[PATCH 08/20] dlb2: add queue create and queue-depth-get ioctls

Gage Eads
2020-07-12T14:00:24Z

When a CPU enqueues a queue entry (QE) to DLB 2.0, the QE entry is sent to
a DLB 2.0 queue. These queues hold queue entries (QEs) that have not yet
been scheduled to a destination port. The queue's depth is the number of
QEs residing in a queue.

Each queue supports multiple priority levels, and while a directed queue
has a 1:1 mapping with a directed port, load-balanced queues can be
configured with a set of load-balanced ports that software desires the
queue's QEs to be scheduled to.

Signed-off-by: Gage Eads <gage.eads@intel.com>
Reviewed-by: Magnus Karlsson <magnus.karlsson@intel.com>
---
drivers/misc/dlb2/dlb2_ioctl.c | 82 +++++
drivers/misc/dlb2/dlb2_ioctl.h | 5 +
drivers/misc/dlb2/dlb2_main.c | 17 +
drivers/misc/dlb2/dlb2_main.h | 16 +
drivers/misc/dlb2/dlb2_pf_ops.c | 40 +++
drivers/misc/dlb2/dlb2_resource.c | 732 ++++++++++++++++++++++++++++++++++++++
drivers/misc/dlb2/dlb2_resource.h | 125 +++++++
include/uapi/linux/dlb2_user.h | 142 ++++++++
8 files changed, 1159 insertions(+)

diff --git a/drivers/misc/dlb2/dlb2_ioctl.c b/drivers/misc/dlb2/dlb2_ioctl.c
index b36e255e8d35..b1aa0c7bf011 100644
--- a/drivers/misc/dlb2/dlb2_ioctl.c
+++ b/drivers/misc/dlb2/dlb2_ioctl.c
@@ -44,6 +44,88 @@ static int dlb2_copy_resp_to_user(struct dlb2_dev *dev,
return 0;
}

+/*
+ * The DLB domain ioctl callback template minimizes replication of boilerplate
+ * code to copy arguments, acquire and release the resource lock, and execute
+ * the command. The arguments and response structure name should have the
+ * format dlb2_<lower_name>_args.
+ */
+#define DLB2_DOMAIN_IOCTL_CALLBACK_TEMPLATE(lower_name) \
+static int dlb2_domain_ioctl_##lower_name(struct dlb2_dev *dev, \
+ struct dlb2_domain *domain, \
+ unsigned long user_arg, \
+ u16 size) \
+{ \
+ struct dlb2_##lower_name##_args arg; \
+ struct dlb2_cmd_response response = {0}; \
+ int ret; \
+ \
+ dev_dbg(dev->dlb2_device, "Entering %s()\n", __func__); \
+ \
+ ret = dlb2_copy_from_user(dev, user_arg, size, &arg, sizeof(arg)); \
+ if (ret) \
+ return ret; \
+ \
+ /* Copy zeroes to verify the user-provided response pointer */ \
+ ret = dlb2_copy_resp_to_user(dev, arg.response, &response); \
+ if (ret) \
+ return ret; \
+ \
+ mutex_lock(&dev->resource_mutex); \
+ \
+ ret = dev->ops->lower_name(&dev->hw, \
+ domain->id, \
+ &arg, \
+ &response); \
+ \
+ mutex_unlock(&dev->resource_mutex); \
+ \
+ if (copy_to_user((void __user *)arg.response, \
+ &response, \
+ sizeof(response))) \
+ return -EFAULT; \
+ \
+ dev_dbg(dev->dlb2_device, "Exiting %s()\n", __func__); \
+ \
+ return ret; \
+}
+
+DLB2_DOMAIN_IOCTL_CALLBACK_TEMPLATE(create_ldb_queue)
+DLB2_DOMAIN_IOCTL_CALLBACK_TEMPLATE(create_dir_queue)
+DLB2_DOMAIN_IOCTL_CALLBACK_TEMPLATE(get_ldb_queue_depth)
+DLB2_DOMAIN_IOCTL_CALLBACK_TEMPLATE(get_dir_queue_depth)
+
+typedef int (*dlb2_domain_ioctl_callback_fn_t)(struct dlb2_dev *dev,
+ struct dlb2_domain *domain,
+ unsigned long arg,
+ u16 size);
+
+static dlb2_domain_ioctl_callback_fn_t
+dlb2_domain_ioctl_callback_fns[NUM_DLB2_DOMAIN_CMD] = {
+ dlb2_domain_ioctl_create_ldb_queue,
+ dlb2_domain_ioctl_create_dir_queue,
+ dlb2_domain_ioctl_get_ldb_queue_depth,
+ dlb2_domain_ioctl_get_dir_queue_depth,
+};
+
+int dlb2_domain_ioctl_dispatcher(struct dlb2_dev *dev,
+ struct dlb2_domain *domain,
+ unsigned int cmd,
+ unsigned long arg)
+{
+ int cmd_nr = _IOC_NR(cmd);
+ u16 sz = _IOC_SIZE(cmd);
+
+ if (cmd_nr >= NUM_DLB2_DOMAIN_CMD) {
+ dev_err(dev->dlb2_device,
+ "[%s()] Unexpected DLB DOMAIN command %d\n",
+ __func__, _IOC_NR(cmd));
+ return -1;
+ }
+
+ return dlb2_domain_ioctl_callback_fns[cmd_nr](dev, domain, arg, sz);
+}
+
/* [7:0]: device revision, [15:8]: device version */
#define DLB2_SET_DEVICE_VERSION(ver, rev) (((ver) << 8) | (rev))

diff --git a/drivers/misc/dlb2/dlb2_ioctl.h b/drivers/misc/dlb2/dlb2_ioctl.h
index 476548cdd33c..0e5fa0dd630a 100644
--- a/drivers/misc/dlb2/dlb2_ioctl.h
+++ b/drivers/misc/dlb2/dlb2_ioctl.h
@@ -11,4 +11,9 @@ int dlb2_ioctl_dispatcher(struct dlb2_dev *dev,
unsigned int cmd,
unsigned long arg);

+int dlb2_domain_ioctl_dispatcher(struct dlb2_dev *dev,
+ struct dlb2_domain *domain,
+ unsigned int cmd,
+ unsigned long arg);
+
#endif /* __DLB2_IOCTL_H */
diff --git a/drivers/misc/dlb2/dlb2_main.c b/drivers/misc/dlb2/dlb2_main.c
index 8ace8e1edbcb..a19bc542f637 100644
--- a/drivers/misc/dlb2/dlb2_main.c
+++ b/drivers/misc/dlb2/dlb2_main.c
@@ -180,9 +180,26 @@ static int dlb2_domain_close(struct inode *i, struct file *f)
return ret;
}

