[PATCH][RFC/v2][8/21] Add Mellanox HCA low-level driver (midlayer interface)
From: Roland Dreier
Date: Tue Nov 23 2004 - 11:55:04 EST
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 2004-11-23 08:10:19.734652499 -0800
@@ -0,0 +1,629 @@
+/*
+ * 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 at
+ * <http://www.fsf.org/copyleft/gpl.html>, or the OpenIB.org BSD
+ * license, available in the LICENSE.TXT file accompanying this
+ * software. These details are also available at
+ * <http://openib.org/license.html>.
+ *
+ * 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.
+ *
+ * Copyright (c) 2004 Topspin Communications. All rights reserved.
+ *
+ * $Id: mthca_provider.c 1169 2004-11-08 17:23:45Z roland $
+ */
+
+#include <ib_mad.h>
+
+#include "mthca_dev.h"
+#include "mthca_cmd.h"
+
+/* Temporary until we get core support straightened out */
+enum {
+ IB_SMP_ATTRIB_NODE_INFO = 0x0011,
+ IB_SMP_ATTRIB_GUID_INFO = 0x0014,
+ IB_SMP_ATTRIB_PORT_INFO = 0x0015,
+ IB_SMP_ATTRIB_PKEY_TABLE = 0x0016
+};
+
+static int mthca_query_device(struct ib_device *ibdev,
+ struct ib_device_attr *props)
+{
+ struct ib_mad *in_mad = NULL;
+ struct ib_mad *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->mad_hdr.base_version = 1;
+ in_mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
+ in_mad->mad_hdr.class_version = 1;
+ in_mad->mad_hdr.method = IB_MGMT_METHOD_GET;
+ in_mad->mad_hdr.attr_id = cpu_to_be16(IB_SMP_ATTRIB_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 + 76)) &
+ 0xffffff;
+ props->vendor_part_id = be16_to_cpup((u16 *) (out_mad->data + 70));
+ props->hw_ver = be16_to_cpup((u16 *) (out_mad->data + 72));
+ memcpy(&props->sys_image_guid, out_mad->data + 44, 8);
+ memcpy(&props->node_guid, out_mad->data + 52, 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_mad *in_mad = NULL;
+ struct ib_mad *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->mad_hdr.base_version = 1;
+ in_mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
+ in_mad->mad_hdr.class_version = 1;
+ in_mad->mad_hdr.method = IB_MGMT_METHOD_GET;
+ in_mad->mad_hdr.attr_id = cpu_to_be16(IB_SMP_ATTRIB_PORT_INFO);
+ in_mad->mad_hdr.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 + 56));
+ props->lmc = (*(u8 *) (out_mad->data + 74)) & 0x7;
+ props->sm_lid = be16_to_cpup((u16 *) (out_mad->data + 58));
+ props->sm_sl = (*(u8 *) (out_mad->data + 76)) & 0xf;
+ props->state = (*(u8 *) (out_mad->data + 72)) & 0xf;
+ props->port_cap_flags = be32_to_cpup((u32 *) (out_mad->data + 60));
+ 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 + 88));
+
+ 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_mad *in_mad = NULL;
+ struct ib_mad *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->mad_hdr.base_version = 1;
+ in_mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
+ in_mad->mad_hdr.class_version = 1;
+ in_mad->mad_hdr.method = IB_MGMT_METHOD_GET;
+ in_mad->mad_hdr.attr_id = cpu_to_be16(IB_SMP_ATTRIB_PKEY_TABLE);
+ in_mad->mad_hdr.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 + 40))[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_mad *in_mad = NULL;
+ struct ib_mad *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->mad_hdr.base_version = 1;
+ in_mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
+ in_mad->mad_hdr.class_version = 1;
+ in_mad->mad_hdr.method = IB_MGMT_METHOD_GET;
+ in_mad->mad_hdr.attr_id = cpu_to_be16(IB_SMP_ATTRIB_PORT_INFO);
+ in_mad->mad_hdr.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 + 48, 8);
+
+ memset(in_mad, 0, sizeof *in_mad);
+ in_mad->mad_hdr.base_version = 1;
+ in_mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
+ in_mad->mad_hdr.class_version = 1;
+ in_mad->mad_hdr.method = IB_MGMT_METHOD_GET;
+ in_mad->mad_hdr.attr_id = cpu_to_be16(IB_SMP_ATTRIB_GUID_INFO);
+ in_mad->mad_hdr.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 + 40 + (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;
+
+ 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);
+}
+
+/*
+ * Local Variables:
+ * c-file-style: "linux"
+ * indent-tabs-mode: t
+ * End:
+ */
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-bk/drivers/infiniband/hw/mthca/mthca_provider.h 2004-11-23 08:10:19.785644981 -0800
@@ -0,0 +1,221 @@
+/*
+ * 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 at
+ * <http://www.fsf.org/copyleft/gpl.html>, or the OpenIB.org BSD
+ * license, available in the LICENSE.TXT file accompanying this
+ * software. These details are also available at
+ * <http://openib.org/license.html>.
+ *
+ * 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.
+ *
+ * Copyright (c) 2004 Topspin Communications. All rights reserved.
+ *
+ * $Id: mthca_provider.h 996 2004-10-14 05:47:49Z 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 */
+
+/*
+ * Local Variables:
+ * c-file-style: "linux"
+ * indent-tabs-mode: t
+ * End:
+ */
-
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