[PATCH] bring i2o_block/i2o_scsi back to life

drivers/message/i2o/i2o_scsi.c

@@ -37,7 +37,6 @@
  *		Fix the resource management problems.
  */
 
-#error Please convert me to Documentation/DMA-mapping.txt
 
 #include <linux/module.h>
 #include <linux/kernel.h>
@@ -55,17 +54,21 @@
 #include <asm/io.h>
 #include <asm/atomic.h>
 #include <linux/blk.h>
-#include <linux/version.h>
 #include <linux/i2o.h>
 #include "../../scsi/scsi.h"
 #include "../../scsi/hosts.h"
 #include "../../scsi/sd.h"
-#include "i2o_scsi.h"
 
-#define VERSION_STRING        "Version 0.1.1"
+#if BITS_PER_LONG == 64
+#error FIXME: driver does not support 64-bit platforms
+#endif
+
+
+#define VERSION_STRING        "Version 0.1.2"
 
 #define dprintk(x)
 
+#define I2O_SCSI_CAN_QUEUE	4
 #define MAXHOSTS		32
 
 struct i2o_scsi_host
@@ -320,6 +323,12 @@ static void i2o_scsi_reply(struct i2o_handler *h, struct i2o_controller *c, stru
 		 *	It worked maybe ?
 		 */		
 		current_command->result = DID_OK << 16 | ds;
+
+	if (current_command->use_sg)
+		pci_unmap_sg(c->pdev, (struct scatterlist *)current_command->buffer, current_command->use_sg, scsi_to_pci_dma_dir(current_command->sc_data_direction));
+	else if (current_command->request_bufflen)
+		pci_unmap_single(c->pdev, (dma_addr_t)((long)current_command->SCp.ptr), current_command->request_bufflen, scsi_to_pci_dma_dir(current_command->sc_data_direction));
+
 	lock = current_command->host->host_lock;
 	spin_lock_irqsave(lock, flags);
 	current_command->scsi_done(current_command);
@@ -453,7 +462,6 @@ static void i2o_scsi_init(struct i2o_controller *c, struct i2o_device *d, struct
  
 static int i2o_scsi_detect(Scsi_Host_Template * tpnt)
 {
-	unsigned long flags;
 	struct Scsi_Host *shpnt = NULL;
 	int i;
 	int count;
@@ -681,6 +689,7 @@ static int i2o_scsi_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
 		return 0;
 	}
 
+	
 	i2o_raw_writel(I2O_CMD_SCSI_EXEC<<24|HOST_TID<<12|tid, &msg[1]);
 	i2o_raw_writel(scsi_context, &msg[2]);	/* So the I2O layer passes to us */
 	/* Sorry 64bit folks. FIXME */
@@ -752,10 +761,18 @@ static int i2o_scsi_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
 	if(SCpnt->use_sg)
 	{
 		struct scatterlist *sg = (struct scatterlist *)SCpnt->request_buffer;
+		int sg_count;
 		int chain = 0;
 		
 		len = 0;
 
+		sg_count = pci_map_sg(c->pdev, sg, SCpnt->use_sg,
+				      scsi_to_pci_dma_dir(SCpnt->sc_data_direction));
+
+		/* FIXME: handle fail */
+		if(!sg_count)
+			BUG();
+		
 		if((sg_max_frags > 11) && (SCpnt->use_sg > 11))
 		{
 			chain = 1;
@@ -775,27 +792,27 @@ static int i2o_scsi_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
 				sg_chain_tag = 0;
 			for(i = 0 ; i < SCpnt->use_sg; i++)
 			{
-				*mptr++=direction|0x10000000|sg->length;
-				len+=sg->length;
-				*mptr++=virt_to_bus(page_address(sg->page)+sg->offset);
+				*mptr++=cpu_to_le32(direction|0x10000000|sg_dma_len(sg));
+				len+=sg_dma_len(sg);
+				*mptr++=cpu_to_le32(sg_dma_address(sg));
 				sg++;
 			}
-			mptr[-2]=direction|0xD0000000|(sg-1)->length;
+			mptr[-2]=cpu_to_le32(direction|0xD0000000|sg_dma_len(sg-1));
 		}
 		else
 		{		
 			for(i = 0 ; i < SCpnt->use_sg; i++)
 			{
-				i2o_raw_writel(direction|0x10000000|sg->length, mptr++);
+				i2o_raw_writel(direction|0x10000000|sg_dma_len(sg), mptr++);
 				len+=sg->length;
-				i2o_raw_writel(virt_to_bus(page_address(sg->page) + sg->offset), mptr++);
+				i2o_raw_writel(sg_dma_address(sg), mptr++);
 				sg++;
 			}
 
