/*
* Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
+ * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
+ * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
- *
- * $Id: ipoib_ib.c 1386 2004-12-27 16:23:17Z roland $
*/
#include <linux/delay.h>
#include <linux/dma-mapping.h>
+#include <linux/slab.h>
-#include <ib_cache.h>
+#include <linux/ip.h>
+#include <linux/tcp.h>
#include "ipoib.h"
"Enable data path debug tracing if > 0");
#endif
-#define IPOIB_OP_RECV (1ul << 31)
-
-static DECLARE_MUTEX(pkey_sem);
+static DEFINE_MUTEX(pkey_mutex);
struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
struct ib_pd *pd, struct ib_ah_attr *attr)
unsigned long flags;
- if (ah->last_send <= priv->tx_tail) {
- ipoib_dbg(priv, "Freeing ah %p\n", ah->ah);
- ib_destroy_ah(ah->ah);
- kfree(ah);
- } else {
- spin_lock_irqsave(&priv->lock, flags);
- list_add_tail(&ah->list, &priv->dead_ahs);
- spin_unlock_irqrestore(&priv->lock, flags);
- }
-}
-
-static inline int ipoib_ib_receive(struct ipoib_dev_priv *priv,
- unsigned int wr_id,
- dma_addr_t addr)
-{
- struct ib_sge list = {
- .addr = addr,
- .length = IPOIB_BUF_SIZE,
- .lkey = priv->mr->lkey,
- };
- struct ib_recv_wr param = {
- .wr_id = wr_id | IPOIB_OP_RECV,
- .sg_list = &list,
- .num_sge = 1,
- };
- struct ib_recv_wr *bad_wr;
+ spin_lock_irqsave(&priv->lock, flags);
+ list_add_tail(&ah->list, &priv->dead_ahs);
+ spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+static void ipoib_ud_dma_unmap_rx(struct ipoib_dev_priv *priv,
+ u64 mapping[IPOIB_UD_RX_SG])
+{
+ if (ipoib_ud_need_sg(priv->max_ib_mtu)) {
+ ib_dma_unmap_single(priv->ca, mapping[0], IPOIB_UD_HEAD_SIZE,
+ DMA_FROM_DEVICE);
+ ib_dma_unmap_page(priv->ca, mapping[1], PAGE_SIZE,
+ DMA_FROM_DEVICE);
+ } else
+ ib_dma_unmap_single(priv->ca, mapping[0],
+ IPOIB_UD_BUF_SIZE(priv->max_ib_mtu),
+ DMA_FROM_DEVICE);
+}
+
+static void ipoib_ud_skb_put_frags(struct ipoib_dev_priv *priv,
+ struct sk_buff *skb,
+ unsigned int length)
+{
+ if (ipoib_ud_need_sg(priv->max_ib_mtu)) {
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[0];
+ unsigned int size;
+ /*
+ * There is only two buffers needed for max_payload = 4K,
+ * first buf size is IPOIB_UD_HEAD_SIZE
+ */
+ skb->tail += IPOIB_UD_HEAD_SIZE;
+ skb->len += length;
+
+ size = length - IPOIB_UD_HEAD_SIZE;
+
+ frag->size = size;
+ skb->data_len += size;
+ skb->truesize += size;
+ } else
+ skb_put(skb, length);
- return ib_post_recv(priv->qp, ¶m, &bad_wr);
}
static int ipoib_ib_post_receive(struct net_device *dev, int id)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
- struct sk_buff *skb;
- dma_addr_t addr;
+ struct ib_recv_wr *bad_wr;
int ret;
- skb = dev_alloc_skb(IPOIB_BUF_SIZE + 4);
- if (!skb) {
- ipoib_warn(priv, "failed to allocate receive buffer\n");
+ priv->rx_wr.wr_id = id | IPOIB_OP_RECV;
+ priv->rx_sge[0].addr = priv->rx_ring[id].mapping[0];
+ priv->rx_sge[1].addr = priv->rx_ring[id].mapping[1];
- priv->rx_ring[id].skb = NULL;
- return -ENOMEM;
- }
- skb_reserve(skb, 4); /* 16 byte align IP header */
- priv->rx_ring[id].skb = skb;
- addr = dma_map_single(priv->ca->dma_device,
- skb->data, IPOIB_BUF_SIZE,
- DMA_FROM_DEVICE);
- pci_unmap_addr_set(&priv->rx_ring[id], mapping, addr);
- ret = ipoib_ib_receive(priv, id, addr);
- if (ret) {
- ipoib_warn(priv, "ipoib_ib_receive failed for buf %d (%d)\n",
- id, ret);
- dma_unmap_single(priv->ca->dma_device, addr,
- IPOIB_BUF_SIZE, DMA_FROM_DEVICE);
- dev_kfree_skb_any(skb);
+ ret = ib_post_recv(priv->qp, &priv->rx_wr, &bad_wr);
+ if (unlikely(ret)) {
+ ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret);
+ ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[id].mapping);
+ dev_kfree_skb_any(priv->rx_ring[id].skb);
priv->rx_ring[id].skb = NULL;
}
return ret;
}
+static struct sk_buff *ipoib_alloc_rx_skb(struct net_device *dev, int id)
+{
+ struct ipoib_dev_priv *priv = netdev_priv(dev);
+ struct sk_buff *skb;
+ int buf_size;
+ u64 *mapping;
+
+ if (ipoib_ud_need_sg(priv->max_ib_mtu))
+ buf_size = IPOIB_UD_HEAD_SIZE;
+ else
+ buf_size = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu);
+
+ skb = dev_alloc_skb(buf_size + 4);
+ if (unlikely(!skb))
+ return NULL;
+
+ /*
+ * IB will leave a 40 byte gap for a GRH and IPoIB adds a 4 byte
+ * header. So we need 4 more bytes to get to 48 and align the
+ * IP header to a multiple of 16.
