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RDMA/ocrdma: Add support for fast register work requests (FRWR) 

Also get the max_srq value from query_config mailbox response.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Naresh Gottumukkala 2013-08-26 15:27:39 +05:30 committed by Roland Dreier
parent 43a6b4025c
commit 7c33880c3c
6 changed files with 192 additions and 3 deletions
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2
drivers/infiniband/hw/ocrdma/ocrdma.h
View File

@ -56,6 +56,7 @@ struct ocrdma_dev_attr {
u16 max_qp;
u16 max_wqe;
u16 max_rqe;
u16 max_srq;
u32 max_inline_data;
int max_send_sge;
int max_recv_sge;
@ -169,6 +170,7 @@ struct ocrdma_dev {
struct list_head entry;
struct rcu_head rcu;
int id;
u64 stag_arr[OCRDMA_MAX_STAG];
};
struct ocrdma_cq {

3
drivers/infiniband/hw/ocrdma/ocrdma_hw.c
View File

@ -999,6 +999,9 @@ static void ocrdma_get_attr(struct ocrdma_dev *dev,
attr->max_ord_per_qp = (rsp->max_ird_ord_per_qp &
OCRDMA_MBX_QUERY_CFG_MAX_ORD_PER_QP_MASK) >>
OCRDMA_MBX_QUERY_CFG_MAX_ORD_PER_QP_SHIFT;
attr->max_srq =
(rsp->max_srq_rpir_qps & OCRDMA_MBX_QUERY_CFG_MAX_SRQ_MASK) >>
OCRDMA_MBX_QUERY_CFG_MAX_SRQ_OFFSET;
attr->max_ird_per_qp = (rsp->max_ird_ord_per_qp &
OCRDMA_MBX_QUERY_CFG_MAX_IRD_PER_QP_MASK) >>
OCRDMA_MBX_QUERY_CFG_MAX_IRD_PER_QP_SHIFT;

4
drivers/infiniband/hw/ocrdma/ocrdma_main.c
View File

@ -329,6 +329,10 @@ static int ocrdma_register_device(struct ocrdma_dev *dev)
dev->ibdev.dereg_mr = ocrdma_dereg_mr;
dev->ibdev.reg_user_mr = ocrdma_reg_user_mr;
dev->ibdev.alloc_fast_reg_mr = ocrdma_alloc_frmr;
dev->ibdev.alloc_fast_reg_page_list = ocrdma_alloc_frmr_page_list;
dev->ibdev.free_fast_reg_page_list = ocrdma_free_frmr_page_list;
/* mandatory to support user space verbs consumer. */
dev->ibdev.alloc_ucontext = ocrdma_alloc_ucontext;
dev->ibdev.dealloc_ucontext = ocrdma_dealloc_ucontext;

19
drivers/infiniband/hw/ocrdma/ocrdma_sli.h
View File

@ -91,6 +91,7 @@ enum {
#define OCRDMA_MAX_QP 2048
#define OCRDMA_MAX_CQ 2048
#define OCRDMA_MAX_STAG 2048
enum {
OCRDMA_DB_RQ_OFFSET = 0xE0,
@ -1564,6 +1565,7 @@ enum OCRDMA_WQE_OPCODE {
OCRDMA_SEND = 0x00,
OCRDMA_CMP_SWP = 0x14,
OCRDMA_BIND_MW = 0x10,
OCRDMA_FR_MR = 0x11,
OCRDMA_RESV1 = 0x0A,
OCRDMA_LKEY_INV = 0x15,
OCRDMA_FETCH_ADD = 0x13,
@ -1610,6 +1612,23 @@ struct ocrdma_ewqe_ud_hdr {
u32 rsvd;
};
#define OCRDMA_MAX_FR_PBES 11
struct ocrdma_fr_pbe {
u32 pa_hi;
u32 pa_lo;
};
/* extended wqe followed by hdr_wqe for Fast Memory register */
struct ocrdma_ewqe_fr {
u32 va_hi;
u32 va_lo;
u32 fbo_hi;
u32 fbo_lo;
u32 size_sge;
u32 num_sges;
struct ocrdma_fr_pbe pbe[0];
};
struct ocrdma_eth_basic {
u8 dmac[6];
u8 smac[6];

