forked from Minki/linux
[PATCH] IB: Implementation for RMPP support in user MAD
Implementation for RMPP support in user MAD Signed-off-by: Hal Rosenstock <halr@voltaire.com> Cc: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Hal Rosenstock
Linus Torvalds
parent
3f75daddb4
commit
cb183a06b3
@ -1,5 +1,7 @@
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/*
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* Copyright (c) 2004 Topspin Communications. All rights reserved.
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* Copyright (c) 2005 Voltaire, Inc. All rights reserved.
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* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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@ -29,7 +31,7 @@
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* $Id: user_mad.c 1389 2004-12-27 22:56:47Z roland $
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* $Id: user_mad.c 2814 2005-07-06 19:14:09Z halr $
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*/
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#include <linux/module.h>
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@ -94,10 +96,12 @@ struct ib_umad_file {
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};
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struct ib_umad_packet {
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struct ib_user_mad mad;
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struct ib_ah *ah;
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struct ib_mad_send_buf *msg;
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struct list_head list;
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int length;
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DECLARE_PCI_UNMAP_ADDR(mapping)
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struct ib_user_mad mad;
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};
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static const dev_t base_dev = MKDEV(IB_UMAD_MAJOR, IB_UMAD_MINOR_BASE);
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@ -114,10 +118,10 @@ static int queue_packet(struct ib_umad_file *file,
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int ret = 1;
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down_read(&file->agent_mutex);
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for (packet->mad.id = 0;
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packet->mad.id < IB_UMAD_MAX_AGENTS;
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packet->mad.id++)
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if (agent == file->agent[packet->mad.id]) {
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for (packet->mad.hdr.id = 0;
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packet->mad.hdr.id < IB_UMAD_MAX_AGENTS;
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packet->mad.hdr.id++)
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if (agent == file->agent[packet->mad.hdr.id]) {
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spin_lock_irq(&file->recv_lock);
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list_add_tail(&packet->list, &file->recv_list);
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spin_unlock_irq(&file->recv_lock);
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@ -135,22 +139,30 @@ static void send_handler(struct ib_mad_agent *agent,
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struct ib_mad_send_wc *send_wc)
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{
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struct ib_umad_file *file = agent->context;
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struct ib_umad_packet *packet =
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struct ib_umad_packet *timeout, *packet =
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(void *) (unsigned long) send_wc->wr_id;
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dma_unmap_single(agent->device->dma_device,
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pci_unmap_addr(packet, mapping),
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sizeof packet->mad.data,
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DMA_TO_DEVICE);
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ib_destroy_ah(packet->ah);
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ib_destroy_ah(packet->msg->send_wr.wr.ud.ah);
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ib_free_send_mad(packet->msg);
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if (send_wc->status == IB_WC_RESP_TIMEOUT_ERR) {
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packet->mad.status = ETIMEDOUT;
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timeout = kmalloc(sizeof *timeout + sizeof (struct ib_mad_hdr),
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GFP_KERNEL);
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if (!timeout)
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goto out;
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if (!queue_packet(file, agent, packet))
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return;
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memset(timeout, 0, sizeof *timeout + sizeof (struct ib_mad_hdr));
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timeout->length = sizeof (struct ib_mad_hdr);
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timeout->mad.hdr.id = packet->mad.hdr.id;
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timeout->mad.hdr.status = ETIMEDOUT;
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memcpy(timeout->mad.data, packet->mad.data,
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sizeof (struct ib_mad_hdr));
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if (!queue_packet(file, agent, timeout))
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return;
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}
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out:
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kfree(packet);
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}
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@ -159,30 +171,35 @@ static void recv_handler(struct ib_mad_agent *agent,
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{
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struct ib_umad_file *file = agent->context;
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struct ib_umad_packet *packet;
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int length;
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if (mad_recv_wc->wc->status != IB_WC_SUCCESS)
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goto out;
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packet = kmalloc(sizeof *packet, GFP_KERNEL);
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length = mad_recv_wc->mad_len;
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packet = kmalloc(sizeof *packet + length, GFP_KERNEL);
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if (!packet)
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goto out;
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memset(packet, 0, sizeof *packet);
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memset(packet, 0, sizeof *packet + length);
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packet->length = length;
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memcpy(packet->mad.data, mad_recv_wc->recv_buf.mad, sizeof packet->mad.data);
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packet->mad.status = 0;
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packet->mad.qpn = cpu_to_be32(mad_recv_wc->wc->src_qp);
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packet->mad.lid = cpu_to_be16(mad_recv_wc->wc->slid);
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packet->mad.sl = mad_recv_wc->wc->sl;
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packet->mad.path_bits = mad_recv_wc->wc->dlid_path_bits;
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packet->mad.grh_present = !!(mad_recv_wc->wc->wc_flags & IB_WC_GRH);
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if (packet->mad.grh_present) {
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ib_coalesce_recv_mad(mad_recv_wc, packet->mad.data);
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packet->mad.hdr.status = 0;
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packet->mad.hdr.length = length + sizeof (struct ib_user_mad);
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packet->mad.hdr.qpn = cpu_to_be32(mad_recv_wc->wc->src_qp);
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packet->mad.hdr.lid = cpu_to_be16(mad_recv_wc->wc->slid);
