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[PATCH][v5][10/24] Add Mellanox HCA low-level driver (midlayer interface

To: davem@xxxxxxxxxxxxx
Subject: [PATCH][v5][10/24] Add Mellanox HCA low-level driver (midlayer interface)
From: Roland Dreier <roland@xxxxxxxxxxx>
Date: Mon, 27 Dec 2004 21:51:04 -0800
Cc: linux-kernel@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxx, openib-general@xxxxxxxxxx
In-reply-to: <200412272151.HKpCNDFOMg5KO6kB@xxxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
Add midlayer interface code for Mellanox HCA driver.

Signed-off-by: Roland Dreier <roland@xxxxxxxxxxx>


--- /dev/null   1970-01-01 00:00:00.000000000 +0000
+++ linux-bk/drivers/infiniband/hw/mthca/mthca_provider.c       2004-12-27 
21:48:22.043721469 -0800
@@ -0,0 +1,627 @@
+/*
+ * Copyright (c) 2004 Topspin Communications.  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
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * 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: mthca_provider.c 1397 2004-12-28 05:09:00Z roland $
+ */
+
+#include <ib_smi.h>
+
+#include "mthca_dev.h"
+#include "mthca_cmd.h"
+
+static int mthca_query_device(struct ib_device *ibdev,
+                             struct ib_device_attr *props)
+{
+       struct ib_smp *in_mad  = NULL;
+       struct ib_smp *out_mad = NULL;
+       int err = -ENOMEM;
+       u8 status;
+
+       in_mad  = kmalloc(sizeof *in_mad, GFP_KERNEL);
+       out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
+       if (!in_mad || !out_mad)
+               goto out;
+
+       props->fw_ver        = to_mdev(ibdev)->fw_ver;
+
+       memset(in_mad, 0, sizeof *in_mad);
+       in_mad->base_version       = 1;
+       in_mad->mgmt_class         = IB_MGMT_CLASS_SUBN_LID_ROUTED;
+       in_mad->class_version      = 1;
+       in_mad->method             = IB_MGMT_METHOD_GET;
+       in_mad->attr_id            = IB_SMP_ATTR_NODE_INFO;
+
+       err = mthca_MAD_IFC(to_mdev(ibdev), 1,
+                           1, in_mad, out_mad,
+                           &status);
+       if (err)
+               goto out;
+       if (status) {
+               err = -EINVAL;
+               goto out;
+       }
+
+       props->vendor_id      = be32_to_cpup((u32 *) (out_mad->data + 36)) &
+               0xffffff;
+       props->vendor_part_id = be16_to_cpup((u16 *) (out_mad->data + 30));
+       props->hw_ver         = be16_to_cpup((u16 *) (out_mad->data + 32));
+       memcpy(&props->sys_image_guid, out_mad->data +  4, 8);
+       memcpy(&props->node_guid,      out_mad->data + 12, 8);
+
+       err = 0;
+ out:
+       kfree(in_mad);
+       kfree(out_mad);
+       return err;
+}
+
+static int mthca_query_port(struct ib_device *ibdev,
+                           u8 port, struct ib_port_attr *props)
+{
+       struct ib_smp *in_mad  = NULL;
+       struct ib_smp *out_mad = NULL;
+       int err = -ENOMEM;
+       u8 status;
+
+       in_mad  = kmalloc(sizeof *in_mad, GFP_KERNEL);
+       out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
+       if (!in_mad || !out_mad)
+               goto out;
+
+       memset(in_mad, 0, sizeof *in_mad);
+       in_mad->base_version       = 1;
+       in_mad->mgmt_class         = IB_MGMT_CLASS_SUBN_LID_ROUTED;
+       in_mad->class_version      = 1;
+       in_mad->method             = IB_MGMT_METHOD_GET;
+       in_mad->attr_id            = IB_SMP_ATTR_PORT_INFO;
+       in_mad->attr_mod           = cpu_to_be32(port);
+
+       err = mthca_MAD_IFC(to_mdev(ibdev), 1,
+                           port, in_mad, out_mad,
+                           &status);
+       if (err)
+               goto out;
+       if (status) {
+               err = -EINVAL;
+               goto out;
+       }
+
+       props->lid               = be16_to_cpup((u16 *) (out_mad->data + 16));
