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author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-03-27 11:32:29 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-03-27 11:32:29 -0300 |
commit | 50953e0640b3473dcb409d5d0d938c2742c93b0d (patch) | |
tree | 3b0dc374e61564fbbd8adff92c8fae16fdeb423a /drivers/staging/ramster/ramster.h | |
parent | f92c97c8bd77992ff8bd6ef29a23dc82dca799cb (diff) | |
parent | 626cf236608505d376e4799adb4f7eb00a8594af (diff) | |
download | op-kernel-dev-50953e0640b3473dcb409d5d0d938c2742c93b0d.zip op-kernel-dev-50953e0640b3473dcb409d5d0d938c2742c93b0d.tar.gz |
Merge branch 'poll' into staging/for_v3.4
* poll: (5970 commits)
poll: add poll_requested_events() and poll_does_not_wait() functions
crc32: select an algorithm via Kconfig
crc32: add self-test code for crc32c
crypto: crc32c should use library implementation
crc32: bolt on crc32c
crc32: add note about this patchset to crc32.c
crc32: optimize loop counter for x86
crc32: add slice-by-8 algorithm to existing code
crc32: make CRC_*_BITS definition correspond to actual bit counts
crc32: fix mixing of endian-specific types
crc32: miscellaneous cleanups
crc32: simplify unit test code
crc32: move long comment about crc32 fundamentals to Documentation/
crc32: remove two instances of trailing whitespaces
checkpatch: check for quoted strings broken across lines
checkpatch: whitespace - add/remove blank lines
checkpatch: warn on use of yield()
checkpatch: add --strict tests for braces, comments and casts
checkpatch: add [] to type extensions
checkpatch: high precedence operators do not require additional parentheses in #defines
...
Diffstat (limited to 'drivers/staging/ramster/ramster.h')
-rw-r--r-- | drivers/staging/ramster/ramster.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/drivers/staging/ramster/ramster.h b/drivers/staging/ramster/ramster.h new file mode 100644 index 0000000..0c9455e --- /dev/null +++ b/drivers/staging/ramster/ramster.h @@ -0,0 +1,118 @@ +/* + * ramster.h + * + * Peer-to-peer transcendent memory + * + * Copyright (c) 2009-2012, Dan Magenheimer, Oracle Corp. + */ + +#ifndef _RAMSTER_H_ +#define _RAMSTER_H_ + +/* + * format of remote pampd: + * bit 0 == intransit + * bit 1 == is_remote... if this bit is set, then + * bit 2-9 == remotenode + * bit 10-22 == size + * bit 23-30 == cksum + */ +#define FAKE_PAMPD_INTRANSIT_BITS 1 +#define FAKE_PAMPD_ISREMOTE_BITS 1 +#define FAKE_PAMPD_REMOTENODE_BITS 8 +#define FAKE_PAMPD_REMOTESIZE_BITS 13 +#define FAKE_PAMPD_CHECKSUM_BITS 8 + +#define FAKE_PAMPD_INTRANSIT_SHIFT 0 +#define FAKE_PAMPD_ISREMOTE_SHIFT (FAKE_PAMPD_INTRANSIT_SHIFT + \ + FAKE_PAMPD_INTRANSIT_BITS) +#define FAKE_PAMPD_REMOTENODE_SHIFT (FAKE_PAMPD_ISREMOTE_SHIFT + \ + FAKE_PAMPD_ISREMOTE_BITS) +#define FAKE_PAMPD_REMOTESIZE_SHIFT (FAKE_PAMPD_REMOTENODE_SHIFT + \ + FAKE_PAMPD_REMOTENODE_BITS) +#define FAKE_PAMPD_CHECKSUM_SHIFT (FAKE_PAMPD_REMOTESIZE_SHIFT + \ + FAKE_PAMPD_REMOTESIZE_BITS) + +#define FAKE_PAMPD_MASK(x) ((1UL << (x)) - 1) + +static inline void *pampd_make_remote(int remotenode, size_t size, + unsigned char cksum) +{ + unsigned long fake_pampd = 0; + fake_pampd |= 1UL << FAKE_PAMPD_ISREMOTE_SHIFT; + fake_pampd |= ((unsigned long)remotenode & + FAKE_PAMPD_MASK(FAKE_PAMPD_REMOTENODE_BITS)) << + FAKE_PAMPD_REMOTENODE_SHIFT; + fake_pampd |= ((unsigned long)size & + FAKE_PAMPD_MASK(FAKE_PAMPD_REMOTESIZE_BITS)) << + FAKE_PAMPD_REMOTESIZE_SHIFT; + fake_pampd |= ((unsigned long)cksum & + FAKE_PAMPD_MASK(FAKE_PAMPD_CHECKSUM_BITS)) << + FAKE_PAMPD_CHECKSUM_SHIFT; + return (void *)fake_pampd; +} + +static inline unsigned int pampd_remote_node(void *pampd) +{ + unsigned long fake_pampd = (unsigned long)pampd; + return (fake_pampd >> FAKE_PAMPD_REMOTENODE_SHIFT) & + FAKE_PAMPD_MASK(FAKE_PAMPD_REMOTENODE_BITS); +} + +static inline unsigned int pampd_remote_size(void *pampd) +{ + unsigned long fake_pampd = (unsigned long)pampd; + return (fake_pampd >> FAKE_PAMPD_REMOTESIZE_SHIFT) & + FAKE_PAMPD_MASK(FAKE_PAMPD_REMOTESIZE_BITS); +} + +static inline unsigned char pampd_remote_cksum(void *pampd) +{ + unsigned long fake_pampd = (unsigned long)pampd; + return (fake_pampd >> FAKE_PAMPD_CHECKSUM_SHIFT) & + FAKE_PAMPD_MASK(FAKE_PAMPD_CHECKSUM_BITS); +} + +static inline bool pampd_is_remote(void *pampd) +{ + unsigned long fake_pampd = (unsigned long)pampd; + return (fake_pampd >> FAKE_PAMPD_ISREMOTE_SHIFT) & + FAKE_PAMPD_MASK(FAKE_PAMPD_ISREMOTE_BITS); +} + +static inline bool pampd_is_intransit(void *pampd) +{ + unsigned long fake_pampd = (unsigned long)pampd; + return (fake_pampd >> FAKE_PAMPD_INTRANSIT_SHIFT) & + FAKE_PAMPD_MASK(FAKE_PAMPD_INTRANSIT_BITS); +} + +/* note that it is a BUG for intransit to be set without isremote also set */ +static inline void *pampd_mark_intransit(void *pampd) +{ + unsigned long fake_pampd = (unsigned long)pampd; + + fake_pampd |= 1UL << FAKE_PAMPD_ISREMOTE_SHIFT; + fake_pampd |= 1UL << FAKE_PAMPD_INTRANSIT_SHIFT; + return (void *)fake_pampd; +} + +static inline void *pampd_mask_intransit_and_remote(void *marked_pampd) +{ + unsigned long pampd = (unsigned long)marked_pampd; + + pampd &= ~(1UL << FAKE_PAMPD_INTRANSIT_SHIFT); + pampd &= ~(1UL << FAKE_PAMPD_ISREMOTE_SHIFT); + return (void *)pampd; +} + +extern int ramster_remote_async_get(struct tmem_xhandle *, + bool, int, size_t, uint8_t, void *extra); +extern int ramster_remote_put(struct tmem_xhandle *, char *, size_t, + bool, int *); +extern int ramster_remote_flush(struct tmem_xhandle *, int); +extern int ramster_remote_flush_object(struct tmem_xhandle *, int); +extern int r2net_register_handlers(void); +extern int r2net_remote_target_node_set(int); + +#endif /* _TMEM_H */ |