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#include "mvOs.h"
#include "mvCommon.h"
#include "mv802_3.h"
#ifndef CONFIG_OF
#include "ctrlEnv/mvCtrlEnvLib.h"
#endif

#include "gbe/mvNetaRegs.h"
#include "gbe/mvEthRegs.h"

#include "mvPnc.h"
#include "mvTcam.h"

#ifdef CONFIG_MV_ETH_PNC_L3_FLOW
int first_2tuple_rule = TE_FLOW_L3_END + 1;
int last_5tuple_rule = TE_FLOW_L3 - 1;

extern int pnc_port_mask_check(unsigned int mask, int eth_port);

static INLINE struct tcam_entry *pnc_create_2t_entry(unsigned int sip, unsigned int dip)
{
	struct tcam_entry *te = tcam_sw_alloc(TCAM_LU_FLOW_IP4);

	tcam_sw_set_byte(te, 12, (sip >> 0) & 0xFF);
	tcam_sw_set_byte(te, 13, (sip >> 8) & 0xFF);
	tcam_sw_set_byte(te, 14, (sip >> 16) & 0xFF);
	tcam_sw_set_byte(te, 15, (sip >> 24) & 0xFF);

	tcam_sw_set_byte(te, 16, (dip >> 0) & 0xFF);
	tcam_sw_set_byte(te, 17, (dip >> 8) & 0xFF);
	tcam_sw_set_byte(te, 18, (dip >> 16) & 0xFF);
	tcam_sw_set_byte(te, 19, (dip >> 24) & 0xFF);

	return te;
}

static INLINE int tcam_sw_cmp_2tuple(struct tcam_entry *te, unsigned int sip, unsigned int dip)
{
	return !((tcam_sw_cmp_bytes(te, 12, 4, (unsigned char *)&sip) == 0)
			&& (tcam_sw_cmp_bytes(te, 16, 4, (unsigned char *)&dip) == 0));
}

static INLINE int tcam_sw_cmp_5tuple(struct tcam_entry *te, unsigned int sip, unsigned int dip,
								unsigned int ports, unsigned int proto)
{
	if (tcam_sw_cmp_2tuple(te, sip, dip) != 0)
		return 1;

	return !((tcam_sw_cmp_bytes(te, 9, 1, (unsigned char *)&proto) == 0) &&
			(tcam_sw_cmp_bytes(te, 20, 2, (unsigned char *)&ports) == 0));
}
#endif /* CONFIG_MV_ETH_PNC_L3_FLOW */

static INLINE int pnc_mask_to_port(unsigned int mask)
{
#ifdef CONFIG_ARCH_FEROCEON_KW2
	switch (mask) {
	case 27:
		return 0;
	case 15:
		return 1;
	case 30:
		return 2;
	default:
		return -1;
	}
#else
	switch (mask) {
	case 30:
		return 0;
	case 15:
		return 1;
	case 27:
		return 2;
	case 23:
		return 3;
	default:
		return -1;
	}
#endif /* MV_ETH_PNC_NEW */
}

/*
 * pnc_ip4_2tuple - Add 2-tuple priority rules
 */
int pnc_ip4_2tuple_rxq(unsigned int eth_port, unsigned int sip, unsigned int dip, int rxq)
{
#ifdef CONFIG_MV_ETH_PNC_L3_FLOW
	struct tcam_entry *te;
	unsigned int pdata, pmask;
	int tid, empty = -1, min_index_occupied = TE_FLOW_L3_END + 1;

	if (rxq < -2 || rxq >= CONFIG_MV_ETH_RXQ || eth_port >= CONFIG_MV_ETH_PORTS_NUM)
		return 1;

	for (tid = TE_FLOW_L3_END; tid > last_5tuple_rule; tid--) {
		te = pnc_tcam_entry_get(tid);
		/* Remember first Empty entry */
		if (te == NULL) {
			if (empty == -1)
				empty = tid;
			continue;
		}

		/* Find existing entry for this rule */
		if (tcam_sw_cmp_2tuple(te, sip, dip) == 0) {
			tcam_sw_get_port(te, &pdata, &pmask);
			if (rxq == -2) { /* delete rule */
				if (!pnc_port_mask_check(pmask, eth_port)) {
					printk(KERN_ERR "%s: rule is not associated with this port (%d)\n", __func__, eth_port);
					tcam_sw_free(te);
					return 1;
				}
				if (first_2tuple_rule == tid)
					first_2tuple_rule = min_index_occupied;
				pnc_te_del(tid);
				tcam_sw_free(te);
				return 0;
			}

			if (!pnc_port_mask_check(pmask, eth_port)) { /* rule is already associated with another port */
				printk(KERN_ERR "%s: rule is already associated with port %d\n",
									__func__, pnc_mask_to_port(pmask));
				return 1;
			}
			if (rxq == -1) { /* set rule to drop mode */
				sram_sw_set_rinfo(te, RI_DROP, RI_DROP);
				sram_sw_set_lookup_done(te, 1);
				tcam_hw_write(te, tid);
			} else { /* update rxq */
				sram_sw_set_rinfo(te, 0, RI_DROP);
				sram_sw_set_rinfo(te, RI_L3_FLOW, RI_L3_FLOW);
				sram_sw_set_rxq(te, rxq, 0);
				tcam_hw_write(te, tid);
			}

			tcam_sw_free(te);
			return 0;
		}
		min_index_occupied = tid;
		tcam_sw_free(te);
	}

