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-rw-r--r--drivers/infiniband/hw/ocrdma/ocrdma_main.c478
1 files changed, 478 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_main.c b/drivers/infiniband/hw/ocrdma/ocrdma_main.c
new file mode 100644
index 000000000..7832ee3e0
--- /dev/null
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_main.c
@@ -0,0 +1,478 @@
+/* This file is part of the Emulex RoCE Device Driver for
+ * RoCE (RDMA over Converged Ethernet) adapters.
+ * Copyright (C) 2012-2015 Emulex. All rights reserved.
+ * EMULEX and SLI are trademarks of Emulex.
+ * www.emulex.com
+ *
+ * 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 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Contact Information:
+ * linux-drivers@emulex.com
+ *
+ * Emulex
+ * 3333 Susan Street
+ * Costa Mesa, CA 92626
+ */
+
+#include <linux/module.h>
+#include <linux/idr.h>
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_user_verbs.h>
+#include <rdma/ib_addr.h>
+#include <rdma/ib_mad.h>
+
+#include <linux/netdevice.h>
+#include <net/addrconf.h>
+
+#include "ocrdma.h"
+#include "ocrdma_verbs.h"
+#include "ocrdma_ah.h"
+#include "be_roce.h"
+#include "ocrdma_hw.h"
+#include "ocrdma_stats.h"
+#include <rdma/ocrdma-abi.h>
+
+MODULE_DESCRIPTION(OCRDMA_ROCE_DRV_DESC " " OCRDMA_ROCE_DRV_VERSION);
+MODULE_AUTHOR("Emulex Corporation");
+MODULE_LICENSE("Dual BSD/GPL");
+
+static DEFINE_IDR(ocrdma_dev_id);
+
+void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid)
+{
+ u8 mac_addr[6];
+
+ memcpy(&mac_addr[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
+ guid[0] = mac_addr[0] ^ 2;
+ guid[1] = mac_addr[1];
+ guid[2] = mac_addr[2];
+ guid[3] = 0xff;
+ guid[4] = 0xfe;
+ guid[5] = mac_addr[3];
+ guid[6] = mac_addr[4];
+ guid[7] = mac_addr[5];
+}
+static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device,
+ u8 port_num)
+{
+ return IB_LINK_LAYER_ETHERNET;
+}
+
+static int ocrdma_port_immutable(struct ib_device *ibdev, u8 port_num,
+ struct ib_port_immutable *immutable)
+{
+ struct ib_port_attr attr;
+ struct ocrdma_dev *dev;
+ int err;
+
+ dev = get_ocrdma_dev(ibdev);
+ immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE;
+ if (ocrdma_is_udp_encap_supported(dev))
+ immutable->core_cap_flags |= RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP;
+
+ err = ib_query_port(ibdev, port_num, &attr);
+ if (err)
+ return err;
+
+ immutable->pkey_tbl_len = attr.pkey_tbl_len;
+ immutable->gid_tbl_len = attr.gid_tbl_len;
+ immutable->max_mad_size = IB_MGMT_MAD_SIZE;
+
+ return 0;
+}
+
+static void get_dev_fw_str(struct ib_device *device, char *str)
+{
+ struct ocrdma_dev *dev = get_ocrdma_dev(device);
+
+ snprintf(str, IB_FW_VERSION_NAME_MAX, "%s", &dev->attr.fw_ver[0]);
+}
+
+static int ocrdma_register_device(struct ocrdma_dev *dev)
+{
+ strlcpy(dev->ibdev.name, "ocrdma%d", IB_DEVICE_NAME_MAX);
+ ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid);
+ BUILD_BUG_ON(sizeof(OCRDMA_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX);
+ memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC,
+ sizeof(OCRDMA_NODE_DESC));
+ dev->ibdev.owner = THIS_MODULE;
+ dev->ibdev.uverbs_abi_ver = OCRDMA_ABI_VERSION;
+ dev->ibdev.uverbs_cmd_mask =
+ OCRDMA_UVERBS(GET_CONTEXT) |
+ OCRDMA_UVERBS(QUERY_DEVICE) |
+ OCRDMA_UVERBS(QUERY_PORT) |
+ OCRDMA_UVERBS(ALLOC_PD) |
+ OCRDMA_UVERBS(DEALLOC_PD) |
+ OCRDMA_UVERBS(REG_MR) |
+ OCRDMA_UVERBS(DEREG_MR) |
+ OCRDMA_UVERBS(CREATE_COMP_CHANNEL) |
+ OCRDMA_UVERBS(CREATE_CQ) |
+ OCRDMA_UVERBS(RESIZE_CQ) |
+ OCRDMA_UVERBS(DESTROY_CQ) |
+ OCRDMA_UVERBS(REQ_NOTIFY_CQ) |
+ OCRDMA_UVERBS(CREATE_QP) |
+ OCRDMA_UVERBS(MODIFY_QP) |
+ OCRDMA_UVERBS(QUERY_QP) |
+ OCRDMA_UVERBS(DESTROY_QP) |
+ OCRDMA_UVERBS(POLL_CQ) |
+ OCRDMA_UVERBS(POST_SEND) |
+ OCRDMA_UVERBS(POST_RECV);
+
+ dev->ibdev.uverbs_cmd_mask |=
+ OCRDMA_UVERBS(CREATE_AH) |
+ OCRDMA_UVERBS(MODIFY_AH) |
+ OCRDMA_UVERBS(QUERY_AH) |
+ OCRDMA_UVERBS(DESTROY_AH);
+
+ dev->ibdev.node_type = RDMA_NODE_IB_CA;
+ dev->ibdev.phys_port_cnt = 1;
+ dev->ibdev.num_comp_vectors = dev->eq_cnt;
+
+ /* mandatory verbs. */
+ dev->ibdev.query_device = ocrdma_query_device;
+ dev->ibdev.query_port = ocrdma_query_port;
+ dev->ibdev.modify_port = ocrdma_modify_port;
+ dev->ibdev.get_netdev = ocrdma_get_netdev;
+ dev->ibdev.get_link_layer = ocrdma_link_layer;
+ dev->ibdev.alloc_pd = ocrdma_alloc_pd;
+ dev->ibdev.dealloc_pd = ocrdma_dealloc_pd;
+
+ dev->ibdev.create_cq = ocrdma_create_cq;
+ dev->ibdev.destroy_cq = ocrdma_destroy_cq;
+ dev->ibdev.resize_cq = ocrdma_resize_cq;
+
+ dev->ibdev.create_qp = ocrdma_create_qp;
+ dev->ibdev.modify_qp = ocrdma_modify_qp;
+ dev->ibdev.query_qp = ocrdma_query_qp;
+ dev->ibdev.destroy_qp = ocrdma_destroy_qp;
+
+ dev->ibdev.query_pkey = ocrdma_query_pkey;
+ dev->ibdev.create_ah = ocrdma_create_ah;
+ dev->ibdev.destroy_ah = ocrdma_destroy_ah;
+ dev->ibdev.query_ah = ocrdma_query_ah;
+
+ dev->ibdev.poll_cq = ocrdma_poll_cq;
+ dev->ibdev.post_send = ocrdma_post_send;
+ dev->ibdev.post_recv = ocrdma_post_recv;
+ dev->ibdev.req_notify_cq = ocrdma_arm_cq;
+
+ dev->ibdev.get_dma_mr = ocrdma_get_dma_mr;
+ dev->ibdev.dereg_mr = ocrdma_dereg_mr;
+ dev->ibdev.reg_user_mr = ocrdma_reg_user_mr;
+
+ dev->ibdev.alloc_mr = ocrdma_alloc_mr;
+ dev->ibdev.map_mr_sg = ocrdma_map_mr_sg;
+
+ /* mandatory to support user space verbs consumer. */
+ dev->ibdev.alloc_ucontext = ocrdma_alloc_ucontext;
+ dev->ibdev.dealloc_ucontext = ocrdma_dealloc_ucontext;
+ dev->ibdev.mmap = ocrdma_mmap;
+ dev->ibdev.dev.parent = &dev->nic_info.pdev->dev;
+
+ dev->ibdev.process_mad = ocrdma_process_mad;
+ dev->ibdev.get_port_immutable = ocrdma_port_immutable;
+ dev->ibdev.get_dev_fw_str = get_dev_fw_str;
+
+ if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
+ dev->ibdev.uverbs_cmd_mask |=
+ OCRDMA_UVERBS(CREATE_SRQ) |
+ OCRDMA_UVERBS(MODIFY_SRQ) |
+ OCRDMA_UVERBS(QUERY_SRQ) |
+ OCRDMA_UVERBS(DESTROY_SRQ) |
+ OCRDMA_UVERBS(POST_SRQ_RECV);
+
+ dev->ibdev.create_srq = ocrdma_create_srq;
+ dev->ibdev.modify_srq = ocrdma_modify_srq;
+ dev->ibdev.query_srq = ocrdma_query_srq;
+ dev->ibdev.destroy_srq = ocrdma_destroy_srq;
+ dev->ibdev.post_srq_recv = ocrdma_post_srq_recv;
+ }
+ dev->ibdev.driver_id = RDMA_DRIVER_OCRDMA;
+ return ib_register_device(&dev->ibdev, NULL);
+}
+
+static int ocrdma_alloc_resources(struct ocrdma_dev *dev)
+{
+ mutex_init(&dev->dev_lock);
+ dev->cq_tbl = kcalloc(OCRDMA_MAX_CQ, sizeof(struct ocrdma_cq *),
+ GFP_KERNEL);
+ if (!dev->cq_tbl)
+ goto alloc_err;
+
+ if (dev->attr.max_qp) {
+ dev->qp_tbl = kcalloc(OCRDMA_MAX_QP,
+ sizeof(struct ocrdma_qp *),
+ GFP_KERNEL);
+ if (!dev->qp_tbl)
+ goto alloc_err;
+ }
+
+ dev->stag_arr = kcalloc(OCRDMA_MAX_STAG, sizeof(u64), GFP_KERNEL);
+ if (dev->stag_arr == NULL)
+ goto alloc_err;
+
+ ocrdma_alloc_pd_pool(dev);
+
+ if (!ocrdma_alloc_stats_resources(dev)) {
+ pr_err("%s: stats resource allocation failed\n", __func__);
+ goto alloc_err;
+ }
+
+ spin_lock_init(&dev->av_tbl.lock);
+ spin_lock_init(&dev->flush_q_lock);
+ return 0;
+alloc_err:
+ pr_err("%s(%d) error.\n", __func__, dev->id);
+ return -ENOMEM;
+}
+
+static void ocrdma_free_resources(struct ocrdma_dev *dev)
+{
+ ocrdma_release_stats_resources(dev);
+ kfree(dev->stag_arr);
+ kfree(dev->qp_tbl);
+ kfree(dev->cq_tbl);
+}
+
+/* OCRDMA sysfs interface */
+static ssize_t show_rev(struct device *device, struct device_attribute *attr,
+ char *buf)
+{
+ struct ocrdma_dev *dev = dev_get_drvdata(device);
+
+ return scnprintf(buf, PAGE_SIZE, "0x%x\n", dev->nic_info.pdev->vendor);
+}
+
+static ssize_t show_hca_type(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct ocrdma_dev *dev = dev_get_drvdata(device);
+
+ return scnprintf(buf, PAGE_SIZE, "%s\n", &dev->model_number[0]);
+}
+
+static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
+static DEVICE_ATTR(hca_type, S_IRUGO, show_hca_type, NULL);
+
+static struct device_attribute *ocrdma_attributes[] = {
+ &dev_attr_hw_rev,
+ &dev_attr_hca_type
+};
+
+static void ocrdma_remove_sysfiles(struct ocrdma_dev *dev)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++)
+ device_remove_file(&dev->ibdev.dev, ocrdma_attributes[i]);
+}
+
+static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
+{
+ int status = 0, i;
+ u8 lstate = 0;
+ struct ocrdma_dev *dev;
+
+ dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev));
+ if (!dev) {
+ pr_err("Unable to allocate ib device\n");
+ return NULL;
+ }
+ dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL);
+ if (!dev->mbx_cmd)
+ goto idr_err;
+
+ memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
+ dev->id = idr_alloc(&ocrdma_dev_id, NULL, 0, 0, GFP_KERNEL);
+ if (dev->id < 0)
+ goto idr_err;
+
+ status = ocrdma_init_hw(dev);
+ if (status)
+ goto init_err;
+
+ status = ocrdma_alloc_resources(dev);
+ if (status)
+ goto alloc_err;
+
+ ocrdma_init_service_level(dev);
+ status = ocrdma_register_device(dev);
+ if (status)
+ goto alloc_err;
+
+ /* Query Link state and update */
+ status = ocrdma_mbx_get_link_speed(dev, NULL, &lstate);
+ if (!status)
+ ocrdma_update_link_state(dev, lstate);
+
+ for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++)
+ if (device_create_file(&dev->ibdev.dev, ocrdma_attributes[i]))
+ goto sysfs_err;
+ /* Init stats */
+ ocrdma_add_port_stats(dev);
+ /* Interrupt Moderation */
+ INIT_DELAYED_WORK(&dev->eqd_work, ocrdma_eqd_set_task);
