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RDMA/iser: Remove support for FMR memory registration 

FMR is not supported on most recent RDMA devices (that use fast memory
registration mechanism). Also, FMR was recently removed from NFS/RDMA
ULP.

Link: https://lore.kernel.org/r/1-v3-f58e6669d5d3+2cf-fmr_removal_jgg@mellanox.com
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Israel Rukshin 2020-05-28 16:45:43 -03:00 committed by Jason Gunthorpe
parent c7ff819aef
commit 1fc431320a
4 changed files with 40 additions and 372 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

79
drivers/infiniband/ulp/iser/iscsi_iser.h
View File

@ -65,7 +65,6 @@
#include <linux/in6.h>
#include <rdma/ib_verbs.h>
#include <rdma/ib_fmr_pool.h>
#include <rdma/rdma_cm.h>
#define DRV_NAME "iser"
@ -312,33 +311,6 @@ struct iser_comp {
int active_qps;
};
/**
* struct iser_reg_ops - Memory registration operations
* per-device registration schemes
*
* @alloc_reg_res: Allocate registration resources
* @free_reg_res: Free registration resources
* @reg_mem: Register memory buffers
* @unreg_mem: Un-register memory buffers
* @reg_desc_get: Get a registration descriptor for pool
* @reg_desc_put: Get a registration descriptor to pool
*/
struct iser_reg_ops {
int (*alloc_reg_res)(struct ib_conn *ib_conn,
unsigned cmds_max,
unsigned int size);
void (*free_reg_res)(struct ib_conn *ib_conn);
int (*reg_mem)(struct iscsi_iser_task *iser_task,
struct iser_data_buf *mem,
struct iser_reg_resources *rsc,
struct iser_mem_reg *reg);
void (*unreg_mem)(struct iscsi_iser_task *iser_task,
enum iser_data_dir cmd_dir);
struct iser_fr_desc * (*reg_desc_get)(struct ib_conn *ib_conn);
void (*reg_desc_put)(struct ib_conn *ib_conn,
struct iser_fr_desc *desc);
};
/**
* struct iser_device - iSER device handle
*
@ -351,8 +323,6 @@ struct iser_reg_ops {
* @comps_used: Number of completion contexts used, Min between online
* cpus and device max completion vectors
* @comps: Dinamically allocated array of completion handlers
* @reg_ops: Registration ops
* @remote_inv_sup: Remote invalidate is supported on this device
*/
struct iser_device {
struct ib_device *ib_device;
@ -362,26 +332,18 @@ struct iser_device {
int refcount;
int comps_used;
struct iser_comp *comps;
const struct iser_reg_ops *reg_ops;
bool remote_inv_sup;
};
/**
* struct iser_reg_resources - Fast registration resources
*
* @mr: memory region
* @fmr_pool: pool of fmrs
* @sig_mr: signature memory region
* @page_vec: fast reg page list used by fmr pool
* @mr_valid: is mr valid indicator
*/
struct iser_reg_resources {
union {
struct ib_mr *mr;
struct ib_fmr_pool *fmr_pool;
};
struct ib_mr *mr;
struct ib_mr *sig_mr;
struct iser_page_vec *page_vec;
u8 mr_valid:1;
};
@ -403,7 +365,7 @@ struct iser_fr_desc {
* struct iser_fr_pool - connection fast registration pool
*
* @list: list of fastreg descriptors
* @lock: protects fmr/fastreg pool
* @lock: protects fastreg pool
* @size: size of the pool
*/
struct iser_fr_pool {
@ -518,12 +480,6 @@ struct iscsi_iser_task {
struct iser_data_buf prot[ISER_DIRS_NUM];
};
struct iser_page_vec {
u64 *pages;
int npages;
struct ib_mr fake_mr;
};
/**
* struct iser_global - iSER global context
*
@ -548,8 +504,6 @@ extern int iser_pi_guard;
extern unsigned int iser_max_sectors;
extern bool iser_always_reg;
int iser_assign_reg_ops(struct iser_device *device);
int iser_send_control(struct iscsi_conn *conn,
struct iscsi_task *task);
@ -591,22 +545,17 @@ void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_task *iser_task,
struct iser_data_buf *mem,
enum iser_data_dir cmd_dir);
int iser_reg_rdma_mem(struct iscsi_iser_task *task,
enum iser_data_dir dir,
bool all_imm);
void iser_unreg_rdma_mem(struct iscsi_iser_task *task,
enum iser_data_dir dir);
int iser_reg_mem_fastreg(struct iscsi_iser_task *task,
enum iser_data_dir dir,
bool all_imm);
void iser_unreg_mem_fastreg(struct iscsi_iser_task *task,
enum iser_data_dir dir);
int iser_connect(struct iser_conn *iser_conn,
struct sockaddr *src_addr,
struct sockaddr *dst_addr,
int non_blocking);
void iser_unreg_mem_fmr(struct iscsi_iser_task *iser_task,
enum iser_data_dir cmd_dir);
void iser_unreg_mem_fastreg(struct iscsi_iser_task *iser_task,
enum iser_data_dir cmd_dir);
int iser_post_recvl(struct iser_conn *iser_conn);
int iser_post_recvm(struct iser_conn *iser_conn, int count);
int iser_post_send(struct ib_conn *ib_conn, struct iser_tx_desc *tx_desc,
@ -625,26 +574,12 @@ int iser_initialize_task_headers(struct iscsi_task *task,
struct iser_tx_desc *tx_desc);
int iser_alloc_rx_descriptors(struct iser_conn *iser_conn,
struct iscsi_session *session);
int iser_alloc_fmr_pool(struct ib_conn *ib_conn,
unsigned cmds_max,
unsigned int size);
void iser_free_fmr_pool(struct ib_conn *ib_conn);
int iser_alloc_fastreg_pool(struct ib_conn *ib_conn,
unsigned cmds_max,
unsigned int size);
void iser_free_fastreg_pool(struct ib_conn *ib_conn);
u8 iser_check_task_pi_status(struct iscsi_iser_task *iser_task,
enum iser_data_dir cmd_dir, sector_t *sector);
struct iser_fr_desc *
iser_reg_desc_get_fr(struct ib_conn *ib_conn);
void
iser_reg_desc_put_fr(struct ib_conn *ib_conn,
struct iser_fr_desc *desc);
struct iser_fr_desc *
iser_reg_desc_get_fmr(struct ib_conn *ib_conn);
void
iser_reg_desc_put_fmr(struct ib_conn *ib_conn,
struct iser_fr_desc *desc);
static inline struct iser_conn *
to_iser_conn(struct ib_conn *ib_conn)

