1 #ifndef SCM_BLK_H 2 #define SCM_BLK_H 3 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> 9 10 #include <asm/debug.h> 11 #include <asm/eadm.h> 12 13 #define SCM_NR_PARTS 8 14 #define SCM_QUEUE_DELAY 5 15 16 struct scm_blk_dev { 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 */ 23 atomic_t queued_reqs; 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; 28 #endif 29 }; 30 31 struct scm_request { 32 struct scm_blk_dev *bdev; 33 struct request *request; 34 struct aidaw *aidaw; 35 struct aob *aob; 36 struct list_head list; 37 u8 retries; 38 int error; 39 #ifdef CONFIG_SCM_BLOCK_CLUSTER_WRITE 40 struct { 41 enum {CLUSTER_NONE, CLUSTER_READ, CLUSTER_WRITE} state; 42 struct list_head list; 43 void **buf; 44 } cluster; 45 #endif 46 }; 47 48 #define to_aobrq(rq) container_of((void *) rq, struct aob_rq_header, data) 49 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); 54 55 void scm_request_finish(struct scm_request *); 56 void scm_request_requeue(struct scm_request *); 57 58 int scm_drv_init(void); 59 void scm_drv_cleanup(void); 60 61 #ifdef CONFIG_SCM_BLOCK_CLUSTER_WRITE 62 void __scm_free_rq_cluster(struct scm_request *); 63 int __scm_alloc_rq_cluster(struct scm_request *); 64 void scm_request_cluster_init(struct scm_request *); 65 bool scm_reserve_cluster(struct scm_request *); 66 void scm_release_cluster(struct scm_request *); 67 void scm_blk_dev_cluster_setup(struct scm_blk_dev *); 68 bool scm_need_cluster_request(struct scm_request *); 69 void scm_initiate_cluster_request(struct scm_request *); 70 void scm_cluster_request_irq(struct scm_request *); 71 bool scm_test_cluster_request(struct scm_request *); 72 bool scm_cluster_size_valid(void); 73 #else /* CONFIG_SCM_BLOCK_CLUSTER_WRITE */ 74 static inline void __scm_free_rq_cluster(struct scm_request *scmrq) {} 75 static inline int __scm_alloc_rq_cluster(struct scm_request *scmrq) 76 { 77 return 0; 78 } 79 static inline void scm_request_cluster_init(struct scm_request *scmrq) {} 80 static inline bool scm_reserve_cluster(struct scm_request *scmrq) 81 { 82 return true; 83 } 84 static inline void scm_release_cluster(struct scm_request *scmrq) {} 85 static inline void scm_blk_dev_cluster_setup(struct scm_blk_dev *bdev) {} 86 static inline bool scm_need_cluster_request(struct scm_request *scmrq) 87 { 88 return false; 89 } 90 static inline void scm_initiate_cluster_request(struct scm_request *scmrq) {} 91 static inline void scm_cluster_request_irq(struct scm_request *scmrq) {} 92 static inline bool scm_test_cluster_request(struct scm_request *scmrq) 93 { 94 return false; 95 } 96 static inline bool scm_cluster_size_valid(void) 97 { 98 return true; 99 } 100 #endif /* CONFIG_SCM_BLOCK_CLUSTER_WRITE */ 101 102 extern debug_info_t *scm_debug; 103 104 #define SCM_LOG(imp, txt) do { \ 105 debug_text_event(scm_debug, imp, txt); \ 106 } while (0) 107 108 static inline void SCM_LOG_HEX(int level, void *data, int length) 109 { 110 if (!debug_level_enabled(scm_debug, level)) 111 return; 112 while (length > 0) { 113 debug_event(scm_debug, level, data, length); 114 length -= scm_debug->buf_size; 115 data += scm_debug->buf_size; 116 } 117 } 118 119 static inline void SCM_LOG_STATE(int level, struct scm_device *scmdev) 120 { 121 struct { 122 u64 address; 123 u8 oper_state; 124 u8 rank; 125 } __packed data = { 126 .address = scmdev->address, 127 .oper_state = scmdev->attrs.oper_state, 128 .rank = scmdev->attrs.rank, 129 }; 130 131 SCM_LOG_HEX(level, &data, sizeof(data)); 132 } 133 134 #endif /* SCM_BLK_H */ 135