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-rw-r--r--drivers/infiniband/hw/mlx4/cq.c20
-rw-r--r--drivers/infiniband/hw/mlx4/mlx4_ib.h2
-rw-r--r--drivers/infiniband/hw/mlx4/qp.c216
-rw-r--r--drivers/infiniband/hw/mlx4/srq.c8
-rw-r--r--drivers/infiniband/ulp/ipoib/ipoib.h4
-rw-r--r--drivers/infiniband/ulp/ipoib/ipoib_cm.c10
-rw-r--r--drivers/infiniband/ulp/ipoib/ipoib_ib.c89
-rw-r--r--drivers/infiniband/ulp/ipoib/ipoib_main.c4
-rw-r--r--drivers/infiniband/ulp/ipoib/ipoib_verbs.c10
-rw-r--r--drivers/net/mlx4/alloc.c48
-rw-r--r--drivers/net/mlx4/mr.c4
-rw-r--r--include/linux/mlx4/device.h19
-rw-r--r--include/linux/mlx4/qp.h4
-rw-r--r--include/rdma/ib_verbs.h16
14 files changed, 342 insertions, 112 deletions
diff --git a/drivers/infiniband/hw/mlx4/cq.c b/drivers/infiniband/hw/mlx4/cq.c
index 7950aa6e818..7360bbafbe8 100644
--- a/drivers/infiniband/hw/mlx4/cq.c
+++ b/drivers/infiniband/hw/mlx4/cq.c
@@ -64,13 +64,7 @@ static void mlx4_ib_cq_event(struct mlx4_cq *cq, enum mlx4_event type)
static void *get_cqe_from_buf(struct mlx4_ib_cq_buf *buf, int n)
{
- int offset = n * sizeof (struct mlx4_cqe);
-
- if (buf->buf.nbufs == 1)
- return buf->buf.u.direct.buf + offset;
- else
- return buf->buf.u.page_list[offset >> PAGE_SHIFT].buf +
- (offset & (PAGE_SIZE - 1));
+ return mlx4_buf_offset(&buf->buf, n * sizeof (struct mlx4_cqe));
}
static void *get_cqe(struct mlx4_ib_cq *cq, int n)
@@ -332,6 +326,12 @@ static int mlx4_ib_poll_one(struct mlx4_ib_cq *cq,
is_error = (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) ==
MLX4_CQE_OPCODE_ERROR;
+ if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) == MLX4_OPCODE_NOP &&
+ is_send)) {
+ printk(KERN_WARNING "Completion for NOP opcode detected!\n");
+ return -EINVAL;
+ }
+
if (!*cur_qp ||
(be32_to_cpu(cqe->my_qpn) & 0xffffff) != (*cur_qp)->mqp.qpn) {
/*
@@ -354,8 +354,10 @@ static int mlx4_ib_poll_one(struct mlx4_ib_cq *cq,
if (is_send) {
wq = &(*cur_qp)->sq;
- wqe_ctr = be16_to_cpu(cqe->wqe_index);
- wq->tail += (u16) (wqe_ctr - (u16) wq->tail);
+ if (!(*cur_qp)->sq_signal_bits) {
+ wqe_ctr = be16_to_cpu(cqe->wqe_index);
+ wq->tail += (u16) (wqe_ctr - (u16) wq->tail);
+ }
wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)];
++wq->tail;
} else if ((*cur_qp)->ibqp.srq) {
diff --git a/drivers/infiniband/hw/mlx4/mlx4_ib.h b/drivers/infiniband/hw/mlx4/mlx4_ib.h
index 28697653a37..3726e451a32 100644
--- a/drivers/infiniband/hw/mlx4/mlx4_ib.h
+++ b/drivers/infiniband/hw/mlx4/mlx4_ib.h
@@ -120,6 +120,8 @@ struct mlx4_ib_qp {
u32 doorbell_qpn;
__be32 sq_signal_bits;
+ unsigned sq_next_wqe;
+ int sq_max_wqes_per_wr;
int sq_spare_wqes;
struct mlx4_ib_wq sq;
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index 8cba9c532e6..958e205b6d7 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -30,6 +30,8 @@
* SOFTWARE.
*/
+#include <linux/log2.h>
+
#include <rdma/ib_cache.h>
#include <rdma/ib_pack.h>
@@ -96,11 +98,7 @@ static int is_qp0(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
static void *get_wqe(struct mlx4_ib_qp *qp, int offset)
{
- if (qp->buf.nbufs == 1)
- return qp->buf.u.direct.buf + offset;
- else
- return qp->buf.u.page_list[offset >> PAGE_SHIFT].buf +
- (offset & (PAGE_SIZE - 1));
+ return mlx4_buf_offset(&qp->buf, offset);
}
static void *get_recv_wqe(struct mlx4_ib_qp *qp, int n)
@@ -115,16 +113,87 @@ static void *get_send_wqe(struct mlx4_ib_qp *qp, int n)
/*
* Stamp a SQ WQE so that it is invalid if prefetched by marking the
- * first four bytes of every 64 byte chunk with 0xffffffff, except for
- * the very first chunk of the WQE.
