diff options
Diffstat (limited to 'drivers/scsi/tmscsim.c')
| -rw-r--r-- | drivers/scsi/tmscsim.c | 2693 |
1 files changed, 2693 insertions, 0 deletions
diff --git a/drivers/scsi/tmscsim.c b/drivers/scsi/tmscsim.c new file mode 100644 index 000000000000..ee9df02efd5b --- /dev/null +++ b/drivers/scsi/tmscsim.c @@ -0,0 +1,2693 @@ +/************************************************************************ + * FILE NAME : TMSCSIM.C * + * BY : C.L. Huang, ching@tekram.com.tw * + * Description: Device Driver for Tekram DC-390(T) PCI SCSI * + * Bus Master Host Adapter * + * (C)Copyright 1995-1996 Tekram Technology Co., Ltd. * + ************************************************************************ + * (C) Copyright: put under GNU GPL in 10/96 * + * (see Documentation/scsi/tmscsim.txt) * + ************************************************************************ + * $Id: tmscsim.c,v 2.60.2.30 2000/12/20 01:07:12 garloff Exp $ * + * Enhancements and bugfixes by * + * Kurt Garloff <kurt@garloff.de> <garloff@suse.de> * + ************************************************************************ + * HISTORY: * + * * + * REV# DATE NAME DESCRIPTION * + * 1.00 96/04/24 CLH First release * + * 1.01 96/06/12 CLH Fixed bug of Media Change for Removable * + * Device, scan all LUN. Support Pre2.0.10 * + * 1.02 96/06/18 CLH Fixed bug of Command timeout ... * + * 1.03 96/09/25 KG Added tmscsim_proc_info() * + * 1.04 96/10/11 CLH Updating for support KV 2.0.x * + * 1.05 96/10/18 KG Fixed bug in DC390_abort(null ptr deref)* + * 1.06 96/10/25 KG Fixed module support * + * 1.07 96/11/09 KG Fixed tmscsim_proc_info() * + * 1.08 96/11/18 KG Fixed null ptr in DC390_Disconnect() * + * 1.09 96/11/30 KG Added register the allocated IO space * + * 1.10 96/12/05 CLH Modified tmscsim_proc_info(), and reset * + * pending interrupt in DC390_detect() * + * 1.11 97/02/05 KG/CLH Fixeds problem with partitions greater * + * than 1GB * + * 1.12 98/02/15 MJ Rewritten PCI probing * + * 1.13 98/04/08 KG Support for non DC390, __initfunc decls,* + * changed max devs from 10 to 16 * + * 1.14a 98/05/05 KG Dynamic DCB allocation, add-single-dev * + * for LUNs if LUN_SCAN (BIOS) not set * + * runtime config using /proc interface * + * 1.14b 98/05/06 KG eliminated cli (); sti (); spinlocks * + * 1.14c 98/05/07 KG 2.0.x compatibility * + * 1.20a 98/05/07 KG changed names of funcs to be consistent * + * DC390_ (entry points), dc390_ (internal)* + * reworked locking * + * 1.20b 98/05/12 KG bugs: version, kfree, _ctmp * + * debug output * + * 1.20c 98/05/12 KG bugs: kfree, parsing, EEpromDefaults * + * 1.20d 98/05/14 KG bugs: list linkage, clear flag after * + * reset on startup, code cleanup * + * 1.20e 98/05/15 KG spinlock comments, name space cleanup * + * pLastDCB now part of ACB structure * + * added stats, timeout for 2.1, TagQ bug * + * RESET and INQUIRY interface commands * + * 1.20f 98/05/18 KG spinlocks fixes, max_lun fix, free DCBs * + * for missing LUNs, pending int * + * 1.20g 98/05/19 KG Clean up: Avoid short * + * 1.20h 98/05/21 KG Remove AdaptSCSIID, max_lun ... * + * 1.20i 98/05/21 KG Aiiie: Bug with TagQMask * + * 1.20j 98/05/24 KG Handle STAT_BUSY, handle pACB->pLinkDCB * + * == 0 in remove_dev and DoingSRB_Done * + * 1.20k 98/05/25 KG DMA_INT (experimental) * + * 1.20l 98/05/27 KG remove DMA_INT; DMA_IDLE cmds added; * + * 1.20m 98/06/10 KG glitch configurable; made some global * + * vars part of ACB; use DC390_readX * + * 1.20n 98/06/11 KG startup params * + * 1.20o 98/06/15 KG added TagMaxNum to boot/module params * + * Device Nr -> Idx, TagMaxNum power of 2 * + * 1.20p 98/06/17 KG Docu updates. Reset depends on settings * + * pci_set_master added; 2.0.xx: pcibios_* * + * used instead of MechNum things ... * + * 1.20q 98/06/23 KG Changed defaults. Added debug code for * + * removable media and fixed it. TagMaxNum * + * fixed for DC390. Locking: ACB, DRV for * + * better IRQ sharing. Spelling: Queueing * + * Parsing and glitch_cfg changes. Display * + * real SyncSpeed value. Made DisConn * + * functional (!) * + * 1.20r 98/06/30 KG Debug macros, allow disabling DsCn, set * + * BIT4 in CtrlR4, EN_PAGE_INT, 2.0 module * + * param -1 fixed. * + * 1.20s 98/08/20 KG Debug info on abort(), try to check PCI,* + * phys_to_bus instead of phys_to_virt, * + * fixed sel. process, fixed locking, * + * added MODULE_XXX infos, changed IRQ * + * request flags, disable DMA_INT * + * 1.20t 98/09/07 KG TagQ report fixed; Write Erase DMA Stat;* + * initfunc -> __init; better abort; * + * Timeout for XFER_DONE & BLAST_COMPLETE; * + * Allow up to 33 commands being processed * + * 2.0a 98/10/14 KG Max Cmnds back to 17. DMA_Stat clearing * + * all flags. Clear within while() loops * + * in DataIn_0/Out_0. Null ptr in dumpinfo * + * for pSRB==0. Better locking during init.* + * bios_param() now respects part. table. * + * 2.0b 98/10/24 KG Docu fixes. Timeout Msg in DMA Blast. * + * Disallow illegal idx in INQUIRY/REMOVE * + * 2.0c 98/11/19 KG Cleaned up detect/init for SMP boxes, * + * Write Erase DMA (1.20t) caused problems * + * 2.0d 98/12/25 KG Christmas release ;-) Message handling * + * completely reworked. Handle target ini- * + * tiated SDTR correctly. * + * 2.0d1 99/01/25 KG Try to handle RESTORE_PTR * + * 2.0d2 99/02/08 KG Check for failure of kmalloc, correct * + * inclusion of scsicam.h, DelayReset * + * 2.0d3 99/05/31 KG DRIVER_OK -> DID_OK, DID_NO_CONNECT, * + * detect Target mode and warn. * + * pcmd->result handling cleaned up. * + * 2.0d4 99/06/01 KG Cleaned selection process. Found bug * + * which prevented more than 16 tags. Now: * + * 24. SDTR cleanup. Cleaner multi-LUN * + * handling. Don't modify ControlRegs/FIFO * + * when connected. * + * 2.0d5 99/06/01 KG Clear DevID, Fix INQUIRY after cfg chg. * + * 2.0d6 99/06/02 KG Added ADD special command to allow cfg. * + * before detection. Reset SYNC_NEGO_DONE * + * after a bus reset. * + * 2.0d7 99/06/03 KG Fixed bugs wrt add,remove commands * + * 2.0d8 99/06/04 KG Removed copying of cmnd into CmdBlock. * + * Fixed Oops in _release(). * + * 2.0d9 99/06/06 KG Also tag queue INQUIRY, T_U_R, ... * + * Allow arb. no. of Tagged Cmnds. Max 32 * + * 2.0d1099/06/20 KG TagMaxNo changes now honoured! Queueing * + * clearified (renamed ..) TagMask handling* + * cleaned. * + * 2.0d1199/06/28 KG cmd->result now identical to 2.0d2 * + * 2.0d1299/07/04 KG Changed order of processing in IRQ * + * 2.0d1399/07/05 KG Don't update DCB fields if removed * + * 2.0d1499/07/05 KG remove_dev: Move kfree() to the end * + * 2.0d1599/07/12 KG use_new_eh_code: 0, ULONG -> UINT where * + * appropriate * + * 2.0d1699/07/13 KG Reenable StartSCSI interrupt, Retry msg * + * 2.0d1799/07/15 KG Remove debug msg. Disable recfg. when * + * there are queued cmnds * + * 2.0d1899/07/18 KG Selection timeout: Don't requeue * + * 2.0d1999/07/18 KG Abort: Only call scsi_done if dequeued * + * 2.0d2099/07/19 KG Rst_Detect: DoingSRB_Done * + * 2.0d2199/08/15 KG dev_id for request/free_irq, cmnd[0] for* + * RETRY, SRBdone does DID_ABORT for the * + * cmd passed by DC390_reset() * + * 2.0d2299/08/25 KG dev_id fixed. can_queue: 42 * + * 2.0d2399/08/25 KG Removed some debugging code. dev_id * + * now is set to pACB. Use u8,u16,u32. * + * 2.0d2499/11/14 KG Unreg. I/O if failed IRQ alloc. Call * + * done () w/ DID_BAD_TARGET in case of * + * missing DCB. We are old EH!! * + * 2.0d2500/01/15 KG 2.3.3x compat from Andreas Schultz * + * set unique_id. Disable RETRY message. * + * 2.0d2600/01/29 KG Go to new EH. * + * 2.0d2700/01/31 KG ... but maintain 2.0 compat. * + * and fix DCB freeing * + * 2.0d2800/02/14 KG Queue statistics fixed, dump special cmd* + * Waiting_Timer for failed StartSCSI * + * New EH: Don't return cmnds to ML on RST * + * Use old EH (don't have new EH fns yet) * + * Reset: Unlock, but refuse to queue * + * 2.3 __setup function * + * 2.0e 00/05/22 KG Return residual for 2.3 * + * 2.0e1 00/05/25 KG Compile fixes for 2.3.99 * + * 2.0e2 00/05/27 KG Jeff Garzik's pci_enable_device() * + * 2.0e3 00/09/29 KG Some 2.4 changes. Don't try Sync Nego * + * before INQUIRY has reported ability. * + * Recognise INQUIRY as scanning command. * + * 2.0e4 00/10/13 KG Allow compilation into 2.4 kernel * + * 2.0e5 00/11/17 KG Store Inq.flags in DCB * + * 2.0e6 00/11/22 KG 2.4 init function (Thx to O.Schumann) * + * 2.4 PCI device table (Thx to A.Richter) * + * 2.0e7 00/11/28 KG Allow overriding of BIOS settings * + * 2.0f 00/12/20 KG Handle failed INQUIRYs during scan * + * 2.1a 03/11/29 GL, KG Initial fixing for 2.6. Convert to * + * use the current PCI-mapping API, update * + * command-queuing. * + * 2.1b 04/04/13 GL Fix for 64-bit platforms * + * 2.1b1 04/01/31 GL (applied 05.04) Remove internal * + * command-queuing. * + * 2.1b2 04/02/01 CH (applied 05.04) Fix error-handling * + * 2.1c 04/05/23 GL Update to use the new pci_driver API, * + * some scsi EH updates, more cleanup. * + * 2.1d 04/05/27 GL Moved setting of scan_devices to * + * slave_alloc/_configure/_destroy, as * + * suggested by CH. * + ***********************************************************************/ + +/* DEBUG options */ +//#define DC390_DEBUG0 +//#define DC390_DEBUG1 +//#define DC390_DCBDEBUG +//#define DC390_PARSEDEBUG +//#define DC390_REMOVABLEDEBUG +//#define DC390_LOCKDEBUG + +//#define NOP do{}while(0) +#define C_NOP + +/* Debug definitions */ +#ifdef DC390_DEBUG0 +# define DEBUG0(x) x +#else +# define DEBUG0(x) C_NOP +#endif +#ifdef DC390_DEBUG1 +# define DEBUG1(x) x +#else +# define DEBUG1(x) C_NOP +#endif +#ifdef DC390_DCBDEBUG +# define DCBDEBUG(x) x +#else +# define DCBDEBUG(x) C_NOP +#endif +#ifdef DC390_PARSEDEBUG +# define PARSEDEBUG(x) x +#else +# define PARSEDEBUG(x) C_NOP +#endif +#ifdef DC390_REMOVABLEDEBUG +# define REMOVABLEDEBUG(x) x +#else +# define REMOVABLEDEBUG(x) C_NOP +#endif +#define DCBDEBUG1(x) C_NOP + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/ioport.h> +#include <linux/pci.h> +#include <linux/proc_fs.