+static long
+dlb2_domain_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
+{
+ struct dlb2_domain *domain = f->private_data;
+ struct dlb2_dev *dev = domain->dlb2_dev;
+
+ if (_IOC_TYPE(cmd) != DLB2_IOC_MAGIC) {
+ dev_err(dev->dlb2_device,
+ "[%s()] Bad magic number!\n", __func__);
+ return -EINVAL;
+ }
+
+ return dlb2_domain_ioctl_dispatcher(dev, domain, cmd, arg);
+}
+
const struct file_operations dlb2_domain_fops = {
.owner = THIS_MODULE,
.release = dlb2_domain_close,
+ .unlocked_ioctl = dlb2_domain_ioctl,
+ .compat_ioctl = compat_ptr_ioctl,
};

/**********************************/
diff --git a/drivers/misc/dlb2/dlb2_main.h b/drivers/misc/dlb2/dlb2_main.h
index 76380f0ca51b..f89888fa781a 100644
--- a/drivers/misc/dlb2/dlb2_main.h
+++ b/drivers/misc/dlb2/dlb2_main.h
@@ -60,9 +60,25 @@ struct dlb2_device_ops {
int (*create_sched_domain)(struct dlb2_hw *hw,
struct dlb2_create_sched_domain_args *args,
struct dlb2_cmd_response *resp);
+ int (*create_ldb_queue)(struct dlb2_hw *hw,
+ u32 domain_id,
+ struct dlb2_create_ldb_queue_args *args,
+ struct dlb2_cmd_response *resp);
+ int (*create_dir_queue)(struct dlb2_hw *hw,
+ u32 domain_id,
+ struct dlb2_create_dir_queue_args *args,
+ struct dlb2_cmd_response *resp);
int (*get_num_resources)(struct dlb2_hw *hw,
struct dlb2_get_num_resources_args *args);
int (*reset_domain)(struct dlb2_hw *hw, u32 domain_id);
+ int (*get_ldb_queue_depth)(struct dlb2_hw *hw,
+ u32 domain_id,
+ struct dlb2_get_ldb_queue_depth_args *args,
+ struct dlb2_cmd_response *resp);
+ int (*get_dir_queue_depth)(struct dlb2_hw *hw,
+ u32 domain_id,
+ struct dlb2_get_dir_queue_depth_args *args,
+ struct dlb2_cmd_response *resp);
void (*init_hardware)(struct dlb2_dev *dev);
};

diff --git a/drivers/misc/dlb2/dlb2_pf_ops.c b/drivers/misc/dlb2/dlb2_pf_ops.c
index e4de46eccf87..ab36d253f396 100644
--- a/drivers/misc/dlb2/dlb2_pf_ops.c
+++ b/drivers/misc/dlb2/dlb2_pf_ops.c
@@ -235,6 +235,24 @@ dlb2_pf_create_sched_domain(struct dlb2_hw *hw,
}

static int
+dlb2_pf_create_ldb_queue(struct dlb2_hw *hw,
+ u32 id,
+ struct dlb2_create_ldb_queue_args *args,
+ struct dlb2_cmd_response *resp)
+{
+ return dlb2_hw_create_ldb_queue(hw, id, args, resp, false, 0);
+}
+
+static int
+dlb2_pf_create_dir_queue(struct dlb2_hw *hw,
+ u32 id,
+ struct dlb2_create_dir_queue_args *args,
+ struct dlb2_cmd_response *resp)
+{
+ return dlb2_hw_create_dir_queue(hw, id, args, resp, false, 0);
+}
+
+static int
dlb2_pf_get_num_resources(struct dlb2_hw *hw,
struct dlb2_get_num_resources_args *args)
{
@@ -247,6 +265,24 @@ dlb2_pf_reset_domain(struct dlb2_hw *hw, u32 id)
return dlb2_reset_domain(hw, id, false, 0);
}

+static int
+dlb2_pf_get_ldb_queue_depth(struct dlb2_hw *hw,
+ u32 id,
+ struct dlb2_get_ldb_queue_depth_args *args,
+ struct dlb2_cmd_response *resp)
+{
+ return dlb2_hw_get_ldb_queue_depth(hw, id, args, resp, false, 0);
+}
+
+static int
+dlb2_pf_get_dir_queue_depth(struct dlb2_hw *hw,
+ u32 id,
+ struct dlb2_get_dir_queue_depth_args *args,
+ struct dlb2_cmd_response *resp)
+{
+ return dlb2_hw_get_dir_queue_depth(hw, id, args, resp, false, 0);
+}
+
/********************************/
/****** DLB2 PF Device Ops ******/
/********************************/
@@ -265,7 +301,11 @@ struct dlb2_device_ops dlb2_pf_ops = {
.enable_pm = dlb2_pf_enable_pm,
.wait_for_device_ready = dlb2_pf_wait_for_device_ready,
.create_sched_domain = dlb2_pf_create_sched_domain,
+ .create_ldb_queue = dlb2_pf_create_ldb_queue,
+ .create_dir_queue = dlb2_pf_create_dir_queue,
.get_num_resources = dlb2_pf_get_num_resources,
.reset_domain = dlb2_pf_reset_domain,
+ .get_ldb_queue_depth = dlb2_pf_get_ldb_queue_depth,
+ .get_dir_queue_depth = dlb2_pf_get_dir_queue_depth,
.init_hardware = dlb2_pf_init_hardware,
};
diff --git a/drivers/misc/dlb2/dlb2_resource.c b/drivers/misc/dlb2/dlb2_resource.c
index d3773c0c5dd1..512b458b14e6 100644
--- a/drivers/misc/dlb2/dlb2_resource.c
+++ b/drivers/misc/dlb2/dlb2_resource.c
@@ -237,6 +237,24 @@ static struct dlb2_hw_domain *dlb2_get_domain_from_id(struct dlb2_hw *hw,
return NULL;
}

+static struct dlb2_dir_pq_pair *
+dlb2_get_domain_used_dir_pq(u32 id,
+ bool vdev_req,
+ struct dlb2_hw_domain *domain)
+{
+ struct dlb2_dir_pq_pair *port;
+
+ if (id >= DLB2_MAX_NUM_DIR_PORTS)
+ return NULL;
+
+ DLB2_DOM_LIST_FOR(domain->used_dir_pq_pairs, port)
+ if ((!vdev_req && port->id.phys_id == id) ||
+ (vdev_req && port->id.virt_id == id))
+ return port;
+
+ return NULL;
+}
+
static struct dlb2_ldb_queue *
dlb2_get_ldb_queue_from_id(struct dlb2_hw *hw,
u32 id,
@@ -268,6 +286,24 @@ dlb2_get_ldb_queue_from_id(struct dlb2_hw *hw,
return NULL;
}

