| /* |
| * dc395x.c |
| * |
| * Device Driver for Tekram DC395(U/UW/F), DC315(U) |
| * PCI SCSI Bus Master Host Adapter |
| * (SCSI chip set used Tekram ASIC TRM-S1040) |
| * |
| * Authors: |
| * C.L. Huang <ching@tekram.com.tw> |
| * Erich Chen <erich@tekram.com.tw> |
| * (C) Copyright 1995-1999 Tekram Technology Co., Ltd. |
| * |
| * Kurt Garloff <garloff@suse.de> |
| * (C) 1999-2000 Kurt Garloff |
| * |
| * Oliver Neukum <oliver@neukum.name> |
| * Ali Akcaagac <aliakc@web.de> |
| * Jamie Lenehan <lenehan@twibble.org> |
| * (C) 2003 |
| * |
| * License: GNU GPL |
| * |
| ************************************************************************* |
| * |
| * 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. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, 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 DAMAGE. |
| * |
| ************************************************************************ |
| */ |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/delay.h> |
| #include <linux/ctype.h> |
| #include <linux/blkdev.h> |
| #include <linux/interrupt.h> |
| #include <linux/init.h> |
| #include <linux/spinlock.h> |
| #include <linux/pci.h> |
| #include <linux/list.h> |
| #include <linux/vmalloc.h> |
| #include <linux/slab.h> |
| #include <asm/io.h> |
| |
| #include <scsi/scsi.h> |
| #include <scsi/scsicam.h> /* needed for scsicam_bios_param */ |
| #include <scsi/scsi_cmnd.h> |
| #include <scsi/scsi_device.h> |
| #include <scsi/scsi_host.h> |
| |
| #include "dc395x.h" |
| |
| #define DC395X_NAME "dc395x" |
| #define DC395X_BANNER "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040" |
| #define DC395X_VERSION "v2.05, 2004/03/08" |
| |
| /*--------------------------------------------------------------------------- |
| Features |
| ---------------------------------------------------------------------------*/ |
| /* |
| * Set to disable parts of the driver |
| */ |
| /*#define DC395x_NO_DISCONNECT*/ |
| /*#define DC395x_NO_TAGQ*/ |
| /*#define DC395x_NO_SYNC*/ |
| /*#define DC395x_NO_WIDE*/ |
| |
| /*--------------------------------------------------------------------------- |
| Debugging |
| ---------------------------------------------------------------------------*/ |
| /* |
| * Types of debugging that can be enabled and disabled |
| */ |
| #define DBG_KG 0x0001 |
| #define DBG_0 0x0002 |
| #define DBG_1 0x0004 |
| #define DBG_SG 0x0020 |
| #define DBG_FIFO 0x0040 |
| #define DBG_PIO 0x0080 |
| |
| |
| /* |
| * Set set of things to output debugging for. |
| * Undefine to remove all debugging |
| */ |
| /*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/ |
| /*#define DEBUG_MASK DBG_0*/ |
| |
| |
| /* |
| * Output a kernel mesage at the specified level and append the |
| * driver name and a ": " to the start of the message |
| */ |
| #define dprintkl(level, format, arg...) \ |
| printk(level DC395X_NAME ": " format , ## arg) |
| |
| |
| #ifdef DEBUG_MASK |
| /* |
| * print a debug message - this is formated with KERN_DEBUG, then the |
| * driver name followed by a ": " and then the message is output. |
| * This also checks that the specified debug level is enabled before |
| * outputing the message |
| */ |
| #define dprintkdbg(type, format, arg...) \ |
| do { \ |
| if ((type) & (DEBUG_MASK)) \ |
| dprintkl(KERN_DEBUG , format , ## arg); \ |
| } while (0) |
| |
| /* |
| * Check if the specified type of debugging is enabled |
| */ |
| #define debug_enabled(type) ((DEBUG_MASK) & (type)) |
| |
| #else |
| /* |
| * No debugging. Do nothing |
| */ |
| #define dprintkdbg(type, format, arg...) \ |
| do {} while (0) |
| #define debug_enabled(type) (0) |
| |
| #endif |
| |
| |
| #ifndef PCI_VENDOR_ID_TEKRAM |
| #define PCI_VENDOR_ID_TEKRAM 0x1DE1 /* Vendor ID */ |
| #endif |
| #ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040 |
| #define PCI_DEVICE_ID_TEKRAM_TRMS1040 0x0391 /* Device ID */ |
| #endif |
| |
| |
| #define DC395x_LOCK_IO(dev,flags) spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags) |
| #define DC395x_UNLOCK_IO(dev,flags) spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags) |
| |
| #define DC395x_read8(acb,address) (u8)(inb(acb->io_port_base + (address))) |
| #define DC395x_read16(acb,address) (u16)(inw(acb->io_port_base + (address))) |
| #define DC395x_read32(acb,address) (u32)(inl(acb->io_port_base + (address))) |
| #define DC395x_write8(acb,address,value) outb((value), acb->io_port_base + (address)) |
| #define DC395x_write16(acb,address,value) outw((value), acb->io_port_base + (address)) |
| #define DC395x_write32(acb,address,value) outl((value), acb->io_port_base + (address)) |
| |
| /* cmd->result */ |
| #define RES_TARGET 0x000000FF /* Target State */ |
| #define RES_TARGET_LNX STATUS_MASK /* Only official ... */ |
| #define RES_ENDMSG 0x0000FF00 /* End Message */ |
| #define RES_DID 0x00FF0000 /* DID_ codes */ |
| #define RES_DRV 0xFF000000 /* DRIVER_ codes */ |
| |
| #define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)) |
| #define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1) |
| |
| #define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); } |
| #define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; } |
| #define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; } |
| #define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; } |
| #define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; } |
| |
| #define TAG_NONE 255 |
| |
| /* |
| * srb->segement_x is the hw sg list. It is always allocated as a |
| * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not |
| * cross a page boundy. |
| */ |
| #define SEGMENTX_LEN (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY) |
| |
| |
| struct SGentry { |
| u32 address; /* bus! address */ |
| u32 length; |
| }; |
| |
| /* The SEEPROM structure for TRM_S1040 */ |
| struct NVRamTarget { |
| u8 cfg0; /* Target configuration byte 0 */ |
| u8 period; /* Target period */ |
| u8 cfg2; /* Target configuration byte 2 */ |
| u8 cfg3; /* Target configuration byte 3 */ |
| }; |
| |
| struct NvRamType { |
| u8 sub_vendor_id[2]; /* 0,1 Sub Vendor ID */ |
| u8 sub_sys_id[2]; /* 2,3 Sub System ID */ |
| u8 sub_class; /* 4 Sub Class */ |
| u8 vendor_id[2]; /* 5,6 Vendor ID */ |
| u8 device_id[2]; /* 7,8 Device ID */ |
| u8 reserved; /* 9 Reserved */ |
| struct NVRamTarget target[DC395x_MAX_SCSI_ID]; |
| /** 10,11,12,13 |
| ** 14,15,16,17 |
| ** .... |
| ** .... |
| ** 70,71,72,73 |
| */ |
| u8 scsi_id; /* 74 Host Adapter SCSI ID */ |
| u8 channel_cfg; /* 75 Channel configuration */ |
| u8 delay_time; /* 76 Power on delay time */ |
| u8 max_tag; /* 77 Maximum tags */ |
| u8 reserved0; /* 78 */ |
| u8 boot_target; /* 79 */ |
| u8 boot_lun; /* 80 */ |
| u8 reserved1; /* 81 */ |
| u16 reserved2[22]; /* 82,..125 */ |
| u16 cksum; /* 126,127 */ |
| }; |
| |
| struct ScsiReqBlk { |
| struct list_head list; /* next/prev ptrs for srb lists */ |
| struct DeviceCtlBlk *dcb; |
| struct scsi_cmnd *cmd; |
| |
| struct SGentry *segment_x; /* Linear array of hw sg entries (up to 64 entries) */ |
| dma_addr_t sg_bus_addr; /* Bus address of sg list (ie, of segment_x) */ |
| |
| u8 sg_count; /* No of HW sg entries for this request */ |
| u8 sg_index; /* Index of HW sg entry for this request */ |
| size_t total_xfer_length; /* Total number of bytes remaining to be transferred */ |
| size_t request_length; /* Total number of bytes in this request */ |
| /* |
| * The sense buffer handling function, request_sense, uses |
| * the first hw sg entry (segment_x[0]) and the transfer |
| * length (total_xfer_length). While doing this it stores the |
| * original values into the last sg hw list |
| * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the |
| * total_xfer_length in xferred. These values are restored in |
| * pci_unmap_srb_sense. This is the only place xferred is used. |
| */ |
| size_t xferred; /* Saved copy of total_xfer_length */ |
| |
| u16 state; |
| |
| u8 msgin_buf[6]; |
| u8 msgout_buf[6]; |
| |
| u8 adapter_status; |
| u8 target_status; |
| u8 msg_count; |
| u8 end_message; |
| |
| u8 tag_number; |
| u8 status; |
| u8 retry_count; |
| u8 flag; |
| |
| u8 scsi_phase; |
| }; |
| |
| struct DeviceCtlBlk { |
| struct list_head list; /* next/prev ptrs for the dcb list */ |
| struct AdapterCtlBlk *acb; |
| struct list_head srb_going_list; /* head of going srb list */ |
| struct list_head srb_waiting_list; /* head of waiting srb list */ |
| |
| struct ScsiReqBlk *active_srb; |
| u32 tag_mask; |
| |
| u16 max_command; |
| |
| u8 target_id; /* SCSI Target ID (SCSI Only) */ |
| u8 target_lun; /* SCSI Log. Unit (SCSI Only) */ |
| u8 identify_msg; |
| u8 dev_mode; |
| |
| u8 inquiry7; /* To store Inquiry flags */ |
| u8 sync_mode; /* 0:async mode */ |
| u8 min_nego_period; /* for nego. */ |
| u8 sync_period; /* for reg. */ |
| |
| u8 sync_offset; /* for reg. and nego.(low nibble) */ |
| u8 flag; |
| u8 dev_type; |
| u8 init_tcq_flag; |
| }; |
| |
| struct AdapterCtlBlk { |
| struct Scsi_Host *scsi_host; |
| |
| unsigned long io_port_base; |
| unsigned long io_port_len; |
| |
| struct list_head dcb_list; /* head of going dcb list */ |
| struct DeviceCtlBlk *dcb_run_robin; |
| struct DeviceCtlBlk *active_dcb; |
| |
| struct list_head srb_free_list; /* head of free srb list */ |
| struct ScsiReqBlk *tmp_srb; |
| struct timer_list waiting_timer; |
| struct timer_list selto_timer; |
| |
| u16 srb_count; |
| |
| u8 sel_timeout; |
| |
| unsigned int irq_level; |
| u8 tag_max_num; |
| u8 acb_flag; |
| u8 gmode2; |
| |
| u8 config; |
| u8 lun_chk; |
| u8 scan_devices; |
| u8 hostid_bit; |
| |
| u8 dcb_map[DC395x_MAX_SCSI_ID]; |
| struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32]; |
| |
| struct pci_dev *dev; |
| |
| u8 msg_len; |
| |
| struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT]; |
| struct ScsiReqBlk srb; |
| |
| struct NvRamType eeprom; /* eeprom settings for this adapter */ |
| }; |
| |
| |
| /*--------------------------------------------------------------------------- |
| Forward declarations |
| ---------------------------------------------------------------------------*/ |
| static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status); |
| static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status); |
| static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status); |
| static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status); |
| static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status); |
| static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status); |
| static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status); |
| static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status); |
| static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status); |
| static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status); |
| static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status); |
| static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status); |
| static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status); |
| static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status); |
| static void set_basic_config(struct AdapterCtlBlk *acb); |
| static void cleanup_after_transfer(struct AdapterCtlBlk *acb, |
| struct ScsiReqBlk *srb); |
| static void reset_scsi_bus(struct AdapterCtlBlk *acb); |
| static void data_io_transfer(struct AdapterCtlBlk *acb, |
| struct ScsiReqBlk *srb, u16 io_dir); |
| static void disconnect(struct AdapterCtlBlk *acb); |
| static void reselect(struct AdapterCtlBlk *acb); |
| static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, |
| struct ScsiReqBlk *srb); |
