[PATCH] [RFC] fix compile erros in ini9100 driver

The attached patch fixes the compile errors from the DMA and scsi_cmnd
next usage. It has been tested on bugzilla here:
http://bugzilla.kernel.org/show_bug.cgi?id=213

I was not sure about the variable casting in the driver, but this is how
the qlogicisp driver did it. The driver also still needs to be converted
to the new error handling.

drivers/scsi/ini9100u.c

@@ -104,12 +104,12 @@
  *		  Now fixed.
  * 05/07/99 bv	- v1.03g
  *		- Changed the assumption that HZ = 100
+ * 10/17/03 mc	- v1.04
+ *		- added new DMA API support
  **************************************************************************/
 
 #define CVT_LINUX_VERSION(V,P,S)        (V * 65536 + P * 256 + S)
 
-#error Please convert me to Documentation/DMA-mapping.txt
-
 #ifndef LINUX_VERSION_CODE
 #include <linux/version.h>
 #endif
@@ -143,13 +143,12 @@ unsigned int i91u_debug = DEBUG_DEFAULT;
 
 static Scsi_Host_Template driver_template = {
 	.proc_name	= "INI9100U",
-	.proc_info	= "INI9100U",
 	.name		= i91u_REVID,
 	.detect		= i91u_detect,
 	.release	= i91u_release,
 	.queuecommand	= i91u_queue,
-	.abort		= i91u_abort,
-	.reset		= i91u_reset,
+//	.abort		= i91u_abort,
+//	.reset		= i91u_reset,
 	.bios_param	= i91u_biosparam,
 	.can_queue	= 1,
 	.this_id	= 1,
@@ -162,7 +161,7 @@ static Scsi_Host_Template driver_template = {
 char *i91uCopyright = "Copyright (C) 1996-98";
 char *i91uInitioName = "by Initio Corporation";
 char *i91uProductName = "INI-9X00U/UW";
-char *i91uVersion = "v1.03g";
+char *i91uVersion = "v1.04";
 
 #define TULSZ(sz)     (sizeof(sz) / sizeof(sz[0]))
 #define TUL_RDWORD(x,y)         (short)(inl((int)((ULONG)((ULONG)x+(UCHAR)y)) ))
@@ -238,12 +237,12 @@ static void i91uAppendSRBToQueue(HCS * pHCB, Scsi_Cmnd * pSRB)
 	ULONG flags;
 	spin_lock_irqsave(&(pHCB->pSRB_lock), flags);
 
-	pSRB->next = NULL;	/* Pointer to next              */
+	pSRB->host_scribble = NULL;	/* Pointer to next */
 
 	if (pHCB->pSRB_head == NULL)
 		pHCB->pSRB_head = pSRB;
 	else
-		pHCB->pSRB_tail->next = pSRB;	/* Pointer to next              */
+		pHCB->pSRB_tail->host_scribble = (char *)pSRB;	/* Pointer to next */
 	pHCB->pSRB_tail = pSRB;
 
 	spin_unlock_irqrestore(&(pHCB->pSRB_lock), flags);
@@ -265,8 +264,8 @@ static Scsi_Cmnd *i91uPopSRBFromQueue(HCS * pHCB)
 	spin_lock_irqsave(&(pHCB->pSRB_lock), flags);
 
 	if ((pSRB = pHCB->pSRB_head) != NULL) {
-		pHCB->pSRB_head = pHCB->pSRB_head->next;
-		pSRB->next = NULL;
+		pHCB->pSRB_head = (struct scsi_cmnd *)pHCB->pSRB_head->host_scribble;
+		pSRB->host_scribble = NULL;
 	}
 	spin_unlock_irqrestore(&(pHCB->pSRB_lock), flags);
 
