patch-2.2.18 linux/drivers/block/cciss.h

• Lines: 202
• Date: Wed Nov 8 23:19:44 2000
• Orig file: v2.2.17/drivers/block/cciss.h
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/drivers/block/cciss.h linux/drivers/block/cciss.h
@@ -0,0 +1,201 @@
+#ifndef CCISS_H
+#define CCISS_H
+
+#include <linux/genhd.h>
+
+#include "cciss_cmd.h"
+
+
+#define NWD		16
+#define NWD_SHIFT	4
+#define MAX_PART	16
+
+#define IO_OK		0
+#define IO_ERROR	1
+
+#define MAJOR_NR COMPAQ_CISS_MAJOR 
+
+struct ctlr_info;
+typedef struct ctlr_info ctlr_info_t;
+
+struct access_method {
+	void (*submit_command)(ctlr_info_t *h, CommandList_struct *c);
+	void (*set_intr_mask)(ctlr_info_t *h, unsigned long val);
+	unsigned long (*fifo_full)(ctlr_info_t *h);
+	unsigned long (*intr_pending)(ctlr_info_t *h);
+	unsigned long (*command_completed)(ctlr_info_t *h);
+};
+typedef struct _drive_info_struct
+{
+ 	__u32   LunID;	
+	int 	usage_count;
+	int 	nr_blocks;
+	int	block_size;
+	int 	heads;
+	int	sectors;
+	int 	cylinders;
+} drive_info_struct;
+
+struct ctlr_info 
+{
+	int	ctlr;
+	char	devname[8];
+	char    *product_name;
+	char	firm_ver[4]; // Firmware version 
+	unchar  pci_bus;
+        unchar  pci_dev_fn;
+	__u32	board_id;
+	__u32	vaddr;
+	__u32	paddr;	
+	CfgTable_struct *cfgtable;
+	int	intr;
+
+	int 	max_commands;
+	int	commands_outstanding;
+	int 	max_outstanding; /* Debug */ 
+	int	num_luns;
+	int	usage_count;  /* number of opens all all minor devices */
+
+	// information about each logical volume
+	drive_info_struct drv[CISS_MAX_LUN];
+
+	struct access_method access;
+
+	/* queue and queue Info */ 
+	CommandList_struct *reqQ;
+	CommandList_struct  *cmpQ;
+	unsigned int Qdepth;
+	unsigned int maxQsinceinit;
+	unsigned int maxSG;
+
+	//* pointers to command and error info pool */ 
+	CommandList_struct 	*cmd_pool;
+	ErrorInfo_struct 	*errinfo_pool;
+        __u32   		*cmd_pool_bits;
+	int			nr_allocs;
+	int			nr_frees; 
+
+	// Disk structures we need to pass back
+	struct gendisk   gendisk;
+	   // indexed by minor numbers
+	struct hd_struct hd[256];
+	int              sizes[256];
+	int              blocksizes[256];
+	int              hardsizes[256];
+};
+
+/*  Defining the diffent access_menthods */
+/*
+ * Memory mapped FIFO interface (SMART 53xx cards)
+ */
+#define SA5_DOORBELL	0x20
+#define SA5_REQUEST_PORT_OFFSET	0x40
+#define SA5_REPLY_INTR_MASK_OFFSET	0x34
+#define SA5_REPLY_PORT_OFFSET		0x44
+#define SA5_INTR_STATUS		0x30
+
+#define SA5_INTR_OFF		0x08
+#define SA5_INTR_PENDING	0x08
+#define FIFO_EMPTY		0xffffffff	
+
+#define  CISS_ERROR_BIT		0x02
+
+#define CCISS_INTR_ON 	1 
+#define CCISS_INTR_OFF	0
+/* 
+	Send the command to the hardware 
+*/
+static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c) 
+{
+#ifdef CCISS_DEBUG
+	 printk("Sending %x - down to controller\n", c->busaddr );
+#endif /* CCISS_DEBUG */ 
+         writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
+	 h->commands_outstanding++;
+	 if ( h->commands_outstanding > h->max_outstanding)
+		h->max_outstanding = h->commands_outstanding;
+}
+
+/*  
+ *  This card is the oposite of the other cards.  
+ *   0 turns interrupts on... 
+ *   0x08 turns them off... 
+ */
+static void SA5_intr_mask(ctlr_info_t *h, unsigned long val)
+{
+	if (val) 
+	{ /* Turn interrupts on */
+		writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
+	} else /* Turn them off */
+	{
+        	writel( SA5_INTR_OFF, 
+			h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
+	}
+}
+/*
+ *  Returns true if fifo is full.  
+ * 
+ */ 
+static unsigned long SA5_fifo_full(ctlr_info_t *h)
+{
+	if( h->commands_outstanding >= h->max_commands)
+		return(1);
+	else 
+		return(0);
+
+}
+/* 
+ *   returns value read from hardware. 
+ *     returns FIFO_EMPTY if there is nothing to read 
+ */ 
+static unsigned long SA5_completed(ctlr_info_t *h)
+{
+	unsigned long register_value 
+		= readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
+	if(register_value != FIFO_EMPTY)
+	{
+		h->commands_outstanding--;
+#ifdef CCISS_DEBUG
+		printk("cciss:  Read %lx back from board\n", register_value);
+#endif /* CCISS_DEBUG */ 
+	} 
+#ifdef CCISS_DEBUG
+	else
+	{
+		printk("cciss:  FIFO Empty read\n");
+	}
+#endif 
+	return ( register_value); 
+
+}
+/*
+ *	Returns true if an interrupt is pending.. 
+ */
+static unsigned long SA5_intr_pending(ctlr_info_t *h)
+{
+	unsigned long register_value  = 
+		readl(h->vaddr + SA5_INTR_STATUS);
+#ifdef CCISS_DEBUG
+	printk("cciss: intr_pending %lx\n", register_value);
+#endif  /* CCISS_DEBUG */
+	if( register_value &  SA5_INTR_PENDING) 
+		return  1;	
+	return 0 ;
+}
+
+
+static struct access_method SA5_access = {
+	SA5_submit_command,
+	SA5_intr_mask,
+	SA5_fifo_full,
+	SA5_intr_pending,
+	SA5_completed,
+};
+
+struct board_type {
+	__u32	board_id;
+	char	*product_name;
+	struct access_method *access;
+};
+#endif /* CCISS_H */
+