1 files changed, 295 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/usnic/usnic_ib_sysfs.c b/drivers/infiniband/hw/usnic/usnic_ib_sysfs.c
new file mode 100644
index 0000000000..fdb63a8fb9
--- /dev/null
+++ b/drivers/infiniband/hw/usnic/usnic_ib_sysfs.c
@@ -0,0 +1,295 @@
+/*
+ * Copyright (c) 2013, Cisco Systems, 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
+ * 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/init.h>
+#include <linux/errno.h>
+
+#include <rdma/ib_user_verbs.h>
+#include <rdma/ib_addr.h>
+
+#include "usnic_common_util.h"
+#include "usnic_ib.h"
+#include "usnic_ib_qp_grp.h"
+#include "usnic_vnic.h"
+#include "usnic_ib_verbs.h"
+#include "usnic_ib_sysfs.h"
+#include "usnic_log.h"
+
+static ssize_t board_id_show(struct device *device,
+			     struct device_attribute *attr, char *buf)
+{
+	struct usnic_ib_dev *us_ibdev =
+		rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
+	unsigned short subsystem_device_id;
+
+	mutex_lock(&us_ibdev->usdev_lock);
+	subsystem_device_id = us_ibdev->pdev->subsystem_device;
+	mutex_unlock(&us_ibdev->usdev_lock);
+
+	return sysfs_emit(buf, "%u\n", subsystem_device_id);
+}
+static DEVICE_ATTR_RO(board_id);
+
+/*
+ * Report the configuration for this PF
+ */
+static ssize_t
+config_show(struct device *device, struct device_attribute *attr, char *buf)
+{
+	struct usnic_ib_dev *us_ibdev =
+		rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
+	enum usnic_vnic_res_type res_type;
+	int len;
+
+	mutex_lock(&us_ibdev->usdev_lock);
+	if (kref_read(&us_ibdev->vf_cnt) > 0) {
+		char *busname;
+		char *sep = "";
+		/*
+		 * bus name seems to come with annoying prefix.
+		 * Remove it if it is predictable
+		 */
+		busname = us_ibdev->pdev->bus->name;
+		if (strncmp(busname, "PCI Bus ", 8) == 0)
+			busname += 8;
+
+		len = sysfs_emit(buf, "%s: %s:%d.%d, %s, %pM, %u VFs\n",
+				 dev_name(&us_ibdev->ib_dev.dev),
+				 busname,
+				 PCI_SLOT(us_ibdev->pdev->devfn),
+				 PCI_FUNC(us_ibdev->pdev->devfn),
+				 netdev_name(us_ibdev->netdev),
+				 us_ibdev->ufdev->mac,
+				 kref_read(&us_ibdev->vf_cnt));
+
+		len += sysfs_emit_at(buf, len, " Per VF:");
+		for (res_type = USNIC_VNIC_RES_TYPE_EOL;
+		     res_type < USNIC_VNIC_RES_TYPE_MAX; res_type++) {
+			if (us_ibdev->vf_res_cnt[res_type] == 0)
+				continue;
+			len += sysfs_emit_at(buf, len, "%s %d %s",
+					     sep,
+					     us_ibdev->vf_res_cnt[res_type],
+					     usnic_vnic_res_type_to_str(res_type));
+			sep = ",";
+		}
+		len += sysfs_emit_at(buf, len, "\n");
+	} else {
+		len = sysfs_emit(buf, "%s: no VFs\n",
+				 dev_name(&us_ibdev->ib_dev.dev));
+	}
+
+	mutex_unlock(&us_ibdev->usdev_lock);
+
+	return len;
+}
+static DEVICE_ATTR_RO(config);
+
+static ssize_t
+iface_show(struct device *device, struct device_attribute *attr, char *buf)
+{
+	struct usnic_ib_dev *us_ibdev =
+		rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
+
+	return sysfs_emit(buf, "%s\n", netdev_name(us_ibdev->netdev));
+}
+static DEVICE_ATTR_RO(iface);
+
+static ssize_t
+max_vf_show(struct device *device, struct device_attribute *attr, char *buf)
+{
+	struct usnic_ib_dev *us_ibdev =
+		rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
+
+	return sysfs_emit(buf, "%u\n", kref_read(&us_ibdev->vf_cnt));
+}
+static DEVICE_ATTR_RO(max_vf);
+
+static ssize_t
+qp_per_vf_show(struct device *device, struct device_attribute *attr, char *buf)
+{
+	struct usnic_ib_dev *us_ibdev =
+		rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
+	int qp_per_vf;
+
+	qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ],
+			us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]);
+
+	return sysfs_emit(buf, "%d\n", qp_per_vf);
