Commit 1c60c7f9 authored by Florian Fainelli's avatar Florian Fainelli Committed by David S. Miller
Browse files

net: dsa: bcm_sf2: Get rid of unmarshalling functions 



Now that we have migrated the CFP rule handling to a list with a
software copy, the delete/get operation just returns what is on the
list, no need to read from the hardware which is both slow and more
error prone.

Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1c0130f0

drivers/net/dsa/bcm_sf2_cfp.c

+0 −310
Original line number Diff line number Diff line
@@ -974,316 +974,6 @@ static void bcm_sf2_invert_masks(struct ethtool_rx_flow_spec *flow) 
	flow->m_ext.data[1] ^= cpu_to_be32(~0);

}



static int __maybe_unused bcm_sf2_cfp_unslice_ipv4(struct bcm_sf2_priv *priv,

						   struct ethtool_tcpip4_spec *v4_spec,

						   bool mask)

{

	u32 reg, offset, ipv4;

	u16 src_dst_port;



	if (mask)

		offset = CORE_CFP_MASK_PORT(3);

	else

		offset = CORE_CFP_DATA_PORT(3);



	reg = core_readl(priv, offset);

	/* src port [15:8] */

	src_dst_port = reg << 8;



	if (mask)

		offset = CORE_CFP_MASK_PORT(2);

	else

		offset = CORE_CFP_DATA_PORT(2);



	reg = core_readl(priv, offset);

	/* src port [7:0] */

	src_dst_port |= (reg >> 24);



	v4_spec->pdst = cpu_to_be16(src_dst_port);

	v4_spec->psrc = cpu_to_be16((u16)(reg >> 8));



	/* IPv4 dst [15:8] */

	ipv4 = (reg & 0xff) << 8;



	if (mask)

		offset = CORE_CFP_MASK_PORT(1);

	else

		offset = CORE_CFP_DATA_PORT(1);



	reg = core_readl(priv, offset);

	/* IPv4 dst [31:16] */

	ipv4 |= ((reg >> 8) & 0xffff) << 16;

	/* IPv4 dst [7:0] */

	ipv4 |= (reg >> 24) & 0xff;

	v4_spec->ip4dst = cpu_to_be32(ipv4);



	/* IPv4 src [15:8] */

	ipv4 = (reg & 0xff) << 8;



	if (mask)

		offset = CORE_CFP_MASK_PORT(0);

	else

		offset = CORE_CFP_DATA_PORT(0);

	reg = core_readl(priv, offset);



	/* Once the TCAM is programmed, the mask reflects the slice number

	 * being matched, don't bother checking it when reading back the

	 * mask spec

	 */

	if (!mask && !(reg & SLICE_VALID))

		return -EINVAL;



	/* IPv4 src [7:0] */

	ipv4 |= (reg >> 24) & 0xff;

	/* IPv4 src [31:16] */

	ipv4 |= ((reg >> 8) & 0xffff) << 16;

	v4_spec->ip4src = cpu_to_be32(ipv4);



	return 0;

}



static int bcm_sf2_cfp_ipv4_rule_get(struct bcm_sf2_priv *priv, int port,

				     struct ethtool_rx_flow_spec *fs)

{

	struct ethtool_tcpip4_spec *v4_spec = NULL, *v4_m_spec = NULL;

	u32 reg;

	int ret;



	reg = core_readl(priv, CORE_CFP_DATA_PORT(6));



	switch ((reg & IPPROTO_MASK) >> IPPROTO_SHIFT) {

	case IPPROTO_TCP:

		fs->flow_type = TCP_V4_FLOW;

		v4_spec = &fs->h_u.tcp_ip4_spec;

		v4_m_spec = &fs->m_u.tcp_ip4_spec;

		break;

	case IPPROTO_UDP:

		fs->flow_type = UDP_V4_FLOW;

		v4_spec = &fs->h_u.udp_ip4_spec;

		v4_m_spec = &fs->m_u.udp_ip4_spec;

		break;

	default:

		return -EINVAL;

	}



	fs->m_ext.data[0] = cpu_to_be32((reg >> IP_FRAG_SHIFT) & 1);

	v4_spec->tos = (reg >> IPTOS_SHIFT) & IPTOS_MASK;



	ret = bcm_sf2_cfp_unslice_ipv4(priv, v4_spec, false);

	if (ret)

		return ret;



	return bcm_sf2_cfp_unslice_ipv4(priv, v4_m_spec, true);