162
drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
View File

@ -96,7 +96,7 @@ int ocrdma_query_device(struct ib_device *ibdev, struct ib_device_attr *attr)
attr->max_qp_rd_atom =
min(dev->attr.max_ord_per_qp, dev->attr.max_ird_per_qp);
attr->max_qp_init_rd_atom = dev->attr.max_ord_per_qp;
attr->max_srq = (dev->attr.max_qp - 1);
attr->max_srq = dev->attr.max_srq;
attr->max_srq_sge = dev->attr.max_srq_sge;
attr->max_srq_wr = dev->attr.max_rqe;
attr->local_ca_ack_delay = dev->attr.local_ca_ack_delay;
@ -1304,7 +1304,6 @@ static void ocrdma_srq_toggle_bit(struct ocrdma_srq *srq, int idx)
static int ocrdma_hwq_free_cnt(struct ocrdma_qp_hwq_info *q)
{
int free_cnt;
return ((q->max_wqe_idx - q->head) + q->tail) % q->max_cnt;
}
@ -1746,6 +1745,96 @@ static void ocrdma_build_read(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
ext_rw->len = hdr->total_len;
}
static void build_frmr_pbes(struct ib_send_wr *wr, struct ocrdma_pbl *pbl_tbl,
struct ocrdma_hw_mr *hwmr)
{
int i;
u64 buf_addr = 0;
int num_pbes;
struct ocrdma_pbe *pbe;
pbe = (struct ocrdma_pbe *)pbl_tbl->va;
num_pbes = 0;
/* go through the OS phy regions & fill hw pbe entries into pbls. */
for (i = 0; i < wr->wr.fast_reg.page_list_len; i++) {
/* number of pbes can be more for one OS buf, when
* buffers are of different sizes.
* split the ib_buf to one or more pbes.
*/
buf_addr = wr->wr.fast_reg.page_list->page_list[i];
pbe->pa_lo = cpu_to_le32((u32) (buf_addr & PAGE_MASK));
pbe->pa_hi = cpu_to_le32((u32) upper_32_bits(buf_addr));
num_pbes += 1;
pbe++;
/* if the pbl is full storing the pbes,
* move to next pbl.
*/
if (num_pbes == (hwmr->pbl_size/sizeof(u64))) {
pbl_tbl++;
pbe = (struct ocrdma_pbe *)pbl_tbl->va;
}
}
return;
}
static int get_encoded_page_size(int pg_sz)
{
/* Max size is 256M 4096 << 16 */
int i = 0;
for (; i < 17; i++)
if (pg_sz == (4096 << i))
break;
return i;
}
static int ocrdma_build_fr(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
struct ib_send_wr *wr)
{
u64 fbo;
struct ocrdma_ewqe_fr *fast_reg = (struct ocrdma_ewqe_fr *)(hdr + 1);
struct ocrdma_mr *mr;
u32 wqe_size = sizeof(*fast_reg) + sizeof(*hdr);
wqe_size = roundup(wqe_size, OCRDMA_WQE_ALIGN_BYTES);
if ((wr->wr.fast_reg.page_list_len >
qp->dev->attr.max_pages_per_frmr) ||
(wr->wr.fast_reg.length > 0xffffffffULL))
return -EINVAL;
hdr->cw |= (OCRDMA_FR_MR << OCRDMA_WQE_OPCODE_SHIFT);
hdr->cw |= ((wqe_size / OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT);
if (wr->wr.fast_reg.page_list_len == 0)
BUG();
if (wr->wr.fast_reg.access_flags & IB_ACCESS_LOCAL_WRITE)
hdr->rsvd_lkey_flags |= OCRDMA_LKEY_FLAG_LOCAL_WR;
if (wr->wr.fast_reg.access_flags & IB_ACCESS_REMOTE_WRITE)
hdr->rsvd_lkey_flags |= OCRDMA_LKEY_FLAG_REMOTE_WR;
if (wr->wr.fast_reg.access_flags & IB_ACCESS_REMOTE_READ)
hdr->rsvd_lkey_flags |= OCRDMA_LKEY_FLAG_REMOTE_RD;
hdr->lkey = wr->wr.fast_reg.rkey;
hdr->total_len = wr->wr.fast_reg.length;
fbo = wr->wr.fast_reg.iova_start -
(wr->wr.fast_reg.page_list->page_list[0] & PAGE_MASK);
fast_reg->va_hi = upper_32_bits(wr->wr.fast_reg.iova_start);
fast_reg->va_lo = (u32) (wr->wr.fast_reg.iova_start & 0xffffffff);
fast_reg->fbo_hi = upper_32_bits(fbo);
fast_reg->fbo_lo = (u32) fbo & 0xffffffff;