	/* Add rule to PNC */
	if (rxq == -2) {
		mvOsPrintf("%s: Entry not found - sip=0x%x, dip=0x%x, rxq=%d\n", __func__, sip, dip, rxq);
		return 1;
	}
	/* Not found existing entry and no free TCAM entry - Failed */
	if ((empty == -1) || (empty <= last_5tuple_rule)) {
		mvOsPrintf("%s: No free place - sip=0x%x, dip=0x%x, rxq=%d\n", __func__, sip, dip, rxq);
		return 1;
	}

	/* update upper border of 2 tuple rules */
	if (first_2tuple_rule > empty)
		first_2tuple_rule = empty;

	te = pnc_create_2t_entry(sip, dip);
	pmask = pnc_port_mask(eth_port);
	tcam_sw_set_port(te, 0, pmask);
	sram_sw_set_lookup_done(te, 1);
	tcam_sw_text(te, "ipv4_2t");

	if (rxq == -1) {
		sram_sw_set_rinfo(te, RI_DROP, RI_DROP);
		sram_sw_set_lookup_done(te, 1);
	} else {
		sram_sw_set_rinfo(te, 0, RI_DROP);
		sram_sw_set_rinfo(te, RI_L3_FLOW, RI_L3_FLOW);
		sram_sw_set_rxq(te, rxq, 0);
	}

	tcam_hw_write(te, empty);
	tcam_sw_free(te);

	return 0;
#else
	return -1;
#endif /* CONFIG_MV_ETH_PNC_L3_FLOW */
}

/*
 * pnc_ip4_5tuple - Add 5-tuple priority rules
 */
int pnc_ip4_5tuple_rxq(unsigned int eth_port, unsigned int sip, unsigned int dip, unsigned int ports,
						unsigned int proto, int rxq)
{
#ifdef CONFIG_MV_ETH_PNC_L3_FLOW
	struct tcam_entry *te;
	unsigned int pdata, pmask;
	int tid, empty = -1, max_index_occupied = TE_FLOW_L3 - 1;

	if (rxq < -2 || rxq >= CONFIG_MV_ETH_RXQ || eth_port >= CONFIG_MV_ETH_PORTS_NUM)
		return 1;

	for (tid = TE_FLOW_L3; tid < first_2tuple_rule; tid++) {
		te = pnc_tcam_entry_get(tid);
		/* Remember first Empty entry */
		if (te == NULL) {
			if (empty == -1)
				empty = tid;
			continue;
		}
		/* Find existing entry for this rule */
		if (tcam_sw_cmp_5tuple(te, sip, dip, ports, proto) == 0) {
			tcam_sw_get_port(te, &pdata, &pmask);
			if (rxq == -2) { /* delete rule */
				if (!pnc_port_mask_check(pmask, eth_port)) {
					printk(KERN_ERR "%s: rule is not associated with this port (%d)\n", __func__, eth_port);
					tcam_sw_free(te);
					return 1;
				}
				if (last_5tuple_rule == tid)
					last_5tuple_rule = max_index_occupied;
				pnc_te_del(tid);
				tcam_sw_free(te);
				return 0;
			}

			if (!pnc_port_mask_check(pmask, eth_port)) { /* rule is already associated with another port */
				printk(KERN_ERR "%s: rule is already associated with port %d\n",
									__func__, pnc_mask_to_port(pmask));
				return 1;
			}
			if (rxq == -1) { /* set rule to drop mode */
				sram_sw_set_rinfo(te, RI_DROP, RI_DROP);
				sram_sw_set_lookup_done(te, 1);
				tcam_hw_write(te, tid);
			} else { /* update rxq */
				sram_sw_set_rinfo(te, 0, RI_DROP);
				sram_sw_set_rinfo(te, RI_L3_FLOW, RI_L3_FLOW);
				sram_sw_set_rxq(te, rxq, 0);
				tcam_hw_write(te, tid);
			}

			tcam_sw_free(te);
			return 0;
		}
		max_index_occupied = tid;
		tcam_sw_free(te);
	}