+static struct dlb2_ldb_queue *
+dlb2_get_domain_ldb_queue(u32 id,
+ bool vdev_req,
+ struct dlb2_hw_domain *domain)
+{
+ struct dlb2_ldb_queue *queue;
+
+ if (id >= DLB2_MAX_NUM_LDB_QUEUES)
+ return NULL;
+
+ DLB2_DOM_LIST_FOR(domain->used_ldb_queues, queue)
+ if ((!vdev_req && queue->id.phys_id == id) ||
+ (vdev_req && queue->id.virt_id == id))
+ return queue;
+
+ return NULL;
+}
+
static int dlb2_attach_ldb_queues(struct dlb2_hw *hw,
struct dlb2_function_resources *rsrcs,
struct dlb2_hw_domain *domain,
@@ -707,6 +743,352 @@ dlb2_verify_create_sched_dom_args(struct dlb2_function_resources *rsrcs,
return 0;
}

+static int
+dlb2_verify_create_ldb_queue_args(struct dlb2_hw *hw,
+ u32 domain_id,
+ struct dlb2_create_ldb_queue_args *args,
+ struct dlb2_cmd_response *resp,
+ bool vdev_req,
+ unsigned int vdev_id)
+{
+ struct dlb2_hw_domain *domain;
+ int i;
+
+ domain = dlb2_get_domain_from_id(hw, domain_id, vdev_req, vdev_id);
+
+ if (!domain) {
+ resp->status = DLB2_ST_INVALID_DOMAIN_ID;
+ return -EINVAL;
+ }
+
+ if (!domain->configured) {
+ resp->status = DLB2_ST_DOMAIN_NOT_CONFIGURED;
+ return -EINVAL;
+ }
+
+ if (domain->started) {
+ resp->status = DLB2_ST_DOMAIN_STARTED;
+ return -EINVAL;
+ }
+
+ if (list_empty(&domain->avail_ldb_queues)) {
+ resp->status = DLB2_ST_LDB_QUEUES_UNAVAILABLE;
+ return -EINVAL;
+ }
+
+ if (args->num_sequence_numbers) {
+ for (i = 0; i < DLB2_MAX_NUM_SEQUENCE_NUMBER_GROUPS; i++) {
+ struct dlb2_sn_group *group = &hw->rsrcs.sn_groups[i];
+
+ if (group->sequence_numbers_per_queue ==
+ args->num_sequence_numbers &&
+ !dlb2_sn_group_full(group))
+ break;
+ }
+
+ if (i == DLB2_MAX_NUM_SEQUENCE_NUMBER_GROUPS) {
+ resp->status = DLB2_ST_SEQUENCE_NUMBERS_UNAVAILABLE;
+ return -EINVAL;
+ }
+ }
+
+ if (args->num_qid_inflights > 4096) {
+ resp->status = DLB2_ST_INVALID_QID_INFLIGHT_ALLOCATION;
+ return -EINVAL;
+ }
+
+ /* Inflights must be <= number of sequence numbers if ordered */
+ if (args->num_sequence_numbers != 0 &&
+ args->num_qid_inflights > args->num_sequence_numbers) {
+ resp->status = DLB2_ST_INVALID_QID_INFLIGHT_ALLOCATION;
+ return -EINVAL;
+ }
+
+ if (domain->num_avail_aqed_entries < args->num_atomic_inflights) {
+ resp->status = DLB2_ST_ATOMIC_INFLIGHTS_UNAVAILABLE;
+ return -EINVAL;
+ }
+
+ if (args->num_atomic_inflights &&
+ args->lock_id_comp_level != 0 &&
+ args->lock_id_comp_level != 64 &&
+ args->lock_id_comp_level != 128 &&
+ args->lock_id_comp_level != 256 &&
+ args->lock_id_comp_level != 512 &&
+ args->lock_id_comp_level != 1024 &&
+ args->lock_id_comp_level != 2048 &&
+ args->lock_id_comp_level != 4096 &&
+ args->lock_id_comp_level != 65536) {
+ resp->status = DLB2_ST_INVALID_LOCK_ID_COMP_LEVEL;
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int
+dlb2_verify_create_dir_queue_args(struct dlb2_hw *hw,
+ u32 domain_id,
+ struct dlb2_create_dir_queue_args *args,
+ struct dlb2_cmd_response *resp,
+ bool vdev_req,
+ unsigned int vdev_id)
+{
+ struct dlb2_hw_domain *domain;
+
+ domain = dlb2_get_domain_from_id(hw, domain_id, vdev_req, vdev_id);
+
+ if (!domain) {
+ resp->status = DLB2_ST_INVALID_DOMAIN_ID;
+ return -EINVAL;
+ }
+
+ if (!domain->configured) {
+ resp->status = DLB2_ST_DOMAIN_NOT_CONFIGURED;
+ return -EINVAL;
+ }
+
+ if (domain->started) {
+ resp->status = DLB2_ST_DOMAIN_STARTED;
+ return -EINVAL;
+ }
+
+ /*
+ * If the user claims the port is already configured, validate the port
+ * ID, its domain, and whether the port is configured.
+ */
+ if (args->port_id != -1) {
+ struct dlb2_dir_pq_pair *port;
+
+ port = dlb2_get_domain_used_dir_pq(args->port_id,
+ vdev_req,
+ domain);
+
+ if (!port || port->domain_id.phys_id != domain->id.phys_id ||
+ !port->port_configured) {
+ resp->status = DLB2_ST_INVALID_PORT_ID;
+ return -EINVAL;
+ }
+ }
+
+ /*
+ * If the queue's port is not configured, validate that a free
+ * port-queue pair is available.
+ */
+ if (args->port_id == -1 && list_empty(&domain->avail_dir_pq_pairs)) {
+ resp->status = DLB2_ST_DIR_QUEUES_UNAVAILABLE;
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void dlb2_configure_ldb_queue(struct dlb2_hw *hw,
+ struct dlb2_hw_domain *domain,
+ struct dlb2_ldb_queue *queue,
+ struct dlb2_create_ldb_queue_args *args,
+ bool vdev_req,
+ unsigned int vdev_id)
+{
+ union dlb2_sys_vf_ldb_vqid_v r0 = { {0} };
+ union dlb2_sys_vf_ldb_vqid2qid r1 = { {0} };
+ union dlb2_sys_ldb_qid2vqid r2 = { {0} };
+ union dlb2_sys_ldb_vasqid_v r3 = { {0} };
+ union dlb2_lsp_qid_ldb_infl_lim r4 = { {0} };
+ union dlb2_lsp_qid_aqed_active_lim r5 = { {0} };
+ union dlb2_aqed_pipe_qid_hid_width r6 = { {0} };
+ union dlb2_sys_ldb_qid_its r7 = { {0} };
+ union dlb2_lsp_qid_atm_depth_thrsh r8 = { {0} };
+ union dlb2_lsp_qid_naldb_depth_thrsh r9 = { {0} };
+ union dlb2_aqed_pipe_qid_fid_lim r10 = { {0} };
