4 #include <linux/genhd.h>
11 #define MAX_PART (1 << NWD_SHIFT)
17 typedef struct ctlr_info ctlr_info_t;
19 struct access_method {
20 void (*submit_command)(ctlr_info_t *h, CommandList_struct *c);
21 void (*set_intr_mask)(ctlr_info_t *h, unsigned long val);
22 unsigned long (*fifo_full)(ctlr_info_t *h);
23 unsigned long (*intr_pending)(ctlr_info_t *h);
24 unsigned long (*command_completed)(ctlr_info_t *h);
26 typedef struct _drive_info_struct
30 struct request_queue *queue;
36 int raid_level; /* set to -1 to indicate that
37 * the drive is not in use/configured
39 int busy_configuring; /*This is set when the drive is being removed
40 *to prevent it from being opened or it's queue
45 #ifdef CONFIG_CISS_SCSI_TAPE
47 struct sendcmd_reject_list {
49 unsigned long *complete; /* array of NR_CMDS tags */
58 char firm_ver[4]; // Firmware version
63 int nr_cmds; /* Number of commands allowed on this controller */
64 CfgTable_struct __iomem *cfgtable;
65 int interrupts_enabled;
68 int commands_outstanding;
69 int max_outstanding; /* Debug */
72 int usage_count; /* number of opens all all minor devices */
73 # define DOORBELL_INT 0
74 # define PERF_MODE_INT 1
75 # define SIMPLE_MODE_INT 2
76 # define MEMQ_MODE_INT 3
78 unsigned int msix_vector;
79 unsigned int msi_vector;
80 int cciss_max_sectors;
83 BYTE cciss_read_capacity;
85 // information about each logical volume
86 drive_info_struct drv[CISS_MAX_LUN];
88 struct access_method access;
90 /* queue and queue Info */
91 CommandList_struct *reqQ;
92 CommandList_struct *cmpQ;
94 unsigned int maxQsinceinit;
98 //* pointers to command and error info pool */
99 CommandList_struct *cmd_pool;
100 dma_addr_t cmd_pool_dhandle;
101 ErrorInfo_struct *errinfo_pool;
102 dma_addr_t errinfo_pool_dhandle;
103 unsigned long *cmd_pool_bits;
106 int busy_configuring;
107 int busy_initializing;
109 /* This element holds the zero based queue number of the last
110 * queue to be started. It is used for fairness.
114 // Disk structures we need to pass back
115 struct gendisk *gendisk[NWD];
116 #ifdef CONFIG_CISS_SCSI_TAPE
117 void *scsi_ctlr; /* ptr to structure containing scsi related stuff */
118 /* list of block side commands the scsi error handling sucked up */
119 /* and saved for later processing */
120 struct sendcmd_reject_list scsi_rejects;
125 /* Defining the diffent access_menthods */
127 * Memory mapped FIFO interface (SMART 53xx cards)
129 #define SA5_DOORBELL 0x20
130 #define SA5_REQUEST_PORT_OFFSET 0x40
131 #define SA5_REPLY_INTR_MASK_OFFSET 0x34
132 #define SA5_REPLY_PORT_OFFSET 0x44
133 #define SA5_INTR_STATUS 0x30
134 #define SA5_SCRATCHPAD_OFFSET 0xB0
136 #define SA5_CTCFG_OFFSET 0xB4
137 #define SA5_CTMEM_OFFSET 0xB8
139 #define SA5_INTR_OFF 0x08
140 #define SA5B_INTR_OFF 0x04
141 #define SA5_INTR_PENDING 0x08
142 #define SA5B_INTR_PENDING 0x04
143 #define FIFO_EMPTY 0xffffffff
144 #define CCISS_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */
146 #define CISS_ERROR_BIT 0x02
148 #define CCISS_INTR_ON 1
149 #define CCISS_INTR_OFF 0
151 Send the command to the hardware
153 static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c)
156 printk("Sending %x - down to controller\n", c->busaddr );
157 #endif /* CCISS_DEBUG */
158 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
159 h->commands_outstanding++;
160 if ( h->commands_outstanding > h->max_outstanding)
161 h->max_outstanding = h->commands_outstanding;
165 * This card is the opposite of the other cards.
166 * 0 turns interrupts on...
167 * 0x08 turns them off...
169 static void SA5_intr_mask(ctlr_info_t *h, unsigned long val)
172 { /* Turn interrupts on */
173 h->interrupts_enabled = 1;
174 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
175 } else /* Turn them off */
177 h->interrupts_enabled = 0;
178 writel( SA5_INTR_OFF,
179 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
183 * This card is the opposite of the other cards.
184 * 0 turns interrupts on...
185 * 0x04 turns them off...
187 static void SA5B_intr_mask(ctlr_info_t *h, unsigned long val)
190 { /* Turn interrupts on */
191 h->interrupts_enabled = 1;
192 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
193 } else /* Turn them off */
195 h->interrupts_enabled = 0;
196 writel( SA5B_INTR_OFF,
197 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
201 * Returns true if fifo is full.
204 static unsigned long SA5_fifo_full(ctlr_info_t *h)
206 if( h->commands_outstanding >= h->max_commands)
213 * returns value read from hardware.
214 * returns FIFO_EMPTY if there is nothing to read
216 static unsigned long SA5_completed(ctlr_info_t *h)
218 unsigned long register_value
219 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
220 if(register_value != FIFO_EMPTY)
222 h->commands_outstanding--;
224 printk("cciss: Read %lx back from board\n", register_value);
225 #endif /* CCISS_DEBUG */
230 printk("cciss: FIFO Empty read\n");
233 return ( register_value);
237 * Returns true if an interrupt is pending..
239 static unsigned long SA5_intr_pending(ctlr_info_t *h)
241 unsigned long register_value =
242 readl(h->vaddr + SA5_INTR_STATUS);
244 printk("cciss: intr_pending %lx\n", register_value);
245 #endif /* CCISS_DEBUG */
246 if( register_value & SA5_INTR_PENDING)
252 * Returns true if an interrupt is pending..
254 static unsigned long SA5B_intr_pending(ctlr_info_t *h)
256 unsigned long register_value =
257 readl(h->vaddr + SA5_INTR_STATUS);
259 printk("cciss: intr_pending %lx\n", register_value);
260 #endif /* CCISS_DEBUG */
261 if( register_value & SA5B_INTR_PENDING)
267 static struct access_method SA5_access = {
275 static struct access_method SA5B_access = {
286 struct access_method *access;
287 int nr_cmds; /* Max cmds this kind of ctlr can handle. */
290 #define CCISS_LOCK(i) (&hba[i]->lock)