+ */
+ skb_reserve(skb, 4);
+
+ mapping = priv->rx_ring[id].mapping;
+ mapping[0] = ib_dma_map_single(priv->ca, skb->data, buf_size,
+ DMA_FROM_DEVICE);
+ if (unlikely(ib_dma_mapping_error(priv->ca, mapping[0])))
+ goto error;
+
+ if (ipoib_ud_need_sg(priv->max_ib_mtu)) {
+ struct page *page = alloc_page(GFP_ATOMIC);
+ if (!page)
+ goto partial_error;
+ skb_fill_page_desc(skb, 0, page, 0, PAGE_SIZE);
+ mapping[1] =
+ ib_dma_map_page(priv->ca, skb_shinfo(skb)->frags[0].page,
+ 0, PAGE_SIZE, DMA_FROM_DEVICE);
+ if (unlikely(ib_dma_mapping_error(priv->ca, mapping[1])))
+ goto partial_error;
+ }
+
+ priv->rx_ring[id].skb = skb;
+ return skb;
+
+partial_error:
+ ib_dma_unmap_single(priv->ca, mapping[0], buf_size, DMA_FROM_DEVICE);
+error:
+ dev_kfree_skb_any(skb);
+ return NULL;
+}
+
static int ipoib_ib_post_receives(struct net_device *dev)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
int i;
- for (i = 0; i < IPOIB_RX_RING_SIZE; ++i) {
+ for (i = 0; i < ipoib_recvq_size; ++i) {
+ if (!ipoib_alloc_rx_skb(dev, i)) {
+ ipoib_warn(priv, "failed to allocate receive buffer %d\n", i);
+ return -ENOMEM;
+ }
if (ipoib_ib_post_receive(dev, i)) {
ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i);
return -EIO;
return 0;
}
-static void ipoib_ib_handle_wc(struct net_device *dev,
- struct ib_wc *wc)
+static void ipoib_ib_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
+{
+ struct ipoib_dev_priv *priv = netdev_priv(dev);
+ unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV;
+ struct sk_buff *skb;
+ u64 mapping[IPOIB_UD_RX_SG];
+
+ ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n",
+ wr_id, wc->status);
+
+ if (unlikely(wr_id >= ipoib_recvq_size)) {
+ ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n",
+ wr_id, ipoib_recvq_size);
+ return;
+ }
+
+ skb = priv->rx_ring[wr_id].skb;
+
+ if (unlikely(wc->status != IB_WC_SUCCESS)) {
+ if (wc->status != IB_WC_WR_FLUSH_ERR)
+ ipoib_warn(priv, "failed recv event "
+ "(status=%d, wrid=%d vend_err %x)\n",
+ wc->status, wr_id, wc->vendor_err);
+ ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[wr_id].mapping);
+ dev_kfree_skb_any(skb);
+ priv->rx_ring[wr_id].skb = NULL;
+ return;
+ }
+
+ /*
+ * Drop packets that this interface sent, ie multicast packets
+ * that the HCA has replicated.
+ */
+ if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num)
+ goto repost;
+
+ memcpy(mapping, priv->rx_ring[wr_id].mapping,
+ IPOIB_UD_RX_SG * sizeof *mapping);
+
+ /*
+ * If we can't allocate a new RX buffer, dump
+ * this packet and reuse the old buffer.