| static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, |
| struct ScsiReqBlk *srb); |
| static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, |
| struct ScsiReqBlk *srb); |
| static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code, |
| struct scsi_cmnd *cmd, u8 force); |
| static void scsi_reset_detect(struct AdapterCtlBlk *acb); |
| static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb); |
| static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, |
| struct ScsiReqBlk *srb); |
| static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, |
| struct ScsiReqBlk *srb); |
| static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, |
| struct ScsiReqBlk *srb); |
| static void set_xfer_rate(struct AdapterCtlBlk *acb, |
| struct DeviceCtlBlk *dcb); |
| static void waiting_timeout(unsigned long ptr); |
| |
| |
| /*--------------------------------------------------------------------------- |
| Static Data |
| ---------------------------------------------------------------------------*/ |
| static u16 current_sync_offset = 0; |
| |
| static void *dc395x_scsi_phase0[] = { |
| data_out_phase0,/* phase:0 */ |
| data_in_phase0, /* phase:1 */ |
| command_phase0, /* phase:2 */ |
| status_phase0, /* phase:3 */ |
| nop0, /* phase:4 PH_BUS_FREE .. initial phase */ |
| nop0, /* phase:5 PH_BUS_FREE .. initial phase */ |
| msgout_phase0, /* phase:6 */ |
| msgin_phase0, /* phase:7 */ |
| }; |
| |
| static void *dc395x_scsi_phase1[] = { |
| data_out_phase1,/* phase:0 */ |
| data_in_phase1, /* phase:1 */ |
| command_phase1, /* phase:2 */ |
| status_phase1, /* phase:3 */ |
| nop1, /* phase:4 PH_BUS_FREE .. initial phase */ |
| nop1, /* phase:5 PH_BUS_FREE .. initial phase */ |
| msgout_phase1, /* phase:6 */ |
| msgin_phase1, /* phase:7 */ |
| }; |
| |
| /* |
| *Fast20: 000 50ns, 20.0 MHz |
| * 001 75ns, 13.3 MHz |
| * 010 100ns, 10.0 MHz |
| * 011 125ns, 8.0 MHz |
| * 100 150ns, 6.6 MHz |
| * 101 175ns, 5.7 MHz |
| * 110 200ns, 5.0 MHz |
| * 111 250ns, 4.0 MHz |
| * |
| *Fast40(LVDS): 000 25ns, 40.0 MHz |
| * 001 50ns, 20.0 MHz |
| * 010 75ns, 13.3 MHz |
| * 011 100ns, 10.0 MHz |
| * 100 125ns, 8.0 MHz |
| * 101 150ns, 6.6 MHz |
| * 110 175ns, 5.7 MHz |
| * 111 200ns, 5.0 MHz |
| */ |
| /*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/ |
| |
| /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */ |
| static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 }; |
| static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 }; |
| |
| |
| /*--------------------------------------------------------------------------- |
| Configuration |
| ---------------------------------------------------------------------------*/ |
| /* |
| * Module/boot parameters currently effect *all* instances of the |
| * card in the system. |
| */ |
| |
| /* |
| * Command line parameters are stored in a structure below. |
| * These are the index's into the structure for the various |
| * command line options. |
| */ |
| #define CFG_ADAPTER_ID 0 |
| #define CFG_MAX_SPEED 1 |
| #define CFG_DEV_MODE 2 |
| #define CFG_ADAPTER_MODE 3 |
| #define CFG_TAGS 4 |
| #define CFG_RESET_DELAY 5 |
| |
| #define CFG_NUM 6 /* number of configuration items */ |
| |
| |
| /* |
| * Value used to indicate that a command line override |
| * hasn't been used to modify the value. |
| */ |
| #define CFG_PARAM_UNSET -1 |
| |
| |
| /* |
| * Hold command line parameters. |
| */ |
| struct ParameterData { |
| int value; /* value of this setting */ |
| int min; /* minimum value */ |
| int max; /* maximum value */ |
| int def; /* default value */ |
| int safe; /* safe value */ |
| }; |
| static struct ParameterData __devinitdata cfg_data[] = { |
| { /* adapter id */ |
| CFG_PARAM_UNSET, |
| 0, |
| 15, |
| 7, |
| 7 |
| }, |
| { /* max speed */ |
| CFG_PARAM_UNSET, |
| 0, |
| 7, |
| 1, /* 13.3Mhz */ |
| 4, /* 6.7Hmz */ |
| }, |
| { /* dev mode */ |
| CFG_PARAM_UNSET, |
| 0, |
| 0x3f, |
| NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO | |
| NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING | |
| NTC_DO_SEND_START, |
| NTC_DO_PARITY_CHK | NTC_DO_SEND_START |
| }, |
| { /* adapter mode */ |
| CFG_PARAM_UNSET, |
| 0, |
| 0x2f, |
| #ifdef CONFIG_SCSI_MULTI_LUN |
| NAC_SCANLUN | |
| #endif |
| NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET |
| /*| NAC_ACTIVE_NEG*/, |
| NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08 |
| }, |
| { /* tags */ |
| CFG_PARAM_UNSET, |
| 0, |
| 5, |
| 3, /* 16 tags (??) */ |
| 2, |
| }, |
| { /* reset delay */ |
| CFG_PARAM_UNSET, |
| 0, |
| 180, |
| 1, /* 1 second */ |
| 10, /* 10 seconds */ |
| } |
| }; |
| |
| |
| /* |
| * Safe settings. If set to zero the BIOS/default values with |
| * command line overrides will be used. If set to 1 then safe and |
| * slow settings will be used. |
| */ |
| static int use_safe_settings = 0; |
| module_param_named(safe, use_safe_settings, bool, 0); |
| MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false"); |
| |
| |
| module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0); |
| MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)"); |
| |
| module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0); |
| MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz"); |
| |
| module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0); |
| MODULE_PARM_DESC(dev_mode, "Device mode."); |
| |
| module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0); |
| MODULE_PARM_DESC(adapter_mode, "Adapter mode."); |
| |
| module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0); |
| MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)"); |
| |
| module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0); |
| MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)"); |
| |
| |
| /** |
| * set_safe_settings - if the use_safe_settings option is set then |
| * set all values to the safe and slow values. |
| **/ |
| static void __devinit set_safe_settings(void) |
| { |
| if (use_safe_settings) |
| { |
| int i; |
| |
| dprintkl(KERN_INFO, "Using safe settings.\n"); |
| for (i = 0; i < CFG_NUM; i++) |
| { |
| cfg_data[i].value = cfg_data[i].safe; |
| } |
| } |
| } |
| |
| |
| /** |
| * fix_settings - reset any boot parameters which are out of range |
| * back to the default values. |
| **/ |
| static void __devinit fix_settings(void) |
| { |
| int i; |
| |
| dprintkdbg(DBG_1, |
| "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x " |
| "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n", |
| cfg_data[CFG_ADAPTER_ID].value, |
| cfg_data[CFG_MAX_SPEED].value, |
| cfg_data[CFG_DEV_MODE].value, |
| cfg_data[CFG_ADAPTER_MODE].value, |
| cfg_data[CFG_TAGS].value, |
| cfg_data[CFG_RESET_DELAY].value); |
| for (i = 0; i < CFG_NUM; i++) |
| { |
| if (cfg_data[i].value < cfg_data[i].min |
| || cfg_data[i].value > cfg_data[i].max) |
| cfg_data[i].value = cfg_data[i].def; |
| } |
| } |
| |
| |
| |
| /* |
| * Mapping from the eeprom delay index value (index into this array) |
| * to the number of actual seconds that the delay should be for. |
| */ |
| static char __devinitdata eeprom_index_to_delay_map[] = |
| { 1, 3, 5, 10, 16, 30, 60, 120 }; |
| |
| |
| /** |
| * eeprom_index_to_delay - Take the eeprom delay setting and convert it |
| * into a number of seconds. |
| * |
| * @eeprom: The eeprom structure in which we find the delay index to map. |
| **/ |
| static void __devinit eeprom_index_to_delay(struct NvRamType *eeprom) |
| { |
| eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time]; |
| } |
| |
| |
| /** |
| * delay_to_eeprom_index - Take a delay in seconds and return the |
| * closest eeprom index which will delay for at least that amount of |
| * seconds. |
| * |
| * @delay: The delay, in seconds, to find the eeprom index for. |
| **/ |
| static int __devinit delay_to_eeprom_index(int delay) |
| { |
| u8 idx = 0; |
| while (idx < 7 && eeprom_index_to_delay_map[idx] < delay) |
| idx++; |
| return idx; |
| } |
| |
| |
| /** |
| * eeprom_override - Override the eeprom settings, in the provided |
| * eeprom structure, with values that have been set on the command |
| * line. |
| * |
| * @eeprom: The eeprom data to override with command line options. |
| **/ |
| static void __devinit eeprom_override(struct NvRamType *eeprom) |
| { |
| u8 id; |
| |
| /* Adapter Settings */ |
| if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET) |
| eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value; |
| |
| if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET) |
| eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value; |
| |
| if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET) |
| eeprom->delay_time = delay_to_eeprom_index( |
| cfg_data[CFG_RESET_DELAY].value); |
| |
| if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET) |
| eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value; |
| |
| /* Device Settings */ |
| for (id = 0; id < DC395x_MAX_SCSI_ID; id++) { |
| if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET) |
| eeprom->target[id].cfg0 = |
| (u8)cfg_data[CFG_DEV_MODE].value; |
| |
| if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET) |
| eeprom->target[id].period = |
| (u8)cfg_data[CFG_MAX_SPEED].value; |
| |
| } |
| } |
| |
| |
| /*--------------------------------------------------------------------------- |
| ---------------------------------------------------------------------------*/ |
| |
| static unsigned int list_size(struct list_head *head) |
| { |
| unsigned int count = 0; |
| struct list_head *pos; |
| list_for_each(pos, head) |
| count++; |
| return count; |
| } |
| |
| |
| static struct DeviceCtlBlk *dcb_get_next(struct list_head *head, |
| struct DeviceCtlBlk *pos) |
| { |
| int use_next = 0; |
| struct DeviceCtlBlk* next = NULL; |
| struct DeviceCtlBlk* i; |
| |
| if (list_empty(head)) |
| return NULL; |
| |
| /* find supplied dcb and then select the next one */ |
| list_for_each_entry(i, head, list) |
| if (use_next) { |
| next = i; |
| break; |
| } else if (i == pos) { |
| use_next = 1; |
| } |
| /* if no next one take the head one (ie, wraparound) */ |
| if (!next) |
| list_for_each_entry(i, head, list) { |
| next = i; |
| break; |
| } |
| |
| return next; |
| } |
| |
| |
| static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) |
| { |
| if (srb->tag_number < 255) { |
| dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */ |
| srb->tag_number = 255; |
| } |
| } |
| |
| |
| /* Find cmd in SRB list */ |
| static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd, |
| struct list_head *head) |
| { |
| struct ScsiReqBlk *i; |
| list_for_each_entry(i, head, list) |
| if (i->cmd == cmd) |
| return i; |
| return NULL; |
| } |
| |
| |
| static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb) |
| { |
| struct list_head *head = &acb->srb_free_list; |
| struct ScsiReqBlk *srb = NULL; |
| |
| if (!list_empty(head)) { |
| srb = list_entry(head->next, struct ScsiReqBlk, list); |
| list_del(head->next); |
| dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb); |
| } |
| return srb; |
| } |
| |
| |
| static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) |
| { |
| dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb); |
| list_add_tail(&srb->list, &acb->srb_free_list); |
| } |
| |
| |
| static void srb_waiting_insert(struct DeviceCtlBlk *dcb, |
| struct ScsiReqBlk *srb) |
| { |
| dprintkdbg(DBG_0, "srb_waiting_insert: (0x%p) <%02i-%i> srb=%p\n", |
| srb->cmd, dcb->target_id, dcb->target_lun, srb); |
| list_add(&srb->list, &dcb->srb_waiting_list); |
| } |
| |
| |
| static void srb_waiting_append(struct DeviceCtlBlk *dcb, |
| struct ScsiReqBlk *srb) |
| { |
