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Diffstat (limited to 'net/rds/iw_rdma.c')
-rw-r--r--net/rds/iw_rdma.c129
1 files changed, 46 insertions, 83 deletions
diff --git a/net/rds/iw_rdma.c b/net/rds/iw_rdma.c
index d3d4454ffc84..b09a40c1adce 100644
--- a/net/rds/iw_rdma.c
+++ b/net/rds/iw_rdma.c
@@ -47,7 +47,6 @@ struct rds_iw_mr {
struct rdma_cm_id *cm_id;
struct ib_mr *mr;
- struct ib_fast_reg_page_list *page_list;
struct rds_iw_mapping mapping;
unsigned char remap_count;
@@ -77,8 +76,8 @@ struct rds_iw_mr_pool {
static void rds_iw_flush_mr_pool(struct rds_iw_mr_pool *pool, int free_all);
static void rds_iw_mr_pool_flush_worker(struct work_struct *work);
-static int rds_iw_init_fastreg(struct rds_iw_mr_pool *pool, struct rds_iw_mr *ibmr);
-static int rds_iw_map_fastreg(struct rds_iw_mr_pool *pool,
+static int rds_iw_init_reg(struct rds_iw_mr_pool *pool, struct rds_iw_mr *ibmr);
+static int rds_iw_map_reg(struct rds_iw_mr_pool *pool,
struct rds_iw_mr *ibmr,
struct scatterlist *sg, unsigned int nents);
static void rds_iw_free_fastreg(struct rds_iw_mr_pool *pool, struct rds_iw_mr *ibmr);
@@ -258,19 +257,18 @@ static void rds_iw_set_scatterlist(struct rds_iw_scatterlist *sg,
sg->bytes = 0;
}
-static u64 *rds_iw_map_scatterlist(struct rds_iw_device *rds_iwdev,
- struct rds_iw_scatterlist *sg)
+static int rds_iw_map_scatterlist(struct rds_iw_device *rds_iwdev,
+ struct rds_iw_scatterlist *sg)
{
struct ib_device *dev = rds_iwdev->dev;
- u64 *dma_pages = NULL;
- int i, j, ret;
+ int i, ret;
WARN_ON(sg->dma_len);
sg->dma_len = ib_dma_map_sg(dev, sg->list, sg->len, DMA_BIDIRECTIONAL);
if (unlikely(!sg->dma_len)) {
printk(KERN_WARNING "RDS/IW: dma_map_sg failed!\n");
- return ERR_PTR(-EBUSY);
+ return -EBUSY;
}
sg->bytes = 0;
@@ -303,31 +301,14 @@ static u64 *rds_iw_map_scatterlist(struct rds_iw_device *rds_iwdev,
if (sg->dma_npages > fastreg_message_size)
goto out_unmap;
- dma_pages = kmalloc(sizeof(u64) * sg->dma_npages, GFP_ATOMIC);
- if (!dma_pages) {
- ret = -ENOMEM;
- goto out_unmap;
- }
- for (i = j = 0; i < sg->dma_len; ++i) {
- unsigned int dma_len = ib_sg_dma_len(dev, &sg->list[i]);
- u64 dma_addr = ib_sg_dma_address(dev, &sg->list[i]);
- u64 end_addr;
- end_addr = dma_addr + dma_len;
- dma_addr &= ~PAGE_MASK;
- for (; dma_addr < end_addr; dma_addr += PAGE_SIZE)
- dma_pages[j++] = dma_addr;
- BUG_ON(j > sg->dma_npages);
- }
-
- return dma_pages;
+ return 0;
out_unmap:
ib_dma_unmap_sg(rds_iwdev->dev, sg->list, sg->len, DMA_BIDIRECTIONAL);
sg->dma_len = 0;
- kfree(dma_pages);
- return ERR_PTR(ret);
+ return ret;
}
@@ -440,7 +421,7 @@ static struct rds_iw_mr *rds_iw_alloc_mr(struct rds_iw_device *rds_iwdev)
INIT_LIST_HEAD(&ibmr->mapping.m_list);
ibmr->mapping.m_mr = ibmr;
- err = rds_iw_init_fastreg(pool, ibmr);
+ err = rds_iw_init_reg(pool, ibmr);
if (err)
goto out_no_cigar;
@@ -620,7 +601,7 @@ void *rds_iw_get_mr(struct scatterlist *sg, unsigned long nents,
ibmr->cm_id = cm_id;
ibmr->device = rds_iwdev;
- ret = rds_iw_map_fastreg(rds_iwdev->mr_pool, ibmr, sg, nents);
+ ret = rds_iw_map_reg(rds_iwdev->mr_pool, ibmr, sg, nents);
if (ret == 0)
*key_ret = ibmr->mr->rkey;
else
@@ -636,7 +617,7 @@ out:
}
/*
- * iWARP fastreg handling
+ * iWARP reg handling
*
* The life cycle of a fastreg registration is a bit different from
* FMRs.