+       props->lmc               = out_mad->data[34] & 0x7;
+       props->sm_lid            = be16_to_cpup((u16 *) (out_mad->data + 18));
+       props->sm_sl             = out_mad->data[36] & 0xf;
+       props->state             = out_mad->data[32] & 0xf;
+       props->port_cap_flags    = be32_to_cpup((u32 *) (out_mad->data + 20));
+       props->gid_tbl_len       = to_mdev(ibdev)->limits.gid_table_len;
+       props->pkey_tbl_len      = to_mdev(ibdev)->limits.pkey_table_len;
+       props->qkey_viol_cntr    = be16_to_cpup((u16 *) (out_mad->data + 48));
+       props->active_width      = out_mad->data[31] & 0xf;
+       props->active_speed      = out_mad->data[35] >> 4;
+
+ out:
+       kfree(in_mad);
+       kfree(out_mad);
+       return err;
+}
+
+static int mthca_modify_port(struct ib_device *ibdev,
+                            u8 port, int port_modify_mask,
+                            struct ib_port_modify *props)
+{
+       return 0;
+}
+
+static int mthca_query_pkey(struct ib_device *ibdev,
+                           u8 port, u16 index, u16 *pkey)
+{
+       struct ib_smp *in_mad  = NULL;
+       struct ib_smp *out_mad = NULL;
+       int err = -ENOMEM;
+       u8 status;
+
+       in_mad  = kmalloc(sizeof *in_mad, GFP_KERNEL);
+       out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
+       if (!in_mad || !out_mad)
+               goto out;
+
+       memset(in_mad, 0, sizeof *in_mad);
+       in_mad->base_version       = 1;
+       in_mad->mgmt_class         = IB_MGMT_CLASS_SUBN_LID_ROUTED;
+       in_mad->class_version      = 1;
+       in_mad->method             = IB_MGMT_METHOD_GET;
+       in_mad->attr_id            = IB_SMP_ATTR_PKEY_TABLE;
+       in_mad->attr_mod           = cpu_to_be32(index / 32);
+
+       err = mthca_MAD_IFC(to_mdev(ibdev), 1,
+                           port, in_mad, out_mad,
+                           &status);
+       if (err)
+               goto out;
+       if (status) {
+               err = -EINVAL;
+               goto out;
+       }
+
+       *pkey = be16_to_cpu(((u16 *) out_mad->data)[index % 32]);
+
+ out:
+       kfree(in_mad);
+       kfree(out_mad);
+       return err;
+}
+
+static int mthca_query_gid(struct ib_device *ibdev, u8 port,
+                          int index, union ib_gid *gid)
+{
+       struct ib_smp *in_mad  = NULL;
+       struct ib_smp *out_mad = NULL;
+       int err = -ENOMEM;
+       u8 status;
+
+       in_mad  = kmalloc(sizeof *in_mad, GFP_KERNEL);
+       out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
+       if (!in_mad || !out_mad)
+               goto out;
+
+       memset(in_mad, 0, sizeof *in_mad);
+       in_mad->base_version       = 1;
+       in_mad->mgmt_class         = IB_MGMT_CLASS_SUBN_LID_ROUTED;
+       in_mad->class_version      = 1;
+       in_mad->method             = IB_MGMT_METHOD_GET;
+       in_mad->attr_id            = IB_SMP_ATTR_PORT_INFO;
+       in_mad->attr_mod           = cpu_to_be32(port);
+
+       err = mthca_MAD_IFC(to_mdev(ibdev), 1,
+                           port, in_mad, out_mad,
+                           &status);
+       if (err)
+               goto out;
+       if (status) {
+               err = -EINVAL;
+               goto out;
+       }
+
+       memcpy(gid->raw, out_mad->data + 8, 8);
+
+       memset(in_mad, 0, sizeof *in_mad);
+       in_mad->base_version       = 1;
+       in_mad->mgmt_class         = IB_MGMT_CLASS_SUBN_LID_ROUTED;
+       in_mad->class_version      = 1;
+       in_mad->method             = IB_MGMT_METHOD_GET;
+       in_mad->attr_id            = IB_SMP_ATTR_GUID_INFO;
+       in_mad->attr_mod           = cpu_to_be32(index / 8);
+
+       err = mthca_MAD_IFC(to_mdev(ibdev), 1,
+                           port, in_mad, out_mad,
+                           &status);
+       if (err)
+               goto out;
+       if (status) {
