863c602654
black hole device. The controller will now only accept selections if the black hole device is present and some other target/lun is enabled for target mode. Handle the IGNORE WIDE RESIDUE message. This support has not been tested. Checkpoint work on handling ABORT, BUS DEVICE RESET, TERMINATE I/O PROCESS, and CLEAR QUEUE messages as a target. Fix a few problems with tagged command handling in target mode. Wait until the sync offset counter falls to 0 before changing phase after a data-in transfer completes as the DMA logic seems to indicate transfer complete as soon as our last REQ is issued. Simplify some of the target mode message handling code in the sequencer.
550 lines
16 KiB
C
550 lines
16 KiB
C
/*
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* Interface to the generic driver for the aic7xxx based adaptec
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* SCSI controllers. This is used to implement product specific
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* probe and attach routines.
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*
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* Copyright (c) 1994, 1995, 1996, 1997, 1998 Justin T. Gibbs.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification, immediately at the beginning of the file.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* Where this Software is combined with software released under the terms of
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* the GNU Public License ("GPL") and the terms of the GPL would require the
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* combined work to also be released under the terms of the GPL, the terms
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* and conditions of this License will apply in addition to those of the
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* GPL with the exception of any terms or conditions of this License that
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* conflict with, or are expressly prohibited by, the GPL.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: aic7xxx.h,v 1.4 1998/12/15 08:22:41 gibbs Exp $
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*/
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#ifndef _AIC7XXX_H_
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#define _AIC7XXX_H_
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#include "ahc.h" /* for NAHC from config */
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#include "opt_aic7xxx.h" /* for config options */
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#include <pci/pcivar.h> /* for pcici_t */
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#define AHC_MAXTRANSFER_SIZE 0x00ffffff /* limited by 24bit counter */
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#define AHC_NSEG 32 /* The number of dma segments supported.
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* AHC_NSEG can be maxed out at 256 entries,
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* but the kernel will never need to transfer
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* such a large (1MB) request. To reduce the
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* driver's memory consumption, we reduce the
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* max to 32. 16 would work if all transfers
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* are paged alined since the kernel will only
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* generate at most a 64k transfer, but to
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* handle non-page aligned transfers, you need
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* 17, so we round to the next power of two
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* to make allocating SG space easy and
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* efficient.
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*/
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#define AHC_SCB_MAX 255 /*
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* Up to 255 SCBs on some types of aic7xxx
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* based boards. The aic7870 have 16 internal
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* SCBs, but external SRAM bumps this to 255.
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* The aic7770 family have only 4, and the
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* aic7850 has only 3.
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*/
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#define AHC_TMODE_CMDS 256 /*
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* Ring Buffer of incoming target commands.
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* We allocate 256 to simplify the logic
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* in the sequencer by using the natural
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* wrap point of an 8bit counter.
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*/
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#if defined(__FreeBSD__)
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extern u_long ahc_unit;
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#endif
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struct ahc_dma_seg {
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u_int32_t addr;
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u_int32_t len;
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};
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typedef enum {
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AHC_NONE = 0x0000,
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AHC_CHIPID_MASK = 0x00FF,
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AHC_AIC7770 = 0x0001,
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AHC_AIC7850 = 0x0002,
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AHC_AIC7860 = 0x0003,
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AHC_AIC7870 = 0x0004,
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AHC_AIC7880 = 0x0005,
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AHC_AIC7890 = 0x0006,
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AHC_AIC7895 = 0x0007,
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AHC_AIC7896 = 0x0008,
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AHC_VL = 0x0100, /* Bus type VL */
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AHC_EISA = 0x0200, /* Bus type EISA */
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AHC_PCI = 0x0400, /* Bus type PCI */
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} ahc_chip;
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typedef enum {
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AHC_FENONE = 0x0000,
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AHC_ULTRA = 0x0001, /* Supports 20MHz Transfers */
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AHC_ULTRA2 = 0x0002, /* Supports 40MHz Transfers */
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AHC_WIDE = 0x0004, /* Wide Channel */
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AHC_TWIN = 0x0008, /* Twin Channel */
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AHC_MORE_SRAM = 0x0010, /* 80 bytes instead of 64 */
