4 #include <linux/genhd.h>
11 #define MAX_PART (1 << NWD_SHIFT)
16 #define MAJOR_NR COMPAQ_CISS_MAJOR
19 typedef struct ctlr_info ctlr_info_t;
21 struct access_method {
22 void (*submit_command)(ctlr_info_t *h, CommandList_struct *c);
23 void (*set_intr_mask)(ctlr_info_t *h, unsigned long val);
24 unsigned long (*fifo_full)(ctlr_info_t *h);
25 unsigned long (*intr_pending)(ctlr_info_t *h);
26 unsigned long (*command_completed)(ctlr_info_t *h);
28 typedef struct _drive_info_struct
32 struct request_queue *queue;
38 int raid_level; /* set to -1 to indicate that
39 * the drive is not in use/configured
41 int busy_configuring; /*This is set when the drive is being removed
42 *to prevent it from being opened or it's queue
47 #ifdef CONFIG_CISS_SCSI_TAPE
49 struct sendcmd_reject_list {
51 unsigned long *complete; /* array of NR_CMDS tags */
60 char firm_ver[4]; // Firmware version
65 unsigned long io_mem_addr;
66 unsigned long io_mem_length;
67 CfgTable_struct __iomem *cfgtable;
69 int interrupts_enabled;
72 int commands_outstanding;
73 int max_outstanding; /* Debug */
76 int usage_count; /* number of opens all all minor devices */
78 // information about each logical volume
79 drive_info_struct drv[CISS_MAX_LUN];
81 struct access_method access;
83 /* queue and queue Info */
84 CommandList_struct *reqQ;
85 CommandList_struct *cmpQ;
87 unsigned int maxQsinceinit;
91 //* pointers to command and error info pool */
92 CommandList_struct *cmd_pool;
93 dma_addr_t cmd_pool_dhandle;
94 ErrorInfo_struct *errinfo_pool;
95 dma_addr_t errinfo_pool_dhandle;
96 unsigned long *cmd_pool_bits;
100 int busy_initializing;
102 /* This element holds the zero based queue number of the last
103 * queue to be started. It is used for fairness.
107 // Disk structures we need to pass back
108 struct gendisk *gendisk[NWD];
109 #ifdef CONFIG_CISS_SCSI_TAPE
110 void *scsi_ctlr; /* ptr to structure containing scsi related stuff */
111 /* list of block side commands the scsi error handling sucked up */
112 /* and saved for later processing */
113 struct sendcmd_reject_list scsi_rejects;
118 /* Defining the diffent access_menthods */
120 * Memory mapped FIFO interface (SMART 53xx cards)
122 #define SA5_DOORBELL 0x20
123 #define SA5_REQUEST_PORT_OFFSET 0x40
124 #define SA5_REPLY_INTR_MASK_OFFSET 0x34
125 #define SA5_REPLY_PORT_OFFSET 0x44
126 #define SA5_INTR_STATUS 0x30
127 #define SA5_SCRATCHPAD_OFFSET 0xB0
129 #define SA5_CTCFG_OFFSET 0xB4
130 #define SA5_CTMEM_OFFSET 0xB8
132 #define SA5_INTR_OFF 0x08
133 #define SA5B_INTR_OFF 0x04
134 #define SA5_INTR_PENDING 0x08
135 #define SA5B_INTR_PENDING 0x04
136 #define FIFO_EMPTY 0xffffffff
137 #define CCISS_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */
139 #define CISS_ERROR_BIT 0x02
141 #define CCISS_INTR_ON 1
142 #define CCISS_INTR_OFF 0
144 Send the command to the hardware
146 static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c)
149 printk("Sending %x - down to controller\n", c->busaddr );
150 #endif /* CCISS_DEBUG */
151 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
152 h->commands_outstanding++;
153 if ( h->commands_outstanding > h->max_outstanding)
154 h->max_outstanding = h->commands_outstanding;
158 * This card is the opposite of the other cards.
159 * 0 turns interrupts on...
160 * 0x08 turns them off...
162 static void SA5_intr_mask(ctlr_info_t *h, unsigned long val)
165 { /* Turn interrupts on */
166 h->interrupts_enabled = 1;
167 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
168 } else /* Turn them off */
170 h->interrupts_enabled = 0;
171 writel( SA5_INTR_OFF,
172 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
176 * This card is the opposite of the other cards.
177 * 0 turns interrupts on...
178 * 0x04 turns them off...
180 static void SA5B_intr_mask(ctlr_info_t *h, unsigned long val)
183 { /* Turn interrupts on */
184 h->interrupts_enabled = 1;
185 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
186 } else /* Turn them off */
188 h->interrupts_enabled = 0;
189 writel( SA5B_INTR_OFF,
190 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
194 * Returns true if fifo is full.
197 static unsigned long SA5_fifo_full(ctlr_info_t *h)
199 if( h->commands_outstanding >= h->max_commands)
206 * returns value read from hardware.
207 * returns FIFO_EMPTY if there is nothing to read
209 static unsigned long SA5_completed(ctlr_info_t *h)
211 unsigned long register_value
212 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
213 if(register_value != FIFO_EMPTY)
215 h->commands_outstanding--;
217 printk("cciss: Read %lx back from board\n", register_value);
218 #endif /* CCISS_DEBUG */
223 printk("cciss: FIFO Empty read\n");
226 return ( register_value);
230 * Returns true if an interrupt is pending..
232 static unsigned long SA5_intr_pending(ctlr_info_t *h)
234 unsigned long register_value =
235 readl(h->vaddr + SA5_INTR_STATUS);
237 printk("cciss: intr_pending %lx\n", register_value);
238 #endif /* CCISS_DEBUG */
239 if( register_value & SA5_INTR_PENDING)
245 * Returns true if an interrupt is pending..
247 static unsigned long SA5B_intr_pending(ctlr_info_t *h)
249 unsigned long register_value =
250 readl(h->vaddr + SA5_INTR_STATUS);
252 printk("cciss: intr_pending %lx\n", register_value);
253 #endif /* CCISS_DEBUG */
254 if( register_value & SA5B_INTR_PENDING)
260 static struct access_method SA5_access = {
268 static struct access_method SA5B_access = {
279 struct access_method *access;
282 #define CCISS_LOCK(i) (&hba[i]->lock)