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path: root/drivers/infiniband/ulp/iser/iser_memory.c
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Diffstat (limited to 'drivers/infiniband/ulp/iser/iser_memory.c')
-rw-r--r--drivers/infiniband/ulp/iser/iser_memory.c188
1 files changed, 9 insertions, 179 deletions
diff --git a/drivers/infiniband/ulp/iser/iser_memory.c b/drivers/infiniband/ulp/iser/iser_memory.c
index 999ef7cdd05e..d4e057fac219 100644
--- a/drivers/infiniband/ulp/iser/iser_memory.c
+++ b/drivers/infiniband/ulp/iser/iser_memory.c
@@ -38,62 +38,13 @@
#include <linux/scatterlist.h>
#include "iscsi_iser.h"
-static
-int iser_fast_reg_fmr(struct iscsi_iser_task *iser_task,
- struct iser_data_buf *mem,
- struct iser_reg_resources *rsc,
- struct iser_mem_reg *mem_reg);
-static
-int iser_fast_reg_mr(struct iscsi_iser_task *iser_task,
- struct iser_data_buf *mem,
- struct iser_reg_resources *rsc,
- struct iser_mem_reg *mem_reg);
-
-static const struct iser_reg_ops fastreg_ops = {
- .alloc_reg_res = iser_alloc_fastreg_pool,
- .free_reg_res = iser_free_fastreg_pool,
- .reg_mem = iser_fast_reg_mr,
- .unreg_mem = iser_unreg_mem_fastreg,
- .reg_desc_get = iser_reg_desc_get_fr,
- .reg_desc_put = iser_reg_desc_put_fr,
-};
-
-static const struct iser_reg_ops fmr_ops = {
- .alloc_reg_res = iser_alloc_fmr_pool,
- .free_reg_res = iser_free_fmr_pool,
- .reg_mem = iser_fast_reg_fmr,
- .unreg_mem = iser_unreg_mem_fmr,
- .reg_desc_get = iser_reg_desc_get_fmr,
- .reg_desc_put = iser_reg_desc_put_fmr,
-};
void iser_reg_comp(struct ib_cq *cq, struct ib_wc *wc)
{
iser_err_comp(wc, "memreg");
}
-int iser_assign_reg_ops(struct iser_device *device)
-{
- struct ib_device *ib_dev = device->ib_device;
-
- /* Assign function handles - based on FMR support */
- if (ib_dev->ops.alloc_fmr && ib_dev->ops.dealloc_fmr &&
- ib_dev->ops.map_phys_fmr && ib_dev->ops.unmap_fmr) {
- iser_info("FMR supported, using FMR for registration\n");
- device->reg_ops = &fmr_ops;
- } else if (ib_dev->attrs.device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) {
- iser_info("FastReg supported, using FastReg for registration\n");
- device->reg_ops = &fastreg_ops;
- device->remote_inv_sup = iser_always_reg;
- } else {
- iser_err("IB device does not support FMRs nor FastRegs, can't register memory\n");
- return -1;
- }
-
- return 0;
-}
-
-struct iser_fr_desc *
+static struct iser_fr_desc *
iser_reg_desc_get_fr(struct ib_conn *ib_conn)
{
struct iser_fr_pool *fr_pool = &ib_conn->fr_pool;
@@ -109,7 +60,7 @@ iser_reg_desc_get_fr(struct ib_conn *ib_conn)
return desc;
}
-void
+static void
iser_reg_desc_put_fr(struct ib_conn *ib_conn,
struct iser_fr_desc *desc)
{
@@ -121,44 +72,6 @@ iser_reg_desc_put_fr(struct ib_conn *ib_conn,
spin_unlock_irqrestore(&fr_pool->lock, flags);
}
-struct iser_fr_desc *
-iser_reg_desc_get_fmr(struct ib_conn *ib_conn)
-{
- struct iser_fr_pool *fr_pool = &ib_conn->fr_pool;
-
- return list_first_entry(&fr_pool->list,
- struct iser_fr_desc, list);
-}
-
-void
-iser_reg_desc_put_fmr(struct ib_conn *ib_conn,
- struct iser_fr_desc *desc)
-{
-}
-
-static void iser_data_buf_dump(struct iser_data_buf *data,
- struct ib_device *ibdev)
-{
- struct scatterlist *sg;
- int i;
-
- for_each_sg(data->sg, sg, data->dma_nents, i)
- iser_dbg("sg[%d] dma_addr:0x%lX page:0x%p "
- "off:0x%x sz:0x%x dma_len:0x%x\n",
- i, (unsigned long)sg_dma_address(sg),
- sg_page(sg), sg->offset, sg->length, sg_dma_len(sg));
-}
-
-static void iser_dump_page_vec(struct iser_page_vec *page_vec)
-{
- int i;
-
- iser_err("page vec npages %d data length %lld\n",
- page_vec->npages, page_vec->fake_mr.length);
- for (i = 0; i < page_vec->npages; i++)
- iser_err("vec[%d]: %llx\n", i, page_vec->pages[i]);
-}
-
int iser_dma_map_task_data(struct iscsi_iser_task *iser_task,
struct iser_data_buf *data,
enum iser_data_dir iser_dir,
@@ -213,84 +126,9 @@ iser_reg_dma(struct iser_device *device, struct iser_data_buf *mem,