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AHC_CMD_CHAN = 0x0020, /* Has a Command DMA Channel */
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AHC_QUEUE_REGS = 0x0040, /* Has Queue management registers */
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AHC_SG_PRELOAD = 0x0080, /* Can perform auto-SG preload */
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AHC_SPIOCAP = 0x0100, /* Has a Serial Port I/O Cap Register */
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AHC_MULTI_TID = 0x0200, /* Has bitmask of TIDs for select-in */
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AHC_AIC7770_FE = AHC_FENONE,
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AHC_AIC7850_FE = AHC_FENONE|AHC_SPIOCAP,
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AHC_AIC7860_FE = AHC_ULTRA|AHC_SPIOCAP,
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AHC_AIC7870_FE = AHC_FENONE,
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AHC_AIC7880_FE = AHC_ULTRA,
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AHC_AIC7890_FE = AHC_MORE_SRAM|AHC_CMD_CHAN|AHC_ULTRA2|AHC_QUEUE_REGS
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|AHC_SG_PRELOAD|AHC_MULTI_TID,
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AHC_AIC7895_FE = AHC_MORE_SRAM|AHC_CMD_CHAN|AHC_ULTRA,
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AHC_AIC7896_FE = AHC_MORE_SRAM|AHC_CMD_CHAN|AHC_ULTRA2|AHC_QUEUE_REGS
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|AHC_SG_PRELOAD|AHC_MULTI_TID,
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} ahc_feature;
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typedef enum {
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AHC_FNONE = 0x000,
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AHC_PAGESCBS = 0x001,/* Enable SCB paging */
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AHC_CHANNEL_B_PRIMARY = 0x002,/*
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* On twin channel adapters, probe
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* channel B first since it is the
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* primary bus.
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*/
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AHC_USEDEFAULTS = 0x004,/*
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* For cards without an seeprom
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* or a BIOS to initialize the chip's
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* SRAM, we use the default target
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* settings.
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*/
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AHC_INDIRECT_PAGING = 0x008,
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AHC_SHARED_SRAM = 0x010,
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AHC_LARGE_SEEPROM = 0x020,/* Uses C56_66 not C46 */
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AHC_RESET_BUS_A = 0x040,
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AHC_RESET_BUS_B = 0x080,
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AHC_EXTENDED_TRANS_A = 0x100,
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AHC_EXTENDED_TRANS_B = 0x200,
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AHC_TERM_ENB_A = 0x400,
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AHC_TERM_ENB_B = 0x800,
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AHC_INITIATORMODE = 0x1000,/*
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* Allow initiator operations on
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* this controller.
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*/
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AHC_TARGETMODE = 0x2000,/*
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* Allow target operations on this
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* controller.
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*/
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AHC_NEWEEPROM_FMT = 0x4000,
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AHC_RESOURCE_SHORTAGE = 0x8000
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} ahc_flag;
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typedef enum {
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SCB_FREE = 0x0000,
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SCB_OTHERTCL_TIMEOUT = 0x0002,/*
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* Another device was active
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* during the first timeout for
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* this SCB so we gave ourselves
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* an additional timeout period
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* in case it was hogging the
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* bus.
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*/
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SCB_DEVICE_RESET = 0x0004,
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SCB_SENSE = 0x0008,
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SCB_RECOVERY_SCB = 0x0040,
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SCB_ABORT = 0x1000,
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SCB_QUEUED_MSG = 0x2000,
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SCB_ACTIVE = 0x4000,
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SCB_TARGET_IMMEDIATE = 0x8000
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} scb_flag;
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/*
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* The driver keeps up to MAX_SCB scb structures per card in memory. The SCB
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* consists of a "hardware SCB" mirroring the fields availible on the card
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* and additional information the kernel stores for each transaction.
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*/
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struct hardware_scb {
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/*0*/ u_int8_t control;
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/*1*/ u_int8_t tcl; /* 4/1/3 bits */
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/*2*/ u_int8_t status;
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/*3*/ u_int8_t SG_count;
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/*4*/ u_int32_t SG_pointer;
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/*8*/ u_int8_t residual_SG_count;
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/*9*/ u_int8_t residual_data_count[3];
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/*12*/ u_int32_t data;
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/*16*/ u_int32_t datalen; /* Really only three bytes, but its
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* faster to treat it as a long on
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* a quad boundary.
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*/
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/*20*/ u_int32_t cmdpointer;
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/*24*/ u_int8_t cmdlen;
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/*25*/ u_int8_t tag; /* Index into our kernel SCB array.