+ union dlb2_chp_ord_qid_sn_map r11 = { {0} };
+ union dlb2_sys_ldb_qid_cfg_v r12 = { {0} };
+ union dlb2_sys_ldb_qid_v r13 = { {0} };
+
+ struct dlb2_sn_group *sn_group;
+ unsigned int offs;
+
+ /* QID write permissions are turned on when the domain is started */
+ r3.field.vasqid_v = 0;
+
+ offs = domain->id.phys_id * DLB2_MAX_NUM_LDB_QUEUES +
+ queue->id.phys_id;
+
+ DLB2_CSR_WR(hw, DLB2_SYS_LDB_VASQID_V(offs), r3.val);
+
+ /*
+ * Unordered QIDs get 4K inflights, ordered get as many as the number
+ * of sequence numbers.
+ */
+ r4.field.limit = args->num_qid_inflights;
+
+ DLB2_CSR_WR(hw, DLB2_LSP_QID_LDB_INFL_LIM(queue->id.phys_id), r4.val);
+
+ r5.field.limit = queue->aqed_limit;
+
+ if (r5.field.limit > DLB2_MAX_NUM_AQED_ENTRIES)
+ r5.field.limit = DLB2_MAX_NUM_AQED_ENTRIES;
+
+ DLB2_CSR_WR(hw,
+ DLB2_LSP_QID_AQED_ACTIVE_LIM(queue->id.phys_id),
+ r5.val);
+
+ switch (args->lock_id_comp_level) {
+ case 64:
+ r6.field.compress_code = 1;
+ break;
+ case 128:
+ r6.field.compress_code = 2;
+ break;
+ case 256:
+ r6.field.compress_code = 3;
+ break;
+ case 512:
+ r6.field.compress_code = 4;
+ break;
+ case 1024:
+ r6.field.compress_code = 5;
+ break;
+ case 2048:
+ r6.field.compress_code = 6;
+ break;
+ case 4096:
+ r6.field.compress_code = 7;
+ break;
+ case 0:
+ case 65536:
+ r6.field.compress_code = 0;
+ }
+
+ DLB2_CSR_WR(hw,
+ DLB2_AQED_PIPE_QID_HID_WIDTH(queue->id.phys_id),
+ r6.val);
+
+ /* Don't timestamp QEs that pass through this queue */
+ r7.field.qid_its = 0;
+
+ DLB2_CSR_WR(hw,
+ DLB2_SYS_LDB_QID_ITS(queue->id.phys_id),
+ r7.val);
+
+ r8.field.thresh = args->depth_threshold;
+
+ DLB2_CSR_WR(hw,
+ DLB2_LSP_QID_ATM_DEPTH_THRSH(queue->id.phys_id),
+ r8.val);
+
+ r9.field.thresh = args->depth_threshold;
+
+ DLB2_CSR_WR(hw,
+ DLB2_LSP_QID_NALDB_DEPTH_THRSH(queue->id.phys_id),
+ r9.val);
+
+ /*
+ * This register limits the number of inflight flows a queue can have
+ * at one time. It has an upper bound of 2048, but can be
+ * over-subscribed. 512 is chosen so that a single queue doesn't use
+ * the entire atomic storage, but can use a substantial portion if
+ * needed.
+ */
+ r10.field.qid_fid_limit = 512;
+
+ DLB2_CSR_WR(hw,
+ DLB2_AQED_PIPE_QID_FID_LIM(queue->id.phys_id),
+ r10.val);
+
+ /* Configure SNs */
+ sn_group = &hw->rsrcs.sn_groups[queue->sn_group];
+ r11.field.mode = sn_group->mode;
+ r11.field.slot = queue->sn_slot;
+ r11.field.grp = sn_group->id;
+
+ DLB2_CSR_WR(hw, DLB2_CHP_ORD_QID_SN_MAP(queue->id.phys_id), r11.val);
+
+ r12.field.sn_cfg_v = (args->num_sequence_numbers != 0);
+ r12.field.fid_cfg_v = (args->num_atomic_inflights != 0);
+
+ DLB2_CSR_WR(hw, DLB2_SYS_LDB_QID_CFG_V(queue->id.phys_id), r12.val);
+
+ if (vdev_req) {
+ offs = vdev_id * DLB2_MAX_NUM_LDB_QUEUES + queue->id.virt_id;
+
+ r0.field.vqid_v = 1;
+
+ DLB2_CSR_WR(hw, DLB2_SYS_VF_LDB_VQID_V(offs), r0.val);
+
+ r1.field.qid = queue->id.phys_id;
+
+ DLB2_CSR_WR(hw, DLB2_SYS_VF_LDB_VQID2QID(offs), r1.val);
+
+ r2.field.vqid = queue->id.virt_id;
+
+ DLB2_CSR_WR(hw,
+ DLB2_SYS_LDB_QID2VQID(queue->id.phys_id),
+ r2.val);
+ }
+
+ r13.field.qid_v = 1;
+
+ DLB2_CSR_WR(hw, DLB2_SYS_LDB_QID_V(queue->id.phys_id), r13.val);
+}
+
+static void dlb2_configure_dir_queue(struct dlb2_hw *hw,
+ struct dlb2_hw_domain *domain,
+ struct dlb2_dir_pq_pair *queue,
+ struct dlb2_create_dir_queue_args *args,
+ bool vdev_req,
+ unsigned int vdev_id)
+{
+ union dlb2_sys_dir_vasqid_v r0 = { {0} };
+ union dlb2_sys_dir_qid_its r1 = { {0} };
+ union dlb2_lsp_qid_dir_depth_thrsh r2 = { {0} };
+ union dlb2_sys_dir_qid_v r5 = { {0} };
+
+ unsigned int offs;
+
+ /* QID write permissions are turned on when the domain is started */
+ r0.field.vasqid_v = 0;
+
+ offs = domain->id.phys_id * DLB2_MAX_NUM_DIR_QUEUES +
+ queue->id.phys_id;
+
+ DLB2_CSR_WR(hw, DLB2_SYS_DIR_VASQID_V(offs), r0.val);
+
+ /* Don't timestamp QEs that pass through this queue */
+ r1.field.qid_its = 0;
+
+ DLB2_CSR_WR(hw,
+ DLB2_SYS_DIR_QID_ITS(queue->id.phys_id),
+ r1.val);
+
+ r2.field.thresh = args->depth_threshold;
+
+ DLB2_CSR_WR(hw,
+ DLB2_LSP_QID_DIR_DEPTH_THRSH(queue->id.phys_id),
+ r2.val);
+
+ if (vdev_req) {
+ union dlb2_sys_vf_dir_vqid_v r3 = { {0} };
+ union dlb2_sys_vf_dir_vqid2qid r4 = { {0} };
+
+ offs = vdev_id * DLB2_MAX_NUM_DIR_QUEUES + queue->id.virt_id;
+
+ r3.field.vqid_v = 1;
+
+ DLB2_CSR_WR(hw, DLB2_SYS_VF_DIR_VQID_V(offs), r3.val);
+
+ r4.field.qid = queue->id.phys_id;
+
+ DLB2_CSR_WR(hw, DLB2_SYS_VF_DIR_VQID2QID(offs), r4.val);
+ }
+
+ r5.field.qid_v = 1;
+
+ DLB2_CSR_WR(hw, DLB2_SYS_DIR_QID_V(queue->id.phys_id), r5.val);
+
+ queue->queue_configured = true;
+}
+
static bool dlb2_port_find_slot(struct dlb2_ldb_port *port,
enum dlb2_qid_map_state state,
int *slot)
@@ -955,6 +1337,68 @@ dlb2_domain_attach_resources(struct dlb2_hw *hw,
return 0;
}

