| /* |
| * File...........: linux/include/asm-s390/ccwcache.h |
| * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> |
| * Bugreports.to..: <Linux390@de.ibm.com> |
| * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2000 |
| * |
| * $Revision: 1.11 $ |
| * |
| */ |
| #ifndef CCWCACHE_H |
| #define CCWCACHE_H |
| #include <linux/slab.h> |
| #include <asm/irq.h> |
| |
| #ifndef __KERNEL__ |
| #define kmem_cache_t void |
| #endif /* __KERNEL__ */ |
| |
| typedef struct ccw_req_t { |
| /* eye catcher plus queueing information */ |
| unsigned int magic; |
| struct ccw_req_t *next; /* pointer to next ccw_req_t in queue */ |
| struct ccw_req_t *int_next; /* for internal queueing */ |
| struct ccw_req_t *int_prev; /* for internal queueing */ |
| |
| /* Where to execute what... */ |
| void *device; /* index of the device the req is for */ |
| void *req; /* pointer to originating request */ |
| ccw1_t *cpaddr; /* address of channel program */ |
| char status; /* reflecting the status of this request */ |
| char flags; /* see below */ |
| short retries; /* A retry counter to be set when filling */ |
| |
| /* ... and how */ |
| int options; /* options for execution */ |
| char lpm; /* logical path mask */ |
| void *data; /* pointer to data area */ |
| devstat_t *dstat; /* The device status in case of an error */ |
| |
| /* these are important for recovering erroneous requests */ |
| struct ccw_req_t *refers; /* Does this request refer to another one? */ |
| void *function; /* refers to the originating ERP action */ ; |
| |
| unsigned long long expires; /* expiration period */ |
| /* these are for profiling purposes */ |
| unsigned long long buildclk; /* TOD-clock of request generation */ |
| unsigned long long startclk; /* TOD-clock of request start */ |
| unsigned long long stopclk; /* TOD-clock of request interrupt */ |
| unsigned long long endclk; /* TOD-clock of request termination */ |
| |
| /* these are for internal use */ |
| int cplength; /* length of the channel program in CCWs */ |
| int datasize; /* amount of additional data in bytes */ |
| void *lowmem_idal; /* lowmem page for idals (if in use) */ |
| void *lowmem_idal_ptr; /* ptr to the actual idal word in the idals page */ |
| kmem_cache_t *cache; /* the cache this data comes from */ |
| |
| } __attribute__ ((aligned(4))) ccw_req_t; |
| |
| /* |
| * ccw_req_t -> status can be: |
| */ |
| #define CQR_STATUS_EMPTY 0x00 /* cqr is empty */ |
| #define CQR_STATUS_FILLED 0x01 /* cqr is ready to be preocessed */ |
| #define CQR_STATUS_QUEUED 0x02 /* cqr is queued to be processed */ |
| #define CQR_STATUS_IN_IO 0x03 /* cqr is currently in IO */ |
| #define CQR_STATUS_DONE 0x04 /* cqr is completed successfully */ |
| #define CQR_STATUS_ERROR 0x05 /* cqr is completed with error */ |
| #define CQR_STATUS_FAILED 0x06 /* cqr is finally failed */ |
| |
| #define CQR_FLAGS_CHAINED 0x01 /* cqr is chained by another (last CCW is TIC) */ |
| #define CQR_FLAGS_FINALIZED 0x02 |
| #define CQR_FLAGS_LM_CQR 0x04 /* cqr uses page from lowmem_pool */ |
| #define CQR_FLAGS_LM_IDAL 0x08 /* IDALs uses page from lowmem_pool */ |
| |
| #ifdef __KERNEL__ |
| #define SMALLEST_SLAB (sizeof(struct ccw_req_t) <= 128 ? 128 :\ |
| sizeof(struct ccw_req_t) <= 256 ? 256 : 512 ) |
| |
| /* SMALLEST_SLAB(1),... PAGE_SIZE(CCW_NUMBER_CACHES) */ |
| #define CCW_NUMBER_CACHES (sizeof(struct ccw_req_t) <= 128 ? 6 :\ |
| sizeof(struct ccw_req_t) <= 256 ? 5 : 4 ) |
| |
| int ccwcache_init (void); |
| |
| ccw_req_t *ccw_alloc_request (char *magic, int cplength, int additional_data); |
| void ccw_free_request (ccw_req_t * request); |
| #endif /* __KERNEL__ */ |
| #endif /* CCWCACHE_H */ |
| |
| |
| |
