[PATCH 12/14] RDMA/ionic: Register device ops for miscellaneous functionality

Abhijit Gangurde
2025-04-23T10:32:10Z

Implement idbdev ops for device and port information.

Co-developed-by: Andrew Boyer <andrew.boyer@amd.com>
Signed-off-by: Andrew Boyer <andrew.boyer@amd.com>
Co-developed-by: Allen Hubbe <allen.hubbe@amd.com>
Signed-off-by: Allen Hubbe <allen.hubbe@amd.com>
Signed-off-by: Abhijit Gangurde <abhijit.gangurde@amd.com>
---
drivers/infiniband/hw/ionic/ionic_ibdev.c | 236 ++++++++++++++++++++++
drivers/infiniband/hw/ionic/ionic_ibdev.h | 5 +
2 files changed, 241 insertions(+)

diff --git a/drivers/infiniband/hw/ionic/ionic_ibdev.c b/drivers/infiniband/hw/ionic/ionic_ibdev.c
index e6e3eee6760b..731d280a301b 100644
--- a/drivers/infiniband/hw/ionic/ionic_ibdev.c
+++ b/drivers/infiniband/hw/ionic/ionic_ibdev.c
@@ -3,7 +3,11 @@

#include <linux/module.h>
#include <linux/printk.h>
+#include <linux/pci.h>
+#include <linux/irq.h>
#include <net/addrconf.h>
+#include <rdma/ib_addr.h>
+#include <rdma/ib_mad.h>

#include "ionic_ibdev.h"

@@ -35,6 +39,230 @@ void ionic_port_event(struct ionic_ibdev *dev, enum ib_event_type event)
ib_dispatch_event(&ev);
}