fast_reg->num_sges = wr->wr.fast_reg.page_list_len;
fast_reg->size_sge =
get_encoded_page_size(1 << wr->wr.fast_reg.page_shift);
mr = (struct ocrdma_mr *)qp->dev->stag_arr[(hdr->lkey >> 8) &
(OCRDMA_MAX_STAG - 1)];
build_frmr_pbes(wr, mr->hwmr.pbl_table, &mr->hwmr);
return 0;
}
static void ocrdma_ring_sq_db(struct ocrdma_qp *qp)
{
u32 val = qp->sq.dbid | (1 << 16);
@ -1815,10 +1904,14 @@ int ocrdma_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
case IB_WR_LOCAL_INV:
hdr->cw |=
(OCRDMA_LKEY_INV << OCRDMA_WQE_OPCODE_SHIFT);
hdr->cw |= (sizeof(struct ocrdma_hdr_wqe) /
hdr->cw |= ((sizeof(struct ocrdma_hdr_wqe) +
sizeof(struct ocrdma_sge)) /
OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT;
hdr->lkey = wr->ex.invalidate_rkey;
break;
case IB_WR_FAST_REG_MR:
status = ocrdma_build_fr(qp, hdr, wr);
break;
default:
status = -EINVAL;
break;
@ -2085,6 +2178,9 @@ static void ocrdma_update_wc(struct ocrdma_qp *qp, struct ib_wc *ibwc,
case OCRDMA_SEND:
ibwc->opcode = IB_WC_SEND;
break;
case OCRDMA_FR_MR:
ibwc->opcode = IB_WC_FAST_REG_MR;
break;
case OCRDMA_LKEY_INV:
ibwc->opcode = IB_WC_LOCAL_INV;
break;
@ -2530,3 +2626,63 @@ int ocrdma_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags cq_flags)
spin_unlock_irqrestore(&cq->cq_lock, flags);
return 0;
}
struct ib_mr *ocrdma_alloc_frmr(struct ib_pd *ibpd, int max_page_list_len)
{
int status;
struct ocrdma_mr *mr;
struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
if (max_page_list_len > dev->attr.max_pages_per_frmr)
return ERR_PTR(-EINVAL);
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
status = ocrdma_get_pbl_info(dev, mr, max_page_list_len);
if (status)
goto pbl_err;
mr->hwmr.fr_mr = 1;
mr->hwmr.remote_rd = 0;
mr->hwmr.remote_wr = 0;
mr->hwmr.local_rd = 0;
mr->hwmr.local_wr = 0;
mr->hwmr.mw_bind = 0;
status = ocrdma_build_pbl_tbl(dev, &mr->hwmr);
if (status)
goto pbl_err;
status = ocrdma_reg_mr(dev, &mr->hwmr, pd->id, 0);
if (status)
goto mbx_err;
mr->ibmr.rkey = mr->hwmr.lkey;
mr->ibmr.lkey = mr->hwmr.lkey;
dev->stag_arr[(mr->hwmr.lkey >> 8) & (OCRDMA_MAX_STAG - 1)] = (u64) mr;
return &mr->ibmr;
mbx_err:
ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr);
pbl_err:
kfree(mr);
return ERR_PTR(-ENOMEM);
}
struct ib_fast_reg_page_list *ocrdma_alloc_frmr_page_list(struct ib_device
*ibdev,
int page_list_len)
{
struct ib_fast_reg_page_list *frmr_list;
int size;
size = sizeof(*frmr_list) + (page_list_len * sizeof(u64));
frmr_list = kzalloc(size, GFP_KERNEL);
if (!frmr_list)
return ERR_PTR(-ENOMEM);
frmr_list->page_list = (u64 *)(frmr_list + 1);
return frmr_list;
}
void ocrdma_free_frmr_page_list(struct ib_fast_reg_page_list *page_list)
{
kfree(page_list);
}

5
drivers/infiniband/hw/ocrdma/ocrdma_verbs.h
View File

@ -89,5 +89,10 @@ struct ib_mr *ocrdma_reg_kernel_mr(struct ib_pd *,
int num_phys_buf, int acc, u64 *iova_start);
struct ib_mr *ocrdma_reg_user_mr(struct ib_pd *, u64 start, u64 length,
u64 virt, int acc, struct ib_udata *);
struct ib_mr *ocrdma_alloc_frmr(struct ib_pd *pd, int max_page_list_len);
struct ib_fast_reg_page_list *ocrdma_alloc_frmr_page_list(struct ib_device
*ibdev,
int page_list_len);
void ocrdma_free_frmr_page_list(struct ib_fast_reg_page_list *page_list);
#endif /* __OCRDMA_VERBS_H__ */