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Diffstat (limited to 'drivers/infiniband/hw/mana/qp.c')
-rw-r--r--drivers/infiniband/hw/mana/qp.c509
1 files changed, 509 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mana/qp.c b/drivers/infiniband/hw/mana/qp.c
new file mode 100644
index 0000000000..4b3b5b274e
--- /dev/null
+++ b/drivers/infiniband/hw/mana/qp.c
@@ -0,0 +1,509 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2022, Microsoft Corporation. All rights reserved.
+ */
+
+#include "mana_ib.h"
+
+static int mana_ib_cfg_vport_steering(struct mana_ib_dev *dev,
+ struct net_device *ndev,
+ mana_handle_t default_rxobj,
+ mana_handle_t ind_table[],
+ u32 log_ind_tbl_size, u32 rx_hash_key_len,
+ u8 *rx_hash_key)
+{
+ struct mana_port_context *mpc = netdev_priv(ndev);
+ struct mana_cfg_rx_steer_req_v2 *req;
+ struct mana_cfg_rx_steer_resp resp = {};
+ mana_handle_t *req_indir_tab;
+ struct gdma_context *gc;
+ struct gdma_dev *mdev;
+ u32 req_buf_size;
+ int i, err;
+
+ mdev = dev->gdma_dev;
+ gc = mdev->gdma_context;
+
+ req_buf_size =
+ sizeof(*req) + sizeof(mana_handle_t) * MANA_INDIRECT_TABLE_SIZE;
+ req = kzalloc(req_buf_size, GFP_KERNEL);
+ if (!req)
+ return -ENOMEM;
+
+ mana_gd_init_req_hdr(&req->hdr, MANA_CONFIG_VPORT_RX, req_buf_size,
+ sizeof(resp));
+
+ req->hdr.req.msg_version = GDMA_MESSAGE_V2;
+
+ req->vport = mpc->port_handle;
+ req->rx_enable = 1;
+ req->update_default_rxobj = 1;
+ req->default_rxobj = default_rxobj;
+ req->hdr.dev_id = mdev->dev_id;
+
+ /* If there are more than 1 entries in indirection table, enable RSS */
+ if (log_ind_tbl_size)
+ req->rss_enable = true;
+
+ req->num_indir_entries = MANA_INDIRECT_TABLE_SIZE;
+ req->indir_tab_offset = sizeof(*req);
+ req->update_indir_tab = true;
+ req->cqe_coalescing_enable = 1;
+
+ req_indir_tab = (mana_handle_t *)(req + 1);
+ /* The ind table passed to the hardware must have
+ * MANA_INDIRECT_TABLE_SIZE entries. Adjust the verb
+ * ind_table to MANA_INDIRECT_TABLE_SIZE if required
+ */
+ ibdev_dbg(&dev->ib_dev, "ind table size %u\n", 1 << log_ind_tbl_size);
+ for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++) {
+ req_indir_tab[i] = ind_table[i % (1 << log_ind_tbl_size)];
+ ibdev_dbg(&dev->ib_dev, "index %u handle 0x%llx\n", i,
+ req_indir_tab[i]);
+ }
+
+ req->update_hashkey = true;
+ if (rx_hash_key_len)
+ memcpy(req->hashkey, rx_hash_key, rx_hash_key_len);
+ else
+ netdev_rss_key_fill(req->hashkey, MANA_HASH_KEY_SIZE);
+
+ ibdev_dbg(&dev->ib_dev, "vport handle %llu default_rxobj 0x%llx\n",
+ req->vport, default_rxobj);
+
+ err = mana_gd_send_request(gc, req_buf_size, req, sizeof(resp), &resp);
+ if (err) {
+ netdev_err(ndev, "Failed to configure vPort RX: %d\n", err);
+ goto out;
+ }
+
+ if (resp.hdr.status) {
+ netdev_err(ndev, "vPort RX configuration failed: 0x%x\n",
