4 #include <linux/interrupt.h>
5 #include <linux/spinlock.h>
6 #include <linux/blkdev.h>
7 #include <linux/genhd.h>
8 #include <linux/list.h>
10 #include <asm/debug.h>
13 #define SCM_NR_PARTS 8
14 #define SCM_QUEUE_DELAY 5
17 struct tasklet_struct tasklet;
18 struct request_queue *rq;
19 struct gendisk *gendisk;
20 struct scm_device *scmdev;
21 spinlock_t rq_lock; /* guard the request queue */
22 spinlock_t lock; /* guard the rest of the blockdev */
24 enum {SCM_OPER, SCM_WR_PROHIBIT} state;
25 struct list_head finished_requests;
26 #ifdef CONFIG_SCM_BLOCK_CLUSTER_WRITE
27 struct list_head cluster_list;
32 struct scm_blk_dev *bdev;
33 struct aidaw *next_aidaw;
34 struct request **request;
36 struct list_head list;
39 #ifdef CONFIG_SCM_BLOCK_CLUSTER_WRITE
41 enum {CLUSTER_NONE, CLUSTER_READ, CLUSTER_WRITE} state;
42 struct list_head list;
48 #define to_aobrq(rq) container_of((void *) rq, struct aob_rq_header, data)
50 int scm_blk_dev_setup(struct scm_blk_dev *, struct scm_device *);
51 void scm_blk_dev_cleanup(struct scm_blk_dev *);
52 void scm_blk_set_available(struct scm_blk_dev *);
53 void scm_blk_irq(struct scm_device *, void *, int);
55 void scm_request_finish(struct scm_request *);
56 void scm_request_requeue(struct scm_request *);
58 struct aidaw *scm_aidaw_fetch(struct scm_request *scmrq, unsigned int bytes);
60 int scm_drv_init(void);
61 void scm_drv_cleanup(void);
63 #ifdef CONFIG_SCM_BLOCK_CLUSTER_WRITE
64 void __scm_free_rq_cluster(struct scm_request *);
65 int __scm_alloc_rq_cluster(struct scm_request *);
66 void scm_request_cluster_init(struct scm_request *);
67 bool scm_reserve_cluster(struct scm_request *);
68 void scm_release_cluster(struct scm_request *);
69 void scm_blk_dev_cluster_setup(struct scm_blk_dev *);
70 bool scm_need_cluster_request(struct scm_request *);
71 void scm_initiate_cluster_request(struct scm_request *);
72 void scm_cluster_request_irq(struct scm_request *);
73 bool scm_test_cluster_request(struct scm_request *);
74 bool scm_cluster_size_valid(void);
75 #else /* CONFIG_SCM_BLOCK_CLUSTER_WRITE */
76 static inline void __scm_free_rq_cluster(struct scm_request *scmrq) {}
77 static inline int __scm_alloc_rq_cluster(struct scm_request *scmrq)
81 static inline void scm_request_cluster_init(struct scm_request *scmrq) {}
82 static inline bool scm_reserve_cluster(struct scm_request *scmrq)
86 static inline void scm_release_cluster(struct scm_request *scmrq) {}
87 static inline void scm_blk_dev_cluster_setup(struct scm_blk_dev *bdev) {}
88 static inline bool scm_need_cluster_request(struct scm_request *scmrq)
92 static inline void scm_initiate_cluster_request(struct scm_request *scmrq) {}
93 static inline void scm_cluster_request_irq(struct scm_request *scmrq) {}
94 static inline bool scm_test_cluster_request(struct scm_request *scmrq)
98 static inline bool scm_cluster_size_valid(void)
102 #endif /* CONFIG_SCM_BLOCK_CLUSTER_WRITE */
104 extern debug_info_t *scm_debug;
106 #define SCM_LOG(imp, txt) do { \
107 debug_text_event(scm_debug, imp, txt); \
110 static inline void SCM_LOG_HEX(int level, void *data, int length)
112 if (!debug_level_enabled(scm_debug, level))
115 debug_event(scm_debug, level, data, length);
116 length -= scm_debug->buf_size;
117 data += scm_debug->buf_size;
121 static inline void SCM_LOG_STATE(int level, struct scm_device *scmdev)
128 .address = scmdev->address,
129 .oper_state = scmdev->attrs.oper_state,
130 .rank = scmdev->attrs.rank,
133 SCM_LOG_HEX(level, &data, sizeof(data));
136 #endif /* SCM_BLK_H */