| dprintkdbg(DBG_0, "srb_waiting_append: (0x%p) <%02i-%i> srb=%p\n", |
| srb->cmd, dcb->target_id, dcb->target_lun, srb); |
| list_add_tail(&srb->list, &dcb->srb_waiting_list); |
| } |
| |
| |
| static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) |
| { |
| dprintkdbg(DBG_0, "srb_going_append: (0x%p) <%02i-%i> srb=%p\n", |
| srb->cmd, dcb->target_id, dcb->target_lun, srb); |
| list_add_tail(&srb->list, &dcb->srb_going_list); |
| } |
| |
| |
| static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) |
| { |
| struct ScsiReqBlk *i; |
| struct ScsiReqBlk *tmp; |
| dprintkdbg(DBG_0, "srb_going_remove: (0x%p) <%02i-%i> srb=%p\n", |
| srb->cmd, dcb->target_id, dcb->target_lun, srb); |
| |
| list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list) |
| if (i == srb) { |
| list_del(&srb->list); |
| break; |
| } |
| } |
| |
| |
| static void srb_waiting_remove(struct DeviceCtlBlk *dcb, |
| struct ScsiReqBlk *srb) |
| { |
| struct ScsiReqBlk *i; |
| struct ScsiReqBlk *tmp; |
| dprintkdbg(DBG_0, "srb_waiting_remove: (0x%p) <%02i-%i> srb=%p\n", |
| srb->cmd, dcb->target_id, dcb->target_lun, srb); |
| |
| list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list) |
| if (i == srb) { |
| list_del(&srb->list); |
| break; |
| } |
| } |
| |
| |
| static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb, |
| struct ScsiReqBlk *srb) |
| { |
| dprintkdbg(DBG_0, |
| "srb_going_to_waiting_move: (0x%p) <%02i-%i> srb=%p\n", |
| srb->cmd, dcb->target_id, dcb->target_lun, srb); |
| list_move(&srb->list, &dcb->srb_waiting_list); |
| } |
| |
| |
| static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb, |
| struct ScsiReqBlk *srb) |
| { |
| dprintkdbg(DBG_0, |
| "srb_waiting_to_going_move: (0x%p) <%02i-%i> srb=%p\n", |
| srb->cmd, dcb->target_id, dcb->target_lun, srb); |
| list_move(&srb->list, &dcb->srb_going_list); |
| } |
| |
| |
| /* Sets the timer to wake us up */ |
| static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to) |
| { |
| if (timer_pending(&acb->waiting_timer)) |
| return; |
| init_timer(&acb->waiting_timer); |
| acb->waiting_timer.function = waiting_timeout; |
| acb->waiting_timer.data = (unsigned long) acb; |
| if (time_before(jiffies + to, acb->scsi_host->last_reset - HZ / 2)) |
| acb->waiting_timer.expires = |
| acb->scsi_host->last_reset - HZ / 2 + 1; |
| else |
| acb->waiting_timer.expires = jiffies + to + 1; |
| add_timer(&acb->waiting_timer); |
| } |
| |
| |
| /* Send the next command from the waiting list to the bus */ |
| static void waiting_process_next(struct AdapterCtlBlk *acb) |
| { |
| struct DeviceCtlBlk *start = NULL; |
| struct DeviceCtlBlk *pos; |
| struct DeviceCtlBlk *dcb; |
| struct ScsiReqBlk *srb; |
| struct list_head *dcb_list_head = &acb->dcb_list; |
| |
| if (acb->active_dcb |
| || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) |
| return; |
| |
| if (timer_pending(&acb->waiting_timer)) |
| del_timer(&acb->waiting_timer); |
| |
| if (list_empty(dcb_list_head)) |
| return; |
| |
| /* |
| * Find the starting dcb. Need to find it again in the list |
| * since the list may have changed since we set the ptr to it |
| */ |
| list_for_each_entry(dcb, dcb_list_head, list) |
| if (dcb == acb->dcb_run_robin) { |
| start = dcb; |
| break; |
| } |
| if (!start) { |
| /* This can happen! */ |
| start = list_entry(dcb_list_head->next, typeof(*start), list); |
| acb->dcb_run_robin = start; |
| } |
| |
| |
| /* |
| * Loop over the dcb, but we start somewhere (potentially) in |
| * the middle of the loop so we need to manully do this. |
| */ |
| pos = start; |
| do { |
| struct list_head *waiting_list_head = &pos->srb_waiting_list; |
| |
| /* Make sure, the next another device gets scheduled ... */ |
| acb->dcb_run_robin = dcb_get_next(dcb_list_head, |
| acb->dcb_run_robin); |
| |
| if (list_empty(waiting_list_head) || |
| pos->max_command <= list_size(&pos->srb_going_list)) { |
| /* move to next dcb */ |
| pos = dcb_get_next(dcb_list_head, pos); |
| } else { |
| srb = list_entry(waiting_list_head->next, |
| struct ScsiReqBlk, list); |
| |
| /* Try to send to the bus */ |
| if (!start_scsi(acb, pos, srb)) |
| srb_waiting_to_going_move(pos, srb); |
| else |
| waiting_set_timer(acb, HZ/50); |
| break; |
| } |
| } while (pos != start); |
| } |
| |
| |
| /* Wake up waiting queue */ |
| static void waiting_timeout(unsigned long ptr) |
| { |
| unsigned long flags; |
| struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr; |
| dprintkdbg(DBG_1, |
| "waiting_timeout: Queue woken up by timer. acb=%p\n", acb); |
| DC395x_LOCK_IO(acb->scsi_host, flags); |
| waiting_process_next(acb); |
| DC395x_UNLOCK_IO(acb->scsi_host, flags); |
| } |
| |
| |
| /* Get the DCB for a given ID/LUN combination */ |
| static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun) |
| { |
| return acb->children[id][lun]; |
| } |
| |
| |
| /* Send SCSI Request Block (srb) to adapter (acb) */ |
| static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) |
| { |
| struct DeviceCtlBlk *dcb = srb->dcb; |
| |
| if (dcb->max_command <= list_size(&dcb->srb_going_list) || |
| acb->active_dcb || |
| (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) { |
| srb_waiting_append(dcb, srb); |
| waiting_process_next(acb); |
| return; |
| } |
| |
| if (!start_scsi(acb, dcb, srb)) |
| srb_going_append(dcb, srb); |
| else { |
| srb_waiting_insert(dcb, srb); |
| waiting_set_timer(acb, HZ / 50); |
| } |
| } |
| |
| /* Prepare SRB for being sent to Device DCB w/ command *cmd */ |
| static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, |
| struct ScsiReqBlk *srb) |
| { |
| int nseg; |
| enum dma_data_direction dir = cmd->sc_data_direction; |
| dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n", |
| cmd, dcb->target_id, dcb->target_lun); |
| |
| srb->dcb = dcb; |
| srb->cmd = cmd; |
| srb->sg_count = 0; |
| srb->total_xfer_length = 0; |
| srb->sg_bus_addr = 0; |
| srb->sg_index = 0; |
| srb->adapter_status = 0; |
| srb->target_status = 0; |
| srb->msg_count = 0; |
| srb->status = 0; |
| srb->flag = 0; |
| srb->state = 0; |
| srb->retry_count = 0; |
| srb->tag_number = TAG_NONE; |
| srb->scsi_phase = PH_BUS_FREE; /* initial phase */ |
| srb->end_message = 0; |
| |
| nseg = scsi_dma_map(cmd); |
| BUG_ON(nseg < 0); |
| |
| if (dir == PCI_DMA_NONE || !nseg) { |
| dprintkdbg(DBG_0, |
| "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n", |
| cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd), |
| srb->segment_x[0].address); |
| } else { |
| int i; |
| u32 reqlen = scsi_bufflen(cmd); |
| struct scatterlist *sg; |
| struct SGentry *sgp = srb->segment_x; |
| |
| srb->sg_count = nseg; |
| |
| dprintkdbg(DBG_0, |
| "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n", |
| reqlen, scsi_sglist(cmd), scsi_sg_count(cmd), |
| srb->sg_count); |
| |
| scsi_for_each_sg(cmd, sg, srb->sg_count, i) { |
| u32 busaddr = (u32)sg_dma_address(sg); |
| u32 seglen = (u32)sg->length; |
| sgp[i].address = busaddr; |
| sgp[i].length = seglen; |
| srb->total_xfer_length += seglen; |
| } |
| sgp += srb->sg_count - 1; |
| |
| /* |
| * adjust last page if too big as it is allocated |
| * on even page boundaries |
| */ |
| if (srb->total_xfer_length > reqlen) { |
| sgp->length -= (srb->total_xfer_length - reqlen); |
| srb->total_xfer_length = reqlen; |
| } |
| |
| /* Fixup for WIDE padding - make sure length is even */ |
| if (dcb->sync_period & WIDE_SYNC && |
| srb->total_xfer_length % 2) { |
| srb->total_xfer_length++; |
| sgp->length++; |
| } |
| |
| srb->sg_bus_addr = pci_map_single(dcb->acb->dev, |
| srb->segment_x, |
| SEGMENTX_LEN, |
| PCI_DMA_TODEVICE); |
| |
| dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n", |
| srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN); |
| } |
| |
| srb->request_length = srb->total_xfer_length; |
| } |
| |
| |
| /** |
| * dc395x_queue_command - queue scsi command passed from the mid |
| * layer, invoke 'done' on completion |
| * |
| * @cmd: pointer to scsi command object |
| * @done: function pointer to be invoked on completion |
| * |
| * Returns 1 if the adapter (host) is busy, else returns 0. One |
| * reason for an adapter to be busy is that the number |
| * of outstanding queued commands is already equal to |
| * struct Scsi_Host::can_queue . |
| * |
| * Required: if struct Scsi_Host::can_queue is ever non-zero |
| * then this function is required. |
| * |
| * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave") |
| * and is expected to be held on return. |
| * |
| **/ |
| static int dc395x_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
| { |
| struct DeviceCtlBlk *dcb; |
| struct ScsiReqBlk *srb; |
| struct AdapterCtlBlk *acb = |
| (struct AdapterCtlBlk *)cmd->device->host->hostdata; |
| dprintkdbg(DBG_0, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n", |
| cmd, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
| |
| /* Assume BAD_TARGET; will be cleared later */ |
| cmd->result = DID_BAD_TARGET << 16; |
| |
| /* ignore invalid targets */ |
| if (cmd->device->id >= acb->scsi_host->max_id || |
| cmd->device->lun >= acb->scsi_host->max_lun || |
| cmd->device->lun >31) { |
| goto complete; |
| } |
| |
| /* does the specified lun on the specified device exist */ |
| if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) { |
| dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n", |
| cmd->device->id, cmd->device->lun); |
| goto complete; |
| } |
| |
| /* do we have a DCB for the device */ |
| dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); |
| if (!dcb) { |
| /* should never happen */ |
| dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>", |
| cmd->device->id, cmd->device->lun); |
| goto complete; |
| } |
| |
| /* set callback and clear result in the command */ |
| cmd->scsi_done = done; |
| cmd->result = 0; |
| |
| srb = srb_get_free(acb); |
| if (!srb) |
| { |
| /* |
| * Return 1 since we are unable to queue this command at this |
| * point in time. |
| */ |
| dprintkdbg(DBG_0, "queue_command: No free srb's\n"); |
| return 1; |
| } |
| |
| build_srb(cmd, dcb, srb); |
| |
| if (!list_empty(&dcb->srb_waiting_list)) { |
| /* append to waiting queue */ |
| srb_waiting_append(dcb, srb); |
| waiting_process_next(acb); |
| } else { |
| /* process immediately */ |
| send_srb(acb, srb); |
| } |
| dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd); |
| return 0; |
| |
| complete: |
| /* |
| * Complete the command immediatey, and then return 0 to |
| * indicate that we have handled the command. This is usually |
| * done when the commad is for things like non existent |
| * devices. |
| */ |
| done(cmd); |
| return 0; |
| } |
| |
| static DEF_SCSI_QCMD(dc395x_queue_command) |
| |
| /* |
| * Return the disk geometry for the given SCSI device. |
| */ |
| static int dc395x_bios_param(struct scsi_device *sdev, |
| struct block_device *bdev, sector_t capacity, int *info) |
| { |
| #ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP |
| int heads, sectors, cylinders; |
| struct AdapterCtlBlk *acb; |
| int size = capacity; |
| |
| dprintkdbg(DBG_0, "dc395x_bios_param..............\n"); |
| acb = (struct AdapterCtlBlk *)sdev->host->hostdata; |
| heads = 64; |
| sectors = 32; |
| cylinders = size / (heads * sectors); |
| |
| if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) { |
| heads = 255; |
| sectors = 63; |
| cylinders = size / (heads * sectors); |
| } |
| geom[0] = heads; |
| geom[1] = sectors; |
| geom[2] = cylinders; |
| return 0; |
| #else |
| return scsicam_bios_param(bdev, capacity, info); |
| #endif |
| } |
| |
| |
| static void dump_register_info(struct AdapterCtlBlk *acb, |
| struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) |
