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linux/drivers/scsi/tmscsim.c
Jeff Garzik c7bec5aba5 Various drivers' irq handlers: kill dead code, needless casts 
- Eliminate casts to/from void*

- Eliminate checks for conditions that never occur.  These typically
  fall into two classes:

	1) Checking for 'dev_id == NULL', then it is never called with
	NULL as an argument.

	2) Checking for invalid irq number, when the only caller (the
	system) guarantees the irq handler is called with the proper
	'irq' number argument.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-10-06 15:00:58 -04:00

2715 lines
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/************************************************************************
* 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/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;
static int disable_clustering;
module_param(disable_clustering, int, S_IRUGO);
MODULE_PARM_DESC(disable_clustering, "If you experience problems with your devices, try setting to 1");
/* 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(void *dev_id)
{
struct dc390_acb *pACB = 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)
{
irqreturn_t ret;
DEBUG1(printk (KERN_INFO "DC390: Irq (%i) caught: ", irq));
/* Locking is done in DC390_Interrupt */
ret = DC390_Interrupt(dev_id);
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 )
{
static int feedback_requested;
bval = DC390_read8 (ScsiFifo); /* get one residual byte */
if (!feedback_requested) {
feedback_requested = 1;
printk(KERN_WARNING "%s: Please, contact <linux-scsi@vger.kernel.org> "
"to help improve support for your system.\n", __FILE__);
}
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;
scmd_printk(KERN_WARNING, cmd,
"DC390: Abort command (pid %li)\n", cmd->pid);
/* 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;
spin_lock_irq(cmd->device->host->host_lock);
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);
mdelay(1);
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 */
spin_unlock_irq(cmd->device->host->host_lock);
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 = ENABLE_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;
if (disable_clustering)
driver_template.use_clustering = DISABLE_CLUSTERING;
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, IRQF_SHARED,
"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 (!disable_clustering)
printk(KERN_INFO "DC390: clustering now enabled by default. If you get problems load\n"
"\twith \"disable_clustering=1\" and report to maintainers\n");
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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