahd, long port,396			       uint8_t *, int count);397void ahd_insb(struct ahd_softc * ahd, long port,398			       uint8_t *, int count);399 400uint8_t401ahd_inb(struct ahd_softc * ahd, long port)402{403	uint8_t x;404 405	if (ahd->tags[0] == BUS_SPACE_MEMIO) {406		x = readb(ahd->bshs[0].maddr + port);407	} else {408		x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));409	}410	mb();411	return (x);412}413 414#if 0 /* unused */415static uint16_t416ahd_inw_atomic(struct ahd_softc * ahd, long port)417{418	uint8_t x;419 420	if (ahd->tags[0] == BUS_SPACE_MEMIO) {421		x = readw(ahd->bshs[0].maddr + port);422	} else {423		x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));424	}425	mb();426	return (x);427}428#endif429 430void431ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)432{433	if (ahd->tags[0] == BUS_SPACE_MEMIO) {434		writeb(val, ahd->bshs[0].maddr + port);435	} else {436		outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));437	}438	mb();439}440 441void442ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)443{444	if (ahd->tags[0] == BUS_SPACE_MEMIO) {445		writew(val, ahd->bshs[0].maddr + port);446	} else {447		outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));448	}449	mb();450}451 452void453ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)454{455	int i;456 457	/*458	 * There is probably a more efficient way to do this on Linux459	 * but we don't use this for anything speed critical and this460	 * should work.461	 */462	for (i = 0; i < count; i++)463		ahd_outb(ahd, port, *array++);464}465 466void467ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)468{469	int i;470 471	/*472	 * There is probably a more efficient way to do this on Linux473	 * but we don't use this for anything speed critical and this474	 * should work.475	 */476	for (i = 0; i < count; i++)477		*array++ = ahd_inb(ahd, port);478}479 480/******************************* PCI Routines *********************************/481uint32_t482ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)483{484	switch (width) {485	case 1:486	{487		uint8_t retval;488 489		pci_read_config_byte(pci, reg, &retval);490		return (retval);491	}492	case 2:493	{494		uint16_t retval;495		pci_read_config_word(pci, reg, &retval);496		return (retval);497	}498	case 4:499	{500		uint32_t retval;501		pci_read_config_dword(pci, reg, &retval);502		return (retval);503	}504	default:505		panic("ahd_pci_read_config: Read size too big");506		/* NOTREACHED */507		return (0);508	}509}510 511void512ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)513{514	switch (width) {515	case 1:516		pci_write_config_byte(pci, reg, value);517		break;518	case 2:519		pci_write_config_word(pci, reg, value);520		break;521	case 4:522		pci_write_config_dword(pci, reg, value);523		break;524	default:525		panic("ahd_pci_write_config: Write size too big");526		/* NOTREACHED */527	}528}529 530/****************************** Inlines ***************************************/531static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);532 533static void534ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)535{536	struct scsi_cmnd *cmd;537 538	cmd = scb->io_ctx;539	if (cmd) {540		ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);541		scsi_dma_unmap(cmd);542	}543}544 545/******************************** Macros **************************************/546static inline unsigned int ahd_build_scsiid(struct ahd_softc *ahd,547					    struct scsi_device *sdev)548{549	return ((sdev_id(sdev) << TID_SHIFT) & TID) | (ahd)->our_id;550}551 552/*553 * Return a string describing the driver.554 */555static const char *556ahd_linux_info(struct Scsi_Host *host)557{558	static char buffer[512];559	char	ahd_info[256];560	char   *bp;561	struct ahd_softc *ahd;562 563	bp = &buffer[0];564	ahd = *(struct ahd_softc **)host->hostdata;565	memset(bp, 0, sizeof(buffer));566	strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n"567			"        <");568	strcat(bp, ahd->description);569	strcat(bp, ">\n"570			"        ");571	ahd_controller_info(ahd, ahd_info);572	strcat(bp, ahd_info);573 574	return (bp);575}576 577/*578 * Queue an SCB to the controller.579 */580static int ahd_linux_queue_lck(struct scsi_cmnd *cmd)581{582	struct	 ahd_softc *ahd;583	struct	 ahd_linux_device *dev = scsi_transport_device_data(cmd->device);584	int rtn = SCSI_MLQUEUE_HOST_BUSY;585 586	ahd = *(struct ahd_softc **)cmd->device->host->hostdata;587 588	cmd->result = CAM_REQ_INPROG << 16;589	rtn = ahd_linux_run_command(ahd, dev, cmd);590 591	return rtn;592}593 594static DEF_SCSI_QCMD(ahd_linux_queue)595 596static struct scsi_target **597ahd_linux_target_in_softc(struct scsi_target *starget)598{599	struct	ahd_softc *ahd =600		*((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);601	unsigned int target_offset;602 603	target_offset = starget->id;604	if (starget->channel != 0)605		target_offset += 8;606 607	return &ahd->platform_data->starget[target_offset];608}609 610static int611ahd_linux_target_alloc(struct scsi_target *starget)612{613	struct	ahd_softc *ahd =614		*((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);615	struct seeprom_config *sc = ahd->seep_config;616	unsigned long flags;617	struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);618	struct ahd_devinfo devinfo;619	struct ahd_initiator_tinfo *tinfo;620	struct ahd_tmode_tstate *tstate;621	char channel = starget->channel + 'A';622 623	ahd_lock(ahd, &flags);624 625	BUG_ON(*ahd_targp != NULL);626 627	*ahd_targp = starget;628 629	if (sc) {630		int flags = sc->device_flags[starget->id];631 632		tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,633					    starget->id, &tstate);634 635		if ((flags  & CFPACKETIZED) == 0) {636			/* don't negotiate packetized (IU) transfers */637			spi_max_iu(starget) = 0;638		} else {639			if ((ahd->features & AHD_RTI) == 0)640				spi_rti(starget) = 0;641		}642 643		if ((flags & CFQAS) == 0)644			spi_max_qas(starget) = 0;645 646		/* Transinfo values have been set to BIOS settings */647		spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;648		spi_min_period(starget) = tinfo->user.period;649		spi_max_offset(starget) = tinfo->user.offset;650	}651 652	tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,653				    starget->id, &tstate);654	ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,655			    CAM_LUN_WILDCARD, channel,656			    ROLE_INITIATOR);657	ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,658			 AHD_TRANS_GOAL, /*paused*/FALSE);659	ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,660		      AHD_TRANS_GOAL, /*paused*/FALSE);661	ahd_unlock(ahd, &flags);662 663	return 0;664}665 666static void667ahd_linux_target_destroy(struct scsi_target *starget)668{669	struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);670 671	*ahd_targp = NULL;672}673 674static int675ahd_linux_slave_alloc(struct scsi_device *sdev)676{677	struct	ahd_softc *ahd =678		*((struct ahd_softc **)sdev->host->hostdata);679	struct ahd_linux_device *dev;680 681	if (bootverbose)682		printk("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);683 684	dev = scsi_transport_device_data(sdev);685	memset(dev, 0, sizeof(*dev));686 687	/*688	 * We start out life using untagged689	 * transactions of which we allow one.690	 */691	dev->openings = 1;692 693	/*694	 * Set maxtags to 0.  This will be changed if we695	 * later determine that we are dealing with696	 * a tagged queuing capable device.697	 */698	dev->maxtags = 0;699	700	return (0);701}702 703static int704ahd_linux_slave_configure(struct scsi_device *sdev)705{706	if (bootverbose)707		sdev_printk(KERN_INFO, sdev, "Slave Configure\n");708 709	ahd_linux_device_queue_depth(sdev);710 711	/* Initial Domain Validation */712	if (!spi_initial_dv(sdev->sdev_target))713		spi_dv_device(sdev);714 715	return 0;716}717 718#if defined(__i386__)719/*720 * Return the disk geometry for the given SCSI device.721 */722static int723ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,724		    sector_t capacity, int geom[])725{726	int	 heads;727	int	 sectors;728	int	 cylinders;729	int	 extended;730	struct	 ahd_softc *ahd;731 732	ahd = *((struct ahd_softc **)sdev->host->hostdata);733 734	if (scsi_partsize(bdev, capacity, geom))735		return 0;736 737	heads = 64;738	sectors = 32;739	cylinders = aic_sector_div(capacity, heads, sectors);740 741	if (aic79xx_extended != 0)742		extended = 1;743	else744		extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;745	if (extended && cylinders >= 1024) {746		heads = 255;747		sectors = 63;748		cylinders = aic_sector_div(capacity, heads, sectors);749	}750	geom[0] = heads;751	geom[1] = sectors;752	geom[2] = cylinders;753	return (0);754}755#endif756 757/*758 * Abort the current SCSI command(s).759 */760static int761ahd_linux_abort(struct scsi_cmnd *cmd)762{763	return ahd_linux_queue_abort_cmd(cmd);764}765 766/*767 * Attempt to send a target reset message to the device that timed out.768 */769static int770ahd_linux_dev_reset(struct scsi_cmnd *cmd)771{772	struct ahd_softc *ahd;773	struct ahd_linux_device *dev;774	struct scb *reset_scb;775	u_int  cdb_byte;776	int    retval = SUCCESS;777	struct	ahd_initiator_tinfo *tinfo;778	struct	ahd_tmode_tstate *tstate;779	unsigned long flags;780	DECLARE_COMPLETION_ONSTACK(done);781 782	reset_scb = NULL;783 784	ahd = *(struct ahd_softc **)cmd->device->host->hostdata;785 786	scmd_printk(KERN_INFO, cmd,787		    "Attempting to queue a TARGET RESET message:");788 789	printk("CDB:");790	for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)791		printk(" 0x%x", cmd->cmnd[cdb_byte]);792	printk("\n");793 794	/*795	 * Determine if we currently own this command.796	 */797	dev = scsi_transport_device_data(cmd->device);798 799	if (dev == NULL) {800		/*801		 * No target device for this command exists,802		 * so we must not still own the command.803		 */804		scmd_printk(KERN_INFO, cmd, "Is not an active device\n");805		return SUCCESS;806	}807 808	/*809	 * Generate us a new SCB810	 */811	reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);812	if (!reset_scb) {813		scmd_printk(KERN_INFO, cmd, "No SCB available\n");814		return FAILED;815	}816 817	tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,818				    cmd->device->id, &tstate);819	reset_scb->io_ctx = NULL;820	reset_scb->platform_data->dev = dev;821	reset_scb->sg_count = 0;822	ahd_set_residual(reset_scb, 0);823	ahd_set_sense_residual(reset_scb, 0);824	reset_scb->platform_data->xfer_len = 0;825	reset_scb->hscb->control = 0;826	reset_scb->hscb->scsiid = ahd_build_scsiid(ahd, cmd->device);827	reset_scb->hscb->lun = cmd->device->lun;828	reset_scb->hscb->cdb_len = 0;829	reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;830	reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;831	if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {832		reset_scb->flags |= SCB_PACKETIZED;833	} else {834		reset_scb->hscb->control |= MK_MESSAGE;835	}836	dev->openings--;837	dev->active++;838	dev->commands_issued++;839 840	ahd_lock(ahd, &flags);841 842	LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);843	ahd_queue_scb(ahd, reset_scb);844 845	ahd->platform_data->eh_done = &done;846	ahd_unlock(ahd, &flags);847 848	printk("%s: Device reset code sleeping\n", ahd_name(ahd));849	if (!wait_for_completion_timeout(&done, 5 * HZ)) {850		ahd_lock(ahd, &flags);851		ahd->platform_data->eh_done = NULL;852		ahd_unlock(ahd, &flags);853		printk("%s: Device reset timer expired (active %d)\n",854		       ahd_name(ahd), dev->active);855		retval = FAILED;856	}857	printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);858 859	return (retval);860}861 862/*863 * Reset the SCSI bus.864 */865static int866ahd_linux_bus_reset(struct scsi_cmnd *cmd)867{868	struct ahd_softc *ahd;869	int    found;870	unsigned long flags;871 872	ahd = *(struct ahd_softc **)cmd->device->host->hostdata;873#ifdef AHD_DEBUG874	if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)875		printk("%s: Bus reset called for cmd %p\n",876		       ahd_name(ahd), cmd);877#endif878	ahd_lock(ahd, &flags);879 880	found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',881				  /*initiate reset*/TRUE);882	ahd_unlock(ahd, &flags);883 884	if (bootverbose)885		printk("%s: SCSI bus reset delivered. "886		       "%d SCBs aborted.\n", ahd_name(ahd), found);887 888	return (SUCCESS);889}890 891struct scsi_host_template aic79xx_driver_template = {892	.module			= THIS_MODULE,893	.name			= "aic79xx",894	.proc_name		= "aic79xx",895	.show_info		= ahd_linux_show_info,896	.write_info	 	= ahd_proc_write_seeprom,897	.info			= ahd_linux_info,898	.queuecommand		= ahd_linux_queue,899	.eh_abort_handler	= ahd_linux_abort,900	.eh_device_reset_handler = ahd_linux_dev_reset,901	.eh_bus_reset_handler	= ahd_linux_bus_reset,902#if defined(__i386__)903	.bios_param		= ahd_linux_biosparam,904#endif905	.can_queue		= AHD_MAX_QUEUE,906	.this_id		= -1,907	.max_sectors		= 8192,908	.cmd_per_lun		= 2,909	.slave_alloc		= ahd_linux_slave_alloc,910	.slave_configure	= ahd_linux_slave_configure,911	.target_alloc		= ahd_linux_target_alloc,912	.target_destroy		= ahd_linux_target_destroy,913};914 915/******************************** Bus DMA *************************************/916int917ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,918		   bus_size_t alignment, bus_size_t boundary,919		   dma_addr_t lowaddr, dma_addr_t highaddr,920		   bus_dma_filter_t *filter, void *filterarg,921		   bus_size_t maxsize, int nsegments,922		   bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)923{924	bus_dma_tag_t dmat;925 926	dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);927	if (dmat == NULL)928		return (ENOMEM);929 930	/*931	 * Linux is very simplistic about DMA memory.  For now don't932	 * maintain all specification information.  Once Linux supplies933	 * better facilities for doing these operations, or the934	 * needs of this particular driver change, we might need to do935	 * more here.936	 */937	dmat->alignment = alignment;938	dmat->boundary = boundary;939	dmat->maxsize = maxsize;940	*ret_tag = dmat;941	return (0);942}943 944void945ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)946{947	kfree(dmat);948}949 950int951ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,952		 int flags, bus_dmamap_t *mapp)953{954	*vaddr = dma_alloc_coherent(&ahd->dev_softc->dev, dmat->maxsize, mapp,955				    GFP_ATOMIC);956	if (*vaddr == NULL)957		return (ENOMEM);958	return(0);959}960 961void962ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,963		void* vaddr, bus_dmamap_t map)964{965	dma_free_coherent(&ahd->dev_softc->dev, dmat->maxsize, vaddr, map);966}967 968int969ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,970		void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,971		void *cb_arg, int flags)972{973	/*974	 * Assume for now that this will only be used during975	 * initialization and not for per-transaction buffer mapping.976	 */977	bus_dma_segment_t stack_sg;978 979	stack_sg.ds_addr = map;980	stack_sg.ds_len = dmat->maxsize;981	cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);982	return (0);983}984 985void986ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)987{988}989 990int991ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)992{993	/* Nothing to do */994	return (0);995}996 997/********************* Platform Dependent Functions ***************************/998static void999ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)1000{1001 1002	if ((instance >= 0)1003	 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {1004		uint8_t *iocell_info;1005 1006		iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];1007		iocell_info[index] = value & 0xFFFF;1008		if (bootverbose)1009			printk("iocell[%d:%ld] = %d\n", instance, index, value);1010	}1011}1012 1013static void1014ahd_linux_setup_tag_info_global(char *p)1015{1016	int tags, i, j;1017 1018	tags = simple_strtoul(p + 1, NULL, 0) & 0xff;1019	printk("Setting Global Tags= %d\n", tags);1020 1021	for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {1022		for (j = 0; j < AHD_NUM_TARGETS; j++) {1023			aic79xx_tag_info[i].tag_commands[j] = tags;1024		}1025	}1026}1027 1028static void1029ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)1030{1031 1032	if ((instance >= 0) && (targ >= 0)1033	 && (instance < ARRAY_SIZE(aic79xx_tag_info))1034	 && (targ < AHD_NUM_TARGETS)) {1035		aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;1036		if (bootverbose)1037			printk("tag_info[%d:%d] = %d\n", instance, targ, value);1038	}1039}1040 1041static char *1042ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,1043		       void (*callback)(u_long, int, int, int32_t),1044		       u_long callback_arg)1045{1046	char	*tok_end;1047	char	*tok_end2;1048	int      i;1049	int      instance;1050	int	 targ;1051	int	 done;1052	char	 tok_list[] = {'.', ',', '{', '}', '\0'};1053 1054	/* All options use a ':' name/arg separator */1055	if (*opt_arg != ':')1056		return (opt_arg);1057	opt_arg++;1058	instance = -1;1059	targ = -1;1060	done = FALSE;1061	/*1062	 * Restore separator that may be in1063	 * the middle of our option argument.1064	 */1065	tok_end = strchr(opt_arg, '\0');1066	if (tok_end < end)1067		*tok_end = ',';1068	while (!done) {1069		switch (*opt_arg) {1070		case '{':1071			if (instance == -1) {1072				instance = 0;1073			} else {1074				if (depth > 1) {1075					if (targ == -1)1076						targ = 0;1077				} else {1078					printk("Malformed Option %s\n",1079					       opt_name);1080					done = TRUE;1081				}1082			}1083			opt_arg++;1084			break;1085		case '}':1086			if (targ != -1)1087				targ = -1;1088			else if (instance != -1)1089				instance = -1;1090			opt_arg++;1091			break;1092		case ',':1093		case '.':1094			if (instance == -1)1095				done = TRUE;1096			else if (targ >= 0)1097				targ++;1098			else if (instance >= 0)1099				instance++;1100			opt_arg++;1101			break;1102		case '\0':1103			done = TRUE;1104			break;1105		default:1106			tok_end = end;1107			for (i = 