+ * first four bytes of every 64 byte chunk with
+ * 0x7FFFFFF | (invalid_ownership_value << 31).
+ *
+ * When the max work request size is less than or equal to the WQE
+ * basic block size, as an optimization, we can stamp all WQEs with
+ * 0xffffffff, and skip the very first chunk of each WQE.
*/
-static void stamp_send_wqe(struct mlx4_ib_qp *qp, int n)
+static void stamp_send_wqe(struct mlx4_ib_qp *qp, int n, int size)
{
- u32 *wqe = get_send_wqe(qp, n);
+ u32 *wqe;
int i;
+ int s;
+ int ind;
+ void *buf;
+ __be32 stamp;
+
+ s = roundup(size, 1U << qp->sq.wqe_shift);
+ if (qp->sq_max_wqes_per_wr > 1) {
+ for (i = 0; i < s; i += 64) {
+ ind = (i >> qp->sq.wqe_shift) + n;
+ stamp = ind & qp->sq.wqe_cnt ? cpu_to_be32(0x7fffffff) :
+ cpu_to_be32(0xffffffff);
+ buf = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
+ wqe = buf + (i & ((1 << qp->sq.wqe_shift) - 1));
+ *wqe = stamp;
+ }
+ } else {
+ buf = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1));
+ for (i = 64; i < s; i += 64) {
+ wqe = buf + i;
+ *wqe = 0xffffffff;
+ }
+ }
+}
+
+static void post_nop_wqe(struct mlx4_ib_qp *qp, int n, int size)
+{
+ struct mlx4_wqe_ctrl_seg *ctrl;
+ struct mlx4_wqe_inline_seg *inl;
+ void *wqe;
+ int s;
+
+ ctrl = wqe = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1));
+ s = sizeof(struct mlx4_wqe_ctrl_seg);
- for (i = 16; i < 1 << (qp->sq.wqe_shift - 2); i += 16)
- wqe[i] = 0xffffffff;
+ if (qp->ibqp.qp_type == IB_QPT_UD) {
+ struct mlx4_wqe_datagram_seg *dgram = wqe + sizeof *ctrl;
+ struct mlx4_av *av = (struct mlx4_av *)dgram->av;
+ memset(dgram, 0, sizeof *dgram);
+ av->port_pd = cpu_to_be32((qp->port << 24) | to_mpd(qp->ibqp.pd)->pdn);
+ s += sizeof(struct mlx4_wqe_datagram_seg);
+ }
+
+ /* Pad the remainder of the WQE with an inline data segment. */
+ if (size > s) {
+ inl = wqe + s;
+ inl->byte_count = cpu_to_be32(1 << 31 | (size - s - sizeof *inl));
+ }
+ ctrl->srcrb_flags = 0;
+ ctrl->fence_size = size / 16;
+ /*
+ * Make sure descriptor is fully written before setting ownership bit
+ * (because HW can start executing as soon as we do).
+ */
+ wmb();
+
+ ctrl->owner_opcode = cpu_to_be32(MLX4_OPCODE_NOP | MLX4_WQE_CTRL_NEC) |
+ (n & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0);
+
+ stamp_send_wqe(qp, n + qp->sq_spare_wqes, size);
+}
+
+/* Post NOP WQE to prevent wrap-around in the middle of WR */
+static inline unsigned pad_wraparound(struct mlx4_ib_qp *qp, int ind)
+{
+ unsigned s = qp->sq.wqe_cnt - (ind & (qp->sq.wqe_cnt - 1));
+ if (unlikely(s < qp->sq_max_wqes_per_wr)) {
+ post_nop_wqe(qp, ind, s << qp->sq.wqe_shift);
+ ind += s;
+ }
+ return ind;
}
static void mlx4_ib_qp_event(struct mlx4_qp *qp, enum mlx4_event type)
@@ -241,6 +310,8 @@ static int set_rq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
static int set_kernel_sq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
enum ib_qp_type type, struct mlx4_ib_qp *qp)
{
+ int s;
+
/* Sanity check SQ size before proceeding */
if (cap->max_send_wr > dev->dev->caps.max_wqes ||
cap->max_send_sge > dev->dev->caps.max_sq_sg ||
@@ -256,20 +327,74 @@ static int set_kernel_sq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
cap->max_send_sge + 2 > dev->dev->caps.max_sq_sg)
return -EINVAL;
- qp->sq.wqe_shift = ilog2(roundup_pow_of_two(max(cap->max_send_sge *
- sizeof (struct mlx4_wqe_data_seg),
- cap->max_inline_data +
- sizeof (struct mlx4_wqe_inline_seg)) +
- send_wqe_overhead(type)));
- qp->sq.max_gs = ((1 << qp->sq.wqe_shift) - send_wqe_overhead(type)) /
- sizeof (struct mlx4_wqe_data_seg);
+ s = max(cap->max_send_sge * sizeof (struct mlx4_wqe_data_seg),
+ cap->max_inline_data + sizeof (struct mlx4_wqe_inline_seg)) +
+ send_wqe_overhead(type);
/*
- * We need to leave 2 KB + 1 WQE of headroom in the SQ to
- * allow HW to prefetch.
