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[net-next] net: mvpp2: prs: improve ipv4 parse flow

Message ID 1610289059-14962-1-git-send-email-stefanc@marvell.com (mailing list archive)
State Accepted
Commit c73a45965dd54a10c368191804b9de661eee1007
Delegated to: Netdev Maintainers
Headers show
Series [net-next] net: mvpp2: prs: improve ipv4 parse flow | expand

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netdev/tree_selection success Clearly marked for net-next
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netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/source_inline success Was 0 now: 0
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netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
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netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 122 lines checked
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
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netdev/stable success Stable not CCed

Commit Message

Stefan Chulski Jan. 10, 2021, 2:30 p.m. UTC 
From: Stefan Chulski <stefanc@marvell.com>

Patch didn't fix any issue, just improve parse flow
and align ipv4 parse flow with ipv6 parse flow.

Currently ipv4 kenguru parser first check IP protocol(TCP/UDP)
and then destination IP address.
Patch introduce reverse ipv4 parse, first destination IP address parsed
and only then IP protocol.
This would allow extend capability for packet L4 parsing and align ipv4
parsing flow with ipv6.

Suggested-by: Liron Himi <liron@marvell.com>
Signed-off-by: Stefan Chulski <stefanc@marvell.com>
---
 drivers/net/ethernet/marvell/mvpp2/mvpp2_prs.c | 64 ++++++++++++--------
 1 file changed, 39 insertions(+), 25 deletions(-)

Comments

patchwork-bot+netdevbpf@kernel.org Jan. 12, 2021, 2 a.m. UTC | #1 
Hello:

This patch was applied to netdev/net-next.git (refs/heads/master):

On Sun, 10 Jan 2021 16:30:59 +0200 you wrote:
> From: Stefan Chulski <stefanc@marvell.com>
> 
> Patch didn't fix any issue, just improve parse flow
> and align ipv4 parse flow with ipv6 parse flow.
> 
> Currently ipv4 kenguru parser first check IP protocol(TCP/UDP)
> and then destination IP address.
> Patch introduce reverse ipv4 parse, first destination IP address parsed
> and only then IP protocol.
> This would allow extend capability for packet L4 parsing and align ipv4
> parsing flow with ipv6.
> 
> [...]

Here is the summary with links:
  - [net-next] net: mvpp2: prs: improve ipv4 parse flow
    https://git.kernel.org/netdev/net-next/c/c73a45965dd5

You are awesome, thank you!
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diff mbox series

Patch

diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_prs.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_prs.c
index 5692c60..b9e5b08 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_prs.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_prs.c
@@ -882,15 +882,15 @@  static int mvpp2_prs_ip4_proto(struct mvpp2 *priv, unsigned short proto,
 	mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_IP4);
 	pe.index = tid;
 
-	/* Set next lu to IPv4 */
-	mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_IP4);
-	mvpp2_prs_sram_shift_set(&pe, 12, MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);
+	/* Finished: go to flowid generation */
+	mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_FLOWS);
+	mvpp2_prs_sram_bits_set(&pe, MVPP2_PRS_SRAM_LU_GEN_BIT, 1);
+
 	/* Set L4 offset */
 	mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L4,
 				  sizeof(struct iphdr) - 4,
 				  MVPP2_PRS_SRAM_OP_SEL_UDF_ADD);
-	mvpp2_prs_sram_ai_update(&pe, MVPP2_PRS_IPV4_DIP_AI_BIT,
-				 MVPP2_PRS_IPV4_DIP_AI_BIT);
+	mvpp2_prs_sram_ai_update(&pe, 0, MVPP2_PRS_IPV4_DIP_AI_BIT);
 	mvpp2_prs_sram_ri_update(&pe, ri, ri_mask | MVPP2_PRS_RI_IP_FRAG_MASK);
 
 	mvpp2_prs_tcam_data_byte_set(&pe, 2, 0x00,
@@ -899,7 +899,8 @@  static int mvpp2_prs_ip4_proto(struct mvpp2 *priv, unsigned short proto,
 				     MVPP2_PRS_TCAM_PROTO_MASK);
 
 	mvpp2_prs_tcam_data_byte_set(&pe, 5, proto, MVPP2_PRS_TCAM_PROTO_MASK);
-	mvpp2_prs_tcam_ai_update(&pe, 0, MVPP2_PRS_IPV4_DIP_AI_BIT);
+	mvpp2_prs_tcam_ai_update(&pe, MVPP2_PRS_IPV4_DIP_AI_BIT,
+				 MVPP2_PRS_IPV4_DIP_AI_BIT);
 	/* Unmask all ports */
 	mvpp2_prs_tcam_port_map_set(&pe, MVPP2_PRS_PORT_MASK);
 
@@ -967,12 +968,17 @@  static int mvpp2_prs_ip4_cast(struct mvpp2 *priv, unsigned short l3_cast)
 		return -EINVAL;
 	}
 
-	/* Finished: go to flowid generation */
-	mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_FLOWS);
-	mvpp2_prs_sram_bits_set(&pe, MVPP2_PRS_SRAM_LU_GEN_BIT, 1);
+	/* Go again to ipv4 */
+	mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_IP4);
 
