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RDS/IW: Remove page_shift variable from iwarp transport 

The existing code treated page_shift as a variable, when in fact we
always want to have the fastreg page size be the same as the arch's
page size -- and it is, so this doesn't need to be a variable.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andy Grover 2009-07-17 13:13:34 +00:00 committed by David S. Miller
parent a870d62726
commit 404bb72a56
4 changed files with 11 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
net/rds/iw.c
View File

@ -83,8 +83,6 @@ void rds_iw_add_one(struct ib_device *device)
rds_iwdev->max_wrs = dev_attr->max_qp_wr;
rds_iwdev->max_sge = min(dev_attr->max_sge, RDS_IW_MAX_SGE);
rds_iwdev->page_shift = max(PAGE_SHIFT, ffs(dev_attr->page_size_cap) - 1);
rds_iwdev->dev = device;
rds_iwdev->pd = ib_alloc_pd(device);
if (IS_ERR(rds_iwdev->pd))

1
net/rds/iw.h
View File

@ -181,7 +181,6 @@ struct rds_iw_device {
struct ib_pd *pd;
struct ib_mr *mr;
struct rds_iw_mr_pool *mr_pool;
int page_shift;
int max_sge;
unsigned int max_wrs;
unsigned int dma_local_lkey:1;

28
net/rds/iw_rdma.c
View File

@ -263,18 +263,12 @@ static void rds_iw_set_scatterlist(struct rds_iw_scatterlist *sg,
}
static u64 *rds_iw_map_scatterlist(struct rds_iw_device *rds_iwdev,
struct rds_iw_scatterlist *sg,
unsigned int dma_page_shift)
struct rds_iw_scatterlist *sg)
{
struct ib_device *dev = rds_iwdev->dev;
u64 *dma_pages = NULL;
u64 dma_mask;
unsigned int dma_page_size;
int i, j, ret;
dma_page_size = 1 << dma_page_shift;
dma_mask = dma_page_size - 1;
WARN_ON(sg->dma_len);
sg->dma_len = ib_dma_map_sg(dev, sg->list, sg->len, DMA_BIDIRECTIONAL);
@ -295,18 +289,18 @@ static u64 *rds_iw_map_scatterlist(struct rds_iw_device *rds_iwdev,
sg->bytes += dma_len;
end_addr = dma_addr + dma_len;
if (dma_addr & dma_mask) {
if (dma_addr & PAGE_MASK) {
if (i > 0)
goto out_unmap;
dma_addr &= ~dma_mask;
dma_addr &= ~PAGE_MASK;
}
if (end_addr & dma_mask) {
if (end_addr & PAGE_MASK) {
if (i < sg->dma_len - 1)
goto out_unmap;
end_addr = (end_addr + dma_mask) & ~dma_mask;
end_addr = (end_addr + PAGE_MASK) & ~PAGE_MASK;
}
sg->dma_npages += (end_addr - dma_addr) >> dma_page_shift;
sg->dma_npages += (end_addr - dma_addr) >> PAGE_SHIFT;
}
/* Now gather the dma addrs into one list */
@ -325,8 +319,8 @@ static u64 *rds_iw_map_scatterlist(struct rds_iw_device *rds_iwdev,
u64 end_addr;
end_addr = dma_addr + dma_len;
dma_addr &= ~dma_mask;
for (; dma_addr < end_addr; dma_addr += dma_page_size)
dma_addr &= ~PAGE_MASK;
for (; dma_addr < end_addr; dma_addr += PAGE_SIZE)
dma_pages[j++] = dma_addr;
BUG_ON(j > sg->dma_npages);
}
@ -727,7 +721,7 @@ static int rds_iw_rdma_build_fastreg(struct rds_iw_mapping *mapping)
f_wr.wr.fast_reg.rkey = mapping->m_rkey;
f_wr.wr.fast_reg.page_list = ibmr->page_list;
f_wr.wr.fast_reg.page_list_len = mapping->m_sg.dma_len;
f_wr.wr.fast_reg.page_shift = ibmr->device->page_shift;
f_wr.wr.fast_reg.page_shift = PAGE_SHIFT;
f_wr.wr.fast_reg.access_flags = IB_ACCESS_LOCAL_WRITE |
IB_ACCESS_REMOTE_READ |
IB_ACCESS_REMOTE_WRITE;
@ -780,9 +774,7 @@ static int rds_iw_map_fastreg(struct rds_iw_mr_pool *pool,
rds_iw_set_scatterlist(&mapping->m_sg, sg, sg_len);
dma_pages = rds_iw_map_scatterlist(rds_iwdev,
&mapping->m_sg,
rds_iwdev->page_shift);
dma_pages = rds_iw_map_scatterlist(rds_iwdev, &mapping->m_sg);
if (IS_ERR(dma_pages)) {
ret = PTR_ERR(dma_pages);
dma_pages = NULL;

2
net/rds/iw_send.c
View File

@ -779,7 +779,7 @@ static void rds_iw_build_send_fastreg(struct rds_iw_device *rds_iwdev, struct rd
send->s_wr.wr.fast_reg.rkey = send->s_mr->rkey;
send->s_wr.wr.fast_reg.page_list = send->s_page_list;
send->s_wr.wr.fast_reg.page_list_len = nent;
send->s_wr.wr.fast_reg.page_shift = rds_iwdev->page_shift;
send->s_wr.wr.fast_reg.page_shift = PAGE_SHIFT;
send->s_wr.wr.fast_reg.access_flags = IB_ACCESS_REMOTE_WRITE;
send->s_wr.wr.fast_reg.iova_start = sg_addr;