 			/* Make this an end of list. Again evade the 920 bug and
 			   unwanted PCI read traffic */
 		
-			i2o_raw_writel(direction|0xD0000000|(sg-1)->length, &mptr[-2]);
+			i2o_raw_writel(direction|0xD0000000|sg_dma_len(sg-1), &mptr[-2]);
 		}
 		
 		if(!chain)
@@ -818,8 +835,16 @@ static int i2o_scsi_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
 		}
 		else
 		{
+			dma_addr_t dma_addr;
+			dma_addr = pci_map_single(c->pdev,
+					       SCpnt->request_buffer,
+					       SCpnt->request_bufflen,
+					       scsi_to_pci_dma_dir(SCpnt->sc_data_direction));
+			if(dma_addr == 0)
+				BUG();	/* How to handle ?? */
+			SCpnt->SCp.ptr = (char *)(unsigned long) dma_addr;
 			i2o_raw_writel(0xD0000000|direction|SCpnt->request_bufflen, mptr++);
-			i2o_raw_writel(virt_to_bus(SCpnt->request_buffer), mptr++);
+			i2o_raw_writel(dma_addr, mptr++);
 		}
 	}
 	
@@ -1046,6 +1071,24 @@ MODULE_AUTHOR("Red Hat Software");
 MODULE_LICENSE("GPL");
 
 
-static Scsi_Host_Template driver_template = I2OSCSI;
+static Scsi_Host_Template driver_template = {
+	.proc_name		= "i2o_scsi",
+	.name			= "I2O SCSI Layer",
+	.detect			= i2o_scsi_detect,
+	.release		= i2o_scsi_release,
+	.info			= i2o_scsi_info,
+	.command		= i2o_scsi_command,
+	.queuecommand		= i2o_scsi_queuecommand,
+	.eh_abort_handler	= i2o_scsi_abort,
+	.eh_bus_reset_handler	= i2o_scsi_bus_reset,
+	.eh_device_reset_handler= i2o_scsi_device_reset,
+	.eh_host_reset_handler	= i2o_scsi_host_reset,
+	.bios_param		= i2o_scsi_bios_param,
+	.can_queue		= I2O_SCSI_CAN_QUEUE,
+	.this_id		= 15,
+	.sg_tablesize		= 8,
+	.cmd_per_lun		= 6,
+	.use_clustering		= ENABLE_CLUSTERING,
+};
 
 #include "../../scsi/scsi_module.c"

drivers/message/i2o/i2o_scsi.h

-#ifndef _I2O_SCSI_H
-#define _I2O_SCSI_H
-
-#include <linux/types.h>
-#include <linux/kdev_t.h>
-
-#define I2O_SCSI_ID 15
-#define I2O_SCSI_CAN_QUEUE 4
-#define I2O_SCSI_CMD_PER_LUN 6
-
-static int i2o_scsi_detect(Scsi_Host_Template *);
-static const char *i2o_scsi_info(struct Scsi_Host *);
-static int i2o_scsi_command(Scsi_Cmnd *);
-static int i2o_scsi_queuecommand(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
-static int i2o_scsi_abort(Scsi_Cmnd *);
-static int i2o_scsi_bus_reset(Scsi_Cmnd *);
-static int i2o_scsi_host_reset(Scsi_Cmnd *);
-static int i2o_scsi_device_reset(Scsi_Cmnd *);
-static int i2o_scsi_bios_param(Disk *, struct block_device *, int *);
-static int i2o_scsi_release(struct Scsi_Host *host);
-
-#define I2OSCSI {                                       		\
-		  next: NULL,						\
-                  proc_name:         		"i2o_scsi",   		\
-                  name:              		"I2O SCSI Layer", 	\
-                  detect:            		i2o_scsi_detect,	\
-                  release:	     		i2o_scsi_release,	\
-                  info:              		i2o_scsi_info,		\
-                  command:           		i2o_scsi_command,	\
-                  queuecommand:      		i2o_scsi_queuecommand,	\
-                  eh_abort_handler:             i2o_scsi_abort,		\
-                  eh_bus_reset_handler:         i2o_scsi_bus_reset,	\
-                  eh_device_reset_handler:      i2o_scsi_device_reset,	\
-                  eh_host_reset_handler:	i2o_scsi_host_reset,	\
-  		  bios_param:        i2o_scsi_bios_param,   		\
-                  can_queue:         I2O_SCSI_CAN_QUEUE,    		\
-                  this_id:           I2O_SCSI_ID,           		\
-                  sg_tablesize:      8,                     		\
-                  cmd_per_lun:       I2O_SCSI_CMD_PER_LUN,  		\
-                  unchecked_isa_dma: 0,                     		\
-                  use_clustering:    ENABLE_CLUSTERING     		\
-                  }
-
-#endif