+ * Hermon supports shrinking WQEs, such that a single work
+ * request can include multiple units of 1 << wqe_shift. This
+ * way, work requests can differ in size, and do not have to
+ * be a power of 2 in size, saving memory and speeding up send
+ * WR posting. Unfortunately, if we do this then the
+ * wqe_index field in CQEs can't be used to look up the WR ID
+ * anymore, so we do this only if selective signaling is off.
+ *
+ * Further, on 32-bit platforms, we can't use vmap() to make
+ * the QP buffer virtually contigious. Thus we have to use
+ * constant-sized WRs to make sure a WR is always fully within
+ * a single page-sized chunk.
+ *
+ * Finally, we use NOP work requests to pad the end of the
+ * work queue, to avoid wrap-around in the middle of WR. We
+ * set NEC bit to avoid getting completions with error for
+ * these NOP WRs, but since NEC is only supported starting
+ * with firmware 2.2.232, we use constant-sized WRs for older
+ * firmware.
+ *
+ * And, since MLX QPs only support SEND, we use constant-sized
+ * WRs in this case.
+ *
+ * We look for the smallest value of wqe_shift such that the
+ * resulting number of wqes does not exceed device
+ * capabilities.
+ *
+ * We set WQE size to at least 64 bytes, this way stamping
+ * invalidates each WQE.
*/
- qp->sq_spare_wqes = (2048 >> qp->sq.wqe_shift) + 1;
- qp->sq.wqe_cnt = roundup_pow_of_two(cap->max_send_wr + qp->sq_spare_wqes);
+ if (dev->dev->caps.fw_ver >= MLX4_FW_VER_WQE_CTRL_NEC &&
+ qp->sq_signal_bits && BITS_PER_LONG == 64 &&
+ type != IB_QPT_SMI && type != IB_QPT_GSI)
+ qp->sq.wqe_shift = ilog2(64);
+ else
+ qp->sq.wqe_shift = ilog2(roundup_pow_of_two(s));
+
+ for (;;) {
+ if (1 << qp->sq.wqe_shift > dev->dev->caps.max_sq_desc_sz)
+ return -EINVAL;
+
+ qp->sq_max_wqes_per_wr = DIV_ROUND_UP(s, 1U << qp->sq.wqe_shift);
+
+ /*
+ * We need to leave 2 KB + 1 WR of headroom in the SQ to
+ * allow HW to prefetch.