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* Also used as the tag for tagged I/O
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*/
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/*26*/ u_int8_t next; /* Used for threading SCBs in the
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* "Waiting for Selection" and
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* "Disconnected SCB" lists down
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* in the sequencer.
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*/
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/*27*/ u_int8_t scsirate; /* Value for SCSIRATE register */
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/*28*/ u_int8_t scsioffset; /* Value for SCSIOFFSET register */
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/*29*/ u_int8_t spare[3]; /*
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* Spare space available on
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* all controller types.
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*/
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/*32*/ u_int8_t cmdstore[16]; /*
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* CDB storage for controllers
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* supporting 64 byte SCBs.
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*/
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/*48*/ u_int32_t cmdstore_busaddr; /*
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* Address of command store for
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* 32byte SCB adapters
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*/
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/*48*/ u_int8_t spare_64[12]; /*
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* Pad to 64 bytes.
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*/
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};
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struct scb {
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struct hardware_scb *hscb;
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STAILQ_ENTRY(scb) links; /* for chaining */
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union ccb *ccb; /* the ccb for this cmd */
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scb_flag flags;
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bus_dmamap_t dmamap;
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struct ahc_dma_seg *ahc_dma;/* Pointer to SG segments */
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u_int32_t ahc_dmaphys;/* Phsical address of SG list */
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u_int sg_count;/* How full ahc_dma_seg is */
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};
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struct scb_data {
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struct hardware_scb *hscbs; /* Array of hardware SCBs */
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struct scb *scbarray[AHC_SCB_MAX]; /* Array of kernel SCBs */
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STAILQ_HEAD(, scb) free_scbs; /*
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* Pool of SCBs ready to be assigned
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* commands to execute.
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*/
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u_int8_t numscbs;
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u_int8_t maxhscbs; /* Number of SCBs on the card */
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u_int8_t maxscbs; /*
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* Max SCBs we allocate total including
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* any that will force us to page SCBs
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*/
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};
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/*
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* Connection desciptor for select-in requests in target mode.
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* The first byte is the connecting target, followed by identify
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* message and optional tag information, terminated by 0xFF. The
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* remainder is the command to execute. The cmd_valid byte is on
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* an 8 byte boundary to simplify setting it on aic7880 hardware
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* which only has limited direct access to the DMA FIFO.
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*/
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struct target_cmd {
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u_int8_t initiator_channel;
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u_int8_t targ_id; /* Target ID we were selected at */
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u_int8_t identify; /* Identify message */
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u_int8_t bytes[21];
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u_int8_t cmd_valid;
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u_int8_t pad[7];
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};
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/*
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* Per lun target mode state including accept TIO CCB
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* and immediate notify CCB pools.
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*/
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struct tmode_lstate {
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struct ccb_hdr_slist accept_tios;
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struct ccb_hdr_slist immed_notifies;
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};
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/*
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* Per target mode enabled target state. Esentially just an array of
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* pointers to lun target state.
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*/
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struct tmode_tstate {
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struct tmode_lstate* enabled_luns[8];
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};
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/*
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* Define the format of the aic7XX0 SEEPROM registers (16 bits).
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*/
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struct seeprom_config {
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/*
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* SCSI ID Configuration Flags
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*/
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u_int16_t device_flags[16]; /* words 0-15 */
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#define CFXFER 0x0007 /* synchronous transfer rate */
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#define CFSYNCH 0x0008 /* enable synchronous transfer */
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#define CFDISC 0x0010 /* enable disconnection */
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#define CFWIDEB 0x0020 /* wide bus device */
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#define CFSYNCHISULTRA 0x0040 /* CFSYNCH is an ultra offset (2940AU)*/
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/* UNUSED 0x0080 */
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#define CFSTART 0x0100 /* send start unit SCSI command */
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#define CFINCBIOS 0x0200 /* include in BIOS scan */
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#define CFRNFOUND 0x0400 /* report even if not found */
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#define CFMULTILUN 0x0800 /* Probe multiple luns in BIOS scan */
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/* UNUSED 0xf000 */
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/*
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* BIOS Control Bits
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*/
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u_int16_t bios_control; /* word 16 */
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#define CFSUPREM 0x0001 /* support all removeable drives */
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#define CFSUPREMB 0x0002 /* support removeable drives for boot only */
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#define CFBIOSEN 0x0004 /* BIOS enabled */
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/* UNUSED 0x0008 */
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#define CFSM2DRV 0x0010 /* support more than two drives */