0; tok_list[i]; i++) {1108				tok_end2 = strchr(opt_arg, tok_list[i]);1109				if ((tok_end2) && (tok_end2 < tok_end))1110					tok_end = tok_end2;1111			}1112			callback(callback_arg, instance, targ,1113				 simple_strtol(opt_arg, NULL, 0));1114			opt_arg = tok_end;1115			break;1116		}1117	}1118	return (opt_arg);1119}1120 1121/*1122 * Handle Linux boot parameters. This routine allows for assigning a value1123 * to a parameter with a ':' between the parameter and the value.1124 * ie. aic79xx=stpwlev:1,extended1125 */1126static int1127aic79xx_setup(char *s)1128{1129	int	i, n;1130	char   *p;1131	char   *end;1132 1133	static const struct {1134		const char *name;1135		uint32_t *flag;1136	} options[] = {1137		{ "extended", &aic79xx_extended },1138		{ "no_reset", &aic79xx_no_reset },1139		{ "verbose", &aic79xx_verbose },1140		{ "allow_memio", &aic79xx_allow_memio},1141#ifdef AHD_DEBUG1142		{ "debug", &ahd_debug },1143#endif1144		{ "periodic_otag", &aic79xx_periodic_otag },1145		{ "pci_parity", &aic79xx_pci_parity },1146		{ "seltime", &aic79xx_seltime },1147		{ "tag_info", NULL },1148		{ "global_tag_depth", NULL},1149		{ "slewrate", NULL },1150		{ "precomp", NULL },1151		{ "amplitude", NULL },1152		{ "slowcrc", &aic79xx_slowcrc },1153	};1154 1155	end = strchr(s, '\0');1156 1157	/*1158	 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE1159	 * will never be 0 in this case.1160	 */1161	n = 0;1162 1163	while ((p = strsep(&s, ",.")) != NULL) {1164		if (*p == '\0')1165			continue;1166		for (i = 0; i < ARRAY_SIZE(options); i++) {1167 1168			n = strlen(options[i].name);1169			if (strncmp(options[i].name, p, n) == 0)1170				break;1171		}1172		if (i == ARRAY_SIZE(options))1173			continue;1174 1175		if (strncmp(p, "global_tag_depth", n) == 0) {1176			ahd_linux_setup_tag_info_global(p + n);1177		} else if (strncmp(p, "tag_info", n) == 0) {1178			s = ahd_parse_brace_option("tag_info", p + n, end,1179			    2, ahd_linux_setup_tag_info, 0);1180		} else if (strncmp(p, "slewrate", n) == 0) {1181			s = ahd_parse_brace_option("slewrate",1182			    p + n, end, 1, ahd_linux_setup_iocell_info,1183			    AIC79XX_SLEWRATE_INDEX);1184		} else if (strncmp(p, "precomp", n) == 0) {1185			s = ahd_parse_brace_option("precomp",1186			    p + n, end, 1, ahd_linux_setup_iocell_info,1187			    AIC79XX_PRECOMP_INDEX);1188		} else if (strncmp(p, "amplitude", n) == 0) {1189			s = ahd_parse_brace_option("amplitude",1190			    p + n, end, 1, ahd_linux_setup_iocell_info,1191			    AIC79XX_AMPLITUDE_INDEX);1192		} else if (p[n] == ':') {1193			*(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);1194		} else if (!strncmp(p, "verbose", n)) {1195			*(options[i].flag) = 1;1196		} else {1197			*(options[i].flag) ^= 0xFFFFFFFF;1198		}1199	}1200	return 1;1201}1202 1203__setup("aic79xx=", aic79xx_setup);1204 1205uint32_t aic79xx_verbose;1206 1207int1208ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)1209{1210	char	buf[80];1211	struct	Scsi_Host *host;1212	char	*new_name;1213	u_long	s;1214	int	retval;1215 1216	template->name = ahd->description;1217	host = scsi_host_alloc(template, sizeof(struct ahd_softc *));1218	if (host == NULL)1219		return (ENOMEM);1220 1221	*((struct ahd_softc **)host->hostdata) = ahd;1222	ahd->platform_data->host = host;1223	host->can_queue = AHD_MAX_QUEUE;1224	host->cmd_per_lun = 2;1225	host->sg_tablesize = AHD_NSEG;1226	host->this_id = ahd->our_id;1227	host->irq = ahd->platform_data->irq;1228	host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;1229	host->max_lun = AHD_NUM_LUNS;1230	host->max_channel = 0;1231	host->sg_tablesize = AHD_NSEG;1232	ahd_lock(ahd, &s);1233	ahd_set_unit(ahd, ahd_linux_unit++);1234	ahd_unlock(ahd, &s);1235	sprintf(buf, "scsi%d", host->host_no);1236	new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);1237	if (new_name != NULL) {1238		strcpy(new_name, buf);1239		ahd_set_name(ahd, new_name);1240	}1241	host->unique_id = ahd->unit;1242	ahd_linux_initialize_scsi_bus(ahd);1243	ahd_intr_enable(ahd, TRUE);1244 1245	host->transportt = ahd_linux_transport_template;1246 1247	retval = scsi_add_host(host, &ahd->dev_softc->dev);1248	if (retval) {1249		printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");1250		scsi_host_put(host);1251		return retval;1252	}1253 1254	scsi_scan_host(host);1255	return 0;1256}1257 1258/*1259 * Place the SCSI bus into a known state by either resetting it,1260 * or forcing transfer negotiations on the next command to any1261 * target.1262 */1263static void1264ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)1265{1266	u_int target_id;1267	u_int numtarg;1268	unsigned long s;1269 1270	target_id = 0;1271	numtarg = 0;1272 1273	if (aic79xx_no_reset != 0)1274		ahd->flags &= ~AHD_RESET_BUS_A;1275 1276	if ((ahd->flags & AHD_RESET_BUS_A) != 0)1277		ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);1278	else1279		numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;1280 1281	ahd_lock(ahd, &s);1282 1283	/*1284	 * Force negotiation to async for all targets that1285	 * will not see an initial bus reset.1286	 */1287	for (; target_id < numtarg; target_id++) {1288		struct ahd_devinfo devinfo;1289		struct ahd_initiator_tinfo *tinfo;1290		struct ahd_tmode_tstate *tstate;1291 1292		tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,1293					    target_id, &tstate);1294		ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,1295				    CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);1296		ahd_update_neg_request(ahd, &devinfo, tstate,1297				       tinfo, AHD_NEG_ALWAYS);1298	}1299	ahd_unlock(ahd, &s);1300	/* Give the bus some time to recover */1301	if ((ahd->flags & AHD_RESET_BUS_A) != 0) {1302		ahd_freeze_simq(ahd);1303		msleep(AIC79XX_RESET_DELAY);1304		ahd_release_simq(ahd);1305	}1306}1307 1308int1309ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)1310{1311	ahd->platform_data =1312	    kzalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC);1313	if (ahd->platform_data == NULL)1314		return (ENOMEM);1315	ahd->platform_data->irq = AHD_LINUX_NOIRQ;1316	ahd_lockinit(ahd);1317	ahd->seltime = (aic79xx_seltime & 0x3) << 4;1318	return (0);1319}1320 1321void1322ahd_platform_free(struct ahd_softc *ahd)1323{1324	struct scsi_target *starget;1325	int i;1326 1327	if (ahd->platform_data != NULL) {1328		/* destroy all of the device and target objects */1329		for (i = 0; i < AHD_NUM_TARGETS; i++) {1330			starget = ahd->platform_data->starget[i];1331			if (starget != NULL) {1332				ahd->platform_data->starget[i] = NULL;1333			}1334		}1335 1336		if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)1337			free_irq(ahd->platform_data->irq, ahd);1338		if (ahd->tags[0] == BUS_SPACE_PIO1339		 && ahd->bshs[0].ioport != 0)1340			release_region(ahd->bshs[0].ioport, 256);1341		if (ahd->tags[1] == BUS_SPACE_PIO1342		 && ahd->bshs[1].ioport != 0)1343			release_region(ahd->bshs[1].ioport, 256);1344		if (ahd->tags[0] == BUS_SPACE_MEMIO1345		 && ahd->bshs[0].maddr != NULL) {1346			iounmap(ahd->bshs[0].maddr);1347			release_mem_region(ahd->platform_data->mem_busaddr,1348					   0x1000);1349		}1350		if (ahd->platform_data->host)1351			scsi_host_put(ahd->platform_data->host);1352 1353		kfree(ahd->platform_data);1354	}1355}1356 1357void1358ahd_platform_init(struct ahd_softc *ahd)1359{1360	/*1361	 * Lookup and commit any modified IO Cell options.1362	 */1363	if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {1364		const struct ahd_linux_iocell_opts *iocell_opts;1365 1366		iocell_opts = &aic79xx_iocell_info[ahd->unit];1367		if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)1368			AHD_SET_PRECOMP(ahd, iocell_opts->precomp);1369		if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)1370			AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);1371		if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)1372			AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);1373	}1374 1375}1376 1377void1378ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)1379{1380	ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),1381				SCB_GET_CHANNEL(ahd, scb),1382				SCB_GET_LUN(scb), SCB_LIST_NULL,1383				ROLE_UNKNOWN, CAM_REQUEUE_REQ);1384}1385 1386void1387ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,1388		      struct ahd_devinfo *devinfo, ahd_queue_alg alg)1389{1390	struct ahd_linux_device *dev;1391	int was_queuing;1392	int now_queuing;1393 1394	if (sdev == NULL)1395		return;1396 1397	dev = scsi_transport_device_data(sdev);1398 1399	if (dev == NULL)1400		return;1401	was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);1402	switch (alg) {1403	default:1404	case AHD_QUEUE_NONE:1405		now_queuing = 0;1406		break; 1407	case AHD_QUEUE_BASIC:1408		now_queuing = AHD_DEV_Q_BASIC;1409		break;1410	case AHD_QUEUE_TAGGED:1411		now_queuing = AHD_DEV_Q_TAGGED;1412		break;1413	}1414	if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 01415	 && (was_queuing != now_queuing)1416	 && (dev->active != 0)) {1417		dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;1418		dev->qfrozen++;1419	}1420 1421	dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);1422	if (now_queuing) {1423		u_int usertags;1424 1425		usertags = ahd_linux_user_tagdepth(ahd, devinfo);1426		if (!was_queuing) {1427			/*1428			 * Start out aggressively and allow our1429			 * dynamic queue depth algorithm to take1430			 * care of the rest.1431			 */1432			dev->maxtags = usertags;1433			dev->openings = dev->maxtags - dev->active;1434		}1435		if (dev->maxtags == 0) {1436			/*1437			 * Queueing is disabled by the user.1438			 */1439			dev->openings = 1;1440		} else if (alg == AHD_QUEUE_TAGGED) {1441			dev->flags |= AHD_DEV_Q_TAGGED;1442			if (aic79xx_periodic_otag != 0)1443				dev->flags |= AHD_DEV_PERIODIC_OTAG;1444		} else1445			dev->flags |= AHD_DEV_Q_BASIC;1446	} else {1447		/* We can only have one opening. */1448		dev->maxtags = 0;1449		dev->openings =  1 - dev->active;1450	}1451 1452	switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {1453	case AHD_DEV_Q_BASIC:1454	case AHD_DEV_Q_TAGGED:1455		scsi_change_queue_depth(sdev,1456				dev->openings + dev->active);1457		break;1458	default:1459		/*1460		 * We allow the OS to queue 2 untagged transactions to1461		 * us at any time even though we can only execute them1462		 * serially on the controller/device.  