Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 697 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/hfi1/sysfs.c b/drivers/infiniband/hw/hfi1/sysfs.c
new file mode 100644
index 000000000..3b3407dc7
--- /dev/null
+++ b/drivers/infiniband/hw/hfi1/sysfs.c
@@ -0,0 +1,697 @@
+// SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause
+/*
+ * Copyright(c) 2015-2017 Intel Corporation.
+ */
+
+#include <linux/ctype.h>
+#include <rdma/ib_sysfs.h>
+
+#include "hfi.h"
+#include "mad.h"
+#include "trace.h"
+
+static struct hfi1_pportdata *hfi1_get_pportdata_kobj(struct kobject *kobj)
+{
+	u32 port_num;
+	struct ib_device *ibdev = ib_port_sysfs_get_ibdev_kobj(kobj, &port_num);
+	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+
+	return &dd->pport[port_num - 1];
+}
+
+/*
+ * Start of per-port congestion control structures and support code
+ */
+
+/*
+ * Congestion control table size followed by table entries
+ */
+static ssize_t cc_table_bin_read(struct file *filp, struct kobject *kobj,
+				 struct bin_attribute *bin_attr, char *buf,
+				 loff_t pos, size_t count)
+{
+	int ret;
+	struct hfi1_pportdata *ppd = hfi1_get_pportdata_kobj(kobj);
+	struct cc_state *cc_state;
+
+	ret = ppd->total_cct_entry * sizeof(struct ib_cc_table_entry_shadow)
+		 + sizeof(__be16);
+
+	if (pos > ret)
+		return -EINVAL;
+
+	if (count > ret - pos)
+		count = ret - pos;
+
+	if (!count)
+		return count;
+
+	rcu_read_lock();
+	cc_state = get_cc_state(ppd);
+	if (!cc_state) {
+		rcu_read_unlock();
+		return -EINVAL;
+	}
+	memcpy(buf, (void *)&cc_state->cct + pos, count);
+	rcu_read_unlock();
+
+	return count;
+}
+static BIN_ATTR_RO(cc_table_bin, PAGE_SIZE);
+
+/*
+ * Congestion settings: port control, control map and an array of 16
+ * entries for the congestion entries - increase, timer, event log
+ * trigger threshold and the minimum injection rate delay.
+ */
+static ssize_t cc_setting_bin_read(struct file *filp, struct kobject *kobj,
+				   struct bin_attribute *bin_attr,
+				   char *buf, loff_t pos, size_t count)
+{
+	struct hfi1_pportdata *ppd = hfi1_get_pportdata_kobj(kobj);
+	int ret;
+	struct cc_state *cc_state;
+
+	ret = sizeof(struct opa_congestion_setting_attr_shadow);
+
+	if (pos > ret)
+		return -EINVAL;
+	if (count > ret - pos)
+		count = ret - pos;
+
+	if (!count)
+		return count;
+
+	rcu_read_lock();
+	cc_state = get_cc_state(ppd);
+	if (!cc_state) {
+		rcu_read_unlock();
+		return -EINVAL;
+	}
+	memcpy(buf, (void *)&cc_state->cong_setting + pos, count);
+	rcu_read_unlock();
+
