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[dpdk-dev,v8,01/18] mbuf: redefine packet_type in rte_mbuf

Message ID 1435024235-19483-2-git-send-email-helin.zhang@intel.com (mailing list archive)
State Superseded, archived
Headers show

Commit Message

Helin Zhang June 23, 2015, 1:50 a.m. UTC
In order to unify the packet type, the field of 'packet_type' in
'struct rte_mbuf' needs to be extended from 16 to 32 bits.
Accordingly, some fields in 'struct rte_mbuf' are re-organized to
support this change for Vector PMD. As 'struct rte_kni_mbuf' for
KNI should be right mapped to 'struct rte_mbuf', it should be
modified accordingly. In addition, Vector PMD of ixgbe is disabled
by default, as 'struct rte_mbuf' changed.
To avoid breaking ABI compatibility, all the changes would be
enabled by RTE_NEXT_ABI, which is disabled by default.

Signed-off-by: Helin Zhang <helin.zhang@intel.com>
Signed-off-by: Cunming Liang <cunming.liang@intel.com>
---
 config/common_linuxapp                             |  2 +-
 .../linuxapp/eal/include/exec-env/rte_kni_common.h |  6 +++++
 lib/librte_mbuf/rte_mbuf.h                         | 26 ++++++++++++++++++++++
 3 files changed, 33 insertions(+), 1 deletion(-)

v2 changes:
* Enlarged the packet_type field from 16 bits to 32 bits.
* Redefined the packet type sub-fields.
* Updated the 'struct rte_kni_mbuf' for KNI according to the mbuf changes.

v3 changes:
* Put the mbuf layout changes into a single patch.
* Disabled vector ixgbe PMD by default, as mbuf layout changed.

v5 changes:
* Re-worded the commit logs.

v6 changes:
* Disabled the code changes for unified packet type by default, to
  avoid breaking ABI compatibility.

v7 changes:
* Renamed RTE_UNIFIED_PKT_TYPE to RTE_NEXT_ABI.
* Integrated with changes of QinQ stripping/insertion.

v8 changes:
* Moved the field of 'vlan_tci_outer' in 'struct rte_mbuf' to the end
  of the 1st cache line, to avoid breaking any vectorized PMD storing.

Comments

Thomas Monjalon July 2, 2015, 9:03 a.m. UTC | #1
2015-06-23 09:50, Helin Zhang:
> In order to unify the packet type, the field of 'packet_type' in
> 'struct rte_mbuf' needs to be extended from 16 to 32 bits.
> Accordingly, some fields in 'struct rte_mbuf' are re-organized to
> support this change for Vector PMD. As 'struct rte_kni_mbuf' for
> KNI should be right mapped to 'struct rte_mbuf', it should be
> modified accordingly. In addition, Vector PMD of ixgbe is disabled
> by default, as 'struct rte_mbuf' changed.
[...]
> -CONFIG_RTE_IXGBE_INC_VECTOR=y
> +CONFIG_RTE_IXGBE_INC_VECTOR=n

It is the default configuration. Disabling it do not prevent from
build break during a "git bisect".
Please merge the changes for vector ixgbe in this patch.
Helin Zhang July 3, 2015, 1:11 a.m. UTC | #2
Hi Thomas

> -----Original Message-----
> From: Thomas Monjalon [mailto:thomas.monjalon@6wind.com]
> Sent: Thursday, July 2, 2015 5:03 PM
> To: Zhang, Helin
> Cc: dev@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH v8 01/18] mbuf: redefine packet_type in
> rte_mbuf
> 
> 2015-06-23 09:50, Helin Zhang:
> > In order to unify the packet type, the field of 'packet_type' in
> > 'struct rte_mbuf' needs to be extended from 16 to 32 bits.
> > Accordingly, some fields in 'struct rte_mbuf' are re-organized to
> > support this change for Vector PMD. As 'struct rte_kni_mbuf' for KNI
> > should be right mapped to 'struct rte_mbuf', it should be modified
> > accordingly. In addition, Vector PMD of ixgbe is disabled by default,
> > as 'struct rte_mbuf' changed.
> [...]
> > -CONFIG_RTE_IXGBE_INC_VECTOR=y
> > +CONFIG_RTE_IXGBE_INC_VECTOR=n
> 
> It is the default configuration. Disabling it do not prevent from build break during
> a "git bisect".
> Please merge the changes for vector ixgbe in this patch.

