4 #include <linux/genhd.h>
10 #define MAX_PART (1 << NWD_SHIFT)
16 typedef struct ctlr_info ctlr_info_t;
18 struct access_method {
19 void (*submit_command)(ctlr_info_t *h, CommandList_struct *c);
20 void (*set_intr_mask)(ctlr_info_t *h, unsigned long val);
21 unsigned long (*fifo_full)(ctlr_info_t *h);
22 unsigned long (*intr_pending)(ctlr_info_t *h);
23 unsigned long (*command_completed)(ctlr_info_t *h);
25 typedef struct _drive_info_struct
29 struct request_queue *queue;
35 int raid_level; /* set to -1 to indicate that
36 * the drive is not in use/configured
38 int busy_configuring; /*This is set when the drive is being removed
39 *to prevent it from being opened or it's queue
42 __u8 serial_no[16]; /* from inquiry page 0x83, */
43 /* not necc. null terminated. */
46 #ifdef CONFIG_CISS_SCSI_TAPE
48 struct sendcmd_reject_list {
50 unsigned long *complete; /* array of NR_CMDS tags */
59 char firm_ver[4]; // Firmware version
64 int nr_cmds; /* Number of commands allowed on this controller */
65 CfgTable_struct __iomem *cfgtable;
66 int interrupts_enabled;
69 int commands_outstanding;
70 int max_outstanding; /* Debug */
73 int usage_count; /* number of opens all all minor devices */
74 # define DOORBELL_INT 0
75 # define PERF_MODE_INT 1
76 # define SIMPLE_MODE_INT 2
77 # define MEMQ_MODE_INT 3
79 unsigned int msix_vector;
80 unsigned int msi_vector;
81 int cciss_max_sectors;
84 BYTE cciss_read_capacity;
86 // information about each logical volume
87 drive_info_struct drv[CISS_MAX_LUN];
89 struct access_method access;
91 /* queue and queue Info */
92 struct hlist_head reqQ;
93 struct hlist_head cmpQ;
95 unsigned int maxQsinceinit;
99 //* pointers to command and error info pool */
100 CommandList_struct *cmd_pool;
101 dma_addr_t cmd_pool_dhandle;
102 ErrorInfo_struct *errinfo_pool;
103 dma_addr_t errinfo_pool_dhandle;
104 unsigned long *cmd_pool_bits;
107 int busy_configuring;
108 int busy_initializing;
110 /* This element holds the zero based queue number of the last
111 * queue to be started. It is used for fairness.
115 // Disk structures we need to pass back
116 struct gendisk *gendisk[CISS_MAX_LUN];
117 #ifdef CONFIG_CISS_SCSI_TAPE
118 void *scsi_ctlr; /* ptr to structure containing scsi related stuff */
119 /* list of block side commands the scsi error handling sucked up */
120 /* and saved for later processing */
121 struct sendcmd_reject_list scsi_rejects;
124 struct completion *rescan_wait;
125 struct task_struct *cciss_scan_thread;
128 /* Defining the diffent access_menthods */
130 * Memory mapped FIFO interface (SMART 53xx cards)
132 #define SA5_DOORBELL 0x20
133 #define SA5_REQUEST_PORT_OFFSET 0x40
134 #define SA5_REPLY_INTR_MASK_OFFSET 0x34
135 #define SA5_REPLY_PORT_OFFSET 0x44
136 #define SA5_INTR_STATUS 0x30
137 #define SA5_SCRATCHPAD_OFFSET 0xB0
139 #define SA5_CTCFG_OFFSET 0xB4
140 #define SA5_CTMEM_OFFSET 0xB8
142 #define SA5_INTR_OFF 0x08
143 #define SA5B_INTR_OFF 0x04
144 #define SA5_INTR_PENDING 0x08
145 #define SA5B_INTR_PENDING 0x04
146 #define FIFO_EMPTY 0xffffffff
147 #define CCISS_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */
149 #define CISS_ERROR_BIT 0x02
151 #define CCISS_INTR_ON 1
152 #define CCISS_INTR_OFF 0
154 Send the command to the hardware
156 static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c)
159 printk("Sending %x - down to controller\n", c->busaddr );
160 #endif /* CCISS_DEBUG */
161 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
162 h->commands_outstanding++;
163 if ( h->commands_outstanding > h->max_outstanding)
164 h->max_outstanding = h->commands_outstanding;
168 * This card is the opposite of the other cards.
169 * 0 turns interrupts on...
170 * 0x08 turns them off...
172 static void SA5_intr_mask(ctlr_info_t *h, unsigned long val)
175 { /* Turn interrupts on */
176 h->interrupts_enabled = 1;
177 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
178 } else /* Turn them off */
180 h->interrupts_enabled = 0;
181 writel( SA5_INTR_OFF,
182 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
186 * This card is the opposite of the other cards.
187 * 0 turns interrupts on...
188 * 0x04 turns them off...
190 static void SA5B_intr_mask(ctlr_info_t *h, unsigned long val)
193 { /* Turn interrupts on */
194 h->interrupts_enabled = 1;
195 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
196 } else /* Turn them off */
198 h->interrupts_enabled = 0;
199 writel( SA5B_INTR_OFF,
200 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
204 * Returns true if fifo is full.
207 static unsigned long SA5_fifo_full(ctlr_info_t *h)
209 if( h->commands_outstanding >= h->max_commands)
216 * returns value read from hardware.
217 * returns FIFO_EMPTY if there is nothing to read
219 static unsigned long SA5_completed(ctlr_info_t *h)
221 unsigned long register_value
222 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
223 if(register_value != FIFO_EMPTY)
225 h->commands_outstanding--;
227 printk("cciss: Read %lx back from board\n", register_value);
228 #endif /* CCISS_DEBUG */
233 printk("cciss: FIFO Empty read\n");
236 return ( register_value);
240 * Returns true if an interrupt is pending..
242 static unsigned long SA5_intr_pending(ctlr_info_t *h)
244 unsigned long register_value =
245 readl(h->vaddr + SA5_INTR_STATUS);
247 printk("cciss: intr_pending %lx\n", register_value);
248 #endif /* CCISS_DEBUG */
249 if( register_value & SA5_INTR_PENDING)
255 * Returns true if an interrupt is pending..
257 static unsigned long SA5B_intr_pending(ctlr_info_t *h)
259 unsigned long register_value =
260 readl(h->vaddr + SA5_INTR_STATUS);
262 printk("cciss: intr_pending %lx\n", register_value);
263 #endif /* CCISS_DEBUG */
264 if( register_value & SA5B_INTR_PENDING)
270 static struct access_method SA5_access = {
278 static struct access_method SA5B_access = {
289 struct access_method *access;
290 int nr_cmds; /* Max cmds this kind of ctlr can handle. */
293 #define CCISS_LOCK(i) (&hba[i]->lock)