+ */
+ if (unlikely(!ipoib_alloc_rx_skb(dev, wr_id))) {
+ ++dev->stats.rx_dropped;
+ goto repost;
+ }
+
+ ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n",
+ wc->byte_len, wc->slid);
+
+ ipoib_ud_dma_unmap_rx(priv, mapping);
+ ipoib_ud_skb_put_frags(priv, skb, wc->byte_len);
+
+ skb_pull(skb, IB_GRH_BYTES);
+
+ skb->protocol = ((struct ipoib_header *) skb->data)->proto;
+ skb_reset_mac_header(skb);
+ skb_pull(skb, IPOIB_ENCAP_LEN);
+
+ ++dev->stats.rx_packets;
+ dev->stats.rx_bytes += skb->len;
+
+ skb->dev = dev;
+ /* XXX get correct PACKET_ type here */
+ skb->pkt_type = PACKET_HOST;
+
+ if (test_bit(IPOIB_FLAG_CSUM, &priv->flags) && likely(wc->csum_ok))
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+
+ if (dev->features & NETIF_F_LRO)
+ lro_receive_skb(&priv->lro.lro_mgr, skb, NULL);
+ else
+ netif_receive_skb(skb);
+
+repost:
+ if (unlikely(ipoib_ib_post_receive(dev, wr_id)))
+ ipoib_warn(priv, "ipoib_ib_post_receive failed "
+ "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;
+ int off;
+
+ if (skb_headlen(skb)) {
+ 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;
+
+ off = 1;
+ } else
+ off = 0;
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) {
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+ mapping[i + off] = ib_dma_map_page(ca, frag->page,
+ frag->page_offset, frag->size,
+ DMA_TO_DEVICE);
+ if (unlikely(ib_dma_mapping_error(ca, mapping[i + off])))
+ goto partial_error;
+ }
+ return 0;
+
+partial_error:
+ for (; i > 0; --i) {
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
+ ib_dma_unmap_page(ca, mapping[i - !off], frag->size, DMA_TO_DEVICE);
+ }
+
+ if (off)
+ ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), 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;
+ int off;
+
+ if (skb_headlen(skb)) {
+ ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE);
+ off = 1;
+ } else
+ off = 0;
+
+ 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 + off], 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);
unsigned int wr_id = wc->wr_id;
+ struct ipoib_tx_buf *tx_req;
- ipoib_dbg_data(priv, "called: id %d, op %d, status: %d\n",
- wr_id, wc->opcode, wc->status);
+ ipoib_dbg_data(priv, "send completion: id %d, status: %d\n",
+ wr_id, wc->status);
- if (wr_id & IPOIB_OP_RECV) {
- wr_id &= ~IPOIB_OP_RECV;
+ if (unlikely(wr_id >= ipoib_sendq_size)) {
+ ipoib_warn(priv, "send completion event with wrid %d (> %d)\n",
+ wr_id, ipoib_sendq_size);
+ return;
+ }
- if (wr_id < IPOIB_RX_RING_SIZE) {
- struct sk_buff *skb = priv->rx_ring[wr_id].skb;
+ tx_req = &priv->tx_ring[wr_id];
- priv->rx_ring[wr_id].skb = NULL;
+ ipoib_dma_unmap_tx(priv->ca, tx_req);
- dma_unmap_single(priv->ca->dma_device,
- pci_unmap_addr(&priv->rx_ring[wr_id],
- mapping),
- IPOIB_BUF_SIZE,
- DMA_FROM_DEVICE);
+ ++dev->stats.tx_packets;
+ dev->stats.tx_bytes += tx_req->skb->len;
- if (wc->status != IB_WC_SUCCESS) {
- if (wc->status != IB_WC_WR_FLUSH_ERR)
- ipoib_warn(priv, "failed recv event "
- "(status=%d, wrid=%d vend_err %x)\n",
- wc->status, wr_id, wc->vendor_err);
- dev_kfree_skb_any(skb);
- return;
- }
+ dev_kfree_skb_any(tx_req->skb);
- ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n",
- wc->byte_len, wc->slid);
-
- skb_put(skb, wc->byte_len);
- skb_pull(skb, IB_GRH_BYTES);
-
- if (wc->slid != priv->local_lid ||
- wc->src_qp != priv->qp->qp_num) {
- skb->protocol = ((struct ipoib_header *) skb->data)->proto;
- skb->mac.raw = skb->data;
- skb_pull(skb, IPOIB_ENCAP_LEN);
-
- dev->last_rx = jiffies;
- ++priv->stats.rx_packets;
- priv->stats.rx_bytes += skb->len;
-
- skb->dev = dev;
- /* XXX get correct PACKET_ type here */
- skb->pkt_type = PACKET_HOST;
- netif_rx_ni(skb);
- } else {
- ipoib_dbg_data(priv, "dropping loopback packet\n");
- dev_kfree_skb_any(skb);
- }
+ ++priv->tx_tail;
+ if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) &&
+ netif_queue_stopped(dev) &&
+ test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
+ netif_wake_queue(dev);
- /* repost receive */
- if (ipoib_ib_post_receive(dev, wr_id))
- ipoib_warn(priv, "ipoib_ib_post_receive failed "
- "for buf %d\n", wr_id);