}



static int __maybe_unused bcm_sf2_cfp_unslice_ipv6(struct bcm_sf2_priv *priv,

						   __be32 *ip6_addr,

						   __be16 *port,

						   bool mask)

{

	u32 reg, tmp, offset;



	/* C-Tag		[31:24]

	 * UDF_n_B8		[23:8] (port)

	 * UDF_n_B7 (upper)	[7:0] (addr[15:8])

	 */

	if (mask)

		offset = CORE_CFP_MASK_PORT(4);

	else

		offset = CORE_CFP_DATA_PORT(4);

	reg = core_readl(priv, offset);

	*port = cpu_to_be32(reg) >> 8;

	tmp = (u32)(reg & 0xff) << 8;



	/* UDF_n_B7 (lower)	[31:24] (addr[7:0])

	 * UDF_n_B6		[23:8] (addr[31:16])

	 * UDF_n_B5 (upper)	[7:0] (addr[47:40])

	 */

	if (mask)

		offset = CORE_CFP_MASK_PORT(3);

	else

		offset = CORE_CFP_DATA_PORT(3);

	reg = core_readl(priv, offset);

	tmp |= (reg >> 24) & 0xff;

	tmp |= (u32)((reg >> 8) << 16);

	ip6_addr[3] = cpu_to_be32(tmp);

	tmp = (u32)(reg & 0xff) << 8;



	/* UDF_n_B5 (lower)	[31:24] (addr[39:32])

	 * UDF_n_B4		[23:8] (addr[63:48])

	 * UDF_n_B3 (upper)	[7:0] (addr[79:72])

	 */

	if (mask)

		offset = CORE_CFP_MASK_PORT(2);

	else

		offset = CORE_CFP_DATA_PORT(2);

	reg = core_readl(priv, offset);

	tmp |= (reg >> 24) & 0xff;

	tmp |= (u32)((reg >> 8) << 16);

	ip6_addr[2] = cpu_to_be32(tmp);

	tmp = (u32)(reg & 0xff) << 8;



	/* UDF_n_B3 (lower)	[31:24] (addr[71:64])

	 * UDF_n_B2		[23:8] (addr[95:80])

	 * UDF_n_B1 (upper)	[7:0] (addr[111:104])

	 */

	if (mask)

		offset = CORE_CFP_MASK_PORT(1);

	else

		offset = CORE_CFP_DATA_PORT(1);

	reg = core_readl(priv, offset);

	tmp |= (reg >> 24) & 0xff;

	tmp |= (u32)((reg >> 8) << 16);

	ip6_addr[1] = cpu_to_be32(tmp);

	tmp = (u32)(reg & 0xff) << 8;



	/* UDF_n_B1 (lower)	[31:24] (addr[103:96])

	 * UDF_n_B0		[23:8] (addr[127:112])

	 * Reserved		[7:4]

	 * Slice ID		[3:2]

	 * Slice valid		[1:0]

	 */

	if (mask)

		offset = CORE_CFP_MASK_PORT(0);

	else

		offset = CORE_CFP_DATA_PORT(0);

	reg = core_readl(priv, offset);

	tmp |= (reg >> 24) & 0xff;

	tmp |= (u32)((reg >> 8) << 16);

	ip6_addr[0] = cpu_to_be32(tmp);



	if (!mask && !(reg & SLICE_VALID))

		return -EINVAL;



	return 0;

}



static int __maybe_unused bcm_sf2_cfp_ipv6_rule_get(struct bcm_sf2_priv *priv,

						    int port,

						    struct ethtool_rx_flow_spec *fs,

						    u32 next_loc)

{

	struct ethtool_tcpip6_spec *v6_spec = NULL, *v6_m_spec = NULL;

	u32 reg;

	int ret;



	/* UDPv6 and TCPv6 both use ethtool_tcpip6_spec so we are fine

	 * assuming tcp_ip6_spec here being an union.