@@ -648,7 +629,7 @@ out:
* This creates a bit of a problem for us, as we do not have the destination
* IP in GET_MR, so the connection must be setup prior to the GET_MR call for
* RDMA to be correctly setup. If a fastreg request is present, rds_iw_xmit
- * will try to queue a LOCAL_INV (if needed) and a FAST_REG_MR work request
+ * will try to queue a LOCAL_INV (if needed) and a REG_MR work request
* before queuing the SEND. When completions for these arrive, they are
* dispatched to the MR has a bit set showing that RDMa can be performed.
*
@@ -657,11 +638,10 @@ out:
* The expectation there is that this invalidation step includes ALL
* PREVIOUSLY FREED MRs.
*/
-static int rds_iw_init_fastreg(struct rds_iw_mr_pool *pool,
- struct rds_iw_mr *ibmr)
+static int rds_iw_init_reg(struct rds_iw_mr_pool *pool,
+ struct rds_iw_mr *ibmr)
{
struct rds_iw_device *rds_iwdev = pool->device;
- struct ib_fast_reg_page_list *page_list = NULL;
struct ib_mr *mr;
int err;
@@ -674,55 +654,44 @@ static int rds_iw_init_fastreg(struct rds_iw_mr_pool *pool,
return err;
}
- /* FIXME - this is overkill, but mapping->m_sg.dma_len/mapping->m_sg.dma_npages
- * is not filled in.
- */
- page_list = ib_alloc_fast_reg_page_list(rds_iwdev->dev, pool->max_message_size);
- if (IS_ERR(page_list)) {
- err = PTR_ERR(page_list);
-
- printk(KERN_WARNING "RDS/IW: ib_alloc_fast_reg_page_list failed (err=%d)\n", err);
- ib_dereg_mr(mr);
- return err;
- }
-
- ibmr->page_list = page_list;
ibmr->mr = mr;
return 0;
}
-static int rds_iw_rdma_build_fastreg(struct rds_iw_mapping *mapping)
+static int rds_iw_rdma_reg_mr(struct rds_iw_mapping *mapping)
{
struct rds_iw_mr *ibmr = mapping->m_mr;
- struct ib_send_wr f_wr, *failed_wr;
- int ret;
+ struct rds_iw_scatterlist *m_sg = &mapping->m_sg;
+ struct ib_reg_wr reg_wr;
+ struct ib_send_wr *failed_wr;
+ int ret, n;
+
+ n = ib_map_mr_sg_zbva(ibmr->mr, m_sg->list, m_sg->len, PAGE_SIZE);
+ if (unlikely(n != m_sg->len))
+ return n < 0 ? n : -EINVAL;
+
+ reg_wr.wr.next = NULL;
+ reg_wr.wr.opcode = IB_WR_REG_MR;
+ reg_wr.wr.wr_id = RDS_IW_REG_WR_ID;
+ reg_wr.wr.num_sge = 0;
+ reg_wr.mr = ibmr->mr;
+ reg_wr.key = mapping->m_rkey;
+ reg_wr.access = IB_ACCESS_LOCAL_WRITE |
+ IB_ACCESS_REMOTE_READ |
+ IB_ACCESS_REMOTE_WRITE;
/*
- * Perform a WR for the fast_reg_mr. Each individual page
+ * Perform a WR for the reg_mr. Each individual page
* in the sg list is added to the fast reg page list and placed
- * inside the fast_reg_mr WR. The key used is a rolling 8bit
+ * inside the reg_mr WR. The key used is a rolling 8bit
* counter, which should guarantee uniqueness.