- } else
- ipoib_warn(priv, "completion event with wrid %d\n",
- wr_id);
+ if (wc->status != IB_WC_SUCCESS &&
+ wc->status != IB_WC_WR_FLUSH_ERR)
+ ipoib_warn(priv, "failed send event "
+ "(status=%d, wrid=%d vend_err %x)\n",
+ wc->status, wr_id, wc->vendor_err);
+}
- } else {
- struct ipoib_buf *tx_req;
- unsigned long flags;
+static int poll_tx(struct ipoib_dev_priv *priv)
+{
+ int n, i;
- if (wr_id >= IPOIB_TX_RING_SIZE) {
- ipoib_warn(priv, "completion event with wrid %d (> %d)\n",
- wr_id, IPOIB_TX_RING_SIZE);
- return;
- }
+ n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc);
+ for (i = 0; i < n; ++i)
+ ipoib_ib_handle_tx_wc(priv->dev, priv->send_wc + i);
- ipoib_dbg_data(priv, "send complete, wrid %d\n", wr_id);
+ return n == MAX_SEND_CQE;
+}
- tx_req = &priv->tx_ring[wr_id];
+int ipoib_poll(struct napi_struct *napi, int budget)
+{
+ struct ipoib_dev_priv *priv = container_of(napi, struct ipoib_dev_priv, napi);
+ struct net_device *dev = priv->dev;
+ int done;
+ int t;
+ int n, i;
- dma_unmap_single(priv->ca->dma_device,
- pci_unmap_addr(tx_req, mapping),
- tx_req->skb->len,
- DMA_TO_DEVICE);
+ done = 0;
- ++priv->stats.tx_packets;
- priv->stats.tx_bytes += tx_req->skb->len;
+poll_more:
+ while (done < budget) {
+ int max = (budget - done);
- dev_kfree_skb_any(tx_req->skb);
+ t = min(IPOIB_NUM_WC, max);
+ n = ib_poll_cq(priv->recv_cq, t, priv->ibwc);
- spin_lock_irqsave(&priv->tx_lock, flags);
- ++priv->tx_tail;
- if (netif_queue_stopped(dev) &&
- priv->tx_head - priv->tx_tail <= IPOIB_TX_RING_SIZE / 2)
- netif_wake_queue(dev);
- spin_unlock_irqrestore(&priv->tx_lock, flags);
+ for (i = 0; i < n; i++) {
+ struct ib_wc *wc = priv->ibwc + i;
- if (wc->status != IB_WC_SUCCESS &&
- wc->status != IB_WC_WR_FLUSH_ERR)
- ipoib_warn(priv, "failed send event "
- "(status=%d, wrid=%d vend_err %x)\n",
- wc->status, wr_id, wc->vendor_err);
+ if (wc->wr_id & IPOIB_OP_RECV) {
+ ++done;
+ if (wc->wr_id & IPOIB_OP_CM)
+ ipoib_cm_handle_rx_wc(dev, wc);
+ else
+ ipoib_ib_handle_rx_wc(dev, wc);
+ } else
+ ipoib_cm_handle_tx_wc(priv->dev, wc);
+ }
+
+ if (n != t)
+ break;
+ }
+
+ if (done < budget) {
+ if (dev->features & NETIF_F_LRO)
+ lro_flush_all(&priv->lro.lro_mgr);
+
+ napi_complete(napi);
+ if (unlikely(ib_req_notify_cq(priv->recv_cq,
+ IB_CQ_NEXT_COMP |
+ IB_CQ_REPORT_MISSED_EVENTS)) &&
+ napi_reschedule(napi))
+ goto poll_more;
}
+
+ return done;
}
void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr)
{
- struct net_device *dev = (struct net_device *) dev_ptr;
+ struct net_device *dev = dev_ptr;
struct ipoib_dev_priv *priv = netdev_priv(dev);
- int n, i;
- ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
- do {
- n = ib_poll_cq(cq, IPOIB_NUM_WC, priv->ibwc);
- for (i = 0; i < n; ++i)
- ipoib_ib_handle_wc(dev, priv->ibwc + i);
- } while (n == IPOIB_NUM_WC);
+ napi_schedule(&priv->napi);
+}
+
+static void drain_tx_cq(struct net_device *dev)
+{
+ struct ipoib_dev_priv *priv = netdev_priv(dev);
+
+ netif_tx_lock(dev);
+ while (poll_tx(priv))
+ ; /* nothing */
+
+ if (netif_queue_stopped(dev))
+ mod_timer(&priv->poll_timer, jiffies + 1);
+
+ netif_tx_unlock(dev);
+}
+
+void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr)
+{
+ struct ipoib_dev_priv *priv = netdev_priv(dev_ptr);
+
+ mod_timer(&priv->poll_timer, jiffies);
}
static inline int post_send(struct ipoib_dev_priv *priv,
unsigned int wr_id,
struct ib_ah *address, u32 qpn,
- dma_addr_t addr, int len)
+ struct ipoib_tx_buf *tx_req,
+ void *head, int hlen)
{
struct ib_send_wr *bad_wr;
+ int i, off;
+ struct sk_buff *skb = tx_req->skb;
+ skb_frag_t *frags = skb_shinfo(skb)->frags;
+ int nr_frags = skb_shinfo(skb)->nr_frags;
+ u64 *mapping = tx_req->mapping;
+
+ if (skb_headlen(skb)) {
+ priv->tx_sge[0].addr = mapping[0];
+ priv->tx_sge[0].length = skb_headlen(skb);
+ off = 1;
+ } else
+ off = 0;
- 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;
+ for (i = 0; i < nr_frags; ++i) {
+ priv->tx_sge[i + off].addr = mapping[i + off];
+ priv->tx_sge[i + off].length = frags[i].size;
+ }
+ priv->tx_wr.num_sge = nr_frags + off;
+ priv->tx_wr.wr_id = wr_id;