This should1463		 * remove some latency.1464		 */1465		scsi_change_queue_depth(sdev, 1);1466		break;1467	}1468}1469 1470int1471ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,1472			int lun, u_int tag, role_t role, uint32_t status)1473{1474	return 0;1475}1476 1477static u_int1478ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)1479{1480	static int warned_user;1481	u_int tags;1482 1483	tags = 0;1484	if ((ahd->user_discenable & devinfo->target_mask) != 0) {1485		if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {1486 1487			if (warned_user == 0) {1488				printk(KERN_WARNING1489"aic79xx: WARNING: Insufficient tag_info instances\n"1490"aic79xx: for installed controllers.  Using defaults\n"1491"aic79xx: Please update the aic79xx_tag_info array in\n"1492"aic79xx: the aic79xx_osm.c source file.\n");1493				warned_user++;1494			}1495			tags = AHD_MAX_QUEUE;1496		} else {1497			adapter_tag_info_t *tag_info;1498 1499			tag_info = &aic79xx_tag_info[ahd->unit];1500			tags = tag_info->tag_commands[devinfo->target_offset];1501			if (tags > AHD_MAX_QUEUE)1502				tags = AHD_MAX_QUEUE;1503		}1504	}1505	return (tags);1506}1507 1508/*1509 * Determines the queue depth for a given device.1510 */1511static void1512ahd_linux_device_queue_depth(struct scsi_device *sdev)1513{1514	struct	ahd_devinfo devinfo;1515	u_int	tags;1516	struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);1517 1518	ahd_compile_devinfo(&devinfo,1519			    ahd->our_id,1520			    sdev->sdev_target->id, sdev->lun,1521			    sdev->sdev_target->channel == 0 ? 'A' : 'B',1522			    ROLE_INITIATOR);1523	tags = ahd_linux_user_tagdepth(ahd, &devinfo);1524	if (tags != 0 && sdev->tagged_supported != 0) {1525 1526		ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);1527		ahd_send_async(ahd, devinfo.channel, devinfo.target,1528			       devinfo.lun, AC_TRANSFER_NEG);1529		ahd_print_devinfo(ahd, &devinfo);1530		printk("Tagged Queuing enabled.  Depth %d\n", tags);1531	} else {1532		ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);1533		ahd_send_async(ahd, devinfo.channel, devinfo.target,1534			       devinfo.lun, AC_TRANSFER_NEG);1535	}1536}1537 1538static int1539ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,1540		      struct scsi_cmnd *cmd)1541{1542	struct	 scb *scb;1543	struct	 hardware_scb *hscb;1544	struct	 ahd_initiator_tinfo *tinfo;1545	struct	 ahd_tmode_tstate *tstate;1546	u_int	 col_idx;1547	uint16_t mask;1548	unsigned long flags;1549	int nseg;1550 1551	nseg = scsi_dma_map(cmd);1552	if (nseg < 0)1553		return SCSI_MLQUEUE_HOST_BUSY;1554 1555	ahd_lock(ahd, &flags);1556 1557	/*1558	 * Get an scb to use.1559	 */1560	tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,1561				    cmd->device->id, &tstate);1562	if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 01563	 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {1564		col_idx = AHD_NEVER_COL_IDX;1565	} else {1566		col_idx = AHD_BUILD_COL_IDX(cmd->device->id,1567					    cmd->device->lun);1568	}1569	if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {1570		ahd->flags |= AHD_RESOURCE_SHORTAGE;1571		ahd_unlock(ahd, &flags);1572		scsi_dma_unmap(cmd);1573		return SCSI_MLQUEUE_HOST_BUSY;1574	}1575 1576	scb->io_ctx = cmd;1577	scb->platform_data->dev = dev;1578	hscb = scb->hscb;1579	cmd->host_scribble = (char *)scb;1580 1581	/*1582	 * Fill out basics of the HSCB.1583	 */1584	hscb->control = 0;1585	hscb->scsiid = ahd_build_scsiid(ahd, cmd->device);1586	hscb->lun = cmd->device->lun;1587	scb->hscb->task_management = 0;1588	mask = SCB_GET_TARGET_MASK(ahd, scb);1589 1590	if ((ahd->user_discenable & mask) != 0)1591		hscb->control |= DISCENB;1592 1593	if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)1594		scb->flags |= SCB_PACKETIZED;1595 1596	if ((tstate->auto_negotiate & mask) != 0) {1597		scb->flags |= SCB_AUTO_NEGOTIATE;1598		scb->hscb->control |= MK_MESSAGE;1599	}1600 1601	if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {1602		if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH1603		 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {1604			hscb->control |= ORDERED_QUEUE_TAG;1605			dev->commands_since_idle_or_otag = 0;1606		} else {1607			hscb->control |= SIMPLE_QUEUE_TAG;1608		}1609	}1610 1611	hscb->cdb_len = cmd->cmd_len;1612	memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);1613 1614	scb->platform_data->xfer_len = 0;1615	ahd_set_residual(scb, 0);1616	ahd_set_sense_residual(scb, 0);1617	scb->sg_count = 0;1618 1619	if (nseg > 0) {1620		void *sg = scb->sg_list;1621		struct scatterlist *cur_seg;1622		int i;1623 1624		scb->platform_data->xfer_len = 0;1625 1626		scsi_for_each_sg(cmd, cur_seg, nseg, i) {1627			dma_addr_t addr;1628			bus_size_t len;1629 1630			addr = sg_dma_address(cur_seg);1631			len = sg_dma_len(cur_seg);1632			scb->platform_data->xfer_len += len;1633			sg = ahd_sg_setup(ahd, scb, sg, addr, len,1634					  i == (nseg - 1));1635		}1636	}1637 1638	LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);1639	dev->openings--;1640	dev->active++;1641	dev->commands_issued++;1642 1643	if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)1644		dev->commands_since_idle_or_otag++;1645	scb->flags |= SCB_ACTIVE;1646	ahd_queue_scb(ahd, scb);1647 1648	ahd_unlock(ahd, &flags);1649 1650	return 0;1651}1652 1653/*1654 * SCSI controller interrupt handler.1655 */1656irqreturn_t1657ahd_linux_isr(int irq, void *dev_id)1658{1659	struct	ahd_softc *ahd;1660	u_long	flags;1661	int	ours;1662 1663	ahd = (struct ahd_softc *) dev_id;1664	ahd_lock(ahd, &flags); 1665	ours = ahd_intr(ahd);1666	ahd_unlock(ahd, &flags);1667	return IRQ_RETVAL(ours);1668}1669 1670void1671ahd_send_async(struct ahd_softc *ahd, char channel,1672	       u_int target, u_int lun, ac_code code)1673{1674	switch (code) {1675	case AC_TRANSFER_NEG:1676	{1677		struct  scsi_target *starget;1678		struct	ahd_initiator_tinfo *tinfo;1679		struct	ahd_tmode_tstate *tstate;1680		unsigned int target_ppr_options;1681 1682		BUG_ON(target == CAM_TARGET_WILDCARD);1683 1684		tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,1685					    target, &tstate);1686 1687		/*1688		 * Don't bother reporting results while1689		 * negotiations are still pending.1690		 */1691		if (tinfo->curr.period != tinfo->goal.period1692		 || tinfo->curr.width != tinfo->goal.width1693		 || tinfo->curr.offset != tinfo->goal.offset1694		 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)1695			if (bootverbose == 0)1696				break;1697 1698		/*1699		 * Don't bother reporting results that1700		 * are identical to those last reported.1701		 */1702		starget = ahd->platform_data->starget[target];1703		if (starget == NULL)1704			break;1705 1706		target_ppr_options =1707			(spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)1708			+ (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)1709			+ (spi_iu(starget) ?  MSG_EXT_PPR_IU_REQ : 0)1710			+ (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)1711			+ (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)1712			+ (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)1713			+ (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)1714			+ (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);1715 1716		if (tinfo->curr.period == spi_period(starget)1717		    && tinfo->curr.width == spi_width(starget)1718		    && tinfo->curr.offset == spi_offset(starget)1719		 && tinfo->curr.ppr_options == target_ppr_options)1720			if (bootverbose == 0)1721				break;1722 1723		spi_period(starget) = tinfo->curr.period;1724		spi_width(starget) = tinfo->curr.width;1725		spi_offset(starget) = tinfo->curr.offset;1726		spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;1727		spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;1728		spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;1729		spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;1730		spi_pcomp_en(starget) =  tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;1731		spi_rti(starget) =  tinfo->curr.ppr_options &  MSG_EXT_PPR_RTI ? 