+ */
+ qp->sq_spare_wqes = (2048 >> qp->sq.wqe_shift) + qp->sq_max_wqes_per_wr;
+ qp->sq.wqe_cnt = roundup_pow_of_two(cap->max_send_wr *
+ qp->sq_max_wqes_per_wr +
+ qp->sq_spare_wqes);
+
+ if (qp->sq.wqe_cnt <= dev->dev->caps.max_wqes)
+ break;
+
+ if (qp->sq_max_wqes_per_wr <= 1)
+ return -EINVAL;
+
+ ++qp->sq.wqe_shift;
+ }
+
+ qp->sq.max_gs = ((qp->sq_max_wqes_per_wr << qp->sq.wqe_shift) -
+ send_wqe_overhead(type)) / sizeof (struct mlx4_wqe_data_seg);
qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
(qp->sq.wqe_cnt << qp->sq.wqe_shift);
@@ -281,7 +406,8 @@ static int set_kernel_sq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
qp->sq.offset = 0;
}
- cap->max_send_wr = qp->sq.max_post = qp->sq.wqe_cnt - qp->sq_spare_wqes;
+ cap->max_send_wr = qp->sq.max_post =
+ (qp->sq.wqe_cnt - qp->sq_spare_wqes) / qp->sq_max_wqes_per_wr;
cap->max_send_sge = qp->sq.max_gs;
/* We don't support inline sends for kernel QPs (yet) */
cap->max_inline_data = 0;
@@ -327,6 +453,12 @@ static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
qp->rq.tail = 0;
qp->sq.head = 0;
qp->sq.tail = 0;
+ qp->sq_next_wqe = 0;
+
+ if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
+ qp->sq_signal_bits = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
+ else
+ qp->sq_signal_bits = 0;
err = set_rq_size(dev, &init_attr->cap, !!pd->uobject, !!init_attr->srq, qp);
if (err)
@@ -417,11 +549,6 @@ static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
*/
qp->doorbell_qpn = swab32(qp->mqp.qpn << 8);
- if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
- qp->sq_signal_bits = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
- else
- qp->sq_signal_bits = 0;
-
qp->mqp.event = mlx4_ib_qp_event;
return 0;
@@ -916,7 +1043,7 @@ static int __mlx4_ib_modify_qp(struct ib_qp *ibqp,
ctrl = get_send_wqe(qp, i);
ctrl->owner_opcode = cpu_to_be32(1 << 31);
- stamp_send_wqe(qp, i);
+ stamp_send_wqe(qp, i, 1 << qp->sq.wqe_shift);
}
}
@@ -969,6 +1096,7 @@ static int __mlx4_ib_modify_qp(struct ib_qp *ibqp,
qp->rq.tail = 0;
qp->sq.head = 0;
qp->sq.tail = 0;
+ qp->sq_next_wqe = 0;
if (!ibqp->srq)
*qp->db.db = 0;
}
@@ -1278,13 +1406,14 @@ int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
unsigned long flags;
int nreq;
int err = 0;
- int ind;
- int size;
+ unsigned ind;
+ int uninitialized_var(stamp);
+ int uninitialized_var(size);
int i;
spin_lock_irqsave(&qp->sq.lock, flags);
- ind = qp->sq.head;
+ ind = qp->sq_next_wqe;
for (nreq = 0; wr; ++nreq, wr = wr->next) {
if (mlx4_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
@@ -1300,7 +1429,7 @@ int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
}
ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
- qp->sq.wrid[ind & (qp->sq.wqe_cnt - 1)] = wr->wr_id;
+ qp->sq.wrid[(qp->sq.head + nreq) & (qp->sq.wqe_cnt - 1)] = wr->wr_id;
ctrl->srcrb_flags =
(wr->send_flags & IB_SEND_SIGNALED ?
@@ -1413,16 +1542,23 @@ int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] |
(ind & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0);
+ stamp = ind + qp->sq_spare_wqes;
+ ind += DIV_ROUND_UP(size * 16, 1U << qp->sq.wqe_shift);
+
/*
* We can improve latency by not stamping the last
* send queue WQE until after ringing the doorbell, so
* only stamp here if there are still more WQEs to post.
+ *
+ * Same optimization applies to padding with NOP wqe
+ * in case of WQE shrinking (used to prevent wrap-around
+ * in the middle of WR).
*/
- if (wr->next)
- stamp_send_wqe(qp, (ind + qp->sq_spare_wqes) &
- (qp->sq.wqe_cnt - 1));
+ if (wr->next) {
+ stamp_send_wqe(qp, stamp, size * 16);
+ ind = pad_wraparound(qp, ind);
+ }
- ++ind;
}
out:
@@ -1444,8 +1580,10 @@ out:
*/
mmiowb();
- stamp_send_wqe(qp, (ind + qp->sq_spare_wqes - 1) &
- (qp->sq.wqe_cnt - 1));
+ stamp_send_wqe(qp, stamp, size * 16);