+	return count;
+}
+static BIN_ATTR_RO(cc_setting_bin, PAGE_SIZE);
+
+static struct bin_attribute *port_cc_bin_attributes[] = {
+	&bin_attr_cc_setting_bin,
+	&bin_attr_cc_table_bin,
+	NULL
+};
+
+static ssize_t cc_prescan_show(struct ib_device *ibdev, u32 port_num,
+			       struct ib_port_attribute *attr, char *buf)
+{
+	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+	struct hfi1_pportdata *ppd = &dd->pport[port_num - 1];
+
+	return sysfs_emit(buf, "%s\n", ppd->cc_prescan ? "on" : "off");
+}
+
+static ssize_t cc_prescan_store(struct ib_device *ibdev, u32 port_num,
+				struct ib_port_attribute *attr, const char *buf,
+				size_t count)
+{
+	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+	struct hfi1_pportdata *ppd = &dd->pport[port_num - 1];
+
+	if (!memcmp(buf, "on", 2))
+		ppd->cc_prescan = true;
+	else if (!memcmp(buf, "off", 3))
+		ppd->cc_prescan = false;
+
+	return count;
+}
+static IB_PORT_ATTR_ADMIN_RW(cc_prescan);
+
+static struct attribute *port_cc_attributes[] = {
+	&ib_port_attr_cc_prescan.attr,
+	NULL
+};
+
+static const struct attribute_group port_cc_group = {
+	.name = "CCMgtA",
+	.attrs = port_cc_attributes,
+	.bin_attrs = port_cc_bin_attributes,
+};
+
+/* Start sc2vl */
+struct hfi1_sc2vl_attr {
+	struct ib_port_attribute attr;
+	int sc;
+};
+
+static ssize_t sc2vl_attr_show(struct ib_device *ibdev, u32 port_num,
+			       struct ib_port_attribute *attr, char *buf)
+{
+	struct hfi1_sc2vl_attr *sattr =
+		container_of(attr, struct hfi1_sc2vl_attr, attr);
+	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+
+	return sysfs_emit(buf, "%u\n", *((u8 *)dd->sc2vl + sattr->sc));
+}
+
+#define HFI1_SC2VL_ATTR(N)                                                     \
+	static struct hfi1_sc2vl_attr hfi1_sc2vl_attr_##N = {                  \
+		.attr = __ATTR(N, 0444, sc2vl_attr_show, NULL),                \
+		.sc = N,                                                       \
+	}
+
+HFI1_SC2VL_ATTR(0);
+HFI1_SC2VL_ATTR(1);
+HFI1_SC2VL_ATTR(2);
+HFI1_SC2VL_ATTR(3);
+HFI1_SC2VL_ATTR(4);
+HFI1_SC2VL_ATTR(5);
+HFI1_SC2VL_ATTR(6);
+HFI1_SC2VL_ATTR(7);
+HFI1_SC2VL_ATTR(8);
+HFI1_SC2VL_ATTR(9);
+HFI1_SC2VL_ATTR(10);
+HFI1_SC2VL_ATTR(11);
+HFI1_SC2VL_ATTR(12);
+HFI1_SC2VL_ATTR(13);
+HFI1_SC2VL_ATTR(14);
+HFI1_SC2VL_ATTR(15);
+HFI1_SC2VL_ATTR(16);
+HFI1_SC2VL_ATTR(17);
+HFI1_SC2VL_ATTR(18);
+HFI1_SC2VL_ATTR(19);
+HFI1_SC2VL_ATTR(20);
+HFI1_SC2VL_ATTR(21);
+HFI1_SC2VL_ATTR(22);
+HFI1_SC2VL_ATTR(23);
+HFI1_SC2VL_ATTR(24);
+HFI1_SC2VL_ATTR(25);
+HFI1_SC2VL_ATTR(26);
