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;
126 /* Defining the diffent access_menthods */
128 * Memory mapped FIFO interface (SMART 53xx cards)
130 #define SA5_DOORBELL 0x20
131 #define SA5_REQUEST_PORT_OFFSET 0x40
132 #define SA5_REPLY_INTR_MASK_OFFSET 0x34
133 #define SA5_REPLY_PORT_OFFSET 0x44
134 #define SA5_INTR_STATUS 0x30
135 #define SA5_SCRATCHPAD_OFFSET 0xB0
137 #define SA5_CTCFG_OFFSET 0xB4
138 #define SA5_CTMEM_OFFSET 0xB8
140 #define SA5_INTR_OFF 0x08
141 #define SA5B_INTR_OFF 0x04
142 #define SA5_INTR_PENDING 0x08
143 #define SA5B_INTR_PENDING 0x04
144 #define FIFO_EMPTY 0xffffffff
145 #define CCISS_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */
147 #define CISS_ERROR_BIT 0x02
149 #define CCISS_INTR_ON 1
150 #define CCISS_INTR_OFF 0
152 Send the command to the hardware
154 static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c)
157 printk("Sending %x - down to controller\n", c->busaddr );
158 #endif /* CCISS_DEBUG */
159 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
160 h->commands_outstanding++;
161 if ( h->commands_outstanding > h->max_outstanding)
162 h->max_outstanding = h->commands_outstanding;
166 * This card is the opposite of the other cards.
167 * 0 turns interrupts on...
168 * 0x08 turns them off...
170 static void SA5_intr_mask(ctlr_info_t *h, unsigned long val)
173 { /* Turn interrupts on */
174 h->interrupts_enabled = 1;
175 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
176 } else /* Turn them off */
178 h->interrupts_enabled = 0;
179 writel( SA5_INTR_OFF,
180 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
184 * This card is the opposite of the other cards.
185 * 0 turns interrupts on...
186 * 0x04 turns them off...
188 static void SA5B_intr_mask(ctlr_info_t *h, unsigned long val)
191 { /* Turn interrupts on */
192 h->interrupts_enabled = 1;
193 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
194 } else /* Turn them off */
196 h->interrupts_enabled = 0;
197 writel( SA5B_INTR_OFF,
198 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
202 * Returns true if fifo is full.
205 static unsigned long SA5_fifo_full(ctlr_info_t *h)
207 if( h->commands_outstanding >= h->max_commands)
214 * returns value read from hardware.
215 * returns FIFO_EMPTY if there is nothing to read
217 static unsigned long SA5_completed(ctlr_info_t *h)
219 unsigned long register_value
220 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
221 if(register_value != FIFO_EMPTY)
223 h->commands_outstanding--;
225 printk("cciss: Read %lx back from board\n", register_value);
226 #endif /* CCISS_DEBUG */
231 printk("cciss: FIFO Empty read\n");
234 return ( register_value);
238 * Returns true if an interrupt is pending..
240 static unsigned long SA5_intr_pending(ctlr_info_t *h)
242 unsigned long register_value =
243 readl(h->vaddr + SA5_INTR_STATUS);
245 printk("cciss: intr_pending %lx\n", register_value);
246 #endif /* CCISS_DEBUG */
247 if( register_value & SA5_INTR_PENDING)
253 * Returns true if an interrupt is pending..
255 static unsigned long SA5B_intr_pending(ctlr_info_t *h)
257 unsigned long register_value =
258 readl(h->vaddr + SA5_INTR_STATUS);
260 printk("cciss: intr_pending %lx\n", register_value);
261 #endif /* CCISS_DEBUG */
262 if( register_value & SA5B_INTR_PENDING)
268 static struct access_method SA5_access = {
276 static struct access_method SA5B_access = {
287 struct access_method *access;
288 int nr_cmds; /* Max cmds this kind of ctlr can handle. */
291 #define CCISS_LOCK(i) (&hba[i]->lock)