+ priv->tx_wr.wr.ud.remote_qpn = qpn;
+ priv->tx_wr.wr.ud.ah = address;
+
+ if (head) {
+ priv->tx_wr.wr.ud.mss = skb_shinfo(skb)->gso_size;
+ priv->tx_wr.wr.ud.header = head;
+ priv->tx_wr.wr.ud.hlen = hlen;
+ priv->tx_wr.opcode = IB_WR_LSO;
+ } else
+ priv->tx_wr.opcode = IB_WR_SEND;
return ib_post_send(priv->qp, &priv->tx_wr, &bad_wr);
}
struct ipoib_ah *address, u32 qpn)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
- struct ipoib_buf *tx_req;
- dma_addr_t addr;
-
- if (skb->len > dev->mtu + INFINIBAND_ALEN) {
- ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n",
- skb->len, dev->mtu + INFINIBAND_ALEN);
- ++priv->stats.tx_dropped;
- ++priv->stats.tx_errors;
- dev_kfree_skb_any(skb);
- return;
+ struct ipoib_tx_buf *tx_req;
+ int hlen, rc;
+ void *phead;
+
+ if (skb_is_gso(skb)) {
+ hlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
+ phead = skb->data;
+ if (unlikely(!skb_pull(skb, hlen))) {
+ ipoib_warn(priv, "linear data too small\n");
+ ++dev->stats.tx_dropped;
+ ++dev->stats.tx_errors;
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ } else {
+ if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) {
+ ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n",
+ skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN);
+ ++dev->stats.tx_dropped;
+ ++dev->stats.tx_errors;
+ ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu);
+ return;
+ }
+ phead = NULL;
+ hlen = 0;
}
ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n",
* means we have to make sure everything is properly recorded and
* our state is consistent before we call post_send().
*/
- tx_req = &priv->tx_ring[priv->tx_head & (IPOIB_TX_RING_SIZE - 1)];
+ tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)];
tx_req->skb = skb;
- addr = dma_map_single(priv->ca->dma_device, skb->data, skb->len,
- DMA_TO_DEVICE);
- pci_unmap_addr_set(tx_req, mapping, addr);
-
- if (unlikely(post_send(priv, priv->tx_head & (IPOIB_TX_RING_SIZE - 1),
- address->ah, qpn, addr, skb->len))) {
- ipoib_warn(priv, "post_send failed\n");
- ++priv->stats.tx_errors;
- dma_unmap_single(priv->ca->dma_device, addr, skb->len,
- DMA_TO_DEVICE);
+ if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) {
+ ++dev->stats.tx_errors;
+ dev_kfree_skb_any(skb);
+ return;
+ }
+
+ if (skb->ip_summed == CHECKSUM_PARTIAL)
+ priv->tx_wr.send_flags |= IB_SEND_IP_CSUM;
+ else
+ priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM;
+
+ if (++priv->tx_outstanding == ipoib_sendq_size) {
+ ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n");
+ if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP))
+ ipoib_warn(priv, "request notify on send CQ failed\n");
+ netif_stop_queue(dev);
+ }
+
+ rc = post_send(priv, priv->tx_head & (ipoib_sendq_size - 1),
+ address->ah, qpn, tx_req, phead, hlen);
+ if (unlikely(rc)) {
+ ipoib_warn(priv, "post_send failed, error %d\n", rc);
+ ++dev->stats.tx_errors;
+ --priv->tx_outstanding;
+ ipoib_dma_unmap_tx(priv->ca, tx_req);
dev_kfree_skb_any(skb);
+ if (netif_queue_stopped(dev))
+ netif_wake_queue(dev);
} else {
dev->trans_start = jiffies;
address->last_send = priv->tx_head;
++priv->tx_head;
+ skb_orphan(skb);
- if (priv->tx_head - priv->tx_tail == IPOIB_TX_RING_SIZE) {
- ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n");
- netif_stop_queue(dev);
- }
}
+
+ if (unlikely(priv->tx_outstanding > MAX_SEND_CQE))
+ while (poll_tx(priv))
+ ; /* nothing */
}
static void __ipoib_reap_ah(struct net_device *dev)
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_ah *ah, *tah;
LIST_HEAD(remove_list);
+ unsigned long flags;
+
+ netif_tx_lock_bh(dev);
+ spin_lock_irqsave(&priv->lock, flags);
- spin_lock_irq(&priv->lock);
list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list)
- if (ah->last_send <= priv->tx_tail) {
+ if ((int) priv->tx_tail - (int) ah->last_send >= 0) {
list_del(&ah->list);
- list_add_tail(&ah->list, &remove_list);
+ ib_destroy_ah(ah->ah);
+ kfree(ah);
}
- spin_unlock_irq(&priv->lock);
- list_for_each_entry_safe(ah, tah, &remove_list, list) {
- ipoib_dbg(priv, "Reaping ah %p\n", ah->ah);
- ib_destroy_ah(ah->ah);
- kfree(ah);