+               err = -EINVAL;
+               goto out;
+       }
+
+       memcpy(gid->raw + 8, out_mad->data + (index % 8) * 16, 8);
+
+ out:
+       kfree(in_mad);
+       kfree(out_mad);
+       return err;
+}
+
+static struct ib_pd *mthca_alloc_pd(struct ib_device *ibdev)
+{
+       struct mthca_pd *pd;
+       int err;
+
+       pd = kmalloc(sizeof *pd, GFP_KERNEL);
+       if (!pd)
+               return ERR_PTR(-ENOMEM);
+
+       err = mthca_pd_alloc(to_mdev(ibdev), pd);
+       if (err) {
+               kfree(pd);
+               return ERR_PTR(err);
+       }
+
+       return &pd->ibpd;
+}
+
+static int mthca_dealloc_pd(struct ib_pd *pd)
+{
+       mthca_pd_free(to_mdev(pd->device), to_mpd(pd));
+       kfree(pd);
+
+       return 0;
+}
+
+static struct ib_ah *mthca_ah_create(struct ib_pd *pd,
+                                    struct ib_ah_attr *ah_attr)
+{
+       int err;
+       struct mthca_ah *ah;
+
+       ah = kmalloc(sizeof *ah, GFP_KERNEL);
+       if (!ah)
+               return ERR_PTR(-ENOMEM);
+
+       err = mthca_create_ah(to_mdev(pd->device), to_mpd(pd), ah_attr, ah);
+       if (err) {
+               kfree(ah);
+               return ERR_PTR(err);
+       }
+
+       return &ah->ibah;
+}
+
+static int mthca_ah_destroy(struct ib_ah *ah)
+{
+       mthca_destroy_ah(to_mdev(ah->device), to_mah(ah));
+       kfree(ah);
+
+       return 0;
+}
+
+static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
+                                    struct ib_qp_init_attr *init_attr)
+{
+       struct mthca_qp *qp;
+       int err;
+
+       switch (init_attr->qp_type) {
+       case IB_QPT_RC:
+       case IB_QPT_UC:
+       case IB_QPT_UD:
+       {
+               qp = kmalloc(sizeof *qp, GFP_KERNEL);
+               if (!qp)
+                       return ERR_PTR(-ENOMEM);
+
+               qp->sq.max    = init_attr->cap.max_send_wr;
+               qp->rq.max    = init_attr->cap.max_recv_wr;
+               qp->sq.max_gs = init_attr->cap.max_send_sge;
+               qp->rq.max_gs = init_attr->cap.max_recv_sge;
+
+               err = mthca_alloc_qp(to_mdev(pd->device), to_mpd(pd),
+                                    to_mcq(init_attr->send_cq),
+                                    to_mcq(init_attr->recv_cq),
+                                    init_attr->qp_type, init_attr->sq_sig_type,
+                                    init_attr->rq_sig_type, qp);
+               qp->ibqp.qp_num = qp->qpn;
+               break;
+       }
+       case IB_QPT_SMI:
+       case IB_QPT_GSI:
+       {
+               qp = kmalloc(sizeof (struct mthca_sqp), GFP_KERNEL);
+               if (!qp)
+                       return ERR_PTR(-ENOMEM);
+
+               qp->sq.max    = init_attr->cap.max_send_wr;
+               qp->rq.max    = init_attr->cap.max_recv_wr;
+               qp->sq.max_gs = init_attr->cap.max_send_sge;
+               qp->rq.max_gs = init_attr->cap.max_recv_sge;
+
+               qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
+
+               err = mthca_alloc_sqp(to_mdev(pd->device), to_mpd(pd),
+                                     to_mcq(init_attr->send_cq),
+                                     to_mcq(init_attr->recv_cq),
+                                     init_attr->sq_sig_type, 
init_attr->rq_sig_type,
+                                     qp->ibqp.qp_num, init_attr->port_num,
+                                     to_msqp(qp));
+               break;
+       }
+       default:
+               /* Don't support raw QPs */
+               return ERR_PTR(-ENOSYS);
+       }
+
+       if (err) {
+               kfree(qp);
+               return ERR_PTR(err);
+       }
+
+        init_attr->cap.max_inline_data = 0;
+
+       return &qp->ibqp;
+}
+
+static int mthca_destroy_qp(struct ib_qp *qp)
+{
+       mthca_free_qp(to_mdev(qp->device), to_mqp(qp));
