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[SCSI] tmscsim: remove long dead DMA_INT

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DMA_INT code is disabled since 1998, remove it to prepare
for further cleanup.

Signed-off-by: G. Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Guennadi Liakhovetski 2007-05-04 22:57:37 +02:00 committed by James Bottomley
parent 473b1e8ed2
commit 860bfecf71
1 changed files with 9 additions and 89 deletions
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98
drivers/scsi/tmscsim.c
View File

@ -625,70 +625,6 @@ dc390_StartSCSI( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_sr
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)
@ -708,9 +644,6 @@ DC390_Interrupt(void *dev_id)
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) )
@ -718,22 +651,9 @@ DC390_Interrupt(void *dev_id)
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);
@ -879,7 +799,7 @@ dc390_DataOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
}
if ((*psstatus & 7) != SCSI_DATA_OUT)
{
DC390_write8 (DMA_Cmd, WRITE_DIRECTION+DMA_IDLE_CMD); /* | DMA_INT */
DC390_write8 (DMA_Cmd, WRITE_DIRECTION+DMA_IDLE_CMD);
DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
}
}
@ -924,7 +844,7 @@ dc390_DataIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
+ ((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 */
DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
pSRB->SGIndex++;
@ -973,7 +893,7 @@ din_1:
}
/* 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_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
dc390_laststatus &= ~0xff000000; dc390_laststatus |= bval << 24;
DEBUG1(printk (KERN_DEBUG "Blast: Read %i times DMA_Status %02x", 0xa000-i, bval));
@ -1013,7 +933,7 @@ din_1:
if ((*psstatus & 7) != SCSI_DATA_IN)
{
DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD); /* | DMA_INT */
DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
}
}
@ -1391,7 +1311,7 @@ dc390_DataIO_Comm( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 ioDir)
if( pSRB->SGIndex < pSRB->SGcount )
{
DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir /* | DMA_INT */);
DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
if( !pSRB->SGToBeXferLen )
{
psgl = pSRB->pSegmentList;
@ -1410,12 +1330,12 @@ dc390_DataIO_Comm( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 ioDir)
DC390_write32 (DMA_XferCnt, pSRB->SGToBeXferLen);
DC390_write32 (DMA_XferAddr, pSRB->SGBusAddr);
//DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir); /* | DMA_INT; */
//DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
pSRB->SRBState = SRB_DATA_XFER;
DC390_write8 (ScsiCmd, DMA_COMMAND+INFO_XFER_CMD);
DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir | DMA_INT);
DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir);
//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));
@ -1436,8 +1356,8 @@ dc390_DataIO_Comm( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 ioDir)
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);
DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir);
*/
}
}