*/
ib_update_fast_reg_key(ibmr->mr, ibmr->remap_count++);
mapping->m_rkey = ibmr->mr->rkey;
- memset(&f_wr, 0, sizeof(f_wr));
- f_wr.wr_id = RDS_IW_FAST_REG_WR_ID;
- f_wr.opcode = IB_WR_FAST_REG_MR;
- f_wr.wr.fast_reg.length = mapping->m_sg.bytes;
- 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 = PAGE_SHIFT;
- f_wr.wr.fast_reg.access_flags = IB_ACCESS_LOCAL_WRITE |
- IB_ACCESS_REMOTE_READ |
- IB_ACCESS_REMOTE_WRITE;
- f_wr.wr.fast_reg.iova_start = 0;
- f_wr.send_flags = IB_SEND_SIGNALED;
-
- failed_wr = &f_wr;
- ret = ib_post_send(ibmr->cm_id->qp, &f_wr, &failed_wr);
- BUG_ON(failed_wr != &f_wr);
+ failed_wr = &reg_wr.wr;
+ ret = ib_post_send(ibmr->cm_id->qp, &reg_wr.wr, &failed_wr);
+ BUG_ON(failed_wr != &reg_wr.wr);
if (ret)
printk_ratelimited(KERN_WARNING "RDS/IW: %s:%d ib_post_send returned %d\n",
__func__, __LINE__, ret);
@@ -754,21 +723,20 @@ out:
return ret;
}
-static int rds_iw_map_fastreg(struct rds_iw_mr_pool *pool,
- struct rds_iw_mr *ibmr,
- struct scatterlist *sg,
- unsigned int sg_len)
+static int rds_iw_map_reg(struct rds_iw_mr_pool *pool,
+ struct rds_iw_mr *ibmr,
+ struct scatterlist *sg,
+ unsigned int sg_len)
{
struct rds_iw_device *rds_iwdev = pool->device;
struct rds_iw_mapping *mapping = &ibmr->mapping;
u64 *dma_pages;
- int i, ret = 0;
+ int ret = 0;
rds_iw_set_scatterlist(&mapping->m_sg, sg, sg_len);
- dma_pages = rds_iw_map_scatterlist(rds_iwdev, &mapping->m_sg);
- if (IS_ERR(dma_pages)) {
- ret = PTR_ERR(dma_pages);
+ ret = rds_iw_map_scatterlist(rds_iwdev, &mapping->m_sg);
+ if (ret) {
dma_pages = NULL;
goto out;
}
@@ -778,10 +746,7 @@ static int rds_iw_map_fastreg(struct rds_iw_mr_pool *pool,
goto out;
}
- for (i = 0; i < mapping->m_sg.dma_npages; ++i)
- ibmr->page_list->page_list[i] = dma_pages[i];
-
- ret = rds_iw_rdma_build_fastreg(mapping);
+ ret = rds_iw_rdma_reg_mr(mapping);
if (ret)
goto out;
@@ -867,8 +832,6 @@ static unsigned int rds_iw_unmap_fastreg_list(struct rds_iw_mr_pool *pool,
static void rds_iw_destroy_fastreg(struct rds_iw_mr_pool *pool,
struct rds_iw_mr *ibmr)
{
- if (ibmr->page_list)
- ib_free_fast_reg_page_list(ibmr->page_list);
if (ibmr->mr)
ib_dereg_mr(ibmr->mr);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 23:02:26 +0000