+HFI1_SC2VL_ATTR(27);
+HFI1_SC2VL_ATTR(28);
+HFI1_SC2VL_ATTR(29);
+HFI1_SC2VL_ATTR(30);
+HFI1_SC2VL_ATTR(31);
+
+static struct attribute *port_sc2vl_attributes[] = {
+	&hfi1_sc2vl_attr_0.attr.attr,
+	&hfi1_sc2vl_attr_1.attr.attr,
+	&hfi1_sc2vl_attr_2.attr.attr,
+	&hfi1_sc2vl_attr_3.attr.attr,
+	&hfi1_sc2vl_attr_4.attr.attr,
+	&hfi1_sc2vl_attr_5.attr.attr,
+	&hfi1_sc2vl_attr_6.attr.attr,
+	&hfi1_sc2vl_attr_7.attr.attr,
+	&hfi1_sc2vl_attr_8.attr.attr,
+	&hfi1_sc2vl_attr_9.attr.attr,
+	&hfi1_sc2vl_attr_10.attr.attr,
+	&hfi1_sc2vl_attr_11.attr.attr,
+	&hfi1_sc2vl_attr_12.attr.attr,
+	&hfi1_sc2vl_attr_13.attr.attr,
+	&hfi1_sc2vl_attr_14.attr.attr,
+	&hfi1_sc2vl_attr_15.attr.attr,
+	&hfi1_sc2vl_attr_16.attr.attr,
+	&hfi1_sc2vl_attr_17.attr.attr,
+	&hfi1_sc2vl_attr_18.attr.attr,
+	&hfi1_sc2vl_attr_19.attr.attr,
+	&hfi1_sc2vl_attr_20.attr.attr,
+	&hfi1_sc2vl_attr_21.attr.attr,
+	&hfi1_sc2vl_attr_22.attr.attr,
+	&hfi1_sc2vl_attr_23.attr.attr,
+	&hfi1_sc2vl_attr_24.attr.attr,
+	&hfi1_sc2vl_attr_25.attr.attr,
+	&hfi1_sc2vl_attr_26.attr.attr,
+	&hfi1_sc2vl_attr_27.attr.attr,
+	&hfi1_sc2vl_attr_28.attr.attr,
+	&hfi1_sc2vl_attr_29.attr.attr,
+	&hfi1_sc2vl_attr_30.attr.attr,
+	&hfi1_sc2vl_attr_31.attr.attr,
+	NULL
+};
+
+static const struct attribute_group port_sc2vl_group = {
+	.name = "sc2vl",
+	.attrs = port_sc2vl_attributes,
+};
+/* End sc2vl */
+
+/* Start sl2sc */
+struct hfi1_sl2sc_attr {
+	struct ib_port_attribute attr;
+	int sl;
+};
+
+static ssize_t sl2sc_attr_show(struct ib_device *ibdev, u32 port_num,
+			       struct ib_port_attribute *attr, char *buf)
+{
+	struct hfi1_sl2sc_attr *sattr =
+		container_of(attr, struct hfi1_sl2sc_attr, attr);
+	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+	struct hfi1_ibport *ibp = &dd->pport[port_num - 1].ibport_data;
+
+	return sysfs_emit(buf, "%u\n", ibp->sl_to_sc[sattr->sl]);
+}
+
+#define HFI1_SL2SC_ATTR(N)                                                     \
+	static struct hfi1_sl2sc_attr hfi1_sl2sc_attr_##N = {                  \
+		.attr = __ATTR(N, 0444, sl2sc_attr_show, NULL), .sl = N        \
+	}
+
+HFI1_SL2SC_ATTR(0);
+HFI1_SL2SC_ATTR(1);
+HFI1_SL2SC_ATTR(2);
+HFI1_SL2SC_ATTR(3);
+HFI1_SL2SC_ATTR(4);
+HFI1_SL2SC_ATTR(5);
+HFI1_SL2SC_ATTR(6);
+HFI1_SL2SC_ATTR(7);
+HFI1_SL2SC_ATTR(8);
+HFI1_SL2SC_ATTR(9);
+HFI1_SL2SC_ATTR(10);
+HFI1_SL2SC_ATTR(11);
+HFI1_SL2SC_ATTR(12);
+HFI1_SL2SC_ATTR(13);
+HFI1_SL2SC_ATTR(14);
+HFI1_SL2SC_ATTR(15);
+HFI1_SL2SC_ATTR(16);
+HFI1_SL2SC_ATTR(17);
+HFI1_SL2SC_ATTR(18);
+HFI1_SL2SC_ATTR(19);