@@ -308,6 +307,12 @@ int tul_NewReturnNumberOfAdapters(void)
 			if (((dRegValue & 0xFF00) >> 8) == 0xFF)
 				dRegValue = 0;
 			wBIOS = (wBIOS << 8) + ((UWORD) ((dRegValue & 0xFF00) >> 8));
+			if (pci_set_dma_mask(pDev, 0xffffffff)) {
+				printk(KERN_WARNING 
+				       "i91u: Could not set 32 bit DMA mask\n");
+				continue;
+			}
+
 			if (Addi91u_into_Adapter_table(wBIOS,
 							(pDev->resource[0].start),
 						       	pDev->irq,
@@ -346,12 +351,7 @@ int i91u_detect(Scsi_Host_Template * tpnt)
 #endif
 	}
 	/* Get total number of adapters in the motherboard */
-#ifdef CONFIG_PCI
 	iAdapters = tul_NewReturnNumberOfAdapters();
-#else
-	iAdapters = tul_ReturnNumberOfAdapters();
-#endif
-
 	if (iAdapters == 0)	/* If no tulip founded, return */
 		return (0);
 
@@ -370,7 +370,7 @@ int i91u_detect(Scsi_Host_Template * tpnt)
 
 	for (; tul_num_scb >= MAX_TARGETS + 3; tul_num_scb--) {
 		i = tul_num_ch * tul_num_scb * sizeof(SCB);
-		if ((tul_scb = (SCB *) kmalloc(i, GFP_ATOMIC | GFP_DMA)) != NULL)
+		if ((tul_scb = (SCB *) kmalloc(i, GFP_ATOMIC)) != NULL)
 			break;
 	}
 	if (tul_scb == NULL) {
@@ -381,7 +381,7 @@ int i91u_detect(Scsi_Host_Template * tpnt)
 
 	pSCB = tul_scb;
 	for (i = 0; i < tul_num_ch * tul_num_scb; i++, pSCB++) {
-		pSCB->SCB_SGPAddr = (U32) VIRT_TO_BUS(&pSCB->SCB_SGList[0]);
+		pSCB->SCB_SGPAddr = (u32)&pSCB->SCB_SGList[0];
 	}
 
 	for (i = 0, pHCB = &tul_hcs[0];		/* Get pointer for control block */
@@ -476,6 +476,7 @@ static void i91uBuildSCB(HCS * pHCB, SCB * pSCB, Scsi_Cmnd * SCpnt)
 	SG *pSG;		/* Pointer to SG list           */
 	int i;
 	long TotalLen;
+	dma_addr_t dma_addr;
 
 	pSCB->SCB_Post = i91uSCBPost;	/* i91u's callback routine      */
 	pSCB->SCB_Srb = SCpnt;
@@ -484,11 +485,13 @@ static void i91uBuildSCB(HCS * pHCB, SCB * pSCB, Scsi_Cmnd * SCpnt)
 	pSCB->SCB_Target = SCpnt->device->id;
 	pSCB->SCB_Lun = SCpnt->device->lun;
 	pSCB->SCB_Ident = SCpnt->device->lun | DISC_ALLOW;
-	pSCB->SCB_Flags |= SCF_SENSE;	/* Turn on auto request sense   */
-
-	pSCB->SCB_SensePtr = (U32) VIRT_TO_BUS(SCpnt->sense_buffer);
 
+	pSCB->SCB_Flags |= SCF_SENSE;	/* Turn on auto request sense   */
+	dma_addr = dma_map_single(&pHCB->pci_dev->dev, SCpnt->sense_buffer,
+				  SENSE_SIZE, DMA_FROM_DEVICE);
+	pSCB->SCB_SensePtr = cpu_to_le32((u32)dma_addr);
 	pSCB->SCB_SenseLen = SENSE_SIZE;
+	SCpnt->SCp.ptr = (char *)(unsigned long)dma_addr;
 
 	pSCB->SCB_CDBLen = SCpnt->cmd_len;
 	pSCB->SCB_HaStat = 0;
@@ -503,30 +506,32 @@ static void i91uBuildSCB(HCS * pHCB, SCB * pSCB, Scsi_Cmnd * SCpnt)
 