+static int ionic_query_device(struct ib_device *ibdev,
+ struct ib_device_attr *attr,
+ struct ib_udata *udata)
+{
+ struct ionic_ibdev *dev = to_ionic_ibdev(ibdev);
+
+ addrconf_ifid_eui48((u8 *)&attr->sys_image_guid, dev->ndev);
+ attr->max_mr_size =
+ le32_to_cpu(dev->ident->rdma.npts_per_lif) * PAGE_SIZE / 2;
+ attr->page_size_cap = dev->page_size_supported;
+
+ attr->vendor_id = to_pci_dev(dev->hwdev)->vendor;
+ attr->vendor_part_id = to_pci_dev(dev->hwdev)->device;
+
+ attr->hw_ver = dev->info->asic_rev;
+ attr->fw_ver = 0;
+ attr->max_qp = dev->size_qpid;
+ attr->max_qp_wr = IONIC_MAX_DEPTH;
+ attr->device_cap_flags =
+ IB_DEVICE_MEM_WINDOW |
+ IB_DEVICE_MEM_MGT_EXTENSIONS |
+ IB_DEVICE_MEM_WINDOW_TYPE_2B |
+ 0;
+ attr->kernel_cap_flags = IBK_LOCAL_DMA_LKEY;
+ attr->max_send_sge =
+ min(ionic_v1_send_wqe_max_sge(dev->max_stride, 0, false),
+ IONIC_SPEC_HIGH);
+ attr->max_recv_sge =
+ min(ionic_v1_recv_wqe_max_sge(dev->max_stride, 0, false),
+ IONIC_SPEC_HIGH);
+ attr->max_sge_rd = attr->max_send_sge;
+ attr->max_cq = dev->inuse_cqid.inuse_size / dev->udma_count;
+ attr->max_cqe = IONIC_MAX_CQ_DEPTH - IONIC_CQ_GRACE;
+ attr->max_mr = dev->inuse_mrid.inuse_size;
+ attr->max_pd = IONIC_MAX_PD;
+ attr->max_qp_rd_atom = IONIC_MAX_RD_ATOM;
+ attr->max_ee_rd_atom = 0;
+ attr->max_res_rd_atom = IONIC_MAX_RD_ATOM;
+ attr->max_qp_init_rd_atom = IONIC_MAX_RD_ATOM;
+ attr->max_ee_init_rd_atom = 0;
+ attr->atomic_cap = IB_ATOMIC_GLOB;
+ attr->masked_atomic_cap = IB_ATOMIC_GLOB;
+ attr->max_mw = dev->inuse_mrid.inuse_size;
+ attr->max_mcast_grp = 0;
+ attr->max_mcast_qp_attach = 0;
+ attr->max_ah = dev->inuse_ahid.inuse_size;
+ attr->max_fast_reg_page_list_len =
+ le32_to_cpu(dev->ident->rdma.npts_per_lif) / 2;
+ attr->max_pkeys = IONIC_PKEY_TBL_LEN;
+
+ return 0;
+}
+
+static int ionic_query_port(struct ib_device *ibdev, u32 port,
+ struct ib_port_attr *attr)
+{
+ struct ionic_ibdev *dev = to_ionic_ibdev(ibdev);
+ struct net_device *ndev = dev->ndev;
+
+ if (port != 1)
+ return -EINVAL;
+
+ if (netif_running(ndev) && netif_carrier_ok(ndev)) {
+ attr->state = IB_PORT_ACTIVE;
+ attr->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
+ } else if (netif_running(ndev)) {
+ attr->state = IB_PORT_DOWN;
+ attr->phys_state = IB_PORT_PHYS_STATE_POLLING;
+ } else {
+ attr->state = IB_PORT_DOWN;
+ attr->phys_state = IB_PORT_PHYS_STATE_DISABLED;
+ }
+
+ attr->max_mtu = iboe_get_mtu(ndev->max_mtu);
+ attr->active_mtu = min(attr->max_mtu, iboe_get_mtu(ndev->mtu));
+ attr->gid_tbl_len = IONIC_GID_TBL_LEN;
+ attr->ip_gids = true;
+ attr->port_cap_flags = 0;
+ attr->max_msg_sz = 0x80000000;
+ attr->pkey_tbl_len = IONIC_PKEY_TBL_LEN;
+ attr->max_vl_num = 1;
+ attr->subnet_prefix = 0xfe80000000000000ull;
+
+ return ib_get_eth_speed(ibdev, port,
+ &attr->active_speed,
+ &attr->active_width);
+}
+
+static enum rdma_link_layer ionic_get_link_layer(struct ib_device *ibdev,
+ u32 port)
+{
+ return IB_LINK_LAYER_ETHERNET;
+}
+
+static struct net_device *ionic_get_netdev(struct ib_device *ibdev, u32 port)
+{
+ struct ionic_ibdev *dev = to_ionic_ibdev(ibdev);
+
+ if (port != 1)
+ return ERR_PTR(-EINVAL);
+
+ dev_hold(dev->ndev);
+
+ return dev->ndev;
+}
+
+static int ionic_query_pkey(struct ib_device *ibdev, u32 port, u16 index,
+ u16 *pkey)
+{
+ if (port != 1)
+ return -EINVAL;
+
+ if (index != 0)
+ return -EINVAL;
+
+ *pkey = IB_DEFAULT_PKEY_FULL;
+
+ return 0;
+}
+
+static int ionic_modify_device(struct ib_device *ibdev, int mask,
+ struct ib_device_modify *attr)
+{
+ struct ionic_ibdev *dev = to_ionic_ibdev(ibdev);
+
+ if (mask & ~IB_DEVICE_MODIFY_NODE_DESC)
+ return -EOPNOTSUPP;
+
+ if (mask & IB_DEVICE_MODIFY_NODE_DESC)
+ memcpy(dev->ibdev.node_desc, attr->node_desc,
+ IB_DEVICE_NODE_DESC_MAX);
+
+ return 0;
+}
+
+static int ionic_get_port_immutable(struct ib_device *ibdev, u32 port,
+ struct ib_port_immutable *attr)
+{
+ if (port != 1)
+ return -EINVAL;
+
+ attr->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
+
+ attr->pkey_tbl_len = IONIC_PKEY_TBL_LEN;
+ attr->gid_tbl_len = IONIC_GID_TBL_LEN;
+ attr->max_mad_size = IB_MGMT_MAD_SIZE;
+
+ return 0;
+}
+
+static void ionic_get_dev_fw_str(struct ib_device *ibdev, char *str)
+{
+ struct ionic_ibdev *dev = to_ionic_ibdev(ibdev);
+
+ strscpy(str, dev->info->fw_version, IB_FW_VERSION_NAME_MAX);
+}
+
+static const struct cpumask *ionic_get_vector_affinity(struct ib_device *ibdev,
+ int comp_vector)
+{
+ struct ionic_ibdev *dev = to_ionic_ibdev(ibdev);
+
+ if (comp_vector < 0 || comp_vector >= dev->eq_count)
+ return NULL;
+
+ return irq_get_affinity_mask(dev->eq_vec[comp_vector]->irq);
+}
+
+static ssize_t hw_rev_show(struct device *device, struct device_attribute *attr,
+ char *buf)
+{
+ struct ionic_ibdev *dev =
+ rdma_device_to_drv_device(device, struct ionic_ibdev, ibdev);
+
+ return sysfs_emit(buf, "0x%x\n", dev->info->asic_rev);
+}
+static DEVICE_ATTR_RO(hw_rev);
+
+static ssize_t hca_type_show(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct ionic_ibdev *dev =
+ rdma_device_to_drv_device(device, struct ionic_ibdev, ibdev);
+
+ return sysfs_emit(buf, "%s\n", dev->ibdev.node_desc);
+}
+static DEVICE_ATTR_RO(hca_type);
+
+static struct attribute *ionic_rdma_attributes[] = {
+ &dev_attr_hw_rev.attr,
+ &dev_attr_hca_type.attr,
+ NULL
+};
+
+static const struct attribute_group ionic_rdma_attr_group = {
+ .attrs = ionic_rdma_attributes,
+};
+
+static void ionic_disassociate_ucontext(struct ib_ucontext *ibcontext)
+{
+ /*
+ * Dummy define disassociate_ucontext so that it does not
+ * wait for user context before cleaning up hw resources.
+ */
+}
+
+static const struct ib_device_ops ionic_dev_ops = {
+ .owner = THIS_MODULE,
+ .driver_id = RDMA_DRIVER_IONIC,
+ .uverbs_abi_ver = IONIC_ABI_VERSION,
+ .query_device = ionic_query_device,
+ .query_port = ionic_query_port,
+ .get_link_layer = ionic_get_link_layer,
+ .get_netdev = ionic_get_netdev,
+ .query_pkey = ionic_query_pkey,
+ .modify_device = ionic_modify_device,
+
+ .get_port_immutable = ionic_get_port_immutable,
+ .get_dev_fw_str = ionic_get_dev_fw_str,
+ .get_vector_affinity = ionic_get_vector_affinity,
+ .device_group = &ionic_rdma_attr_group,
+ .disassociate_ucontext = ionic_disassociate_ucontext,
+};
+
static void ionic_destroy_ibdev(struct ionic_ibdev *dev)
{
ionic_kill_rdma_admin(dev, false);
@@ -84,6 +312,7 @@ static struct ionic_ibdev *ionic_create_ibdev(void *handle,
dev->handle = handle;
dev->lif_index = lif_index;
dev->ident = ident;
+ dev->info = ionic_api_get_devinfo(handle);
ionic_api_kernel_dbpage(handle, &dev->intr_ctrl, &dev->dbid,
&dev->dbpage);

