| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Justin T. Gibbs | 3977 | 40.06% | 23 | 15.65% |
| James Bottomley | 3405 | 34.30% | 24 | 16.33% |
| Linus Torvalds | 1489 | 15.00% | 9 | 6.12% |
| Hannes Reinecke | 251 | 2.53% | 9 | 6.12% |
| Denys Vlasenko | 227 | 2.29% | 3 | 2.04% |
| Christoph Hellwig | 216 | 2.18% | 17 | 11.56% |
| Linus Torvalds (pre-git) | 130 | 1.31% | 23 | 15.65% |
| Jeff Garzik | 53 | 0.53% | 6 | 4.08% |
| Pekka J Enberg | 40 | 0.40% | 1 | 0.68% |
| FUJITA Tomonori | 39 | 0.39% | 3 | 2.04% |
| Jesper Juhl | 25 | 0.25% | 1 | 0.68% |
| Doug Ledford | 12 | 0.12% | 1 | 0.68% |
| Al Viro | 9 | 0.09% | 2 | 1.36% |
| Andrew Morton | 8 | 0.08% | 3 | 2.04% |
| Lucas De Marchi | 6 | 0.06% | 2 | 1.36% |
| Tobias Klauser | 6 | 0.06% | 1 | 0.68% |
| Matt Domsch | 5 | 0.05% | 1 | 0.68% |
| Lee Jones | 5 | 0.05% | 1 | 0.68% |
| Dave Jones | 4 | 0.04% | 2 | 1.36% |
| Amol Lad | 4 | 0.04% | 1 | 0.68% |
| David Milburn | 2 | 0.02% | 1 | 0.68% |
| Adrian Bunk | 2 | 0.02% | 2 | 1.36% |
| Tong Zhang | 2 | 0.02% | 1 | 0.68% |
| David S. Miller | 2 | 0.02% | 1 | 0.68% |
| Joe Perches | 1 | 0.01% | 1 | 0.68% |
| Uwe Kleine-König | 1 | 0.01% | 1 | 0.68% |
| Michael Hayes | 1 | 0.01% | 1 | 0.68% |
| Colin Ian King | 1 | 0.01% | 1 | 0.68% |
| Peter Zijlstra | 1 | 0.01% | 1 | 0.68% |
| Alan One Thousand Gnomes | 1 | 0.01% | 1 | 0.68% |
| Randy Dunlap | 1 | 0.01% | 1 | 0.68% |
| Michael Opdenacker | 1 | 0.01% | 1 | 0.68% |
| Su Hui | 1 | 0.01% | 1 | 0.68% |
| Total | 9928 | 147 |
/* * Adaptec AIC7xxx device driver for Linux. * * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $ * * Copyright (c) 1994 John Aycock * The University of Calgary Department of Computer Science. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; see the file COPYING. If not, write to * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. * * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide, * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux, * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual, * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the * ANSI SCSI-2 specification (draft 10c), ... * * -------------------------------------------------------------------------- * * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org): * * Substantially modified to include support for wide and twin bus * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes, * SCB paging, and other rework of the code. * * -------------------------------------------------------------------------- * Copyright (c) 1994-2000 Justin T. Gibbs. * Copyright (c) 2000-2001 Adaptec Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * substantially similar to the "NO WARRANTY" disclaimer below * ("Disclaimer") and any redistribution must be conditioned upon * including a substantially similar Disclaimer requirement for further * binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names * of any contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * NO WARRANTY * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGES. * *--------------------------------------------------------------------------- * * Thanks also go to (in alphabetical order) the following: * * Rory Bolt - Sequencer bug fixes * Jay Estabrook - Initial DEC Alpha support * Doug Ledford - Much needed abort/reset bug fixes * Kai Makisara - DMAing of SCBs * * A Boot time option was also added for not resetting the scsi bus. * * Form: aic7xxx=extended * aic7xxx=no_reset * aic7xxx=verbose * * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97 * * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp */ /* * Further driver modifications made by Doug Ledford <dledford@redhat.com> * * Copyright (c) 1997-1999 Doug Ledford * * These changes are released under the same licensing terms as the FreeBSD * driver written by Justin Gibbs. Please see his Copyright notice above * for the exact terms and conditions covering my changes as well as the * warranty statement. * * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include * but are not limited to: * * 1: Import of the latest FreeBSD sequencer code for this driver * 2: Modification of kernel code to accommodate different sequencer semantics * 3: Extensive changes throughout kernel portion of driver to improve * abort/reset processing and error hanndling * 4: Other work contributed by various people on the Internet * 5: Changes to printk information and verbosity selection code * 6: General reliability related changes, especially in IRQ management * 7: Modifications to the default probe/attach order for supported cards * 8: SMP friendliness has been improved * */ #include "aic7xxx_osm.h" #include "aic7xxx_inline.h" #include <scsi/scsicam.h> static struct scsi_transport_template *ahc_linux_transport_template = NULL; #include <linux/init.h> /* __setup */ #include <linux/mm.h> /* For fetching system memory size */ #include <linux/blkdev.h> /* For block_size() */ #include <linux/delay.h> /* For ssleep/msleep */ #include <linux/slab.h> /* * Set this to the delay in seconds after SCSI bus reset. * Note, we honor this only for the initial bus reset. * The scsi error recovery code performs its own bus settle * delay handling for error recovery actions. */ #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS #else #define AIC7XXX_RESET_DELAY 5000 #endif /* * To change the default number of tagged transactions allowed per-device, * add a line to the lilo.conf file like: * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" * which will result in the first four devices on the first two * controllers being set to a tagged queue depth of 32. * * The tag_commands is an array of 16 to allow for wide and twin adapters. * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 * for channel 1. */ typedef struct { uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */ } adapter_tag_info_t; /* * Modify this as you see fit for your system. * * 0 tagged queuing disabled * 1 <= n <= 253 n == max tags ever dispatched. * * The driver will throttle the number of commands dispatched to a * device if it returns queue full. For devices with a fixed maximum * queue depth, the driver will eventually determine this depth and * lock it in (a console message is printed to indicate that a lock * has occurred). On some devices, queue full is returned for a temporary * resource shortage. These devices will return queue full at varying * depths. The driver will throttle back when the queue fulls occur and * attempt to slowly increase the depth over time as the device recovers * from the resource shortage. * * In this example, the first line will disable tagged queueing for all * the devices on the first probed aic7xxx adapter. * * The second line enables tagged queueing with 4 commands/LUN for IDs * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the * driver to attempt to use up to 64 tags for ID 1. * * The third line is the same as the first line. * * The fourth line disables tagged queueing for devices 0 and 3. It * enables tagged queueing for the other IDs, with 16 commands/LUN * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for * IDs 2, 5-7, and 9-15. */ /* * NOTE: The below structure is for reference only, the actual structure * to modify in order to change things is just below this comment block. adapter_tag_info_t aic7xxx_tag_info[] = { {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} }; */ #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE #else #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE #endif #define AIC7XXX_CONFIGED_TAG_COMMANDS { \ AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \ } /* * By default, use the number of commands specified by * the users kernel configuration. */ static adapter_tag_info_t