19
drivers/infiniband/ulp/iser/iser_initiator.c
View File

@ -72,7 +72,7 @@ static int iser_prepare_read_cmd(struct iscsi_task *task)
return err;
}
err = iser_reg_rdma_mem(iser_task, ISER_DIR_IN, false);
err = iser_reg_mem_fastreg(iser_task, ISER_DIR_IN, false);
if (err) {
iser_err("Failed to set up Data-IN RDMA\n");
return err;
@ -126,8 +126,8 @@ iser_prepare_write_cmd(struct iscsi_task *task,
return err;
}
err = iser_reg_rdma_mem(iser_task, ISER_DIR_OUT,
buf_out->data_len == imm_sz);
err = iser_reg_mem_fastreg(iser_task, ISER_DIR_OUT,
buf_out->data_len == imm_sz);
if (err != 0) {
iser_err("Failed to register write cmd RDMA mem\n");
return err;
@ -250,8 +250,8 @@ int iser_alloc_rx_descriptors(struct iser_conn *iser_conn,
iser_conn->qp_max_recv_dtos_mask = session->cmds_max - 1; /* cmds_max is 2^N */
iser_conn->min_posted_rx = iser_conn->qp_max_recv_dtos >> 2;
if (device->reg_ops->alloc_reg_res(ib_conn, session->scsi_cmds_max,
iser_conn->pages_per_mr))
if (iser_alloc_fastreg_pool(ib_conn, session->scsi_cmds_max,
iser_conn->pages_per_mr))
goto create_rdma_reg_res_failed;
if (iser_alloc_login_buf(iser_conn))
@ -293,7 +293,7 @@ int iser_alloc_rx_descriptors(struct iser_conn *iser_conn,
rx_desc_alloc_fail:
iser_free_login_buf(iser_conn);
alloc_login_buf_fail:
device->reg_ops->free_reg_res(ib_conn);
iser_free_fastreg_pool(ib_conn);
create_rdma_reg_res_failed:
iser_err("failed allocating rx descriptors / data buffers\n");
return -ENOMEM;
@ -306,8 +306,7 @@ void iser_free_rx_descriptors(struct iser_conn *iser_conn)
struct ib_conn *ib_conn = &iser_conn->ib_conn;
struct iser_device *device = ib_conn->device;
if (device->reg_ops->free_reg_res)
device->reg_ops->free_reg_res(ib_conn);
iser_free_fastreg_pool(ib_conn);
rx_desc = iser_conn->rx_descs;
for (i = 0; i < iser_conn->qp_max_recv_dtos; i++, rx_desc++)
@ -768,7 +767,7 @@ void iser_task_rdma_finalize(struct iscsi_iser_task *iser_task)
int prot_count = scsi_prot_sg_count(iser_task->sc);
if (iser_task->dir[ISER_DIR_IN]) {
iser_unreg_rdma_mem(iser_task, ISER_DIR_IN);
iser_unreg_mem_fastreg(iser_task, ISER_DIR_IN);
iser_dma_unmap_task_data(iser_task,
&iser_task->data[ISER_DIR_IN],
DMA_FROM_DEVICE);
@ -779,7 +778,7 @@ void iser_task_rdma_finalize(struct iscsi_iser_task *iser_task)
}
if (iser_task->dir[ISER_DIR_OUT]) {
iser_unreg_rdma_mem(iser_task, ISER_DIR_OUT);
iser_unreg_mem_fastreg(iser_task, ISER_DIR_OUT);
iser_dma_unmap_task_data(iser_task,
&iser_task->data[ISER_DIR_OUT],
DMA_TO_DEVICE);

