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
44 #ifdef CONFIG_CISS_SCSI_TAPE
46 struct sendcmd_reject_list {
48 unsigned long *complete; /* array of NR_CMDS tags */
57 char firm_ver[4]; // Firmware version
62 int nr_cmds; /* Number of commands allowed on this controller */
63 CfgTable_struct __iomem *cfgtable;
64 int interrupts_enabled;
67 int commands_outstanding;
68 int max_outstanding; /* Debug */
71 int usage_count; /* number of opens all all minor devices */
72 # define DOORBELL_INT 0
73 # define PERF_MODE_INT 1
74 # define SIMPLE_MODE_INT 2
75 # define MEMQ_MODE_INT 3
77 unsigned int msix_vector;
78 unsigned int msi_vector;
79 int cciss_max_sectors;
82 BYTE cciss_read_capacity;
84 // information about each logical volume
85 drive_info_struct drv[CISS_MAX_LUN];
87 struct access_method access;
89 /* queue and queue Info */
90 CommandList_struct *reqQ;
91 CommandList_struct *cmpQ;
93 unsigned int maxQsinceinit;
97 //* pointers to command and error info pool */
98 CommandList_struct *cmd_pool;
99 dma_addr_t cmd_pool_dhandle;
100 ErrorInfo_struct *errinfo_pool;
101 dma_addr_t errinfo_pool_dhandle;
102 unsigned long *cmd_pool_bits;
105 int busy_configuring;
106 int busy_initializing;
108 /* This element holds the zero based queue number of the last
109 * queue to be started. It is used for fairness.
113 // Disk structures we need to pass back
114 struct gendisk *gendisk[CISS_MAX_LUN];
115 #ifdef CONFIG_CISS_SCSI_TAPE
116 void *scsi_ctlr; /* ptr to structure containing scsi related stuff */
117 /* list of block side commands the scsi error handling sucked up */
118 /* and saved for later processing */
119 struct sendcmd_reject_list scsi_rejects;
124 /* Defining the diffent access_menthods */
126 * Memory mapped FIFO interface (SMART 53xx cards)
128 #define SA5_DOORBELL 0x20
129 #define SA5_REQUEST_PORT_OFFSET 0x40
130 #define SA5_REPLY_INTR_MASK_OFFSET 0x34
131 #define SA5_REPLY_PORT_OFFSET 0x44
132 #define SA5_INTR_STATUS 0x30
133 #define SA5_SCRATCHPAD_OFFSET 0xB0
135 #define SA5_CTCFG_OFFSET 0xB4
136 #define SA5_CTMEM_OFFSET 0xB8
138 #define SA5_INTR_OFF 0x08
139 #define SA5B_INTR_OFF 0x04
140 #define SA5_INTR_PENDING 0x08
141 #define SA5B_INTR_PENDING 0x04
142 #define FIFO_EMPTY 0xffffffff
143 #define CCISS_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */
145 #define CISS_ERROR_BIT 0x02
147 #define CCISS_INTR_ON 1
148 #define CCISS_INTR_OFF 0
150 Send the command to the hardware
152 static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c)
155 printk("Sending %x - down to controller\n", c->busaddr );
156 #endif /* CCISS_DEBUG */
157 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
158 h->commands_outstanding++;
159 if ( h->commands_outstanding > h->max_outstanding)
160 h->max_outstanding = h->commands_outstanding;
164 * This card is the opposite of the other cards.
165 * 0 turns interrupts on...
166 * 0x08 turns them off...
168 static void SA5_intr_mask(ctlr_info_t *h, unsigned long val)
171 { /* Turn interrupts on */
172 h->interrupts_enabled = 1;
173 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
174 } else /* Turn them off */
176 h->interrupts_enabled = 0;
177 writel( SA5_INTR_OFF,
178 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
182 * This card is the opposite of the other cards.
183 * 0 turns interrupts on...
184 * 0x04 turns them off...
186 static void SA5B_intr_mask(ctlr_info_t *h, unsigned long val)
189 { /* Turn interrupts on */
190 h->interrupts_enabled = 1;
191 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
192 } else /* Turn them off */
194 h->interrupts_enabled = 0;
195 writel( SA5B_INTR_OFF,
196 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
200 * Returns true if fifo is full.
203 static unsigned long SA5_fifo_full(ctlr_info_t *h)
205 if( h->commands_outstanding >= h->max_commands)
212 * returns value read from hardware.
213 * returns FIFO_EMPTY if there is nothing to read
215 static unsigned long SA5_completed(ctlr_info_t *h)
217 unsigned long register_value
218 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
219 if(register_value != FIFO_EMPTY)
221 h->commands_outstanding--;
223 printk("cciss: Read %lx back from board\n", register_value);
224 #endif /* CCISS_DEBUG */
229 printk("cciss: FIFO Empty read\n");
232 return ( register_value);
236 * Returns true if an interrupt is pending..
238 static unsigned long SA5_intr_pending(ctlr_info_t *h)
240 unsigned long register_value =
241 readl(h->vaddr + SA5_INTR_STATUS);
243 printk("cciss: intr_pending %lx\n", register_value);
244 #endif /* CCISS_DEBUG */
245 if( register_value & SA5_INTR_PENDING)
251 * Returns true if an interrupt is pending..
253 static unsigned long SA5B_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 & SA5B_INTR_PENDING)
266 static struct access_method SA5_access = {
274 static struct access_method SA5B_access = {
285 struct access_method *access;
286 int nr_cmds; /* Max cmds this kind of ctlr can handle. */
289 #define CCISS_LOCK(i) (&hba[i]->lock)