+
+ ind = pad_wraparound(qp, ind);
+ qp->sq_next_wqe = ind;
}
spin_unlock_irqrestore(&qp->sq.lock, flags);
diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
index e7e9a3d0dac..beaa3b06cf5 100644
--- a/drivers/infiniband/hw/mlx4/srq.c
+++ b/drivers/infiniband/hw/mlx4/srq.c
@@ -38,13 +38,7 @@
static void *get_wqe(struct mlx4_ib_srq *srq, int n)
{
- int offset = n << srq->msrq.wqe_shift;
-
- if (srq->buf.nbufs == 1)
- return srq->buf.u.direct.buf + offset;
- else
- return srq->buf.u.page_list[offset >> PAGE_SHIFT].buf +
- (offset & (PAGE_SIZE - 1));
+ return mlx4_buf_offset(&srq->buf, n << srq->msrq.wqe_shift);
}
static void mlx4_ib_srq_event(struct mlx4_srq *srq, enum mlx4_event type)
diff --git a/drivers/infiniband/ulp/ipoib/ipoib.h b/drivers/infiniband/ulp/ipoib/ipoib.h
index fe250c60607..f9b7caa5414 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib.h
+++ b/drivers/infiniband/ulp/ipoib/ipoib.h
@@ -143,7 +143,7 @@ struct ipoib_rx_buf {
struct ipoib_tx_buf {
struct sk_buff *skb;
- u64 mapping;
+ u64 mapping[MAX_SKB_FRAGS + 1];
};
struct ib_cm_id;
@@ -296,7 +296,7 @@ struct ipoib_dev_priv {
struct ipoib_tx_buf *tx_ring;
unsigned tx_head;
unsigned tx_tail;
- struct ib_sge tx_sge;
+ struct ib_sge tx_sge[MAX_SKB_FRAGS + 1];
struct ib_send_wr tx_wr;
unsigned tx_outstanding;
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_cm.c b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
index 1818f958c25..7dd2ec473d2 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_cm.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
@@ -634,8 +634,8 @@ static inline int post_send(struct ipoib_dev_priv *priv,
{
struct ib_send_wr *bad_wr;
- priv->tx_sge.addr = addr;
- priv->tx_sge.length = len;
+ priv->tx_sge[0].addr = addr;
+ priv->tx_sge[0].length = len;
priv->tx_wr.wr_id = wr_id | IPOIB_OP_CM;
@@ -676,7 +676,7 @@ void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_
return;
}
- tx_req->mapping = addr;
+ tx_req->mapping[0] = addr;
if (unlikely(post_send(priv, tx, tx->tx_head & (ipoib_sendq_size - 1),
addr, skb->len))) {
@@ -715,7 +715,7 @@ void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
tx_req = &tx->tx_ring[wr_id];
- ib_dma_unmap_single(priv->ca, tx_req->mapping, tx_req->skb->len, DMA_TO_DEVICE);
+ ib_dma_unmap_single(priv->ca, tx_req->mapping[0], tx_req->skb->len, DMA_TO_DEVICE);
/* FIXME: is this right? Shouldn't we only increment on success? */
++dev->stats.tx_packets;
@@ -1110,7 +1110,7 @@ timeout:
while ((int) p->tx_tail - (int) p->tx_head < 0) {
tx_req = &p->tx_ring[p->tx_tail & (ipoib_sendq_size - 1)];
- ib_dma_unmap_single(priv->ca, tx_req->mapping, tx_req->skb->len,
+ ib_dma_unmap_single(priv->ca, tx_req->mapping[0], tx_req->skb->len,
DMA_TO_DEVICE);
dev_kfree_skb_any(tx_req->skb);
++p->tx_tail;
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_ib.c b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
index 52bc2bd5799..9d3e778dc56 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_ib.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
@@ -239,6 +239,54 @@ repost:
"for buf %d\n", wr_id);
}
+static int ipoib_dma_map_tx(struct ib_device *ca,
+ struct ipoib_tx_buf *tx_req)
+{
+ struct sk_buff *skb = tx_req->skb;
+ u64 *mapping = tx_req->mapping;
+ int i;
+
+ mapping[0] = ib_dma_map_single(ca, skb->data, skb_headlen(skb),
+ DMA_TO_DEVICE);
+ if (unlikely(ib_dma_mapping_error(ca, mapping[0])))
+ return -EIO;
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) {
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+ mapping[i + 1] = ib_dma_map_page(ca, frag->page,
+ frag->page_offset, frag->size,
+ DMA_TO_DEVICE);
+ if (unlikely(ib_dma_mapping_error(ca, mapping[i + 1])))
+ goto partial_error;
+ }
+ return 0;
+
+partial_error:
+ ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE);