+       kfree(qp);
+       return 0;
+}
+
+static struct ib_cq *mthca_create_cq(struct ib_device *ibdev, int entries)
+{
+       struct mthca_cq *cq;
+       int nent;
+       int err;
+
+       cq = kmalloc(sizeof *cq, GFP_KERNEL);
+       if (!cq)
+               return ERR_PTR(-ENOMEM);
+
+       for (nent = 1; nent <= entries; nent <<= 1)
+               ; /* nothing */
+
+       err = mthca_init_cq(to_mdev(ibdev), nent, cq);
+       if (err) {
+               kfree(cq);
+               cq = ERR_PTR(err);
+       } else
+               cq->ibcq.cqe = nent - 1;
+
+       return &cq->ibcq;
+}
+
+static int mthca_destroy_cq(struct ib_cq *cq)
+{
+       mthca_free_cq(to_mdev(cq->device), to_mcq(cq));
+       kfree(cq);
+
+       return 0;
+}
+
+static int mthca_req_notify_cq(struct ib_cq *cq, enum ib_cq_notify notify)
+{
+       mthca_arm_cq(to_mdev(cq->device), to_mcq(cq),
+                    notify == IB_CQ_SOLICITED);
+       return 0;
+}
+
+static inline u32 convert_access(int acc)
+{
+       return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC       : 
0) |
+              (acc & IB_ACCESS_REMOTE_WRITE  ? MTHCA_MPT_FLAG_REMOTE_WRITE : 
0) |
+              (acc & IB_ACCESS_REMOTE_READ   ? MTHCA_MPT_FLAG_REMOTE_READ  : 
0) |
+              (acc & IB_ACCESS_LOCAL_WRITE   ? MTHCA_MPT_FLAG_LOCAL_WRITE  : 
0) |
+              MTHCA_MPT_FLAG_LOCAL_READ;
+}
+
+static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc)
+{
+       struct mthca_mr *mr;
+       int err;
+
+       mr = kmalloc(sizeof *mr, GFP_KERNEL);
+       if (!mr)
+               return ERR_PTR(-ENOMEM);
+
+       err = mthca_mr_alloc_notrans(to_mdev(pd->device),
+                                    to_mpd(pd)->pd_num,
+                                    convert_access(acc), mr);
+
+       if (err) {
+               kfree(mr);
+               return ERR_PTR(err);
+       }
+
+       return &mr->ibmr;
+}
+
+static struct ib_mr *mthca_reg_phys_mr(struct ib_pd       *pd,
+                                      struct ib_phys_buf *buffer_list,
+                                      int                 num_phys_buf,
+                                      int                 acc,
+                                      u64                *iova_start)
+{
+       struct mthca_mr *mr;
+       u64 *page_list;
+       u64 total_size;
+       u64 mask;
+       int shift;
+       int npages;
+       int err;
+       int i, j, n;
+
+       /* First check that we have enough alignment */
+       if ((*iova_start & ~PAGE_MASK) != (buffer_list[0].addr & ~PAGE_MASK))
+               return ERR_PTR(-EINVAL);
+
+       if (num_phys_buf > 1 &&
+           ((buffer_list[0].addr + buffer_list[0].size) & ~PAGE_MASK))
+               return ERR_PTR(-EINVAL);
+
+       mask = 0;
+       total_size = 0;
+       for (i = 0; i < num_phys_buf; ++i) {
+               if (buffer_list[i].addr & ~PAGE_MASK)
+                       return ERR_PTR(-EINVAL);
+               if (i != 0 && i != num_phys_buf - 1 &&
+                   (buffer_list[i].size & ~PAGE_MASK))
+                       return ERR_PTR(-EINVAL);
+
+               total_size += buffer_list[i].size;
+               if (i > 0)
+                       mask |= buffer_list[i].addr;
+       }
+
+       /* Find largest page shift we can use to cover buffers */
+       for (shift = PAGE_SHIFT; shift < 31; ++shift)
+               if (num_phys_buf > 1) {
+                       if ((1ULL << shift) & mask)
+                               break;
+               } else {
+                       if (1ULL << shift >=
+                           buffer_list[0].size +
+                           (buffer_list[0].addr & ((1ULL << shift) - 1)))
+                               break;
+               }
+
+       buffer_list[0].size += buffer_list[0].addr & ((1ULL << shift) - 1);