188
drivers/infiniband/ulp/iser/iser_memory.c
View File

@ -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);
}

126
drivers/infiniband/ulp/iser/iser_verbs.c
View File

@ -68,11 +68,12 @@ static void iser_event_handler(struct ib_event_handler *handler,
static int iser_create_device_ib_res(struct iser_device *device)
{
struct ib_device *ib_dev = device->ib_device;
int ret, i, max_cqe;
int i, max_cqe;
ret = iser_assign_reg_ops(device);
if (ret)
return ret;
if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS)) {
iser_err("IB device does not support memory registrations\n");
return -1;
}
device->comps_used = min_t(int, num_online_cpus(),
ib_dev->num_comp_vectors);
@ -147,96 +148,6 @@ static void iser_free_device_ib_res(struct iser_device *device)
device->pd = NULL;
}
/**
* iser_alloc_fmr_pool - Creates FMR pool and page_vector
* @ib_conn: connection RDMA resources
* @cmds_max: max number of SCSI commands for this connection
* @size: max number of pages per map request
*
* Return: 0 on success, or errno code on failure
*/
int iser_alloc_fmr_pool(struct ib_conn *ib_conn,
unsigned cmds_max,
unsigned int size)
{
struct iser_device *device = ib_conn->device;
struct iser_fr_pool *fr_pool = &ib_conn->fr_pool;
struct iser_page_vec *page_vec;
struct iser_fr_desc *desc;
struct ib_fmr_pool *fmr_pool;
struct ib_fmr_pool_param params;
int ret;
INIT_LIST_HEAD(&fr_pool->list);
spin_lock_init(&fr_pool->lock);
desc = kzalloc(sizeof(*desc), GFP_KERNEL);
if (!desc)
return -ENOMEM;
page_vec = kmalloc(sizeof(*page_vec) + (sizeof(u64) * size),
GFP_KERNEL);
if (!page_vec) {
ret = -ENOMEM;
goto err_frpl;
}
page_vec->pages = (u64 *)(page_vec + 1);
params.page_shift = ilog2(SZ_4K);
params.max_pages_per_fmr = size;
/* make the pool size twice the max number of SCSI commands *
* the ML is expected to queue, watermark for unmap at 50% */
params.pool_size = cmds_max * 2;
params.dirty_watermark = cmds_max;
params.cache = 0;
params.flush_function = NULL;
params.access = (IB_ACCESS_LOCAL_WRITE |
IB_ACCESS_REMOTE_WRITE |
IB_ACCESS_REMOTE_READ);
fmr_pool = ib_create_fmr_pool(device->pd, &params);
if (IS_ERR(fmr_pool)) {
ret = PTR_ERR(fmr_pool);
iser_err("FMR allocation failed, err %d\n", ret);
goto err_fmr;
}
desc->rsc.page_vec = page_vec;
desc->rsc.fmr_pool = fmr_pool;
list_add(&desc->list, &fr_pool->list);
return 0;
err_fmr:
kfree(page_vec);
err_frpl:
kfree(desc);
return ret;
}
/**
* iser_free_fmr_pool - releases the FMR pool and page vec
* @ib_conn: connection RDMA resources
*/
void iser_free_fmr_pool(struct ib_conn *ib_conn)
{
struct iser_fr_pool *fr_pool = &ib_conn->fr_pool;
struct iser_fr_desc *desc;
desc = list_first_entry(&fr_pool->list,
struct iser_fr_desc, list);
