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/* [ICS VERSION STRING: unknown] */

//===========================================================================//
//									     //
// DESCRIPTION								     //
//   Functions to implement Set/Get and programming of buffer control Tables //
//									     //
//===========================================================================//


#include <stdlib.h>
#include <string.h>

#include "ib_status.h"
#include "os_g.h"
#include "iba/stl_sm_priv.h"
#include "sm_l.h"

static Status_t
sm_get_mkey(Node_t *nodep, uint64_t *mkey, uint8_t portNum)
{
	Port_t *portp;
	uint8_t p;
	if (nodep->nodeInfo.NodeType == NI_TYPE_SWITCH) {
		p = 0;
	} else {
		p = portNum;
	}
	if ((portp = sm_get_port(nodep, p)) == NULL) {
		cs_log(VS_LOG_ERROR, "sm_get_mkey",
			"Failed to find mkey for for node %s ; port %u",
			sm_nodeDescString(nodep), p);
		return (VSTATUS_NODEV);
	}
	*mkey = (portp->portData->portInfo.M_Key==0) ? sm_config.mkey : portp->portData->portInfo.M_Key;
	return (VSTATUS_OK);
}

Status_t
sm_get_buffer_control_tables(IBhandle_t fd_topology, Node_t *nodep,
						uint8_t start_port, uint8_t end_port)
{
	int port;
	Status_t status = FERROR;
	unsigned char *path;
	uint8_t num_ports;
	STL_BUFFER_CONTROL_TABLE *pbct;
    uint8 maxcount = STL_NUM_BFRCTLTAB_BLOCKS_PER_DRSMP;
	Port_t *portp;

	if (!nodep || !start_port || start_port > end_port) {
		cs_log(VS_LOG_ERROR, "sm_get_buffer_control_table",
				"Invalid Parameters for node %s ; %p, %u, %u",
				nodep?sm_nodeDescString(nodep):"<NULL>", nodep, start_port, end_port);
		return (VSTATUS_ILLPARM);
	}


	num_ports = (end_port - start_port) +1;
	pbct = malloc(num_ports * sizeof(STL_BUFFER_CONTROL_TABLE));
	if (!pbct) {
		cs_log(VS_LOG_ERROR, "sm_get_buffer_control_table",
				"Failed to allocate buffer control table; node %s; no memory",
				sm_nodeDescString(nodep));
		return (VSTATUS_NOMEM);
	}

	port = nodep->nodeInfo.NodeType == NI_TYPE_CA ? start_port : 0;
	portp = sm_get_port(nodep, port);
	if (!sm_valid_port(portp)) {
		cs_log(VS_LOG_VERBOSE, "sm_get_buffer_control_table",
			   "Failed to get Port %d of node %s",
			   port, sm_nodeDescString(nodep));
		free(pbct);
		return VSTATUS_BAD;
	}
	path = PathToPort(nodep, portp);

	/*
	 * FIXME Optimization:
	 * this could be updated to query only ports which are LinkUp.
	 * But that makes the block algorithm much more difficult and for most
	 * large fabrics you will only be missing a small number of links which
	 * means it is likely just as efficient to query all ports in large ranges.
	 */
	for (port = start_port; port <= end_port; port += maxcount) {
		uint8_t n = MIN(maxcount, (end_port - port)+1);
		uint32_t am = (n << 24) | port;
		STL_BUFFER_CONTROL_TABLE *buf = &pbct[port-start_port];

		status = SM_Get_BufferControlTable(fd_topology, am, path, buf);
		if (status != VSTATUS_OK) {
			cs_log(VS_LOG_ERROR, "sm_get_buffer_control_table",
					"buffer control table query failed; node %s; %s",
					sm_nodeDescString(nodep),
					cs_convert_status (status));
			goto error;
		}
	}

	for (port = start_port; port <= end_port; port++) {
		portp = sm_get_port(nodep, port);
		if (!sm_valid_port(portp)) {
			cs_log(VS_LOG_VERBOSE, "sm_get_buffer_control_tables",
				   "Failed to get port %d of node %s",
				   port, sm_nodeDescString(nodep));
			continue;
		}
		memcpy(&portp->portData->bufCtrlTable, &(pbct[port-start_port]),
			sizeof(portp->portData->bufCtrlTable));
	}

error:
	free(pbct);
	return (status);
}


Status_t
sm_set_buffer_control_tables(IBhandle_t fd_topology, Node_t *nodep,
						uint8_t start_port, uint8_t end_port,
						STL_BUFFER_CONTROL_TABLE bcts[],
						uint8_t uniform_bcts)
{
	Status_t status = VSTATUS_OK;
    uint8 maxcount = STL_NUM_BFRCTLTAB_BLOCKS_PER_LID_SMP;
	uint16_t port;
	uint8_t num_ports;
	uint64_t mkey;
	uint32_t madStatus;
	extern char * sm_getMadStatusText(uint16_t status);
	Port_t *destPortp;
	uint32_t dlid = 0;