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#define CF284XEXTEND 0x0020 /* extended translation (284x cards) */
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/* UNUSED 0x0060 */
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#define CFEXTEND 0x0080 /* extended translation enabled */
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/* UNUSED 0xff00 */
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/*
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* Host Adapter Control Bits
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*/
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u_int16_t adapter_control; /* word 17 */
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#define CFAUTOTERM 0x0001 /* Perform Auto termination */
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#define CFULTRAEN 0x0002 /* Ultra SCSI speed enable */
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#define CF284XSELTO 0x0003 /* Selection timeout (284x cards) */
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#define CF284XFIFO 0x000C /* FIFO Threshold (284x cards) */
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#define CFSTERM 0x0004 /* SCSI low byte termination */
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#define CFWSTERM 0x0008 /* SCSI high byte termination */
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#define CFSPARITY 0x0010 /* SCSI parity */
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#define CF284XSTERM 0x0020 /* SCSI low byte term (284x cards) */
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#define CFRESETB 0x0040 /* reset SCSI bus at boot */
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#define CFCHNLBPRIMARY 0x0100 /* aic7895 probe B channel first */
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#define CFSEAUTOTERM 0x0400 /* aic7890 Perform SE Auto Termination*/
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#define CFLVDSTERM 0x0800 /* aic7890 LVD Termination */
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/* UNUSED 0xf080 */
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/*
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* Bus Release, Host Adapter ID
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*/
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u_int16_t brtime_id; /* word 18 */
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#define CFSCSIID 0x000f /* host adapter SCSI ID */
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/* UNUSED 0x00f0 */
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#define CFBRTIME 0xff00 /* bus release time */
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/*
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* Maximum targets
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*/
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u_int16_t max_targets; /* word 19 */
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#define CFMAXTARG 0x00ff /* maximum targets */
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/* UNUSED 0xff00 */
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u_int16_t res_1[11]; /* words 20-30 */
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u_int16_t checksum; /* word 31 */
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};
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#define AHC_TRANS_CUR 0x01 /* Modify current neogtiation status */
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#define AHC_TRANS_ACTIVE 0x03 /* Assume this is the active target */
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#define AHC_TRANS_GOAL 0x04 /* Modify negotiation goal */
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#define AHC_TRANS_USER 0x08 /* Modify user negotiation settings */
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struct ahc_transinfo {
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u_int8_t width;
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u_int8_t period;
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u_int8_t offset;
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};
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struct ahc_target_tinfo {
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u_int8_t scsirate;
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struct ahc_transinfo current;
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struct ahc_transinfo goal;
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struct ahc_transinfo user;
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};
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struct ahc_syncrate {
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int sxfr_ultra2;
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int sxfr;
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/* Rates in Ultra mode have bit 8 of sxfr set */
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#define ULTRA_SXFR 0x100
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u_int8_t period; /* Period to send to SCSI target */
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char *rate;
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};
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typedef enum {
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MSG_TYPE_NONE = 0x00,
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MSG_TYPE_INITIATOR_MSGOUT = 0x01,
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MSG_TYPE_INITIATOR_MSGIN = 0x02,
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MSG_TYPE_TARGET_MSGOUT = 0x03,
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MSG_TYPE_TARGET_MSGIN = 0x04
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} ahc_msg_type;
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struct ahc_softc {
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bus_space_tag_t tag;
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bus_space_handle_t bsh;
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bus_dma_tag_t dmat;
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struct scb_data *scb_data;
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/*
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* CCBs that have been send to the controller
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*/
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LIST_HEAD(, ccb_hdr) pending_ccbs;
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/*
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* Target mode related state kept on a per enabled lun basis.
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* Targets that are not enabled will have null entries.
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*/
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struct tmode_tstate* enabled_targets[16];
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/*
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* The black hole device responsible for handling requests for
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* disabled luns on enabled targets.
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*/
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struct tmode_lstate* black_hole;
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/*
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* Device instance currently on the bus awaiting a continue TIO
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* for a command that was not given the disconnect priveledge.
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*/
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struct tmode_lstate* pending_device;
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/*
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* Card characteristics
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*/
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ahc_chip chip;
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ahc_feature features;
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ahc_flag flags;
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/* Values to store in the SEQCTL register for pause and unpause */
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u_int8_t unpause;
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u_int8_t pause;
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/* Command Queues */
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u_int8_t qoutfifonext;
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u_int8_t qinfifonext;
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u_int8_t qoutfifo[256];
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u_int8_t qinfifo[256];
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/*
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* 256 byte array storing the SCBID of outstanding
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* untagged SCBs indexed by TCL.