+       buffer_list[0].addr &= ~0ull << shift;
+
+       mr = kmalloc(sizeof *mr, GFP_KERNEL);
+       if (!mr)
+               return ERR_PTR(-ENOMEM);
+
+       npages = 0;
+       for (i = 0; i < num_phys_buf; ++i)
+               npages += (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
+
+       if (!npages)
+               return &mr->ibmr;
+
+       page_list = kmalloc(npages * sizeof *page_list, GFP_KERNEL);
+       if (!page_list) {
+               kfree(mr);
+               return ERR_PTR(-ENOMEM);
+       }
+
+       n = 0;
+       for (i = 0; i < num_phys_buf; ++i)
+               for (j = 0;
+                    j < (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
+                    ++j)
+                       page_list[n++] = buffer_list[i].addr + ((u64) j << 
shift);
+
+       mthca_dbg(to_mdev(pd->device), "Registering memory at %llx (iova %llx) "
+                 "in PD %x; shift %d, npages %d.\n",
+                 (unsigned long long) buffer_list[0].addr,
+                 (unsigned long long) *iova_start,
+                 to_mpd(pd)->pd_num,
+                 shift, npages);
+
+       err = mthca_mr_alloc_phys(to_mdev(pd->device),
+                                 to_mpd(pd)->pd_num,
+                                 page_list, shift, npages,
+                                 *iova_start, total_size,
+                                 convert_access(acc), mr);
+
+       if (err) {
+               kfree(mr);
+               return ERR_PTR(err);
+       }
+
+       kfree(page_list);
+       return &mr->ibmr;
+}
+
+static int mthca_dereg_mr(struct ib_mr *mr)
+{
+       mthca_free_mr(to_mdev(mr->device), to_mmr(mr));
+       kfree(mr);
+       return 0;
+}
+
+static ssize_t show_rev(struct class_device *cdev, char *buf)
+{
+       struct mthca_dev *dev = container_of(cdev, struct mthca_dev, 
ib_dev.class_dev);
+       return sprintf(buf, "%x\n", dev->rev_id);
+}
+
+static ssize_t show_fw_ver(struct class_device *cdev, char *buf)
+{
+       struct mthca_dev *dev = container_of(cdev, struct mthca_dev, 
ib_dev.class_dev);
+       return sprintf(buf, "%x.%x.%x\n", (int) (dev->fw_ver >> 32),
+                      (int) (dev->fw_ver >> 16) & 0xffff,
+                      (int) dev->fw_ver & 0xffff);
+}
+
+static ssize_t show_hca(struct class_device *cdev, char *buf)
+{
+       struct mthca_dev *dev = container_of(cdev, struct mthca_dev, 
ib_dev.class_dev);
+       switch (dev->hca_type) {
+       case TAVOR:        return sprintf(buf, "MT23108\n");
+       case ARBEL_COMPAT: return sprintf(buf, "MT25208 (MT23108 compat 
mode)\n");
+       case ARBEL_NATIVE: return sprintf(buf, "MT25208\n");
+       default:           return sprintf(buf, "unknown\n");
+       }
+}
+
+static CLASS_DEVICE_ATTR(hw_rev,   S_IRUGO, show_rev,    NULL);
+static CLASS_DEVICE_ATTR(fw_ver,   S_IRUGO, show_fw_ver, NULL);
+static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca,    NULL);
+
+static struct class_device_attribute *mthca_class_attributes[] = {
+       &class_device_attr_hw_rev,
+       &class_device_attr_fw_ver,
+       &class_device_attr_hca_type
+};
+
+int mthca_register_device(struct mthca_dev *dev)
+{
+       int ret;
+       int i;
+
+       strlcpy(dev->ib_dev.name, "mthca%d", IB_DEVICE_NAME_MAX);
+       dev->ib_dev.node_type            = IB_NODE_CA;
+       dev->ib_dev.phys_port_cnt        = dev->limits.num_ports;
+       dev->ib_dev.dma_device           = &dev->pdev->dev;
+       dev->ib_dev.class_dev.dev        = &dev->pdev->dev;
+       dev->ib_dev.query_device         = mthca_query_device;
+       dev->ib_dev.query_port           = mthca_query_port;
+       dev->ib_dev.modify_port          = mthca_modify_port;
+       dev->ib_dev.query_pkey           = mthca_query_pkey;
+       dev->ib_dev.query_gid            = mthca_query_gid;