+HFI1_SL2SC_ATTR(20);
+HFI1_SL2SC_ATTR(21);
+HFI1_SL2SC_ATTR(22);
+HFI1_SL2SC_ATTR(23);
+HFI1_SL2SC_ATTR(24);
+HFI1_SL2SC_ATTR(25);
+HFI1_SL2SC_ATTR(26);
+HFI1_SL2SC_ATTR(27);
+HFI1_SL2SC_ATTR(28);
+HFI1_SL2SC_ATTR(29);
+HFI1_SL2SC_ATTR(30);
+HFI1_SL2SC_ATTR(31);
+
+static struct attribute *port_sl2sc_attributes[] = {
+	&hfi1_sl2sc_attr_0.attr.attr,
+	&hfi1_sl2sc_attr_1.attr.attr,
+	&hfi1_sl2sc_attr_2.attr.attr,
+	&hfi1_sl2sc_attr_3.attr.attr,
+	&hfi1_sl2sc_attr_4.attr.attr,
+	&hfi1_sl2sc_attr_5.attr.attr,
+	&hfi1_sl2sc_attr_6.attr.attr,
+	&hfi1_sl2sc_attr_7.attr.attr,
+	&hfi1_sl2sc_attr_8.attr.attr,
+	&hfi1_sl2sc_attr_9.attr.attr,
+	&hfi1_sl2sc_attr_10.attr.attr,
+	&hfi1_sl2sc_attr_11.attr.attr,
+	&hfi1_sl2sc_attr_12.attr.attr,
+	&hfi1_sl2sc_attr_13.attr.attr,
+	&hfi1_sl2sc_attr_14.attr.attr,
+	&hfi1_sl2sc_attr_15.attr.attr,
+	&hfi1_sl2sc_attr_16.attr.attr,
+	&hfi1_sl2sc_attr_17.attr.attr,
+	&hfi1_sl2sc_attr_18.attr.attr,
+	&hfi1_sl2sc_attr_19.attr.attr,
+	&hfi1_sl2sc_attr_20.attr.attr,
+	&hfi1_sl2sc_attr_21.attr.attr,
+	&hfi1_sl2sc_attr_22.attr.attr,
+	&hfi1_sl2sc_attr_23.attr.attr,
+	&hfi1_sl2sc_attr_24.attr.attr,
+	&hfi1_sl2sc_attr_25.attr.attr,
+	&hfi1_sl2sc_attr_26.attr.attr,
+	&hfi1_sl2sc_attr_27.attr.attr,
+	&hfi1_sl2sc_attr_28.attr.attr,
+	&hfi1_sl2sc_attr_29.attr.attr,
+	&hfi1_sl2sc_attr_30.attr.attr,
+	&hfi1_sl2sc_attr_31.attr.attr,
+	NULL
+};
+
+static const struct attribute_group port_sl2sc_group = {
+	.name = "sl2sc",
+	.attrs = port_sl2sc_attributes,
+};
+
+/* End sl2sc */
+
+/* Start vl2mtu */
+
+struct hfi1_vl2mtu_attr {
+	struct ib_port_attribute attr;
+	int vl;
+};
+
+static ssize_t vl2mtu_attr_show(struct ib_device *ibdev, u32 port_num,
+				struct ib_port_attribute *attr, char *buf)
+{
+	struct hfi1_vl2mtu_attr *vlattr =
+		container_of(attr, struct hfi1_vl2mtu_attr, attr);
+	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+
+	return sysfs_emit(buf, "%u\n", dd->vld[vlattr->vl].mtu);
+}
+
+#define HFI1_VL2MTU_ATTR(N)                                                    \
+	static struct hfi1_vl2mtu_attr hfi1_vl2mtu_attr_##N = {                \
+		.attr = __ATTR(N, 0444, vl2mtu_attr_show, NULL),               \
+		.vl = N,                                                       \
+	}
+
+HFI1_VL2MTU_ATTR(0);
+HFI1_VL2MTU_ATTR(1);
+HFI1_VL2MTU_ATTR(2);
+HFI1_VL2MTU_ATTR(3);
+HFI1_VL2MTU_ATTR(4);
+HFI1_VL2MTU_ATTR(5);
+HFI1_VL2MTU_ATTR(6);
+HFI1_VL2MTU_ATTR(7);
+HFI1_VL2MTU_ATTR(8);
+HFI1_VL2MTU_ATTR(9);
+HFI1_VL2MTU_ATTR(10);
+HFI1_VL2MTU_ATTR(11);
+HFI1_VL2MTU_ATTR(12);