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packet->mad.hdr.sl = mad_recv_wc->wc->sl;
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packet->mad.hdr.path_bits = mad_recv_wc->wc->dlid_path_bits;
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packet->mad.hdr.grh_present = !!(mad_recv_wc->wc->wc_flags & IB_WC_GRH);
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if (packet->mad.hdr.grh_present) {
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/* XXX parse GRH */
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packet->mad.gid_index = 0;
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packet->mad.hop_limit = 0;
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packet->mad.traffic_class = 0;
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memset(packet->mad.gid, 0, 16);
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packet->mad.flow_label = 0;
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packet->mad.hdr.gid_index = 0;
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packet->mad.hdr.hop_limit = 0;
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packet->mad.hdr.traffic_class = 0;
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memset(packet->mad.hdr.gid, 0, 16);
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packet->mad.hdr.flow_label = 0;
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}
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if (queue_packet(file, agent, packet))
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@ -199,7 +216,7 @@ static ssize_t ib_umad_read(struct file *filp, char __user *buf,
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struct ib_umad_packet *packet;
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ssize_t ret;
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if (count < sizeof (struct ib_user_mad))
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if (count < sizeof (struct ib_user_mad) + sizeof (struct ib_mad))
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return -EINVAL;
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spin_lock_irq(&file->recv_lock);
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@ -222,12 +239,25 @@ static ssize_t ib_umad_read(struct file *filp, char __user *buf,
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spin_unlock_irq(&file->recv_lock);
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if (copy_to_user(buf, &packet->mad, sizeof packet->mad))
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if (count < packet->length + sizeof (struct ib_user_mad)) {
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/* Return length needed (and first RMPP segment) if too small */
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if (copy_to_user(buf, &packet->mad,
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sizeof (struct ib_user_mad) + sizeof (struct ib_mad)))
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ret = -EFAULT;
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else
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ret = -ENOSPC;
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} else if (copy_to_user(buf, &packet->mad,
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packet->length + sizeof (struct ib_user_mad)))
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ret = -EFAULT;
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else
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ret = sizeof packet->mad;
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kfree(packet);
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ret = packet->length + sizeof (struct ib_user_mad);
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if (ret < 0) {
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/* Requeue packet */
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spin_lock_irq(&file->recv_lock);
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list_add(&packet->list, &file->recv_list);
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spin_unlock_irq(&file->recv_lock);
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} else
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kfree(packet);
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return ret;
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}
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@ -238,69 +268,57 @@ static ssize_t ib_umad_write(struct file *filp, const char __user *buf,
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struct ib_umad_packet *packet;
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struct ib_mad_agent *agent;
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struct ib_ah_attr ah_attr;
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struct ib_sge gather_list;
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struct ib_send_wr *bad_wr, wr = {
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.opcode = IB_WR_SEND,
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.sg_list = &gather_list,
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.num_sge = 1,
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.send_flags = IB_SEND_SIGNALED,
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};
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struct ib_send_wr *bad_wr;
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struct ib_rmpp_mad *rmpp_mad;
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u8 method;
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u64 *tid;
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int ret;
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int ret, length, hdr_len, data_len, rmpp_hdr_size;
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int rmpp_active = 0;
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if (count < sizeof (struct ib_user_mad))
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return -EINVAL;
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packet = kmalloc(sizeof *packet, GFP_KERNEL);
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length = count - sizeof (struct ib_user_mad);
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packet = kmalloc(sizeof *packet + sizeof(struct ib_mad_hdr) +
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sizeof(struct ib_rmpp_hdr), GFP_KERNEL);
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if (!packet)
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return -ENOMEM;
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if (copy_from_user(&packet->mad, buf, sizeof packet->mad)) {
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kfree(packet);
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return -EFAULT;
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if (copy_from_user(&packet->mad, buf,
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sizeof (struct ib_user_mad) +
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sizeof(struct ib_mad_hdr) +
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sizeof(struct ib_rmpp_hdr))) {
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ret = -EFAULT;
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goto err;
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}
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if (packet->mad.id < 0 || packet->mad.id >= IB_UMAD_MAX_AGENTS) {
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if (packet->mad.hdr.id < 0 ||
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packet->mad.hdr.id >= IB_UMAD_MAX_AGENTS) {
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ret = -EINVAL;
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goto err;
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}
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packet->length = length;
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down_read(&file->agent_mutex);
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agent = file->agent[packet->mad.id];
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agent = file->agent[packet->mad.hdr.id];
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if (!agent) {
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ret = -EINVAL;
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goto err_up;
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}
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/*
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* If userspace is generating a request that will generate a
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* response, we need to make sure the high-order part of the
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* transaction ID matches the agent being used to send the
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* MAD.