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/blkdev.h> +#include <linux/timer.h> +#include <linux/interrupt.h> +#include <linux/init.h> +#include <linux/spinlock.h> +#include <asm/io.h> + +#include <scsi/scsi.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_host.h> +#include <scsi/scsicam.h> +#include <scsi/scsi_tcq.h> + + +#define DC390_BANNER "Tekram DC390/AM53C974" +#define DC390_VERSION "2.1d 2004-05-27" + +#define PCI_DEVICE_ID_AMD53C974 PCI_DEVICE_ID_AMD_SCSI + +#include "tmscsim.h" + + +static void dc390_DataOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus); +static void dc390_DataIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus); +static void dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus); +static void dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus); +static void dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus); +static void dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus); +static void dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus); +static void dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus); +static void dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus); +static void dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus); +static void dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus); +static void dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus); +static void dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus); +static void dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus); + +static void dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB ); +static void dc390_Disconnect( struct dc390_acb* pACB ); +static void dc390_Reselect( struct dc390_acb* pACB ); +static void dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB ); +static void dc390_ScsiRstDetect( struct dc390_acb* pACB ); +static void dc390_EnableMsgOut_Abort(struct dc390_acb*, struct dc390_srb*); +static void dc390_dumpinfo(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB); +static void dc390_ResetDevParam(struct dc390_acb* pACB); + +static u32 dc390_laststatus = 0; +static u8 dc390_adapterCnt = 0; + +/* Startup values, to be overriden on the commandline */ +static int tmscsim[] = {-2, -2, -2, -2, -2, -2}; + +module_param_array(tmscsim, int, NULL, 0); +MODULE_PARM_DESC(tmscsim, "Host SCSI ID, Speed (0=10MHz), Device Flags, Adapter Flags, Max Tags (log2(tags)-1), DelayReset (s)"); +MODULE_AUTHOR("C.L. Huang / Kurt Garloff"); +MODULE_DESCRIPTION("SCSI host adapter driver for Tekram DC390 and other AMD53C974A based PCI SCSI adapters"); +MODULE_LICENSE("GPL"); +MODULE_SUPPORTED_DEVICE("sd,sr,sg,st"); + +static void *dc390_phase0[]={ + dc390_DataOut_0, + dc390_DataIn_0, + dc390_Command_0, + dc390_Status_0, + dc390_Nop_0, + dc390_Nop_0, + dc390_MsgOut_0, + dc390_MsgIn_0, + dc390_Nop_1 + }; + +static void *dc390_phase1[]={ + dc390_DataOutPhase, + dc390_DataInPhase, + dc390_CommandPhase, + dc390_StatusPhase, + dc390_Nop_0, + dc390_Nop_0, + dc390_MsgOutPhase, + dc390_MsgInPhase, + dc390_Nop_1 + }; + +#ifdef DC390_DEBUG1 +static char* dc390_p0_str[] = { + "dc390_DataOut_0", + "dc390_DataIn_0", + "dc390_Command_0", + "dc390_Status_0", + "dc390_Nop_0", + "dc390_Nop_0", + "dc390_MsgOut_0", + "dc390_MsgIn_0", + "dc390_Nop_1" + }; + +static char* dc390_p1_str[] = { + "dc390_DataOutPhase", + "dc390_DataInPhase", + "dc390_CommandPhase", + "dc390_StatusPhase", + "dc390_Nop_0", + "dc390_Nop_0", + "dc390_MsgOutPhase", + "dc390_MsgInPhase", + "dc390_Nop_1" + }; +#endif + +static u8 dc390_eepromBuf[MAX_ADAPTER_NUM][EE_LEN]; +static u8 dc390_clock_period1[] = {4, 5, 6, 7, 8, 10, 13, 20}; +static u8 dc390_clock_speed[] = {100,80,67,57,50, 40, 31, 20}; + +/*********************************************************************** + * Functions for the management of the internal structures + * (DCBs, SRBs, Queueing) + * + **********************************************************************/ +static struct dc390_dcb __inline__ *dc390_findDCB ( struct dc390_acb* pACB, u8 id, u8 lun) +{ + struct dc390_dcb* pDCB = pACB->pLinkDCB; if (!pDCB) return NULL; + while (pDCB->TargetID != id || pDCB->TargetLUN != lun) + { + pDCB = pDCB->pNextDCB; + if (pDCB == pACB->pLinkDCB) + return NULL; + } + DCBDEBUG1( printk (KERN_DEBUG "DCB %p (%02x,%02x) found.\n", \ + pDCB, pDCB->TargetID, pDCB->TargetLUN)); + return pDCB; +} + +/* Insert SRB oin top of free list */ +static __inline__ void dc390_Free_insert (struct dc390_acb* pACB, struct dc390_srb* pSRB) +{ + DEBUG0(printk ("DC390: Free SRB %p\n", pSRB)); + pSRB->pNextSRB = pACB->pFreeSRB; + pACB->pFreeSRB = pSRB; +} + +static __inline__ void dc390_Going_append (struct dc390_dcb* pDCB, struct dc390_srb* pSRB) +{ + pDCB->GoingSRBCnt++; + DEBUG0(printk("DC390: Append SRB %p to Going\n", pSRB)); + /* Append to the list of Going commands */ + if( pDCB->pGoingSRB ) + pDCB->pGoingLast->pNextSRB = pSRB; + else + pDCB->pGoingSRB = pSRB; + + pDCB->pGoingLast = pSRB; + /* No next one in sent list */ + pSRB->pNextSRB = NULL; +} + +static __inline__ void dc390_Going_remove (struct dc390_dcb* pDCB, struct dc390_srb* pSRB) +{ + DEBUG0(printk("DC390: Remove SRB %p from Going\n", pSRB)); + if (pSRB == pDCB->pGoingSRB) + pDCB->pGoingSRB = pSRB->pNextSRB; + else + { + struct dc390_srb* psrb = pDCB->pGoingSRB; + while (psrb && psrb->pNextSRB != pSRB) + psrb = psrb->pNextSRB; + if (!psrb) + { printk (KERN_ERR "DC390: Remove non-ex. SRB %p from Going!\n", pSRB); return; } + psrb->pNextSRB = pSRB->pNextSRB; + if (pSRB == pDCB->pGoingLast) + pDCB->pGoingLast = psrb; + } + pDCB->GoingSRBCnt--; +} + +static struct scatterlist* dc390_sg_build_single(struct scatterlist *sg, void *addr, unsigned int length) +{ + memset(sg, 0, sizeof(struct scatterlist)); + sg->page = virt_to_page(addr); + sg->length = length; + sg->offset = (unsigned long)addr & ~PAGE_MASK; + return sg; +} + +/* Create pci mapping */ +static int dc390_pci_map (struct dc390_srb* pSRB) +{ + int error = 0; + struct scsi_cmnd *pcmd = pSRB->pcmd; + struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev; + dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp)); + + /* Map sense buffer */ + if (pSRB->SRBFlag & AUTO_REQSENSE) { + pSRB->pSegmentList = dc390_sg_build_single(&pSRB->Segmentx, pcmd->sense_buffer, sizeof(pcmd->sense_buffer)); + pSRB->SGcount = pci_map_sg(pdev, pSRB->pSegmentList, 1, + DMA_FROM_DEVICE); + cmdp->saved_dma_handle = sg_dma_address(pSRB->pSegmentList); + + /* TODO: error handling */ + if (pSRB->SGcount != 1) + error = 1; + DEBUG1(printk("%s(): Mapped sense buffer %p at %x\n", __FUNCTION__, pcmd->sense_buffer, cmdp->saved_dma_handle)); + /* Map SG list */ + } else if (pcmd->use_sg) { + pSRB->pSegmentList = (struct scatterlist *) pcmd->request_buffer; + pSRB->SGcount = pci_map_sg(pdev, pSRB->pSegmentList, pcmd->use_sg, + pcmd->sc_data_direction); + /* TODO: error handling */ + if (!pSRB->SGcount) + error = 1; + DEBUG1(printk("%s(): Mapped SG %p with %d (%d) elements\n",\ + __FUNCTION__, pcmd->request_buffer, pSRB->SGcount, pcmd->use_sg)); + /* Map single segment */ + } else if (pcmd->request_buffer && pcmd->request_bufflen) { + pSRB->pSegmentList = dc390_sg_build_single(&pSRB->Segmentx, pcmd->request_buffer, pcmd->request_bufflen); + pSRB->SGcount = pci_map_sg(pdev, pSRB->pSegmentList, 1, + pcmd->sc_data_direction); + cmdp->saved_dma_handle = sg_dma_address(pSRB->pSegmentList); + + /* TODO: error handling */ + if (pSRB->SGcount != 1) + error = 1; + DEBUG1(printk("%s(): Mapped request buffer %p at %x\n", __FUNCTION__, pcmd->request_buffer, cmdp->saved_dma_handle)); + /* No mapping !? */ + } else + pSRB->SGcount = 0; + + return error; +} + +/* Remove pci mapping */ +static void dc390_pci_unmap (struct dc390_srb* pSRB) +{ + struct scsi_cmnd *pcmd = pSRB->pcmd; + struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev; + DEBUG1(dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp))); + + if (pSRB->SRBFlag) { + pci_unmap_sg(pdev, &pSRB->Segmentx, 1, DMA_FROM_DEVICE); + DEBUG1(printk("%s(): Unmapped sense buffer at %x\n", __FUNCTION__, cmdp->saved_dma_handle)); + } else if (pcmd->use_sg) { + pci_unmap_sg(pdev, pcmd->request_buffer, pcmd->use_sg, pcmd->sc_data_direction); + DEBUG1(printk("%s(): Unmapped SG at %p with %d elements\n", __FUNCTION__, pcmd->request_buffer, pcmd->use_sg)); + } else if (pcmd->request_buffer && pcmd->request_bufflen) { + pci_unmap_sg(pdev, &pSRB->Segmentx, 1, pcmd->sc_data_direction); + DEBUG1(printk("%s(): Unmapped request buffer at %x\n", __FUNCTION__, cmdp->saved_dma_handle)); + } +} + +static void __inline__ +dc390_freetag (struct dc390_dcb* pDCB, struct dc390_srb* pSRB) +{ + if (pSRB->TagNumber != SCSI_NO_TAG) { + pDCB->TagMask &= ~(1 << pSRB->TagNumber); /* free tag mask */ + pSRB->TagNumber = SCSI_NO_TAG; + } +} + + +static int +dc390_StartSCSI( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB ) +{ + struct scsi_cmnd *scmd = pSRB->pcmd; + struct scsi_device *sdev = scmd->device; + u8 cmd, disc_allowed, try_sync_nego; + char tag[2]; + + pSRB->ScsiPhase = SCSI_NOP0; + + if (pACB->Connected) + { + // Should not happen normally + printk (KERN_WARNING "DC390: Can't select when connected! (%08x,%02x)\n", + pSRB->SRBState, pSRB->SRBFlag); + pSRB->SRBState = SRB_READY; + pACB->SelConn++; + return 1; + } + if (time_before (jiffies, pACB->pScsiHost->last_reset)) + { + DEBUG0(printk ("DC390: We were just reset and don't accept commands yet!\n")); + return 1; + } + /* KG: Moved pci mapping here */ + dc390_pci_map(pSRB); + /* TODO: error handling */ + DC390_write8 (Scsi_Dest_ID, pDCB->TargetID); + DC390_write8 (Sync_Period, pDCB->SyncPeriod); + DC390_write8 (Sync_Offset, pDCB->SyncOffset); + DC390_write8 (CtrlReg1, pDCB->CtrlR1); + DC390_write8 (CtrlReg3, pDCB->CtrlR3); + DC390_write8 (CtrlReg4, pDCB->CtrlR4); + DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD); /* Flush FIFO */ + DEBUG1(printk (KERN_INFO "DC390: Start SCSI command: %02x (Sync:%02x)\n",\ + scmd->cmnd[0], pDCB->SyncMode)); + + /* Don't disconnect on AUTO_REQSENSE, cause it might be an + * Contingent Allegiance Condition (6.6), where no tags should be used. + * All other have to be allowed to disconnect to prevent Incorrect + * Initiator Connection (6.8.2/6.5.2) */ + /* Changed KG, 99/06/06 */ + if (! (pSRB->SRBFlag & AUTO_REQSENSE)) + disc_allowed = pDCB->DevMode & EN_DISCONNECT_; + else + disc_allowed = 0; + + if ((pDCB->SyncMode & SYNC_ENABLE) && pDCB->TargetLUN == 0 && sdev->sdtr && + (((scmd->cmnd[0] == REQUEST_SENSE || (pSRB->SRBFlag & AUTO_REQSENSE)) && + !(pDCB->SyncMode & SYNC_NEGO_DONE)) || scmd->cmnd[0] == INQUIRY)) + try_sync_nego = 1; + else + try_sync_nego = 0; + + pSRB->MsgCnt = 0; + cmd = SEL_W_ATN; + DC390_write8 (ScsiFifo, IDENTIFY(disc_allowed, pDCB->TargetLUN)); + /* Change 99/05/31: Don't use tags when not disconnecting (BUSY) */ + if ((pDCB->SyncMode & EN_TAG_QUEUEING) && disc_allowed && scsi_populate_tag_msg(scmd, tag)) { + DC390_write8(ScsiFifo, tag[0]); + pDCB->TagMask |= 1 << tag[1]; + pSRB->TagNumber = tag[1]; + DC390_write8(ScsiFifo, tag[1]); + DEBUG1(printk(KERN_INFO "DC390: Select w/DisCn for Cmd %li (SRB %p), block tag %02x\n", scmd->pid, pSRB, tag[1])); + cmd = SEL_W_ATN3; + } else { + /* No TagQ */ +//no_tag: + DEBUG1(printk(KERN_INFO "DC390: Select w%s/DisCn for Cmd %li (SRB %p), No TagQ\n", disc_allowed ? "" : "o", scmd->pid, pSRB)); + } + + pSRB->SRBState = SRB_START_; + + if (try_sync_nego) + { + u8 Sync_Off = pDCB->SyncOffset; + DEBUG0(printk (KERN_INFO "DC390: NEW Sync Nego code triggered (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN)); + pSRB->MsgOutBuf[0] = EXTENDED_MESSAGE; + pSRB->MsgOutBuf[1] = 3; + pSRB->MsgOutBuf[2] = EXTENDED_SDTR; + pSRB->MsgOutBuf[3] = pDCB->NegoPeriod; + if (!(Sync_Off & 0x0f)) Sync_Off = SYNC_NEGO_OFFSET; + pSRB->MsgOutBuf[4] = Sync_Off; + pSRB->MsgCnt = 5; + //pSRB->SRBState = SRB_MSGOUT_; + pSRB->SRBState |= DO_SYNC_NEGO; + cmd = SEL_W_ATN_STOP; + } + + /* Command is written in CommandPhase, if SEL_W_ATN_STOP ... */ + if (cmd != SEL_W_ATN_STOP) + { + if( pSRB->SRBFlag & AUTO_REQSENSE ) + { + DC390_write8 (ScsiFifo, REQUEST_SENSE); + DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5); + DC390_write8 (ScsiFifo, 0); + DC390_write8 (ScsiFifo, 0); + DC390_write8 (ScsiFifo, sizeof(scmd->sense_buffer)); + DC390_write8 (ScsiFifo, 0); + DEBUG1(printk (KERN_DEBUG "DC390: AutoReqSense !\n")); + } + else /* write cmnd to bus */ + { + u8 *ptr; u8 i; + ptr = (u8 *)scmd->cmnd; + for (i = 0; i < scmd->cmd_len; i++) + DC390_write8 (ScsiFifo, *(ptr++)); + } + } + DEBUG0(if (pACB->pActiveDCB) \ + printk (KERN_WARNING "DC390: ActiveDCB != 0\n")); + DEBUG0(if (pDCB->pActiveSRB) \ + printk (KERN_WARNING "DC390: ActiveSRB != 0\n")); + //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD); + if (DC390_read8 (Scsi_Status) & INTERRUPT) + { + dc390_freetag (pDCB, pSRB); + DEBUG0(printk ("DC390: Interrupt during Start SCSI (pid %li, target %02i-%02i)\n", + scmd->pid, scmd->device->id, scmd->device->lun)); + pSRB->SRBState = SRB_READY; + //DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD); + pACB->SelLost++; + return 1; + } + DC390_write8 (ScsiCmd, cmd); + pACB->pActiveDCB = pDCB; + pDCB->pActiveSRB = pSRB; + pACB->Connected = 1; + pSRB->ScsiPhase = SCSI_NOP1; + return 0; +} + +//#define DMA_INT EN_DMA_INT /*| EN_PAGE_INT*/ +#define DMA_INT 0 + +#if DMA_INT +/* This is similar to AM53C974.c ... */ +static u8 +dc390_dma_intr (struct dc390_acb* pACB) +{ + struct dc390_srb* pSRB; + u8 dstate; + DEBUG0(u16 pstate; struct pci_dev *pdev = pACB->pdev); + + DEBUG0(pci_read_config_word(pdev, PCI_STATUS, &pstate)); + DEBUG0(if (pstate & (PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY))\ + { printk(KERN_WARNING "DC390: PCI state = %04x!\n", pstate); \ + pci_write_config_word(pdev, PCI_STATUS, (PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY));}); + + dstate = DC390_read8 (DMA_Status); + + if (! pACB->pActiveDCB || ! pACB->pActiveDCB->pActiveSRB) return dstate; + else pSRB = pACB->pActiveDCB->pActiveSRB; + + if (dstate & (DMA_XFER_ABORT | DMA_XFER_ERROR | POWER_DOWN | PCI_MS_ABORT)) + { + printk (KERN_ERR "DC390: DMA error (%02x)!\n", dstate); + return dstate; + } + if (dstate & DMA_XFER_DONE) + { + u32 residual, xferCnt; int ctr = 6000000; + if (! (DC390_read8 (DMA_Cmd) & READ_DIRECTION)) + { + do + { + DEBUG1(printk (KERN_DEBUG "DC390: read residual bytes ... \n")); + dstate = DC390_read8 (DMA_Status); + residual = DC390_read8 (CtcReg_Low) | DC390_read8 (CtcReg_Mid) << 8 | + DC390_read8 (CtcReg_High) << 16; + residual += DC390_read8 (Current_Fifo) & 0x1f; + } while (residual && ! (dstate & SCSI_INTERRUPT) && --ctr); + if (!ctr) printk (KERN_CRIT "DC390: dma_intr: DMA aborted unfinished: %06x bytes remain!!\n", DC390_read32 (DMA_Wk_ByteCntr)); + /* residual = ... */ + } + else + residual = 0; + + /* ??? */ + + xferCnt = pSRB->SGToBeXferLen - residual; + pSRB->SGBusAddr += xferCnt; + pSRB->TotalXferredLen += xferCnt; + pSRB->SGToBeXferLen = residual; +# ifdef DC390_DEBUG0 + printk (KERN_INFO "DC390: DMA: residual = %i, xfer = %i\n", + (unsigned int)residual, (unsigned int)xferCnt); +# endif + + DC390_write8 (DMA_Cmd, DMA_IDLE_CMD); + } + dc390_laststatus &= ~0xff000000; dc390_laststatus |= dstate << 24; + return dstate; +} +#endif + + +static void __inline__ +dc390_InvalidCmd(struct dc390_acb* pACB) +{ + if (pACB->pActiveDCB->pActiveSRB->SRBState & (SRB_START_ | SRB_MSGOUT)) + DC390_write8(ScsiCmd, CLEAR_FIFO_CMD); +} + + +static irqreturn_t __inline__ +DC390_Interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + struct dc390_acb *pACB = (struct dc390_acb*)dev_id; + struct dc390_dcb *pDCB; + struct dc390_srb *pSRB; + u8 sstatus=0; + u8 phase; + void (*stateV)( struct dc390_acb*, struct dc390_srb*, u8 *); + u8 istate, istatus; +#if DMA_INT + u8 dstatus; +#endif + + sstatus = DC390_read8 (Scsi_Status); + if( !(sstatus & INTERRUPT) ) + return IRQ_NONE; + + DEBUG1(printk (KERN_DEBUG "sstatus=%02x,", sstatus)); + +#if DMA_INT + spin_lock_irq(pACB->pScsiHost->host_lock); + dstatus = dc390_dma_intr (pACB); + spin_unlock_irq(pACB->pScsiHost->host_lock); + + DEBUG1(printk (KERN_DEBUG "dstatus=%02x,", dstatus)); + if (! (dstatus & SCSI_INTERRUPT)) + { + DEBUG0(printk (KERN_WARNING "DC390 Int w/o SCSI actions (only DMA?)\n")); + return IRQ_NONE; + } +#else + //DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT); + //dstatus = DC390_read8 (DMA_Status); + //DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT); +#endif + + spin_lock_irq(pACB->pScsiHost->host_lock); + + istate = DC390_read8 (Intern_State); + istatus = DC390_read8 (INT_Status); /* This clears Scsi_Status, Intern_State and INT_Status ! */ + + DEBUG1(printk (KERN_INFO "Istatus(Res,Inv,Dis,Serv,Succ,ReS,SelA,Sel)=%02x,",istatus)); + dc390_laststatus &= ~0x00ffffff; + dc390_laststatus |= /* dstatus<<24 | */ sstatus<<16 | istate<<8 | istatus; + + if (sstatus & ILLEGAL_OP_ERR) + { + printk ("DC390: Illegal Operation detected (%08x)!\n", dc390_laststatus); + dc390_dumpinfo (pACB, pACB->pActiveDCB, pACB->pActiveDCB->pActiveSRB); + } + + else if (istatus & INVALID_CMD) + { + printk ("DC390: Invalid Command detected (%08x)!\n", dc390_laststatus); + dc390_InvalidCmd( pACB ); + goto unlock; + } + + if (istatus & SCSI_RESET) + { + dc390_ScsiRstDetect( pACB ); + goto unlock; + } + + if (istatus & DISCONNECTED) + { + dc390_Disconnect( pACB ); + goto unlock; + } + + if (istatus & RESELECTED) + { + dc390_Reselect( pACB ); + goto unlock; + } + + else if (istatus & (SELECTED | SEL_ATTENTION)) + { + printk (KERN_ERR "DC390: Target mode not supported!\n"); + goto unlock; + } + + if (istatus & (SUCCESSFUL_OP|SERVICE_REQUEST) ) + { + pDCB = pACB->pActiveDCB; + if (!pDCB) + { + printk (KERN_ERR "DC390: Suc. op/ Serv. req: pActiveDCB = 0!\n"); + goto unlock; + } + pSRB = pDCB->pActiveSRB; + if( pDCB->DCBFlag & ABORT_DEV_ ) + dc390_EnableMsgOut_Abort (pACB, pSRB); + + phase = pSRB->ScsiPhase; + DEBUG1(printk (KERN_INFO "DC390: [%i]%s(0) (%02x)\n", phase, dc390_p0_str[phase], sstatus)); + stateV = (void *) dc390_phase0[phase]; + ( *stateV )( pACB, pSRB, &sstatus ); + + pSRB->ScsiPhase = sstatus & 7; + phase = (u8) sstatus & 7; + DEBUG1(printk (KERN_INFO "DC390: [%i]%s(1) (%02x)\n", phase, dc390_p1_str[phase], sstatus)); + stateV = (void *) dc390_phase1[phase]; + ( *stateV )( pACB, pSRB, &sstatus ); + } + + unlock: + spin_unlock_irq(pACB->pScsiHost->host_lock); + return IRQ_HANDLED; +} + +static irqreturn_t do_DC390_Interrupt( int irq, void *dev_id, struct pt_regs *regs) +{ + irqreturn_t ret; + DEBUG1(printk (KERN_INFO "DC390: Irq (%i) caught: ", irq)); + /* Locking is done in DC390_Interrupt */ + ret = DC390_Interrupt(irq, dev_id, regs); + DEBUG1(printk (".. IRQ returned\n")); + return ret; +} + +static void +dc390_DataOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus) +{ + u8 sstatus; + struct scatterlist *psgl; + u32 ResidCnt, xferCnt; + u8 dstate = 0; + + sstatus = *psstatus; + + if( !(pSRB->SRBState & SRB_XFERPAD) ) + { + if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR) ) + pSRB->SRBStatus |= PARITY_ERROR; + + if( sstatus & COUNT_2_ZERO ) + { + unsigned long timeout = jiffies + HZ; + + /* Function called from the ISR with the host_lock held and interrupts disabled */ + if (pSRB->SGToBeXferLen) + while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) { + spin_unlock_irq(pACB->pScsiHost->host_lock); + udelay(50); + spin_lock_irq(pACB->pScsiHost->host_lock); + } + if (!time_before(jiffies, timeout)) + printk (KERN_CRIT "DC390: Deadlock in DataOut_0: DMA aborted unfinished: %06x bytes remain!!\n", + DC390_read32 (DMA_Wk_ByteCntr)); + dc390_laststatus &= ~0xff000000; + dc390_laststatus |= dstate << 24; + pSRB->TotalXferredLen += pSRB->SGToBeXferLen; + pSRB->SGIndex++; + if( pSRB->SGIndex < pSRB->SGcount ) + { + pSRB->pSegmentList++; + psgl = pSRB->pSegmentList; + + pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl))); + pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl)); + } + else + pSRB->SGToBeXferLen = 0; + } + else + { + ResidCnt = (u32) DC390_read8 (Current_Fifo) & 0x1f; + ResidCnt |= (u32) DC390_read8 (CtcReg_High) << 16; + ResidCnt |= (u32) DC390_read8 (CtcReg_Mid) << 8; + ResidCnt += (u32) DC390_read8 (CtcReg_Low); + + xferCnt = pSRB->SGToBeXferLen - ResidCnt; + pSRB->SGBusAddr += xferCnt; + pSRB->TotalXferredLen += xferCnt; + pSRB->SGToBeXferLen = ResidCnt; + } + } + if ((*psstatus & 7) != SCSI_DATA_OUT) + { + DC390_write8 (DMA_Cmd, WRITE_DIRECTION+DMA_IDLE_CMD); /* | DMA_INT */ + DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD); + } +} + +static void +dc390_DataIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus) +{ + u8 sstatus, residual, bval; + struct scatterlist *psgl; + u32 ResidCnt, i; + unsigned long xferCnt; + u8 *ptr; + + sstatus = *psstatus; + + if( !(pSRB->SRBState & SRB_XFERPAD) ) + { + if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR)) + pSRB->SRBStatus |= PARITY_ERROR; + + if( sstatus & COUNT_2_ZERO ) + { + int dstate = 0; + unsigned long timeout = jiffies + HZ; + + /* Function called from the ISR with the host_lock held and interrupts disabled */ + if (pSRB->SGToBeXferLen) + while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) { + spin_unlock_irq(pACB->pScsiHost->host_lock); + udelay(50); + spin_lock_irq(pACB->pScsiHost->host_lock); + } + if (!time_before(jiffies, timeout)) { + printk (KERN_CRIT "DC390: Deadlock in DataIn_0: DMA aborted unfinished: %06x bytes remain!!\n", + DC390_read32 (DMA_Wk_ByteCntr)); + printk (KERN_CRIT "DC390: DataIn_0: DMA State: %i\n", dstate); + } + dc390_laststatus &= ~0xff000000; + dc390_laststatus |= dstate << 24; + DEBUG1(ResidCnt = ((unsigned long) DC390_read8 (CtcReg_High) << 16) \ + + ((unsigned long) DC390_read8 (CtcReg_Mid) << 8) \ + + ((unsigned long) DC390_read8 (CtcReg_Low))); + DEBUG1(printk (KERN_DEBUG "Count_2_Zero (ResidCnt=%i,ToBeXfer=%li),", ResidCnt, pSRB->SGToBeXferLen)); + + DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD); /* | DMA_INT */ + + pSRB->TotalXferredLen += pSRB->SGToBeXferLen; + pSRB->SGIndex++; + if( pSRB->SGIndex < pSRB->SGcount ) + { + pSRB->pSegmentList++; + psgl = pSRB->pSegmentList; + + pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl))); + pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl)); + } + else + pSRB->SGToBeXferLen = 0; + } + else /* phase changed */ + { + residual = 0; + bval = DC390_read8 (Current_Fifo); + while( bval & 0x1f ) + { + DEBUG1(printk (KERN_DEBUG "Check for residuals,")); + if( (bval & 0x1f) == 1 ) + { + for(i=0; i < 0x100; i++) + { + bval = DC390_read8 (Current_Fifo); + if( !(bval & 0x1f) ) + goto din_1; + else if( i == 0x0ff ) + { + residual = 1; /* ;1 residual byte */ + goto din_1; + } + } + } + else + bval = DC390_read8 (Current_Fifo); + } +din_1: + DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_BLAST_CMD); + for (i = 0xa000; i; i--) + { + bval = DC390_read8 (DMA_Status); + if (bval & BLAST_COMPLETE) + break; + } + /* It seems a DMA Blast abort isn't that bad ... */ + if (!i) printk (KERN_ERR "DC390: DMA Blast aborted unfinished!\n"); + //DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD); /* | DMA_INT */ + dc390_laststatus &= ~0xff000000; dc390_laststatus |= bval << 24; + + DEBUG1(printk (KERN_DEBUG "Blast: Read %i times DMA_Status %02x", 0xa000-i, bval)); + ResidCnt = (u32) DC390_read8 (CtcReg_High); + ResidCnt <<= 8; + ResidCnt |= (u32) DC390_read8 (CtcReg_Mid); + ResidCnt <<= 8; + ResidCnt |= (u32) DC390_read8 (CtcReg_Low); + + xferCnt = pSRB->SGToBeXferLen - ResidCnt; + pSRB->SGBusAddr += xferCnt; + pSRB->TotalXferredLen += xferCnt; + pSRB->SGToBeXferLen = ResidCnt; + + if( residual ) + { + bval = DC390_read8 (ScsiFifo); /* get one residual byte */ + ptr = (u8 *) bus_to_virt( pSRB->SGBusAddr ); + *ptr = bval; + pSRB->SGBusAddr++; xferCnt++; + pSRB->TotalXferredLen++; + pSRB->SGToBeXferLen--; + } + DEBUG1(printk (KERN_DEBUG "Xfered: %li, Total: %li, Remaining: %li\n", xferCnt,\ + pSRB->TotalXferredLen, pSRB->SGToBeXferLen)); + + } + } + if ((*psstatus & 7) != SCSI_DATA_IN) + { + DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD); + DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD); /* | DMA_INT */ + } +} + +static void +dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus) +{ +} + +static void +dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus) +{ + + pSRB->TargetStatus = DC390_read8 (ScsiFifo); + //udelay (1); + pSRB->EndMessage = DC390_read8 (ScsiFifo); /* get message */ + + *psstatus = SCSI_NOP0; + pSRB->SRBState = SRB_COMPLETED; + DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD); +} + +static void +dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus) +{ + if( pSRB->SRBState & (SRB_UNEXPECT_RESEL+SRB_ABORT_SENT) ) + *psstatus = SCSI_NOP0; + //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD); +} + + +static void __inline__ +dc390_reprog (struct dc390_acb* pACB, struct dc390_dcb* pDCB) +{ + DC390_write8 (Sync_Period, pDCB->SyncPeriod); + DC390_write8 (Sync_Offset, pDCB->SyncOffset); + DC390_write8 (CtrlReg3, pDCB->CtrlR3); + DC390_write8 (CtrlReg4, pDCB->CtrlR4); + dc390_SetXferRate (pACB, pDCB); +} + + +#ifdef DC390_DEBUG0 +static void +dc390_printMsg (u8 *MsgBuf, u8 len) +{ + int i; + printk (" %02x", MsgBuf[0]); + for (i = 1; i < len; i++) + printk (" %02x", MsgBuf[i]); + printk ("\n"); +} +#endif + +#define DC390_ENABLE_MSGOUT DC390_write8 (ScsiCmd, SET_ATN_CMD) + +/* reject_msg */ +static void __inline__ +dc390_MsgIn_reject (struct dc390_acb* pACB, struct dc390_srb* pSRB) +{ + pSRB->MsgOutBuf[0] = MESSAGE_REJECT; + pSRB->MsgCnt = 1; + DC390_ENABLE_MSGOUT; + DEBUG0 (printk (KERN_INFO "DC390: Reject message\n")); +} + +/* abort command */ +static void +dc390_EnableMsgOut_Abort ( struct dc390_acb* pACB, struct dc390_srb* pSRB ) +{ + pSRB->MsgOutBuf[0] = ABORT; + pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT; + pSRB->pSRBDCB->DCBFlag &= ~ABORT_DEV_; +} + +static struct dc390_srb* +dc390_MsgIn_QTag (struct dc390_acb* pACB, struct dc390_dcb* pDCB, s8 tag) +{ + struct dc390_srb* pSRB = pDCB->pGoingSRB; + + if (pSRB) + { + struct scsi_cmnd *scmd = scsi_find_tag(pSRB->pcmd->device, tag); + pSRB = (struct dc390_srb *)scmd->host_scribble; + + if (pDCB->DCBFlag & ABORT_DEV_) + { + pSRB->SRBState = SRB_ABORT_SENT; + dc390_EnableMsgOut_Abort( pACB, pSRB ); + } + + if (!(pSRB->SRBState & SRB_DISCONNECT)) + goto mingx0; + + pDCB->pActiveSRB = pSRB; + pSRB->SRBState = SRB_DATA_XFER; + } + else + { + mingx0: + pSRB = pACB->pTmpSRB; + pSRB->SRBState = SRB_UNEXPECT_RESEL; + pDCB->pActiveSRB = pSRB; + pSRB->MsgOutBuf[0] = ABORT_TAG; + pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT; + } + return pSRB; +} + + +/* set async transfer mode */ +static void +dc390_MsgIn_set_async (struct dc390_acb* pACB, struct dc390_srb* pSRB) +{ + struct dc390_dcb* pDCB = pSRB->pSRBDCB; + if (!(pSRB->SRBState & DO_SYNC_NEGO)) + printk (KERN_INFO "DC390: Target %i initiates Non-Sync?\n", pDCB->TargetID); + pSRB->SRBState &= ~DO_SYNC_NEGO; + pDCB->SyncMode &= ~(SYNC_ENABLE+SYNC_NEGO_DONE); + pDCB->SyncPeriod = 0; + pDCB->SyncOffset = 0; + //pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */ + pDCB->CtrlR3 = FAST_CLK; /* fast clock / normal scsi */ + pDCB->CtrlR4 &= 0x3f; + pDCB->CtrlR4 |= pACB->glitch_cfg; /* glitch eater */ + dc390_reprog (pACB, pDCB); +} + +/* set sync transfer mode */ +static void +dc390_MsgIn_set_sync (struct dc390_acb* pACB, struct dc390_srb* pSRB) +{ + u8 bval; + u16 wval, wval1; + struct dc390_dcb* pDCB = pSRB->pSRBDCB; + u8 oldsyncperiod = pDCB->SyncPeriod; + u8 oldsyncoffset = pDCB->SyncOffset; + + if (!(pSRB->SRBState & DO_SYNC_NEGO)) + { + printk (KERN_INFO "DC390: Target %i initiates Sync: %ins %i ... answer ...\n", + pDCB->TargetID, pSRB->MsgInBuf[3]<<2, pSRB->MsgInBuf[4]); + + /* reject */ + //dc390_MsgIn_reject (pACB, pSRB); + //return dc390_MsgIn_set_async (pACB, pSRB); + + /* Reply with corrected SDTR Message */ + if (pSRB->MsgInBuf[4] > 15) + { + printk (KERN_INFO "DC390: Lower Sync Offset to 15\n"); + pSRB->MsgInBuf[4] = 15; + } + if (pSRB->MsgInBuf[3] < pDCB->NegoPeriod) + { + printk (KERN_INFO "DC390: Set sync nego period to %ins\n", pDCB->NegoPeriod << 2); + pSRB->MsgInBuf[3] = pDCB->NegoPeriod; + } + memcpy (pSRB->MsgOutBuf, pSRB->MsgInBuf, 5); + pSRB->MsgCnt = 5; + DC390_ENABLE_MSGOUT; + } + + pSRB->SRBState &= ~DO_SYNC_NEGO; + pDCB->SyncMode |= SYNC_ENABLE+SYNC_NEGO_DONE; + pDCB->SyncOffset &= 0x0f0; + pDCB->SyncOffset |= pSRB->MsgInBuf[4]; + pDCB->NegoPeriod = pSRB->MsgInBuf[3]; + + wval = (u16) pSRB->MsgInBuf[3]; + wval = wval << 2; wval -= 3; wval1 = wval / 25; /* compute speed */ + if( (wval1 * 25) != wval) wval1++; + bval = FAST_CLK+FAST_SCSI; /* fast clock / fast scsi */ + + pDCB->CtrlR4 &= 0x3f; /* Glitch eater: 12ns less than normal */ + if (pACB->glitch_cfg != NS_TO_GLITCH(0)) + pDCB->CtrlR4 |= NS_TO_GLITCH(((GLITCH_TO_NS(pACB->glitch_cfg)) - 1)); + else + pDCB->CtrlR4 |= NS_TO_GLITCH(0); + if (wval1 < 4) pDCB->CtrlR4 |= NS_TO_GLITCH(0); /* Ultra */ + + if (wval1 >= 8) + { + wval1--; /* Timing computation differs by 1 from FAST_SCSI */ + bval = FAST_CLK; /* fast clock / normal scsi */ + pDCB->CtrlR4 |= pACB->glitch_cfg; /* glitch eater */ + } + + pDCB->CtrlR3 = bval; + pDCB->SyncPeriod = (u8)wval1; + + if ((oldsyncperiod != wval1 || oldsyncoffset != pDCB->SyncOffset) && pDCB->TargetLUN == 0) + { + if (! (bval & FAST_SCSI)) wval1++; + printk (KERN_INFO "DC390: Target %i: Sync transfer %i.%1i MHz, Offset %i\n", pDCB->TargetID, + 40/wval1, ((40%wval1)*10+wval1/2)/wval1, pDCB->SyncOffset & 0x0f); + } + + dc390_reprog (pACB, pDCB); +} + + +/* handle RESTORE_PTR */ +/* I presume, this command is already mapped, so, have to remap. */ +static void +dc390_restore_ptr (struct dc390_acb* pACB, struct dc390_srb* pSRB) +{ + struct scsi_cmnd *pcmd = pSRB->pcmd; + struct scatterlist *psgl; + pSRB->TotalXferredLen = 0; + pSRB->SGIndex = 0; + if (pcmd->use_sg) { + pSRB->pSegmentList = (struct scatterlist *)pcmd->request_buffer; + psgl = pSRB->pSegmentList; + //dc390_pci_sync(pSRB); + + while (pSRB->TotalXferredLen + (unsigned long) sg_dma_len(psgl) < pSRB->Saved_Ptr) + { + pSRB->TotalXferredLen += (unsigned long) sg_dma_len(psgl); + pSRB->SGIndex++; + if( pSRB->SGIndex < pSRB->SGcount ) + { + pSRB->pSegmentList++; + psgl = pSRB->pSegmentList; + pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl))); + pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl)); + } + else + pSRB->SGToBeXferLen = 0; + } + pSRB->SGToBeXferLen -= (pSRB->Saved_Ptr - pSRB->TotalXferredLen); + pSRB->SGBusAddr += (pSRB->Saved_Ptr - pSRB->TotalXferredLen); + printk (KERN_INFO "DC390: Pointer restored. Segment %i, Total %li, Bus %08lx\n", + pSRB->SGIndex, pSRB->Saved_Ptr, pSRB->SGBusAddr); + + } else if(pcmd->request_buffer) { + //dc390_pci_sync(pSRB); + + sg_dma_len(&pSRB->Segmentx) = pcmd->request_bufflen - pSRB->Saved_Ptr; + pSRB->SGcount = 1; + pSRB->pSegmentList = (struct scatterlist *) &pSRB->Segmentx; + } else { + pSRB->SGcount = 0; + printk (KERN_INFO "DC390: RESTORE_PTR message for Transfer without Scatter-Gather ??\n"); + } + + pSRB->TotalXferredLen = pSRB->Saved_Ptr; +} + + +/* According to the docs, the AM53C974 reads the message and + * generates a Successful Operation IRQ before asserting ACK for + * the last byte (how does it know whether it's the last ?) */ +/* The old code handled it in another way, indicating, that on + * every message byte an IRQ is generated and every byte has to + * be manually ACKed. Hmmm ? (KG, 98/11/28) */ +/* The old implementation was correct. Sigh! */ + +/* Check if the message is complete */ +static u8 __inline__ +dc390_MsgIn_complete (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; +} + + + +/* read and eval received messages */ +static void +dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus) +{ + struct dc390_dcb* pDCB = pACB->pActiveDCB; + + /* Read the msg */ + + pSRB->MsgInBuf[pACB->MsgLen++] = DC390_read8 (ScsiFifo); + //pSRB->SRBState = 0; + + /* Msg complete ? */ + if (dc390_MsgIn_complete (pSRB->MsgInBuf, pACB->MsgLen)) + { + DEBUG0 (printk (KERN_INFO "DC390: MsgIn:"); dc390_printMsg (pSRB->MsgInBuf, pACB->MsgLen)); + /* Now eval the msg */ + switch (pSRB->MsgInBuf[0]) + { + case DISCONNECT: + pSRB->SRBState = SRB_DISCONNECT; break; + + case SIMPLE_QUEUE_TAG: + case HEAD_OF_QUEUE_TAG: + case ORDERED_QUEUE_TAG: + pSRB = dc390_MsgIn_QTag (pACB, pDCB, pSRB->MsgInBuf[1]); + break; + + case MESSAGE_REJECT: + DC390_write8 (ScsiCmd, RESET_ATN_CMD); + pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */ + if( pSRB->SRBState & DO_SYNC_NEGO) + dc390_MsgIn_set_async (pACB, pSRB); + break; + + case EXTENDED_MESSAGE: + /* reject every extended msg but SDTR */ + if (pSRB->MsgInBuf[1] != 3 || pSRB->MsgInBuf[2] != EXTENDED_SDTR) + dc390_MsgIn_reject (pACB, pSRB); + else + { + if (pSRB->MsgInBuf[3] == 0 || pSRB->MsgInBuf[4] == 0) + dc390_MsgIn_set_async (pACB, pSRB); + else + dc390_MsgIn_set_sync (pACB, pSRB); + } + + // nothing has to be done + case COMMAND_COMPLETE: break; + + // SAVE POINTER may be ignored as we have the struct dc390_srb* associated with the + // scsi command. Thanks, Gerard, for pointing it out. + case SAVE_POINTERS: + pSRB->Saved_Ptr = pSRB->TotalXferredLen; + break; + // The device might want to restart transfer with a RESTORE + case RESTORE_POINTERS: + DEBUG0(printk ("DC390: RESTORE POINTER message received ... try to handle\n")); + dc390_restore_ptr (pACB, pSRB); + break; + + // reject unknown messages + default: dc390_MsgIn_reject (pACB, pSRB); + } + + /* Clear counter and MsgIn state */ + pSRB->SRBState &= ~SRB_MSGIN; + pACB->MsgLen = 0; + } + + *psstatus = SCSI_NOP0; + DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD); + //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD); +} + + +static void +dc390_DataIO_Comm( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 ioDir) +{ + struct scatterlist *psgl; + unsigned long lval; + struct dc390_dcb* pDCB = pACB->pActiveDCB; + + if (pSRB == pACB->pTmpSRB) + { + if (pDCB) + printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (%02i-%i)\n", pDCB->TargetID, pDCB->TargetLUN); + else + printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (DCB 0!)\n"); + + /* Try to recover - some broken disks react badly to tagged INQUIRY */ + if (pDCB && pACB->scan_devices && pDCB->GoingSRBCnt == 1) { + pSRB = pDCB->pGoingSRB; + pDCB->pActiveSRB = pSRB; + } else { + pSRB->pSRBDCB = pDCB; + dc390_EnableMsgOut_Abort(pACB, pSRB); + if (pDCB) + pDCB->DCBFlag |= ABORT_DEV; + return; + } + } + + if( pSRB->SGIndex < pSRB->SGcount ) + { + DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir /* | DMA_INT */); + if( !pSRB->SGToBeXferLen ) + { + psgl = pSRB->pSegmentList; + pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl))); + pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl)); + DEBUG1(printk (KERN_DEBUG " DC390: Next SG segment.")); + } + lval = pSRB->SGToBeXferLen; + DEBUG1(printk (KERN_DEBUG " DC390: Start transfer: %li bytes (address %08lx)\n", lval, pSRB->SGBusAddr)); + DC390_write8 (CtcReg_Low, (u8) lval); + lval >>= 8; + DC390_write8 (CtcReg_Mid, (u8) lval); + lval >>= 8; + DC390_write8 (CtcReg_High, (u8) lval); + + DC390_write32 (DMA_XferCnt, pSRB->SGToBeXferLen); + DC390_write32 (DMA_XferAddr, pSRB->SGBusAddr); + + //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir); /* | DMA_INT; */ + pSRB->SRBState = SRB_DATA_XFER; + + DC390_write8 (ScsiCmd, DMA_COMMAND+INFO_XFER_CMD); + + DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir | DMA_INT); + //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT)); + //DEBUG1(printk (KERN_DEBUG "DC390: DMA_Status: %02x\n", DC390_read8 (DMA_Status))); + //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT)); + } + else /* xfer pad */ + { + if( pSRB->SGcount ) + { + pSRB->AdaptStatus = H_OVER_UNDER_RUN; + pSRB->SRBStatus |= OVER_RUN; + DEBUG0(printk (KERN_WARNING " DC390: Overrun -")); + } + DEBUG0(printk (KERN_WARNING " Clear transfer pad \n")); + DC390_write8 (CtcReg_Low, 0); + DC390_write8 (CtcReg_Mid, 0); + DC390_write8 (CtcReg_High, 0); + + pSRB->SRBState |= SRB_XFERPAD; + DC390_write8 (ScsiCmd, DMA_COMMAND+XFER_PAD_BYTE); +/* + DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir); // | DMA_INT; + DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir | DMA_INT); +*/ + } +} + + +static void +dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus) +{ + dc390_DataIO_Comm (pACB, pSRB, WRITE_DIRECTION); +} + +static void +dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus) +{ + dc390_DataIO_Comm (pACB, pSRB, READ_DIRECTION); +} + +static void +dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus) +{ + struct dc390_dcb* pDCB; + u8 i, cnt; + u8 *ptr; + + DC390_write8 (ScsiCmd, RESET_ATN_CMD); + DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD); + if( !(pSRB->SRBFlag & AUTO_REQSENSE) ) + { + cnt = (u8) pSRB->pcmd->cmd_len; + ptr = (u8 *) pSRB->pcmd->cmnd; + for(i=0; i < cnt; i++) + DC390_write8 (ScsiFifo, *(ptr++)); + } + else + { + DC390_write8 (ScsiFifo, REQUEST_SENSE); + pDCB = pACB->pActiveDCB; + DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5); + DC390_write8 (ScsiFifo, 0); + DC390_write8 (ScsiFifo, 0); + DC390_write8 (ScsiFifo, sizeof(pSRB->pcmd->sense_buffer)); + DC390_write8 (ScsiFifo, 0); + DEBUG0(printk(KERN_DEBUG "DC390: AutoReqSense (CmndPhase)!\n")); + } + pSRB->SRBState = SRB_COMMAND; + DC390_write8 (ScsiCmd, INFO_XFER_CMD); +} + +static void +dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus) +{ + DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD); + pSRB->SRBState = SRB_STATUS; + DC390_write8 (ScsiCmd, INITIATOR_CMD_CMPLTE); + //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD); +} + +static void +dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus) +{ + u8 bval, i, cnt; + u8 *ptr; + struct dc390_dcb* pDCB; + + DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD); + pDCB = pACB->pActiveDCB; + if( !(pSRB->SRBState & SRB_MSGOUT) ) + { + cnt = pSRB->MsgCnt; + if( cnt ) + { + ptr = (u8 *) pSRB->MsgOutBuf; + for(i=0; i < cnt; i++) + DC390_write8 (ScsiFifo, *(ptr++)); + pSRB->MsgCnt = 0; + if( (pDCB->DCBFlag & ABORT_DEV_) && + (pSRB->MsgOutBuf[0] == ABORT) ) + pSRB->SRBState = SRB_ABORT_SENT; + } + else + { + bval = ABORT; /* ??? MSG_NOP */ + if( (pSRB->pcmd->cmnd[0] == INQUIRY ) || + (pSRB->pcmd->cmnd[0] == REQUEST_SENSE) || + (pSRB->SRBFlag & AUTO_REQSENSE) ) + { + if( pDCB->SyncMode & SYNC_ENABLE ) + goto mop1; + } + DC390_write8 (ScsiFifo, bval); + } + DC390_write8 (ScsiCmd, INFO_XFER_CMD); + } + else + { +mop1: + printk (KERN_ERR "DC390: OLD Sync Nego code triggered! (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN); + DC390_write8 (ScsiFifo, EXTENDED_MESSAGE); + DC390_write8 (ScsiFifo, 3); /* ;length of extended msg */ + DC390_write8 (ScsiFifo, EXTENDED_SDTR); /* ; sync nego */ + DC390_write8 (ScsiFifo, pDCB->NegoPeriod); + if (pDCB->SyncOffset & 0x0f) + DC390_write8 (ScsiFifo, pDCB->SyncOffset); + else + DC390_write8 (ScsiFifo, SYNC_NEGO_OFFSET); + pSRB->SRBState |= DO_SYNC_NEGO; + DC390_write8 (ScsiCmd, INFO_XFER_CMD); + } +} + +static void +dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus) +{ + DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD); + if( !(pSRB->SRBState & SRB_MSGIN) ) + { + pSRB->SRBState &= ~SRB_DISCONNECT; + pSRB->SRBState |= SRB_MSGIN; + } + DC390_write8 (ScsiCmd, INFO_XFER_CMD); + //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD); +} + +static void +dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus) +{ +} + +static void +dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus) +{ +} + + +static void +dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB ) +{ + u8 bval, i, cnt; + struct dc390_dcb* ptr; + + if( !