#include <linux/in6.h>
#include <rdma/ib_verbs.h>
-#include <rdma/ib_fmr_pool.h>
#include <rdma/rdma_cm.h>
#define DRV_NAME "iser"
};
/**
- * 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
*
* @ib_device: RDMA device
* @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;
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;
};
* 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 {
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
*
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);
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,
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)
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;
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;
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))
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;
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++)
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);
}
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);
#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;
return desc;
}
-void
+static void
iser_reg_desc_put_fr(struct ib_conn *ib_conn,
struct iser_fr_desc *desc)
{
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,
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;
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;
}
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;
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;
}
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);
-}
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);
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, ¶ms);
- 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,
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;
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;
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 */
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);
projects / platform / kernel / linux-starfive.git / commitdiff