4 #include <linux/genhd.h>
5 #include <linux/mutex.h>
11 #define MAX_PART (1 << NWD_SHIFT)
15 #define IO_NEEDS_RETRY 3
22 typedef struct ctlr_info ctlr_info_t;
24 struct access_method {
25 void (*submit_command)(ctlr_info_t *h, CommandList_struct *c);
26 void (*set_intr_mask)(ctlr_info_t *h, unsigned long val);
27 unsigned long (*fifo_full)(ctlr_info_t *h);
28 unsigned long (*intr_pending)(ctlr_info_t *h);
29 unsigned long (*command_completed)(ctlr_info_t *h);
31 typedef struct _drive_info_struct
35 struct request_queue *queue;
41 int raid_level; /* set to -1 to indicate that
42 * the drive is not in use/configured
44 int busy_configuring; /* This is set when a drive is being removed
45 * to prevent it from being opened or it's
46 * queue from being started.
49 __u8 serial_no[16]; /* from inquiry page 0x83,
50 * not necc. null terminated.
52 char vendor[VENDOR_LEN + 1]; /* SCSI vendor string */
53 char model[MODEL_LEN + 1]; /* SCSI model string */
54 char rev[REV_LEN + 1]; /* SCSI revision string */
62 char firm_ver[4]; // Firmware version
67 int nr_cmds; /* Number of commands allowed on this controller */
68 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 */
77 # define DOORBELL_INT 0
78 # define PERF_MODE_INT 1
79 # define SIMPLE_MODE_INT 2
80 # define MEMQ_MODE_INT 3
82 unsigned int msix_vector;
83 unsigned int msi_vector;
84 int cciss_max_sectors;
87 BYTE cciss_read_capacity;
89 // information about each logical volume
90 drive_info_struct drv[CISS_MAX_LUN];
92 struct access_method access;
94 /* queue and queue Info */
95 struct hlist_head reqQ;
96 struct hlist_head cmpQ;
98 unsigned int maxQsinceinit;
102 //* pointers to command and error info pool */
103 CommandList_struct *cmd_pool;
104 dma_addr_t cmd_pool_dhandle;
105 ErrorInfo_struct *errinfo_pool;
106 dma_addr_t errinfo_pool_dhandle;
107 unsigned long *cmd_pool_bits;
110 int busy_configuring;
111 int busy_initializing;
113 struct mutex busy_shutting_down;
115 /* This element holds the zero based queue number of the last
116 * queue to be started. It is used for fairness.
120 // Disk structures we need to pass back
121 struct gendisk *gendisk[CISS_MAX_LUN];
122 #ifdef CONFIG_CISS_SCSI_TAPE
123 void *scsi_ctlr; /* ptr to structure containing scsi related stuff */
124 /* list of block side commands the scsi error handling sucked up */
125 /* and saved for later processing */
128 struct list_head scan_list;
129 struct completion scan_wait;
133 /* Defining the diffent access_menthods */
135 * Memory mapped FIFO interface (SMART 53xx cards)
137 #define SA5_DOORBELL 0x20
138 #define SA5_REQUEST_PORT_OFFSET 0x40
139 #define SA5_REPLY_INTR_MASK_OFFSET 0x34
140 #define SA5_REPLY_PORT_OFFSET 0x44
141 #define SA5_INTR_STATUS 0x30
142 #define SA5_SCRATCHPAD_OFFSET 0xB0
144 #define SA5_CTCFG_OFFSET 0xB4
145 #define SA5_CTMEM_OFFSET 0xB8
147 #define SA5_INTR_OFF 0x08
148 #define SA5B_INTR_OFF 0x04
149 #define SA5_INTR_PENDING 0x08
150 #define SA5B_INTR_PENDING 0x04
151 #define FIFO_EMPTY 0xffffffff
152 #define CCISS_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */
154 #define CISS_ERROR_BIT 0x02
156 #define CCISS_INTR_ON 1
157 #define CCISS_INTR_OFF 0
159 Send the command to the hardware
161 static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c)
164 printk("Sending %x - down to controller\n", c->busaddr );
165 #endif /* CCISS_DEBUG */
166 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
167 h->commands_outstanding++;
168 if ( h->commands_outstanding > h->max_outstanding)
169 h->max_outstanding = h->commands_outstanding;
173 * This card is the opposite of the other cards.
174 * 0 turns interrupts on...
175 * 0x08 turns them off...
177 static void SA5_intr_mask(ctlr_info_t *h, unsigned long val)
180 { /* Turn interrupts on */
181 h->interrupts_enabled = 1;
182 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
183 } else /* Turn them off */
185 h->interrupts_enabled = 0;
186 writel( SA5_INTR_OFF,
187 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
191 * This card is the opposite of the other cards.
192 * 0 turns interrupts on...
193 * 0x04 turns them off...
195 static void SA5B_intr_mask(ctlr_info_t *h, unsigned long val)
198 { /* Turn interrupts on */
199 h->interrupts_enabled = 1;
200 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
201 } else /* Turn them off */
203 h->interrupts_enabled = 0;
204 writel( SA5B_INTR_OFF,
205 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
209 * Returns true if fifo is full.
212 static unsigned long SA5_fifo_full(ctlr_info_t *h)
214 if( h->commands_outstanding >= h->max_commands)
221 * returns value read from hardware.
222 * returns FIFO_EMPTY if there is nothing to read
224 static unsigned long SA5_completed(ctlr_info_t *h)
226 unsigned long register_value
227 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
228 if(register_value != FIFO_EMPTY)
230 h->commands_outstanding--;
232 printk("cciss: Read %lx back from board\n", register_value);
233 #endif /* CCISS_DEBUG */
238 printk("cciss: FIFO Empty read\n");
241 return ( register_value);
245 * Returns true if an interrupt is pending..
247 static unsigned long SA5_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 & SA5_INTR_PENDING)
260 * Returns true if an interrupt is pending..
262 static unsigned long SA5B_intr_pending(ctlr_info_t *h)
264 unsigned long register_value =
265 readl(h->vaddr + SA5_INTR_STATUS);
267 printk("cciss: intr_pending %lx\n", register_value);
268 #endif /* CCISS_DEBUG */
269 if( register_value & SA5B_INTR_PENDING)
275 static struct access_method SA5_access = {
283 static struct access_method SA5B_access = {
294 struct access_method *access;
295 int nr_cmds; /* Max cmds this kind of ctlr can handle. */
298 #define CCISS_LOCK(i) (&hba[i]->lock)