1 : 0;1732		spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;1733		spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;1734		spi_display_xfer_agreement(starget);1735		break;1736	}1737        case AC_SENT_BDR:1738	{1739		WARN_ON(lun != CAM_LUN_WILDCARD);1740		scsi_report_device_reset(ahd->platform_data->host,1741					 channel - 'A', target);1742		break;1743	}1744        case AC_BUS_RESET:1745		if (ahd->platform_data->host != NULL) {1746			scsi_report_bus_reset(ahd->platform_data->host,1747					      channel - 'A');1748		}1749                break;1750        default:1751                panic("ahd_send_async: Unexpected async event");1752        }1753}1754 1755/*1756 * Calls the higher level scsi done function and frees the scb.1757 */1758void1759ahd_done(struct ahd_softc *ahd, struct scb *scb)1760{1761	struct scsi_cmnd *cmd;1762	struct	  ahd_linux_device *dev;1763 1764	if ((scb->flags & SCB_ACTIVE) == 0) {1765		printk("SCB %d done'd twice\n", SCB_GET_TAG(scb));1766		ahd_dump_card_state(ahd);1767		panic("Stopping for safety");1768	}1769	LIST_REMOVE(scb, pending_links);1770	cmd = scb->io_ctx;1771	dev = scb->platform_data->dev;1772	dev->active--;1773	dev->openings++;1774	if (cmd) {1775		if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {1776			cmd->result &= ~(CAM_DEV_QFRZN << 16);1777			dev->qfrozen--;1778		}1779	} else if (scb->flags & SCB_DEVICE_RESET) {1780		if (ahd->platform_data->eh_done)1781			complete(ahd->platform_data->eh_done);1782		ahd_free_scb(ahd, scb);1783		return;1784	}1785	ahd_linux_unmap_scb(ahd, scb);1786 1787	/*1788	 * Guard against stale sense data.1789	 * The Linux mid-layer assumes that sense1790	 * was retrieved anytime the first byte of1791	 * the sense buffer looks "sane".1792	 */1793	cmd->sense_buffer[0] = 0;1794	if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {1795#ifdef AHD_REPORT_UNDERFLOWS1796		uint32_t amount_xferred;1797 1798		amount_xferred =1799		    ahd_get_transfer_length(scb) - ahd_get_residual(scb);1800#endif1801		if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {1802#ifdef AHD_DEBUG1803			if ((ahd_debug & AHD_SHOW_MISC) != 0) {1804				ahd_print_path(ahd, scb);1805				printk("Set CAM_UNCOR_PARITY\n");1806			}1807#endif1808			ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);1809#ifdef AHD_REPORT_UNDERFLOWS1810		/*1811		 * This code is disabled by default as some1812		 * clients of the SCSI system do not properly1813		 * initialize the underflow parameter.  This1814		 * results in spurious termination of commands1815		 * that complete as expected (e.g. underflow is1816		 * allowed as command can return variable amounts1817		 * of data.1818		 */1819		} else if (amount_xferred < scb->io_ctx->underflow) {1820			u_int i;1821 1822			ahd_print_path(ahd, scb);1823			printk("CDB:");1824			for (i = 0; i < scb->io_ctx->cmd_len; i++)1825				printk(" 0x%x", scb->io_ctx->cmnd[i]);1826			printk("\n");1827			ahd_print_path(ahd, scb);1828			printk("Saw underflow (%ld of %ld bytes). "1829			       "Treated as error\n",1830				ahd_get_residual(scb),1831				ahd_get_transfer_length(scb));1832			ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);1833#endif1834		} else {1835			ahd_set_transaction_status(scb, CAM_REQ_CMP);1836		}1837	} else if (cmd &&1838		   ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {1839		ahd_linux_handle_scsi_status(ahd, cmd->device, scb);1840	}1841 1842	if (dev->openings == 11843	 && ahd_get_transaction_status(scb) == CAM_REQ_CMP1844	 && ahd_get_scsi_status(scb) != SAM_STAT_TASK_SET_FULL)1845		dev->tag_success_count++;1846	/*1847	 * Some devices deal with temporary internal resource1848	 * shortages by returning queue full.  When the queue1849	 * full occurrs, we throttle back.  Slowly try to get1850	 * back to our previous queue depth.1851	 */1852	if ((dev->openings + dev->active) < dev->maxtags1853	 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {1854		dev->tag_success_count = 0;1855		dev->openings++;1856	}1857 1858	if (dev->active == 0)1859		dev->commands_since_idle_or_otag = 0;1860 1861	if ((scb->flags & SCB_RECOVERY_SCB) != 0) {1862		printk("Recovery SCB completes\n");1863		if (ahd_get_transaction_status(scb) == CAM_BDR_SENT1864		 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)1865			ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);1866 1867		if (ahd->platform_data->eh_done)1868			complete(ahd->platform_data->eh_done);1869	}1870 1871	ahd_free_scb(ahd, scb);1872	if (cmd)1873		ahd_linux_queue_cmd_complete(ahd, cmd);1874}1875 1876static void1877ahd_linux_handle_scsi_status(struct ahd_softc *ahd,1878			     struct scsi_device *sdev, struct scb *scb)1879{1880	struct	ahd_devinfo devinfo;1881	struct ahd_linux_device *dev = scsi_transport_device_data(sdev);1882 1883	ahd_compile_devinfo(&devinfo,1884			    ahd->our_id,1885			    sdev->sdev_target->id, sdev->lun,1886			    sdev->sdev_target->channel == 0 ? 'A' : 'B',1887			    ROLE_INITIATOR);1888	1889	/*1890	 * We don't currently trust the mid-layer to1891	 * properly deal with queue full or busy.  So,1892	 * when one occurs, we tell the mid-layer to1893	 * unconditionally requeue the command to us1894	 * so that we can retry it ourselves.  We also1895	 * implement our own throttling mechanism so1896	 * we don't clobber the device with too many1897	 * commands.1898	 */1899	switch (ahd_get_scsi_status(scb)) {1900	default:1901		break;1902	case SAM_STAT_CHECK_CONDITION:1903	case SAM_STAT_COMMAND_TERMINATED:1904	{1905		struct scsi_cmnd *cmd;1906 1907		/*1908		 * Copy sense information to the OS's cmd1909		 * structure if it is available.1910		 */1911		cmd = scb->io_ctx;1912		if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {1913			struct scsi_status_iu_header *siu;1914			u_int sense_size;1915			u_int sense_offset;1916 1917			if (scb->flags & SCB_SENSE) {1918				sense_size = min(sizeof(struct scsi_sense_data)1919					       - ahd_get_sense_residual(scb),1920						 (u_long)SCSI_SENSE_BUFFERSIZE);1921				sense_offset = 0;1922			} else {1923				/*1924				 * Copy only the sense data into the provided1925				 * buffer.1926				 */1927				siu = (struct scsi_status_iu_header *)1928				    scb->sense_data;1929				sense_size = min_t(size_t,1930						scsi_4btoul(siu->sense_length),1931						SCSI_SENSE_BUFFERSIZE);1932				sense_offset = SIU_SENSE_OFFSET(siu);1933			}1934 1935			memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);1936			memcpy(cmd->sense_buffer,1937			       ahd_get_sense_buf(ahd, scb)1938			       + sense_offset, sense_size);1939			set_status_byte(cmd, SAM_STAT_CHECK_CONDITION);1940 1941#ifdef AHD_DEBUG1942			if (ahd_debug & AHD_SHOW_SENSE) {1943				int i;1944 1945				printk("Copied %d bytes of sense data at %d:",1946				       sense_size, sense_offset);1947				for (i = 0; i < sense_size; i++) {1948					if ((i & 0xF) == 0)1949						printk("\n");1950					printk("0x%x ", cmd->sense_buffer[i]);1951				}1952				printk("\n");1953			}1954#endif1955		}1956		break;1957	}1958	case SAM_STAT_TASK_SET_FULL:1959		/*1960		 * By the time the core driver has returned this1961		 * command, all other commands that were queued1962		 * to us but not the device have been returned.1963		 * This ensures that dev->active is equal to1964		 * the number of commands actually queued to1965		 * the device.1966		 */1967		dev->tag_success_count = 0;1968		if (dev->active != 0) {1969			/*1970			 * Drop our opening count to the number1971			 * of commands currently outstanding.1972			 */1973			dev->openings = 0;1974#ifdef AHD_DEBUG1975			if ((ahd_debug & AHD_SHOW_QFULL) != 0) {1976				ahd_print_path(ahd, scb);1977				printk("Dropping tag count to %d\n",1978				       dev->active);1979			}1980#endif1981			if (dev->active == dev->tags_on_last_queuefull) {1982 1983				dev->last_queuefull_same_count++;1984				/*1985				 * If we repeatedly see a queue full1986				 * at the same queue depth, this1987				 * device has a fixed number of tag1988				 * slots.  Lock in this tag depth1989				 * so we stop seeing queue fulls from1990				 * this device.1991				 */1992				if (dev->last_queuefull_same_count1993				 == AHD_LOCK_TAGS_COUNT) {1994					dev->maxtags = dev->active;1995					ahd_print_path(ahd, scb);1996					printk("Locking max tag count at %d\n",1997					       dev->active);1998				}1999			} else {2000				dev->tags_on_last_queuefull = dev->active;2001				dev->last_queuefull_same_count = 0;2002			}2003			ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);2004			ahd_set_scsi_status(scb, SAM_STAT_GOOD);2005			ahd_platform_set_tags(ahd, sdev, &devinfo,2006				     (dev->flags & AHD_DEV_Q_BASIC)2007				   ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);2008			break;2009		}2010		/*2011		 * Drop down to a single opening, and treat this2012		 * as if the target returned BUSY SCSI status.2013		 */2014		dev->openings = 1;2015		ahd_platform_set_tags(ahd, sdev, &devinfo,2016			     (dev->flags & AHD_DEV_Q_BASIC)2017			   ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);2018		ahd_set_scsi_status(scb, SAM_STAT_BUSY);2019	}2020}2021 2022static void2023ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)2024{2025	int status;2026	int new_status = DID_OK;2027	int do_fallback = 0;2028	int scsi_status;2029	struct scsi_sense_data *sense;2030 2031	/*2032	 * Map CAM error codes into Linux Error codes.  