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*/
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u_int8_t untagged_scbs[256];
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/*
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* User/Current/Active Negotiation settings
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*/
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struct ahc_target_tinfo transinfo[16];
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/*
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* Per target state bitmasks.
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*/
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u_int16_t ultraenb; /* Using ultra sync rate */
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u_int16_t discenable; /* Disconnection allowed */
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u_int16_t tagenable; /* Tagged Queuing allowed */
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u_int16_t targ_msg_req; /* Need negotiation messages */
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/*
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* Hooks into the XPT.
|
|
*/
|
|
struct cam_sim *sim;
|
|
struct cam_sim *sim_b;
|
|
struct cam_path *path;
|
|
struct cam_path *path_b;
|
|
|
|
int unit;
|
|
|
|
/* Channel Names ('A', 'B', etc.) */
|
|
char channel;
|
|
char channel_b;
|
|
|
|
/* Initiator Bus ID */
|
|
u_int8_t our_id;
|
|
u_int8_t our_id_b;
|
|
|
|
/*
|
|
* PCI error detection and data for running the
|
|
* PCI error interrupt handler.
|
|
*/
|
|
int unsolicited_ints;
|
|
pcici_t pci_config_id;
|
|
|
|
/*
|
|
* Target incoming command FIFO.
|
|
*/
|
|
struct target_cmd *targetcmds;
|
|
u_int8_t tqinfifonext;
|
|
|
|
/*
|
|
* Incoming and outgoing message handling.
|
|
*/
|
|
u_int8_t send_msg_perror;
|
|
ahc_msg_type msg_type;
|
|
u_int8_t msgout_buf[8]; /* Message we are sending */
|
|
u_int8_t msgin_buf[8]; /* Message we are receiving */
|
|
u_int msgout_len; /* Length of message to send */
|
|
u_int msgout_index; /* Current index in msgout */
|
|
u_int msgin_index; /* Current index in msgin */
|
|
|
|
u_int enabled_luns;
|
|
|
|
/*
|
|
* "Bus" addresses of our data structures.
|
|
*/
|
|
u_int32_t hscb_busaddr;
|
|
};
|
|
|
|
struct full_ahc_softc {
|
|
struct ahc_softc softc;
|
|
struct scb_data scb_data_storage;
|
|
};
|
|
|
|
/* #define AHC_DEBUG */
|
|
#ifdef AHC_DEBUG
|
|
/* Different debugging levels used when AHC_DEBUG is defined */
|
|
#define AHC_SHOWMISC 0x0001
|
|
#define AHC_SHOWCMDS 0x0002
|
|
#define AHC_SHOWSCBS 0x0004
|
|
#define AHC_SHOWABORTS 0x0008
|
|
#define AHC_SHOWSENSE 0x0010
|
|
#define AHC_SHOWSCBCNT 0x0020
|
|
|
|
extern int ahc_debug; /* Initialized in i386/scsi/aic7xxx.c */
|
|
#endif
|
|
|
|
char *ahc_name(struct ahc_softc *ahc);
|
|
|
|
struct ahc_softc *ahc_alloc(int unit, u_int32_t io_base,
|
|
vm_offset_t maddr, ahc_chip chip,
|
|
ahc_feature features, ahc_flag flags,
|
|
struct scb_data *scb_data);
|
|
int ahc_reset(struct ahc_softc *ahc);
|
|
void ahc_free(struct ahc_softc *);
|
|
int ahc_probe_scbs(struct ahc_softc *);
|
|
int ahc_init(struct ahc_softc *);
|
|
int ahc_attach(struct ahc_softc *);
|
|
void ahc_intr(void *arg);
|
|
|
|
#define ahc_inb(ahc, port) \
|
|
bus_space_read_1((ahc)->tag, (ahc)->bsh, port)
|
|
|
|
#define ahc_outb(ahc, port, value) \
|
|
bus_space_write_1((ahc)->tag, (ahc)->bsh, port, value)
|
|
|
|
#define ahc_outsb(ahc, port, valp, count) \
|
|
bus_space_write_multi_1((ahc)->tag, (ahc)->bsh, port, valp, count)
|
|
|
|
#endif /* _AIC7XXX_H_ */
|