+       dev->ib_dev.alloc_pd             = mthca_alloc_pd;
+       dev->ib_dev.dealloc_pd           = mthca_dealloc_pd;
+       dev->ib_dev.create_ah            = mthca_ah_create;
+       dev->ib_dev.destroy_ah           = mthca_ah_destroy;
+       dev->ib_dev.create_qp            = mthca_create_qp;
+       dev->ib_dev.modify_qp            = mthca_modify_qp;
+       dev->ib_dev.destroy_qp           = mthca_destroy_qp;
+       dev->ib_dev.post_send            = mthca_post_send;
+       dev->ib_dev.post_recv            = mthca_post_receive;
+       dev->ib_dev.create_cq            = mthca_create_cq;
+       dev->ib_dev.destroy_cq           = mthca_destroy_cq;
+       dev->ib_dev.poll_cq              = mthca_poll_cq;
+       dev->ib_dev.req_notify_cq        = mthca_req_notify_cq;
+       dev->ib_dev.get_dma_mr           = mthca_get_dma_mr;
+       dev->ib_dev.reg_phys_mr          = mthca_reg_phys_mr;
+       dev->ib_dev.dereg_mr             = mthca_dereg_mr;
+       dev->ib_dev.attach_mcast         = mthca_multicast_attach;
+       dev->ib_dev.detach_mcast         = mthca_multicast_detach;
+       dev->ib_dev.process_mad          = mthca_process_mad;
+
+       ret = ib_register_device(&dev->ib_dev);
+       if (ret)
+               return ret;
+
+       for (i = 0; i < ARRAY_SIZE(mthca_class_attributes); ++i) {
+               ret = class_device_create_file(&dev->ib_dev.class_dev,
+                                              mthca_class_attributes[i]);
+               if (ret) {
+                       ib_unregister_device(&dev->ib_dev);
+                       return ret;
+               }
+       }
+
+       return 0;
+}
+
+void mthca_unregister_device(struct mthca_dev *dev)
+{
+       ib_unregister_device(&dev->ib_dev);
+}
--- /dev/null   1970-01-01 00:00:00.000000000 +0000
+++ linux-bk/drivers/infiniband/hw/mthca/mthca_provider.h       2004-12-27 
21:48:22.091714405 -0800
@@ -0,0 +1,225 @@
+/*
+ * Copyright (c) 2004 Topspin Communications.  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
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * 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: mthca_provider.h 1349 2004-12-16 21:09:43Z roland $
+ */
+
+#ifndef MTHCA_PROVIDER_H
+#define MTHCA_PROVIDER_H
+
+#include <ib_verbs.h>
+#include <ib_pack.h>
+
+#define MTHCA_MPT_FLAG_ATOMIC        (1 << 14)
+#define MTHCA_MPT_FLAG_REMOTE_WRITE  (1 << 13)
+#define MTHCA_MPT_FLAG_REMOTE_READ   (1 << 12)
+#define MTHCA_MPT_FLAG_LOCAL_WRITE   (1 << 11)
+#define MTHCA_MPT_FLAG_LOCAL_READ    (1 << 10)
+
+struct mthca_buf_list {
+       void *buf;
+       DECLARE_PCI_UNMAP_ADDR(mapping)
+};
+
+struct mthca_mr {
+       struct ib_mr ibmr;
+       int order;
+       u32 first_seg;
+};
+
+struct mthca_pd {
+       struct ib_pd    ibpd;
+       u32             pd_num;
+       atomic_t        sqp_count;
+       struct mthca_mr ntmr;
+};
+
+struct mthca_eq {
+       struct mthca_dev      *dev;
+       int                    eqn;
+       u32                    ecr_mask;
+       u16                    msi_x_vector;
+       u16                    msi_x_entry;
+       int                    have_irq;
+       int                    nent;
+       int                    cons_index;
+       struct mthca_buf_list *page_list;
+       struct mthca_mr        mr;
+};
+
+struct mthca_av;
+
+struct mthca_ah {
+       struct ib_ah     ibah;
+       int              on_hca;
+       u32              key;
+       struct mthca_av *av;
+       dma_addr_t       avdma;
+};
+
+/*
+ * Quick description of our CQ/QP locking scheme:
+ *
+ * We have one global lock that protects dev->cq/qp_table.  Each
+ * struct mthca_cq/qp also has its own lock.  An individual qp lock
+ * may be taken inside of an individual cq lock.  Both cqs attached to
+ * a qp may be locked, with the send cq locked first.  No other
+ * nesting should be done.