We2033	 * avoid the conversion so that the DV code has the2034	 * full error information available when making2035	 * state change decisions.2036	 */2037 2038	status = ahd_cmd_get_transaction_status(cmd);2039	switch (status) {2040	case CAM_REQ_INPROG:2041	case CAM_REQ_CMP:2042		new_status = DID_OK;2043		break;2044	case CAM_AUTOSENSE_FAIL:2045		new_status = DID_ERROR;2046		fallthrough;2047	case CAM_SCSI_STATUS_ERROR:2048		scsi_status = ahd_cmd_get_scsi_status(cmd);2049 2050		switch(scsi_status) {2051		case SAM_STAT_COMMAND_TERMINATED:2052		case SAM_STAT_CHECK_CONDITION:2053			sense = (struct scsi_sense_data *)2054				cmd->sense_buffer;2055			if (sense->extra_len >= 5 &&2056			    (sense->add_sense_code == 0x472057			     || sense->add_sense_code == 0x48))2058				do_fallback = 1;2059			break;2060		default:2061			break;2062		}2063		break;2064	case CAM_REQ_ABORTED:2065		new_status = DID_ABORT;2066		break;2067	case CAM_BUSY:2068		new_status = DID_BUS_BUSY;2069		break;2070	case CAM_REQ_INVALID:2071	case CAM_PATH_INVALID:2072		new_status = DID_BAD_TARGET;2073		break;2074	case CAM_SEL_TIMEOUT:2075		new_status = DID_NO_CONNECT;2076		break;2077	case CAM_SCSI_BUS_RESET:2078	case CAM_BDR_SENT:2079		new_status = DID_RESET;2080		break;2081	case CAM_UNCOR_PARITY:2082		new_status = DID_PARITY;2083		do_fallback = 1;2084		break;2085	case CAM_CMD_TIMEOUT:2086		new_status = DID_TIME_OUT;2087		do_fallback = 1;2088		break;2089	case CAM_REQ_CMP_ERR:2090	case CAM_UNEXP_BUSFREE:2091	case CAM_DATA_RUN_ERR:2092		new_status = DID_ERROR;2093		do_fallback = 1;2094		break;2095	case CAM_UA_ABORT:2096	case CAM_NO_HBA:2097	case CAM_SEQUENCE_FAIL:2098	case CAM_CCB_LEN_ERR:2099	case CAM_PROVIDE_FAIL:2100	case CAM_REQ_TERMIO:2101	case CAM_UNREC_HBA_ERROR:2102	case CAM_REQ_TOO_BIG:2103		new_status = DID_ERROR;2104		break;2105	case CAM_REQUEUE_REQ:2106		new_status = DID_REQUEUE;2107		break;2108	default:2109		/* We should never get here */2110		new_status = DID_ERROR;2111		break;2112	}2113 2114	if (do_fallback) {2115		printk("%s: device overrun (status %x) on %d:%d:%d\n",2116		       ahd_name(ahd), status, cmd->device->channel,2117		       cmd->device->id, (u8)cmd->device->lun);2118	}2119 2120	ahd_cmd_set_transaction_status(cmd, new_status);2121 2122	scsi_done(cmd);2123}2124 2125static void2126ahd_freeze_simq(struct ahd_softc *ahd)2127{2128	scsi_block_requests(ahd->platform_data->host);2129}2130 2131static void2132ahd_release_simq(struct ahd_softc *ahd)2133{2134	scsi_unblock_requests(ahd->platform_data->host);2135}2136 2137static int2138ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)2139{2140	struct ahd_softc *ahd;2141	struct ahd_linux_device *dev;2142	struct scb *pending_scb;2143	u_int  saved_scbptr;2144	u_int  active_scbptr;2145	u_int  last_phase;2146	u_int  cdb_byte;2147	int    retval = SUCCESS;2148	int    was_paused;2149	int    paused;2150	int    wait;2151	int    disconnected;2152	ahd_mode_state saved_modes;2153	unsigned long flags;2154 2155	pending_scb = NULL;2156	paused = FALSE;2157	wait = FALSE;2158	ahd = *(struct ahd_softc **)cmd->device->host->hostdata;2159 2160	scmd_printk(KERN_INFO, cmd,2161		    "Attempting to queue an ABORT message:");2162 2163	printk("CDB:");2164	for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)2165		printk(" 0x%x", cmd->cmnd[cdb_byte]);2166	printk("\n");2167 2168	ahd_lock(ahd, &flags);2169 2170	/*2171	 * First determine if we currently own this command.2172	 * Start by searching the device queue.  If not found2173	 * there, check the pending_scb list.  If not found2174	 * at all, and the system wanted us to just abort the2175	 * command, return success.2176	 */2177	dev = scsi_transport_device_data(cmd->device);2178 2179	if (dev == NULL) {2180		/*2181		 * No target device for this command exists,2182		 * so we must not still own the command.2183		 */2184		scmd_printk(KERN_INFO, cmd, "Is not an active device\n");2185		goto done;2186	}2187 2188	/*2189	 * See if we can find a matching cmd in the pending list.2190	 */2191	LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {2192		if (pending_scb->io_ctx == cmd)2193			break;2194	}2195 2196	if (pending_scb == NULL) {2197		scmd_printk(KERN_INFO, cmd, "Command not found\n");2198		goto done;2199	}2200 2201	if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {2202		/*2203		 * We can't queue two recovery actions using the same SCB2204		 */2205		retval = FAILED;2206		goto done;2207	}2208 2209	/*2210	 * Ensure that the card doesn't do anything2211	 * behind our back.  Also make sure that we2212	 * didn't "just" miss an interrupt that would2213	 * affect this cmd.2214	 */2215	was_paused = ahd_is_paused(ahd);2216	ahd_pause_and_flushwork(ahd);2217	paused = TRUE;2218 2219	if ((pending_scb->flags & SCB_ACTIVE) == 0) {2220		scmd_printk(KERN_INFO, cmd, "Command already completed\n");2221		goto done;2222	}2223 2224	printk("%s: At time of recovery, card was %spaused\n",2225	       ahd_name(ahd), was_paused ? "" : "not ");2226	ahd_dump_card_state(ahd);2227 2228	disconnected = TRUE;2229	if (ahd_search_qinfifo(ahd, cmd->device->id, 2230			       cmd->device->channel + 'A',2231			       cmd->device->lun,2232			       pending_scb->hscb->tag,2233			       ROLE_INITIATOR, CAM_REQ_ABORTED,2234			       SEARCH_COMPLETE) > 0) {2235		printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",2236		       ahd_name(ahd), cmd->device->channel, 2237		       cmd->device->id, (u8)cmd->device->lun);2238		goto done;2239	}2240 2241	saved_modes = ahd_save_modes(ahd);2242	ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);2243	last_phase = ahd_inb(ahd, LASTPHASE);2244	saved_scbptr = ahd_get_scbptr(ahd);2245	active_scbptr = saved_scbptr;2246	if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {2247		struct scb *bus_scb;2248 2249		bus_scb = ahd_lookup_scb(ahd, active_scbptr);2250		if (bus_scb == pending_scb)2251			disconnected = FALSE;2252	}2253 2254	/*2255	 * At this point, pending_scb is the scb associated with the2256	 * passed in command.  That command is currently active on the2257	 * bus or is in the disconnected state.2258	 */2259	ahd_inb(ahd, SAVED_SCSIID);2260	if (last_phase != P_BUSFREE2261	    && SCB_GET_TAG(pending_scb) == active_scbptr) {2262 2263		/*2264		 * We're active on the bus, so assert ATN2265		 * and hope that the target responds.2266		 */2267		pending_scb = ahd_lookup_scb(ahd, active_scbptr);2268		pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;2269		ahd_outb(ahd, MSG_OUT, HOST_MSG);2270		ahd_outb(ahd, SCSISIGO, last_phase|ATNO);2271		scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");2272		wait = TRUE;2273	} else if (disconnected) {2274 2275		/*2276		 * Actually re-queue this SCB in an attempt2277		 * to select the device before it reconnects.2278		 */2279		pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;2280		ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));2281		pending_scb->hscb->cdb_len = 0;2282		pending_scb->hscb->task_attribute = 0;2283		pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;2284 2285		if ((pending_scb->flags & SCB_PACKETIZED) != 0) {2286			/*2287			 * Mark the SCB has having an outstanding2288			 * task management function.  Should the command2289			 * complete normally before the task management2290			 * function can be sent, the host will be notified2291			 * to abort our requeued SCB.2292			 */2293			ahd_outb(ahd, SCB_TASK_MANAGEMENT,2294				 pending_scb->hscb->task_management);2295		} else {2296			/*2297			 * If non-packetized, set the MK_MESSAGE control2298			 * bit indicating that we desire to send a message.2299			 * We also set the disconnected flag since there is2300			 * no guarantee that our SCB control byte matches2301			 * the version on the card.  We don't want the2302			 * sequencer to abort the command thinking an2303			 * unsolicited reselection occurred.2304			 */2305			pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;2306 2307			/*2308			 * The sequencer will never re-reference the2309			 * in-core SCB.  