| { |
| u16 pstat; |
| struct pci_dev *dev = acb->dev; |
| pci_read_config_word(dev, PCI_STATUS, &pstat); |
| if (!dcb) |
| dcb = acb->active_dcb; |
| if (!srb && dcb) |
| srb = dcb->active_srb; |
| if (srb) { |
| if (!srb->cmd) |
| dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n", |
| srb, srb->cmd); |
| else |
| dprintkl(KERN_INFO, "dump: srb=%p cmd=%p " |
| "cmnd=0x%02x <%02i-%i>\n", |
| srb, srb->cmd, |
| srb->cmd->cmnd[0], srb->cmd->device->id, |
| srb->cmd->device->lun); |
| printk(" sglist=%p cnt=%i idx=%i len=%zu\n", |
| srb->segment_x, srb->sg_count, srb->sg_index, |
| srb->total_xfer_length); |
| printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n", |
| srb->state, srb->status, srb->scsi_phase, |
| (acb->active_dcb) ? "" : "not"); |
| } |
| dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x " |
| "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x " |
| "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x " |
| "config2=0x%02x cmd=0x%02x selto=0x%02x}\n", |
| DC395x_read16(acb, TRM_S1040_SCSI_STATUS), |
| DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), |
| DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL), |
| DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS), |
| DC395x_read8(acb, TRM_S1040_SCSI_SYNC), |
| DC395x_read8(acb, TRM_S1040_SCSI_TARGETID), |
| DC395x_read8(acb, TRM_S1040_SCSI_IDMSG), |
| DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), |
| DC395x_read8(acb, TRM_S1040_SCSI_INTEN), |
| DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0), |
| DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2), |
| DC395x_read8(acb, TRM_S1040_SCSI_COMMAND), |
| DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT)); |
| dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x " |
| "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x " |
| "ctctr=0x%08x addr=0x%08x:0x%08x}\n", |
| DC395x_read16(acb, TRM_S1040_DMA_COMMAND), |
| DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), |
| DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), |
| DC395x_read8(acb, TRM_S1040_DMA_STATUS), |
| DC395x_read8(acb, TRM_S1040_DMA_INTEN), |
| DC395x_read16(acb, TRM_S1040_DMA_CONFIG), |
| DC395x_read32(acb, TRM_S1040_DMA_XCNT), |
| DC395x_read32(acb, TRM_S1040_DMA_CXCNT), |
| DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR), |
| DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR)); |
| dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} " |
| "pci{status=0x%04x}\n", |
| DC395x_read8(acb, TRM_S1040_GEN_CONTROL), |
| DC395x_read8(acb, TRM_S1040_GEN_STATUS), |
| DC395x_read8(acb, TRM_S1040_GEN_TIMER), |
| pstat); |
| } |
| |
| |
| static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt) |
| { |
| #if debug_enabled(DBG_FIFO) |
| u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); |
| u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); |
| if (!(fifocnt & 0x40)) |
| dprintkdbg(DBG_FIFO, |
| "clear_fifo: (%i bytes) on phase %02x in %s\n", |
| fifocnt & 0x3f, lines, txt); |
| #endif |
| DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO); |
| } |
| |
| |
| static void reset_dev_param(struct AdapterCtlBlk *acb) |
| { |
| struct DeviceCtlBlk *dcb; |
| struct NvRamType *eeprom = &acb->eeprom; |
| dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb); |
| |
| list_for_each_entry(dcb, &acb->dcb_list, list) { |
| u8 period_index; |
| |
| dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE); |
| dcb->sync_period = 0; |
| dcb->sync_offset = 0; |
| |
| dcb->dev_mode = eeprom->target[dcb->target_id].cfg0; |
| period_index = eeprom->target[dcb->target_id].period & 0x07; |
| dcb->min_nego_period = clock_period[period_index]; |
| if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO) |
| || !(acb->config & HCC_WIDE_CARD)) |
| dcb->sync_mode &= ~WIDE_NEGO_ENABLE; |
| } |
| } |
| |
| |
| /* |
| * perform a hard reset on the SCSI bus |
| * @cmd - some command for this host (for fetching hooks) |
| * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). |
| */ |
| static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd) |
| { |
| struct AdapterCtlBlk *acb = |
| (struct AdapterCtlBlk *)cmd->device->host->hostdata; |
| dprintkl(KERN_INFO, |
| "eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n", |
| cmd, cmd->device->id, cmd->device->lun, cmd); |
| |
| if (timer_pending(&acb->waiting_timer)) |
| del_timer(&acb->waiting_timer); |
| |
| /* |
| * disable interrupt |
| */ |
| DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); |
| DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); |
| DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); |
| DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); |
| |
| reset_scsi_bus(acb); |
| udelay(500); |
| |
| /* We may be in serious trouble. Wait some seconds */ |
| acb->scsi_host->last_reset = |
| jiffies + 3 * HZ / 2 + |
| HZ * acb->eeprom.delay_time; |
| |
| /* |
| * re-enable interrupt |
| */ |
| /* Clear SCSI FIFO */ |
| DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); |
| clear_fifo(acb, "eh_bus_reset"); |
| /* Delete pending IRQ */ |
| DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); |
| set_basic_config(acb); |
| |
| reset_dev_param(acb); |
| doing_srb_done(acb, DID_RESET, cmd, 0); |
| acb->active_dcb = NULL; |
| acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */ |
| waiting_process_next(acb); |
| |
| return SUCCESS; |
| } |
| |
| static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd) |
| { |
| int rc; |
| |
| spin_lock_irq(cmd->device->host->host_lock); |
| rc = __dc395x_eh_bus_reset(cmd); |
| spin_unlock_irq(cmd->device->host->host_lock); |
| |
| return rc; |
| } |
| |
| /* |
| * abort an errant SCSI command |
| * @cmd - command to be aborted |
| * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). |
| */ |
| static int dc395x_eh_abort(struct scsi_cmnd *cmd) |
| { |
| /* |
| * Look into our command queues: If it has not been sent already, |
| * we remove it and return success. Otherwise fail. |
| */ |
| struct AdapterCtlBlk *acb = |
| (struct AdapterCtlBlk *)cmd->device->host->hostdata; |
| struct DeviceCtlBlk *dcb; |
| struct ScsiReqBlk *srb; |
| dprintkl(KERN_INFO, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n", |
| cmd, cmd->device->id, cmd->device->lun, cmd); |
| |
| dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); |
| if (!dcb) { |
| dprintkl(KERN_DEBUG, "eh_abort: No such device\n"); |
| return FAILED; |
| } |
| |
| srb = find_cmd(cmd, &dcb->srb_waiting_list); |
| if (srb) { |
| srb_waiting_remove(dcb, srb); |
| pci_unmap_srb_sense(acb, srb); |
| pci_unmap_srb(acb, srb); |
| free_tag(dcb, srb); |
| srb_free_insert(acb, srb); |
| dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n"); |
| cmd->result = DID_ABORT << 16; |
| return SUCCESS; |
| } |
| srb = find_cmd(cmd, &dcb->srb_going_list); |
| if (srb) { |
| dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n"); |
| /* XXX: Should abort the command here */ |
| } else { |
| dprintkl(KERN_DEBUG, "eh_abort: Command not found\n"); |
| } |
| return FAILED; |
| } |
| |
| |
| /* SDTR */ |
| static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, |
| struct ScsiReqBlk *srb) |
| { |
| u8 *ptr = srb->msgout_buf + srb->msg_count; |
| if (srb->msg_count > 1) { |
| dprintkl(KERN_INFO, |
| "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n", |
| srb->msg_count, srb->msgout_buf[0], |
| srb->msgout_buf[1]); |
| return; |
| } |
| if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) { |
| dcb->sync_offset = 0; |
| dcb->min_nego_period = 200 >> 2; |
| } else if (dcb->sync_offset == 0) |
| dcb->sync_offset = SYNC_NEGO_OFFSET; |
| |
| *ptr++ = MSG_EXTENDED; /* (01h) */ |
| *ptr++ = 3; /* length */ |
| *ptr++ = EXTENDED_SDTR; /* (01h) */ |
| *ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */ |
| *ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */ |
| srb->msg_count += 5; |
| srb->state |= SRB_DO_SYNC_NEGO; |
| } |
| |
| |
| /* WDTR */ |
| static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, |
| struct ScsiReqBlk *srb) |
| { |
| u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) & |
| (acb->config & HCC_WIDE_CARD)) ? 1 : 0; |
| u8 *ptr = srb->msgout_buf + srb->msg_count; |
| if (srb->msg_count > 1) { |
| dprintkl(KERN_INFO, |
| "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n", |
| srb->msg_count, srb->msgout_buf[0], |
| srb->msgout_buf[1]); |
| return; |
| } |
| *ptr++ = MSG_EXTENDED; /* (01h) */ |
| *ptr++ = 2; /* length */ |
| *ptr++ = EXTENDED_WDTR; /* (03h) */ |
| *ptr++ = wide; |
| srb->msg_count += 4; |
| srb->state |= SRB_DO_WIDE_NEGO; |
| } |
| |
| |
| #if 0 |
| /* Timer to work around chip flaw: When selecting and the bus is |
| * busy, we sometimes miss a Selection timeout IRQ */ |
| void selection_timeout_missed(unsigned long ptr); |
| /* Sets the timer to wake us up */ |
| static void selto_timer(struct AdapterCtlBlk *acb) |
| { |
| if (timer_pending(&acb->selto_timer)) |
| return; |
| acb->selto_timer.function = selection_timeout_missed; |
| acb->selto_timer.data = (unsigned long) acb; |
| if (time_before |
| (jiffies + HZ, acb->scsi_host->last_reset + HZ / 2)) |
| acb->selto_timer.expires = |
| acb->scsi_host->last_reset + HZ / 2 + 1; |
| else |
| acb->selto_timer.expires = jiffies + HZ + 1; |
| add_timer(&acb->selto_timer); |
| } |
| |
| |
| void selection_timeout_missed(unsigned long ptr) |
| { |
| unsigned long flags; |
| struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr; |
| struct ScsiReqBlk *srb; |
| dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n"); |
| if (!acb->active_dcb || !acb->active_dcb->active_srb) { |
| dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n"); |
| return; |
| } |
| DC395x_LOCK_IO(acb->scsi_host, flags); |
| srb = acb->active_dcb->active_srb; |
| disconnect(acb); |
| DC395x_UNLOCK_IO(acb->scsi_host, flags); |
| } |
| #endif |
| |
| |
| static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb, |
| struct ScsiReqBlk* srb) |
| { |
| u16 s_stat2, return_code; |
| u8 s_stat, scsicommand, i, identify_message; |
| u8 *ptr; |
| dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n", |
| dcb->target_id, dcb->target_lun, srb); |
| |
| srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */ |
| |
| s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); |
| s_stat2 = 0; |
| s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); |
| #if 1 |
| if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) { |
| dprintkdbg(DBG_KG, "start_scsi: (0x%p) BUSY %02x %04x\n", |
| s_stat, s_stat2); |
| /* |
| * Try anyway? |
| * |
| * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection |
| * Timeout, a Disconnect or a Reselection IRQ, so we would be screwed! |
| * (This is likely to be a bug in the hardware. Obviously, most people |
| * only have one initiator per SCSI bus.) |
| * Instead let this fail and have the timer make sure the command is |
| * tried again after a short time |
| */ |
| /*selto_timer (acb); */ |
| return 1; |
| } |
| #endif |
| if (acb->active_dcb) { |
| dprintkl(KERN_DEBUG, "start_scsi: (0x%p) Attempt to start a" |
| "command while another command (0x%p) is active.", |
| srb->cmd, |
| acb->active_dcb->active_srb ? |
| acb->active_dcb->active_srb->cmd : 0); |
| return 1; |
| } |
| if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { |
| dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd); |
| return 1; |
| } |
| /* Allow starting of SCSI commands half a second before we allow the mid-level |
| * to queue them again after a reset */ |
| if (time_before(jiffies, acb->scsi_host->last_reset - HZ / 2)) { |
| dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n"); |
| return 1; |
| } |
| |
| /* Flush FIFO */ |
| clear_fifo(acb, "start_scsi"); |
| DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); |
| DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); |
| DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); |
| DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); |
| srb->scsi_phase = PH_BUS_FREE; /* initial phase */ |
| |
| identify_message = dcb->identify_msg; |
| /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */ |
| /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */ |
| if (srb->flag & AUTO_REQSENSE) |
| identify_message &= 0xBF; |
| |
| if (((srb->cmd->cmnd[0] == INQUIRY) |
| || (srb->cmd->cmnd[0] == REQUEST_SENSE) |
| || (srb->flag & AUTO_REQSENSE)) |
| && (((dcb->sync_mode & WIDE_NEGO_ENABLE) |
| && !(dcb->sync_mode & WIDE_NEGO_DONE)) |
| || ((dcb->sync_mode & SYNC_NEGO_ENABLE) |
| && !(dcb->sync_mode & SYNC_NEGO_DONE))) |
| && (dcb->target_lun == 0)) { |
| srb->msgout_buf[0] = identify_message; |
| srb->msg_count = 1; |
| scsicommand = SCMD_SEL_ATNSTOP; |
| srb->state = SRB_MSGOUT; |
| #ifndef SYNC_FIRST |
| if (dcb->sync_mode & WIDE_NEGO_ENABLE |
| && dcb->inquiry7 & SCSI_INQ_WBUS16) { |
| build_wdtr(acb, dcb, srb); |
| goto no_cmd; |
| } |
| #endif |
| if (dcb->sync_mode & SYNC_NEGO_ENABLE |
| && dcb->inquiry7 & SCSI_INQ_SYNC) { |
| build_sdtr(acb, dcb, srb); |
| goto no_cmd; |
| } |
| if (dcb->sync_mode & WIDE_NEGO_ENABLE |
| && dcb->inquiry7 & SCSI_INQ_WBUS16) { |
| build_wdtr(acb, dcb, srb); |
| goto no_cmd; |
| } |
| srb->msg_count = 0; |
| } |
| /* Send identify message */ |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message); |
| |
| scsicommand = SCMD_SEL_ATN; |
| srb->state = SRB_START_; |
| #ifndef DC395x_NO_TAGQ |
| if ((dcb->sync_mode & EN_TAG_QUEUEING) |
| && (identify_message & 0xC0)) { |
| /* Send Tag message */ |
| u32 tag_mask = 1; |
| u8 tag_number = 0; |
| while (tag_mask & dcb->tag_mask |
| && tag_number < dcb->max_command) { |
| tag_mask = tag_mask << 1; |
| tag_number++; |
| } |
| if (tag_number >= dcb->max_command) { |
| dprintkl(KERN_WARNING, "start_scsi: (0x%p) " |
| "Out of tags target=<%02i-%i>)\n", |
| srb->cmd, srb->cmd->device->id, |
| srb->cmd->device->lun); |
| srb->state = SRB_READY; |
| DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, |
| DO_HWRESELECT); |
| return 1; |
| } |
| /* Send Tag id */ |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG); |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number); |
| dcb->tag_mask |= tag_mask; |
| srb->tag_number = tag_number; |
| scsicommand = SCMD_SEL_ATN3; |
| srb->state = SRB_START_; |
| } |
| #endif |
| /*polling:*/ |
| /* Send CDB ..command block ......... */ |
| dprintkdbg(DBG_KG, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n", |
| srb->cmd, srb->cmd->device->id, srb->cmd->device->lun, |
| srb->cmd->cmnd[0], srb->tag_number); |
| if (srb->flag & AUTO_REQSENSE) { |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE); |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); |
| } else { |
| ptr = (u8 *)srb->cmd->cmnd; |
| for (i = 0; i < srb->cmd->cmd_len; i++) |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); |
| } |
| no_cmd: |
| DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, |
| DO_HWRESELECT | DO_DATALATCH); |
| if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { |
| /* |
| * If start_scsi return 1: |
| * we caught an interrupt (must be reset or reselection ... ) |
| * : Let's process it first! |
| */ |
| dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n", |
| srb->cmd, dcb->target_id, dcb->target_lun); |
| srb->state = SRB_READY; |
| free_tag(dcb, srb); |
| srb->msg_count = 0; |
| return_code = 1; |
| /* This IRQ should NOT get lost, as we did not acknowledge it */ |
| } else { |
| /* |
| * If start_scsi returns 0: |
| * we know that the SCSI processor is free |
| */ |
| srb->scsi_phase = PH_BUS_FREE; /* initial phase */ |
| dcb->active_srb = srb; |
| acb->active_dcb = dcb; |
| return_code = 0; |
| /* it's important for atn stop */ |
| DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, |
| DO_DATALATCH | DO_HWRESELECT); |
| /* SCSI command */ |
| DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand); |
| } |
| return return_code; |
| } |
| |
| |
| #define DC395x_ENABLE_MSGOUT \ |
| DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \ |
| srb->state |= SRB_MSGOUT |
| |
| |
| /* abort command */ |
| static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, |
| struct ScsiReqBlk *srb) |
| { |
| srb->msgout_buf[0] = ABORT; |
| srb->msg_count = 1; |
| DC395x_ENABLE_MSGOUT; |
| srb->state &= ~SRB_MSGIN; |
| srb->state |= SRB_MSGOUT; |
| } |
| |
| |
| /** |
| * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to |
| * have been triggered for this card. |
| * |
| * @acb: a pointer to the adpter control block |
| * @scsi_status: the status return when we checked the card |
| **/ |
| static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb, |
| u16 scsi_status) |
| { |
| struct DeviceCtlBlk *dcb; |
| struct ScsiReqBlk *srb; |
| u16 phase; |
| u8 scsi_intstatus; |
| unsigned long flags; |
| void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *, |
| u16 *); |
| |
| DC395x_LOCK_IO(acb->scsi_host, flags); |
| |
| /* This acknowledges the IRQ */ |
| scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); |
| if ((scsi_status & 0x2007) == 0x2002) |
| dprintkl(KERN_DEBUG, |
| "COP after COP completed? %04x\n", scsi_status); |
| if (debug_enabled(DBG_KG)) { |
| if (scsi_intstatus & INT_SELTIMEOUT) |
| dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n"); |
| } |
| /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */ |
| |
| if (timer_pending(&acb->selto_timer)) |
| del_timer(&acb->selto_timer); |
| |
| if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) { |
| disconnect(acb); /* bus free interrupt */ |
| goto out_unlock; |
| } |
| if (scsi_intstatus & INT_RESELECTED) { |
| reselect(acb); |
| goto out_unlock; |
| } |
| if (scsi_intstatus & INT_SELECT) { |
| dprintkl(KERN_INFO, "Host does not support target mode!\n"); |
| goto out_unlock; |
| } |
| if (scsi_intstatus & INT_SCSIRESET) { |
| scsi_reset_detect(acb); |
| goto out_unlock; |
| } |
| if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) { |
| dcb = acb->active_dcb; |
| if (!dcb) { |
| dprintkl(KERN_DEBUG, |
| "Oops: BusService (%04x %02x) w/o ActiveDCB!\n", |
| scsi_status, scsi_intstatus); |
| goto out_unlock; |
| } |
| srb = dcb->active_srb; |
| if (dcb->flag & ABORT_DEV_) { |
| dprintkdbg(DBG_0, "MsgOut Abort Device.....\n"); |
| enable_msgout_abort(acb, srb); |
| } |
| |
| /* software sequential machine */ |
| phase = (u16)srb->scsi_phase; |
| |
| /* |
| * 62037 or 62137 |
| * call dc395x_scsi_phase0[]... "phase entry" |
| * handle every phase before start transfer |
| */ |
| /* data_out_phase0, phase:0 */ |
| /* data_in_phase0, phase:1 */ |
| /* command_phase0, phase:2 */ |
| /* status_phase0, phase:3 */ |
| /* nop0, phase:4 PH_BUS_FREE .. initial phase */ |
| /* nop0, phase:5 PH_BUS_FREE .. initial phase */ |
| /* msgout_phase0, phase:6 */ |
| /* msgin_phase0, phase:7 */ |
| dc395x_statev = dc395x_scsi_phase0[phase]; |
| dc395x_statev(acb, srb, &scsi_status); |
| |
| /* |
| * if there were any exception occurred scsi_status |
| * will be modify to bus free phase new scsi_status |
| * transfer out from ... previous dc395x_statev |
| */ |
| srb->scsi_phase = scsi_status & PHASEMASK; |
| phase = (u16)scsi_status & PHASEMASK; |
| |
| /* |
| * call dc395x_scsi_phase1[]... "phase entry" handle |
| * every phase to do transfer |
| */ |
| /* data_out_phase1, phase:0 */ |
| /* data_in_phase1, phase:1 */ |
| /* command_phase1, phase:2 */ |
| /* status_phase1, phase:3 */ |
| /* nop1, phase:4 PH_BUS_FREE .. initial phase */ |
| /* nop1, phase:5 PH_BUS_FREE .. initial phase */ |
| /* msgout_phase1, phase:6 */ |
| /* msgin_phase1, phase:7 */ |
| dc395x_statev = dc395x_scsi_phase1[phase]; |
| dc395x_statev(acb, srb, &scsi_status); |
| } |
| out_unlock: |
| DC395x_UNLOCK_IO(acb->scsi_host, flags); |
| } |
| |
| |
| static irqreturn_t dc395x_interrupt(int irq, void *dev_id) |
| { |
| struct AdapterCtlBlk *acb = dev_id; |
| u16 scsi_status; |
| u8 dma_status; |
| irqreturn_t handled = IRQ_NONE; |
| |
| /* |
| * Check for pending interrupt |
| */ |
| scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); |
| dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); |
| if (scsi_status & SCSIINTERRUPT) { |
| /* interrupt pending - let's process it! */ |
| dc395x_handle_interrupt(acb, scsi_status); |
| handled = IRQ_HANDLED; |
| } |
| else if (dma_status & 0x20) { |
| /* Error from the DMA engine */ |
| dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status); |
| #if 0 |
| dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n"); |
| if (acb->active_dcb) { |
| acb->active_dcb-> flag |= ABORT_DEV_; |
| if (acb->active_dcb->active_srb) |
| enable_msgout_abort(acb, acb->active_dcb->active_srb); |
| } |
| DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO); |
| #else |
| dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n"); |
| acb = NULL; |
| #endif |
| handled = IRQ_HANDLED; |
| } |
| |
| return handled; |
| } |
| |
| |
| static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status) |
| { |
| dprintkdbg(DBG_0, "msgout_phase0: (0x%p)\n", srb->cmd); |
| if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT)) |
| *pscsi_status = PH_BUS_FREE; /*.. initial phase */ |
| |
| DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ |
| srb->state &= ~SRB_MSGOUT; |
| } |
| |
| |
| static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status) |
| { |
| u16 i; |
| u8 *ptr; |
| dprintkdbg(DBG_0, "msgout_phase1: (0x%p)\n", srb->cmd); |
| |
| clear_fifo(acb, "msgout_phase1"); |
| if (!(srb->state & SRB_MSGOUT)) { |
| srb->state |= SRB_MSGOUT; |
| dprintkl(KERN_DEBUG, |
| "msgout_phase1: (0x%p) Phase unexpected\n", |
| srb->cmd); /* So what ? */ |
| } |
| if (!srb->msg_count) { |
| dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n", |
| srb->cmd); |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP); |
| DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ |
| DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); |
| return; |
| } |
| ptr = (u8 *)srb->msgout_buf; |
| for (i = 0; i < srb->msg_count; i++) |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); |
| srb->msg_count = 0; |
| if (srb->msgout_buf[0] == MSG_ABORT) |
| srb->state = SRB_ABORT_SENT; |
| |
| DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); |
| } |
| |
| |
| static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status) |
| { |
| dprintkdbg(DBG_0, "command_phase0: (0x%p)\n", srb->cmd); |
| DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); |
| } |
| |
| |
| static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status) |
| { |
| struct DeviceCtlBlk *dcb; |
| u8 *ptr; |
| u16 i; |
| dprintkdbg(DBG_0, "command_phase1: (0x%p)\n", srb->cmd); |
| |
| clear_fifo(acb, "command_phase1"); |
| DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN); |
| if (!(srb->flag & AUTO_REQSENSE)) { |
| ptr = (u8 *)srb->cmd->cmnd; |
| for (i = 0; i < srb->cmd->cmd_len; i++) { |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr); |
| ptr++; |
| } |
| } else { |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); |
| dcb = acb->active_dcb; |
| /* target id */ |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE); |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); |
| } |
| srb->state |= SRB_COMMAND; |
| /* it's important for atn stop */ |
| DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); |
