4 #include <linux/genhd.h>
10 #define MAX_PART (1 << NWD_SHIFT)
14 #define IO_NEEDS_RETRY 3
21 typedef struct ctlr_info ctlr_info_t;
23 struct access_method {
24 void (*submit_command)(ctlr_info_t *h, CommandList_struct *c);
25 void (*set_intr_mask)(ctlr_info_t *h, unsigned long val);
26 unsigned long (*fifo_full)(ctlr_info_t *h);
27 unsigned long (*intr_pending)(ctlr_info_t *h);
28 unsigned long (*command_completed)(ctlr_info_t *h);
30 typedef struct _drive_info_struct
34 struct request_queue *queue;
40 int raid_level; /* set to -1 to indicate that
41 * the drive is not in use/configured
43 int busy_configuring; /* This is set when a drive is being removed
44 * to prevent it from being opened or it's
45 * queue from being started.
48 __u8 serial_no[16]; /* from inquiry page 0x83,
49 * not necc. null terminated.
51 char vendor[VENDOR_LEN + 1]; /* SCSI vendor string */
52 char model[MODEL_LEN + 1]; /* SCSI model string */
53 char rev[REV_LEN + 1]; /* SCSI revision string */
56 #ifdef CONFIG_CISS_SCSI_TAPE
58 struct sendcmd_reject_list {
60 unsigned long *complete; /* array of NR_CMDS tags */
69 char firm_ver[4]; // Firmware version
74 int nr_cmds; /* Number of commands allowed on this controller */
75 CfgTable_struct __iomem *cfgtable;
76 int interrupts_enabled;
79 int commands_outstanding;
80 int max_outstanding; /* Debug */
83 int usage_count; /* number of opens all all minor devices */
84 # define DOORBELL_INT 0
85 # define PERF_MODE_INT 1
86 # define SIMPLE_MODE_INT 2
87 # define MEMQ_MODE_INT 3
89 unsigned int msix_vector;
90 unsigned int msi_vector;
91 int cciss_max_sectors;
94 BYTE cciss_read_capacity;
96 // information about each logical volume
97 drive_info_struct drv[CISS_MAX_LUN];
99 struct access_method access;
101 /* queue and queue Info */
102 struct hlist_head reqQ;
103 struct hlist_head cmpQ;
105 unsigned int maxQsinceinit;
109 //* pointers to command and error info pool */
110 CommandList_struct *cmd_pool;
111 dma_addr_t cmd_pool_dhandle;
112 ErrorInfo_struct *errinfo_pool;
113 dma_addr_t errinfo_pool_dhandle;
114 unsigned long *cmd_pool_bits;
117 int busy_configuring;
118 int busy_initializing;
120 /* This element holds the zero based queue number of the last
121 * queue to be started. It is used for fairness.
125 // Disk structures we need to pass back
126 struct gendisk *gendisk[CISS_MAX_LUN];
127 #ifdef CONFIG_CISS_SCSI_TAPE
128 void *scsi_ctlr; /* ptr to structure containing scsi related stuff */
129 /* list of block side commands the scsi error handling sucked up */
130 /* and saved for later processing */
131 struct sendcmd_reject_list scsi_rejects;
134 struct completion *rescan_wait;
135 struct task_struct *cciss_scan_thread;
139 /* Defining the diffent access_menthods */
141 * Memory mapped FIFO interface (SMART 53xx cards)
143 #define SA5_DOORBELL 0x20
144 #define SA5_REQUEST_PORT_OFFSET 0x40
145 #define SA5_REPLY_INTR_MASK_OFFSET 0x34
146 #define SA5_REPLY_PORT_OFFSET 0x44
147 #define SA5_INTR_STATUS 0x30
148 #define SA5_SCRATCHPAD_OFFSET 0xB0
150 #define SA5_CTCFG_OFFSET 0xB4
151 #define SA5_CTMEM_OFFSET 0xB8
153 #define SA5_INTR_OFF 0x08
154 #define SA5B_INTR_OFF 0x04
155 #define SA5_INTR_PENDING 0x08
156 #define SA5B_INTR_PENDING 0x04
157 #define FIFO_EMPTY 0xffffffff
158 #define CCISS_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */
160 #define CISS_ERROR_BIT 0x02
162 #define CCISS_INTR_ON 1
163 #define CCISS_INTR_OFF 0
165 Send the command to the hardware
167 static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c)
170 printk("Sending %x - down to controller\n", c->busaddr );
171 #endif /* CCISS_DEBUG */
172 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
173 h->commands_outstanding++;
174 if ( h->commands_outstanding > h->max_outstanding)
175 h->max_outstanding = h->commands_outstanding;
179 * This card is the opposite of the other cards.
180 * 0 turns interrupts on...
181 * 0x08 turns them off...
183 static void SA5_intr_mask(ctlr_info_t *h, unsigned long val)
186 { /* Turn interrupts on */
187 h->interrupts_enabled = 1;
188 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
189 } else /* Turn them off */
191 h->interrupts_enabled = 0;
192 writel( SA5_INTR_OFF,
193 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
197 * This card is the opposite of the other cards.
198 * 0 turns interrupts on...
199 * 0x04 turns them off...
201 static void SA5B_intr_mask(ctlr_info_t *h, unsigned long val)
204 { /* Turn interrupts on */
205 h->interrupts_enabled = 1;
206 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
207 } else /* Turn them off */
209 h->interrupts_enabled = 0;
210 writel( SA5B_INTR_OFF,
211 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
215 * Returns true if fifo is full.
218 static unsigned long SA5_fifo_full(ctlr_info_t *h)
220 if( h->commands_outstanding >= h->max_commands)
227 * returns value read from hardware.
228 * returns FIFO_EMPTY if there is nothing to read
230 static unsigned long SA5_completed(ctlr_info_t *h)
232 unsigned long register_value
233 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
234 if(register_value != FIFO_EMPTY)
236 h->commands_outstanding--;
238 printk("cciss: Read %lx back from board\n", register_value);
239 #endif /* CCISS_DEBUG */
244 printk("cciss: FIFO Empty read\n");
247 return ( register_value);
251 * Returns true if an interrupt is pending..
253 static unsigned long SA5_intr_pending(ctlr_info_t *h)
255 unsigned long register_value =
256 readl(h->vaddr + SA5_INTR_STATUS);
258 printk("cciss: intr_pending %lx\n", register_value);
259 #endif /* CCISS_DEBUG */
260 if( register_value & SA5_INTR_PENDING)
266 * Returns true if an interrupt is pending..
268 static unsigned long SA5B_intr_pending(ctlr_info_t *h)
270 unsigned long register_value =
271 readl(h->vaddr + SA5_INTR_STATUS);
273 printk("cciss: intr_pending %lx\n", register_value);
274 #endif /* CCISS_DEBUG */
275 if( register_value & SA5B_INTR_PENDING)
281 static struct access_method SA5_access = {
289 static struct access_method SA5B_access = {
300 struct access_method *access;
301 int nr_cmds; /* Max cmds this kind of ctlr can handle. */
304 #define CCISS_LOCK(i) (&hba[i]->lock)