list_del(&desc->list);
iser_info("freeing conn %p fmr pool %p\n",
ib_conn, desc->rsc.fmr_pool);
ib_destroy_fmr_pool(desc->rsc.fmr_pool);
kfree(desc->rsc.page_vec);
kfree(desc);
}
static struct iser_fr_desc *
iser_create_fastreg_desc(struct iser_device *device,
struct ib_pd *pd,
@ -667,13 +578,12 @@ iser_calc_scsi_params(struct iser_conn *iser_conn,
u32 max_num_sg;
/*
* FRs without SG_GAPS or FMRs can only map up to a (device) page per
* entry, but if the first entry is misaligned we'll end up using two
* entries (head and tail) for a single page worth data, so one
* additional entry is required.
* FRs without SG_GAPS can only map up to a (device) page per entry,
* but if the first entry is misaligned we'll end up using two entries
* (head and tail) for a single page worth data, so one additional
* entry is required.
*/
if ((attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) &&
(attr->device_cap_flags & IB_DEVICE_SG_GAPS_REG))
if (attr->device_cap_flags & IB_DEVICE_SG_GAPS_REG)
reserved_mr_pages = 0;
else
reserved_mr_pages = 1;
@ -684,14 +594,8 @@ iser_calc_scsi_params(struct iser_conn *iser_conn,
max_num_sg = attr->max_fast_reg_page_list_len;
sg_tablesize = DIV_ROUND_UP(max_sectors * SECTOR_SIZE, SZ_4K);
if (attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS)
sup_sg_tablesize =
min_t(
uint, ISCSI_ISER_MAX_SG_TABLESIZE,
max_num_sg - reserved_mr_pages);
else
sup_sg_tablesize = ISCSI_ISER_MAX_SG_TABLESIZE;
sup_sg_tablesize = min_t(uint, ISCSI_ISER_MAX_SG_TABLESIZE,
max_num_sg - reserved_mr_pages);
iser_conn->scsi_sg_tablesize = min(sg_tablesize, sup_sg_tablesize);
iser_conn->pages_per_mr =
iser_conn->scsi_sg_tablesize + reserved_mr_pages;
@ -755,7 +659,7 @@ static void iser_route_handler(struct rdma_cm_id *cma_id)
struct iser_cm_hdr req_hdr;
struct iser_conn *iser_conn = (struct iser_conn *)cma_id->context;
struct ib_conn *ib_conn = &iser_conn->ib_conn;
struct iser_device *device = ib_conn->device;
struct ib_device *ib_dev = ib_conn->device->ib_device;
if (iser_conn->state != ISER_CONN_PENDING)
/* bailout */
@ -766,14 +670,14 @@ static void iser_route_handler(struct rdma_cm_id *cma_id)
goto failure;
memset(&conn_param, 0, sizeof conn_param);
conn_param.responder_resources = device->ib_device->attrs.max_qp_rd_atom;
conn_param.responder_resources = ib_dev->attrs.max_qp_rd_atom;
conn_param.initiator_depth = 1;
conn_param.retry_count = 7;
conn_param.rnr_retry_count = 6;
memset(&req_hdr, 0, sizeof(req_hdr));
req_hdr.flags = ISER_ZBVA_NOT_SUP;
if (!device->remote_inv_sup)
if (!iser_always_reg)
req_hdr.flags |= ISER_SEND_W_INV_NOT_SUP;
conn_param.private_data = (void *)&req_hdr;
conn_param.private_data_len = sizeof(struct iser_cm_hdr);