aic7xxx_tag_info[] = { {AIC7XXX_CONFIGED_TAG_COMMANDS}, {AIC7XXX_CONFIGED_TAG_COMMANDS}, {AIC7XXX_CONFIGED_TAG_COMMANDS}, {AIC7XXX_CONFIGED_TAG_COMMANDS}, {AIC7XXX_CONFIGED_TAG_COMMANDS}, {AIC7XXX_CONFIGED_TAG_COMMANDS}, {AIC7XXX_CONFIGED_TAG_COMMANDS}, {AIC7XXX_CONFIGED_TAG_COMMANDS}, {AIC7XXX_CONFIGED_TAG_COMMANDS}, {AIC7XXX_CONFIGED_TAG_COMMANDS}, {AIC7XXX_CONFIGED_TAG_COMMANDS}, {AIC7XXX_CONFIGED_TAG_COMMANDS}, {AIC7XXX_CONFIGED_TAG_COMMANDS}, {AIC7XXX_CONFIGED_TAG_COMMANDS}, {AIC7XXX_CONFIGED_TAG_COMMANDS}, {AIC7XXX_CONFIGED_TAG_COMMANDS} }; /* * There should be a specific return value for this in scsi.h, but * it seems that most drivers ignore it. */ #define DID_UNDERFLOW DID_ERROR void ahc_print_path(struct ahc_softc *ahc, struct scb *scb) { printk("(scsi%d:%c:%d:%d): ", ahc->platform_data->host->host_no, scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X', scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1, scb != NULL ? SCB_GET_LUN(scb) : -1); } /* * XXX - these options apply unilaterally to _all_ 274x/284x/294x * cards in the system. This should be fixed. Exceptions to this * rule are noted in the comments. */ /* * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This * has no effect on any later resets that might occur due to things like * SCSI bus timeouts. */ static uint32_t aic7xxx_no_reset; /* * Should we force EXTENDED translation on a controller. * 0 == Use whatever is in the SEEPROM or default to off * 1 == Use whatever is in the SEEPROM or default to on */ static uint32_t aic7xxx_extended; /* * PCI bus parity checking of the Adaptec controllers. This is somewhat * dubious at best. To my knowledge, this option has never actually * solved a PCI parity problem, but on certain machines with broken PCI * chipset configurations where stray PCI transactions with bad parity are * the norm rather than the exception, the error messages can be overwhelming. * It's included in the driver for completeness. * 0 = Shut off PCI parity check * non-0 = reverse polarity pci parity checking */ static uint32_t aic7xxx_pci_parity = ~0; /* * There are lots of broken chipsets in the world. Some of them will * violate the PCI spec when we issue byte sized memory writes to our * controller. I/O mapped register access, if allowed by the given * platform, will work in almost all cases. */ uint32_t aic7xxx_allow_memio = ~0; /* * So that we can set how long each device is given as a selection timeout. * The table of values goes like this: * 0 - 256ms * 1 - 128ms * 2 - 64ms * 3 - 32ms * We default to 256ms because some older devices need a longer time * to respond to initial selection. */ static uint32_t aic7xxx_seltime; /* * Certain devices do not perform any aging on commands. Should the * device be saturated by commands in one portion of the disk, it is * possible for transactions on far away sectors to never be serviced. * To handle these devices, we can periodically send an ordered tag to * force all outstanding transactions to be serviced prior to a new * transaction. */ static uint32_t aic7xxx_periodic_otag; /* * Module information and settable options. */ static char *aic7xxx = NULL; MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver"); MODULE_LICENSE("Dual BSD/GPL"); MODULE_VERSION(AIC7XXX_DRIVER_VERSION); module_param(aic7xxx, charp, 0444); MODULE_PARM_DESC(aic7xxx, "period-delimited options string:\n" " verbose Enable verbose/diagnostic logging\n" " allow_memio Allow device registers to be memory mapped\n" " debug Bitmask of debug values to enable\n" " no_probe Toggle EISA/VLB controller probing\n" " probe_eisa_vl Toggle EISA/VLB controller probing\n" " no_reset Suppress initial bus resets\n" " extended Enable extended geometry on all controllers\n" " periodic_otag Send an ordered tagged transaction\n" " periodically to prevent tag starvation.\n" " This may be required by some older disk\n" " drives or RAID arrays.\n" " tag_info:<tag_str> Set per-target tag depth\n" " global_tag_depth:<int> Global tag depth for every target\n" " on every bus\n" " seltime:<int> Selection Timeout\n" " (0/256ms,1/128ms,2/64ms,3/32ms)\n" "\n" " Sample modprobe configuration file:\n" " # Toggle EISA/VLB probing\n" " # Set tag depth on Controller 1/Target 1 to 10 tags\n" " # Shorten the selection timeout to 128ms\n" "\n" " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n" ); static void ahc_linux_handle_scsi_status(struct ahc_softc *, struct scsi_device *, struct scb *); static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd); static void ahc_linux_freeze_simq(struct ahc_softc *ahc); static void ahc_linux_release_simq(struct ahc_softc *ahc); static int ahc_linux_queue_recovery_cmd(struct scsi_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) { /* * udelay on Linux can have problems for * multi-millisecond waits. Wait at most * 1024us per call. */ while (usec > 0) { udelay(usec % 1024); usec -= 1024; } } /***************************** Low Level I/O **********************************/ uint8_t ahc_inb(struct ahc_softc * ahc, long port) { uint8_t x; if (ahc->tag == BUS_SPACE_MEMIO) { x = readb(ahc->bsh.maddr + port); } else { x = inb(ahc->bsh.ioport + port); } mb(); return (x); } void ahc_outb(struct ahc_softc * ahc, long port, uint8_t val) { if (ahc->tag == BUS_SPACE_MEMIO) { writeb(val, ahc->bsh.maddr + port); } else { outb(val, ahc->bsh.ioport + port); } mb(); } void ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count) { int i; /* * There is probably a more efficient way to do this on Linux * but we don't use this for anything speed critical and this * should work. */ for (i = 0; i < count; i++) ahc_outb(ahc, port, *array++); } void ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count) { int i; /* * There is probably a more efficient way to do this on Linux * but we don't use this for anything speed critical and this * should work. */ for (i = 0; i < count; i++) *array++ = ahc_inb(ahc, port); } /********************************* Inlines ************************************/ static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*); static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len); static void ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb) { struct scsi_cmnd *cmd; cmd = scb->io_ctx; ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE); scsi_dma_unmap(cmd); } static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len) { int consumed; if ((scb->sg_count + 1) > AHC_NSEG) panic("Too few segs for dma mapping. " "Increase AHC_NSEG\n"); consumed = 1; sg->addr = ahc_htole32(addr & 0xFFFFFFFF); scb->platform_data->xfer_len += len; if (sizeof(dma_addr_t) > 4 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK; sg->len = ahc_htole32(len); return (consumed); } /* * Return a string describing the driver. */ static const char * ahc_linux_info(struct Scsi_Host *host) { static char buffer[512]; char ahc_info[256]; char *bp; struct ahc_softc *ahc; bp = &buffer[0]; ahc = *(struct ahc_softc **)host->hostdata; memset(bp, 0, sizeof(buffer)); strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION "\n" " <"); strcat(bp, ahc->description); strcat(bp, ">\n" " "); ahc_controller_info(ahc, ahc_info); strcat(bp, ahc_info); strcat(bp, "\n"); return (bp); } /* * Queue an SCB to the controller. */ static int ahc_linux_queue_lck(struct scsi_cmnd *cmd) { struct ahc_softc *ahc; struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device); int rtn = SCSI_MLQUEUE_HOST_BUSY; unsigned long flags; ahc = *(struct ahc_softc **)cmd->device->host->hostdata; ahc_lock(ahc, &flags); if (ahc->platform_data->qfrozen == 0) { cmd->result = CAM_REQ_INPROG << 16; rtn = ahc_linux_run_command(ahc, dev, cmd); } ahc_unlock(ahc, &flags); return rtn; } static DEF_SCSI_QCMD(ahc_linux_queue) static inline struct scsi_target ** ahc_linux_target_in_softc(struct scsi_target *starget) { struct ahc_softc *ahc = *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); unsigned