Sure, no problem!
V9 will be sent soon. Thanks!

- Helin
diff mbox

Patch

diff --git a/config/common_linuxapp b/config/common_linuxapp
index 5deb55a..617d4a1 100644
--- a/config/common_linuxapp
+++ b/config/common_linuxapp
@@ -167,7 +167,7 @@  CONFIG_RTE_LIBRTE_IXGBE_DEBUG_TX_FREE=n
 CONFIG_RTE_LIBRTE_IXGBE_DEBUG_DRIVER=n
 CONFIG_RTE_LIBRTE_IXGBE_PF_DISABLE_STRIP_CRC=n
 CONFIG_RTE_LIBRTE_IXGBE_RX_ALLOW_BULK_ALLOC=y
-CONFIG_RTE_IXGBE_INC_VECTOR=y
+CONFIG_RTE_IXGBE_INC_VECTOR=n
 CONFIG_RTE_IXGBE_RX_OLFLAGS_ENABLE=y
 
 #
diff --git a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
index 1e55c2d..e9f38bd 100644
--- a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
+++ b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
@@ -117,9 +117,15 @@  struct rte_kni_mbuf {
 	uint16_t data_off;      /**< Start address of data in segment buffer. */
 	char pad1[4];
 	uint64_t ol_flags;      /**< Offload features. */
+#ifdef RTE_NEXT_ABI
+	char pad2[4];
+	uint32_t pkt_len;       /**< Total pkt len: sum of all segment data_len. */
+	uint16_t data_len;      /**< Amount of data in segment buffer. */
+#else
 	char pad2[2];
 	uint16_t data_len;      /**< Amount of data in segment buffer. */
 	uint32_t pkt_len;       /**< Total pkt len: sum of all segment data_len. */
+#endif
 
 	/* fields on second cache line */
 	char pad3[8] __attribute__((__aligned__(RTE_CACHE_LINE_SIZE)));
diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index a0f3d3b..0315561 100644
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -275,6 +275,28 @@  struct rte_mbuf {
 	/* remaining bytes are set on RX when pulling packet from descriptor */
 	MARKER rx_descriptor_fields1;
 
+#ifdef RTE_NEXT_ABI
+	/*
+	 * The packet type, which is the combination of outer/inner L2, L3, L4
+	 * and tunnel types.
+	 */
+	union {
+		uint32_t packet_type; /**< L2/L3/L4 and tunnel information. */
+		struct {
+			uint32_t l2_type:4; /**< (Outer) L2 type. */
+			uint32_t l3_type:4; /**< (Outer) L3 type. */
+			uint32_t l4_type:4; /**< (Outer) L4 type. */
+			uint32_t tun_type:4; /**< Tunnel type. */
+			uint32_t inner_l2_type:4; /**< Inner L2 type. */
+			uint32_t inner_l3_type:4; /**< Inner L3 type. */
+			uint32_t inner_l4_type:4; /**< Inner L4 type. */
+		};
+	};
+
+	uint32_t pkt_len;         /**< Total pkt len: sum of all segments. */
+	uint16_t data_len;        /**< Amount of data in segment buffer. */
+	uint16_t vlan_tci;        /**< VLAN Tag Control Identifier (CPU order) */
+#else /* RTE_NEXT_ABI */
 	/**
 	 * The packet type, which is used to indicate ordinary packet and also
 	 * tunneled packet format, i.e. each number is represented a type of
@@ -286,6 +308,7 @@  struct rte_mbuf {
 	uint32_t pkt_len;         /**< Total pkt len: sum of all segments. */
 	uint16_t vlan_tci;        /**< VLAN Tag Control Identifier (CPU order) */
 	uint16_t vlan_tci_outer;  /**< Outer VLAN Tag Control Identifier (CPU order) */
+#endif /* RTE_NEXT_ABI */
 	union {
 		uint32_t rss;     /**< RSS hash result if RSS enabled */
 		struct {
@@ -306,6 +329,9 @@  struct rte_mbuf {
 	} hash;                   /**< hash information */
 
 	uint32_t seqn; /**< Sequence number. See also rte_reorder_insert() */
+#ifdef RTE_NEXT_ABI
+	uint16_t vlan_tci_outer;  /**< Outer VLAN Tag Control Identifier (CPU order) */
+#endif /* RTE_NEXT_ABI */
 
 	/* second cache line - fields only used in slow path or on TX */
 	MARKER cacheline1 __rte_cache_aligned;