+static int
+dlb2_ldb_queue_attach_to_sn_group(struct dlb2_hw *hw,
+ struct dlb2_ldb_queue *queue,
+ struct dlb2_create_ldb_queue_args *args)
+{
+ int slot = -1;
+ int i;
+
+ queue->sn_cfg_valid = false;
+
+ if (args->num_sequence_numbers == 0)
+ return 0;
+
+ for (i = 0; i < DLB2_MAX_NUM_SEQUENCE_NUMBER_GROUPS; i++) {
+ struct dlb2_sn_group *group = &hw->rsrcs.sn_groups[i];
+
+ if (group->sequence_numbers_per_queue ==
+ args->num_sequence_numbers &&
+ !dlb2_sn_group_full(group)) {
+ slot = dlb2_sn_group_alloc_slot(group);
+ if (slot >= 0)
+ break;
+ }
+ }
+
+ if (slot == -1) {
+ DLB2_HW_ERR(hw,
+ "[%s():%d] Internal error: no sequence number slots available\n",
+ __func__, __LINE__);
+ return -EFAULT;
+ }
+
+ queue->sn_cfg_valid = true;
+ queue->sn_group = i;
+ queue->sn_slot = slot;
+ return 0;
+}
+
+static int
+dlb2_ldb_queue_attach_resources(struct dlb2_hw *hw,
+ struct dlb2_hw_domain *domain,
+ struct dlb2_ldb_queue *queue,
+ struct dlb2_create_ldb_queue_args *args)
+{
+ int ret;
+
+ ret = dlb2_ldb_queue_attach_to_sn_group(hw, queue, args);
+ if (ret)
+ return ret;
+
+ /* Attach QID inflights */
+ queue->num_qid_inflights = args->num_qid_inflights;
+
+ /* Attach atomic inflights */
+ queue->aqed_limit = args->num_atomic_inflights;
+
+ domain->num_avail_aqed_entries -= args->num_atomic_inflights;
+ domain->num_used_aqed_entries += args->num_atomic_inflights;
+
+ return 0;
+}
+
static void dlb2_ldb_port_cq_enable(struct dlb2_hw *hw,
struct dlb2_ldb_port *port)
{
@@ -1670,6 +2114,203 @@ int dlb2_hw_create_sched_domain(struct dlb2_hw *hw,
}

static void
+dlb2_log_create_ldb_queue_args(struct dlb2_hw *hw,
+ u32 domain_id,
+ struct dlb2_create_ldb_queue_args *args,
+ bool vdev_req,
+ unsigned int vdev_id)
+{
+ DLB2_HW_DBG(hw, "DLB2 create load-balanced queue arguments:\n");
+ if (vdev_req)
+ DLB2_HW_DBG(hw, "(Request from vdev %d)\n", vdev_id);
+ DLB2_HW_DBG(hw, "\tDomain ID: %d\n",
+ domain_id);
+ DLB2_HW_DBG(hw, "\tNumber of sequence numbers: %d\n",
+ args->num_sequence_numbers);
+ DLB2_HW_DBG(hw, "\tNumber of QID inflights: %d\n",
+ args->num_qid_inflights);
+ DLB2_HW_DBG(hw, "\tNumber of ATM inflights: %d\n",
+ args->num_atomic_inflights);
+}
+
+/**
+ * dlb2_hw_create_ldb_queue() - Allocate and initialize a DLB LDB queue.
+ * @hw: Contains the current state of the DLB2 hardware.
+ * @domain_id: Domain ID
+ * @args: User-provided arguments.
+ * @resp: Response to user.
+ * @vdev_req: Request came from a virtual device.
+ * @vdev_id: If vdev_req is true, this contains the virtual device's ID.
+ *
+ * Return: returns < 0 on error, 0 otherwise. If the driver is unable to
+ * satisfy a request, resp->status will be set accordingly.
+ */
+int dlb2_hw_create_ldb_queue(struct dlb2_hw *hw,
+ u32 domain_id,
+ struct dlb2_create_ldb_queue_args *args,
+ struct dlb2_cmd_response *resp,
+ bool vdev_req,
+ unsigned int vdev_id)
+{
+ struct dlb2_hw_domain *domain;
+ struct dlb2_ldb_queue *queue;
+ int ret;
+
+ dlb2_log_create_ldb_queue_args(hw, domain_id, args, vdev_req, vdev_id);
+
+ /*
+ * Verify that hardware resources are available before attempting to
+ * satisfy the request. This simplifies the error unwinding code.
+ */
+ ret = dlb2_verify_create_ldb_queue_args(hw,
+ domain_id,
+ args,
+ resp,
+ vdev_req,
+ vdev_id);
+ if (ret)
+ return ret;
+
+ domain = dlb2_get_domain_from_id(hw, domain_id, vdev_req, vdev_id);
+ if (!domain) {
+ DLB2_HW_ERR(hw,
+ "[%s():%d] Internal error: domain not found\n",
+ __func__, __LINE__);
+ return -EFAULT;
+ }
+
+ queue = DLB2_DOM_LIST_HEAD(domain->avail_ldb_queues, typeof(*queue));
+
+ if (!queue) {
+ DLB2_HW_ERR(hw,
+ "[%s():%d] Internal error: no available ldb queues\n",
+ __func__, __LINE__);
+ return -EFAULT;
+ }
+
+ ret = dlb2_ldb_queue_attach_resources(hw, domain, queue, args);
+ if (ret < 0) {
+ DLB2_HW_ERR(hw,
+ "[%s():%d] Internal error: failed to attach the ldb queue resources\n",
+ __func__, __LINE__);
+ return ret;
+ }
+
+ dlb2_configure_ldb_queue(hw, domain, queue, args, vdev_req, vdev_id);
+
+ queue->num_mappings = 0;
+
+ queue->configured = true;
+
+ /*
+ * Configuration succeeded, so move the resource from the 'avail' to
+ * the 'used' list.
+ */
+ list_del(&queue->domain_list);
+
+ list_add(&queue->domain_list, &domain->used_ldb_queues);
+
+ resp->status = 0;
+ resp->id = (vdev_req) ? queue->id.virt_id : queue->id.phys_id;
+
+ return 0;
+}
+
+static void
+dlb2_log_create_dir_queue_args(struct dlb2_hw *hw,
+ u32 domain_id,
+ struct dlb2_create_dir_queue_args *args,
+ bool vdev_req,
+ unsigned int vdev_id)
+{
+ DLB2_HW_DBG(hw, "DLB2 create directed queue arguments:\n");
+ if (vdev_req)
+ DLB2_HW_DBG(hw, "(Request from vdev %d)\n", vdev_id);
+ DLB2_HW_DBG(hw, "\tDomain ID: %d\n", domain_id);
+ DLB2_HW_DBG(hw, "\tPort ID: %d\n", args->port_id);
+}
+
+/**
+ * dlb2_hw_create_dir_queue() - Allocate and initialize a DLB DIR queue.
+ * @hw: Contains the current state of the DLB2 hardware.
+ * @domain_id: Domain ID
+ * @args: User-provided arguments.
+ * @resp: Response to user.
+ * @vdev_req: Request came from a virtual device.
+ * @vdev_id: If vdev_req is true, this contains the virtual device's ID.
+ *
+ * Return: returns < 0 on error, 0 otherwise. If the driver is unable to
+ * satisfy a request, resp->status will be set accordingly.
+ */
+int dlb2_hw_create_dir_queue(struct dlb2_hw *hw,
+ u32 domain_id,
+ struct dlb2_create_dir_queue_args *args,
+ struct dlb2_cmd_response *resp,
+ bool vdev_req,
+ unsigned int vdev_id)
+{
+ struct dlb2_dir_pq_pair *queue;
+ struct dlb2_hw_domain *domain;
+ int ret;
+
+ dlb2_log_create_dir_queue_args(hw, domain_id, args, vdev_req, vdev_id);
+
+ /*
+ * Verify that hardware resources are available before attempting to
+ * satisfy the request. This simplifies the error unwinding code.
+ */
+ ret = dlb2_verify_create_dir_queue_args(hw,
+ domain_id,
+ args,
+ resp,
+ vdev_req,
+ vdev_id);
+ if (ret)
+ return ret;
+
+ domain = dlb2_get_domain_from_id(hw, domain_id, vdev_req, vdev_id);
+ if (!domain) {
+ DLB2_HW_ERR(hw,
+ "[%s():%d] Internal error: domain not found\n",
+ __func__, __LINE__);
+ return -EFAULT;
+ }
+
+ if (args->port_id != -1)
+ queue = dlb2_get_domain_used_dir_pq(args->port_id,
+ vdev_req,
+ domain);
+ else
+ queue = DLB2_DOM_LIST_HEAD(domain->avail_dir_pq_pairs,
+ typeof(*queue));
+
+ if (!queue) {
+ DLB2_HW_ERR(hw,
+ "[%s():%d] Internal error: no available dir queues\n",
+ __func__, __LINE__);
+ return -EFAULT;
+ }
+
+ dlb2_configure_dir_queue(hw, domain, queue, args, vdev_req, vdev_id);
+
+ /*
+ * Configuration succeeded, so move the resource from the 'avail' to
+ * the 'used' list (if it's not already there).
+ */
+ if (args->port_id == -1) {
+ list_del(&queue->domain_list);
+
+ list_add(&queue->domain_list, &domain->used_dir_pq_pairs);
+ }
+
+ resp->status = 0;
+
+ resp->id = (vdev_req) ? queue->id.virt_id : queue->id.phys_id;
+
+ return 0;
+}
+
+static void
dlb2_domain_finish_unmap_port_slot(struct dlb2_hw *hw,
struct dlb2_hw_domain *domain,
struct dlb2_ldb_port *port,
@@ -2132,6 +2773,54 @@ static bool dlb2_dir_queue_is_empty(struct dlb2_hw *hw,
return dlb2_dir_queue_depth(hw, queue) == 0;
}