+HFI1_VL2MTU_ATTR(13);
+HFI1_VL2MTU_ATTR(14);
+HFI1_VL2MTU_ATTR(15);
+
+static struct attribute *port_vl2mtu_attributes[] = {
+	&hfi1_vl2mtu_attr_0.attr.attr,
+	&hfi1_vl2mtu_attr_1.attr.attr,
+	&hfi1_vl2mtu_attr_2.attr.attr,
+	&hfi1_vl2mtu_attr_3.attr.attr,
+	&hfi1_vl2mtu_attr_4.attr.attr,
+	&hfi1_vl2mtu_attr_5.attr.attr,
+	&hfi1_vl2mtu_attr_6.attr.attr,
+	&hfi1_vl2mtu_attr_7.attr.attr,
+	&hfi1_vl2mtu_attr_8.attr.attr,
+	&hfi1_vl2mtu_attr_9.attr.attr,
+	&hfi1_vl2mtu_attr_10.attr.attr,
+	&hfi1_vl2mtu_attr_11.attr.attr,
+	&hfi1_vl2mtu_attr_12.attr.attr,
+	&hfi1_vl2mtu_attr_13.attr.attr,
+	&hfi1_vl2mtu_attr_14.attr.attr,
+	&hfi1_vl2mtu_attr_15.attr.attr,
+	NULL
+};
+
+static const struct attribute_group port_vl2mtu_group = {
+	.name = "vl2mtu",
+	.attrs = port_vl2mtu_attributes,
+};
+
+/* end of per-port file structures and support code */
+
+/*
+ * Start of per-unit (or driver, in some cases, but replicated
+ * per unit) functions (these get a device *)
+ */
+static ssize_t hw_rev_show(struct device *device, struct device_attribute *attr,
+			   char *buf)
+{
+	struct hfi1_ibdev *dev =
+		rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
+
+	return sysfs_emit(buf, "%x\n", dd_from_dev(dev)->minrev);
+}
+static DEVICE_ATTR_RO(hw_rev);
+
+static ssize_t board_id_show(struct device *device,
+			     struct device_attribute *attr, char *buf)
+{
+	struct hfi1_ibdev *dev =
+		rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
+	struct hfi1_devdata *dd = dd_from_dev(dev);
+
+	if (!dd->boardname)
+		return -EINVAL;
+
+	return sysfs_emit(buf, "%s\n", dd->boardname);
+}
+static DEVICE_ATTR_RO(board_id);
+
+static ssize_t boardversion_show(struct device *device,
+				 struct device_attribute *attr, char *buf)
+{
+	struct hfi1_ibdev *dev =
+		rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
+	struct hfi1_devdata *dd = dd_from_dev(dev);
+
+	/* The string printed here is already newline-terminated. */
+	return sysfs_emit(buf, "%s", dd->boardversion);
+}
+static DEVICE_ATTR_RO(boardversion);
+
+static ssize_t nctxts_show(struct device *device,
+			   struct device_attribute *attr, char *buf)
+{
+	struct hfi1_ibdev *dev =
+		rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
+	struct hfi1_devdata *dd = dd_from_dev(dev);
+
+	/*
+	 * Return the smaller of send and receive contexts.
+	 * Normally, user level applications would require both a send
+	 * and a receive context, so returning the smaller of the two counts
+	 * give a more accurate picture of total contexts available.