+ resp.hdr.status);
+ err = -EPROTO;
+ goto out;
+ }
+
+ netdev_info(ndev, "Configured steering vPort %llu log_entries %u\n",
+ mpc->port_handle, log_ind_tbl_size);
+
+out:
+ kfree(req);
+ return err;
+}
+
+static int mana_ib_create_qp_rss(struct ib_qp *ibqp, struct ib_pd *pd,
+ struct ib_qp_init_attr *attr,
+ struct ib_udata *udata)
+{
+ struct mana_ib_qp *qp = container_of(ibqp, struct mana_ib_qp, ibqp);
+ struct mana_ib_dev *mdev =
+ container_of(pd->device, struct mana_ib_dev, ib_dev);
+ struct ib_rwq_ind_table *ind_tbl = attr->rwq_ind_tbl;
+ struct mana_ib_create_qp_rss_resp resp = {};
+ struct mana_ib_create_qp_rss ucmd = {};
+ struct gdma_dev *gd = mdev->gdma_dev;
+ mana_handle_t *mana_ind_table;
+ struct mana_port_context *mpc;
+ struct mana_context *mc;
+ struct net_device *ndev;
+ struct mana_ib_cq *cq;
+ struct mana_ib_wq *wq;
+ unsigned int ind_tbl_size;
+ struct ib_cq *ibcq;
+ struct ib_wq *ibwq;
+ int i = 0;
+ u32 port;
+ int ret;
+
+ mc = gd->driver_data;
+
+ if (!udata || udata->inlen < sizeof(ucmd))
+ return -EINVAL;
+
+ ret = ib_copy_from_udata(&ucmd, udata, min(sizeof(ucmd), udata->inlen));
+ if (ret) {
+ ibdev_dbg(&mdev->ib_dev,
+ "Failed copy from udata for create rss-qp, err %d\n",
+ ret);
+ return ret;
+ }
+
+ if (attr->cap.max_recv_wr > MAX_SEND_BUFFERS_PER_QUEUE) {
+ ibdev_dbg(&mdev->ib_dev,
+ "Requested max_recv_wr %d exceeding limit\n",
+ attr->cap.max_recv_wr);
+ return -EINVAL;
+ }
+
+ if (attr->cap.max_recv_sge > MAX_RX_WQE_SGL_ENTRIES) {
+ ibdev_dbg(&mdev->ib_dev,
+ "Requested max_recv_sge %d exceeding limit\n",
+ attr->cap.max_recv_sge);
+ return -EINVAL;
+ }
+
+ ind_tbl_size = 1 << ind_tbl->log_ind_tbl_size;
+ if (ind_tbl_size > MANA_INDIRECT_TABLE_SIZE) {
+ ibdev_dbg(&mdev->ib_dev,
+ "Indirect table size %d exceeding limit\n",
+ ind_tbl_size);
+ return -EINVAL;
+ }
+
+ if (ucmd.rx_hash_function != MANA_IB_RX_HASH_FUNC_TOEPLITZ) {
+ ibdev_dbg(&mdev->ib_dev,
+ "RX Hash function is not supported, %d\n",
+ ucmd.rx_hash_function);
+ return -EINVAL;
+ }
+
+ /* IB ports start with 1, MANA start with 0 */
+ port = ucmd.port;
+ if (port < 1 || port > mc->num_ports) {
+ ibdev_dbg(&mdev->ib_dev, "Invalid port %u in creating qp\n",
+ port);
+ return -EINVAL;
+ }
+ ndev = mc->ports[port - 1];
+ mpc = netdev_priv(ndev);
+
+ ibdev_dbg(&mdev->ib_dev, "rx_hash_function %d port %d\n",
+ ucmd.rx_hash_function, port);
+
+ mana_ind_table = kcalloc(ind_tbl_size, sizeof(mana_handle_t),
+ GFP_KERNEL);
+ if (!mana_ind_table) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ qp->port = port;
+
+ for (i = 0; i < ind_tbl_size; i++) {
+ struct mana_obj_spec wq_spec = {};
+ struct mana_obj_spec cq_spec = {};
+
+ ibwq = ind_tbl->ind_tbl[i];
+ wq = container_of(ibwq, struct mana_ib_wq, ibwq);
+
+ ibcq = ibwq->cq;