+static void dlb2_log_get_dir_queue_depth(struct dlb2_hw *hw,
+ u32 domain_id,
+ u32 queue_id,
+ bool vdev_req,
+ unsigned int vf_id)
+{
+ DLB2_HW_DBG(hw, "DLB get directed queue depth:\n");
+ if (vdev_req)
+ DLB2_HW_DBG(hw, "(Request from VF %d)\n", vf_id);
+ DLB2_HW_DBG(hw, "\tDomain ID: %d\n", domain_id);
+ DLB2_HW_DBG(hw, "\tQueue ID: %d\n", queue_id);
+}
+
+int dlb2_hw_get_dir_queue_depth(struct dlb2_hw *hw,
+ u32 domain_id,
+ struct dlb2_get_dir_queue_depth_args *args,
+ struct dlb2_cmd_response *resp,
+ bool vdev_req,
+ unsigned int vdev_id)
+{
+ struct dlb2_dir_pq_pair *queue;
+ struct dlb2_hw_domain *domain;
+ int id;
+
+ id = domain_id;
+
+ dlb2_log_get_dir_queue_depth(hw, domain_id, args->queue_id,
+ vdev_req, vdev_id);
+
+ domain = dlb2_get_domain_from_id(hw, id, vdev_req, vdev_id);
+ if (!domain) {
+ resp->status = DLB2_ST_INVALID_DOMAIN_ID;
+ return -EINVAL;
+ }
+
+ id = args->queue_id;
+
+ queue = dlb2_get_domain_used_dir_pq(id, vdev_req, domain);
+ if (!queue) {
+ resp->status = DLB2_ST_INVALID_QID;
+ return -EINVAL;
+ }
+
+ resp->id = dlb2_dir_queue_depth(hw, queue);
+
+ return 0;
+}
+
static u32 dlb2_ldb_queue_depth(struct dlb2_hw *hw,
struct dlb2_ldb_queue *queue)
{
@@ -2156,6 +2845,49 @@ static bool dlb2_ldb_queue_is_empty(struct dlb2_hw *hw,
return dlb2_ldb_queue_depth(hw, queue) == 0;
}

+static void dlb2_log_get_ldb_queue_depth(struct dlb2_hw *hw,
+ u32 domain_id,
+ u32 queue_id,
+ bool vdev_req,
+ unsigned int vf_id)
+{
+ DLB2_HW_DBG(hw, "DLB get load-balanced queue depth:\n");
+ if (vdev_req)
+ DLB2_HW_DBG(hw, "(Request from VF %d)\n", vf_id);
+ DLB2_HW_DBG(hw, "\tDomain ID: %d\n", domain_id);
+ DLB2_HW_DBG(hw, "\tQueue ID: %d\n", queue_id);
+}
+
+int dlb2_hw_get_ldb_queue_depth(struct dlb2_hw *hw,
+ u32 domain_id,
+ struct dlb2_get_ldb_queue_depth_args *args,
+ struct dlb2_cmd_response *resp,
+ bool vdev_req,
+ unsigned int vdev_id)
+{
+ struct dlb2_hw_domain *domain;
+ struct dlb2_ldb_queue *queue;
+
+ dlb2_log_get_ldb_queue_depth(hw, domain_id, args->queue_id,
+ vdev_req, vdev_id);
+
+ domain = dlb2_get_domain_from_id(hw, domain_id, vdev_req, vdev_id);
+ if (!domain) {
+ resp->status = DLB2_ST_INVALID_DOMAIN_ID;
+ return -EINVAL;
+ }
+
+ queue = dlb2_get_domain_ldb_queue(args->queue_id, vdev_req, domain);
+ if (!queue) {
+ resp->status = DLB2_ST_INVALID_QID;
+ return -EINVAL;
+ }
+
+ resp->id = dlb2_ldb_queue_depth(hw, queue);
+
+ return 0;
+}
+
static void __dlb2_domain_reset_ldb_port_registers(struct dlb2_hw *hw,
struct dlb2_ldb_port *port)
{
diff --git a/drivers/misc/dlb2/dlb2_resource.h b/drivers/misc/dlb2/dlb2_resource.h
index 212039c4554a..476230ffe4b6 100644
--- a/drivers/misc/dlb2/dlb2_resource.h
+++ b/drivers/misc/dlb2/dlb2_resource.h
@@ -70,6 +70,73 @@ int dlb2_hw_create_sched_domain(struct dlb2_hw *hw,
unsigned int vdev_id);