@@ -203,6 +432,13 @@ static struct ionic_ibdev *ionic_create_ibdev(void *handle,

addrconf_ifid_eui48((u8 *)&ibdev->node_guid, ndev);

+ ibdev->uverbs_cmd_mask =
+ BIT_ULL(IB_USER_VERBS_CMD_GET_CONTEXT) |
+ BIT_ULL(IB_USER_VERBS_CMD_QUERY_DEVICE) |
+ BIT_ULL(IB_USER_VERBS_CMD_QUERY_PORT) |
+ 0;
+
+ ib_set_device_ops(&dev->ibdev, &ionic_dev_ops);
ionic_datapath_setops(dev);
ionic_controlpath_setops(dev);
rc = ib_register_device(ibdev, "ionic_%d", ibdev->dev.parent);
diff --git a/drivers/infiniband/hw/ionic/ionic_ibdev.h b/drivers/infiniband/hw/ionic/ionic_ibdev.h
index bb2cb1bc41ba..00ad562b4713 100644
--- a/drivers/infiniband/hw/ionic/ionic_ibdev.h
+++ b/drivers/infiniband/hw/ionic/ionic_ibdev.h
@@ -31,6 +31,11 @@
#define IONIC_EQ_ISR_BUDGET 10
#define IONIC_EQ_WORK_BUDGET 1000
#define IONIC_PAGE_SIZE_SUPPORTED 0x40201000 /* 4kb, 2Mb, 1Gb */
+#define IONIC_MAX_RD_ATOM 16
+#define IONIC_PKEY_TBL_LEN 1
+#define IONIC_GID_TBL_LEN 256
+#define IONIC_MAX_PD 1024
+
#define IONIC_SPEC_HIGH 8
#define IONIC_MAX_PD 1024
#define IONIC_SQCMB_ORDER 5
--
2.34.1