| /* SCSI command */ |
| DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); |
| } |
| |
| |
| /* |
| * Verify that the remaining space in the hw sg lists is the same as |
| * the count of remaining bytes in srb->total_xfer_length |
| */ |
| static void sg_verify_length(struct ScsiReqBlk *srb) |
| { |
| if (debug_enabled(DBG_SG)) { |
| unsigned len = 0; |
| unsigned idx = srb->sg_index; |
| struct SGentry *psge = srb->segment_x + idx; |
| for (; idx < srb->sg_count; psge++, idx++) |
| len += psge->length; |
| if (len != srb->total_xfer_length) |
| dprintkdbg(DBG_SG, |
| "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n", |
| srb->total_xfer_length, len); |
| } |
| } |
| |
| |
| /* |
| * Compute the next Scatter Gather list index and adjust its length |
| * and address if necessary |
| */ |
| static void sg_update_list(struct ScsiReqBlk *srb, u32 left) |
| { |
| u8 idx; |
| u32 xferred = srb->total_xfer_length - left; /* bytes transferred */ |
| struct SGentry *psge = srb->segment_x + srb->sg_index; |
| |
| dprintkdbg(DBG_0, |
| "sg_update_list: Transferred %i of %i bytes, %i remain\n", |
| xferred, srb->total_xfer_length, left); |
| if (xferred == 0) { |
| /* nothing to update since we did not transfer any data */ |
| return; |
| } |
| |
| sg_verify_length(srb); |
| srb->total_xfer_length = left; /* update remaining count */ |
| for (idx = srb->sg_index; idx < srb->sg_count; idx++) { |
| if (xferred >= psge->length) { |
| /* Complete SG entries done */ |
| xferred -= psge->length; |
| } else { |
| /* Partial SG entry done */ |
| psge->length -= xferred; |
| psge->address += xferred; |
| srb->sg_index = idx; |
| pci_dma_sync_single_for_device(srb->dcb-> |
| acb->dev, |
| srb->sg_bus_addr, |
| SEGMENTX_LEN, |
| PCI_DMA_TODEVICE); |
| break; |
| } |
| psge++; |
| } |
| sg_verify_length(srb); |
| } |
| |
| |
| /* |
| * We have transferred a single byte (PIO mode?) and need to update |
| * the count of bytes remaining (total_xfer_length) and update the sg |
| * entry to either point to next byte in the current sg entry, or of |
| * already at the end to point to the start of the next sg entry |
| */ |
| static void sg_subtract_one(struct ScsiReqBlk *srb) |
| { |
| sg_update_list(srb, srb->total_xfer_length - 1); |
| } |
| |
| |
| /* |
| * cleanup_after_transfer |
| * |
| * Makes sure, DMA and SCSI engine are empty, after the transfer has finished |
| * KG: Currently called from StatusPhase1 () |
| * Should probably also be called from other places |
| * Best might be to call it in DataXXPhase0, if new phase will differ |
| */ |
| static void cleanup_after_transfer(struct AdapterCtlBlk *acb, |
| struct ScsiReqBlk *srb) |
| { |
| /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */ |
| if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */ |
| if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) |
| clear_fifo(acb, "cleanup/in"); |
| if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) |
| DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); |
| } else { /* write */ |
| if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) |
| DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); |
| if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) |
| clear_fifo(acb, "cleanup/out"); |
| } |
| DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); |
| } |
| |
| |
| /* |
| * Those no of bytes will be transferred w/ PIO through the SCSI FIFO |
| * Seems to be needed for unknown reasons; could be a hardware bug :-( |
| */ |
| #define DC395x_LASTPIO 4 |
| |
| |
| static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status) |
| { |
| struct DeviceCtlBlk *dcb = srb->dcb; |
| u16 scsi_status = *pscsi_status; |
| u32 d_left_counter = 0; |
| dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n", |
| srb->cmd, srb->cmd->device->id, srb->cmd->device->lun); |
| |
| /* |
| * KG: We need to drain the buffers before we draw any conclusions! |
| * This means telling the DMA to push the rest into SCSI, telling |
| * SCSI to push the rest to the bus. |
| * However, the device might have been the one to stop us (phase |
| * change), and the data in transit just needs to be accounted so |
| * it can be retransmitted.) |
| */ |
| /* |
| * KG: Stop DMA engine pushing more data into the SCSI FIFO |
| * If we need more data, the DMA SG list will be freshly set up, anyway |
| */ |
| dprintkdbg(DBG_PIO, "data_out_phase0: " |
| "DMA{fifocnt=0x%02x fifostat=0x%02x} " |
| "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n", |
| DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), |
| DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), |
| DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), |
| DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status, |
| srb->total_xfer_length); |
| DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO); |
| |
| if (!(srb->state & SRB_XFERPAD)) { |
| if (scsi_status & PARITYERROR) |
| srb->status |= PARITY_ERROR; |
| |
| /* |
| * KG: Right, we can't just rely on the SCSI_COUNTER, because this |
| * is the no of bytes it got from the DMA engine not the no it |
| * transferred successfully to the device. (And the difference could |
| * be as much as the FIFO size, I guess ...) |
| */ |
| if (!(scsi_status & SCSIXFERDONE)) { |
| /* |
| * when data transfer from DMA FIFO to SCSI FIFO |
| * if there was some data left in SCSI FIFO |
| */ |
| d_left_counter = |
| (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & |
| 0x1F); |
| if (dcb->sync_period & WIDE_SYNC) |
| d_left_counter <<= 1; |
| |
| dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n" |
| "SCSI{fifocnt=0x%02x cnt=0x%08x} " |
| "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n", |
| DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), |
| (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", |
| DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), |
| DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), |
| DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), |
| DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), |
| DC395x_read32(acb, TRM_S1040_DMA_CXCNT)); |
| } |
| /* |
| * calculate all the residue data that not yet tranfered |
| * SCSI transfer counter + left in SCSI FIFO data |
| * |
| * .....TRM_S1040_SCSI_COUNTER (24bits) |
| * The counter always decrement by one for every SCSI byte transfer. |
| * .....TRM_S1040_SCSI_FIFOCNT ( 5bits) |
| * The counter is SCSI FIFO offset counter (in units of bytes or! words) |
| */ |
| if (srb->total_xfer_length > DC395x_LASTPIO) |
| d_left_counter += |
| DC395x_read32(acb, TRM_S1040_SCSI_COUNTER); |
| |
| /* Is this a good idea? */ |
| /*clear_fifo(acb, "DOP1"); */ |
| /* KG: What is this supposed to be useful for? WIDE padding stuff? */ |
| if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC |
| && scsi_bufflen(srb->cmd) % 2) { |
| d_left_counter = 0; |
| dprintkl(KERN_INFO, |
| "data_out_phase0: Discard 1 byte (0x%02x)\n", |
| scsi_status); |
| } |
| /* |
| * KG: Oops again. Same thinko as above: The SCSI might have been |
| * faster than the DMA engine, so that it ran out of data. |
| * In that case, we have to do just nothing! |
| * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or? |
| */ |
| /* |
| * KG: This is nonsense: We have been WRITING data to the bus |
| * If the SCSI engine has no bytes left, how should the DMA engine? |
| */ |
| if (d_left_counter == 0) { |
| srb->total_xfer_length = 0; |
| } else { |
| /* |
| * if transfer not yet complete |
| * there were some data residue in SCSI FIFO or |
| * SCSI transfer counter not empty |
| */ |
| long oldxferred = |
| srb->total_xfer_length - d_left_counter; |
| const int diff = |
| (dcb->sync_period & WIDE_SYNC) ? 2 : 1; |
| sg_update_list(srb, d_left_counter); |
| /* KG: Most ugly hack! Apparently, this works around a chip bug */ |
| if ((srb->segment_x[srb->sg_index].length == |
| diff && scsi_sg_count(srb->cmd)) |
| || ((oldxferred & ~PAGE_MASK) == |
| (PAGE_SIZE - diff)) |
| ) { |
| dprintkl(KERN_INFO, "data_out_phase0: " |
| "Work around chip bug (%i)?\n", diff); |
| d_left_counter = |
| srb->total_xfer_length - diff; |
| sg_update_list(srb, d_left_counter); |
| /*srb->total_xfer_length -= diff; */ |
| /*srb->virt_addr += diff; */ |
| /*if (srb->cmd->use_sg) */ |
| /* srb->sg_index++; */ |
| } |
| } |
| } |
| if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) { |
| cleanup_after_transfer(acb, srb); |
| } |
| } |
| |
| |
| static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status) |
| { |
| dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n", |
| srb->cmd, srb->cmd->device->id, srb->cmd->device->lun); |
| clear_fifo(acb, "data_out_phase1"); |
| /* do prepare before transfer when data out phase */ |
| data_io_transfer(acb, srb, XFERDATAOUT); |
| } |
| |
| static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status) |
| { |
| u16 scsi_status = *pscsi_status; |
| |
| dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n", |
| srb->cmd, srb->cmd->device->id, srb->cmd->device->lun); |
| |
| /* |
| * KG: DataIn is much more tricky than DataOut. When the device is finished |
| * and switches to another phase, the SCSI engine should be finished too. |
| * But: There might still be bytes left in its FIFO to be fetched by the DMA |
| * engine and transferred to memory. |
| * We should wait for the FIFOs to be emptied by that (is there any way to |
| * enforce this?) and then stop the DMA engine, because it might think, that |
| * there are more bytes to follow. Yes, the device might disconnect prior to |
| * having all bytes transferred! |
| * Also we should make sure that all data from the DMA engine buffer's really |
| * made its way to the system memory! Some documentation on this would not |
| * seem to be a bad idea, actually. |
| */ |
| if (!(srb->state & SRB_XFERPAD)) { |
| u32 d_left_counter; |
| unsigned int sc, fc; |
| |
| if (scsi_status & PARITYERROR) { |
| dprintkl(KERN_INFO, "data_in_phase0: (0x%p) " |
| "Parity Error\n", srb->cmd); |
| srb->status |= PARITY_ERROR; |
| } |
| /* |
| * KG: We should wait for the DMA FIFO to be empty ... |
| * but: it would be better to wait first for the SCSI FIFO and then the |
| * the DMA FIFO to become empty? How do we know, that the device not already |
| * sent data to the FIFO in a MsgIn phase, eg.? |
| */ |
| if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) { |
| #if 0 |
| int ctr = 6000000; |
| dprintkl(KERN_DEBUG, |
| "DIP0: Wait for DMA FIFO to flush ...\n"); |
| /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */ |
| /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */ |
| /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */ |
| while (! |
| (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) & |
| 0x80) && --ctr); |
| if (ctr < 6000000 - 1) |
| dprintkl(KERN_DEBUG |
| "DIP0: Had to wait for DMA ...\n"); |
| if (!ctr) |
| dprintkl(KERN_ERR, |
| "Deadlock in DIP0 waiting for DMA FIFO empty!!\n"); |
| /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */ |
| #endif |
| dprintkdbg(DBG_KG, "data_in_phase0: " |
| "DMA{fifocnt=0x%02x fifostat=0x%02x}\n", |
| DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), |
| DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT)); |
| } |
| /* Now: Check remainig data: The SCSI counters should tell us ... */ |
| sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER); |
| fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); |
| d_left_counter = sc + ((fc & 0x1f) |
| << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 : |
| 0)); |
| dprintkdbg(DBG_KG, "data_in_phase0: " |