int target_offset; target_offset = starget->id; if (starget->channel != 0) target_offset += 8; return &ahc->platform_data->starget[target_offset]; } static int ahc_linux_target_alloc(struct scsi_target *starget) { struct ahc_softc *ahc = *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); struct seeprom_config *sc = ahc->seep_config; unsigned long flags; struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); unsigned short scsirate; struct ahc_devinfo devinfo; char channel = starget->channel + 'A'; unsigned int our_id = ahc->our_id; unsigned int target_offset; target_offset = starget->id; if (starget->channel != 0) target_offset += 8; if (starget->channel) our_id = ahc->our_id_b; ahc_lock(ahc, &flags); BUG_ON(*ahc_targp != NULL); *ahc_targp = starget; if (sc) { int maxsync = AHC_SYNCRATE_DT; int ultra = 0; int flags = sc->device_flags[target_offset]; if (ahc->flags & AHC_NEWEEPROM_FMT) { if (flags & CFSYNCHISULTRA) ultra = 1; } else if (flags & CFULTRAEN) ultra = 1; /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04 * change it to ultra=0, CFXFER = 0 */ if(ultra && (flags & CFXFER) == 0x04) { ultra = 0; flags &= ~CFXFER; } if ((ahc->features & AHC_ULTRA2) != 0) { scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0); } else { scsirate = (flags & CFXFER) << 4; maxsync = ultra ? AHC_SYNCRATE_ULTRA : AHC_SYNCRATE_FAST; } spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; if (!(flags & CFSYNCH)) spi_max_offset(starget) = 0; spi_min_period(starget) = ahc_find_period(ahc, scsirate, maxsync); } ahc_compile_devinfo(&devinfo, our_id, starget->id, CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, AHC_TRANS_GOAL, /*paused*/FALSE); ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, AHC_TRANS_GOAL, /*paused*/FALSE); ahc_unlock(ahc, &flags); return 0; } static void ahc_linux_target_destroy(struct scsi_target *starget) { struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); *ahc_targp = NULL; } static int ahc_linux_slave_alloc(struct scsi_device *sdev) { struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata); struct scsi_target *starget = sdev->sdev_target; struct ahc_linux_device *dev; if (bootverbose) printk("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id); dev = scsi_transport_device_data(sdev); memset(dev, 0, sizeof(*dev)); /* * We start out life using untagged * transactions of which we allow one. */ dev->openings = 1; /* * Set maxtags to 0. This will be changed if we * later determine that we are dealing with * a tagged queuing capable device. */ dev->maxtags = 0; spi_period(starget) = 0; return 0; } static int ahc_linux_slave_configure(struct scsi_device *sdev) { if (bootverbose) sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); ahc_linux_device_queue_depth(sdev); /* Initial Domain Validation */ if (!spi_initial_dv(sdev->sdev_target)) spi_dv_device(sdev); return 0; } #if defined(__i386__) /* * Return the disk geometry for the given SCSI device. */ static int ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[]) { 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) { int error; error = ahc_linux_queue_recovery_cmd(cmd->device, cmd); if (error != SUCCESS) printk("aic7xxx_abort returns 0x%x\n", error); return (error); } /* * Attempt to send a target reset message to the device that timed out. */ static int ahc_linux_dev_reset(struct scsi_cmnd *cmd) { int error; error = ahc_linux_queue_recovery_cmd(cmd->device, NULL); if (error != SUCCESS) printk("aic7xxx_dev_reset returns 0x%x\n", error); return (error); } /* * Reset the SCSI bus. */ static int ahc_linux_bus_reset(struct scsi_cmnd *cmd) { struct ahc_softc *ahc; int found; unsigned long flags; ahc = *(struct ahc_softc **)cmd->device->host->hostdata; ahc_lock(ahc, &flags); found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A', /*initiate reset*/TRUE); ahc_unlock(ahc, &flags); if (bootverbose) printk("%s: SCSI bus reset delivered. " "%d SCBs aborted.\n", ahc_name(ahc), found); return SUCCESS; } struct scsi_host_template aic7xxx_driver_template = { .module = THIS_MODULE, .name = "aic7xxx", .proc_name = "aic7xxx", .show_info = ahc_linux_show_info, .write_info = ahc_proc_write_seeprom, .info = ahc_linux_info, .queuecommand = ahc_linux_queue, .eh_abort_handler = ahc_linux_abort, .eh_device_reset_handler = ahc_linux_dev_reset, .eh_bus_reset_handler = ahc_linux_bus_reset, #if defined(__i386__) .bios_param = ahc_linux_biosparam, #endif .can_queue = AHC_MAX_QUEUE, .this_id = -1, .max_sectors = 8192, .cmd_per_lun = 2, .slave_alloc = ahc_linux_slave_alloc, .slave_configure = ahc_linux_slave_configure, .target_alloc = ahc_linux_target_alloc, .target_destroy = ahc_linux_target_destroy, }; /**************************** Tasklet Handler *********************************/ static inline unsigned int ahc_build_scsiid(struct ahc_softc *ahc, struct scsi_device *sdev) { unsigned int scsiid = (sdev->id << TID_SHIFT) & TID; if (sdev->channel == 0) scsiid |= ahc->our_id; else scsiid |= ahc->our_id_b | TWIN_CHNLB; return scsiid; } /******************************** Bus DMA *************************************/ int ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, bus_size_t alignment, bus_size_t boundary, dma_addr_t lowaddr, dma_addr_t highaddr, bus_dma_filter_t *filter, void *filterarg, bus_size_t maxsize, int nsegments, bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) { bus_dma_tag_t dmat; dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); if (dmat == NULL) return (ENOMEM); /* * Linux is very simplistic about DMA memory. For now don't * maintain all specification information. Once Linux supplies * better facilities for doing these operations, or the * needs of this particular driver change, we might need to do * more here. */ dmat->alignment = alignment; dmat->boundary = boundary; dmat->maxsize = maxsize; *ret_tag = dmat; return (0); } void ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) { kfree(dmat); } int ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, int flags, bus_dmamap_t *mapp) { /* XXX: check if we really need the GFP_ATOMIC and unwind this mess! */ *vaddr = dma_alloc_coherent(ahc->dev, dmat->maxsize, mapp, GFP_ATOMIC); if (*vaddr == NULL) return ENOMEM; return 0; } void ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, void* vaddr, bus_dmamap_t map) { dma_free_coherent(ahc->dev, dmat->maxsize, vaddr, map); } int ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, void *cb_arg, int flags) { /* * Assume for now that this will only be used during * initialization and not for per-transaction buffer mapping. */ bus_dma_segment_t stack_sg; stack_sg.ds_addr = map; stack_sg.ds_len = dmat->maxsize; cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); return (0); } void ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) { } int ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) { /* Nothing to do */ return (0); } static void ahc_linux_setup_tag_info_global(char *p) { int tags, i, j; tags = simple_strtoul(p + 1, NULL, 0) & 0xff; printk("Setting Global Tags= %d\n", tags); for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) { for (j = 0; j < AHC_NUM_TARGETS; j++) { aic7xxx_tag_info[i].tag_commands[j] = tags; } } } static void ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) { if ((instance >= 0) && (targ >= 0) && (instance < ARRAY_SIZE(aic7xxx_tag_info)) && (targ < AHC_NUM_TARGETS)) { aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; if (bootverbose) printk("tag_info[%d:%d] = %d\n", instance, targ, value); } } static char * ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, void (*callback)(u_long, int, int, int32_t), u_long callback_arg) { char *tok_end; char *tok_end2; int i; int instance; int targ; int done; char tok_list[] = {'.', ',', '{', '}', '\0'}; /* All options use a ':' name/arg separator */ if (*opt_arg != ':') return (opt_arg); opt_arg++; instance = -1; targ = -1; done = FALSE; /* * Restore separator that may be in * the middle of our option argument. */ tok_end = strchr(opt_arg, '\0'); if (tok_end < end) *tok_end = ','; while (!done) { switch (*opt_arg) { case '{': if (instance == -1) { instance = 0; } else { if (depth > 1) { if (targ == -1) targ = 0; } else { printk("Malformed Option %s\n", opt_name); done = TRUE; } } opt_arg++; break; case '}': if (targ != -1) targ = -1; else if (instance != -1) instance = -1; opt_arg++; break; case ',': case '.': if (instance == -1) done = TRUE; else if (targ >= 0) targ++; else if (instance >= 0) instance++; opt_arg++; break; case '\0': done = TRUE; break; default: tok_end = end; for (i = 0; tok_list[i]; i++) { tok_end2 = strchr(opt_arg, tok_list[i]); if ((tok_end2) && (tok_end2 < tok_end)) tok_end = tok_end2; } callback(callback_arg, instance, targ, simple_strtol(opt_arg, NULL, 0)); opt_arg = tok_end; break; } } return (opt_arg); } /* * Handle Linux boot parameters. This routine allows for assigning a value * to a parameter with a ':' between the parameter and the value. * ie. aic7xxx=stpwlev:1,extended */ static int aic7xxx_setup(char *s) { int i, n; char *p; char *end; static const struct { const char *name; uint32_t *flag; } options[] = { { "extended", &aic7xxx_extended }, { "no_reset", &aic7xxx_no_reset }, { "verbose", &aic7xxx_verbose }, { "allow_memio", &aic7xxx_allow_memio}, #ifdef AHC_DEBUG { "debug", &ahc_debug }, #endif { "periodic_otag", &aic7xxx_periodic_otag }, { "pci_parity", &aic7xxx_pci_parity }, { "seltime", &aic7xxx_seltime }, { "tag_info", NULL }, { "global_tag_depth", NULL }, { "dv", NULL } }; end = strchr(s, '\0'); /* * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE * will never be 0 in this case. */ n = 0; while ((p = strsep(&s, ",.")) != NULL) { if (*p == '\0') continue; for (i = 0; i < ARRAY_SIZE(options); i++) { n = strlen(options[i].name); if (strncmp(options[i].name, p, n) == 0) break; } if (i == ARRAY_SIZE(options)) continue; if (strncmp(p, "global_tag_depth", n) == 0) { ahc_linux_setup_tag_info_global(p + n); } else if (strncmp(p, "tag_info", n) == 0) { s = ahc_parse_brace_option("tag_info", p + n, end, 2, ahc_linux_setup_tag_info, 0); } else if (p[n] == ':') { *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); } else if (strncmp(p, "verbose", n) == 0) { *(options[i].flag) = 1; } else { *(options[i].flag) ^= 0xFFFFFFFF; } } return 1; } __setup("aic7xxx=", aic7xxx_setup); uint32_t aic7xxx_verbose; int ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template) { char buf[80]; struct Scsi_Host *host; char *new_name; u_long s; int retval; template->name = ahc->description; host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); if (host == NULL) return -ENOMEM; *((struct ahc_softc **)host->hostdata) = ahc; ahc->platform_data->host = host; host->can_queue = AHC_MAX_QUEUE; host->cmd_per_lun = 2; /* XXX No way to communicate the ID for multiple channels */ host->this_id = ahc->our_id; host->irq = ahc->platform_data->irq; host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; host->max_lun = AHC_NUM_LUNS; host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; host->sg_tablesize = AHC_NSEG; ahc_lock(ahc, &s); ahc_set_unit(ahc, ahc_linux_unit++); ahc_unlock(ahc, &s); sprintf(buf, "scsi%d", host->host_no); new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); if (new_name != NULL) { strcpy(new_name, buf); ahc_set_name(ahc, new_name); } host->unique_id = ahc->unit; ahc_linux_initialize_scsi_bus(ahc); ahc_intr_enable(ahc, TRUE); host->transportt = ahc_linux_transport_template; retval = scsi_add_host(host, ahc->dev); if (retval) { printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n"); scsi_host_put(host); return retval; } scsi_scan_host(host); return 0; } /* * Place the SCSI bus into a known state by either resetting it, * or forcing transfer negotiations on the next command to any * target. */ static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) { int i; int numtarg; unsigned long s; i = 0; numtarg = 0; ahc_lock(ahc, &s); if (aic7xxx_no_reset != 0) ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); if ((ahc->flags & AHC_RESET_BUS_A) != 0) ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); else numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; if ((ahc->features & AHC_TWIN) != 0) { if ((ahc->flags & AHC_RESET_BUS_B) != 0) { ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); } else { if (numtarg == 0) i = 8; numtarg += 8; } } /* * Force negotiation to async for all targets that * will not see an initial bus reset. */ for (; i < numtarg; i++) { struct ahc_devinfo devinfo; struct ahc_initiator_tinfo *tinfo; struct ahc_tmode_tstate *tstate; u_int our_id; u_int target_id; char channel; channel = 'A'; our_id = ahc->our_id; target_id = i; if (i > 7 && (ahc->features & AHC_TWIN) != 0) { channel = 'B'; our_id = ahc->our_id_b; target_id = i % 8; } tinfo = ahc_fetch_transinfo(ahc, channel, our_id, target_id, &tstate); ahc_compile_devinfo(&devinfo, our_id, target_id, CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); ahc_update_neg_request(ahc, &devinfo, tstate, tinfo, AHC_NEG_ALWAYS); } ahc_unlock(ahc, &s); /* Give the bus some time to recover */ if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { ahc_linux_freeze_simq(ahc); msleep(AIC7XXX_RESET_DELAY); ahc_linux_release_simq(ahc); } } int ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) { ahc->platform_data = kzalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC); if (ahc->platform_data == NULL) return (ENOMEM); ahc->platform_data->irq = AHC_LINUX_NOIRQ; ahc_lockinit(ahc); ahc->seltime = (aic7xxx_seltime & 0x3) << 4; ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; if (aic7xxx_pci_parity == 0) ahc->flags |= AHC_DISABLE_PCI_PERR; return (0); } void ahc_platform_free(struct ahc_softc *ahc) { struct scsi_target *starget; int i; if (ahc->platform_data != NULL) { /* destroy all of the device and target objects */ for (i = 0; i < AHC_NUM_TARGETS; i++) { starget = ahc->platform_data->starget[i]; if (starget != NULL) { ahc->platform_data->starget[i] = NULL; } } if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) free_irq(ahc->platform_data->irq, ahc); if (ahc->tag == BUS_SPACE_PIO && ahc->bsh.ioport != 0) release_region(ahc->bsh.ioport, 256); if (ahc->tag == BUS_SPACE_MEMIO && ahc->bsh.maddr != NULL) { iounmap(ahc->bsh.maddr); release_mem_region(ahc->platform_data->mem_busaddr, 0x1000); } if (ahc->platform_data->host) scsi_host_put(ahc->platform_data->host); kfree(ahc->platform_data); } } void ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) { ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), SCB_GET_CHANNEL(ahc, scb), SCB_GET_LUN(scb), SCB_LIST_NULL, ROLE_UNKNOWN, CAM_REQUEUE_REQ); } void ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev, struct ahc_devinfo *devinfo, ahc_queue_alg alg) { struct ahc_linux_device *dev; int was_queuing; int now_queuing; if (sdev == NULL) return; dev = scsi_transport_device_data(sdev); was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); switch (alg) { default: case AHC_QUEUE_NONE: now_queuing = 0; break; case AHC_QUEUE_BASIC: now_queuing = AHC_DEV_Q_BASIC; break; case AHC_QUEUE_TAGGED: now_queuing = AHC_DEV_Q_TAGGED; break; } if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 && (was_queuing != now_queuing) && (dev->active != 0)) { dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; dev->qfrozen++; } dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); if (now_queuing) { u_int usertags; usertags = ahc_linux_user_tagdepth(ahc, devinfo); if (!was_queuing) { /* * Start out aggressively and allow our * dynamic queue depth algorithm to take * care of the rest. */ dev->maxtags = usertags; dev->openings = dev->maxtags - dev->active; } if (dev->maxtags == 