/**
+ * dlb2_hw_create_ldb_queue() - create a load-balanced queue
+ * @hw: dlb2_hw handle for a particular device.
+ * @domain_id: domain ID.
+ * @args: queue creation arguments.
+ * @resp: response structure.
+ * @vdev_request: indicates whether this request came from a vdev.
+ * @vdev_id: If vdev_request is true, this contains the vdev's ID.
+ *
+ * This function creates a load-balanced queue.
+ *
+ * A vdev can be either an SR-IOV virtual function or a Scalable IOV virtual
+ * device.
+ *
+ * Return:
+ * Returns 0 upon success, < 0 otherwise. If an error occurs, resp->status is
+ * assigned a detailed error code from enum dlb2_error. If successful, resp->id
+ * contains the queue ID.
+ *
+ * resp->id contains a virtual ID if vdev_request is true.
+ *
+ * Errors:
+ * EINVAL - A requested resource is unavailable, the domain is not configured,
+ * the domain has already been started, or the requested queue name is
+ * already in use.
+ * EFAULT - Internal error (resp->status not set).
+ */
+int dlb2_hw_create_ldb_queue(struct dlb2_hw *hw,
+ u32 domain_id,
+ struct dlb2_create_ldb_queue_args *args,
+ struct dlb2_cmd_response *resp,
+ bool vdev_request,
+ unsigned int vdev_id);
+
+/**
+ * dlb2_hw_create_dir_queue() - create a directed queue
+ * @hw: dlb2_hw handle for a particular device.
+ * @domain_id: domain ID.
+ * @args: queue creation arguments.
+ * @resp: response structure.
+ * @vdev_request: indicates whether this request came from a vdev.
+ * @vdev_id: If vdev_request is true, this contains the vdev's ID.
+ *
+ * This function creates a directed queue.
+ *
+ * A vdev can be either an SR-IOV virtual function or a Scalable IOV virtual
+ * device.
+ *
+ * Return:
+ * Returns 0 upon success, < 0 otherwise. If an error occurs, resp->status is
+ * assigned a detailed error code from enum dlb2_error. If successful, resp->id
+ * contains the queue ID.
+ *
+ * resp->id contains a virtual ID if vdev_request is true.
+ *
+ * Errors:
+ * EINVAL - A requested resource is unavailable, the domain is not configured,
+ * or the domain has already been started.
+ * EFAULT - Internal error (resp->status not set).
+ */
+int dlb2_hw_create_dir_queue(struct dlb2_hw *hw,
+ u32 domain_id,
+ struct dlb2_create_dir_queue_args *args,
+ struct dlb2_cmd_response *resp,
+ bool vdev_request,
+ unsigned int vdev_id);
+
+/**
* dlb2_reset_domain() - reset a scheduling domain
* @hw: dlb2_hw handle for a particular device.
* @domain_id: domain ID.
@@ -130,6 +197,64 @@ int dlb2_hw_get_num_resources(struct dlb2_hw *hw,
*/
void dlb2_clr_pmcsr_disable(struct dlb2_hw *hw);

+/**
+ * dlb2_hw_get_ldb_queue_depth() - returns the depth of a load-balanced queue
+ * @hw: dlb2_hw handle for a particular device.
+ * @domain_id: domain ID.
+ * @args: queue depth args
+ * @resp: response structure.
+ * @vdev_request: indicates whether this request came from a vdev.
+ * @vdev_id: If vdev_request is true, this contains the vdev's ID.
+ *
+ * This function returns the depth of a load-balanced queue.
+ *
+ * A vdev can be either an SR-IOV virtual function or a Scalable IOV virtual
+ * device.
+ *
+ * Return:
+ * Returns 0 upon success, < 0 otherwise. If an error occurs, resp->status is
+ * assigned a detailed error code from enum dlb2_error. If successful, resp->id
+ * contains the depth.
+ *
+ * Errors:
+ * EINVAL - Invalid domain ID or queue ID.
+ */
+int dlb2_hw_get_ldb_queue_depth(struct dlb2_hw *hw,
+ u32 domain_id,
+ struct dlb2_get_ldb_queue_depth_args *args,
+ struct dlb2_cmd_response *resp,
+ bool vdev_request,
+ unsigned int vdev_id);
+
+/**
+ * dlb2_hw_get_dir_queue_depth() - returns the depth of a directed queue
+ * @hw: dlb2_hw handle for a particular device.
+ * @domain_id: domain ID.
+ * @args: queue depth args
+ * @resp: response structure.
+ * @vdev_request: indicates whether this request came from a vdev.
+ * @vdev_id: If vdev_request is true, this contains the vdev's ID.
+ *
+ * This function returns the depth of a directed queue.
+ *
+ * A vdev can be either an SR-IOV virtual function or a Scalable IOV virtual
+ * device.
+ *
+ * Return:
+ * Returns 0 upon success, < 0 otherwise. If an error occurs, resp->status is
+ * assigned a detailed error code from enum dlb2_error. If successful, resp->id
+ * contains the depth.
+ *
+ * Errors:
+ * EINVAL - Invalid domain ID or queue ID.
+ */
+int dlb2_hw_get_dir_queue_depth(struct dlb2_hw *hw,
+ u32 domain_id,
+ struct dlb2_get_dir_queue_depth_args *args,
+ struct dlb2_cmd_response *resp,
+ bool vdev_request,
+ unsigned int vdev_id);
+
enum dlb2_virt_mode {
DLB2_VIRT_NONE,
DLB2_VIRT_SRIOV,
diff --git a/include/uapi/linux/dlb2_user.h b/include/uapi/linux/dlb2_user.h
index 95e0d2672abf..04c469e09529 100644
--- a/include/uapi/linux/dlb2_user.h
+++ b/include/uapi/linux/dlb2_user.h
@@ -308,6 +308,132 @@ enum dlb2_user_interface_commands {
NUM_DLB2_CMD,
};

