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RDMA/Core: remove rdma_cap_read_multi_sge() helper

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This functionality already exists via the max_sge_rd
device capability.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Steve Wise 2015-07-27 18:10:18 -05:00 • committed by Doug Ledford
parent bc3fe2e376
commit 3403051ebb
1 changed files with 0 additions and 28 deletions
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28
include/rdma/ib_verbs.h
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@ -2070,34 +2070,6 @@ static inline bool rdma_cap_eth_ah(const struct ib_device *device, u8 port_num)
return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_ETH_AH; return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_ETH_AH;
} }
/**
* rdma_cap_read_multi_sge - Check if the port of device has the capability
* RDMA Read Multiple Scatter-Gather Entries.
* @device: Device to check
* @port_num: Port number to check
*
* iWARP has a restriction that RDMA READ requests may only have a single
* Scatter/Gather Entry (SGE) in the work request.
*
* NOTE: although the linux kernel currently assumes all devices are either
* single SGE RDMA READ devices or identical SGE maximums for RDMA READs and
* WRITEs, according to Tom Talpey, this is not accurate. There are some
* devices out there that support more than a single SGE on RDMA READ
* requests, but do not support the same number of SGEs as they do on
* RDMA WRITE requests. The linux kernel would need rearchitecting to
* support these imbalanced READ/WRITE SGEs allowed devices. So, for now,
* suffice with either the device supports the same READ/WRITE SGEs, or
* it only gets one READ sge.
*
* Return: true for any device that allows more than one SGE in RDMA READ
* requests.
*/
static inline bool rdma_cap_read_multi_sge(struct ib_device *device,
u8 port_num)
{
return !(device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_IWARP);
}
/** /**
* rdma_max_mad_size - Return the max MAD size required by this RDMA Port. * rdma_max_mad_size - Return the max MAD size required by this RDMA Port.
* *