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
52 char firm_ver[4]; // Firmware version
57 unsigned long io_mem_addr;
58 unsigned long io_mem_length;
59 CfgTable_struct __iomem *cfgtable;
61 int interrupts_enabled;
64 int commands_outstanding;
65 int max_outstanding; /* Debug */
68 int usage_count; /* number of opens all all minor devices */
70 // information about each logical volume
71 drive_info_struct drv[CISS_MAX_LUN];
73 struct access_method access;
75 /* queue and queue Info */
76 CommandList_struct *reqQ;
77 CommandList_struct *cmpQ;
79 unsigned int maxQsinceinit;
83 //* pointers to command and error info pool */
84 CommandList_struct *cmd_pool;
85 dma_addr_t cmd_pool_dhandle;
86 ErrorInfo_struct *errinfo_pool;
87 dma_addr_t errinfo_pool_dhandle;
88 unsigned long *cmd_pool_bits;
92 int busy_initializing;
94 /* This element holds the zero based queue number of the last
95 * queue to be started. It is used for fairness.
99 // Disk structures we need to pass back
100 struct gendisk *gendisk[NWD];
101 #ifdef CONFIG_CISS_SCSI_TAPE
102 void *scsi_ctlr; /* ptr to structure containing scsi related stuff */
106 /* Defining the diffent access_menthods */
108 * Memory mapped FIFO interface (SMART 53xx cards)
110 #define SA5_DOORBELL 0x20
111 #define SA5_REQUEST_PORT_OFFSET 0x40
112 #define SA5_REPLY_INTR_MASK_OFFSET 0x34
113 #define SA5_REPLY_PORT_OFFSET 0x44
114 #define SA5_INTR_STATUS 0x30
115 #define SA5_SCRATCHPAD_OFFSET 0xB0
117 #define SA5_CTCFG_OFFSET 0xB4
118 #define SA5_CTMEM_OFFSET 0xB8
120 #define SA5_INTR_OFF 0x08
121 #define SA5B_INTR_OFF 0x04
122 #define SA5_INTR_PENDING 0x08
123 #define SA5B_INTR_PENDING 0x04
124 #define FIFO_EMPTY 0xffffffff
125 #define CCISS_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */
127 #define CISS_ERROR_BIT 0x02
129 #define CCISS_INTR_ON 1
130 #define CCISS_INTR_OFF 0
132 Send the command to the hardware
134 static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c)
137 printk("Sending %x - down to controller\n", c->busaddr );
138 #endif /* CCISS_DEBUG */
139 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
140 h->commands_outstanding++;
141 if ( h->commands_outstanding > h->max_outstanding)
142 h->max_outstanding = h->commands_outstanding;
146 * This card is the opposite of the other cards.
147 * 0 turns interrupts on...
148 * 0x08 turns them off...
150 static void SA5_intr_mask(ctlr_info_t *h, unsigned long val)
153 { /* Turn interrupts on */
154 h->interrupts_enabled = 1;
155 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
156 } else /* Turn them off */
158 h->interrupts_enabled = 0;
159 writel( SA5_INTR_OFF,
160 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
164 * This card is the opposite of the other cards.
165 * 0 turns interrupts on...
166 * 0x04 turns them off...
168 static void SA5B_intr_mask(ctlr_info_t *h, unsigned long val)
171 { /* Turn interrupts on */
172 h->interrupts_enabled = 1;
173 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
174 } else /* Turn them off */
176 h->interrupts_enabled = 0;
177 writel( SA5B_INTR_OFF,
178 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
182 * Returns true if fifo is full.
185 static unsigned long SA5_fifo_full(ctlr_info_t *h)
187 if( h->commands_outstanding >= h->max_commands)
194 * returns value read from hardware.
195 * returns FIFO_EMPTY if there is nothing to read
197 static unsigned long SA5_completed(ctlr_info_t *h)
199 unsigned long register_value
200 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
201 if(register_value != FIFO_EMPTY)
203 h->commands_outstanding--;
205 printk("cciss: Read %lx back from board\n", register_value);
206 #endif /* CCISS_DEBUG */
211 printk("cciss: FIFO Empty read\n");
214 return ( register_value);
218 * Returns true if an interrupt is pending..
220 static unsigned long SA5_intr_pending(ctlr_info_t *h)
222 unsigned long register_value =
223 readl(h->vaddr + SA5_INTR_STATUS);
225 printk("cciss: intr_pending %lx\n", register_value);
226 #endif /* CCISS_DEBUG */
227 if( register_value & SA5_INTR_PENDING)
233 * Returns true if an interrupt is pending..
235 static unsigned long SA5B_intr_pending(ctlr_info_t *h)
237 unsigned long register_value =
238 readl(h->vaddr + SA5_INTR_STATUS);
240 printk("cciss: intr_pending %lx\n", register_value);
241 #endif /* CCISS_DEBUG */
242 if( register_value & SA5B_INTR_PENDING)
248 static struct access_method SA5_access = {
256 static struct access_method SA5B_access = {
267 struct access_method *access;
270 #define CCISS_LOCK(i) (&hba[i]->lock)