- }
+ spin_unlock_irqrestore(&priv->lock, flags);
+ netif_tx_unlock_bh(dev);
}
-void ipoib_reap_ah(void *dev_ptr)
+void ipoib_reap_ah(struct work_struct *work)
{
- struct net_device *dev = dev_ptr;
- struct ipoib_dev_priv *priv = netdev_priv(dev);
+ struct ipoib_dev_priv *priv =
+ container_of(work, struct ipoib_dev_priv, ah_reap_task.work);
+ struct net_device *dev = priv->dev;
__ipoib_reap_ah(dev);
if (!test_bit(IPOIB_STOP_REAPER, &priv->flags))
- queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ);
+ queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task,
+ round_jiffies_relative(HZ));
+}
+
+static void ipoib_ib_tx_timer_func(unsigned long ctx)
+{
+ drain_tx_cq((struct net_device *)ctx);
}
int ipoib_ib_dev_open(struct net_device *dev)
struct ipoib_dev_priv *priv = netdev_priv(dev);
int ret;
- ret = ipoib_qp_create(dev);
+ if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &priv->pkey_index)) {
+ ipoib_warn(priv, "P_Key 0x%04x not found\n", priv->pkey);
+ clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
+ return -1;
+ }
+ set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
+
+ ret = ipoib_init_qp(dev);
if (ret) {
- ipoib_warn(priv, "ipoib_qp_create returned %d\n", ret);
+ ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret);
return -1;
}
ret = ipoib_ib_post_receives(dev);
if (ret) {
ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret);
+ ipoib_ib_dev_stop(dev, 1);
+ return -1;
+ }
+
+ ret = ipoib_cm_dev_open(dev);
+ if (ret) {
+ ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret);
+ ipoib_ib_dev_stop(dev, 1);
return -1;
}
clear_bit(IPOIB_STOP_REAPER, &priv->flags);
- queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ);
+ queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task,
+ round_jiffies_relative(HZ));
+
+ if (!test_and_set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
+ napi_enable(&priv->napi);
return 0;
}
+static void ipoib_pkey_dev_check_presence(struct net_device *dev)
+{
+ struct ipoib_dev_priv *priv = netdev_priv(dev);
+ u16 pkey_index = 0;
+
+ if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index))
+ clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
+ else
+ set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
+}
+
int ipoib_ib_dev_up(struct net_device *dev)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
+ ipoib_pkey_dev_check_presence(dev);
+
+ if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
+ ipoib_dbg(priv, "PKEY is not assigned.\n");
+ return 0;
+ }
+
set_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
return ipoib_mcast_start_thread(dev);
}
-int ipoib_ib_dev_down(struct net_device *dev)
+int ipoib_ib_dev_down(struct net_device *dev, int flush)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
/* Shutdown the P_Key thread if still active */
if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
- down(&pkey_sem);
+ mutex_lock(&pkey_mutex);
set_bit(IPOIB_PKEY_STOP, &priv->flags);
- cancel_delayed_work(&priv->pkey_task);
- up(&pkey_sem);
- flush_workqueue(ipoib_workqueue);
+ cancel_delayed_work(&priv->pkey_poll_task);
+ mutex_unlock(&pkey_mutex);
+ if (flush)
+ flush_workqueue(ipoib_workqueue);
}
- ipoib_mcast_stop_thread(dev);
-
- /*
- * Flush the multicast groups first so we stop any multicast joins. The
- * completion thread may have already died and we may deadlock waiting
- * for the completion thread to finish some multicast joins.
- */
+ ipoib_mcast_stop_thread(dev, flush);
ipoib_mcast_dev_flush(dev);
- /* Delete broadcast and local addresses since they will be recreated */
- ipoib_mcast_dev_down(dev);
-
ipoib_flush_paths(dev);
return 0;
int pending = 0;
int i;
- for (i = 0; i < IPOIB_RX_RING_SIZE; ++i)
+ for (i = 0; i < ipoib_recvq_size; ++i)
if (priv->rx_ring[i].skb)
++pending;
return pending;
}
-int ipoib_ib_dev_stop(struct net_device *dev)
+void ipoib_drain_cq(struct net_device *dev)
+{
+ struct ipoib_dev_priv *priv = netdev_priv(dev);
+ int i, n;
+
+ /*
+ * We call completion handling routines that expect to be
+ * called from the BH-disabled NAPI poll context, so disable
+ * BHs here too.