To make sure we are notified2310			 * during reselection, set the MK_MESSAGE flag in2311			 * the card's copy of the SCB.2312			 */2313			ahd_outb(ahd, SCB_CONTROL,2314				 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);2315		}2316 2317		/*2318		 * Clear out any entries in the QINFIFO first2319		 * so we are the next SCB for this target2320		 * to run.2321		 */2322		ahd_search_qinfifo(ahd, cmd->device->id,2323				   cmd->device->channel + 'A', cmd->device->lun,2324				   SCB_LIST_NULL, ROLE_INITIATOR,2325				   CAM_REQUEUE_REQ, SEARCH_COMPLETE);2326		ahd_qinfifo_requeue_tail(ahd, pending_scb);2327		ahd_set_scbptr(ahd, saved_scbptr);2328		ahd_print_path(ahd, pending_scb);2329		printk("Device is disconnected, re-queuing SCB\n");2330		wait = TRUE;2331	} else {2332		scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");2333		retval = FAILED;2334	}2335 2336 2337	ahd_restore_modes(ahd, saved_modes);2338done:2339	if (paused)2340		ahd_unpause(ahd);2341	if (wait) {2342		DECLARE_COMPLETION_ONSTACK(done);2343 2344		ahd->platform_data->eh_done = &done;2345		ahd_unlock(ahd, &flags);2346 2347		printk("%s: Recovery code sleeping\n", ahd_name(ahd));2348		if (!wait_for_completion_timeout(&done, 5 * HZ)) {2349			ahd_lock(ahd, &flags);2350			ahd->platform_data->eh_done = NULL;2351			ahd_unlock(ahd, &flags);2352			printk("%s: Timer Expired (active %d)\n",2353			       ahd_name(ahd), dev->active);2354			retval = FAILED;2355		}2356		printk("Recovery code awake\n");2357	} else2358		ahd_unlock(ahd, &flags);2359 2360	if (retval != SUCCESS)2361		printk("%s: Command abort returning 0x%x\n",2362		       ahd_name(ahd), retval);2363 2364	return retval;2365}2366 2367static void ahd_linux_set_width(struct scsi_target *starget, int width)2368{2369	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);2370	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);2371	struct ahd_devinfo devinfo;2372	unsigned long flags;2373 2374	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,2375			    starget->channel + 'A', ROLE_INITIATOR);2376	ahd_lock(ahd, &flags);2377	ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);2378	ahd_unlock(ahd, &flags);2379}2380 2381static void ahd_linux_set_period(struct scsi_target *starget, int period)2382{2383	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);2384	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);2385	struct ahd_tmode_tstate *tstate;2386	struct ahd_initiator_tinfo *tinfo 2387		= ahd_fetch_transinfo(ahd,2388				      starget->channel + 'A',2389				      shost->this_id, starget->id, &tstate);2390	struct ahd_devinfo devinfo;2391	unsigned int ppr_options = tinfo->goal.ppr_options;2392	unsigned int dt;2393	unsigned long flags;2394	unsigned long offset = tinfo->goal.offset;2395 2396#ifdef AHD_DEBUG2397	if ((ahd_debug & AHD_SHOW_DV) != 0)2398		printk("%s: set period to %d\n", ahd_name(ahd), period);2399#endif2400	if (offset == 0)2401		offset = MAX_OFFSET;2402 2403	if (period < 8)2404		period = 8;2405	if (period < 10) {2406		if (spi_max_width(starget)) {2407			ppr_options |= MSG_EXT_PPR_DT_REQ;2408			if (period == 8)2409				ppr_options |= MSG_EXT_PPR_IU_REQ;2410		} else2411			period = 10;2412	}2413 2414	dt = ppr_options & MSG_EXT_PPR_DT_REQ;2415 2416	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,2417			    starget->channel + 'A', ROLE_INITIATOR);2418 2419	/* all PPR requests apart from QAS require wide transfers */2420	if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {2421		if (spi_width(starget) == 0)2422			ppr_options &= MSG_EXT_PPR_QAS_REQ;2423	}2424 2425	ahd_find_syncrate(ahd, &period, &ppr_options,2426			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);2427 2428	ahd_lock(ahd, &flags);2429	ahd_set_syncrate(ahd, &devinfo, period, offset,2430			 ppr_options, AHD_TRANS_GOAL, FALSE);2431	ahd_unlock(ahd, &flags);2432}2433 2434static void ahd_linux_set_offset(struct scsi_target *starget, int offset)2435{2436	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);2437	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);2438	struct ahd_tmode_tstate *tstate;2439	struct ahd_initiator_tinfo *tinfo 2440		= ahd_fetch_transinfo(ahd,2441				      starget->channel + 'A',2442				      shost->this_id, starget->id, &tstate);2443	struct ahd_devinfo devinfo;2444	unsigned int ppr_options = 0;2445	unsigned int period = 0;2446	unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;2447	unsigned long flags;2448 2449#ifdef AHD_DEBUG2450	if ((ahd_debug & AHD_SHOW_DV) != 0)2451		printk("%s: set offset to %d\n", ahd_name(ahd), offset);2452#endif2453 2454	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,2455			    starget->channel + 'A', ROLE_INITIATOR);2456	if (offset != 0) {2457		period = tinfo->goal.period;2458		ppr_options = tinfo->goal.ppr_options;2459		ahd_find_syncrate(ahd, &period, &ppr_options, 2460				  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);2461	}2462 2463	ahd_lock(ahd, &flags);2464	ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,2465			 AHD_TRANS_GOAL, FALSE);2466	ahd_unlock(ahd, &flags);2467}2468 2469static void ahd_linux_set_dt(struct scsi_target *starget, int dt)2470{2471	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);2472	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);2473	struct ahd_tmode_tstate *tstate;2474	struct ahd_initiator_tinfo *tinfo 2475		= ahd_fetch_transinfo(ahd,2476				      starget->channel + 'A',2477				      shost->this_id, starget->id, &tstate);2478	struct ahd_devinfo devinfo;2479	unsigned int ppr_options = tinfo->goal.ppr_options2480		& ~MSG_EXT_PPR_DT_REQ;2481	unsigned int period = tinfo->goal.period;2482	unsigned int width = tinfo->goal.width;2483	unsigned long flags;2484 2485#ifdef AHD_DEBUG2486	if ((ahd_debug & AHD_SHOW_DV) != 0)2487		printk("%s: %s DT\n", ahd_name(ahd),2488		       dt ? "enabling" : "disabling");2489#endif2490	if (dt && spi_max_width(starget)) {2491		ppr_options |= MSG_EXT_PPR_DT_REQ;2492		if (!width)2493			ahd_linux_set_width(starget, 1);2494	} else {2495		if (period <= 9)2496			period = 10; /* If resetting DT, period must be >= 25ns */2497		/* IU is invalid without DT set */2498		ppr_options &= ~MSG_EXT_PPR_IU_REQ;2499	}2500	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,2501			    starget->channel + 'A', ROLE_INITIATOR);2502	ahd_find_syncrate(ahd, &period, &ppr_options,2503			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);2504 2505	ahd_lock(ahd, &flags);2506	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,2507			 ppr_options, AHD_TRANS_GOAL, FALSE);2508	ahd_unlock(ahd, &flags);2509}2510 2511static void ahd_linux_set_qas(struct scsi_target *starget, int qas)2512{2513	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);2514	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);2515	struct ahd_tmode_tstate *tstate;2516	struct ahd_initiator_tinfo *tinfo 2517		= ahd_fetch_transinfo(ahd,2518				      starget->channel + 'A',2519				      shost->this_id, starget->id, &tstate);2520	struct ahd_devinfo devinfo;2521	unsigned int ppr_options = tinfo->goal.ppr_options2522		& ~MSG_EXT_PPR_QAS_REQ;2523	unsigned int period = tinfo->goal.period;2524	unsigned int dt;2525	unsigned long flags;2526 2527#ifdef AHD_DEBUG2528	if ((ahd_debug & AHD_SHOW_DV) != 0)2529		printk("%s: %s QAS\n", ahd_name(ahd),2530		       qas ? "enabling" : "disabling");2531#endif2532 2533	if (qas) {2534		ppr_options |= MSG_EXT_PPR_QAS_REQ; 2535	}2536 2537	dt = ppr_options & MSG_EXT_PPR_DT_REQ;2538 2539	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,2540			    starget->channel + 'A', ROLE_INITIATOR);2541	ahd_find_syncrate(ahd, &period, &ppr_options,2542			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);2543 2544	ahd_lock(ahd, &flags);2545	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,2546			 ppr_options, AHD_TRANS_GOAL, FALSE);2547	ahd_unlock(ahd, &flags);2548}2549 2550static void ahd_linux_set_iu(struct scsi_target *starget, int iu)2551{2552	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);2553	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);2554	struct ahd_tmode_tstate *tstate;2555	struct ahd_initiator_tinfo *tinfo 2556		= ahd_fetch_transinfo(ahd,2557				      starget->channel + 'A',2558				      shost->this_id, starget->id, &tstate);2559	struct ahd_devinfo devinfo;2560	unsigned int ppr_options = tinfo->goal.ppr_options2561		& ~MSG_EXT_PPR_IU_REQ;2562	unsigned int period = tinfo->goal.period;2563	unsigned int dt;2564	unsigned long flags;2565 2566#ifdef AHD_DEBUG2567	if ((ahd_debug & AHD_SHOW_DV) != 0)2568		printk("%s: %s IU\n", ahd_name(ahd),2569		       iu ? "enabling" : "disabling");2570#endif2571 2572	if (iu && spi_max_width(starget)) {2573		ppr_options |= MSG_EXT_PPR_IU_REQ;2574		ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */2575	}2576 2577	dt = ppr_options & MSG_EXT_PPR_DT_REQ;2578 2579	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,2580			    starget->channel + 'A', ROLE_INITIATOR);2581	ahd_find_syncrate(ahd, &period, &ppr_options,2582			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);2583 2584	ahd_lock(ahd, &flags);2585	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,2586			 ppr_options, AHD_TRANS_GOAL, FALSE);2587	ahd_unlock(ahd, &flags);2588}2589 2590static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)2591{2592	