+ *
+ * Each struct mthca_cq/qp also has an atomic_t ref count.  The
+ * pointer from the cq/qp_table to the struct counts as one reference.
+ * This reference also is good for access through the consumer API, so
+ * modifying the CQ/QP etc doesn't need to take another reference.
+ * Access because of a completion being polled does need a reference.
+ *
+ * Finally, each struct mthca_cq/qp has a wait_queue_head_t for the
+ * destroy function to sleep on.
+ *
+ * This means that access from the consumer API requires nothing but
+ * taking the struct's lock.
+ *
+ * Access because of a completion event should go as follows:
+ * - lock cq/qp_table and look up struct
+ * - increment ref count in struct
+ * - drop cq/qp_table lock
+ * - lock struct, do your thing, and unlock struct
+ * - decrement ref count; if zero, wake up waiters
+ *
+ * To destroy a CQ/QP, we can do the following:
+ * - lock cq/qp_table, remove pointer, unlock cq/qp_table lock
+ * - decrement ref count
+ * - wait_event until ref count is zero
+ *
+ * It is the consumer's responsibilty to make sure that no QP
+ * operations (WQE posting or state modification) are pending when the
+ * QP is destroyed.  Also, the consumer must make sure that calls to
+ * qp_modify are serialized.
+ *
+ * Possible optimizations (wait for profile data to see if/where we
+ * have locks bouncing between CPUs):
+ * - split cq/qp table lock into n separate (cache-aligned) locks,
+ *   indexed (say) by the page in the table
+ * - split QP struct lock into three (one for common info, one for the
+ *   send queue and one for the receive queue)
+ */
+
+struct mthca_cq {
+       struct ib_cq           ibcq;
+       spinlock_t             lock;
+       atomic_t               refcount;
+       int                    cqn;
+       int                    cons_index;
+       int                    is_direct;
+       union {
+               struct mthca_buf_list direct;
+               struct mthca_buf_list *page_list;
+       }                      queue;
+       struct mthca_mr        mr;
+       wait_queue_head_t      wait;
+};
+
+struct mthca_wq {
+       int   max;
+       int   cur;
+       int   next;
+       int   last_comp;
+       void *last;
+       int   max_gs;
+       int   wqe_shift;
+       enum ib_sig_type policy;
+};
+
+struct mthca_qp {
+       struct ib_qp           ibqp;
+       spinlock_t             lock;
+       atomic_t               refcount;
+       u32                    qpn;
+       int                    transport;
+       enum ib_qp_state       state;
+       int                    is_direct;
+       struct mthca_mr        mr;
+
+       struct mthca_wq        rq;
+       struct mthca_wq        sq;
+       int                    send_wqe_offset;
+
+       u64                   *wrid;
+       union {
+               struct mthca_buf_list direct;
+               struct mthca_buf_list *page_list;
+       }                      queue;
+
+       wait_queue_head_t      wait;
+};
+
+struct mthca_sqp {
+       struct mthca_qp qp;
+       int             port;
+       int             pkey_index;
+       u32             qkey;
+       u32             send_psn;
+       struct ib_ud_header ud_header;
+       int             header_buf_size;
+       void           *header_buf;
+       dma_addr_t      header_dma;
+};
+
+static inline struct mthca_mr *to_mmr(struct ib_mr *ibmr)
+{
+       return container_of(ibmr, struct mthca_mr, ibmr);
+}
+
+static inline struct mthca_pd *to_mpd(struct ib_pd *ibpd)
+{
+       return container_of(ibpd, struct mthca_pd, ibpd);
+}
+
+static inline struct mthca_ah *to_mah(struct ib_ah *ibah)
+{
+       return container_of(ibah, struct mthca_ah, ibah);
+}
+
+static inline struct mthca_cq *to_mcq(struct ib_cq *ibcq)
+{
+       return container_of(ibcq, struct mthca_cq, ibcq);
+}
+
+static inline struct mthca_qp *to_mqp(struct ib_qp *ibqp)
+{
+       return container_of(ibqp, struct mthca_qp, ibqp);
+}
+
+static inline struct mthca_sqp *to_msqp(struct mthca_qp *qp)
+{
+       return container_of(qp, struct mthca_sqp, qp);
+}
+
+#endif /* MTHCA_PROVIDER_H */


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