+/*********************************/
+/* 'domain' device file commands */
+/*********************************/
+
+/*
+ * DLB2_DOMAIN_CMD_CREATE_LDB_QUEUE: Configure a load-balanced queue.
+ * Input parameters:
+ * - num_atomic_inflights: This specifies the amount of temporary atomic QE
+ * storage for this queue. If zero, the queue will not support atomic
+ * scheduling.
+ * - num_sequence_numbers: This specifies the number of sequence numbers used
+ * by this queue. If zero, the queue will not support ordered scheduling.
+ * If non-zero, the queue will not support unordered scheduling.
+ * - num_qid_inflights: The maximum number of QEs that can be inflight
+ * (scheduled to a CQ but not completed) at any time. If
+ * num_sequence_numbers is non-zero, num_qid_inflights must be set equal
+ * to num_sequence_numbers.
+ * - lock_id_comp_level: Lock ID compression level. Specifies the number of
+ * unique lock IDs the queue should compress down to. Valid compression
+ * levels: 0, 64, 128, 256, 512, 1k, 2k, 4k, 64k. If lock_id_comp_level is
+ * 0, the queue won't compress its lock IDs.
+ * - depth_threshold: DLB sets two bits in the received QE to indicate the
+ * depth of the queue relative to the threshold before scheduling the
+ * QE to a CQ:
+ * - 2’b11: depth > threshold
+ * - 2’b10: threshold >= depth > 0.75 * threshold
+ * - 2’b01: 0.75 * threshold >= depth > 0.5 * threshold
+ * - 2’b00: depth <= 0.5 * threshold
+ * - padding0: Reserved for future use.
+ *
+ * Output parameters:
+ * - response: pointer to a struct dlb2_cmd_response.
+ * response.status: Detailed error code. In certain cases, such as if the
+ * response pointer is invalid, the driver won't set status.
+ * response.id: Queue ID.
+ */
+struct dlb2_create_ldb_queue_args {
+ /* Output parameters */
+ __u64 response;
+ /* Input parameters */
+ __u32 num_sequence_numbers;
+ __u32 num_qid_inflights;
+ __u32 num_atomic_inflights;
+ __u32 lock_id_comp_level;
+ __u32 depth_threshold;
+ __u32 padding0;
+};
+
+/*
+ * DLB2_DOMAIN_CMD_CREATE_DIR_QUEUE: Configure a directed queue.
+ * Input parameters:
+ * - port_id: Port ID. If the corresponding directed port is already created,
+ * specify its ID here. Else this argument must be 0xFFFFFFFF to indicate
+ * that the queue is being created before the port.
+ * - depth_threshold: DLB sets two bits in the received QE to indicate the
+ * depth of the queue relative to the threshold before scheduling the
+ * QE to a CQ:
+ * - 2’b11: depth > threshold
+ * - 2’b10: threshold >= depth > 0.75 * threshold
+ * - 2’b01: 0.75 * threshold >= depth > 0.5 * threshold
+ * - 2’b00: depth <= 0.5 * threshold
+ *
+ * Output parameters:
+ * - response: pointer to a struct dlb2_cmd_response.
+ * response.status: Detailed error code. In certain cases, such as if the
+ * response pointer is invalid, the driver won't set status.
+ * response.id: Queue ID.
+ */
+struct dlb2_create_dir_queue_args {
+ /* Output parameters */
+ __u64 response;
+ /* Input parameters */
+ __s32 port_id;
+ __u32 depth_threshold;
+};
+
+/*
+ * DLB2_DOMAIN_CMD_GET_LDB_QUEUE_DEPTH: Get a load-balanced queue's depth.
+ * Input parameters:
+ * - queue_id: The load-balanced queue ID.
+ * - padding0: Reserved for future use.
+ *
+ * Output parameters:
+ * - response: pointer to a struct dlb2_cmd_response.
+ * response.status: Detailed error code. In certain cases, such as if the
+ * response pointer is invalid, the driver won't set status.
+ * response.id: queue depth.
+ */
+struct dlb2_get_ldb_queue_depth_args {
+ /* Output parameters */
+ __u64 response;
+ /* Input parameters */
+ __u32 queue_id;
+ __u32 padding0;
+};
+
+/*
+ * DLB2_DOMAIN_CMD_DIR_QUEUE_DEPTH: Get a directed queue's depth.
+ * Input parameters:
+ * - queue_id: The directed queue ID.
+ * - padding0: Reserved for future use.
+ *
+ * Output parameters:
+ * - response: pointer to a struct dlb2_cmd_response.
+ * response.status: Detailed error code. In certain cases, such as if the
+ * response pointer is invalid, the driver won't set status.
+ * response.id: queue depth.
+ */
+struct dlb2_get_dir_queue_depth_args {
+ /* Output parameters */
+ __u64 response;
+ /* Input parameters */
+ __u32 queue_id;
+ __u32 padding0;
+};
+
+enum dlb2_domain_user_interface_commands {
+ DLB2_DOMAIN_CMD_CREATE_LDB_QUEUE,
+ DLB2_DOMAIN_CMD_CREATE_DIR_QUEUE,
+ DLB2_DOMAIN_CMD_GET_LDB_QUEUE_DEPTH,
+ DLB2_DOMAIN_CMD_GET_DIR_QUEUE_DEPTH,
+
+ /* NUM_DLB2_DOMAIN_CMD must be last */
+ NUM_DLB2_DOMAIN_CMD,
+};
+
/********************/
/* dlb2 ioctl codes */
/********************/
@@ -334,5 +460,21 @@ enum dlb2_user_interface_commands {
_IOWR(DLB2_IOC_MAGIC, \
DLB2_CMD_GET_DRIVER_VERSION, \
struct dlb2_get_driver_version_args)
+#define DLB2_IOC_CREATE_LDB_QUEUE \
+ _IOWR(DLB2_IOC_MAGIC, \
+ DLB2_DOMAIN_CMD_CREATE_LDB_QUEUE, \
+ struct dlb2_create_ldb_queue_args)
+#define DLB2_IOC_CREATE_DIR_QUEUE \
+ _IOWR(DLB2_IOC_MAGIC, \
+ DLB2_DOMAIN_CMD_CREATE_DIR_QUEUE, \
+ struct dlb2_create_dir_queue_args)
+#define DLB2_IOC_GET_LDB_QUEUE_DEPTH \
+ _IOWR(DLB2_IOC_MAGIC, \
+ DLB2_DOMAIN_CMD_GET_LDB_QUEUE_DEPTH, \
+ struct dlb2_get_ldb_queue_depth_args)
+#define DLB2_IOC_GET_DIR_QUEUE_DEPTH \
+ _IOWR(DLB2_IOC_MAGIC, \
+ DLB2_DOMAIN_CMD_GET_DIR_QUEUE_DEPTH, \
+ struct dlb2_get_dir_queue_depth_args)

#endif /* __DLB2_USER_H */
--
2.13.6