(pDCB->TargetLUN) ) + { + if( !pACB->scan_devices ) + { + ptr = pACB->pLinkDCB; + cnt = pACB->DCBCnt; + bval = pDCB->TargetID; + for(i=0; i<cnt; i++) + { + if( ptr->TargetID == bval ) + { + ptr->SyncPeriod = pDCB->SyncPeriod; + ptr->SyncOffset = pDCB->SyncOffset; + ptr->CtrlR3 = pDCB->CtrlR3; + ptr->CtrlR4 = pDCB->CtrlR4; + ptr->SyncMode = pDCB->SyncMode; + } + ptr = ptr->pNextDCB; + } + } + } + return; +} + + +static void +dc390_Disconnect( struct dc390_acb* pACB ) +{ + struct dc390_dcb *pDCB; + struct dc390_srb *pSRB, *psrb; + u8 i, cnt; + + DEBUG0(printk(KERN_INFO "DISC,")); + + if (!pACB->Connected) printk(KERN_ERR "DC390: Disconnect not-connected bus?\n"); + pACB->Connected = 0; + pDCB = pACB->pActiveDCB; + if (!pDCB) + { + DEBUG0(printk(KERN_ERR "ACB:%p->ActiveDCB:%p IOPort:%04x IRQ:%02x !\n",\ + pACB, pDCB, pACB->IOPortBase, pACB->IRQLevel)); + mdelay(400); + DC390_read8 (INT_Status); /* Reset Pending INT */ + DC390_write8 (ScsiCmd, EN_SEL_RESEL); + return; + } + DC390_write8 (ScsiCmd, EN_SEL_RESEL); + pSRB = pDCB->pActiveSRB; + pACB->pActiveDCB = NULL; + pSRB->ScsiPhase = SCSI_NOP0; + if( pSRB->SRBState & SRB_UNEXPECT_RESEL ) + pSRB->SRBState = 0; + else if( pSRB->SRBState & SRB_ABORT_SENT ) + { + pDCB->TagMask = 0; + pDCB->DCBFlag = 0; + cnt = pDCB->GoingSRBCnt; + pDCB->GoingSRBCnt = 0; + pSRB = pDCB->pGoingSRB; + for( i=0; i < cnt; i++) + { + psrb = pSRB->pNextSRB; + dc390_Free_insert (pACB, pSRB); + pSRB = psrb; + } + pDCB->pGoingSRB = NULL; + } + else + { + if( (pSRB->SRBState & (SRB_START_+SRB_MSGOUT)) || + !(pSRB->SRBState & (SRB_DISCONNECT+SRB_COMPLETED)) ) + { /* Selection time out */ + pSRB->TargetStatus = SCSI_STAT_SEL_TIMEOUT; + goto disc1; + } + else if (!(pSRB->SRBState & SRB_DISCONNECT) && (pSRB->SRBState & SRB_COMPLETED)) + { +disc1: + dc390_freetag (pDCB, pSRB); + pDCB->pActiveSRB = NULL; + pSRB->SRBState = SRB_FREE; + dc390_SRBdone( pACB, pDCB, pSRB); + } + } + pACB->MsgLen = 0; +} + + +static void +dc390_Reselect( struct dc390_acb* pACB ) +{ + struct dc390_dcb* pDCB; + struct dc390_srb* pSRB; + u8 id, lun; + + DEBUG0(printk(KERN_INFO "RSEL,")); + pACB->Connected = 1; + pDCB = pACB->pActiveDCB; + if( pDCB ) + { /* Arbitration lost but Reselection won */ + DEBUG0(printk ("DC390: (ActiveDCB != 0: Arb. lost but resel. won)!\n")); + pSRB = pDCB->pActiveSRB; + if( !( pACB->scan_devices ) ) + { + struct scsi_cmnd *pcmd = pSRB->pcmd; + pcmd->resid = pcmd->request_bufflen; + SET_RES_DID(pcmd->result, DID_SOFT_ERROR); + dc390_Going_remove(pDCB, pSRB); + dc390_Free_insert(pACB, pSRB); + pcmd->scsi_done (pcmd); + DEBUG0(printk(KERN_DEBUG"DC390: Return SRB %p to free\n", pSRB)); + } + } + /* Get ID */ + lun = DC390_read8 (ScsiFifo); + DEBUG0(printk ("Dev %02x,", lun)); + if (!(lun & (1 << pACB->pScsiHost->this_id))) + printk (KERN_ERR "DC390: Reselection must select host adapter: %02x!\n", lun); + else + lun ^= 1 << pACB->pScsiHost->this_id; /* Mask AdapterID */ + id = 0; while (lun >>= 1) id++; + /* Get LUN */ + lun = DC390_read8 (ScsiFifo); + if (!(lun & IDENTIFY_BASE)) printk (KERN_ERR "DC390: Resel: Expect identify message!\n"); + lun &= 7; + DEBUG0(printk ("(%02i-%i),", id, lun)); + pDCB = dc390_findDCB (pACB, id, lun); + if (!pDCB) + { + printk (KERN_ERR "DC390: Reselect from non existing device (%02i-%i)\n", + id, lun); + return; + } + pACB->pActiveDCB = pDCB; + /* TagQ: We expect a message soon, so never mind the exact SRB */ + if( pDCB->SyncMode & EN_TAG_QUEUEING ) + { + pSRB = pACB->pTmpSRB; + pDCB->pActiveSRB = pSRB; + } + else + { + pSRB = pDCB->pActiveSRB; + if( !pSRB || !(pSRB->SRBState & SRB_DISCONNECT) ) + { + pSRB= pACB->pTmpSRB; + pSRB->SRBState = SRB_UNEXPECT_RESEL; + printk (KERN_ERR "DC390: Reselect without outstanding cmnd (%02i-%i)\n", + id, lun); + pDCB->pActiveSRB = pSRB; + dc390_EnableMsgOut_Abort ( pACB, pSRB ); + } + else + { + if( pDCB->DCBFlag & ABORT_DEV_ ) + { + pSRB->SRBState = SRB_ABORT_SENT; + printk (KERN_INFO "DC390: Reselect: Abort (%02i-%i)\n", + id, lun); + dc390_EnableMsgOut_Abort( pACB, pSRB ); + } + else + pSRB->SRBState = SRB_DATA_XFER; + } + } + + DEBUG1(printk (KERN_DEBUG "Resel SRB(%p): TagNum (%02x)\n", pSRB, pSRB->TagNumber)); + pSRB->ScsiPhase = SCSI_NOP0; + DC390_write8 (Scsi_Dest_ID, pDCB->TargetID); + DC390_write8 (Sync_Period, pDCB->SyncPeriod); + DC390_write8 (Sync_Offset, pDCB->SyncOffset); + DC390_write8 (CtrlReg1, pDCB->CtrlR1); + DC390_write8 (CtrlReg3, pDCB->CtrlR3); + DC390_write8 (CtrlReg4, pDCB->CtrlR4); /* ; Glitch eater */ + DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD); /* ;to release the /ACK signal */ +} + +static int __inline__ +dc390_RequestSense(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB) +{ + struct scsi_cmnd *pcmd; + + pcmd = pSRB->pcmd; + + REMOVABLEDEBUG(printk(KERN_INFO "DC390: RequestSense(Cmd %02x, Id %02x, LUN %02x)\n",\ + pcmd->cmnd[0], pDCB->TargetID, pDCB->TargetLUN)); + + pSRB->SRBFlag |= AUTO_REQSENSE; + pSRB->SavedSGCount = pcmd->use_sg; + pSRB->SavedTotXLen = pSRB->TotalXferredLen; + pSRB->AdaptStatus = 0; + pSRB->TargetStatus = 0; /* CHECK_CONDITION<<1; */ + + /* We are called from SRBdone, original PCI mapping has been removed + * already, new one is set up from StartSCSI */ + pSRB->SGIndex = 0; + + pSRB->TotalXferredLen = 0; + pSRB->SGToBeXferLen = 0; + return dc390_StartSCSI(pACB, pDCB, pSRB); +} + + +static void +dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB ) +{ + u8 status; + struct scsi_cmnd *pcmd; + + pcmd = pSRB->pcmd; + /* KG: Moved pci_unmap here */ + dc390_pci_unmap(pSRB); + + status = pSRB->TargetStatus; + + DEBUG0(printk (" SRBdone (%02x,%08x), SRB %p, pid %li\n", status, pcmd->result,\ + pSRB, pcmd->pid)); + if(pSRB->SRBFlag & AUTO_REQSENSE) + { /* Last command was a Request Sense */ + pSRB->SRBFlag &= ~AUTO_REQSENSE; + pSRB->AdaptStatus = 0; + pSRB->TargetStatus = CHECK_CONDITION << 1; + + //pcmd->result = MK_RES(DRIVER_SENSE,DID_OK,0,status); + if (status == (CHECK_CONDITION << 1)) + pcmd->result = MK_RES_LNX(0, DID_BAD_TARGET, 0, /*CHECK_CONDITION*/0); + else /* Retry */ + { + if( pSRB->pcmd->cmnd[0] == TEST_UNIT_READY /* || pSRB->pcmd->cmnd[0] == START_STOP */) + { + /* Don't retry on TEST_UNIT_READY */ + pcmd->result = MK_RES_LNX(DRIVER_SENSE,DID_OK,0,CHECK_CONDITION); + REMOVABLEDEBUG(printk(KERN_INFO "Cmd=%02x, Result=%08x, XferL=%08x\n",pSRB->pcmd->cmnd[0],\ + (u32) pcmd->result, (u32) pSRB->TotalXferredLen)); + } else { + SET_RES_DRV(pcmd->result, DRIVER_SENSE); + pcmd->use_sg = pSRB->SavedSGCount; + //pSRB->ScsiCmdLen = (u8) (pSRB->Segment1[0] >> 8); + DEBUG0 (printk ("DC390: RETRY pid %li (%02x), target %02i-%02i\n", pcmd->pid, pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun)); + pSRB->TotalXferredLen = 0; + SET_RES_DID(pcmd->result, DID_SOFT_ERROR); + } + } + goto cmd_done; + } + if( status ) + { + if( status_byte(status) == CHECK_CONDITION ) + { + if (dc390_RequestSense(pACB, pDCB, pSRB)) { + SET_RES_DID(pcmd->result, DID_ERROR); + goto cmd_done; + } + return; + } + else if( status_byte(status) == QUEUE_FULL ) + { + scsi_track_queue_full(pcmd->device, pDCB->GoingSRBCnt - 1); + pcmd->use_sg = pSRB->SavedSGCount; + DEBUG0 (printk ("DC390: RETRY pid %li (%02x), target %02i-%02i\n", pcmd->pid, pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun)); + pSRB->TotalXferredLen = 0; + SET_RES_DID(pcmd->result, DID_SOFT_ERROR); + } + else if(status == SCSI_STAT_SEL_TIMEOUT) + { + pSRB->AdaptStatus = H_SEL_TIMEOUT; + pSRB->TargetStatus = 0; + pcmd->result = MK_RES(0,DID_NO_CONNECT,0,0); + /* Devices are removed below ... */ + } + else if (status_byte(status) == BUSY && + (pcmd->cmnd[0] == TEST_UNIT_READY || pcmd->cmnd[0] == INQUIRY) && + pACB->scan_devices) + { + pSRB->AdaptStatus = 0; + pSRB->TargetStatus = status; + pcmd->result = MK_RES(0,0,pSRB->EndMessage,/*status*/0); + } + else + { /* Another error */ + pSRB->TotalXferredLen = 0; + SET_RES_DID(pcmd->result, DID_SOFT_ERROR); + goto cmd_done; + } + } + else + { /* Target status == 0 */ + status = pSRB->AdaptStatus; + if(status & H_OVER_UNDER_RUN) + { + pSRB->TargetStatus = 0; + SET_RES_DID(pcmd->result,DID_OK); + SET_RES_MSG(pcmd->result,pSRB->EndMessage); + } + else if( pSRB->SRBStatus & PARITY_ERROR) + { + //pcmd->result = MK_RES(0,DID_PARITY,pSRB->EndMessage,0); + SET_RES_DID(pcmd->result,DID_PARITY); + SET_RES_MSG(pcmd->result,pSRB->EndMessage); + } + else /* No error */ + { + pSRB->AdaptStatus = 0; + pSRB->TargetStatus = 0; + SET_RES_DID(pcmd->result,DID_OK); + } + } + +cmd_done: + pcmd->resid = pcmd->request_bufflen - pSRB->TotalXferredLen; + + dc390_Going_remove (pDCB, pSRB); + /* Add to free list */ + dc390_Free_insert (pACB, pSRB); + + DEBUG0(printk (KERN_DEBUG "DC390: SRBdone: done pid %li\n", pcmd->pid)); + pcmd->scsi_done (pcmd); + + return; +} + + +/* Remove all SRBs from Going list and inform midlevel */ +static void +dc390_DoingSRB_Done(struct dc390_acb* pACB, struct scsi_cmnd *cmd) +{ + struct dc390_dcb *pDCB, *pdcb; + struct dc390_srb *psrb, *psrb2; + int i; + struct scsi_cmnd *pcmd; + + pDCB = pACB->pLinkDCB; + pdcb = pDCB; + if (! pdcb) return; + do + { + psrb = pdcb->pGoingSRB; + for (i = 0; i < pdcb->GoingSRBCnt; i++) + { + psrb2 = psrb->pNextSRB; + pcmd = psrb->pcmd; + dc390_Free_insert (pACB, psrb); + psrb = psrb2; + } + pdcb->GoingSRBCnt = 0; + pdcb->pGoingSRB = NULL; + pdcb->TagMask = 0; + pdcb = pdcb->pNextDCB; + } while( pdcb != pDCB ); +} + + +static void +dc390_ResetSCSIBus( struct dc390_acb* pACB ) +{ + //DC390_write8 (ScsiCmd, RST_DEVICE_CMD); + //udelay (250); + //DC390_write8 (ScsiCmd, NOP_CMD); + + DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD); + DC390_write8 (DMA_Cmd, DMA_IDLE_CMD); + DC390_write8 (ScsiCmd, RST_SCSI_BUS_CMD); + pACB->Connected = 0; + + return; +} + +static void +dc390_ScsiRstDetect( struct dc390_acb* pACB ) +{ + printk ("DC390: Rst_Detect: laststat = %08x\n", dc390_laststatus); + //DEBUG0(printk(KERN_INFO "RST_DETECT,")); + + DC390_write8 (DMA_Cmd, DMA_IDLE_CMD); + /* Unlock before ? */ + /* delay half a second */ + udelay (1000); + DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD); + pACB->pScsiHost->last_reset = jiffies + 5*HZ/2 + + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY]; + pACB->Connected = 0; + + if( pACB->ACBFlag & RESET_DEV ) + pACB->ACBFlag |= RESET_DONE; + else + { /* Reset was issued by sb else */ + pACB->ACBFlag |= RESET_DETECT; + + dc390_ResetDevParam( pACB ); + dc390_DoingSRB_Done( pACB, NULL); + //dc390_RecoverSRB( pACB ); + pACB->pActiveDCB = NULL; + pACB->ACBFlag = 0; + } + return; +} + +static int DC390_queuecommand(struct scsi_cmnd *cmd, + void (*done)(struct scsi_cmnd *)) +{ + struct scsi_device *sdev = cmd->device; + struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata; + struct dc390_dcb *dcb = sdev->hostdata; + struct dc390_srb *srb; + + if (sdev->queue_depth <= dcb->GoingSRBCnt) + goto device_busy; + if (acb->pActiveDCB) + goto host_busy; + if (acb->ACBFlag & (RESET_DETECT|RESET_DONE|RESET_DEV)) + goto host_busy; + + srb = acb->pFreeSRB; + if (unlikely(srb == NULL)) + goto host_busy; + + cmd->scsi_done = done; + cmd->result = 0; + acb->Cmds++; + + acb->pFreeSRB = srb->pNextSRB; + srb->pNextSRB = NULL; + + srb->pSRBDCB = dcb; + srb->pcmd = cmd; + cmd->host_scribble = (char *)srb; + + srb->SGIndex = 0; + srb->AdaptStatus = 0; + srb->TargetStatus = 0; + srb->MsgCnt = 0; + + srb->SRBStatus = 0; + srb->SRBFlag = 0; + srb->SRBState = 0; + srb->TotalXferredLen = 0; + srb->SGBusAddr = 0; + srb->SGToBeXferLen = 0; + srb->ScsiPhase = 0; + srb->EndMessage = 0; + srb->TagNumber = SCSI_NO_TAG; + + if (dc390_StartSCSI(acb, dcb, srb)) { + dc390_Free_insert(acb, srb); + goto host_busy; + } + + dc390_Going_append(dcb, srb); + + return 0; + + host_busy: + return SCSI_MLQUEUE_HOST_BUSY; + + device_busy: + return SCSI_MLQUEUE_DEVICE_BUSY; +} + +static void dc390_dumpinfo (struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB) +{ + struct pci_dev *pdev; + u16 pstat; + + if (!pDCB) pDCB = pACB->pActiveDCB; + if (!pSRB && pDCB) pSRB = pDCB->pActiveSRB; + + if (pSRB) + { + printk ("DC390: SRB: Xferred %08lx, Remain %08lx, State %08x, Phase %02x\n", + pSRB->TotalXferredLen, pSRB->SGToBeXferLen, pSRB->SRBState, + pSRB->ScsiPhase); + printk ("DC390: AdpaterStatus: %02x, SRB Status %02x\n", pSRB->AdaptStatus, pSRB->SRBStatus); + } + printk ("DC390: Status of last IRQ (DMA/SC/Int/IRQ): %08x\n", dc390_laststatus); + printk ("DC390: Register dump: SCSI block:\n"); + printk ("DC390: XferCnt Cmd Stat IntS IRQS FFIS Ctl1 Ctl2 Ctl3 Ctl4\n"); + printk ("DC390: %06x %02x %02x %02x", + DC390_read8(CtcReg_Low) + (DC390_read8(CtcReg_Mid) << 8) + (DC390_read8(CtcReg_High) << 16), + DC390_read8(ScsiCmd), DC390_read8(Scsi_Status), DC390_read8(Intern_State)); + printk (" %02x %02x %02x %02x %02x %02x\n", + DC390_read8(INT_Status), DC390_read8(Current_Fifo), DC390_read8(CtrlReg1), + DC390_read8(CtrlReg2), DC390_read8(CtrlReg3), DC390_read8(CtrlReg4)); + DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT); + if (DC390_read8(Current_Fifo) & 0x1f) + { + printk ("DC390: FIFO:"); + while (DC390_read8(Current_Fifo) & 0x1f) printk (" %02x", DC390_read8(ScsiFifo)); + printk ("\n"); + } + printk ("DC390: Register dump: DMA engine:\n"); + printk ("DC390: Cmd STrCnt SBusA WrkBC WrkAC Stat SBusCtrl\n"); + printk ("DC390: %02x %08x %08x %08x %08x %02x %08x\n", + DC390_read8(DMA_Cmd), DC390_read32(DMA_XferCnt), DC390_read32(DMA_XferAddr), + DC390_read32(DMA_Wk_ByteCntr), DC390_read32(DMA_Wk_AddrCntr), + DC390_read8(DMA_Status), DC390_read32(DMA_ScsiBusCtrl)); + DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT); + + pdev = pACB->pdev; + pci_read_config_word(pdev, PCI_STATUS, &pstat); + printk ("DC390: Register dump: PCI Status: %04x\n", pstat); + printk ("DC390: In case of driver trouble read Documentation/scsi/tmscsim.txt\n"); +} + + +static int DC390_abort(struct scsi_cmnd *cmd) +{ + struct dc390_acb *pACB = (struct dc390_acb*) cmd->device->host->hostdata; + struct dc390_dcb *pDCB = (struct dc390_dcb*) cmd->device->hostdata; + + printk("DC390: Abort command (pid %li, Device %02i-%02i)\n", + cmd->pid, cmd->device->id, cmd->device->lun); + + /* abort() is too stupid for already sent commands at the moment. + * If it's called we are in trouble anyway, so let's dump some info + * into the syslog at least. (KG, 98/08/20,99/06/20) */ + dc390_dumpinfo(pACB, pDCB, NULL); + + pDCB->DCBFlag |= ABORT_DEV_; + printk(KERN_INFO "DC390: Aborted pid %li\n", cmd->pid); + + return FAILED; +} + + +static void dc390_ResetDevParam( struct dc390_acb* pACB ) +{ + struct dc390_dcb *pDCB, *pdcb; + + pDCB = pACB->pLinkDCB; + if (! pDCB) return; + pdcb = pDCB; + do + { + pDCB->SyncMode &= ~SYNC_NEGO_DONE; + pDCB->SyncPeriod = 0; + pDCB->SyncOffset = 0; + pDCB->TagMask = 0; + pDCB->CtrlR3 = FAST_CLK; + pDCB->CtrlR4 &= NEGATE_REQACKDATA | CTRL4_RESERVED | NEGATE_REQACK; + pDCB->CtrlR4 |= pACB->glitch_cfg; + pDCB = pDCB->pNextDCB; + } + while( pdcb != pDCB ); + pACB->ACBFlag &= ~(RESET_DEV | RESET_DONE | RESET_DETECT); + +} + +static int DC390_bus_reset (struct scsi_cmnd *cmd) +{ + struct dc390_acb* pACB = (struct dc390_acb*) cmd->device->host->hostdata; + u8 bval; + + bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST; + DC390_write8(CtrlReg1, bval); /* disable IRQ on bus reset */ + + pACB->ACBFlag |= RESET_DEV; + dc390_ResetSCSIBus(pACB); + + dc390_ResetDevParam(pACB); + udelay(1000); + pACB->pScsiHost->last_reset = jiffies + 3*HZ/2 + + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY]; + + DC390_write8(ScsiCmd, CLEAR_FIFO_CMD); + DC390_read8(INT_Status); /* Reset Pending INT */ + + dc390_DoingSRB_Done(pACB, cmd); + + pACB->pActiveDCB = NULL; + pACB->ACBFlag = 0; + + bval = DC390_read8(CtrlReg1) & ~DIS_INT_ON_SCSI_RST; + DC390_write8(CtrlReg1, bval); /* re-enable interrupt */ + + return SUCCESS; +} + +/** + * dc390_slave_alloc - Called by the scsi mid layer to tell us about a new + * scsi device that we need to deal with. + * + * @scsi_device: The new scsi device that we need to handle. + */ +static int dc390_slave_alloc(struct scsi_device *scsi_device) +{ + struct dc390_acb *pACB = (struct dc390_acb*) scsi_device->host->hostdata; + struct dc390_dcb *pDCB, *pDCB2 = NULL; + uint id = scsi_device->id; + uint lun = scsi_device->lun; + + pDCB = kmalloc(sizeof(struct dc390_dcb), GFP_KERNEL); + if (!pDCB) + return -ENOMEM; + memset(pDCB, 0, sizeof(struct dc390_dcb)); + + if (!pACB->DCBCnt++) { + pACB->pLinkDCB = pDCB; + pACB->pDCBRunRobin = pDCB; + } else { + pACB->pLastDCB->pNextDCB = pDCB; + } + + pDCB->pNextDCB = pACB->pLinkDCB; + pACB->pLastDCB = pDCB; + + pDCB->pDCBACB = pACB; + pDCB->TargetID = id; + pDCB->TargetLUN = lun; + + /* + * Some values are for all LUNs: Copy them + * In a clean way: We would have an own structure for a SCSI-ID + */ + if (lun && (pDCB2 = dc390_findDCB(pACB, id, 0))) { + pDCB->DevMode = pDCB2->DevMode; + pDCB->SyncMode = pDCB2->SyncMode & SYNC_NEGO_DONE; + pDCB->SyncPeriod = pDCB2->SyncPeriod; + pDCB->SyncOffset = pDCB2->SyncOffset; + pDCB->NegoPeriod = pDCB2->NegoPeriod; + + pDCB->CtrlR3 = pDCB2->CtrlR3; + pDCB->CtrlR4 = pDCB2->CtrlR4; + } else { + u8 index = pACB->AdapterIndex; + PEEprom prom = (PEEprom) &dc390_eepromBuf[index][id << 2]; + + pDCB->DevMode = prom->EE_MODE1; + pDCB->NegoPeriod = + (dc390_clock_period1[prom->EE_SPEED] * 25) >> 2; + pDCB->CtrlR3 = FAST_CLK; + pDCB->CtrlR4 = pACB->glitch_cfg | CTRL4_RESERVED; + if (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION) + pDCB->CtrlR4 |= NEGATE_REQACKDATA | NEGATE_REQACK; + } + + if (pDCB->DevMode & SYNC_NEGO_) + pDCB->SyncMode |= SYNC_ENABLE; + else { + pDCB->SyncMode = 0; + pDCB->SyncOffset &= ~0x0f; + } + + pDCB->CtrlR1 = pACB->pScsiHost->this_id; + if (pDCB->DevMode & PARITY_CHK_) + pDCB->CtrlR1 |= PARITY_ERR_REPO; + + pACB->scan_devices = 1; + scsi_device->hostdata = pDCB; + return 0; +} + +/** + * dc390_slave_destroy - Called by the scsi mid layer to tell us about a + * device that is going away. + * + * @scsi_device: The scsi device that we need to remove. + */ +static void dc390_slave_destroy(struct scsi_device *scsi_device) +{ + struct dc390_acb* pACB = (struct dc390_acb*) scsi_device->host->hostdata; + struct dc390_dcb* pDCB = (struct dc390_dcb*) scsi_device->hostdata; + struct dc390_dcb* pPrevDCB = pACB->pLinkDCB; + + pACB->scan_devices = 0; + + BUG_ON(pDCB->GoingSRBCnt > 1); + + if (pDCB == pACB->pLinkDCB) { + if (pACB->pLastDCB == pDCB) { + pDCB->pNextDCB = NULL; + pACB->pLastDCB = NULL; + } + pACB->pLinkDCB = pDCB->pNextDCB; + } else { + while (pPrevDCB->pNextDCB != pDCB) + pPrevDCB = pPrevDCB->pNextDCB; + pPrevDCB->pNextDCB = pDCB->pNextDCB; + if (pDCB == pACB->pLastDCB) + pACB->pLastDCB = pPrevDCB; + } + + if (pDCB == pACB->pActiveDCB) + pACB->pActiveDCB = NULL; + if (pDCB == pACB->pLinkDCB) + pACB->pLinkDCB = pDCB->pNextDCB; + if (pDCB == pACB->pDCBRunRobin) + pACB->pDCBRunRobin = pDCB->pNextDCB; + kfree(pDCB); + + pACB->DCBCnt--; +} + +static int dc390_slave_configure(struct scsi_device *sdev) +{ + struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata; + struct dc390_dcb *dcb = (struct dc390_dcb *)sdev->hostdata; + + acb->scan_devices = 0; + if (sdev->tagged_supported && (dcb->DevMode & TAG_QUEUEING_)) { + dcb->SyncMode |= EN_TAG_QUEUEING; + scsi_activate_tcq(sdev, acb->TagMaxNum); + } + + return 0; +} + +static struct scsi_host_template driver_template = { + .module = THIS_MODULE, + .proc_name = "tmscsim", + .name = DC390_BANNER " V" DC390_VERSION, + .slave_alloc = dc390_slave_alloc, + .slave_configure = dc390_slave_configure, + .slave_destroy = dc390_slave_destroy, + .queuecommand = DC390_queuecommand, + .eh_abort_handler = DC390_abort, + .eh_bus_reset_handler = DC390_bus_reset, + .can_queue = 1, + .this_id = 7, + .sg_tablesize = SG_ALL, + .cmd_per_lun = 1, + .use_clustering = DISABLE_CLUSTERING, +}; + +/*********************************************************************** + * Functions for access to DC390 EEPROM + * and some to emulate it + * + **********************************************************************/ + +static void __devinit dc390_eeprom_prepare_read(struct pci_dev *pdev, u8 cmd) +{ + u8 carryFlag = 1, j = 0x80, bval; + int i; + + for (i = 0; i < 9; i++) { + if (carryFlag) { + pci_write_config_byte(pdev, 0x80, 0x40); + bval = 0xc0; + } else + bval = 0x80; + + udelay(160); + pci_write_config_byte(pdev, 0x80, bval); + udelay(160); + pci_write_config_byte(pdev, 0x80, 0); + udelay(160); + + carryFlag = (cmd & j) ? 