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);2593	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);2594	struct ahd_tmode_tstate *tstate;2595	struct ahd_initiator_tinfo *tinfo 2596		= ahd_fetch_transinfo(ahd,2597				      starget->channel + 'A',2598				      shost->this_id, starget->id, &tstate);2599	struct ahd_devinfo devinfo;2600	unsigned int ppr_options = tinfo->goal.ppr_options2601		& ~MSG_EXT_PPR_RD_STRM;2602	unsigned int period = tinfo->goal.period;2603	unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;2604	unsigned long flags;2605 2606#ifdef AHD_DEBUG2607	if ((ahd_debug & AHD_SHOW_DV) != 0)2608		printk("%s: %s Read Streaming\n", ahd_name(ahd),2609		       rdstrm  ? "enabling" : "disabling");2610#endif2611 2612	if (rdstrm && spi_max_width(starget))2613		ppr_options |= MSG_EXT_PPR_RD_STRM;2614 2615	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,2616			    starget->channel + 'A', ROLE_INITIATOR);2617	ahd_find_syncrate(ahd, &period, &ppr_options,2618			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);2619 2620	ahd_lock(ahd, &flags);2621	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,2622			 ppr_options, AHD_TRANS_GOAL, FALSE);2623	ahd_unlock(ahd, &flags);2624}2625 2626static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)2627{2628	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);2629	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);2630	struct ahd_tmode_tstate *tstate;2631	struct ahd_initiator_tinfo *tinfo 2632		= ahd_fetch_transinfo(ahd,2633				      starget->channel + 'A',2634				      shost->this_id, starget->id, &tstate);2635	struct ahd_devinfo devinfo;2636	unsigned int ppr_options = tinfo->goal.ppr_options2637		& ~MSG_EXT_PPR_WR_FLOW;2638	unsigned int period = tinfo->goal.period;2639	unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;2640	unsigned long flags;2641 2642#ifdef AHD_DEBUG2643	if ((ahd_debug & AHD_SHOW_DV) != 0)2644		printk("%s: %s Write Flow Control\n", ahd_name(ahd),2645		       wrflow ? "enabling" : "disabling");2646#endif2647 2648	if (wrflow && spi_max_width(starget))2649		ppr_options |= MSG_EXT_PPR_WR_FLOW;2650 2651	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,2652			    starget->channel + 'A', ROLE_INITIATOR);2653	ahd_find_syncrate(ahd, &period, &ppr_options,2654			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);2655 2656	ahd_lock(ahd, &flags);2657	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,2658			 ppr_options, AHD_TRANS_GOAL, FALSE);2659	ahd_unlock(ahd, &flags);2660}2661 2662static void ahd_linux_set_rti(struct scsi_target *starget, int rti)2663{2664	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);2665	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);2666	struct ahd_tmode_tstate *tstate;2667	struct ahd_initiator_tinfo *tinfo 2668		= ahd_fetch_transinfo(ahd,2669				      starget->channel + 'A',2670				      shost->this_id, starget->id, &tstate);2671	struct ahd_devinfo devinfo;2672	unsigned int ppr_options = tinfo->goal.ppr_options2673		& ~MSG_EXT_PPR_RTI;2674	unsigned int period = tinfo->goal.period;2675	unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;2676	unsigned long flags;2677 2678	if ((ahd->features & AHD_RTI) == 0) {2679#ifdef AHD_DEBUG2680		if ((ahd_debug & AHD_SHOW_DV) != 0)2681			printk("%s: RTI not available\n", ahd_name(ahd));2682#endif2683		return;2684	}2685 2686#ifdef AHD_DEBUG2687	if ((ahd_debug & AHD_SHOW_DV) != 0)2688		printk("%s: %s RTI\n", ahd_name(ahd),2689		       rti ? "enabling" : "disabling");2690#endif2691 2692	if (rti && spi_max_width(starget))2693		ppr_options |= MSG_EXT_PPR_RTI;2694 2695	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,2696			    starget->channel + 'A', ROLE_INITIATOR);2697	ahd_find_syncrate(ahd, &period, &ppr_options,2698			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);2699 2700	ahd_lock(ahd, &flags);2701	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,2702			 ppr_options, AHD_TRANS_GOAL, FALSE);2703	ahd_unlock(ahd, &flags);2704}2705 2706static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)2707{2708	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);2709	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);2710	struct ahd_tmode_tstate *tstate;2711	struct ahd_initiator_tinfo *tinfo 2712		= ahd_fetch_transinfo(ahd,2713				      starget->channel + 'A',2714				      shost->this_id, starget->id, &tstate);2715	struct ahd_devinfo devinfo;2716	unsigned int ppr_options = tinfo->goal.ppr_options2717		& ~MSG_EXT_PPR_PCOMP_EN;2718	unsigned int period = tinfo->goal.period;2719	unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;2720	unsigned long flags;2721 2722#ifdef AHD_DEBUG2723	if ((ahd_debug & AHD_SHOW_DV) != 0)2724		printk("%s: %s Precompensation\n", ahd_name(ahd),2725		       pcomp ? "Enable" : "Disable");2726#endif2727 2728	if (pcomp && spi_max_width(starget)) {2729		uint8_t precomp;2730 2731		if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {2732			const struct ahd_linux_iocell_opts *iocell_opts;2733 2734			iocell_opts = &aic79xx_iocell_info[ahd->unit];2735			precomp = iocell_opts->precomp;2736		} else {2737			precomp = AIC79XX_DEFAULT_PRECOMP;2738		}2739		ppr_options |= MSG_EXT_PPR_PCOMP_EN;2740		AHD_SET_PRECOMP(ahd, precomp);2741	} else {2742		AHD_SET_PRECOMP(ahd, 0);2743	}2744 2745	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,2746			    starget->channel + 'A', ROLE_INITIATOR);2747	ahd_find_syncrate(ahd, &period, &ppr_options,2748			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);2749 2750	ahd_lock(ahd, &flags);2751	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,2752			 ppr_options, AHD_TRANS_GOAL, FALSE);2753	ahd_unlock(ahd, &flags);2754}2755 2756static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)2757{2758	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);2759	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);2760	struct ahd_tmode_tstate *tstate;2761	struct ahd_initiator_tinfo *tinfo 2762		= ahd_fetch_transinfo(ahd,2763				      starget->channel + 'A',2764				      shost->this_id, starget->id, &tstate);2765	struct ahd_devinfo devinfo;2766	unsigned int ppr_options = tinfo->goal.ppr_options2767		& ~MSG_EXT_PPR_HOLD_MCS;2768	unsigned int period = tinfo->goal.period;2769	unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;2770	unsigned long flags;2771 2772	if (hold && spi_max_width(starget))2773		ppr_options |= MSG_EXT_PPR_HOLD_MCS;2774 2775	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,2776			    starget->channel + 'A', ROLE_INITIATOR);2777	ahd_find_syncrate(ahd, &period, &ppr_options,2778			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);2779 2780	ahd_lock(ahd, &flags);2781	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,2782			 ppr_options, AHD_TRANS_GOAL, FALSE);2783	ahd_unlock(ahd, &flags);2784}2785 2786static void ahd_linux_get_signalling(struct Scsi_Host *shost)2787{2788	struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;2789	unsigned long flags;2790	u8 mode;2791 2792	ahd_lock(ahd, &flags);2793	ahd_pause(ahd);2794	mode = ahd_inb(ahd, SBLKCTL);2795	ahd_unpause(ahd);2796	ahd_unlock(ahd, &flags);2797 2798	if (mode & ENAB40)2799		spi_signalling(shost) = SPI_SIGNAL_LVD;2800	else if (mode & ENAB20)2801		spi_signalling(shost) = SPI_SIGNAL_SE;2802	else2803		spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;2804}2805 2806static struct spi_function_template ahd_linux_transport_functions = {2807	.set_offset	= ahd_linux_set_offset,2808	.show_offset	= 1,2809	.set_period	= ahd_linux_set_period,2810	.show_period	= 1,2811	.set_width	= ahd_linux_set_width,2812	.show_width	= 1,2813	.set_dt		= ahd_linux_set_dt,2814	.show_dt	= 1,2815	.set_iu		= ahd_linux_set_iu,2816	.show_iu	= 1,2817	.set_qas	= ahd_linux_set_qas,2818	.show_qas	= 1,2819	.set_rd_strm	= ahd_linux_set_rd_strm,2820	.show_rd_strm	= 1,2821	.set_wr_flow	= ahd_linux_set_wr_flow,2822	.show_wr_flow	= 1,2823	.set_rti	= ahd_linux_set_rti,2824	.show_rti	= 1,2825	.set_pcomp_en	= ahd_linux_set_pcomp_en,2826	.show_pcomp_en	= 1,2827	.set_hold_mcs	= ahd_linux_set_hold_mcs,2828	.show_hold_mcs	= 1,2829	.get_signalling = ahd_linux_get_signalling,2830};2831 2832static int __init2833ahd_linux_init(void)2834{2835	int	error = 0;2836 2837	/*2838	 * If we've been passed any parameters, process them now.2839	 */2840	if (aic79xx)2841		aic79xx_setup(aic79xx);2842 2843	ahd_linux_transport_template =2844		spi_attach_transport(&ahd_linux_transport_functions);2845	if (!ahd_linux_transport_template)2846		return -ENODEV;2847 2848	scsi_transport_reserve_device(ahd_linux_transport_template,2849				      sizeof(struct ahd_linux_device));2850 2851	error = ahd_linux_pci_init();2852	if (error)2853		spi_release_transport(ahd_linux_transport_template);2854	return error;2855}2856 2857static void __exit2858ahd_linux_exit(void)2859{2860	ahd_linux_pci_exit();2861	spi_release_transport(ahd_linux_transport_template);2862}2863 2864module_init(ahd_linux_init);2865module_exit(ahd_linux_exit);2866