+ */
+ local_bh_disable();
+
+ do {
+ n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc);
+ for (i = 0; i < n; ++i) {
+ /*
+ * Convert any successful completions to flush
+ * errors to avoid passing packets up the
+ * stack after bringing the device down.
+ */
+ if (priv->ibwc[i].status == IB_WC_SUCCESS)
+ priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR;
+
+ if (priv->ibwc[i].wr_id & IPOIB_OP_RECV) {
+ if (priv->ibwc[i].wr_id & IPOIB_OP_CM)
+ ipoib_cm_handle_rx_wc(dev, priv->ibwc + i);
+ else
+ ipoib_ib_handle_rx_wc(dev, priv->ibwc + i);
+ } else
+ ipoib_cm_handle_tx_wc(dev, priv->ibwc + i);
+ }
+ } while (n == IPOIB_NUM_WC);
+
+ while (poll_tx(priv))
+ ; /* nothing */
+
+ local_bh_enable();
+}
+
+int ipoib_ib_dev_stop(struct net_device *dev, int flush)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ib_qp_attr qp_attr;
- int attr_mask;
unsigned long begin;
- struct ipoib_buf *tx_req;
+ struct ipoib_tx_buf *tx_req;
int i;
- /* Kill the existing QP and allocate a new one */
+ if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
+ napi_disable(&priv->napi);
+
+ ipoib_cm_dev_stop(dev);
+
+ /*
+ * Move our QP to the error state and then reinitialize in
+ * when all work requests have completed or have been flushed.
+ */
qp_attr.qp_state = IB_QPS_ERR;
- attr_mask = IB_QP_STATE;
- if (ib_modify_qp(priv->qp, &qp_attr, attr_mask))
+ if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
ipoib_warn(priv, "Failed to modify QP to ERROR state\n");
/* Wait for all sends and receives to complete */
* assume the HW is wedged and just free up
* all our pending work requests.
*/
- while (priv->tx_tail < priv->tx_head) {
+ while ((int) priv->tx_tail - (int) priv->tx_head < 0) {
tx_req = &priv->tx_ring[priv->tx_tail &
- (IPOIB_TX_RING_SIZE - 1)];
- dma_unmap_single(priv->ca->dma_device,
- pci_unmap_addr(tx_req, mapping),
- tx_req->skb->len,
- DMA_TO_DEVICE);
+ (ipoib_sendq_size - 1)];
+ ipoib_dma_unmap_tx(priv->ca, tx_req);
dev_kfree_skb_any(tx_req->skb);
++priv->tx_tail;
+ --priv->tx_outstanding;
}
- for (i = 0; i < IPOIB_RX_RING_SIZE; ++i)
- if (priv->rx_ring[i].skb) {
- dma_unmap_single(priv->ca->dma_device,
- pci_unmap_addr(&priv->rx_ring[i],
- mapping),
- IPOIB_BUF_SIZE,
- DMA_FROM_DEVICE);
- dev_kfree_skb_any(priv->rx_ring[i].skb);
- priv->rx_ring[i].skb = NULL;
- }
+ for (i = 0; i < ipoib_recvq_size; ++i) {
+ struct ipoib_rx_buf *rx_req;
+
+ rx_req = &priv->rx_ring[i];
+ if (!rx_req->skb)
+ continue;
+ ipoib_ud_dma_unmap_rx(priv,
+ priv->rx_ring[i].mapping);
+ dev_kfree_skb_any(rx_req->skb);
+ rx_req->skb = NULL;
+ }
goto timeout;
}
+ ipoib_drain_cq(dev);
+
msleep(1);
}
ipoib_dbg(priv, "All sends and receives done.\n");
timeout:
+ del_timer_sync(&priv->poll_timer);
qp_attr.qp_state = IB_QPS_RESET;
- attr_mask = IB_QP_STATE;
- if (ib_modify_qp(priv->qp, &qp_attr, attr_mask))
+ if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
ipoib_warn(priv, "Failed to modify QP to RESET state\n");
/* Wait for all AHs to be reaped */
set_bit(IPOIB_STOP_REAPER, &priv->flags);
cancel_delayed_work(&priv->ah_reap_task);
- flush_workqueue(ipoib_workqueue);
+ if (flush)
+ flush_workqueue(ipoib_workqueue);
begin = jiffies;
msleep(1);
}
+ ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP);
+
return 0;
}
return -ENODEV;
}
+ setup_timer(&priv->poll_timer, ipoib_ib_tx_timer_func,
+ (unsigned long) dev);
+
if (dev->flags & IFF_UP) {
if (ipoib_ib_dev_open(dev)) {
ipoib_transport_dev_cleanup(dev);
return 0;
}
-void ipoib_ib_dev_flush(void *_dev)
+static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv,
+ enum ipoib_flush_level level)
{
- struct net_device *dev = (struct net_device *)_dev;
- struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv;
+ struct ipoib_dev_priv *cpriv;
+ struct net_device *dev = priv->dev;
+ u16 new_index;
+
+ mutex_lock(&priv->vlan_mutex);
+
+ /*
+ * Flush any child interfaces too -- they might be up even if
+ * the parent is down.