1 : 0; + j >>= 1; + } +} + +static u16 __devinit dc390_eeprom_get_data(struct pci_dev *pdev) +{ + int i; + u16 wval = 0; + u8 bval; + + for (i = 0; i < 16; i++) { + wval <<= 1; + + pci_write_config_byte(pdev, 0x80, 0x80); + udelay(160); + pci_write_config_byte(pdev, 0x80, 0x40); + udelay(160); + pci_read_config_byte(pdev, 0x00, &bval); + + if (bval == 0x22) + wval |= 1; + } + + return wval; +} + +static void __devinit dc390_read_eeprom(struct pci_dev *pdev, u16 *ptr) +{ + u8 cmd = EEPROM_READ, i; + + for (i = 0; i < 0x40; i++) { + pci_write_config_byte(pdev, 0xc0, 0); + udelay(160); + + dc390_eeprom_prepare_read(pdev, cmd++); + *ptr++ = dc390_eeprom_get_data(pdev); + + pci_write_config_byte(pdev, 0x80, 0); + pci_write_config_byte(pdev, 0x80, 0); + udelay(160); + } +} + +/* Override EEprom values with explicitly set values */ +static void __devinit dc390_eeprom_override(u8 index) +{ + u8 *ptr = (u8 *) dc390_eepromBuf[index], id; + + /* Adapter Settings */ + if (tmscsim[0] != -2) + ptr[EE_ADAPT_SCSI_ID] = (u8)tmscsim[0]; /* Adapter ID */ + if (tmscsim[3] != -2) + ptr[EE_MODE2] = (u8)tmscsim[3]; + if (tmscsim[5] != -2) + ptr[EE_DELAY] = tmscsim[5]; /* Reset delay */ + if (tmscsim[4] != -2) + ptr[EE_TAG_CMD_NUM] = (u8)tmscsim[4]; /* Tagged Cmds */ + + /* Device Settings */ + for (id = 0; id < MAX_SCSI_ID; id++) { + if (tmscsim[2] != -2) + ptr[id << 2] = (u8)tmscsim[2]; /* EE_MODE1 */ + if (tmscsim[1] != -2) + ptr[(id << 2) + 1] = (u8)tmscsim[1]; /* EE_Speed */ + } +} + +static int __devinitdata tmscsim_def[] = { + 7, + 0 /* 10MHz */, + PARITY_CHK_ | SEND_START_ | EN_DISCONNECT_ | SYNC_NEGO_ | TAG_QUEUEING_, + MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION | LUN_CHECK, + 3 /* 16 Tags per LUN */, + 1 /* s delay after Reset */, +}; + +/* Copy defaults over set values where missing */ +static void __devinit dc390_fill_with_defaults (void) +{ + int i; + + for (i = 0; i < 6; i++) { + if (tmscsim[i] < 0 || tmscsim[i] > 255) + tmscsim[i] = tmscsim_def[i]; + } + + /* Sanity checks */ + if (tmscsim[0] > 7) + tmscsim[0] = 7; + if (tmscsim[1] > 7) + tmscsim[1] = 4; + if (tmscsim[4] > 5) + tmscsim[4] = 4; + if (tmscsim[5] > 180) + tmscsim[5] = 180; +} + +static void __devinit dc390_check_eeprom(struct pci_dev *pdev, u8 index) +{ + u8 interpd[] = {1, 3, 5, 10, 16, 30, 60, 120}; + u8 EEbuf[128]; + u16 *ptr = (u16 *)EEbuf, wval = 0; + int i; + + dc390_read_eeprom(pdev, ptr); + memcpy(dc390_eepromBuf[index], EEbuf, EE_ADAPT_SCSI_ID); + memcpy(&dc390_eepromBuf[index][EE_ADAPT_SCSI_ID], + &EEbuf[REAL_EE_ADAPT_SCSI_ID], EE_LEN - EE_ADAPT_SCSI_ID); + + dc390_eepromBuf[index][EE_DELAY] = interpd[dc390_eepromBuf[index][EE_DELAY]]; + + for (i = 0; i < 0x40; i++, ptr++) + wval += *ptr; + + /* no Tekram EEprom found */ + if (wval != 0x1234) { + int speed; + + printk(KERN_INFO "DC390_init: No EEPROM found! Trying default settings ...\n"); + + /* + * XXX(hch): bogus, because we might have tekram and + * non-tekram hbas in a single machine. + */ + dc390_fill_with_defaults(); + + speed = dc390_clock_speed[tmscsim[1]]; + printk(KERN_INFO "DC390: Used defaults: AdaptID=%i, SpeedIdx=%i (%i.%i MHz), " + "DevMode=0x%02x, AdaptMode=0x%02x, TaggedCmnds=%i (%i), DelayReset=%is\n", + tmscsim[0], tmscsim[1], speed / 10, speed % 10, + (u8)tmscsim[2], (u8)tmscsim[3], tmscsim[4], 2 << (tmscsim[4]), tmscsim[5]); + } +} + +static void __devinit dc390_init_hw(struct dc390_acb *pACB, u8 index) +{ + struct Scsi_Host *shost = pACB->pScsiHost; + u8 dstate; + + /* Disable SCSI bus reset interrupt */ + DC390_write8(CtrlReg1, DIS_INT_ON_SCSI_RST | shost->this_id); + + if (pACB->Gmode2 & RST_SCSI_BUS) { + dc390_ResetSCSIBus(pACB); + udelay(1000); + shost->last_reset = jiffies + HZ/2 + + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY]; + } + + pACB->ACBFlag = 0; + + /* Reset Pending INT */ + DC390_read8(INT_Status); + + /* 250ms selection timeout */ + DC390_write8(Scsi_TimeOut, SEL_TIMEOUT); + + /* Conversion factor = 0 , 40MHz clock */ + DC390_write8(Clk_Factor, CLK_FREQ_40MHZ); + + /* NOP cmd - clear command register */ + DC390_write8(ScsiCmd, NOP_CMD); + + /* Enable Feature and SCSI-2 */ + DC390_write8(CtrlReg2, EN_FEATURE+EN_SCSI2_CMD); + + /* Fast clock */ + DC390_write8(CtrlReg3, FAST_CLK); + + /* Negation */ + DC390_write8(CtrlReg4, pACB->glitch_cfg | /* glitch eater */ + (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION) ? + NEGATE_REQACKDATA : 0); + + /* Clear Transfer Count High: ID */ + DC390_write8(CtcReg_High, 0); + DC390_write8(DMA_Cmd, DMA_IDLE_CMD); + DC390_write8(ScsiCmd, CLEAR_FIFO_CMD); + DC390_write32(DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT); + + dstate = DC390_read8(DMA_Status); + DC390_write8(DMA_Status, dstate); +} + +static int __devinit dc390_probe_one(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + struct dc390_acb *pACB; + struct Scsi_Host *shost; + unsigned long io_port; + int error = -ENODEV, i; + + if (pci_enable_device(pdev)) + goto out; + + pci_set_master(pdev); + + error = -ENOMEM; + shost = scsi_host_alloc(&driver_template, sizeof(struct dc390_acb)); + if (!shost) + goto out_disable_device; + + pACB = (struct dc390_acb *)shost->hostdata; + memset(pACB, 0, sizeof(struct dc390_acb)); + + dc390_check_eeprom(pdev, dc390_adapterCnt); + dc390_eeprom_override(dc390_adapterCnt); + + io_port = pci_resource_start(pdev, 0); + + shost->this_id = dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID]; + shost->io_port = io_port; + shost->n_io_port = 0x80; + shost->irq = pdev->irq; + shost->base = io_port; + shost->unique_id = io_port; + shost->last_reset = jiffies; + + pACB->pScsiHost = shost; + pACB->IOPortBase = (u16) io_port; + pACB->IRQLevel = pdev->irq; + + shost->max_id = 8; + + if (shost->max_id - 1 == + dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID]) + shost->max_id--; + + if (dc390_eepromBuf[dc390_adapterCnt][EE_MODE2] & LUN_CHECK) + shost->max_lun = 8; + else + shost->max_lun = 1; + + pACB->pFreeSRB = pACB->SRB_array; + pACB->SRBCount = MAX_SRB_CNT; + pACB->AdapterIndex = dc390_adapterCnt; + pACB->TagMaxNum = + 2 << dc390_eepromBuf[dc390_adapterCnt][EE_TAG_CMD_NUM]; + pACB->Gmode2 = dc390_eepromBuf[dc390_adapterCnt][EE_MODE2]; + + for (i = 0; i < pACB->SRBCount-1; i++) + pACB->SRB_array[i].pNextSRB = &pACB->SRB_array[i+1]; + pACB->SRB_array[pACB->SRBCount-1].pNextSRB = NULL; + pACB->pTmpSRB = &pACB->TmpSRB; + + pACB->sel_timeout = SEL_TIMEOUT; + pACB->glitch_cfg = EATER_25NS; + pACB->pdev = pdev; + + if (!request_region(io_port, shost->n_io_port, "tmscsim")) { + printk(KERN_ERR "DC390: register IO ports error!\n"); + goto out_host_put; + } + + /* Reset Pending INT */ + DC390_read8_(INT_Status, io_port); + + if (request_irq(pdev->irq, do_DC390_Interrupt, SA_SHIRQ, + "tmscsim", pACB)) { + printk(KERN_ERR "DC390: register IRQ error!\n"); + goto out_release_region; + } + + dc390_init_hw(pACB, dc390_adapterCnt); + + dc390_adapterCnt++; + + pci_set_drvdata(pdev, shost); + + error = scsi_add_host(shost, &pdev->dev); + if (error) + goto out_free_irq; + scsi_scan_host(shost); + return 0; + + out_free_irq: + free_irq(pdev->irq, pACB); + out_release_region: + release_region(io_port, shost->n_io_port); + out_host_put: + scsi_host_put(shost); + out_disable_device: + pci_disable_device(pdev); + out: + return error; +} + +/** + * dc390_remove_one - Called to remove a single instance of the adapter. + * + * @dev: The PCI device to remove. + */ +static void __devexit dc390_remove_one(struct pci_dev *dev) +{ + struct Scsi_Host *scsi_host = pci_get_drvdata(dev); + unsigned long iflags; + struct dc390_acb* pACB = (struct dc390_acb*) scsi_host->hostdata; + u8 bval; + + scsi_remove_host(scsi_host); + + spin_lock_irqsave(scsi_host->host_lock, iflags); + pACB->ACBFlag = RESET_DEV; + bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST; + DC390_write8 (CtrlReg1, bval); /* disable interrupt */ + if (pACB->Gmode2 & RST_SCSI_BUS) + dc390_ResetSCSIBus(pACB); + spin_unlock_irqrestore(scsi_host->host_lock, iflags); + + free_irq(scsi_host->irq, pACB); + release_region(scsi_host->io_port, scsi_host->n_io_port); + + pci_disable_device(dev); + scsi_host_put(scsi_host); + pci_set_drvdata(dev, NULL); +} + +static struct pci_device_id tmscsim_pci_tbl[] = { + { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD53C974, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, + { } +}; +MODULE_DEVICE_TABLE(pci, tmscsim_pci_tbl); + +static struct pci_driver dc390_driver = { + .name = "tmscsim", + .id_table = tmscsim_pci_tbl, + .probe = dc390_probe_one, + .remove = __devexit_p(dc390_remove_one), +}; + +static int __init dc390_module_init(void) +{ + if (tmscsim[0] == -1 || tmscsim[0] > 15) { + tmscsim[0] = 7; + tmscsim[1] = 4; + tmscsim[2] = PARITY_CHK_ | TAG_QUEUEING_; + tmscsim[3] = MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION; + tmscsim[4] = 2; + tmscsim[5] = 10; + printk (KERN_INFO "DC390: Using safe settings.\n"); + } + + return pci_module_init(&dc390_driver); +} + +static void __exit dc390_module_exit(void) +{ + pci_unregister_driver(&dc390_driver); +} + +module_init(dc390_module_init); +module_exit(dc390_module_exit); + +#ifndef MODULE +static int __init dc390_setup (char *str) +{ + int ints[8],i, im; + + get_options(str, ARRAY_SIZE(ints), ints); + im = ints[0]; + + if (im > 6) { + printk (KERN_NOTICE "DC390: ignore extra params!\n"); + im = 6; + } + + for (i = 0; i < im; i++) + tmscsim[i] = ints[i+1]; + /* dc390_checkparams (); */ + return 1; +} + +__setup("tmscsim=", dc390_setup); +#endif |