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RDMA/umem: Use simpler logic for ib_umem_find_best_pgsz()

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The calculation in rdma_find_pg_bit() is fairly complicated, and the
function is never called anywhere else. Inline a simpler version into
ib_umem_find_best_pgsz()

Link: https://lore.kernel.org/r/3-v2-270386b7e60b+28f4-umem_1_jgg@nvidia.com
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Jason Gunthorpe
2020-09-04 19:41:44 -03:00
parent 10c75ccb54
commit 3361c29e92
2 changed files with 8 additions and 27 deletions
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24
include/rdma/ib_verbs.h
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@@ -3335,30 +3335,6 @@ static inline bool rdma_cap_read_inv(struct ib_device *dev, u32 port_num)
return rdma_protocol_iwarp(dev, port_num);
}
/**
* rdma_find_pg_bit - Find page bit given address and HW supported page sizes
*
* @addr: address
* @pgsz_bitmap: bitmap of HW supported page sizes
*/
static inline unsigned int rdma_find_pg_bit(unsigned long addr,
unsigned long pgsz_bitmap)
{
unsigned long align;
unsigned long pgsz;
align = addr & -addr;
/* Find page bit such that addr is aligned to the highest supported
* HW page size
*/
pgsz = pgsz_bitmap & ~(-align << 1);
if (!pgsz)
return __ffs(pgsz_bitmap);
return __fls(pgsz);
}
/**
* rdma_core_cap_opa_port - Return whether the RDMA Port is OPA or not.
* @device: Device