+ */
+ list_for_each_entry(cpriv, &priv->child_intfs, list)
+ __ipoib_ib_dev_flush(cpriv, level);
+
+ mutex_unlock(&priv->vlan_mutex);
- if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
+ if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) {
+ ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n");
return;
+ }
+
+ if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
+ ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n");
+ return;
+ }
+
+ if (level == IPOIB_FLUSH_HEAVY) {
+ if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &new_index)) {
+ clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
+ ipoib_ib_dev_down(dev, 0);
+ ipoib_ib_dev_stop(dev, 0);
+ if (ipoib_pkey_dev_delay_open(dev))
+ return;
+ }
+
+ /* restart QP only if P_Key index is changed */
+ if (test_and_set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) &&
+ new_index == priv->pkey_index) {
+ ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n");
+ return;
+ }
+ priv->pkey_index = new_index;
+ }
- ipoib_dbg(priv, "flushing\n");
+ if (level == IPOIB_FLUSH_LIGHT) {
+ ipoib_mark_paths_invalid(dev);
+ ipoib_mcast_dev_flush(dev);
+ }
- ipoib_ib_dev_down(dev);
+ if (level >= IPOIB_FLUSH_NORMAL)
+ ipoib_ib_dev_down(dev, 0);
+
+ if (level == IPOIB_FLUSH_HEAVY) {
+ ipoib_ib_dev_stop(dev, 0);
+ ipoib_ib_dev_open(dev);
+ }
/*
* The device could have been brought down between the start and when
* we get here, don't bring it back up if it's not configured up
*/
- if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
- ipoib_ib_dev_up(dev);
+ if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
+ if (level >= IPOIB_FLUSH_NORMAL)
+ ipoib_ib_dev_up(dev);
+ ipoib_mcast_restart_task(&priv->restart_task);
+ }
+}
- /* Flush any child interfaces too */
- list_for_each_entry(cpriv, &priv->child_intfs, list)
- ipoib_ib_dev_flush(&cpriv->dev);
+void ipoib_ib_dev_flush_light(struct work_struct *work)
+{
+ struct ipoib_dev_priv *priv =
+ container_of(work, struct ipoib_dev_priv, flush_light);
+
+ __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT);
+}
+
+void ipoib_ib_dev_flush_normal(struct work_struct *work)
+{
+ struct ipoib_dev_priv *priv =
+ container_of(work, struct ipoib_dev_priv, flush_normal);
+
+ __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL);
+}
+
+void ipoib_ib_dev_flush_heavy(struct work_struct *work)
+{
+ struct ipoib_dev_priv *priv =
+ container_of(work, struct ipoib_dev_priv, flush_heavy);
+
+ __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY);
}
void ipoib_ib_dev_cleanup(struct net_device *dev)
ipoib_dbg(priv, "cleaning up ib_dev\n");
- ipoib_mcast_stop_thread(dev);
-
- /* Delete the broadcast address and the local address */
- ipoib_mcast_dev_down(dev);
+ ipoib_mcast_stop_thread(dev, 1);
+ ipoib_mcast_dev_flush(dev);
ipoib_transport_dev_cleanup(dev);
}
* Bug #2507. This implementation will probably be removed when the P_Key
* change async notification is available.
*/
-int ipoib_open(struct net_device *dev);
-
-static void ipoib_pkey_dev_check_presence(struct net_device *dev)
-{
- struct ipoib_dev_priv *priv = netdev_priv(dev);
- u16 pkey_index = 0;
-
- if (ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &pkey_index))
- clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
- else
- set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
-}
-void ipoib_pkey_poll(void *dev_ptr)
+void ipoib_pkey_poll(struct work_struct *work)
{
- struct net_device *dev = dev_ptr;
- struct ipoib_dev_priv *priv = netdev_priv(dev);
+ struct ipoib_dev_priv *priv =
+ container_of(work, struct ipoib_dev_priv, pkey_poll_task.work);
+ struct net_device *dev = priv->dev;
ipoib_pkey_dev_check_presence(dev);
if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
ipoib_open(dev);
else {
- down(&pkey_sem);
+ mutex_lock(&pkey_mutex);
if (!test_bit(IPOIB_PKEY_STOP, &priv->flags))
queue_delayed_work(ipoib_workqueue,
- &priv->pkey_task,
+ &priv->pkey_poll_task,
HZ);
- up(&pkey_sem);
+ mutex_unlock(&pkey_mutex);
}
}
/* P_Key value not assigned yet - start polling */
if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
- down(&pkey_sem);
+ mutex_lock(&pkey_mutex);
clear_bit(IPOIB_PKEY_STOP, &priv->flags);
queue_delayed_work(ipoib_workqueue,
- &priv->pkey_task,
+ &priv->pkey_poll_task,
HZ);
- up(&pkey_sem);
+ mutex_unlock(&pkey_mutex);
return 1;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff