RDMA/cxgb4: Add driver for Chelsio T4 RNIC
Add an RDMA/iWARP driver for Chelsio T4 Ethernet adapters.
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/cxgb4/provider.c b/drivers/infiniband/hw/cxgb4/provider.c
new file mode 100644
index 0000000..3cb50af
--- /dev/null
+++ b/drivers/infiniband/hw/cxgb4/provider.c
@@ -0,0 +1,518 @@
+/*
+ * Copyright (c) 2009-2010 Chelsio, Inc. 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.
+ */
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/ethtool.h>
+#include <linux/rtnetlink.h>
+#include <linux/inetdevice.h>
+#include <linux/io.h>
+
+#include <asm/irq.h>
+#include <asm/byteorder.h>
+
+#include <rdma/iw_cm.h>
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_smi.h>
+#include <rdma/ib_umem.h>
+#include <rdma/ib_user_verbs.h>
+
+#include "iw_cxgb4.h"
+
+static int fastreg_support;
+module_param(fastreg_support, int, 0644);
+MODULE_PARM_DESC(fastreg_support, "Advertise fastreg support (default=0)");
+
+static int c4iw_modify_port(struct ib_device *ibdev,
+ u8 port, int port_modify_mask,
+ struct ib_port_modify *props)
+{
+ return -ENOSYS;
+}
+
+static struct ib_ah *c4iw_ah_create(struct ib_pd *pd,
+ struct ib_ah_attr *ah_attr)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static int c4iw_ah_destroy(struct ib_ah *ah)
+{
+ return -ENOSYS;
+}
+
+static int c4iw_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
+{
+ return -ENOSYS;
+}
+
+static int c4iw_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
+{
+ return -ENOSYS;
+}
+
+static int c4iw_process_mad(struct ib_device *ibdev, int mad_flags,
+ u8 port_num, struct ib_wc *in_wc,
+ struct ib_grh *in_grh, struct ib_mad *in_mad,
+ struct ib_mad *out_mad)
+{
+ return -ENOSYS;
+}
+
+static int c4iw_dealloc_ucontext(struct ib_ucontext *context)
+{
+ struct c4iw_dev *rhp = to_c4iw_dev(context->device);
+ struct c4iw_ucontext *ucontext = to_c4iw_ucontext(context);
+ struct c4iw_mm_entry *mm, *tmp;
+
+ PDBG("%s context %p\n", __func__, context);
+ list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry)
+ kfree(mm);
+ c4iw_release_dev_ucontext(&rhp->rdev, &ucontext->uctx);
+ kfree(ucontext);
+ return 0;
+}
+
+static struct ib_ucontext *c4iw_alloc_ucontext(struct ib_device *ibdev,
+ struct ib_udata *udata)
+{
+ struct c4iw_ucontext *context;
+ struct c4iw_dev *rhp = to_c4iw_dev(ibdev);
+
+ PDBG("%s ibdev %p\n", __func__, ibdev);
+ context = kzalloc(sizeof(*context), GFP_KERNEL);
+ if (!context)
+ return ERR_PTR(-ENOMEM);
+ c4iw_init_dev_ucontext(&rhp->rdev, &context->uctx);
+ INIT_LIST_HEAD(&context->mmaps);
+ spin_lock_init(&context->mmap_lock);
+ return &context->ibucontext;
+}
+
+static int c4iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
+{
+ int len = vma->vm_end - vma->vm_start;
+ u32 key = vma->vm_pgoff << PAGE_SHIFT;
+ struct c4iw_rdev *rdev;
+ int ret = 0;
+ struct c4iw_mm_entry *mm;
+ struct c4iw_ucontext *ucontext;
+ u64 addr;
+
+ PDBG("%s pgoff 0x%lx key 0x%x len %d\n", __func__, vma->vm_pgoff,
+ key, len);
+
+ if (vma->vm_start & (PAGE_SIZE-1))
+ return -EINVAL;
+
+ rdev = &(to_c4iw_dev(context->device)->rdev);
+ ucontext = to_c4iw_ucontext(context);
+
+ mm = remove_mmap(ucontext, key, len);
+ if (!mm)
+ return -EINVAL;
+ addr = mm->addr;
+ kfree(mm);
+
+ if ((addr >= pci_resource_start(rdev->lldi.pdev, 2)) &&
+ (addr < (pci_resource_start(rdev->lldi.pdev, 2) +
+ pci_resource_len(rdev->lldi.pdev, 2)))) {
+
+ /*
+ * Map T4 DB register.
+ */
+ if (vma->vm_flags & VM_READ)
+ return -EPERM;
+
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+ vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND;
+ vma->vm_flags &= ~VM_MAYREAD;
+ ret = io_remap_pfn_range(vma, vma->vm_start,
+ addr >> PAGE_SHIFT,
+ len, vma->vm_page_prot);
+ } else {
+
+ /*
+ * Map WQ or CQ contig dma memory...
+ */
+ ret = remap_pfn_range(vma, vma->vm_start,
+ addr >> PAGE_SHIFT,
+ len, vma->vm_page_prot);
+ }
+
+ return ret;
+}
+
+static int c4iw_deallocate_pd(struct ib_pd *pd)
+{
+ struct c4iw_dev *rhp;
+ struct c4iw_pd *php;
+
+ php = to_c4iw_pd(pd);
+ rhp = php->rhp;
+ PDBG("%s ibpd %p pdid 0x%x\n", __func__, pd, php->pdid);
+ c4iw_put_resource(&rhp->rdev.resource.pdid_fifo, php->pdid,
+ &rhp->rdev.resource.pdid_fifo_lock);
+ kfree(php);
+ return 0;
+}
+
+static struct ib_pd *c4iw_allocate_pd(struct ib_device *ibdev,
+ struct ib_ucontext *context,
+ struct ib_udata *udata)
+{
+ struct c4iw_pd *php;
+ u32 pdid;
+ struct c4iw_dev *rhp;
+
+ PDBG("%s ibdev %p\n", __func__, ibdev);
+ rhp = (struct c4iw_dev *) ibdev;
+ pdid = c4iw_get_resource(&rhp->rdev.resource.pdid_fifo,
+ &rhp->rdev.resource.pdid_fifo_lock);
+ if (!pdid)
+ return ERR_PTR(-EINVAL);
+ php = kzalloc(sizeof(*php), GFP_KERNEL);
+ if (!php) {
+ c4iw_put_resource(&rhp->rdev.resource.pdid_fifo, pdid,
+ &rhp->rdev.resource.pdid_fifo_lock);
+ return ERR_PTR(-ENOMEM);
+ }
+ php->pdid = pdid;
+ php->rhp = rhp;
+ if (context) {
+ if (ib_copy_to_udata(udata, &php->pdid, sizeof(u32))) {
+ c4iw_deallocate_pd(&php->ibpd);
+ return ERR_PTR(-EFAULT);
+ }
+ }
+ PDBG("%s pdid 0x%0x ptr 0x%p\n", __func__, pdid, php);
+ return &php->ibpd;
+}
+
+static int c4iw_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
+ u16 *pkey)
+{
+ PDBG("%s ibdev %p\n", __func__, ibdev);
+ *pkey = 0;
+ return 0;
+}
+
+static int c4iw_query_gid(struct ib_device *ibdev, u8 port, int index,
+ union ib_gid *gid)
+{
+ struct c4iw_dev *dev;
+
+ PDBG("%s ibdev %p, port %d, index %d, gid %p\n",
+ __func__, ibdev, port, index, gid);
+ dev = to_c4iw_dev(ibdev);
+ BUG_ON(port == 0);
+ memset(&(gid->raw[0]), 0, sizeof(gid->raw));
+ memcpy(&(gid->raw[0]), dev->rdev.lldi.ports[port-1]->dev_addr, 6);
+ return 0;
+}
+
+static int c4iw_query_device(struct ib_device *ibdev,
+ struct ib_device_attr *props)
+{
+
+ struct c4iw_dev *dev;
+ PDBG("%s ibdev %p\n", __func__, ibdev);
+
+ dev = to_c4iw_dev(ibdev);
+ memset(props, 0, sizeof *props);
+ memcpy(&props->sys_image_guid, dev->rdev.lldi.ports[0]->dev_addr, 6);
+ props->hw_ver = dev->rdev.lldi.adapter_type;
+ props->fw_ver = dev->rdev.lldi.fw_vers;
+ props->device_cap_flags = dev->device_cap_flags;
+ props->page_size_cap = T4_PAGESIZE_MASK;
+ props->vendor_id = (u32)dev->rdev.lldi.pdev->vendor;
+ props->vendor_part_id = (u32)dev->rdev.lldi.pdev->device;
+ props->max_mr_size = T4_MAX_MR_SIZE;
+ props->max_qp = T4_MAX_NUM_QP;
+ props->max_qp_wr = T4_MAX_QP_DEPTH;
+ props->max_sge = T4_MAX_RECV_SGE;
+ props->max_sge_rd = 1;
+ props->max_qp_rd_atom = T4_MAX_READ_DEPTH;
+ props->max_qp_init_rd_atom = T4_MAX_READ_DEPTH;
+ props->max_cq = T4_MAX_NUM_CQ;
+ props->max_cqe = T4_MAX_CQ_DEPTH;
+ props->max_mr = c4iw_num_stags(&dev->rdev);
+ props->max_pd = T4_MAX_NUM_PD;
+ props->local_ca_ack_delay = 0;
+ props->max_fast_reg_page_list_len = T4_MAX_FR_DEPTH;
+
+ return 0;
+}
+
+static int c4iw_query_port(struct ib_device *ibdev, u8 port,
+ struct ib_port_attr *props)
+{
+ struct c4iw_dev *dev;
+ struct net_device *netdev;
+ struct in_device *inetdev;
+
+ PDBG("%s ibdev %p\n", __func__, ibdev);
+
+ dev = to_c4iw_dev(ibdev);
+ netdev = dev->rdev.lldi.ports[port-1];
+
+ memset(props, 0, sizeof(struct ib_port_attr));
+ props->max_mtu = IB_MTU_4096;
+ if (netdev->mtu >= 4096)
+ props->active_mtu = IB_MTU_4096;
+ else if (netdev->mtu >= 2048)
+ props->active_mtu = IB_MTU_2048;
+ else if (netdev->mtu >= 1024)
+ props->active_mtu = IB_MTU_1024;
+ else if (netdev->mtu >= 512)
+ props->active_mtu = IB_MTU_512;
+ else
+ props->active_mtu = IB_MTU_256;
+
+ if (!netif_carrier_ok(netdev))
+ props->state = IB_PORT_DOWN;
+ else {
+ inetdev = in_dev_get(netdev);
+ if (inetdev) {
+ if (inetdev->ifa_list)
+ props->state = IB_PORT_ACTIVE;
+ else
+ props->state = IB_PORT_INIT;
+ in_dev_put(inetdev);
+ } else
+ props->state = IB_PORT_INIT;
+ }
+
+ props->port_cap_flags =
+ IB_PORT_CM_SUP |
+ IB_PORT_SNMP_TUNNEL_SUP |
+ IB_PORT_REINIT_SUP |
+ IB_PORT_DEVICE_MGMT_SUP |
+ IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
+ props->gid_tbl_len = 1;
+ props->pkey_tbl_len = 1;
+ props->active_width = 2;
+ props->active_speed = 2;
+ props->max_msg_sz = -1;
+
+ return 0;
+}
+
+static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
+ ibdev.dev);
+ PDBG("%s dev 0x%p\n", __func__, dev);
+ return sprintf(buf, "%d\n", c4iw_dev->rdev.lldi.adapter_type);
+}
+
+static ssize_t show_fw_ver(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
+ ibdev.dev);
+ PDBG("%s dev 0x%p\n", __func__, dev);
+
+ return sprintf(buf, "%u.%u.%u.%u\n",
+ FW_HDR_FW_VER_MAJOR_GET(c4iw_dev->rdev.lldi.fw_vers),
+ FW_HDR_FW_VER_MINOR_GET(c4iw_dev->rdev.lldi.fw_vers),
+ FW_HDR_FW_VER_MICRO_GET(c4iw_dev->rdev.lldi.fw_vers),
+ FW_HDR_FW_VER_BUILD_GET(c4iw_dev->rdev.lldi.fw_vers));
+}
+
+static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
+ ibdev.dev);
+ struct ethtool_drvinfo info;
+ struct net_device *lldev = c4iw_dev->rdev.lldi.ports[0];
+
+ PDBG("%s dev 0x%p\n", __func__, dev);
+ lldev->ethtool_ops->get_drvinfo(lldev, &info);
+ return sprintf(buf, "%s\n", info.driver);
+}
+
+static ssize_t show_board(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
+ ibdev.dev);
+ PDBG("%s dev 0x%p\n", __func__, dev);
+ return sprintf(buf, "%x.%x\n", c4iw_dev->rdev.lldi.pdev->vendor,
+ c4iw_dev->rdev.lldi.pdev->device);
+}
+
+static int c4iw_get_mib(struct ib_device *ibdev,
+ union rdma_protocol_stats *stats)
+{
+ return -ENOSYS;
+}
+
+static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
+static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
+static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
+static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
+
+static struct device_attribute *c4iw_class_attributes[] = {
+ &dev_attr_hw_rev,
+ &dev_attr_fw_ver,
+ &dev_attr_hca_type,
+ &dev_attr_board_id,
+};
+
+int c4iw_register_device(struct c4iw_dev *dev)
+{
+ int ret;
+ int i;
+
+ PDBG("%s c4iw_dev %p\n", __func__, dev);
+ BUG_ON(!dev->rdev.lldi.ports[0]);
+ strlcpy(dev->ibdev.name, "cxgb4_%d", IB_DEVICE_NAME_MAX);
+ memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
+ memcpy(&dev->ibdev.node_guid, dev->rdev.lldi.ports[0]->dev_addr, 6);
+ dev->ibdev.owner = THIS_MODULE;
+ dev->device_cap_flags = IB_DEVICE_LOCAL_DMA_LKEY | IB_DEVICE_MEM_WINDOW;
+ if (fastreg_support)
+ dev->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
+ dev->ibdev.local_dma_lkey = 0;
+ dev->ibdev.uverbs_cmd_mask =
+ (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
+ (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
+ (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
+ (1ull << IB_USER_VERBS_CMD_REG_MR) |
+ (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
+ (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
+ (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
+ (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
+ (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
+ (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
+ (1ull << IB_USER_VERBS_CMD_POST_SEND) |
+ (1ull << IB_USER_VERBS_CMD_POST_RECV);
+ dev->ibdev.node_type = RDMA_NODE_RNIC;
+ memcpy(dev->ibdev.node_desc, C4IW_NODE_DESC, sizeof(C4IW_NODE_DESC));
+ dev->ibdev.phys_port_cnt = dev->rdev.lldi.nports;
+ dev->ibdev.num_comp_vectors = 1;
+ dev->ibdev.dma_device = &(dev->rdev.lldi.pdev->dev);
+ dev->ibdev.query_device = c4iw_query_device;
+ dev->ibdev.query_port = c4iw_query_port;
+ dev->ibdev.modify_port = c4iw_modify_port;
+ dev->ibdev.query_pkey = c4iw_query_pkey;
+ dev->ibdev.query_gid = c4iw_query_gid;
+ dev->ibdev.alloc_ucontext = c4iw_alloc_ucontext;
+ dev->ibdev.dealloc_ucontext = c4iw_dealloc_ucontext;
+ dev->ibdev.mmap = c4iw_mmap;
+ dev->ibdev.alloc_pd = c4iw_allocate_pd;
+ dev->ibdev.dealloc_pd = c4iw_deallocate_pd;
+ dev->ibdev.create_ah = c4iw_ah_create;
+ dev->ibdev.destroy_ah = c4iw_ah_destroy;
+ dev->ibdev.create_qp = c4iw_create_qp;
+ dev->ibdev.modify_qp = c4iw_ib_modify_qp;
+ dev->ibdev.destroy_qp = c4iw_destroy_qp;
+ dev->ibdev.create_cq = c4iw_create_cq;
+ dev->ibdev.destroy_cq = c4iw_destroy_cq;
+ dev->ibdev.resize_cq = c4iw_resize_cq;
+ dev->ibdev.poll_cq = c4iw_poll_cq;
+ dev->ibdev.get_dma_mr = c4iw_get_dma_mr;
+ dev->ibdev.reg_phys_mr = c4iw_register_phys_mem;
+ dev->ibdev.rereg_phys_mr = c4iw_reregister_phys_mem;
+ dev->ibdev.reg_user_mr = c4iw_reg_user_mr;
+ dev->ibdev.dereg_mr = c4iw_dereg_mr;
+ dev->ibdev.alloc_mw = c4iw_alloc_mw;
+ dev->ibdev.bind_mw = c4iw_bind_mw;
+ dev->ibdev.dealloc_mw = c4iw_dealloc_mw;
+ dev->ibdev.alloc_fast_reg_mr = c4iw_alloc_fast_reg_mr;
+ dev->ibdev.alloc_fast_reg_page_list = c4iw_alloc_fastreg_pbl;
+ dev->ibdev.free_fast_reg_page_list = c4iw_free_fastreg_pbl;
+ dev->ibdev.attach_mcast = c4iw_multicast_attach;
+ dev->ibdev.detach_mcast = c4iw_multicast_detach;
+ dev->ibdev.process_mad = c4iw_process_mad;
+ dev->ibdev.req_notify_cq = c4iw_arm_cq;
+ dev->ibdev.post_send = c4iw_post_send;
+ dev->ibdev.post_recv = c4iw_post_receive;
+ dev->ibdev.get_protocol_stats = c4iw_get_mib;
+
+ dev->ibdev.iwcm = kmalloc(sizeof(struct iw_cm_verbs), GFP_KERNEL);
+ if (!dev->ibdev.iwcm)
+ return -ENOMEM;
+
+ dev->ibdev.iwcm->connect = c4iw_connect;
+ dev->ibdev.iwcm->accept = c4iw_accept_cr;
+ dev->ibdev.iwcm->reject = c4iw_reject_cr;
+ dev->ibdev.iwcm->create_listen = c4iw_create_listen;
+ dev->ibdev.iwcm->destroy_listen = c4iw_destroy_listen;
+ dev->ibdev.iwcm->add_ref = c4iw_qp_add_ref;
+ dev->ibdev.iwcm->rem_ref = c4iw_qp_rem_ref;
+ dev->ibdev.iwcm->get_qp = c4iw_get_qp;
+
+ ret = ib_register_device(&dev->ibdev);
+ if (ret)
+ goto bail1;
+
+ for (i = 0; i < ARRAY_SIZE(c4iw_class_attributes); ++i) {
+ ret = device_create_file(&dev->ibdev.dev,
+ c4iw_class_attributes[i]);
+ if (ret)
+ goto bail2;
+ }
+ return 0;
+bail2:
+ ib_unregister_device(&dev->ibdev);
+bail1:
+ kfree(dev->ibdev.iwcm);
+ return ret;
+}
+
+void c4iw_unregister_device(struct c4iw_dev *dev)
+{
+ int i;
+
+ PDBG("%s c4iw_dev %p\n", __func__, dev);
+ for (i = 0; i < ARRAY_SIZE(c4iw_class_attributes); ++i)
+ device_remove_file(&dev->ibdev.dev,
+ c4iw_class_attributes[i]);
+ ib_unregister_device(&dev->ibdev);
+ kfree(dev->ibdev.iwcm);
+ return;
+}