return 0;
}
-static int iser_set_page(struct ib_mr *mr, u64 addr)
-{
- struct iser_page_vec *page_vec =
- container_of(mr, struct iser_page_vec, fake_mr);
-
- page_vec->pages[page_vec->npages++] = addr;
-
- return 0;
-}
-
-static
-int iser_fast_reg_fmr(struct iscsi_iser_task *iser_task,
- struct iser_data_buf *mem,
- struct iser_reg_resources *rsc,
- struct iser_mem_reg *reg)
-{
- struct ib_conn *ib_conn = &iser_task->iser_conn->ib_conn;
- struct iser_device *device = ib_conn->device;
- struct iser_page_vec *page_vec = rsc->page_vec;
- struct ib_fmr_pool *fmr_pool = rsc->fmr_pool;
- struct ib_pool_fmr *fmr;
- int ret, plen;
-
- page_vec->npages = 0;
- page_vec->fake_mr.page_size = SZ_4K;
- plen = ib_sg_to_pages(&page_vec->fake_mr, mem->sg,
- mem->dma_nents, NULL, iser_set_page);
- if (unlikely(plen < mem->dma_nents)) {
- iser_err("page vec too short to hold this SG\n");
- iser_data_buf_dump(mem, device->ib_device);
- iser_dump_page_vec(page_vec);
- return -EINVAL;
- }
-
- fmr = ib_fmr_pool_map_phys(fmr_pool, page_vec->pages,
- page_vec->npages, page_vec->pages[0]);
- if (IS_ERR(fmr)) {
- ret = PTR_ERR(fmr);
- iser_err("ib_fmr_pool_map_phys failed: %d\n", ret);
- return ret;
- }
-
- reg->sge.lkey = fmr->fmr->lkey;
- reg->rkey = fmr->fmr->rkey;
- reg->sge.addr = page_vec->fake_mr.iova;
- reg->sge.length = page_vec->fake_mr.length;
- reg->mem_h = fmr;
-
- iser_dbg("fmr reg: lkey=0x%x, rkey=0x%x, addr=0x%llx,"
- " length=0x%x\n", reg->sge.lkey, reg->rkey,
- reg->sge.addr, reg->sge.length);
-
- return 0;
-}
-
-/**
- * Unregister (previosuly registered using FMR) memory.
- * If memory is non-FMR does nothing.
- */
-void iser_unreg_mem_fmr(struct iscsi_iser_task *iser_task,
- enum iser_data_dir cmd_dir)
-{
- struct iser_mem_reg *reg = &iser_task->rdma_reg[cmd_dir];
-
- if (!reg->mem_h)
- return;
-
- iser_dbg("PHYSICAL Mem.Unregister mem_h %p\n", reg->mem_h);
-
- ib_fmr_pool_unmap((struct ib_pool_fmr *)reg->mem_h);
-
- reg->mem_h = NULL;
-}
-
void iser_unreg_mem_fastreg(struct iscsi_iser_task *iser_task,
enum iser_data_dir cmd_dir)
{
- struct iser_device *device = iser_task->iser_conn->ib_conn.device;
struct iser_mem_reg *reg = &iser_task->rdma_reg[cmd_dir];
struct iser_fr_desc *desc;
struct ib_mr_status mr_status;
@@ -312,7 +150,7 @@ void iser_unreg_mem_fastreg(struct iscsi_iser_task *iser_task,
ib_check_mr_status(desc->rsc.sig_mr, IB_MR_CHECK_SIG_STATUS,
&mr_status);
}
- device->reg_ops->reg_desc_put(&iser_task->iser_conn->ib_conn, desc);
+ iser_reg_desc_put_fr(&iser_task->iser_conn->ib_conn, reg->mem_h);
reg->mem_h = NULL;
}
@@ -509,15 +347,14 @@ iser_reg_data_sg(struct iscsi_iser_task *task,
if (use_dma_key)
return iser_reg_dma(device, mem, reg);
- return device->reg_ops->reg_mem(task, mem, &desc->rsc, reg);
+ return iser_fast_reg_mr(task, mem, &desc->rsc, reg);
}
-int iser_reg_rdma_mem(struct iscsi_iser_task *task,
- enum iser_data_dir dir,
- bool all_imm)
+int iser_reg_mem_fastreg(struct iscsi_iser_task *task,
+ enum iser_data_dir dir,
+ bool all_imm)
{
struct ib_conn *ib_conn = &task->iser_conn->ib_conn;
- struct iser_device *device = ib_conn->device;
struct iser_data_buf *mem = &task->data[dir];
struct iser_mem_reg *reg = &task->rdma_reg[dir];
struct iser_fr_desc *desc = NULL;
@@ -528,7 +365,7 @@ int iser_reg_rdma_mem(struct iscsi_iser_task *task,
scsi_get_prot_op(task->sc) == SCSI_PROT_NORMAL;
if (!use_dma_key) {
- desc = device->reg_ops->reg_desc_get(ib_conn);
+ desc = iser_reg_desc_get_fr(ib_conn);
reg->mem_h = desc;
}
@@ -549,15 +386,8 @@ int iser_reg_rdma_mem(struct iscsi_iser_task *task,
err_reg:
if (desc)
- device->reg_ops->reg_desc_put(ib_conn, desc);
+ iser_reg_desc_put_fr(ib_conn, desc);
return err;
}
-void iser_unreg_rdma_mem(struct iscsi_iser_task *task,
- enum iser_data_dir dir)
-{
- struct iser_device *device = task->iser_conn->ib_conn.device;
-
- device->reg_ops->unreg_mem(task, dir);
-}