Function dlb2_resource_init

dpdk/drivers/event/dlb2/pf/base/dlb2_resource.c:110–253

* dlb2_resource_init() - initialize the device * @hw: pointer to struct dlb2_hw. * @ver: device version. * * This function initializes the device's software state (pointed to by the hw * argument) and programs global scheduling QoS registers. This function should * be called during driver initialization, and the dlb2_hw structure should * be zero-initialized before calling the function. *

 * Returns 0 upon success, <0 otherwise.
 */
int dlb2_resource_init(struct dlb2_hw *hw, enum dlb2_hw_ver ver, const void *probe_args)
{
	const struct dlb2_devargs *args = (const struct dlb2_devargs *)probe_args;
	bool ldb_port_default = args ? args->default_ldb_port_allocation : false;
	struct dlb2_list_entry *list;
	unsigned int i;
	int ret;

	/*
	 * For optimal load-balancing, ports that map to one or more QIDs in
	 * common should not be in numerical sequence. The port->QID mapping is
	 * application dependent, but the driver interleaves port IDs as much
	 * as possible to reduce the likelihood of sequential ports mapping to
	 * the same QID(s). This initial allocation of port IDs maximizes the
	 * average distance between an ID and its immediate neighbors (i.e.
	 * the distance from 1 to 0 and to 2, the distance from 2 to 1 and to
	 * 3, etc.).
	 */

	const u8 init_ldb_port_allocation[DLB2_MAX_NUM_LDB_PORTS] = {
		0,  7,  14,  5, 12,  3, 10,  1,  8, 15,  6, 13,  4, 11,  2,  9,
		16, 23, 30, 21, 28, 19, 26, 17, 24, 31, 22, 29, 20, 27, 18, 25,
		32, 39, 46, 37, 44, 35, 42, 33, 40, 47, 38, 45, 36, 43, 34, 41,
		48, 55, 62, 53, 60, 51, 58, 49, 56, 63, 54, 61, 52, 59, 50, 57,
	};

	hw->ver = ver;

	dlb2_init_fn_rsrc_lists(&hw->pf);

	for (i = 0; i < DLB2_MAX_NUM_VDEVS; i++)
		dlb2_init_fn_rsrc_lists(&hw->vdev[i]);

	for (i = 0; i < DLB2_MAX_NUM_DOMAINS; i++) {
		dlb2_init_domain_rsrc_lists(&hw->domains[i]);
		hw->domains[i].parent_func = &hw->pf;
	}

	/* Give all resources to the PF driver */
	hw->pf.num_avail_domains = DLB2_MAX_NUM_DOMAINS;
	for (i = 0; i < hw->pf.num_avail_domains; i++) {
		list = &hw->domains[i].func_list;

		dlb2_list_add(&hw->pf.avail_domains, list);
	}

	hw->pf.num_avail_ldb_queues = DLB2_MAX_NUM_LDB_QUEUES;
	for (i = 0; i < hw->pf.num_avail_ldb_queues; i++) {
		list = &hw->rsrcs.ldb_queues[i].func_list;

		dlb2_list_add(&hw->pf.avail_ldb_queues, list);
	}

	for (i = 0; i < DLB2_NUM_COS_DOMAINS; i++)
		hw->pf.num_avail_ldb_ports[i] =
			DLB2_MAX_NUM_LDB_PORTS / DLB2_NUM_COS_DOMAINS;

	for (i = 0; i < DLB2_MAX_NUM_LDB_PORTS; i++) {