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linux/drivers/scsi/tmscsim.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

2694 lines
79 KiB
C
Raw Blame History

/************************************************************************
* 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
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