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smc: remote memory buffers (RMBs)

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* 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>
This commit is contained in:
Ursula Braun
2017-01-09 16:55:18 +01:00
committed by David S. Miller
parent 0cfdd8f92c
commit cd6851f303
7 changed files with 342 additions and 7 deletions
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5
net/smc/smc_ib.h
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@@ -32,9 +32,14 @@ struct smc_ib_device { /* ib-device infos for smc */
u8 initialized : 1; /* ib dev CQ, evthdl done */
};
struct smc_buf_desc;
int smc_ib_register_client(void) __init;
void smc_ib_unregister_client(void);
bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport);
int smc_ib_remember_port_attr(struct smc_ib_device *smcibdev, u8 ibport);
int smc_ib_buf_map(struct smc_ib_device *smcibdev, int buf_size,
struct smc_buf_desc *buf_slot,
enum dma_data_direction data_direction);
#endif