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| author | Ursula Braun <ubraun@linux.vnet.ibm.com> | 2017-01-09 16:55:18 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-01-09 16:07:39 -0500 |
| commit | cd6851f30386e5e04b5c2253f8e1647ba0ebcd31 (patch) | |
| tree | 9aadc7a36c03303408ebe4d24011be3fcc9b9b6e /net/smc/smc_core.h | |
| parent | 0cfdd8f92cac01afbb12e4500514036a2b78756b (diff) | |
| download | linux-cd6851f30386e5e04b5c2253f8e1647ba0ebcd31.tar.gz | |
smc: remote memory buffers (RMBs)
* allocate data RMB memory for sending and receiving * size depends on the maximum socket send and receive buffers * allocated RMBs are kept during life time of the owning link group * map the allocated RMBs to DMA Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/smc/smc_core.h')
| -rw-r--r-- | net/smc/smc_core.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h index 14b787abae02..bf0026db44e9 100644 --- a/net/smc/smc_core.h +++ b/net/smc/smc_core.h @@ -16,6 +16,8 @@ #include "smc.h" #include "smc_ib.h" +#define SMC_RMBS_PER_LGR_MAX 255 /* max. # of RMBs per link group */ + struct smc_lgr_list { /* list of link group definition */ struct list_head list; spinlock_t lock; /* protects list of link groups */ @@ -52,6 +54,15 @@ struct smc_link { #define SMC_FIRST_CONTACT 1 /* first contact to a peer */ #define SMC_REUSE_CONTACT 0 /* follow-on contact to a peer*/ +/* tx/rx buffer list element for sndbufs list and rmbs list of a lgr */ +struct smc_buf_desc { + struct list_head list; + u64 dma_addr[SMC_LINKS_PER_LGR_MAX]; + /* mapped address of buffer */ + void *cpu_addr; /* virtual address of buffer */ + u32 used; /* currently used / unused */ +}; + struct smc_link_group { struct list_head list; enum smc_lgr_role role; /* client or server */ @@ -63,6 +74,11 @@ struct smc_link_group { rwlock_t conns_lock; /* protects conns_all */ unsigned int conns_num; /* current # of connections */ unsigned short vlan_id; /* vlan id of link group */ + + struct list_head sndbufs[SMC_RMBE_SIZES];/* tx buffers */ + rwlock_t sndbufs_lock; /* protects tx buffers */ + struct list_head rmbs[SMC_RMBE_SIZES]; /* rx buffers */ + rwlock_t rmbs_lock; /* protects rx buffers */ struct delayed_work free_work; /* delayed freeing of an lgr */ bool sync_err; /* lgr no longer fits to peer */ }; @@ -100,7 +116,12 @@ static inline struct smc_connection *smc_lgr_find_conn( return res; } +struct smc_sock; +struct smc_clc_msg_accept_confirm; + void smc_lgr_free(struct smc_link_group *lgr); void smc_lgr_terminate(struct smc_link_group *lgr); +int smc_sndbuf_create(struct smc_sock *smc); +int smc_rmb_create(struct smc_sock *smc); #endif |