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*/
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method = ((struct ib_mad_hdr *) packet->mad.data)->method;
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if (!(method & IB_MGMT_METHOD_RESP) &&
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method != IB_MGMT_METHOD_TRAP_REPRESS &&
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method != IB_MGMT_METHOD_SEND) {
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tid = &((struct ib_mad_hdr *) packet->mad.data)->tid;
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*tid = cpu_to_be64(((u64) agent->hi_tid) << 32 |
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(be64_to_cpup(tid) & 0xffffffff));
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}
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memset(&ah_attr, 0, sizeof ah_attr);
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ah_attr.dlid = be16_to_cpu(packet->mad.lid);
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ah_attr.sl = packet->mad.sl;
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ah_attr.src_path_bits = packet->mad.path_bits;
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ah_attr.dlid = be16_to_cpu(packet->mad.hdr.lid);
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ah_attr.sl = packet->mad.hdr.sl;
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ah_attr.src_path_bits = packet->mad.hdr.path_bits;
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ah_attr.port_num = file->port->port_num;
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if (packet->mad.grh_present) {
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if (packet->mad.hdr.grh_present) {
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ah_attr.ah_flags = IB_AH_GRH;
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memcpy(ah_attr.grh.dgid.raw, packet->mad.gid, 16);
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ah_attr.grh.flow_label = packet->mad.flow_label;
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ah_attr.grh.hop_limit = packet->mad.hop_limit;
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ah_attr.grh.traffic_class = packet->mad.traffic_class;
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memcpy(ah_attr.grh.dgid.raw, packet->mad.hdr.gid, 16);
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ah_attr.grh.flow_label = packet->mad.hdr.flow_label;
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ah_attr.grh.hop_limit = packet->mad.hdr.hop_limit;
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ah_attr.grh.traffic_class = packet->mad.hdr.traffic_class;
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}
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packet->ah = ib_create_ah(agent->qp->pd, &ah_attr);
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@ -309,35 +327,104 @@ static ssize_t ib_umad_write(struct file *filp, const char __user *buf,
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goto err_up;
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}
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gather_list.addr = dma_map_single(agent->device->dma_device,
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packet->mad.data,
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sizeof packet->mad.data,
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DMA_TO_DEVICE);
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gather_list.length = sizeof packet->mad.data;
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gather_list.lkey = file->mr[packet->mad.id]->lkey;
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pci_unmap_addr_set(packet, mapping, gather_list.addr);
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wr.wr.ud.mad_hdr = (struct ib_mad_hdr *) packet->mad.data;
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wr.wr.ud.ah = packet->ah;
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wr.wr.ud.remote_qpn = be32_to_cpu(packet->mad.qpn);
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wr.wr.ud.remote_qkey = be32_to_cpu(packet->mad.qkey);
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wr.wr.ud.timeout_ms = packet->mad.timeout_ms;
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wr.wr.ud.retries = 0;
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wr.wr_id = (unsigned long) packet;
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ret = ib_post_send_mad(agent, &wr, &bad_wr);
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if (ret) {
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dma_unmap_single(agent->device->dma_device,
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pci_unmap_addr(packet, mapping),
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sizeof packet->mad.data,
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DMA_TO_DEVICE);
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goto err_up;
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rmpp_mad = (struct ib_rmpp_mad *) packet->mad.data;
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if (ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & IB_MGMT_RMPP_FLAG_ACTIVE) {
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/* RMPP active */
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if (!agent->rmpp_version) {
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ret = -EINVAL;
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goto err_ah;
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}
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/* Validate that management class can support RMPP */
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if (rmpp_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_ADM) {
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hdr_len = offsetof(struct ib_sa_mad, data);
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data_len = length;
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} else if ((rmpp_mad->mad_hdr.mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) &&
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(rmpp_mad->mad_hdr.mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)) {
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hdr_len = offsetof(struct ib_vendor_mad, data);
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data_len = length - hdr_len;
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} else {
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ret = -EINVAL;
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goto err_ah;
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}
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rmpp_active = 1;
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} else {
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if (length > sizeof(struct ib_mad)) {
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ret = -EINVAL;
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goto err_ah;
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}
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hdr_len = offsetof(struct ib_mad, data);
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data_len = length - hdr_len;
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}
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packet->msg = ib_create_send_mad(agent,
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be32_to_cpu(packet->mad.hdr.qpn),
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0, packet->ah, rmpp_active,
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hdr_len, data_len,
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GFP_KERNEL);
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if (IS_ERR(packet->msg)) {
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ret = PTR_ERR(packet->msg);
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goto err_ah;
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}
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packet->msg->send_wr.wr.ud.timeout_ms = packet->mad.hdr.timeout_ms;
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packet->msg->send_wr.wr.ud.retries = packet->mad.hdr.retries;
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/* Override send WR WRID initialized in ib_create_send_mad */
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packet->msg->send_wr.wr_id = (unsigned long) packet;
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if (!rmpp_active) {
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/* Copy message from user into send buffer */
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if (copy_from_user(packet->msg->mad,
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buf + sizeof(struct ib_user_mad), length)) {
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ret = -EFAULT;
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goto err_msg;
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}
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} else {
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rmpp_hdr_size = sizeof(struct ib_mad_hdr) +
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sizeof(struct ib_rmpp_hdr);
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/* Only copy MAD headers (RMPP header in place) */
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memcpy(packet->msg->mad, packet->mad.data,
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sizeof(struct ib_mad_hdr));
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/* Now, copy rest of message from user into send buffer */
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if (copy_from_user(((struct ib_rmpp_mad *) packet->msg->mad)->data,
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buf + sizeof (struct ib_user_mad) + rmpp_hdr_size,
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length - rmpp_hdr_size)) {
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ret = -EFAULT;
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goto err_msg;
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}
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}
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|
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/*
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* If userspace is generating a request that will generate a
|
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* response, we need to make sure the high-order part of the
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* transaction ID matches the agent being used to send the
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* MAD.
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*/
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method = packet->msg->mad->mad_hdr.method;
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if (!(method & IB_MGMT_METHOD_RESP) &&
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method != IB_MGMT_METHOD_TRAP_REPRESS &&
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method != IB_MGMT_METHOD_SEND) {
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tid = &packet->msg->mad->mad_hdr.tid;
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*tid = cpu_to_be64(((u64) agent->hi_tid) << 32 |
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(be64_to_cpup(tid) & 0xffffffff));
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}
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ret = ib_post_send_mad(agent, &packet->msg->send_wr, &bad_wr);
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if (ret)
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goto err_msg;
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up_read(&file->agent_mutex);
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return sizeof packet->mad;
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return sizeof (struct ib_user_mad_hdr) + packet->length;
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err_msg:
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ib_free_send_mad(packet->msg);
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err_ah:
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ib_destroy_ah(packet->ah);
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err_up:
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up_read(&file->agent_mutex);
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@ -400,7 +487,8 @@ found:
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agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num,
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ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI,
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ureq.mgmt_class ? &req : NULL,
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0, send_handler, recv_handler, file);
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ureq.rmpp_version,
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send_handler, recv_handler, file);
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if (IS_ERR(agent)) {
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ret = PTR_ERR(agent);
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goto out;
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@ -461,8 +549,8 @@ out:
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return ret;
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}
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static long ib_umad_ioctl(struct file *filp,
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unsigned int cmd, unsigned long arg)
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static long ib_umad_ioctl(struct file *filp, unsigned int cmd,
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unsigned long arg)
|
||||
{
|
||||
switch (cmd) {
|
||||
case IB_USER_MAD_REGISTER_AGENT:
|
||||
@ -518,14 +606,14 @@ static int ib_umad_close(struct inode *inode, struct file *filp)
|
||||
}
|
||||
|
||||
static struct file_operations umad_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.read = ib_umad_read,
|
||||
.write = ib_umad_write,
|
||||
.poll = ib_umad_poll,
|
||||
.owner = THIS_MODULE,
|
||||
.read = ib_umad_read,
|
||||
.write = ib_umad_write,
|
||||
.poll = ib_umad_poll,
|
||||
.unlocked_ioctl = ib_umad_ioctl,
|
||||
.compat_ioctl = ib_umad_ioctl,
|
||||
.open = ib_umad_open,
|
||||
.release = ib_umad_close
|
||||
.compat_ioctl = ib_umad_ioctl,
|
||||
.open = ib_umad_open,
|
||||
.release = ib_umad_close
|
||||
};
|
||||
|
||||
static int ib_umad_sm_open(struct inode *inode, struct file *filp)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user