+
+ for (; i > 0; --i) {
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
+ ib_dma_unmap_page(ca, mapping[i], frag->size, DMA_TO_DEVICE);
+ }
+ return -EIO;
+}
+
+static void ipoib_dma_unmap_tx(struct ib_device *ca,
+ struct ipoib_tx_buf *tx_req)
+{
+ struct sk_buff *skb = tx_req->skb;
+ u64 *mapping = tx_req->mapping;
+ int i;
+
+ ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE);
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) {
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+ ib_dma_unmap_page(ca, mapping[i + 1], frag->size,
+ DMA_TO_DEVICE);
+ }
+}
+
static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
@@ -257,8 +305,7 @@ static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
tx_req = &priv->tx_ring[wr_id];
- ib_dma_unmap_single(priv->ca, tx_req->mapping,
- tx_req->skb->len, DMA_TO_DEVICE);
+ ipoib_dma_unmap_tx(priv->ca, tx_req);
++dev->stats.tx_packets;
dev->stats.tx_bytes += tx_req->skb->len;
@@ -341,16 +388,23 @@ void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr)
static inline int post_send(struct ipoib_dev_priv *priv,
unsigned int wr_id,
struct ib_ah *address, u32 qpn,
- u64 addr, int len)
+ u64 *mapping, int headlen,
+ skb_frag_t *frags,
+ int nr_frags)
{
struct ib_send_wr *bad_wr;
+ int i;
- priv->tx_sge.addr = addr;
- priv->tx_sge.length = len;
-
- priv->tx_wr.wr_id = wr_id;
- priv->tx_wr.wr.ud.remote_qpn = qpn;
- priv->tx_wr.wr.ud.ah = address;
+ priv->tx_sge[0].addr = mapping[0];
+ priv->tx_sge[0].length = headlen;
+ for (i = 0; i < nr_frags; ++i) {
+ priv->tx_sge[i + 1].addr = mapping[i + 1];
+ priv->tx_sge[i + 1].length = frags[i].size;
+ }
+ priv->tx_wr.num_sge = nr_frags + 1;
+ priv->tx_wr.wr_id = wr_id;
+ priv->tx_wr.wr.ud.remote_qpn = qpn;
+ priv->tx_wr.wr.ud.ah = address;
return ib_post_send(priv->qp, &priv->tx_wr, &bad_wr);
}
@@ -360,7 +414,6 @@ void ipoib_send(struct net_device *dev, struct sk_buff *skb,
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_tx_buf *tx_req;
- u64 addr;
if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) {
ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n",
@@ -383,20 +436,19 @@ void ipoib_send(struct net_device *dev, struct sk_buff *skb,
*/
tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)];
tx_req->skb = skb;
- addr = ib_dma_map_single(priv->ca, skb->data, skb->len,
- DMA_TO_DEVICE);
- if (unlikely(ib_dma_mapping_error(priv->ca, addr))) {
+ if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) {
++dev->stats.tx_errors;
dev_kfree_skb_any(skb);
return;
}
- tx_req->mapping = addr;
if (unlikely(post_send(priv, priv->tx_head & (ipoib_sendq_size - 1),
- address->ah, qpn, addr, skb->len))) {
+ address->ah, qpn,
+ tx_req->mapping, skb_headlen(skb),
+ skb_shinfo(skb)->frags, skb_shinfo(skb)->nr_frags))) {
ipoib_warn(priv, "post_send failed\n");
++dev->stats.tx_errors;
- ib_dma_unmap_single(priv->ca, addr, skb->len, DMA_TO_DEVICE);
+ ipoib_dma_unmap_tx(priv->ca, tx_req);
dev_kfree_skb_any(skb);
} else {
dev->trans_start = jiffies;
@@ -615,10 +667,7 @@ int ipoib_ib_dev_stop(struct net_device *dev, int flush)
while ((int) priv->tx_tail - (int) priv->tx_head < 0) {
tx_req = &priv->tx_ring[priv->tx_tail &
(ipoib_sendq_size - 1)];
- ib_dma_unmap_single(priv->ca,
- tx_req->mapping,
- tx_req->skb->len,
- DMA_TO_DEVICE);
+ ipoib_dma_unmap_tx(priv->ca, tx_req);
dev_kfree_skb_any(tx_req->skb);
++priv->tx_tail;
--priv->tx_outstanding;
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index 09f5371137a..f96477a8ca5 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -965,7 +965,9 @@ static void ipoib_setup(struct net_device *dev)
dev->addr_len = INFINIBAND_ALEN;
dev->type = ARPHRD_INFINIBAND;
dev->tx_queue_len = ipoib_sendq_size * 2;
- dev->features = NETIF_F_VLAN_CHALLENGED | NETIF_F_LLTX;
+ dev->features = (NETIF_F_VLAN_CHALLENGED |
+ NETIF_F_LLTX |
+ NETIF_F_HIGHDMA);
/* MTU will be reset when mcast join happens */
dev->mtu = IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN;
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_verbs.c b/drivers/infiniband/ulp/ipoib/ipoib_verbs.c
index 433e99ac227..a3aeb911f02 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_verbs.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_verbs.c
@@ -157,6 +157,7 @@ int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
};
int ret, size;
+ int i;
priv->pd = ib_alloc_pd(priv->ca);
if (IS_ERR(priv->pd)) {
@@ -191,6 +192,9 @@ int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
init_attr.send_cq = priv->cq;
init_attr.recv_cq = priv->cq;
+ if (dev->features & NETIF_F_SG)
+ init_attr.cap.max_send_sge = MAX_SKB_FRAGS + 1;
+
priv->qp = ib_create_qp(priv->pd, &init_attr);
if (IS_ERR(priv->qp)) {
printk(KERN_WARNING "%s: failed to create QP\n", ca->name);
@@ -201,11 +205,11 @@ int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
priv->dev->dev_addr[2] = (priv->qp->qp_num >> 8) & 0xff;
priv->dev->dev_addr[3] = (priv->qp->qp_num ) & 0xff;
- priv->tx_sge.lkey = priv->mr->lkey;
+ for (i = 0; i < MAX_SKB_FRAGS + 1; ++i)
+ priv->tx_sge[i].lkey = priv->mr->lkey;
priv->tx_wr.opcode = IB_WR_SEND;
- priv->tx_wr.sg_list = &priv->tx_sge;
- priv->tx_wr.num_sge = 1;
+ priv->tx_wr.sg_list = priv->tx_sge;
priv->tx_wr.send_flags = IB_SEND_SIGNALED;
return 0;
diff --git a/drivers/net/mlx4/alloc.c b/drivers/net/mlx4/alloc.c
index b226e019bc8..521dc0322ee 100644
--- a/drivers/net/mlx4/alloc.c
+++ b/drivers/net/mlx4/alloc.c
@@ -116,40 +116,53 @@ int mlx4_buf_alloc(struct mlx4_dev *dev, int size, int max_direct,
buf->nbufs = 1;
buf->npages = 1;
buf->page_shift = get_order(size) + PAGE_SHIFT;
- buf->u.direct.buf = dma_alloc_coherent(&dev->pdev->dev,
+ buf->direct.buf = dma_alloc_coherent(&dev->pdev->dev,
size, &t, GFP_KERNEL);
- if (!buf->u.direct.buf)
+ if (!buf->direct.buf)
return -ENOMEM;
- buf->u.direct.map = t;
+ buf->direct.map = t;
while (t & ((1 << buf->page_shift) - 1)) {
--buf->page_shift;
buf->npages *= 2;
}
- memset(buf->u.direct.buf, 0, size);
+ memset(buf->direct.buf, 0, size);
} else {
int i;
buf->nbufs = (size + PAGE_SIZE - 1) / PAGE_SIZE;
buf->npages = buf->nbufs;
buf->page_shift = PAGE_SHIFT;
- buf->u.page_list = kzalloc(buf->nbufs * sizeof *buf->u.page_list,
+ buf->page_list = kzalloc(buf->nbufs * sizeof *buf->page_list,
GFP_KERNEL);
- if (!buf->u.page_list)
+ if (!buf->page_list)
return -ENOMEM;
for (i = 0; i < buf->nbufs; ++i) {
- buf->u.page_list[i].buf =
+ buf->page_list[i].buf =
dma_alloc_coherent(&dev->pdev->dev, PAGE_SIZE,
&t, GFP_KERNEL);
- if (!buf->u.page_list[i].buf)
+ if (!buf->page_list[i].buf)
goto err_free;
- buf->u.page_list[i].map = t;
+ buf->page_list[i].map = t;
- memset(buf->u.page_list[i].buf, 0, PAGE_SIZE);
+ memset(buf->page_list[i].buf, 0, PAGE_SIZE);
+ }
+
+ if (BITS_PER_LONG == 64) {
+ struct page **pages;
+ pages = kmalloc(sizeof *pages * buf->nbufs, GFP_KERNEL);
+ if (!pages)
+ goto err_free;
+ for (i = 0; i < buf->nbufs; ++i)
+ pages[i] = virt_to_page(buf->page_list[i].buf);
+ buf->direct.buf = vmap(pages, buf->nbufs, VM_MAP, PAGE_KERNEL);
+ kfree(pages);
+ if (!buf->direct.buf)
+ goto err_free;
}
}
@@ -167,15 +180,18 @@ void mlx4_buf_free(struct mlx4_dev *dev, int size, struct mlx4_buf *buf)
int i;
if (buf->nbufs == 1)
- dma_free_coherent(&dev->pdev->dev, size, buf->u.direct.buf,
- buf->u.direct.map);
+ dma_free_coherent(&dev->pdev->dev, size, buf->direct.buf,
+ buf->direct.map);
else {
+ if (BITS_PER_LONG == 64)
+ vunmap(buf->direct.buf);
+
for (i = 0; i < buf->nbufs; ++i)
- if (buf->u.page_list[i].buf)
+ if (buf->page_list[i].buf)
dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
- buf->u.page_list[i].buf,
- buf->u.page_list[i].map);
- kfree(buf->u.page_list);
+ buf->page_list[i].buf,
+ buf->page_list[i].map);
+ kfree(buf->page_list);
}
}
EXPORT_SYMBOL_GPL(mlx4_buf_free);
diff --git a/drivers/net/mlx4/mr.c b/drivers/net/mlx4/mr.c
index 9c9e308d091..679dfdb6807 100644
--- a/drivers/net/mlx4/mr.c
+++ b/drivers/net/mlx4/mr.c
@@ -419,9 +419,9 @@ int mlx4_buf_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
for (i = 0; i < buf->npages; ++i)
if (buf->nbufs == 1)
- page_list[i] = buf->u.direct.map + (i << buf->page_shift);
+ page_list[i] = buf->direct.map + (i << buf->page_shift);
else
- page_list[i] = buf->u.page_list[i].map;
+ page_list[i] = buf->page_list[i].map;
err = mlx4_write_mtt(dev, mtt, 0, buf->npages, page_list);
diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index 222815d91c4..6cdf813cd47 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -133,6 +133,11 @@ enum {
MLX4_STAT_RATE_OFFSET = 5
};
+static inline u64 mlx4_fw_ver(u64 major, u64 minor, u64 subminor)
+{
+ return (major << 32) | (minor << 16) | subminor;
+}
+
struct mlx4_caps {
u64 fw_ver;
int num_ports;
@@ -189,10 +194,8 @@ struct mlx4_buf_list {
};
struct mlx4_buf {
- union {
- struct mlx4_buf_list direct;
- struct mlx4_buf_list *page_list;
- } u;
+ struct mlx4_buf_list direct;
+ struct mlx4_buf_list *page_list;
int nbufs;
int npages;
int page_shift;
@@ -308,6 +311,14 @@ struct mlx4_init_port_param {
int mlx4_buf_alloc(struct mlx4_dev *dev, int size, int max_direct,
struct mlx4_buf *buf);
void mlx4_buf_free(struct mlx4_dev *dev, int size, struct mlx4_buf *buf);
+static inline void *mlx4_buf_offset(struct mlx4_buf *buf, int offset)
+{
+ if (BITS_PER_LONG == 64 || buf->nbufs == 1)
+ return buf->direct.buf + offset;
+ else
+ return buf->page_list[offset >> PAGE_SHIFT].buf +
+ (offset & (PAGE_SIZE - 1));
+}
int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn);
void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn);
diff --git a/include/linux/mlx4/qp.h b/include/linux/mlx4/qp.h
index 3968b943259..09a2230923f 100644
--- a/include/linux/mlx4/qp.h
+++ b/include/linux/mlx4/qp.h
@@ -154,7 +154,11 @@ struct mlx4_qp_context {
u32 reserved5[10];
};
+/* Which firmware version adds support for NEC (NoErrorCompletion) bit */
+#define MLX4_FW_VER_WQE_CTRL_NEC mlx4_fw_ver(2, 2, 232)
+
enum {
+ MLX4_WQE_CTRL_NEC = 1 << 29,
MLX4_WQE_CTRL_FENCE = 1 << 6,
MLX4_WQE_CTRL_CQ_UPDATE = 3 << 2,
MLX4_WQE_CTRL_SOLICITED = 1 << 1,
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index cfbd38fe299..701e7b40560 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -95,7 +95,15 @@ enum ib_device_cap_flags {
IB_DEVICE_N_NOTIFY_CQ = (1<<14),
IB_DEVICE_ZERO_STAG = (1<<15),
IB_DEVICE_SEND_W_INV = (1<<16),
- IB_DEVICE_MEM_WINDOW = (1<<17)
+ IB_DEVICE_MEM_WINDOW = (1<<17),
+ /*
+ * Devices should set IB_DEVICE_UD_IP_SUM if they support
+ * insertion of UDP and TCP checksum on outgoing UD IPoIB
+ * messages and can verify the validity of checksum for
+ * incoming messages. Setting this flag implies that the
+ * IPoIB driver may set NETIF_F_IP_CSUM for datagram mode.
+ */
+ IB_DEVICE_UD_IP_CSUM = (1<<18),
};
enum ib_atomic_cap {
@@ -431,6 +439,7 @@ struct ib_wc {
u8 sl;
u8 dlid_path_bits;
u8 port_num; /* valid only for DR SMPs on switches */
+ int csum_ok;
};
enum ib_cq_notify_flags {
@@ -615,7 +624,8 @@ enum ib_send_flags {
IB_SEND_FENCE = 1,
IB_SEND_SIGNALED = (1<<1),
IB_SEND_SOLICITED = (1<<2),
- IB_SEND_INLINE = (1<<3)
+ IB_SEND_INLINE = (1<<3),
+ IB_SEND_IP_CSUM = (1<<4)
};
struct ib_sge {
@@ -890,8 +900,6 @@ struct ib_device {
int *pkey_tbl_len;
int *gid_tbl_len;
- u32 flags;
-
int num_comp_vectors;
struct iw_cm_verbs *iwcm;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-01 06:52:50 +0000