+ schedule_delayed_work(&dev->eqd_work, msecs_to_jiffies(1000));
+
+ pr_info("%s %s: %s \"%s\" port %d\n",
+ dev_name(&dev->nic_info.pdev->dev), hca_name(dev),
+ port_speed_string(dev), dev->model_number,
+ dev->hba_port_num);
+ pr_info("%s ocrdma%d driver loaded successfully\n",
+ dev_name(&dev->nic_info.pdev->dev), dev->id);
+ return dev;
+
+sysfs_err:
+ ocrdma_remove_sysfiles(dev);
+alloc_err:
+ ocrdma_free_resources(dev);
+ ocrdma_cleanup_hw(dev);
+init_err:
+ idr_remove(&ocrdma_dev_id, dev->id);
+idr_err:
+ kfree(dev->mbx_cmd);
+ ib_dealloc_device(&dev->ibdev);
+ pr_err("%s() leaving. ret=%d\n", __func__, status);
+ return NULL;
+}
+
+static void ocrdma_remove_free(struct ocrdma_dev *dev)
+{
+
+ idr_remove(&ocrdma_dev_id, dev->id);
+ kfree(dev->mbx_cmd);
+ ib_dealloc_device(&dev->ibdev);
+}
+
+static void ocrdma_remove(struct ocrdma_dev *dev)
+{
+ /* first unregister with stack to stop all the active traffic
+ * of the registered clients.
+ */
+ cancel_delayed_work_sync(&dev->eqd_work);
+ ocrdma_remove_sysfiles(dev);
+ ib_unregister_device(&dev->ibdev);
+
+ ocrdma_rem_port_stats(dev);
+ ocrdma_free_resources(dev);
+ ocrdma_cleanup_hw(dev);
+ ocrdma_remove_free(dev);
+}
+
+static int ocrdma_dispatch_port_active(struct ocrdma_dev *dev)
+{
+ struct ib_event port_event;
+
+ port_event.event = IB_EVENT_PORT_ACTIVE;
+ port_event.element.port_num = 1;
+ port_event.device = &dev->ibdev;
+ ib_dispatch_event(&port_event);
+ return 0;
+}
+
+static int ocrdma_dispatch_port_error(struct ocrdma_dev *dev)
+{
+ struct ib_event err_event;
+
+ err_event.event = IB_EVENT_PORT_ERR;
+ err_event.element.port_num = 1;
+ err_event.device = &dev->ibdev;
+ ib_dispatch_event(&err_event);
+ return 0;
+}
+
+static void ocrdma_shutdown(struct ocrdma_dev *dev)
+{
+ ocrdma_dispatch_port_error(dev);
+ ocrdma_remove(dev);
+}
+
+/* event handling via NIC driver ensures that all the NIC specific
+ * initialization done before RoCE driver notifies
+ * event to stack.
+ */
+static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event)
+{
+ switch (event) {
+ case BE_DEV_SHUTDOWN:
+ ocrdma_shutdown(dev);
+ break;
+ default:
+ break;
+ }
+}
+
+void ocrdma_update_link_state(struct ocrdma_dev *dev, u8 lstate)
+{
+ if (!(dev->flags & OCRDMA_FLAGS_LINK_STATUS_INIT)) {
+ dev->flags |= OCRDMA_FLAGS_LINK_STATUS_INIT;
+ if (!lstate)
+ return;
+ }
+
+ if (!lstate)
+ ocrdma_dispatch_port_error(dev);
+ else
+ ocrdma_dispatch_port_active(dev);
+}
+
+static struct ocrdma_driver ocrdma_drv = {
+ .name = "ocrdma_driver",
+ .add = ocrdma_add,
+ .remove = ocrdma_remove,
+ .state_change_handler = ocrdma_event_handler,
+ .be_abi_version = OCRDMA_BE_ROCE_ABI_VERSION,
+};
+
+static int __init ocrdma_init_module(void)
+{
+ int status;
+
+ ocrdma_init_debugfs();
+
+ status = be_roce_register_driver(&ocrdma_drv);
+ if (status)
+ goto err_be_reg;
+
+ return 0;
+
+err_be_reg:
+
+ return status;
+}
+
+static void __exit ocrdma_exit_module(void)
+{
+ be_roce_unregister_driver(&ocrdma_drv);
+ ocrdma_rem_debugfs();
+ idr_destroy(&ocrdma_dev_id);
+}
+
+module_init(ocrdma_init_module);
+module_exit(ocrdma_exit_module);