0) { /* * Queueing is disabled by the user. */ dev->openings = 1; } else if (alg == AHC_QUEUE_TAGGED) { dev->flags |= AHC_DEV_Q_TAGGED; if (aic7xxx_periodic_otag != 0) dev->flags |= AHC_DEV_PERIODIC_OTAG; } else dev->flags |= AHC_DEV_Q_BASIC; } else { /* We can only have one opening. */ dev->maxtags = 0; dev->openings = 1 - dev->active; } switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { case AHC_DEV_Q_BASIC: case AHC_DEV_Q_TAGGED: scsi_change_queue_depth(sdev, dev->openings + dev->active); break; default: /* * We allow the OS to queue 2 untagged transactions to * us at any time even though we can only execute them * serially on the controller/device. This should * remove some latency. */ scsi_change_queue_depth(sdev, 2); break; } } int ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, int lun, u_int tag, role_t role, uint32_t status) { return 0; } static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) { static int warned_user; u_int tags; tags = 0; if ((ahc->user_discenable & devinfo->target_mask) != 0) { if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) { if (warned_user == 0) { printk(KERN_WARNING "aic7xxx: WARNING: Insufficient tag_info instances\n" "aic7xxx: for installed controllers. Using defaults\n" "aic7xxx: Please update the aic7xxx_tag_info array in\n" "aic7xxx: the aic7xxx_osm..c source file.\n"); warned_user++; } tags = AHC_MAX_QUEUE; } else { adapter_tag_info_t *tag_info; tag_info = &aic7xxx_tag_info[ahc->unit]; tags = tag_info->tag_commands[devinfo->target_offset]; if (tags > AHC_MAX_QUEUE) tags = AHC_MAX_QUEUE; } } return (tags); } /* * Determines the queue depth for a given device. */ static void ahc_linux_device_queue_depth(struct scsi_device *sdev) { struct ahc_devinfo devinfo; u_int tags; struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata); ahc_compile_devinfo(&devinfo, sdev->sdev_target->channel == 0 ? ahc->our_id : ahc->our_id_b, sdev->sdev_target->id, sdev->lun, sdev->sdev_target->channel == 0 ? 'A' : 'B', ROLE_INITIATOR); tags = ahc_linux_user_tagdepth(ahc, &devinfo); if (tags != 0 && sdev->tagged_supported != 0) { ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED); ahc_send_async(ahc, devinfo.channel, devinfo.target, devinfo.lun, AC_TRANSFER_NEG); ahc_print_devinfo(ahc, &devinfo); printk("Tagged Queuing enabled. Depth %d\n", tags); } else { ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE); ahc_send_async(ahc, devinfo.channel, devinfo.target, devinfo.lun, AC_TRANSFER_NEG); } } static int ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, struct scsi_cmnd *cmd) { struct scb *scb; struct hardware_scb *hscb; struct ahc_initiator_tinfo *tinfo; struct ahc_tmode_tstate *tstate; uint16_t mask; struct scb_tailq *untagged_q = NULL; int nseg; /* * Schedule us to run later. The only reason we are not * running is because the whole controller Q is frozen. */ if (ahc->platform_data->qfrozen != 0) return SCSI_MLQUEUE_HOST_BUSY; /* * We only allow one untagged transaction * per target in the initiator role unless * we are storing a full busy target *lun* * table in SCB space. */ if (!(cmd->flags & SCMD_TAGGED) && (ahc->features & AHC_SCB_BTT) == 0) { int target_offset; target_offset = cmd->device->id + cmd->device->channel * 8; untagged_q = &(ahc->untagged_queues[target_offset]); if (!TAILQ_EMPTY(untagged_q)) /* if we're already executing an untagged command * we're busy to another */ return SCSI_MLQUEUE_DEVICE_BUSY; } nseg = scsi_dma_map(cmd); if (nseg < 0) return SCSI_MLQUEUE_HOST_BUSY; /* * Get an scb to use. */ scb = ahc_get_scb(ahc); if (!scb) { scsi_dma_unmap(cmd); return SCSI_MLQUEUE_HOST_BUSY; } scb->io_ctx = cmd; scb->platform_data->dev = dev; hscb = scb->hscb; cmd->host_scribble = (char *)scb; /* * Fill out basics of the HSCB. */ hscb->control = 0; hscb->scsiid = ahc_build_scsiid(ahc, cmd->device); hscb->lun = cmd->device->lun; mask = SCB_GET_TARGET_MASK(ahc, scb); tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), SCB_GET_OUR_ID(scb), SCB_GET_TARGET(ahc, scb), &tstate); hscb->scsirate = tinfo->scsirate; hscb->scsioffset = tinfo->curr.offset; if ((tstate->ultraenb & mask) != 0) hscb->control |= ULTRAENB; if ((ahc->user_discenable & mask) != 0) hscb->control |= DISCENB; if ((tstate->auto_negotiate & mask) != 0) { scb->flags |= SCB_AUTO_NEGOTIATE; scb->hscb->control |= MK_MESSAGE; } if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { hscb->control |= ORDERED_QUEUE_TAG; dev->commands_since_idle_or_otag = 0; } else { hscb->control |= SIMPLE_QUEUE_TAG; } } hscb->cdb_len = cmd->cmd_len; if (hscb->cdb_len <= 12) { memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); } else { memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); scb->flags |= SCB_CDB32_PTR; } scb->platform_data->xfer_len = 0; ahc_set_residual(scb, 0); ahc_set_sense_residual(scb, 0); scb->sg_count = 0; if (nseg > 0) { struct ahc_dma_seg *sg; struct scatterlist *cur_seg; int i; /* Copy the segments into the SG list. */ sg = scb->sg_list; /* * The sg_count may be larger than nseg if * a transfer crosses a 32bit page. */ scsi_for_each_sg(cmd, cur_seg, nseg, i) { dma_addr_t addr; bus_size_t len; int consumed; addr = sg_dma_address(cur_seg); len = sg_dma_len(cur_seg); consumed = ahc_linux_map_seg(ahc, scb, sg, addr, len); sg += consumed; scb->sg_count += consumed; } sg--; sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); /* * Reset the sg list pointer. */ scb->hscb->sgptr = ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); /* * Copy the first SG into the "current" * data pointer area. */ scb->hscb->dataptr = scb->sg_list->addr; scb->hscb->datacnt = scb->sg_list->len; } else { scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); scb->hscb->dataptr = 0; scb->hscb->datacnt = 0; scb->sg_count = 0; } LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); dev->openings--; dev->active++; dev->commands_issued++; if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) dev->commands_since_idle_or_otag++; scb->flags |= SCB_ACTIVE; if (untagged_q) { TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); scb->flags |= SCB_UNTAGGEDQ; } ahc_queue_scb(ahc, scb); return 0; } /* * SCSI controller interrupt handler. */ irqreturn_t ahc_linux_isr(int irq, void *dev_id) { struct ahc_softc *ahc; u_long flags; int ours; ahc = (struct ahc_softc *) dev_id; ahc_lock(ahc, &flags); ours = ahc_intr(ahc); ahc_unlock(ahc, &flags); return IRQ_RETVAL(ours); } void ahc_platform_flushwork(struct ahc_softc *ahc) { } void ahc_send_async(struct ahc_softc *ahc, char channel, u_int target, u_int lun, ac_code code) { switch (code) { case AC_TRANSFER_NEG: { struct scsi_target *starget; struct ahc_initiator_tinfo *tinfo; struct ahc_tmode_tstate *tstate; int target_offset; unsigned int target_ppr_options; BUG_ON(target == CAM_TARGET_WILDCARD); tinfo = ahc_fetch_transinfo(ahc, channel, channel == 'A' ? ahc->our_id : ahc->our_id_b, target, &tstate); /* * Don't bother reporting results while * negotiations are still pending. */ if (tinfo->curr.period != tinfo->goal.period || tinfo->curr.width != tinfo->goal.width || tinfo->curr.offset != tinfo->goal.offset || tinfo->curr.ppr_options != tinfo->goal.ppr_options) if (bootverbose == 0) break; /* * Don't bother reporting results that * are identical to those last reported. */ target_offset = target; if (channel == 'B') target_offset += 8; starget = ahc->platform_data->starget[target_offset]; if (starget == NULL) break; target_ppr_options = (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0); if (tinfo->curr.period == spi_period(starget) && tinfo->curr.width == spi_width(starget) && tinfo->curr.offset == spi_offset(starget) && tinfo->curr.ppr_options == target_ppr_options) if (bootverbose == 0) break; spi_period(starget) = tinfo->curr.period; spi_width(starget) = tinfo->curr.width; spi_offset(starget) = tinfo->curr.offset; spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; spi_display_xfer_agreement(starget); break; } case