+}
+static DEVICE_ATTR_RO(qp_per_vf);
+
+static ssize_t
+cq_per_vf_show(struct device *device, struct device_attribute *attr, char *buf)
+{
+	struct usnic_ib_dev *us_ibdev =
+		rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
+
+	return sysfs_emit(buf, "%d\n",
+			  us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ]);
+}
+static DEVICE_ATTR_RO(cq_per_vf);
+
+static struct attribute *usnic_class_attributes[] = {
+	&dev_attr_board_id.attr,
+	&dev_attr_config.attr,
+	&dev_attr_iface.attr,
+	&dev_attr_max_vf.attr,
+	&dev_attr_qp_per_vf.attr,
+	&dev_attr_cq_per_vf.attr,
+	NULL
+};
+
+const struct attribute_group usnic_attr_group = {
+	.attrs = usnic_class_attributes,
+};
+
+struct qpn_attribute {
+	struct attribute attr;
+	ssize_t (*show)(struct usnic_ib_qp_grp *, char *buf);
+};
+
+/*
+ * Definitions for supporting QPN entries in sysfs
+ */
+static ssize_t
+usnic_ib_qpn_attr_show(struct kobject *kobj, struct attribute *attr, char *buf)
+{
+	struct usnic_ib_qp_grp *qp_grp;
+	struct qpn_attribute *qpn_attr;
+
+	qp_grp = container_of(kobj, struct usnic_ib_qp_grp, kobj);
+	qpn_attr = container_of(attr, struct qpn_attribute, attr);
+
+	return qpn_attr->show(qp_grp, buf);
+}
+
+static const struct sysfs_ops usnic_ib_qpn_sysfs_ops = {
+	.show = usnic_ib_qpn_attr_show
+};
+
+#define QPN_ATTR_RO(NAME) \
+struct qpn_attribute qpn_attr_##NAME = __ATTR_RO(NAME)
+
+static ssize_t context_show(struct usnic_ib_qp_grp *qp_grp, char *buf)
+{
+	return sysfs_emit(buf, "0x%p\n", qp_grp->ctx);
+}
+
+static ssize_t summary_show(struct usnic_ib_qp_grp *qp_grp, char *buf)
+{
+	int i, j;
+	struct usnic_vnic_res_chunk *res_chunk;
+	struct usnic_vnic_res *vnic_res;
+	int len;
+
+	len = sysfs_emit(buf, "QPN: %d State: (%s) PID: %u VF Idx: %hu",
+			 qp_grp->ibqp.qp_num,
+			 usnic_ib_qp_grp_state_to_string(qp_grp->state),
+			 qp_grp->owner_pid,
+			 usnic_vnic_get_index(qp_grp->vf->vnic));
+
+	for (i = 0; qp_grp->res_chunk_list[i]; i++) {
+		res_chunk = qp_grp->res_chunk_list[i];
+		for (j = 0; j < res_chunk->cnt; j++) {
+			vnic_res = res_chunk->res[j];
+			len += sysfs_emit_at(buf, len, " %s[%d]",
+				usnic_vnic_res_type_to_str(vnic_res->type),
+				vnic_res->vnic_idx);
+		}
+	}
+
+	len += sysfs_emit_at(buf, len, "\n");
+
+	return len;
+}
+
+static QPN_ATTR_RO(context);
+static QPN_ATTR_RO(summary);
+
+static struct attribute *usnic_ib_qpn_default_attrs[] = {
+	&qpn_attr_context.attr,
+	&qpn_attr_summary.attr,
+	NULL
+};
+ATTRIBUTE_GROUPS(usnic_ib_qpn_default);
+
+static struct kobj_type usnic_ib_qpn_type = {
+	.sysfs_ops = &usnic_ib_qpn_sysfs_ops,
+	.default_groups = usnic_ib_qpn_default_groups,
+};
+
+int usnic_ib_sysfs_register_usdev(struct usnic_ib_dev *us_ibdev)
+{
+	/* create kernel object for looking at individual QPs */
+	kobject_get(&us_ibdev->ib_dev.dev.kobj);
+	us_ibdev->qpn_kobj = kobject_create_and_add("qpn",
+			&us_ibdev->ib_dev.dev.kobj);
+	if (us_ibdev->qpn_kobj == NULL) {
+		kobject_put(&us_ibdev->ib_dev.dev.kobj);
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+void usnic_ib_sysfs_unregister_usdev(struct usnic_ib_dev *us_ibdev)
+{
+	kobject_put(us_ibdev->qpn_kobj);
+}
+
+void usnic_ib_sysfs_qpn_add(struct usnic_ib_qp_grp *qp_grp)
+{
+	struct usnic_ib_dev *us_ibdev;
+	int err;
+
+	us_ibdev = qp_grp->vf->pf;
+
+	err = kobject_init_and_add(&qp_grp->kobj, &usnic_ib_qpn_type,
+			kobject_get(us_ibdev->qpn_kobj),
+			"%d", qp_grp->grp_id);
+	if (err) {
+		kobject_put(us_ibdev->qpn_kobj);
+		return;
+	}
+}
+
+void usnic_ib_sysfs_qpn_remove(struct usnic_ib_qp_grp *qp_grp)
+{
+	struct usnic_ib_dev *us_ibdev;
+
+	us_ibdev = qp_grp->vf->pf;
+
+	kobject_put(&qp_grp->kobj);
+	kobject_put(us_ibdev->qpn_kobj);
+}