 	if (SCpnt->use_sg) {
 		pSrbSG = (struct scatterlist *) SCpnt->request_buffer;
-		if (SCpnt->use_sg == 1) {	/* If only one entry in the list *//*      treat it as regular I/O */
-			pSCB->SCB_BufPtr = (U32) VIRT_TO_BUS(pSrbSG->address);
-			TotalLen = pSrbSG->length;
-			pSCB->SCB_SGLen = 0;
-		} else {	/* Assign SG physical address   */
-			pSCB->SCB_BufPtr = pSCB->SCB_SGPAddr;
-			pSCB->SCB_Flags |= SCF_SG;	/* Turn on SG list flag       */
-			for (i = 0, TotalLen = 0, pSG = &pSCB->SCB_SGList[0];	/* 1.01g */
-			     i < SCpnt->use_sg;
-			     i++, pSG++, pSrbSG++) {
-				pSG->SG_Ptr = (U32) VIRT_TO_BUS(pSrbSG->address);
-				TotalLen += pSG->SG_Len = pSrbSG->length;
-			}
-			pSCB->SCB_SGLen = i;
+
+		pSCB->SCB_SGLen = dma_map_sg(&pHCB->pci_dev->dev, pSrbSG,
+					     SCpnt->use_sg, SCpnt->sc_data_direction);
+
+		pSCB->SCB_BufPtr = pSCB->SCB_SGPAddr;
+		pSCB->SCB_Flags |= SCF_SG;	/* Turn on SG list flag       */
+		for (i = 0, TotalLen = 0, pSG = &pSCB->SCB_SGList[0];	/* 1.01g */
+		     i < pSCB->SCB_SGLen; i++, pSG++, pSrbSG++) {
+			pSG->SG_Ptr = cpu_to_le32((u32)sg_dma_address(pSrbSG));
+			TotalLen += pSG->SG_Len = cpu_to_le32((u32)sg_dma_len(pSrbSG));
 		}
+
 		pSCB->SCB_BufLen = (SCpnt->request_bufflen > TotalLen) ?
 		    TotalLen : SCpnt->request_bufflen;
-	} else {		/* Non SG                       */
-		pSCB->SCB_BufPtr = (U32) VIRT_TO_BUS(SCpnt->request_buffer);
-		pSCB->SCB_BufLen = SCpnt->request_bufflen;
+	} else if (SCpnt->request_bufflen) {		/* Non SG */
+		dma_addr = dma_map_single(&pHCB->pci_dev->dev, SCpnt->request_buffer,
+					  SCpnt->request_bufflen,
+					  SCpnt->sc_data_direction);
+		SCpnt->SCp.dma_handle = dma_addr;
+		pSCB->SCB_BufPtr = cpu_to_le32((u32)dma_addr);
+		pSCB->SCB_BufLen = cpu_to_le32((u32)SCpnt->request_bufflen);
+		pSCB->SCB_SGLen = 0;
+	} else {
+		pSCB->SCB_BufLen = 0;
 		pSCB->SCB_SGLen = 0;
 	}
-
-	return;
 }
 
 /* 
@@ -623,6 +628,28 @@ int i91u_biosparam(struct scsi_device *sdev, struct block_device *dev,
 	return 0;
 }
 
+static void i91u_unmap_cmnd(struct pci_dev *pci_dev, struct scsi_cmnd *cmnd)
+{
+	/* auto sense buffer */
+	if (cmnd->SCp.ptr) {
+		dma_unmap_single(&pci_dev->dev,
+				 (dma_addr_t)((unsigned long)cmnd->SCp.ptr),
+				 SENSE_SIZE, SCSI_DATA_READ);
+		cmnd->SCp.ptr = NULL;
+	}
+
+	/* request buffer */
+	if (cmnd->use_sg) {
+		dma_unmap_sg(&pci_dev->dev, cmnd->request_buffer,
+			     cmnd->use_sg,
+			     scsi_to_pci_dma_dir(cmnd->sc_data_direction));
+	} else if (cmnd->request_bufflen) {
+		dma_unmap_single(&pci_dev->dev, cmnd->SCp.dma_handle,
+				 cmnd->request_bufflen,
+				 scsi_to_pci_dma_dir(cmnd->sc_data_direction));
+	}
+}
+
 /*****************************************************************************
  Function name  : i91uSCBPost
  Description    : This is callback routine be called when tulip finish one
@@ -686,6 +713,8 @@ static void i91uSCBPost(BYTE * pHcb, BYTE * pScb)
 	if (pSRB == NULL) {
 		printk("pSRB is NULL\n");
 	}
+
+	i91u_unmap_cmnd(pHCB->pci_dev, pSRB);
 	pSRB->scsi_done(pSRB);	/* Notify system DONE           */
 	if ((pSRB = i91uPopSRBFromQueue(pHCB)) != NULL)
 		/* Find the next pending SRB    */