AC_SENT_BDR: { WARN_ON(lun != CAM_LUN_WILDCARD); scsi_report_device_reset(ahc->platform_data->host, channel - 'A', target); break; } case AC_BUS_RESET: if (ahc->platform_data->host != NULL) { scsi_report_bus_reset(ahc->platform_data->host, channel - 'A'); } break; default: panic("ahc_send_async: Unexpected async event"); } } /* * Calls the higher level scsi done function and frees the scb. */ void ahc_done(struct ahc_softc *ahc, struct scb *scb) { struct scsi_cmnd *cmd; struct ahc_linux_device *dev; LIST_REMOVE(scb, pending_links); if ((scb->flags & SCB_UNTAGGEDQ) != 0) { struct scb_tailq *untagged_q; int target_offset; target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); untagged_q = &(ahc->untagged_queues[target_offset]); TAILQ_REMOVE(untagged_q, scb, links.tqe); BUG_ON(!TAILQ_EMPTY(untagged_q)); } else if ((scb->flags & SCB_ACTIVE) == 0) { /* * Transactions aborted from the untagged queue may * not have been dispatched to the controller, so * only check the SCB_ACTIVE flag for tagged transactions. */ printk("SCB %d done'd twice\n", scb->hscb->tag); ahc_dump_card_state(ahc); panic("Stopping for safety"); } cmd = scb->io_ctx; dev = scb->platform_data->dev; dev->active--; dev->openings++; if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { cmd->result &= ~(CAM_DEV_QFRZN << 16); dev->qfrozen--; } ahc_linux_unmap_scb(ahc, scb); /* * Guard against stale sense data. * The Linux mid-layer assumes that sense * was retrieved anytime the first byte of * the sense buffer looks "sane". */ cmd->sense_buffer[0] = 0; if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { #ifdef AHC_REPORT_UNDERFLOWS uint32_t amount_xferred; amount_xferred = ahc_get_transfer_length(scb) - ahc_get_residual(scb); #endif if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { #ifdef AHC_DEBUG if ((ahc_debug & AHC_SHOW_MISC) != 0) { ahc_print_path(ahc, scb); printk("Set CAM_UNCOR_PARITY\n"); } #endif ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); #ifdef AHC_REPORT_UNDERFLOWS /* * This code is disabled by default as some * clients of the SCSI system do not properly * initialize the underflow parameter. This * results in spurious termination of commands * that complete as expected (e.g. underflow is * allowed as command can return variable amounts * of data. */ } else if (amount_xferred < scb->io_ctx->underflow) { u_int i; ahc_print_path(ahc, scb); printk("CDB:"); for (i = 0; i < scb->io_ctx->cmd_len; i++) printk(" 0x%x", scb->io_ctx->cmnd[i]); printk("\n"); ahc_print_path(ahc, scb); printk("Saw underflow (%ld of %ld bytes). " "Treated as error\n", ahc_get_residual(scb), ahc_get_transfer_length(scb)); ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); #endif } else { ahc_set_transaction_status(scb, CAM_REQ_CMP); } } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { ahc_linux_handle_scsi_status(ahc, cmd->device, scb); } if (dev->openings == 1 && ahc_get_transaction_status(scb) == CAM_REQ_CMP && ahc_get_scsi_status(scb) != SAM_STAT_TASK_SET_FULL) dev->tag_success_count++; /* * Some devices deal with temporary internal resource * shortages by returning queue full. When the queue * full occurrs, we throttle back. Slowly try to get * back to our previous queue depth. */ if ((dev->openings + dev->active) < dev->maxtags && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { dev->tag_success_count = 0; dev->openings++; } if (dev->active == 0) dev->commands_since_idle_or_otag = 0; if ((scb->flags & SCB_RECOVERY_SCB) != 0) { printk("Recovery SCB completes\n"); if (ahc_get_transaction_status(scb) == CAM_BDR_SENT || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); if (ahc->platform_data->eh_done) complete(ahc->platform_data->eh_done); } ahc_free_scb(ahc, scb); ahc_linux_queue_cmd_complete(ahc, cmd); } static void ahc_linux_handle_scsi_status(struct ahc_softc *ahc, struct scsi_device *sdev, struct scb *scb) { struct ahc_devinfo devinfo; struct ahc_linux_device *dev = scsi_transport_device_data(sdev); ahc_compile_devinfo(&devinfo, ahc->our_id, sdev->sdev_target->id, sdev->lun, sdev->sdev_target->channel == 0 ? 'A' : 'B', ROLE_INITIATOR); /* * We don't currently trust the mid-layer to * properly deal with queue full or busy. So, * when one occurs, we tell the mid-layer to * unconditionally requeue the command to us * so that we can retry it ourselves. We also * implement our own throttling mechanism so * we don't clobber the device with too many * commands. */ switch (ahc_get_scsi_status(scb)) { default: break; case SAM_STAT_CHECK_CONDITION: case SAM_STAT_COMMAND_TERMINATED: { struct scsi_cmnd *cmd; /* * Copy sense information to the OS's cmd * structure if it is available. */ cmd = scb->io_ctx; if (scb->flags & SCB_SENSE) { u_int sense_size; sense_size = min(sizeof(struct scsi_sense_data) - ahc_get_sense_residual(scb), (u_long)SCSI_SENSE_BUFFERSIZE); memcpy(cmd->sense_buffer, ahc_get_sense_buf(ahc, scb), sense_size); if (sense_size < SCSI_SENSE_BUFFERSIZE) memset(&cmd->sense_buffer[sense_size], 0, SCSI_SENSE_BUFFERSIZE - sense_size); #ifdef AHC_DEBUG if (ahc_debug & AHC_SHOW_SENSE) { int i; printk("Copied %d bytes of sense data:", sense_size); for (i = 0; i < sense_size; i++) { if ((i & 0xF) == 0) printk("\n"); printk("0x%x ", cmd->sense_buffer[i]); } printk("\n"); } #endif } break; } case SAM_STAT_TASK_SET_FULL: { /* * By the time the core driver has returned this * command, all other commands that were queued * to us but not the device have been returned. * This ensures that dev->active is equal to * the number of commands actually queued to * the device. */ dev->tag_success_count = 0; if (dev->active != 0) { /* * Drop our opening count to the number * of commands currently outstanding. */ dev->openings = 0; /* ahc_print_path(ahc, scb); printk("Dropping tag count to %d\n", dev->active); */ if (dev->active == dev->tags_on_last_queuefull) { dev->last_queuefull_same_count++; /* * If we repeatedly see a queue full * at the same queue depth, this * device has a fixed number of tag * slots. Lock in this tag depth * so we stop seeing queue fulls from * this device. */ if (dev->last_queuefull_same_count == AHC_LOCK_TAGS_COUNT) { dev->maxtags = dev->active; ahc_print_path(ahc, scb); printk("Locking max tag count at %d\n", dev->active); } } else { dev->tags_on_last_queuefull = dev->active; dev->last_queuefull_same_count = 0; } ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); ahc_set_scsi_status(scb, SAM_STAT_GOOD); ahc_platform_set_tags(ahc, sdev, &devinfo, (dev->flags & AHC_DEV_Q_BASIC) ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); break; } /* * Drop down to a single opening, and treat this * as if the target returned BUSY SCSI status. */ dev->openings = 1; ahc_set_scsi_status(scb, SAM_STAT_BUSY); ahc_platform_set_tags(ahc, sdev, &devinfo, (dev->flags & AHC_DEV_Q_BASIC) ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); break; } } } static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd) { /* * Map CAM error codes into Linux Error codes. We * avoid the conversion so that the DV code has the * full error information available when making * state change decisions. */ { u_int new_status; switch (ahc_cmd_get_transaction_status(cmd)) { case CAM_REQ_INPROG: case CAM_REQ_CMP: case CAM_SCSI_STATUS_ERROR: new_status = DID_OK; break; case CAM_REQ_ABORTED: new_status = DID_ABORT; break; case CAM_BUSY: new_status = DID_BUS_BUSY; break; case CAM_REQ_INVALID: case CAM_PATH_INVALID: new_status = DID_BAD_TARGET; break; case CAM_SEL_TIMEOUT: new_status = DID_NO_CONNECT; break; case CAM_SCSI_BUS_RESET: case CAM_BDR_SENT: new_status = DID_RESET; break; case CAM_UNCOR_PARITY: new_status = DID_PARITY; break; case CAM_CMD_TIMEOUT: new_status = DID_TIME_OUT; break; case CAM_UA_ABORT: case CAM_REQ_CMP_ERR: case CAM_AUTOSENSE_FAIL: case CAM_NO_HBA: case CAM_DATA_RUN_ERR: case CAM_UNEXP_BUSFREE: case CAM_SEQUENCE_FAIL: case CAM_CCB_LEN_ERR: case CAM_PROVIDE_FAIL: case CAM_REQ_TERMIO: case CAM_UNREC_HBA_ERROR: case CAM_REQ_TOO_BIG: new_status = DID_ERROR; break; case CAM_REQUEUE_REQ: new_status = DID_REQUEUE; break; default: /* We should never get here */ new_status = DID_ERROR; break; } ahc_cmd_set_transaction_status(cmd, new_status); } scsi_done(cmd); } static void ahc_linux_freeze_simq(struct ahc_softc *ahc) { unsigned long s; ahc_lock(ahc, &s); ahc->platform_data->qfrozen++; if (ahc->platform_data->qfrozen == 1) { scsi_block_requests(ahc->platform_data->host); /* XXX What about Twin channels? */ ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, CAM_LUN_WILDCARD, SCB_LIST_NULL, ROLE_INITIATOR, CAM_REQUEUE_REQ); } ahc_unlock(ahc, &s); } static void ahc_linux_release_simq(struct ahc_softc *ahc) { u_long s; int unblock_reqs; unblock_reqs = 0; ahc_lock(ahc, &s); if (ahc->platform_data->qfrozen > 0) ahc->platform_data->qfrozen--; if (ahc->platform_data->qfrozen == 0) unblock_reqs = 1; ahc_unlock(ahc, &s); /* * There is still a race here. The mid-layer * should keep its own freeze count and use * a bottom half handler to run the queues * so we can unblock with our own lock held. */ if (unblock_reqs) scsi_unblock_requests(ahc->platform_data->host); } static int ahc_linux_queue_recovery_cmd(struct scsi_device *sdev, struct scsi_cmnd *cmd) { struct ahc_softc *ahc; struct ahc_linux_device *dev; struct scb *pending_scb = NULL, *scb; u_int saved_scbptr; u_int active_scb_index; u_int last_phase; u_int saved_scsiid; u_int cdb_byte; int retval; int was_paused; int paused; int wait; int disconnected; unsigned long flags; paused = FALSE; wait = FALSE; ahc = *(struct ahc_softc **)sdev->host->hostdata; sdev_printk(KERN_INFO, sdev, "Attempting to queue a%s message\n", cmd ? "n ABORT" : " TARGET RESET"); if (cmd) { printk("CDB:"); for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) printk(" 0x%x", cmd->cmnd[cdb_byte]); printk("\n"); } ahc_lock(ahc, &flags); /* * First determine if we currently own this command. * Start by searching the device queue. If not found * there, check the pending_scb list. If not found * at all, and the system wanted us to just abort the * command, return success. */ dev = scsi_transport_device_data(sdev); if (dev == NULL) { /* * No target device for this command exists, * so we must not still own the command. */ printk("%s:%d:%d:%d: Is not an active device\n", ahc_name(ahc), sdev->channel, sdev->id, (u8)sdev->lun); retval = SUCCESS; goto no_cmd; } if (cmd && (dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, cmd->device->channel + 'A', (u8)cmd->device->lun, CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { printk("%s:%d:%d:%d: Command found on untagged queue\n", ahc_name(ahc), cmd->device->channel, cmd->device->id, (u8)cmd->device->lun); retval = SUCCESS; goto done; } /* * See if we can find a matching cmd in the pending list. */ if (cmd) { LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) { if (scb->io_ctx == cmd) { pending_scb = scb; break; } } } else { /* Any SCB for this device will do for a target reset */ LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) { if (ahc_match_scb(ahc, scb, sdev->id, sdev->channel + 'A', CAM_LUN_WILDCARD, SCB_LIST_NULL, ROLE_INITIATOR)) { pending_scb = scb; break; } } } if (pending_scb == NULL) { sdev_printk(KERN_INFO, sdev, "Command not found\n"); goto no_cmd; } if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { /* * We can't queue two recovery actions using the same SCB */ retval = FAILED; goto done; } /* * Ensure that the card doesn't do anything * behind our back and that we didn't "just" miss * an interrupt that would affect this cmd. */ was_paused = ahc_is_paused(ahc); ahc_pause_and_flushwork(ahc); paused = TRUE; if ((pending_scb->flags & SCB_ACTIVE) == 0) { scmd_printk(KERN_INFO, cmd, "Command already completed\n"); goto no_cmd; } printk("%s: At time of recovery, card was %spaused\n", ahc_name(ahc), was_paused ? "" : "not "); ahc_dump_card_state(ahc); disconnected = TRUE; if (cmd) { if (ahc_search_qinfifo(ahc, sdev->id, sdev->channel + 'A', sdev->lun, pending_scb->hscb->tag, ROLE_INITIATOR, CAM_REQ_ABORTED, SEARCH_COMPLETE) > 0) { printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", ahc_name(ahc), sdev->channel, sdev->id, (u8)sdev->lun); retval = SUCCESS; goto done; } } else if (ahc_search_qinfifo(ahc, sdev->id, sdev->channel + 'A', sdev->lun, pending_scb->hscb->tag, ROLE_INITIATOR, /*status*/0, SEARCH_COUNT) > 0) { disconnected = FALSE; } if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { struct scb *bus_scb; bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); if (bus_scb == pending_scb) disconnected = FALSE; else if (!cmd && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) disconnected = FALSE; } /* * At this point, pending_scb is the scb associated with the * passed in command. That command is currently active on the * bus, is in the disconnected state, or we're hoping to find * a command for the same target active on the bus to abuse to * send a BDR. Queue the appropriate message based on which of * these states we are in. */ last_phase = ahc_inb(ahc, LASTPHASE); saved_scbptr = ahc_inb(ahc, SCBPTR); active_scb_index = ahc_inb(ahc, SCB_TAG); saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); if (last_phase != P_BUSFREE && (pending_scb->hscb->tag == active_scb_index || (!cmd && SCSIID_TARGET(ahc, saved_scsiid) == sdev->id))) { /* * We're active on the bus, so assert ATN * and hope that the target responds. */ pending_scb = ahc_lookup_scb(ahc, active_scb_index); pending_scb->flags |= SCB_RECOVERY_SCB; pending_scb->flags |= cmd ? SCB_ABORT : SCB_DEVICE_RESET; ahc_outb(ahc, MSG_OUT, HOST_MSG); ahc_outb(ahc, SCSISIGO, last_phase|ATNO); sdev_printk(KERN_INFO, sdev, "Device is active, asserting ATN\n"); wait = TRUE; } else if (disconnected) { /* * Actually re-queue this SCB in an attempt * to select the device before it reconnects. * In either case (selection or reselection), * we will now issue the approprate message * to the timed-out device. * * Set the MK_MESSAGE control bit indicating * that we desire to send a message. We * also set the disconnected flag since * in the paging case there is no guarantee * that our SCB control byte matches the * version on the card. We don't want the * sequencer to abort the command thinking * an unsolicited reselection occurred. */ pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; pending_scb->flags |= SCB_RECOVERY_SCB; pending_scb->flags |= cmd ? SCB_ABORT : SCB_DEVICE_RESET; /* * Remove any cached copy of this SCB in the * disconnected list in preparation for the * queuing of our abort SCB. We use the * same element in the SCB, SCB_NEXT, for * both the qinfifo and the disconnected list. */ ahc_search_disc_list(ahc, sdev->id, sdev->channel + 'A', sdev->lun, pending_scb->hscb->tag, /*stop_on_first*/TRUE, /*remove*/TRUE, /*save_state*/FALSE); /* * In the non-paging case, the sequencer will * never re-reference the in-core SCB. * To make sure we are notified during * reselection, set the MK_MESSAGE flag in * the card's copy of the SCB. */ if ((ahc->flags & AHC_PAGESCBS) == 0) { ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); ahc_outb(ahc, SCB_CONTROL, ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); } /* * Clear out any entries in the QINFIFO first * so we are the next SCB for this target * to run. */ ahc_search_qinfifo(ahc, sdev->id, sdev->channel + 'A', (u8)sdev->lun, SCB_LIST_NULL, ROLE_INITIATOR, CAM_REQUEUE_REQ, SEARCH_COMPLETE); ahc_qinfifo_requeue_tail(ahc, pending_scb); ahc_outb(ahc, SCBPTR, saved_scbptr); ahc_print_path(ahc, pending_scb); printk("Device is disconnected, re-queuing SCB\n"); wait = TRUE; } else { sdev_printk(KERN_INFO, sdev, "Unable to deliver message\n"); retval = FAILED; goto done; } no_cmd: /* * Our assumption is that if we don't have the command, no * recovery action was required, so we return success. Again, * the semantics of the mid-layer recovery engine are not * well defined, so this may change in time. */ retval = SUCCESS; done: if (paused) ahc_unpause(ahc); if (wait) { DECLARE_COMPLETION_ONSTACK(done); ahc->platform_data->eh_done = &done; ahc_unlock(ahc, &flags); printk("Recovery code sleeping\n"); if (!wait_for_completion_timeout(&done, 5 * HZ)) { ahc_lock(ahc, &flags); ahc->platform_data->eh_done = NULL; ahc_unlock(ahc, &flags); printk("Timer Expired\n"); retval = FAILED; } printk("Recovery code awake\n"); } else ahc_unlock(ahc, &flags); return (retval); } static void ahc_linux_set_width(struct scsi_target *starget, int width) { struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); struct ahc_devinfo devinfo; unsigned long flags; ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, starget->channel + 'A', ROLE_INITIATOR); ahc_lock(ahc, &flags); ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); ahc_unlock(ahc, &flags); } static void ahc_linux_set_period(struct scsi_target *starget, int period) { struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); struct ahc_tmode_tstate *tstate; struct ahc_initiator_tinfo *tinfo = ahc_fetch_transinfo(ahc, starget->channel + 'A', shost->this_id, starget->id, &tstate); struct ahc_devinfo devinfo; unsigned int ppr_options = tinfo->goal.ppr_options; unsigned long flags; unsigned long offset = tinfo->goal.offset; const struct ahc_syncrate *syncrate; if (offset == 0) offset = MAX_OFFSET; if (period < 9) period = 9; /* 12.5ns is our minimum */ if (period == 9) { if (spi_max_width(starget)) ppr_options |= MSG_EXT_PPR_DT_REQ; else /* need wide for DT and need DT for 12.5 ns */ period = 10; } ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, starget->channel + 'A', ROLE_INITIATOR); /* all PPR requests apart from QAS require wide transfers */ if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { if (spi_width(starget) == 0) ppr_options &= MSG_EXT_PPR_QAS_REQ; } syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); ahc_lock(ahc, &flags); ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, ppr_options, AHC_TRANS_GOAL, FALSE); ahc_unlock(ahc, &flags); } static void ahc_linux_set_offset(struct scsi_target *starget, int offset) { struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); struct ahc_tmode_tstate *tstate; struct ahc_initiator_tinfo *tinfo = ahc_fetch_transinfo(ahc, starget->channel + 'A', shost->this_id, starget->id, &tstate); struct ahc_devinfo devinfo; unsigned int ppr_options = 0; unsigned int period = 0; unsigned long flags; const struct ahc_syncrate *syncrate = NULL; ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, starget->channel + 'A', ROLE_INITIATOR); if (offset != 0) { syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); period = tinfo->goal.period; ppr_options = tinfo->goal.ppr_options; } ahc_lock(ahc, &flags); ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, ppr_options, AHC_TRANS_GOAL, FALSE); ahc_unlock(ahc, &flags); } static void ahc_linux_set_dt(struct scsi_target *starget, int dt) { struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); struct ahc_tmode_tstate *tstate; struct ahc_initiator_tinfo *tinfo = ahc_fetch_transinfo(ahc, starget->channel + 'A', shost->this_id, starget->id, &tstate); struct ahc_devinfo devinfo; unsigned int ppr_options = tinfo->goal.ppr_options & ~MSG_EXT_PPR_DT_REQ; unsigned int period = tinfo->goal.period; unsigned int width = tinfo->goal.width; unsigned long flags; const struct ahc_syncrate *syncrate; if (dt && spi_max_width(starget)) { ppr_options |= MSG_EXT_PPR_DT_REQ; if (!width) ahc_linux_set_width(starget, 1); } else if (period == 9) period = 10; /* if resetting DT, period must be >= 25ns */ ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, starget->channel + 'A', ROLE_INITIATOR); syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); ahc_lock(ahc, &flags); ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, ppr_options, AHC_TRANS_GOAL, FALSE); ahc_unlock(ahc, &flags); } #if 0 /* FIXME: This code claims to support IU and QAS. However, the actual * sequencer code and aic7xxx_core have no support for these parameters and * will get into a bad state if they're negotiated. Do not enable this * unless you know what you're doing */ static void ahc_linux_set_qas(struct scsi_target *starget, int qas) { struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); struct ahc_tmode_tstate *tstate; struct ahc_initiator_tinfo *tinfo = ahc_fetch_transinfo(ahc, starget->channel + 'A', shost->this_id, starget->id, &tstate); struct ahc_devinfo devinfo; unsigned int ppr_options = tinfo->goal.ppr_options & ~MSG_EXT_PPR_QAS_REQ; unsigned int period = tinfo->goal.period; unsigned long flags; struct ahc_syncrate *syncrate; if (qas) ppr_options |= MSG_EXT_PPR_QAS_REQ; ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, starget->channel + 'A', ROLE_INITIATOR); syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); ahc_lock(ahc, &flags); ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, ppr_options, AHC_TRANS_GOAL, FALSE); ahc_unlock(ahc, &flags); } static void ahc_linux_set_iu(struct scsi_target *starget, int iu) { struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); struct ahc_tmode_tstate *tstate; struct ahc_initiator_tinfo *tinfo = ahc_fetch_transinfo(ahc, starget->channel + 'A', shost->this_id, starget->id, &tstate); struct ahc_devinfo devinfo; unsigned int ppr_options = tinfo->goal.ppr_options & ~MSG_EXT_PPR_IU_REQ; unsigned int period = tinfo->goal.period; unsigned long flags; struct ahc_syncrate *syncrate; if (iu) ppr_options |= MSG_EXT_PPR_IU_REQ; ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, starget->channel + 'A', ROLE_INITIATOR); syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); ahc_lock(ahc, &flags); ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, ppr_options, AHC_TRANS_GOAL, FALSE); ahc_unlock(ahc, &flags); } #endif static void ahc_linux_get_signalling(struct Scsi_Host *shost) { struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata; unsigned long flags; u8 mode; if (!(ahc->features & AHC_ULTRA2)) { /* non-LVD chipset, may not have SBLKCTL reg */ spi_signalling(shost) = ahc->features & AHC_HVD ? SPI_SIGNAL_HVD : SPI_SIGNAL_SE; return; } ahc_lock(ahc, &flags); ahc_pause(ahc); mode = ahc_inb(ahc, SBLKCTL); ahc_unpause(ahc); ahc_unlock(ahc, &flags); if (mode & ENAB40) spi_signalling(shost) = SPI_SIGNAL_LVD; else if (mode & ENAB20) spi_signalling(shost) = SPI_SIGNAL_SE; else spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; } static struct spi_function_template ahc_linux_transport_functions = { .set_offset = ahc_linux_set_offset, .show_offset = 1, .set_period = ahc_linux_set_period, .show_period = 1, .set_width = ahc_linux_set_width, .show_width = 1, .set_dt = ahc_linux_set_dt, .show_dt = 1, #if 0 .set_iu = ahc_linux_set_iu, .show_iu = 1, .set_qas = ahc_linux_set_qas, .show_qas = 1, #endif .get_signalling = ahc_linux_get_signalling, }; static int __init ahc_linux_init(void) { /* * If we've been passed any parameters, process them now. */ if (aic7xxx) aic7xxx_setup(aic7xxx); ahc_linux_transport_template = spi_attach_transport(&ahc_linux_transport_functions); if (!ahc_linux_transport_template) return -ENODEV; scsi_transport_reserve_device(ahc_linux_transport_template, sizeof(struct ahc_linux_device)); ahc_linux_pci_init(); ahc_linux_eisa_init(); return 0; } static void ahc_linux_exit(void) { ahc_linux_pci_exit(); ahc_linux_eisa_exit(); spi_release_transport(ahc_linux_transport_template); } module_init(ahc_linux_init); module_exit(ahc_linux_exit);
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