+ cq = container_of(ibcq, struct mana_ib_cq, ibcq);
+
+ wq_spec.gdma_region = wq->gdma_region;
+ wq_spec.queue_size = wq->wq_buf_size;
+
+ cq_spec.gdma_region = cq->gdma_region;
+ cq_spec.queue_size = cq->cqe * COMP_ENTRY_SIZE;
+ cq_spec.modr_ctx_id = 0;
+ cq_spec.attached_eq = GDMA_CQ_NO_EQ;
+
+ ret = mana_create_wq_obj(mpc, mpc->port_handle, GDMA_RQ,
+ &wq_spec, &cq_spec, &wq->rx_object);
+ if (ret)
+ goto fail;
+
+ /* The GDMA regions are now owned by the WQ object */
+ wq->gdma_region = GDMA_INVALID_DMA_REGION;
+ cq->gdma_region = GDMA_INVALID_DMA_REGION;
+
+ wq->id = wq_spec.queue_index;
+ cq->id = cq_spec.queue_index;
+
+ ibdev_dbg(&mdev->ib_dev,
+ "ret %d rx_object 0x%llx wq id %llu cq id %llu\n",
+ ret, wq->rx_object, wq->id, cq->id);
+
+ resp.entries[i].cqid = cq->id;
+ resp.entries[i].wqid = wq->id;
+
+ mana_ind_table[i] = wq->rx_object;
+ }
+ resp.num_entries = i;
+
+ ret = mana_ib_cfg_vport_steering(mdev, ndev, wq->rx_object,
+ mana_ind_table,
+ ind_tbl->log_ind_tbl_size,
+ ucmd.rx_hash_key_len,
+ ucmd.rx_hash_key);
+ if (ret)
+ goto fail;
+
+ ret = ib_copy_to_udata(udata, &resp, sizeof(resp));
+ if (ret) {
+ ibdev_dbg(&mdev->ib_dev,
+ "Failed to copy to udata create rss-qp, %d\n",
+ ret);
+ goto fail;
+ }
+
+ kfree(mana_ind_table);
+
+ return 0;
+
+fail:
+ while (i-- > 0) {
+ ibwq = ind_tbl->ind_tbl[i];
+ wq = container_of(ibwq, struct mana_ib_wq, ibwq);
+ mana_destroy_wq_obj(mpc, GDMA_RQ, wq->rx_object);
+ }
+
+ kfree(mana_ind_table);
+
+ return ret;
+}
+
+static int mana_ib_create_qp_raw(struct ib_qp *ibqp, struct ib_pd *ibpd,
+ struct ib_qp_init_attr *attr,
+ struct ib_udata *udata)
+{
+ struct mana_ib_pd *pd = container_of(ibpd, struct mana_ib_pd, ibpd);
+ struct mana_ib_qp *qp = container_of(ibqp, struct mana_ib_qp, ibqp);
+ struct mana_ib_dev *mdev =
+ container_of(ibpd->device, struct mana_ib_dev, ib_dev);
+ struct mana_ib_cq *send_cq =
+ container_of(attr->send_cq, struct mana_ib_cq, ibcq);
+ struct mana_ib_ucontext *mana_ucontext =
+ rdma_udata_to_drv_context(udata, struct mana_ib_ucontext,
+ ibucontext);
+ struct mana_ib_create_qp_resp resp = {};
+ struct gdma_dev *gd = mdev->gdma_dev;
+ struct mana_ib_create_qp ucmd = {};
+ struct mana_obj_spec wq_spec = {};
+ struct mana_obj_spec cq_spec = {};
+ struct mana_port_context *mpc;
+ struct mana_context *mc;
+ struct net_device *ndev;
+ struct ib_umem *umem;
+ int err;
+ u32 port;
+
+ mc = gd->driver_data;
+
+ if (!mana_ucontext || udata->inlen < sizeof(ucmd))
+ return -EINVAL;
+
+ err = ib_copy_from_udata(&ucmd, udata, min(sizeof(ucmd), udata->inlen));
+ if (err) {
+ ibdev_dbg(&mdev->ib_dev,
+ "Failed to copy from udata create qp-raw, %d\n", err);
+ return err;
+ }
+
+ /* IB ports start with 1, MANA Ethernet ports start with 0 */
+ port = ucmd.port;
+ if (port < 1 || port > mc->num_ports)