	 */

	v6_spec = &fs->h_u.tcp_ip6_spec;

	v6_m_spec = &fs->m_u.tcp_ip6_spec;



	/* Read the second half first */

	ret = bcm_sf2_cfp_unslice_ipv6(priv, v6_spec->ip6dst, &v6_spec->pdst,

				       false);

	if (ret)

		return ret;



	ret = bcm_sf2_cfp_unslice_ipv6(priv, v6_m_spec->ip6dst,

				       &v6_m_spec->pdst, true);

	if (ret)

		return ret;



	/* Read last to avoid next entry clobbering the results during search

	 * operations. We would not have the port enabled for this rule, so

	 * don't bother checking it.

	 */

	(void)core_readl(priv, CORE_CFP_DATA_PORT(7));



	/* The slice number is valid, so read the rule we are chained from now

	 * which is our first half.

	 */

	bcm_sf2_cfp_rule_addr_set(priv, next_loc);

	ret = bcm_sf2_cfp_op(priv, OP_SEL_READ | TCAM_SEL);

	if (ret)

		return ret;



	reg = core_readl(priv, CORE_CFP_DATA_PORT(6));



	switch ((reg & IPPROTO_MASK) >> IPPROTO_SHIFT) {

	case IPPROTO_TCP:

		fs->flow_type = TCP_V6_FLOW;

		break;

	case IPPROTO_UDP:

		fs->flow_type = UDP_V6_FLOW;

		break;

	default:

		return -EINVAL;

	}



	ret = bcm_sf2_cfp_unslice_ipv6(priv, v6_spec->ip6src, &v6_spec->psrc,

				       false);

	if (ret)

		return ret;



	return bcm_sf2_cfp_unslice_ipv6(priv, v6_m_spec->ip6src,

					&v6_m_spec->psrc, true);

}



static int __maybe_unused bcm_sf2_cfp_rule_get_hw(struct bcm_sf2_priv *priv,

						  int port,

						  struct ethtool_rxnfc *nfc)

{

	u32 reg, ipv4_or_chain_id;

	unsigned int queue_num;

	int ret;



	bcm_sf2_cfp_rule_addr_set(priv, nfc->fs.location);



	ret = bcm_sf2_cfp_op(priv, OP_SEL_READ | ACT_POL_RAM);

	if (ret)

		return ret;



	reg = core_readl(priv, CORE_ACT_POL_DATA0);



	ret = bcm_sf2_cfp_op(priv, OP_SEL_READ | TCAM_SEL);

	if (ret)

		return ret;



	/* Extract the destination port */

	nfc->fs.ring_cookie = fls((reg >> DST_MAP_IB_SHIFT) &

				  DST_MAP_IB_MASK) - 1;



	/* There is no Port 6, so we compensate for that here */

	if (nfc->fs.ring_cookie >= 6)

		nfc->fs.ring_cookie++;

	nfc->fs.ring_cookie *= SF2_NUM_EGRESS_QUEUES;



	/* Extract the destination queue */

	queue_num = (reg >> NEW_TC_SHIFT) & NEW_TC_MASK;

	nfc->fs.ring_cookie += queue_num;



	/* Extract the L3_FRAMING or CHAIN_ID */

	reg = core_readl(priv, CORE_CFP_DATA_PORT(6));



	/* With IPv6 rules this would contain a non-zero chain ID since

	 * we reserve entry 0 and it cannot be used. So if we read 0 here

	 * this means an IPv4 rule.

	 */

	ipv4_or_chain_id = (reg >> L3_FRAMING_SHIFT) & 0xff;

	if (ipv4_or_chain_id == 0)

		ret = bcm_sf2_cfp_ipv4_rule_get(priv, port, &nfc->fs);

	else

		ret = bcm_sf2_cfp_ipv6_rule_get(priv, port, &nfc->fs,

						ipv4_or_chain_id);

	if (ret)

		return ret;



	/* Read last to avoid next entry clobbering the results during search

	 * operations

	 */

	reg = core_readl(priv, CORE_CFP_DATA_PORT(7));

	if (!(reg & 1 << port))

		return -EINVAL;



	bcm_sf2_invert_masks(&nfc->fs);



	/* Put the TCAM size here */

	nfc->data = bcm_sf2_cfp_rule_size(priv);



	return 0;

}



static int bcm_sf2_cfp_rule_get(struct bcm_sf2_priv *priv, int port,

				struct ethtool_rxnfc *nfc)

{

CRA Git | Maintained and supported by SUSTech CRA and CCSE