-	mvpp2_prs_tcam_ai_update(&pe, MVPP2_PRS_IPV4_DIP_AI_BIT,
+	mvpp2_prs_sram_ai_update(&pe, MVPP2_PRS_IPV4_DIP_AI_BIT,
 				 MVPP2_PRS_IPV4_DIP_AI_BIT);
+
+	/* Shift back to IPv4 proto */
+	mvpp2_prs_sram_shift_set(&pe, -12, MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);
+
+	mvpp2_prs_tcam_ai_update(&pe, 0, MVPP2_PRS_IPV4_DIP_AI_BIT);
+
 	/* Unmask all ports */
 	mvpp2_prs_tcam_port_map_set(&pe, MVPP2_PRS_PORT_MASK);
 
@@ -1392,8 +1398,9 @@  static int mvpp2_prs_etype_init(struct mvpp2 *priv)
 	mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_IP4);
 	mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_IP4,
 				 MVPP2_PRS_RI_L3_PROTO_MASK);
-	/* Skip eth_type + 4 bytes of IP header */
-	mvpp2_prs_sram_shift_set(&pe, MVPP2_ETH_TYPE_LEN + 4,
+	/* goto ipv4 dest-address (skip eth_type + IP-header-size - 4) */
+	mvpp2_prs_sram_shift_set(&pe, MVPP2_ETH_TYPE_LEN +
+				 sizeof(struct iphdr) - 4,
 				 MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);
 	/* Set L3 offset */
 	mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L3,
@@ -1597,8 +1604,9 @@  static int mvpp2_prs_pppoe_init(struct mvpp2 *priv)
 	mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_IP4);
 	mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_IP4_OPT,
 				 MVPP2_PRS_RI_L3_PROTO_MASK);
-	/* Skip eth_type + 4 bytes of IP header */
-	mvpp2_prs_sram_shift_set(&pe, MVPP2_ETH_TYPE_LEN + 4,
+	/* goto ipv4 dest-address (skip eth_type + IP-header-size - 4) */
+	mvpp2_prs_sram_shift_set(&pe, MVPP2_ETH_TYPE_LEN +
+				 sizeof(struct iphdr) - 4,
 				 MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);
 	/* Set L3 offset */
 	mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L3,
@@ -1727,19 +1735,20 @@  static int mvpp2_prs_ip4_init(struct mvpp2 *priv)
 	mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_IP4);
 	pe.index = MVPP2_PE_IP4_PROTO_UN;
 
-	/* Set next lu to IPv4 */
-	mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_IP4);
-	mvpp2_prs_sram_shift_set(&pe, 12, MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);
+	/* Finished: go to flowid generation */
+	mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_FLOWS);
+	mvpp2_prs_sram_bits_set(&pe, MVPP2_PRS_SRAM_LU_GEN_BIT, 1);
+
 	/* Set L4 offset */
 	mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L4,
 				  sizeof(struct iphdr) - 4,
 				  MVPP2_PRS_SRAM_OP_SEL_UDF_ADD);
-	mvpp2_prs_sram_ai_update(&pe, MVPP2_PRS_IPV4_DIP_AI_BIT,
-				 MVPP2_PRS_IPV4_DIP_AI_BIT);
+	mvpp2_prs_sram_ai_update(&pe, 0, MVPP2_PRS_IPV4_DIP_AI_BIT);
 	mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L4_OTHER,
 				 MVPP2_PRS_RI_L4_PROTO_MASK);
 
-	mvpp2_prs_tcam_ai_update(&pe, 0, MVPP2_PRS_IPV4_DIP_AI_BIT);
+	mvpp2_prs_tcam_ai_update(&pe, MVPP2_PRS_IPV4_DIP_AI_BIT,
+				 MVPP2_PRS_IPV4_DIP_AI_BIT);
 	/* Unmask all ports */
 	mvpp2_prs_tcam_port_map_set(&pe, MVPP2_PRS_PORT_MASK);
 
@@ -1752,14 +1761,19 @@  static int mvpp2_prs_ip4_init(struct mvpp2 *priv)
 	mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_IP4);
 	pe.index = MVPP2_PE_IP4_ADDR_UN;
 
-	/* Finished: go to flowid generation */
-	mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_FLOWS);
-	mvpp2_prs_sram_bits_set(&pe, MVPP2_PRS_SRAM_LU_GEN_BIT, 1);
+	/* Go again to ipv4 */
+	mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_IP4);
+
+	mvpp2_prs_sram_ai_update(&pe, MVPP2_PRS_IPV4_DIP_AI_BIT,
+				 MVPP2_PRS_IPV4_DIP_AI_BIT);
+
+	/* Shift back to IPv4 proto */
+	mvpp2_prs_sram_shift_set(&pe, -12, MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);
+
 	mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_UCAST,
 				 MVPP2_PRS_RI_L3_ADDR_MASK);
+	mvpp2_prs_tcam_ai_update(&pe, 0, MVPP2_PRS_IPV4_DIP_AI_BIT);
 
-	mvpp2_prs_tcam_ai_update(&pe, MVPP2_PRS_IPV4_DIP_AI_BIT,
-				 MVPP2_PRS_IPV4_DIP_AI_BIT);
 	/* Unmask all ports */
 	mvpp2_prs_tcam_port_map_set(&pe, MVPP2_PRS_PORT_MASK);