| "SCSI{fifocnt=0x%02x%s ctr=0x%08x} " |
| "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} " |
| "Remain{totxfer=%i scsi_fifo+ctr=%i}\n", |
| fc, |
| (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", |
| sc, |
| fc, |
| DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), |
| DC395x_read32(acb, TRM_S1040_DMA_CXCNT), |
| srb->total_xfer_length, d_left_counter); |
| #if DC395x_LASTPIO |
| /* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */ |
| if (d_left_counter |
| && srb->total_xfer_length <= DC395x_LASTPIO) { |
| size_t left_io = srb->total_xfer_length; |
| |
| /*u32 addr = (srb->segment_x[srb->sg_index].address); */ |
| /*sg_update_list (srb, d_left_counter); */ |
| dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) " |
| "for remaining %i bytes:", |
| fc & 0x1f, |
| (srb->dcb->sync_period & WIDE_SYNC) ? |
| "words" : "bytes", |
| srb->total_xfer_length); |
| if (srb->dcb->sync_period & WIDE_SYNC) |
| DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, |
| CFG2_WIDEFIFO); |
| while (left_io) { |
| unsigned char *virt, *base = NULL; |
| unsigned long flags = 0; |
| size_t len = left_io; |
| size_t offset = srb->request_length - left_io; |
| |
| local_irq_save(flags); |
| /* Assumption: it's inside one page as it's at most 4 bytes and |
| I just assume it's on a 4-byte boundary */ |
| base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd), |
| srb->sg_count, &offset, &len); |
| virt = base + offset; |
| |
| left_io -= len; |
| |
| while (len) { |
| u8 byte; |
| byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); |
| *virt++ = byte; |
| |
| if (debug_enabled(DBG_PIO)) |
| printk(" %02x", byte); |
| |
| d_left_counter--; |
| sg_subtract_one(srb); |
| |
| len--; |
| |
| fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); |
| |
| if (fc == 0x40) { |
| left_io = 0; |
| break; |
| } |
| } |
| |
| WARN_ON((fc != 0x40) == !d_left_counter); |
| |
| if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) { |
| /* Read the last byte ... */ |
| if (srb->total_xfer_length > 0) { |
| u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); |
| |
| *virt++ = byte; |
| srb->total_xfer_length--; |
| if (debug_enabled(DBG_PIO)) |
| printk(" %02x", byte); |
| } |
| |
| DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); |
| } |
| |
| scsi_kunmap_atomic_sg(base); |
| local_irq_restore(flags); |
| } |
| /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */ |
| /*srb->total_xfer_length = 0; */ |
| if (debug_enabled(DBG_PIO)) |
| printk("\n"); |
| } |
| #endif /* DC395x_LASTPIO */ |
| |
| #if 0 |
| /* |
| * KG: This was in DATAOUT. Does it also belong here? |
| * Nobody seems to know what counter and fifo_cnt count exactly ... |
| */ |
| if (!(scsi_status & SCSIXFERDONE)) { |
| /* |
| * when data transfer from DMA FIFO to SCSI FIFO |
| * if there was some data left in SCSI FIFO |
| */ |
| d_left_counter = |
| (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & |
| 0x1F); |
| if (srb->dcb->sync_period & WIDE_SYNC) |
| d_left_counter <<= 1; |
| /* |
| * if WIDE scsi SCSI FIFOCNT unit is word !!! |
| * so need to *= 2 |
| * KG: Seems to be correct ... |
| */ |
| } |
| #endif |
| /* KG: This should not be needed any more! */ |
| if (d_left_counter == 0 |
| || (scsi_status & SCSIXFERCNT_2_ZERO)) { |
| #if 0 |
| int ctr = 6000000; |
| u8 TempDMAstatus; |
| do { |
| TempDMAstatus = |
| DC395x_read8(acb, TRM_S1040_DMA_STATUS); |
| } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr); |
| if (!ctr) |
| dprintkl(KERN_ERR, |
| "Deadlock in DataInPhase0 waiting for DMA!!\n"); |
| srb->total_xfer_length = 0; |
| #endif |
| srb->total_xfer_length = d_left_counter; |
| } else { /* phase changed */ |
| /* |
| * parsing the case: |
| * when a transfer not yet complete |
| * but be disconnected by target |
| * if transfer not yet complete |
| * there were some data residue in SCSI FIFO or |
| * SCSI transfer counter not empty |
| */ |
| sg_update_list(srb, d_left_counter); |
| } |
| } |
| /* KG: The target may decide to disconnect: Empty FIFO before! */ |
| if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) { |
| cleanup_after_transfer(acb, srb); |
| } |
| } |
| |
| |
| static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status) |
| { |
| dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n", |
| srb->cmd, srb->cmd->device->id, srb->cmd->device->lun); |
| data_io_transfer(acb, srb, XFERDATAIN); |
| } |
| |
| |
| static void data_io_transfer(struct AdapterCtlBlk *acb, |
| struct ScsiReqBlk *srb, u16 io_dir) |
| { |
| struct DeviceCtlBlk *dcb = srb->dcb; |
| u8 bval; |
| dprintkdbg(DBG_0, |
| "data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n", |
| srb->cmd, srb->cmd->device->id, srb->cmd->device->lun, |
| ((io_dir & DMACMD_DIR) ? 'r' : 'w'), |
| srb->total_xfer_length, srb->sg_index, srb->sg_count); |
| if (srb == acb->tmp_srb) |
| dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n"); |
| if (srb->sg_index >= srb->sg_count) { |
| /* can't happen? out of bounds error */ |
| return; |
| } |
| |
| if (srb->total_xfer_length > DC395x_LASTPIO) { |
| u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); |
| /* |
| * KG: What should we do: Use SCSI Cmd 0x90/0x92? |
| * Maybe, even ABORTXFER would be appropriate |
| */ |
| if (dma_status & XFERPENDING) { |
| dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! " |
| "Expect trouble!\n"); |
| dump_register_info(acb, dcb, srb); |
| DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); |
| } |
| /* clear_fifo(acb, "IO"); */ |
| /* |
| * load what physical address of Scatter/Gather list table |
| * want to be transfer |
| */ |
| srb->state |= SRB_DATA_XFER; |
| DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0); |
| if (scsi_sg_count(srb->cmd)) { /* with S/G */ |
| io_dir |= DMACMD_SG; |
| DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, |
| srb->sg_bus_addr + |
| sizeof(struct SGentry) * |
| srb->sg_index); |
| /* load how many bytes in the sg list table */ |
| DC395x_write32(acb, TRM_S1040_DMA_XCNT, |
| ((u32)(srb->sg_count - |
| srb->sg_index) << 3)); |
| } else { /* without S/G */ |
| io_dir &= ~DMACMD_SG; |
| DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, |
| srb->segment_x[0].address); |
| DC395x_write32(acb, TRM_S1040_DMA_XCNT, |
| srb->segment_x[0].length); |
| } |
| /* load total transfer length (24bits) max value 16Mbyte */ |
| DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, |
| srb->total_xfer_length); |
| DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ |
| if (io_dir & DMACMD_DIR) { /* read */ |
| DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, |
| SCMD_DMA_IN); |
| DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); |
| } else { |
| DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); |
| DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, |
| SCMD_DMA_OUT); |
| } |
| |
| } |
| #if DC395x_LASTPIO |
| else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */ |
| /* |
| * load what physical address of Scatter/Gather list table |
| * want to be transfer |
| */ |
| srb->state |= SRB_DATA_XFER; |
| /* load total transfer length (24bits) max value 16Mbyte */ |
| DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, |
| srb->total_xfer_length); |
| DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ |
| if (io_dir & DMACMD_DIR) { /* read */ |
| DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, |
| SCMD_FIFO_IN); |
| } else { /* write */ |
| int ln = srb->total_xfer_length; |
| size_t left_io = srb->total_xfer_length; |
| |
| if (srb->dcb->sync_period & WIDE_SYNC) |
| DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, |
| CFG2_WIDEFIFO); |
| |
| while (left_io) { |
| unsigned char *virt, *base = NULL; |
| unsigned long flags = 0; |
| size_t len = left_io; |
| size_t offset = srb->request_length - left_io; |
| |
| local_irq_save(flags); |
| /* Again, max 4 bytes */ |
| base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd), |
| srb->sg_count, &offset, &len); |
| virt = base + offset; |
| |
| left_io -= len; |
| |
| while (len--) { |
| if (debug_enabled(DBG_PIO)) |
| printk(" %02x", *virt); |
| |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++); |
| |
| sg_subtract_one(srb); |
| } |
| |
| scsi_kunmap_atomic_sg(base); |
| local_irq_restore(flags); |
| } |
| if (srb->dcb->sync_period & WIDE_SYNC) { |
| if (ln % 2) { |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); |
| if (debug_enabled(DBG_PIO)) |
| printk(" |00"); |
| } |
| DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); |
| } |
| /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */ |
| if (debug_enabled(DBG_PIO)) |
| printk("\n"); |
| DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, |
| SCMD_FIFO_OUT); |
| } |
| } |
| #endif /* DC395x_LASTPIO */ |
| else { /* xfer pad */ |
| u8 data = 0, data2 = 0; |
| if (srb->sg_count) { |
| srb->adapter_status = H_OVER_UNDER_RUN; |
| srb->status |= OVER_RUN; |
| } |
| /* |
| * KG: despite the fact that we are using 16 bits I/O ops |
| * the SCSI FIFO is only 8 bits according to the docs |
| * (we can set bit 1 in 0x8f to serialize FIFO access ...) |
| */ |
| if (dcb->sync_period & WIDE_SYNC) { |
| DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2); |
| DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, |
| CFG2_WIDEFIFO); |
| if (io_dir & DMACMD_DIR) { |
| data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); |
| data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); |
| } else { |
| /* Danger, Robinson: If you find KGs |
| * scattered over the wide disk, the driver |
| * or chip is to blame :-( */ |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G'); |
| } |
| DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); |
| } else { |
| DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); |
| /* Danger, Robinson: If you find a collection of Ks on your disk |
| * something broke :-( */ |
| if (io_dir & DMACMD_DIR) |
| data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); |
| else |
| DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); |
| } |
| srb->state |= SRB_XFERPAD; |
| DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ |
| /* SCSI command */ |
| bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT; |
| DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval); |
| } |
| } |
| |
| |
| static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status) |
| { |
| dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n", |
| srb->cmd, srb->cmd->device->id, srb->cmd->device->lun); |
| srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); |
| srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */ |
| srb->state = SRB_COMPLETED; |
| *pscsi_status = PH_BUS_FREE; /*.. initial phase */ |
| DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ |
| DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); |
| } |
| |
| |
| static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status) |
| { |
| dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n", |
| srb->cmd, srb->cmd->device->id, srb->cmd->device->lun); |
| srb->state = SRB_STATUS; |
| DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ |
| DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP); |
| } |
| |
| |
| /* Check if the message is complete */ |
| static inline u8 msgin_completed(u8 * msgbuf, u32 len) |
| { |
| if (*msgbuf == EXTENDED_MESSAGE) { |
| if (len < 2) |
| return 0; |
| if (len < msgbuf[1] + 2) |
| return 0; |
| } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */ |
| if (len < 2) |
| return 0; |
| return 1; |
| } |
| |
| /* reject_msg */ |
| static inline void msgin_reject(struct AdapterCtlBlk *acb, |
| struct ScsiReqBlk *srb) |
| { |
| srb->msgout_buf[0] = MESSAGE_REJECT; |
| srb->msg_count = 1; |
| DC395x_ENABLE_MSGOUT; |
| srb->state &= ~SRB_MSGIN; |
| srb->state |= SRB_MSGOUT; |
| dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n", |
| srb->msgin_buf[0], |
| srb->dcb->target_id, srb->dcb->target_lun); |
| } |
| |
| |
| static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb, |
| struct DeviceCtlBlk *dcb, u8 tag) |
| { |
| struct ScsiReqBlk *srb = NULL; |
| struct ScsiReqBlk *i; |
| dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n", |
| srb->cmd, tag, srb); |
| |
| if (!(dcb->tag_mask & (1 << tag))) |
| dprintkl(KERN_DEBUG, |
| "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n", |
| dcb->tag_mask, tag); |
| |
| if (list_empty(&dcb->srb_going_list)) |
| goto mingx0; |
| list_for_each_entry(i, &dcb->srb_going_list, list) { |
| if (i->tag_number == tag) { |
| srb = i; |
| break; |
| } |
| } |
| if (!srb) |
| goto mingx0; |
| |
| dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n", |
| srb->cmd, srb->dcb->target_id, srb->dcb->target_lun); |
| if (dcb->flag & ABORT_DEV_) { |
| /*srb->state = SRB_ABORT_SENT; */ |
| enable_msgout_abort(acb, srb); |
| } |
| |
| if (!(srb->state & SRB_DISCONNECT)) |
| goto mingx0; |
| |
| memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len); |
| srb->state |= dcb->active_srb->state; |
| srb->state |= SRB_DATA_XFER; |
| dcb->active_srb = srb; |
| /* How can we make the DORS happy? */ |
| return srb; |
| |
| mingx0: |
| srb = acb->tmp_srb; |
| srb->state = SRB_UNEXPECT_RESEL; |
| dcb->active_srb = srb; |
| srb->msgout_buf[0] = MSG_ABORT_TAG; |
| srb->msg_count = 1; |
| DC395x_ENABLE_MSGOUT; |
| dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag); |
| return srb; |
| } |
| |
| |
| static inline void reprogram_regs(struct AdapterCtlBlk *acb, |
| struct DeviceCtlBlk *dcb) |
| { |
| DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); |
| DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); |
| DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); |
| set_xfer_rate(acb, dcb); |
| } |
| |
| |
| /* set async transfer mode */ |
| static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) |
| { |
| struct DeviceCtlBlk *dcb = srb->dcb; |
| dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n", |
| dcb->target_id, dcb->target_lun); |
| |
| dcb->sync_mode &= ~(SYNC_NEGO_ENABLE); |
| dcb->sync_mode |= SYNC_NEGO_DONE; |
| /*dcb->sync_period &= 0; */ |
| dcb->sync_offset = 0; |
| dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */ |
| srb->state &= ~SRB_DO_SYNC_NEGO; |
| reprogram_regs(acb, dcb); |
| if ((dcb->sync_mode & WIDE_NEGO_ENABLE) |
| && !(dcb->sync_mode & WIDE_NEGO_DONE)) { |
| build_wdtr(acb, dcb, srb); |
| DC395x_ENABLE_MSGOUT; |
| dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n"); |
| } |
| } |
| |
| |
| /* set sync transfer mode */ |
| static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) |
| { |
| struct DeviceCtlBlk *dcb = srb->dcb; |
| u8 bval; |
| int fact; |
| dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins " |
| "(%02i.%01i MHz) Offset %i\n", |
| dcb->target_id, srb->msgin_buf[3] << 2, |
| (250 / srb->msgin_buf[3]), |
| ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3], |
| srb->msgin_buf[4]); |
| |
| if (srb->msgin_buf[4] > 15) |
| srb->msgin_buf[4] = 15; |
| if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) |
| dcb->sync_offset = 0; |
| else if (dcb->sync_offset == 0) |
| dcb->sync_offset = srb->msgin_buf[4]; |
| if (srb->msgin_buf[4] > dcb->sync_offset) |
| srb->msgin_buf[4] = dcb->sync_offset; |
| else |
| dcb->sync_offset = srb->msgin_buf[4]; |
| bval = 0; |
| while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval] |
| || dcb->min_nego_period > |
| clock_period[bval])) |
| bval++; |
| if (srb->msgin_buf[3] < clock_period[bval]) |
| dprintkl(KERN_INFO, |
| "msgin_set_sync: Increase sync nego period to %ins\n", |
| clock_period[bval] << 2); |
| srb->msgin_buf[3] = clock_period[bval]; |
| dcb->sync_period &= 0xf0; |
| dcb->sync_period |= ALT_SYNC | bval; |
| dcb->min_nego_period = srb->msgin_buf[3]; |
| |
| if (dcb->sync_period & WIDE_SYNC) |
| fact = 500; |
| else |
| fact = 250; |
| |
| dprintkl(KERN_INFO, |
| "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n", |
| dcb->target_id, (fact == 500) ? "Wide16" : "", |
| dcb->min_nego_period << 2, dcb->sync_offset, |
| (fact / dcb->min_nego_period), |
| ((fact % dcb->min_nego_period) * 10 + |
| dcb->min_nego_period / 2) / dcb->min_nego_period); |
| |
| if (!(srb->state & SRB_DO_SYNC_NEGO)) { |
| /* Reply with corrected SDTR Message */ |
| dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n", |
| srb->msgin_buf[3] << 2, srb->msgin_buf[4]); |
| |
| memcpy(srb->msgout_buf, srb->msgin_buf, 5); |
| srb->msg_count = 5; |
| DC395x_ENABLE_MSGOUT; |
| dcb->sync_mode |= SYNC_NEGO_DONE; |
| } else { |
| if ((dcb->sync_mode & WIDE_NEGO_ENABLE) |
| && !(dcb->sync_mode & WIDE_NEGO_DONE)) { |
| build_wdtr(acb, dcb, srb); |
| DC395x_ENABLE_MSGOUT; |
| dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n"); |
| } |
| } |
| srb->state &= ~SRB_DO_SYNC_NEGO; |
| dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE; |
| |
| reprogram_regs(acb, dcb); |
| } |
| |
| |
| static inline void msgin_set_nowide(struct AdapterCtlBlk *acb, |
| struct ScsiReqBlk *srb) |
| { |
| struct DeviceCtlBlk *dcb = srb->dcb; |
| dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id); |
| |
| dcb->sync_period &= ~WIDE_SYNC; |
| dcb->sync_mode &= ~(WIDE_NEGO_ENABLE); |
| dcb->sync_mode |= WIDE_NEGO_DONE; |
| srb->state &= ~SRB_DO_WIDE_NEGO; |
| reprogram_regs(acb, dcb); |
| if ((dcb->sync_mode & SYNC_NEGO_ENABLE) |
| && !(dcb->sync_mode & SYNC_NEGO_DONE)) { |
| build_sdtr(acb, dcb, srb); |
| DC395x_ENABLE_MSGOUT; |
| dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n"); |
| } |
| } |
| |
| static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) |
| { |
| struct DeviceCtlBlk *dcb = srb->dcb; |
| u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO |
| && acb->config & HCC_WIDE_CARD) ? 1 : 0; |
| dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id); |
| |
| if (srb->msgin_buf[3] > wide) |
| srb->msgin_buf[3] = wide; |
| /* Completed */ |
| if (!(srb->state & SRB_DO_WIDE_NEGO)) { |
| dprintkl(KERN_DEBUG, |
| "msgin_set_wide: Wide nego initiated <%02i>\n", |
| dcb->target_id); |
| memcpy(srb->msgout_buf, srb->msgin_buf, 4); |
| srb->msg_count = 4; |
| srb->state |= SRB_DO_WIDE_NEGO; |
| DC395x_ENABLE_MSGOUT; |
| } |
| |
| dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE); |
| if (srb->msgin_buf[3] > 0) |
| dcb->sync_period |= WIDE_SYNC; |
| else |
| dcb->sync_period &= ~WIDE_SYNC; |
| srb->state &= ~SRB_DO_WIDE_NEGO; |
| /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */ |
| dprintkdbg(DBG_1, |
| "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n", |
| (8 << srb->msgin_buf[3]), dcb->target_id); |
| reprogram_regs(acb, dcb); |
| if ((dcb->sync_mode & SYNC_NEGO_ENABLE) |
| && !(dcb->sync_mode & SYNC_NEGO_DONE)) { |
| build_sdtr(acb, dcb, srb); |
| DC395x_ENABLE_MSGOUT; |
| dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n"); |
| } |
| } |
| |
| |
| /* |
| * extended message codes: |
| * |
| * code description |
| * |
| * 02h Reserved |
| * 00h MODIFY DATA POINTER |
| * 01h SYNCHRONOUS DATA TRANSFER REQUEST |
| * 03h WIDE DATA TRANSFER REQUEST |
| * 04h - 7Fh Reserved |
| * 80h - FFh Vendor specific |
| */ |
| static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status) |
| { |
| struct DeviceCtlBlk *dcb = acb->active_dcb; |
| dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd); |
| |
| srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); |
| if (msgin_completed(srb->msgin_buf, acb->msg_len)) { |
| /* Now eval the msg */ |
| switch (srb->msgin_buf[0]) { |
| case DISCONNECT: |
| srb->state = SRB_DISCONNECT; |
| break; |
| |
| case SIMPLE_QUEUE_TAG: |
| case HEAD_OF_QUEUE_TAG: |
| case ORDERED_QUEUE_TAG: |
| srb = |
| msgin_qtag(acb, dcb, |
| srb->msgin_buf[1]); |
| break; |
| |
| case MESSAGE_REJECT: |
| DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, |
| DO_CLRATN | DO_DATALATCH); |
| /* A sync nego message was rejected ! */ |
| if (srb->state & SRB_DO_SYNC_NEGO) { |
| msgin_set_async(acb, srb); |
| break; |
| } |
| /* A wide nego message was rejected ! */ |
| if (srb->state & SRB_DO_WIDE_NEGO) { |
| msgin_set_nowide(acb, srb); |
| break; |
| } |
| enable_msgout_abort(acb, srb); |
| /*srb->state |= SRB_ABORT_SENT */ |
| break; |
| |
| case EXTENDED_MESSAGE: |
| /* SDTR */ |
| if (srb->msgin_buf[1] == 3 |
| && srb->msgin_buf[2] == EXTENDED_SDTR) { |
| msgin_set_sync(acb, srb); |
| break; |
| } |
| /* WDTR */ |
| if (srb->msgin_buf[1] == 2 |
| && srb->msgin_buf[2] == EXTENDED_WDTR |
| && srb->msgin_buf[3] <= 2) { /* sanity check ... */ |
| msgin_set_wide(acb, srb); |
| break; |
| } |
| msgin_reject(acb, srb); |
| break; |
| |
| case MSG_IGNOREWIDE: |
| /* Discard wide residual */ |
| dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n"); |
| break; |
| |
| case COMMAND_COMPLETE: |
| /* nothing has to be done */ |
| break; |
| |
| case SAVE_POINTERS: |
| /* |
| * SAVE POINTER may be ignored as we have the struct |
| * ScsiReqBlk* associated with the scsi command. |
| */ |
| dprintkdbg(DBG_0, "msgin_phase0: (0x%p) " |
| "SAVE POINTER rem=%i Ignore\n", |
| srb->cmd, srb->total_xfer_length); |
| break; |
| |
| case RESTORE_POINTERS: |
| dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n"); |
| break; |
| |
| case ABORT: |
| dprintkdbg(DBG_0, "msgin_phase0: (0x%p) " |
| "<%02i-%i> ABORT msg\n", |
| srb->cmd, dcb->target_id, |
| dcb->target_lun); |
| dcb->flag |= ABORT_DEV_; |
| enable_msgout_abort(acb, srb); |
| break; |
| |
| default: |
| /* reject unknown messages */ |
| if (srb->msgin_buf[0] & IDENTIFY_BASE) { |
| dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n"); |
| srb->msg_count = 1; |
| srb->msgout_buf[0] = dcb->identify_msg; |
| DC395x_ENABLE_MSGOUT; |
| srb->state |= SRB_MSGOUT; |
| /*break; */ |
| } |
| msgin_reject(acb, srb); |
| } |
| |
| /* Clear counter and MsgIn state */ |
| srb->state &= ~SRB_MSGIN; |
| acb->msg_len = 0; |
| } |
| *pscsi_status = PH_BUS_FREE; |
| DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */ |
| DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); |
| } |
| |
| |
| static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status) |
| { |
| dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd); |
| clear_fifo(acb, "msgin_phase1"); |
| DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); |
| if (!(srb->state & SRB_MSGIN)) { |
| srb->state &= ~SRB_DISCONNECT; |
| srb->state |= SRB_MSGIN; |
| } |
| DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ |
| /* SCSI command */ |
| DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN); |
| } |
| |
| |
| static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status) |
| { |
| } |
| |
| |
| static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| u16 *pscsi_status) |
| { |
| } |
| |
| |
| static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb) |
| { |
| struct DeviceCtlBlk *i; |
| |
| /* set all lun device's period, offset */ |
| if (dcb->identify_msg & 0x07) |
| return; |
| |
| if (acb->scan_devices) { |
| current_sync_offset = dcb->sync_offset; |
| return; |
| } |
| |
| list_for_each_entry(i, &acb->dcb_list, list) |
| if (i->target_id == dcb->target_id) { |
| i->sync_period = dcb->sync_period; |
| i->sync_offset = dcb->sync_offset; |
| i->sync_mode = dcb->sync_mode; |
| i->min_nego_period = dcb->min_nego_period; |
| } |
| } |
| |
| |
|