+	 */
+	return sysfs_emit(buf, "%u\n",
+			  min(dd->num_user_contexts,
+			      (u32)dd->sc_sizes[SC_USER].count));
+}
+static DEVICE_ATTR_RO(nctxts);
+
+static ssize_t nfreectxts_show(struct device *device,
+			       struct device_attribute *attr, char *buf)
+{
+	struct hfi1_ibdev *dev =
+		rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
+	struct hfi1_devdata *dd = dd_from_dev(dev);
+
+	/* Return the number of free user ports (contexts) available. */
+	return sysfs_emit(buf, "%u\n", dd->freectxts);
+}
+static DEVICE_ATTR_RO(nfreectxts);
+
+static ssize_t serial_show(struct device *device,
+			   struct device_attribute *attr, char *buf)
+{
+	struct hfi1_ibdev *dev =
+		rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
+	struct hfi1_devdata *dd = dd_from_dev(dev);
+
+	/* dd->serial is already newline terminated in chip.c */
+	return sysfs_emit(buf, "%s", dd->serial);
+}
+static DEVICE_ATTR_RO(serial);
+
+static ssize_t chip_reset_store(struct device *device,
+				struct device_attribute *attr, const char *buf,
+				size_t count)
+{
+	struct hfi1_ibdev *dev =
+		rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
+	struct hfi1_devdata *dd = dd_from_dev(dev);
+	int ret;
+
+	if (count < 5 || memcmp(buf, "reset", 5) || !dd->diag_client) {
+		ret = -EINVAL;
+		goto bail;
+	}
+
+	ret = hfi1_reset_device(dd->unit);
+bail:
+	return ret < 0 ? ret : count;
+}
+static DEVICE_ATTR_WO(chip_reset);
+
+/*
+ * Convert the reported temperature from an integer (reported in
+ * units of 0.25C) to a floating point number.
+ */
+#define temp_d(t) ((t) >> 2)
+#define temp_f(t) (((t)&0x3) * 25u)
+
+/*
+ * Dump tempsense values, in decimal, to ease shell-scripts.
+ */
+static ssize_t tempsense_show(struct device *device,
+			      struct device_attribute *attr, char *buf)
+{
+	struct hfi1_ibdev *dev =
+		rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
+	struct hfi1_devdata *dd = dd_from_dev(dev);
+	struct hfi1_temp temp;
+	int ret;
+
+	ret = hfi1_tempsense_rd(dd, &temp);
+	if (ret)
+		return ret;
+
+	return sysfs_emit(buf, "%u.%02u %u.%02u %u.%02u %u.%02u %u %u %u\n",
+			  temp_d(temp.curr), temp_f(temp.curr),
+			  temp_d(temp.lo_lim), temp_f(temp.lo_lim),
+			  temp_d(temp.hi_lim), temp_f(temp.hi_lim),
+			  temp_d(temp.crit_lim), temp_f(temp.crit_lim),
+			  temp.triggers & 0x1,
+			  temp.triggers & 0x2,
+			  temp.triggers & 0x4);
+}
+static DEVICE_ATTR_RO(tempsense);
+
+/*
+ * end of per-unit (or driver, in some cases, but replicated
+ * per unit) functions
+ */
+
+/* start of per-unit file structures and support code */
+static struct attribute *hfi1_attributes[] = {
+	&dev_attr_hw_rev.attr,
+	&dev_attr_board_id.attr,
+	&dev_attr_nctxts.attr,
+	&dev_attr_nfreectxts.attr,
+	&dev_attr_serial.attr,
+	&dev_attr_boardversion.attr,
+	&dev_attr_tempsense.attr,
+	&dev_attr_chip_reset.attr,
+	NULL,
+};
+
+const struct attribute_group ib_hfi1_attr_group = {
+	.attrs = hfi1_attributes,
+};
+
+const struct attribute_group *hfi1_attr_port_groups[] = {
+	&port_cc_group,
+	&port_sc2vl_group,
+	&port_sl2sc_group,
+	&port_vl2mtu_group,
+	NULL,
+};
+
+struct sde_attribute {
+	struct attribute attr;
+	ssize_t (*show)(struct sdma_engine *sde, char *buf);
+	ssize_t (*store)(struct sdma_engine *sde, const char *buf, size_t cnt);
+};
+
+static ssize_t sde_show(struct kobject *kobj, struct attribute *attr, char *buf)
+{
+	struct sde_attribute *sde_attr =
+		container_of(attr, struct sde_attribute, attr);
+	struct sdma_engine *sde =
+		container_of(kobj, struct sdma_engine, kobj);
+
+	if (!sde_attr->show)
+		return -EINVAL;
+
+	return sde_attr->show(sde, buf);
+}
+
+static ssize_t sde_store(struct kobject *kobj, struct attribute *attr,
+			 const char *buf, size_t count)
+{
+	struct sde_attribute *sde_attr =
+		container_of(attr, struct sde_attribute, attr);
+	struct sdma_engine *sde =
+		container_of(kobj, struct sdma_engine, kobj);
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if (!sde_attr->store)
+		return -EINVAL;
+
+	return sde_attr->store(sde, buf, count);
+}
+
+static const struct sysfs_ops sde_sysfs_ops = {
+	.show = sde_show,
+	.store = sde_store,
+};
+
+static struct kobj_type sde_ktype = {
+	.sysfs_ops = &sde_sysfs_ops,
+};
+
+#define SDE_ATTR(_name, _mode, _show, _store) \
+	struct sde_attribute sde_attr_##_name = \
+		__ATTR(_name, _mode, _show, _store)
+
+static ssize_t sde_show_cpu_to_sde_map(struct sdma_engine *sde, char *buf)
+{
+	return sdma_get_cpu_to_sde_map(sde, buf);
+}
+
+static ssize_t sde_store_cpu_to_sde_map(struct sdma_engine *sde,
+					const char *buf, size_t count)
+{
+	return sdma_set_cpu_to_sde_map(sde, buf, count);
+}
+
+static ssize_t sde_show_vl(struct sdma_engine *sde, char *buf)
+{
+	int vl;
+
+	vl = sdma_engine_get_vl(sde);
+	if (vl < 0)
+		return vl;
+
+	return sysfs_emit(buf, "%d\n", vl);
+}
+
+static SDE_ATTR(cpu_list, S_IWUSR | S_IRUGO,
+		sde_show_cpu_to_sde_map,
+		sde_store_cpu_to_sde_map);
+static SDE_ATTR(vl, S_IRUGO, sde_show_vl, NULL);
+
+static struct sde_attribute *sde_attribs[] = {
+	&sde_attr_cpu_list,
+	&sde_attr_vl
+};
+
+/*
+ * Register and create our files in /sys/class/infiniband.
+ */
+int hfi1_verbs_register_sysfs(struct hfi1_devdata *dd)
+{
+	struct ib_device *dev = &dd->verbs_dev.rdi.ibdev;
+	struct device *class_dev = &dev->dev;
+	int i, j, ret;
+
+	for (i = 0; i < dd->num_sdma; i++) {
+		ret = kobject_init_and_add(&dd->per_sdma[i].kobj,
+					   &sde_ktype, &class_dev->kobj,
+					   "sdma%d", i);
+		if (ret)
+			goto bail;
+
+		for (j = 0; j < ARRAY_SIZE(sde_attribs); j++) {
+			ret = sysfs_create_file(&dd->per_sdma[i].kobj,
+						&sde_attribs[j]->attr);
+			if (ret)
+				goto bail;
+		}
+	}
+
+	return 0;
+bail:
+	/*
+	 * The function kobject_put() will call kobject_del() if the kobject
+	 * has been added successfully. The sysfs files created under the
+	 * kobject directory will also be removed during the process.
+	 */
+	for (; i >= 0; i--)
+		kobject_put(&dd->per_sdma[i].kobj);
+
+	return ret;
+}
+
+/*
+ * Unregister and remove our files in /sys/class/infiniband.
+ */
+void hfi1_verbs_unregister_sysfs(struct hfi1_devdata *dd)
+{
+	int i;
+
+	/* Unwind operations in hfi1_verbs_register_sysfs() */
+	for (i = 0; i < dd->num_sdma; i++)
+		kobject_put(&dd->per_sdma[i].kobj);
+}