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
33 unsigned char LunID[8];
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 */
55 char device_initialized; /* indicates whether dev is initialized */
63 char firm_ver[4]; /* Firmware version */
68 int nr_cmds; /* Number of commands allowed on this controller */
69 CfgTable_struct __iomem *cfgtable;
70 int interrupts_enabled;
73 int commands_outstanding;
74 int max_outstanding; /* Debug */
77 int usage_count; /* number of opens all all minor devices */
78 /* Need space for temp sg list
79 * number of scatter/gathers supported
80 * number of scatter/gathers in chained block
82 struct scatterlist **scatter_list;
85 int max_cmd_sgentries;
86 SGDescriptor_struct **cmd_sg_list;
88 # define DOORBELL_INT 0
89 # define PERF_MODE_INT 1
90 # define SIMPLE_MODE_INT 2
91 # define MEMQ_MODE_INT 3
93 unsigned int msix_vector;
94 unsigned int msi_vector;
95 int cciss_max_sectors;
98 BYTE cciss_read_capacity;
100 /* information about each logical volume */
101 drive_info_struct *drv[CISS_MAX_LUN];
103 struct access_method access;
105 /* queue and queue Info */
106 struct hlist_head reqQ;
107 struct hlist_head cmpQ;
109 unsigned int maxQsinceinit;
113 /* pointers to command and error info pool */
114 CommandList_struct *cmd_pool;
115 dma_addr_t cmd_pool_dhandle;
116 ErrorInfo_struct *errinfo_pool;
117 dma_addr_t errinfo_pool_dhandle;
118 unsigned long *cmd_pool_bits;
121 int busy_configuring;
122 int busy_initializing;
124 struct mutex busy_shutting_down;
126 /* This element holds the zero based queue number of the last
127 * queue to be started. It is used for fairness.
131 /* Disk structures we need to pass back */
132 struct gendisk *gendisk[CISS_MAX_LUN];
133 #ifdef CONFIG_CISS_SCSI_TAPE
134 void *scsi_ctlr; /* ptr to structure containing scsi related stuff */
135 /* list of block side commands the scsi error handling sucked up */
136 /* and saved for later processing */
139 struct list_head scan_list;
140 struct completion scan_wait;
144 /* Defining the diffent access_menthods */
146 * Memory mapped FIFO interface (SMART 53xx cards)
148 #define SA5_DOORBELL 0x20
149 #define SA5_REQUEST_PORT_OFFSET 0x40
150 #define SA5_REPLY_INTR_MASK_OFFSET 0x34
151 #define SA5_REPLY_PORT_OFFSET 0x44
152 #define SA5_INTR_STATUS 0x30
153 #define SA5_SCRATCHPAD_OFFSET 0xB0
155 #define SA5_CTCFG_OFFSET 0xB4
156 #define SA5_CTMEM_OFFSET 0xB8
158 #define SA5_INTR_OFF 0x08
159 #define SA5B_INTR_OFF 0x04
160 #define SA5_INTR_PENDING 0x08
161 #define SA5B_INTR_PENDING 0x04
162 #define FIFO_EMPTY 0xffffffff
163 #define CCISS_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */
165 #define CISS_ERROR_BIT 0x02
167 #define CCISS_INTR_ON 1
168 #define CCISS_INTR_OFF 0
170 Send the command to the hardware
172 static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c)
175 printk("Sending %x - down to controller\n", c->busaddr );
176 #endif /* CCISS_DEBUG */
177 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
178 h->commands_outstanding++;
179 if ( h->commands_outstanding > h->max_outstanding)
180 h->max_outstanding = h->commands_outstanding;
184 * This card is the opposite of the other cards.
185 * 0 turns interrupts on...
186 * 0x08 turns them off...
188 static void SA5_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( SA5_INTR_OFF,
198 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
202 * This card is the opposite of the other cards.
203 * 0 turns interrupts on...
204 * 0x04 turns them off...
206 static void SA5B_intr_mask(ctlr_info_t *h, unsigned long val)
209 { /* Turn interrupts on */
210 h->interrupts_enabled = 1;
211 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
212 } else /* Turn them off */
214 h->interrupts_enabled = 0;
215 writel( SA5B_INTR_OFF,
216 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
220 * Returns true if fifo is full.
223 static unsigned long SA5_fifo_full(ctlr_info_t *h)
225 if( h->commands_outstanding >= h->max_commands)
232 * returns value read from hardware.
233 * returns FIFO_EMPTY if there is nothing to read
235 static unsigned long SA5_completed(ctlr_info_t *h)
237 unsigned long register_value
238 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
239 if(register_value != FIFO_EMPTY)
241 h->commands_outstanding--;
243 printk("cciss: Read %lx back from board\n", register_value);
244 #endif /* CCISS_DEBUG */
249 printk("cciss: FIFO Empty read\n");
252 return ( register_value);
256 * Returns true if an interrupt is pending..
258 static unsigned long SA5_intr_pending(ctlr_info_t *h)
260 unsigned long register_value =
261 readl(h->vaddr + SA5_INTR_STATUS);
263 printk("cciss: intr_pending %lx\n", register_value);
264 #endif /* CCISS_DEBUG */
265 if( register_value & SA5_INTR_PENDING)
271 * Returns true if an interrupt is pending..
273 static unsigned long SA5B_intr_pending(ctlr_info_t *h)
275 unsigned long register_value =
276 readl(h->vaddr + SA5_INTR_STATUS);
278 printk("cciss: intr_pending %lx\n", register_value);
279 #endif /* CCISS_DEBUG */
280 if( register_value & SA5B_INTR_PENDING)
286 static struct access_method SA5_access = {
294 static struct access_method SA5B_access = {
305 struct access_method *access;
306 int nr_cmds; /* Max cmds this kind of ctlr can handle. */
309 #define CCISS_LOCK(i) (&hba[i]->lock)