	/* Add rule to PNC */
	if (rxq == -2) {
		mvOsPrintf("%s: Entry not found - sip=0x%x, dip=0x%x, ports=0x%x, proto=%d, rxq=%d\n",
				__func__, sip, dip, ports, proto, rxq);
		return 1;
	}
	/* Not found existing entry and no free TCAM entry - Failed */
	if ((empty == -1) || (empty >= first_2tuple_rule)) {
		mvOsPrintf("%s: No free place - sip=0x%x, dip=0x%x, ports=0x%x, proto=%d, rxq=%d\n",
				__func__, sip, dip, ports, proto, rxq);
		return 1;
	}

	/* update lower border of 5 tuple rules */
	if (last_5tuple_rule < empty)
		last_5tuple_rule = empty;

	te = pnc_create_2t_entry(sip, dip);

	tcam_sw_set_byte(te, 9, proto);
	tcam_sw_set_byte(te, 20, (ports >> 0) & 0xFF);
	tcam_sw_set_byte(te, 21, (ports >> 8) & 0xFF);
	tcam_sw_set_byte(te, 22, (ports >> 16) & 0xFF);
	tcam_sw_set_byte(te, 23, (ports >> 24) & 0xFF);
	pmask = pnc_port_mask(eth_port);
	tcam_sw_set_port(te, 0, pmask);
	sram_sw_set_lookup_done(te, 1);
	tcam_sw_text(te, "ipv4_5t");

	if (rxq == -1) {
		sram_sw_set_rinfo(te, RI_DROP, RI_DROP);
		sram_sw_set_lookup_done(te, 1);
	} else {
		sram_sw_set_rinfo(te, 0, RI_DROP);
		sram_sw_set_rinfo(te, RI_L3_FLOW, RI_L3_FLOW);
		sram_sw_set_rxq(te, rxq, 0);
	}

	tcam_hw_write(te, empty);
	tcam_sw_free(te);

	return 0;
#else
	return -1;
#endif /* CONFIG_MV_ETH_PNC_L3_FLOW */
}


/*
 * pnc_rxq_map_dump - Dump all rules
 */
int pnc_rxq_map_dump()
{
#ifdef CONFIG_MV_ETH_PNC_L3_FLOW
	struct tcam_entry *te;
	unsigned int tid, sport, dport, word, shift, rinfo, mask, data;
	unsigned char sip[4], dip[4], sip_buf[16], dip_buf[16], *proto;

	mvOsPrintf(" Tid   Sip               Dip               Sport   Dport   Proto   Rxq    Port   Name\n");
	for (tid = TE_FLOW_L3; tid <= TE_FLOW_L3_END; tid++) {
		te = pnc_tcam_entry_get(tid);
		/* Remember first Empty entry */
		if (te) {
			memset(sip_buf, 0, 16);
			memset(dip_buf, 0, 16);

			sip[0] = *(te->data.u.byte + 12);
			sip[1] = *(te->data.u.byte + 13);
			sip[2] = *(te->data.u.byte + 14);
			sip[3] = *(te->data.u.byte + 15);
			dip[0] = *(te->data.u.byte + 16);
			dip[1] = *(te->data.u.byte + 17);
			dip[2] = *(te->data.u.byte + 18);
			dip[3] = *(te->data.u.byte + 19);
			mvOsSPrintf(sip_buf, "%d.%d.%d.%d", sip[0], sip[1], sip[2], sip[3]);
			mvOsSPrintf(dip_buf, "%d.%d.%d.%d", dip[0], dip[1], dip[2], dip[3]);
			mvOsPrintf(" %-3d   %-15s   %-15s   ", tid, sip_buf, dip_buf);

			if (te->ctrl.text[5] == '5') {
				sport = MV_BYTE_SWAP_16BIT(*((u16 *)(te->data.u.byte + 20)));
				dport = MV_BYTE_SWAP_16BIT(*((u16 *)(te->data.u.byte + 22)));
				proto = (*(te->data.u.byte + 9) == 6) ? "TCP" : "UDP";
				mvOsPrintf("%-5d   %-5d   %-5s   ", sport, dport, proto);
			} else
				mvOsPrintf("-----   -----   -----   ");

			word = RI_VALUE_OFFS / 32;
			shift = RI_VALUE_OFFS % 32;
			rinfo = (te->sram.word[word] >> shift) & ((1 << RI_BITS) - 1);
			if (rinfo & 1)
				mvOsPrintf("DROP   ");
			else
				mvOsPrintf("%-4d   ", sram_sw_get_rxq(te, NULL));

			tcam_sw_get_port(te, &data, &mask);
			mvOsPrintf("%-4d   ", pnc_mask_to_port(mask));
			mvOsPrintf("%s\n", te->ctrl.text);

			tcam_sw_free(te);
		}
	}

	return 0;
#else
	return -1;
#endif /* CONFIG_MV_ETH_PNC_L3_FLOW */
}