+ return -EINVAL;
+
+ if (attr->cap.max_send_wr > MAX_SEND_BUFFERS_PER_QUEUE) {
+ ibdev_dbg(&mdev->ib_dev,
+ "Requested max_send_wr %d exceeding limit\n",
+ attr->cap.max_send_wr);
+ return -EINVAL;
+ }
+
+ if (attr->cap.max_send_sge > MAX_TX_WQE_SGL_ENTRIES) {
+ ibdev_dbg(&mdev->ib_dev,
+ "Requested max_send_sge %d exceeding limit\n",
+ attr->cap.max_send_sge);
+ return -EINVAL;
+ }
+
+ ndev = mc->ports[port - 1];
+ mpc = netdev_priv(ndev);
+ ibdev_dbg(&mdev->ib_dev, "port %u ndev %p mpc %p\n", port, ndev, mpc);
+
+ err = mana_ib_cfg_vport(mdev, port - 1, pd, mana_ucontext->doorbell);
+ if (err)
+ return -ENODEV;
+
+ qp->port = port;
+
+ ibdev_dbg(&mdev->ib_dev, "ucmd sq_buf_addr 0x%llx port %u\n",
+ ucmd.sq_buf_addr, ucmd.port);
+
+ umem = ib_umem_get(ibpd->device, ucmd.sq_buf_addr, ucmd.sq_buf_size,
+ IB_ACCESS_LOCAL_WRITE);
+ if (IS_ERR(umem)) {
+ err = PTR_ERR(umem);
+ ibdev_dbg(&mdev->ib_dev,
+ "Failed to get umem for create qp-raw, err %d\n",
+ err);
+ goto err_free_vport;
+ }
+ qp->sq_umem = umem;
+
+ err = mana_ib_gd_create_dma_region(mdev, qp->sq_umem,
+ &qp->sq_gdma_region);
+ if (err) {
+ ibdev_dbg(&mdev->ib_dev,
+ "Failed to create dma region for create qp-raw, %d\n",
+ err);
+ goto err_release_umem;
+ }
+
+ ibdev_dbg(&mdev->ib_dev,
+ "mana_ib_gd_create_dma_region ret %d gdma_region 0x%llx\n",
+ err, qp->sq_gdma_region);
+
+ /* Create a WQ on the same port handle used by the Ethernet */
+ wq_spec.gdma_region = qp->sq_gdma_region;
+ wq_spec.queue_size = ucmd.sq_buf_size;
+
+ cq_spec.gdma_region = send_cq->gdma_region;
+ cq_spec.queue_size = send_cq->cqe * COMP_ENTRY_SIZE;
+ cq_spec.modr_ctx_id = 0;
+ cq_spec.attached_eq = GDMA_CQ_NO_EQ;
+
+ err = mana_create_wq_obj(mpc, mpc->port_handle, GDMA_SQ, &wq_spec,
+ &cq_spec, &qp->tx_object);
+ if (err) {
+ ibdev_dbg(&mdev->ib_dev,
+ "Failed to create wq for create raw-qp, err %d\n",
+ err);
+ goto err_destroy_dma_region;
+ }
+
+ /* The GDMA regions are now owned by the WQ object */
+ qp->sq_gdma_region = GDMA_INVALID_DMA_REGION;
+ send_cq->gdma_region = GDMA_INVALID_DMA_REGION;
+
+ qp->sq_id = wq_spec.queue_index;
+ send_cq->id = cq_spec.queue_index;
+
+ ibdev_dbg(&mdev->ib_dev,
+ "ret %d qp->tx_object 0x%llx sq id %llu cq id %llu\n", err,
+ qp->tx_object, qp->sq_id, send_cq->id);
+
+ resp.sqid = qp->sq_id;
+ resp.cqid = send_cq->id;
+ resp.tx_vp_offset = pd->tx_vp_offset;
+
+ err = ib_copy_to_udata(udata, &resp, sizeof(resp));
+ if (err) {
+ ibdev_dbg(&mdev->ib_dev,
+ "Failed copy udata for create qp-raw, %d\n",
+ err);
+ goto err_destroy_wq_obj;
+ }
+
+ return 0;
+
+err_destroy_wq_obj:
+ mana_destroy_wq_obj(mpc, GDMA_SQ, qp->tx_object);
+
+err_destroy_dma_region:
+ mana_ib_gd_destroy_dma_region(mdev, qp->sq_gdma_region);
+
+err_release_umem:
+ ib_umem_release(umem);
+
+err_free_vport:
+ mana_ib_uncfg_vport(mdev, pd, port - 1);
+
+ return err;
+}
+
+int mana_ib_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *attr,
+ struct ib_udata *udata)
+{
+ switch (attr->qp_type) {
+ case IB_QPT_RAW_PACKET:
+ /* When rwq_ind_tbl is used, it's for creating WQs for RSS */
+ if (attr->rwq_ind_tbl)
+ return mana_ib_create_qp_rss(ibqp, ibqp->pd, attr,
+ udata);
+
+ return mana_ib_create_qp_raw(ibqp, ibqp->pd, attr, udata);
+ default:
+ /* Creating QP other than IB_QPT_RAW_PACKET is not supported */
+ ibdev_dbg(ibqp->device, "Creating QP type %u not supported\n",
+ attr->qp_type);
+ }
+
+ return -EINVAL;
+}
+
+int mana_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+ int attr_mask, struct ib_udata *udata)
+{
+ /* modify_qp is not supported by this version of the driver */
+ return -EOPNOTSUPP;
+}
+
+static int mana_ib_destroy_qp_rss(struct mana_ib_qp *qp,
+ struct ib_rwq_ind_table *ind_tbl,
+ struct ib_udata *udata)
+{
+ struct mana_ib_dev *mdev =
+ container_of(qp->ibqp.device, struct mana_ib_dev, ib_dev);
+ struct gdma_dev *gd = mdev->gdma_dev;
+ struct mana_port_context *mpc;
+ struct mana_context *mc;
+ struct net_device *ndev;
+ struct mana_ib_wq *wq;
+ struct ib_wq *ibwq;
+ int i;
+
+ mc = gd->driver_data;
+ ndev = mc->ports[qp->port - 1];
+ mpc = netdev_priv(ndev);
+
+ for (i = 0; i < (1 << ind_tbl->log_ind_tbl_size); i++) {
+ ibwq = ind_tbl->ind_tbl[i];
+ wq = container_of(ibwq, struct mana_ib_wq, ibwq);
+ ibdev_dbg(&mdev->ib_dev, "destroying wq->rx_object %llu\n",
+ wq->rx_object);
+ mana_destroy_wq_obj(mpc, GDMA_RQ, wq->rx_object);
+ }
+
+ return 0;
+}
+
+static int mana_ib_destroy_qp_raw(struct mana_ib_qp *qp, struct ib_udata *udata)
+{
+ struct mana_ib_dev *mdev =
+ container_of(qp->ibqp.device, struct mana_ib_dev, ib_dev);
+ struct gdma_dev *gd = mdev->gdma_dev;
+ struct ib_pd *ibpd = qp->ibqp.pd;
+ struct mana_port_context *mpc;
+ struct mana_context *mc;
+ struct net_device *ndev;
+ struct mana_ib_pd *pd;
+
+ mc = gd->driver_data;
+ ndev = mc->ports[qp->port - 1];
+ mpc = netdev_priv(ndev);
+ pd = container_of(ibpd, struct mana_ib_pd, ibpd);
+
+ mana_destroy_wq_obj(mpc, GDMA_SQ, qp->tx_object);
+
+ if (qp->sq_umem) {
+ mana_ib_gd_destroy_dma_region(mdev, qp->sq_gdma_region);
+ ib_umem_release(qp->sq_umem);
+ }
+
+ mana_ib_uncfg_vport(mdev, pd, qp->port - 1);
+
+ return 0;
+}
+
+int mana_ib_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
+{
+ struct mana_ib_qp *qp = container_of(ibqp, struct mana_ib_qp, ibqp);
+
+ switch (ibqp->qp_type) {
+ case IB_QPT_RAW_PACKET:
+ if (ibqp->rwq_ind_tbl)
+ return mana_ib_destroy_qp_rss(qp, ibqp->rwq_ind_tbl,
+ udata);
+
+ return mana_ib_destroy_qp_raw(qp, udata);
+
+ default:
+ ibdev_dbg(ibqp->device, "Unexpected QP type %u\n",
+ ibqp->qp_type);
+ }
+
+ return -ENOENT;
+}