	IB_ENTER(__func__, nodep, start_port, end_port, 0);

	if (!nodep || start_port > end_port) {
		cs_log(VS_LOG_ERROR, "sm_set_buffer_control_table",
				"Invalid Parameters for node %s ; %p, ports %u - %u",
				nodep?sm_nodeDescString(nodep):"<NULL>", nodep, start_port, end_port);
		return (VSTATUS_ILLPARM);
	}

	num_ports = (end_port - start_port) +1;

	if (nodep->nodeInfo.NodeType == NI_TYPE_CA && num_ports > 1 ) {
		cs_log(VS_LOG_ERROR, "sm_set_buffer_control_table",
			"Failed to Set(BufferControlTable) (HFI %s) num_ports > 1 (%d)",
			sm_nodeDescString(nodep), num_ports);
		return (VSTATUS_ILLPARM);
	}

	if ((status = sm_get_mkey(nodep, &mkey, start_port)) != VSTATUS_OK)
		return (status);

	port = nodep->nodeInfo.NodeType == NI_TYPE_CA ? start_port : 0;
	destPortp = sm_get_port(nodep, port);
	if (!sm_valid_port(destPortp)) {
		cs_log(VS_LOG_VERBOSE, "sm_set_buffer_control_table",
			   "Failed to get Port %d of node %s",
			   port, sm_nodeDescString(nodep));
		return VSTATUS_BAD;
	}

	dlid = destPortp->portData->lid;

	if (uniform_bcts) {
		// All the ports have identical BCts, so send one block with the all
		// ports bit set.
		uint32_t amod = (1<<24) + (1<<8) + start_port;
		status = SM_Set_BufferControlTable_LR(fd_topology, amod, sm_lid,
			dlid, &bcts[0], mkey, &madStatus);
		if (status != VSTATUS_OK) {
			cs_log(VS_LOG_ERROR, "sm_set_buffer_control_table",
				"buffer control table query failed; node %s; %s (madStatus=%s)",
				sm_nodeDescString(nodep),
				cs_convert_status (status), sm_getMadStatusText(madStatus));
			goto error;
		} else {
			/**
			 * If the Set was successful update port data
			 */
			for (port = start_port; port <= end_port; port++) {
				Port_t *portp;
				portp = sm_get_port(nodep, port);
				if (!sm_valid_port(portp)) {
					cs_log(VS_LOG_VERBOSE, "sm_set_buffer_control_table",
									"Failed to get port %d of node %s",
									port, sm_nodeDescString(nodep));
					continue;
				}
				memcpy(&portp->portData->bufCtrlTable, &bcts[0],
								sizeof(portp->portData->bufCtrlTable));
			}
		}
	} else {
		// Send the BCTs in the fewest MADs possible. A single MAD can hold
		// up to maxcount BCTs, but may hold fewer because we need to omit
		// ports that are not up.
		//
		// In this loop, the value of num_ports is the # of BCTs that can be
		// sent in the next MAD, including the current port. We may end up
		// sending less than that if the current port is not valid or isn't up.
		for (num_ports = 1, port = start_port; port <= end_port;
			num_ports++, port ++) {
			Port_t *portp = sm_get_port(nodep, port);

			if (!sm_valid_port(portp)) {
				cs_log(VS_LOG_VERBOSE, "sm_set_buffer_control_table",
					"Failed to get port %d of node %s",
					port, sm_nodeDescString(nodep));
			}

			if (!sm_valid_port(portp) || (portp->state < IB_PORT_INIT)) {
				// We have to skip down ports, so send what we have, not
				// including the bad port.  If this is the only port
				// (num_ports == 1) then skip the send.
				if (num_ports > 1) {
					uint16_t first_port = port - num_ports + 1;
					STL_BUFFER_CONTROL_TABLE *buf = &bcts[first_port-start_port];
					uint32_t amod = ((num_ports-1)<<24) | first_port;

					status = SM_Set_BufferControlTable_LR(fd_topology, amod,
						sm_lid, dlid, buf, mkey, &madStatus);
					if (status != VSTATUS_OK) {
						cs_log(VS_LOG_ERROR, "sm_set_buffer_control_table",
										"buffer control table query failed; node %s; %s (madStatus=%s)",
										sm_nodeDescString(nodep),
										cs_convert_status (status), sm_getMadStatusText(madStatus));
						goto error;
					} else {
						/*
						 * If the Set was successful update port data
						 */
						uint8_t p;
						for (p = first_port; p < port; p++) {
							Port_t *portp2 = sm_get_port(nodep, p);
							if (sm_valid_port(portp2)) {
								memcpy(&portp2->portData->bufCtrlTable, &buf[p-first_port],
												sizeof(portp2->portData->bufCtrlTable));
							}
						}
					}
				}

				// Note that this will get set back to 1 by the for loop.
				num_ports = 0;
			} else if ((num_ports == maxcount) || port == end_port) {
				// Unlike the previous case, here we include the current port.
				uint16_t first_port = port - num_ports + 1;
				STL_BUFFER_CONTROL_TABLE *buf = &bcts[first_port-start_port];
				uint32_t amod = (num_ports<<24) | first_port;

				status = SM_Set_BufferControlTable_LR(fd_topology, amod, sm_lid, dlid, buf, mkey, &madStatus);
				if (status != VSTATUS_OK) {
					cs_log(VS_LOG_ERROR, "sm_set_buffer_control_table",
						"buffer control table query failed; node %s; %s (madStatus=%s)",
						sm_nodeDescString(nodep),
						cs_convert_status (status), sm_getMadStatusText(madStatus));
					goto error;
				} else {
					/*
					 * If the Set was successful update port data
					 */
					uint8_t p;
					for (p = first_port; p <= port; p++) {
						Port_t *portp2 = sm_get_port(nodep, p);
						memcpy(&portp2->portData->bufCtrlTable, &buf[p-first_port],
							sizeof(portp2->portData->bufCtrlTable));
					}
				}

				// Note that this will get set back to 1 by the for loop.
				num_ports = 0;
			}
		}
	}

error:
	return (status);
}
