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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/block/cciss.h
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/block/cciss.h')
-rw-r--r--drivers/block/cciss.h266
1 files changed, 266 insertions, 0 deletions
diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h
new file mode 100644
index 000000000000..8fb19206eddb
--- /dev/null
+++ b/drivers/block/cciss.h
@@ -0,0 +1,266 @@
+#ifndef CCISS_H
+#define CCISS_H
+
+#include <linux/genhd.h>
+
+#include "cciss_cmd.h"
+
+
+#define NWD 16
+#define NWD_SHIFT 4
+#define MAX_PART (1 << NWD_SHIFT)
+
+#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;
+ sector_t nr_blocks;
+ int block_size;
+ int heads;
+ int sectors;
+ int cylinders;
+ int raid_level;
+} drive_info_struct;
+
+struct ctlr_info
+{
+ int ctlr;
+ char devname[8];
+ char *product_name;
+ char firm_ver[4]; // Firmware version
+ struct pci_dev *pdev;
+ __u32 board_id;
+ void __iomem *vaddr;
+ unsigned long paddr;
+ unsigned long io_mem_addr;
+ unsigned long io_mem_length;
+ CfgTable_struct __iomem *cfgtable;
+ unsigned int intr;
+ int interrupts_enabled;
+ int major;
+ int max_commands;
+ int commands_outstanding;
+ int max_outstanding; /* Debug */
+ int num_luns;
+ int highest_lun;
+ 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;
+ spinlock_t lock;
+ struct request_queue *queue;
+
+ //* pointers to command and error info pool */
+ CommandList_struct *cmd_pool;
+ dma_addr_t cmd_pool_dhandle;
+ ErrorInfo_struct *errinfo_pool;
+ dma_addr_t errinfo_pool_dhandle;
+ unsigned long *cmd_pool_bits;
+ int nr_allocs;
+ int nr_frees;
+ int busy_configuring;
+
+ /* This element holds the zero based queue number of the last
+ * queue to be started. It is used for fairness.
+ */
+ int next_to_run;
+
+ // Disk structures we need to pass back
+ struct gendisk *gendisk[NWD];
+#ifdef CONFIG_CISS_SCSI_TAPE
+ void *scsi_ctlr; /* ptr to structure containing scsi related stuff */
+#endif
+};
+
+/* 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_SCRATCHPAD_OFFSET 0xB0
+
+#define SA5_CTCFG_OFFSET 0xB4
+#define SA5_CTMEM_OFFSET 0xB8
+
+#define SA5_INTR_OFF 0x08
+#define SA5B_INTR_OFF 0x04
+#define SA5_INTR_PENDING 0x08
+#define SA5B_INTR_PENDING 0x04
+#define FIFO_EMPTY 0xffffffff
+#define CCISS_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */
+
+#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 opposite 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 */
+ h->interrupts_enabled = 1;
+ writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
+ } else /* Turn them off */
+ {
+ h->interrupts_enabled = 0;
+ writel( SA5_INTR_OFF,
+ h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
+ }
+}
+/*
+ * This card is the opposite of the other cards.
+ * 0 turns interrupts on...
+ * 0x04 turns them off...
+ */
+static void SA5B_intr_mask(ctlr_info_t *h, unsigned long val)
+{
+ if (val)
+ { /* Turn interrupts on */
+ h->interrupts_enabled = 1;
+ writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
+ } else /* Turn them off */
+ {
+ h->interrupts_enabled = 0;
+ writel( SA5B_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 ;
+}
+
+/*
+ * Returns true if an interrupt is pending..
+ */
+static unsigned long SA5B_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 & SA5B_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,
+};
+
+static struct access_method SA5B_access = {
+ SA5_submit_command,
+ SA5B_intr_mask,
+ SA5_fifo_full,
+ SA5B_intr_pending,
+ SA5_completed,
+};
+
+struct board_type {
+ __u32 board_id;
+ char *product_name;
+ struct access_method *access;
+};
+
+#define CCISS_LOCK(i) (hba[i]->queue->queue_lock)
+
+#endif /* CCISS_H */
+