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Subject: [dpdk-dev] [PATCH v3 37/40] net/dpaa: add support for checksum
offload
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Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>
Signed-off-by: Shreyansh Jain <shreyansh.jain@nxp.com>
---
doc/guides/nics/features/dpaa.ini | 2 +
drivers/net/dpaa/dpaa_ethdev.c | 4 ++
drivers/net/dpaa/dpaa_rxtx.c | 89 +++++++++++++++++++++++++++++++++++++++
drivers/net/dpaa/dpaa_rxtx.h | 19 +++++++++
4 files changed, 114 insertions(+)
diff --git a/doc/guides/nics/features/dpaa.ini b/doc/guides/nics/features/dpaa.ini
index 2ef1b56..23626c0 100644
--- a/doc/guides/nics/features/dpaa.ini
+++ b/doc/guides/nics/features/dpaa.ini
@@ -13,6 +13,8 @@ Allmulticast mode = Y
Unicast MAC filter = Y
RSS hash = Y
Flow control = Y
+L3 checksum offload = Y
+L4 checksum offload = Y
Packet type parsing = Y
Basic stats = Y
ARMv8 = Y
diff --git a/drivers/net/dpaa/dpaa_ethdev.c b/drivers/net/dpaa/dpaa_ethdev.c
index bcb69ad..96924b6 100644
--- a/drivers/net/dpaa/dpaa_ethdev.c
+++ b/drivers/net/dpaa/dpaa_ethdev.c
@@ -186,6 +186,10 @@ static void dpaa_eth_dev_info(struct rte_eth_dev *dev,
(DEV_RX_OFFLOAD_IPV4_CKSUM |
DEV_RX_OFFLOAD_UDP_CKSUM |
DEV_RX_OFFLOAD_TCP_CKSUM);
+ dev_info->tx_offload_capa =
+ (DEV_TX_OFFLOAD_IPV4_CKSUM |
+ DEV_TX_OFFLOAD_UDP_CKSUM |
+ DEV_TX_OFFLOAD_TCP_CKSUM);
}
static int dpaa_eth_link_update(struct rte_eth_dev *dev,
diff --git a/drivers/net/dpaa/dpaa_rxtx.c b/drivers/net/dpaa/dpaa_rxtx.c
index 90be40d..0f43bb4 100644
--- a/drivers/net/dpaa/dpaa_rxtx.c
+++ b/drivers/net/dpaa/dpaa_rxtx.c
@@ -200,6 +200,82 @@ static inline void dpaa_eth_packet_info(struct rte_mbuf *m,
/* Packet received without stripping the vlan */
}
+static inline void dpaa_checksum(struct rte_mbuf *mbuf)
+{
+ struct ether_hdr *eth_hdr = rte_pktmbuf_mtod(mbuf, struct ether_hdr *);
+ char *l3_hdr = (char *)eth_hdr + mbuf->l2_len;
+ struct ipv4_hdr *ipv4_hdr = (struct ipv4_hdr *)l3_hdr;
+ struct ipv6_hdr *ipv6_hdr = (struct ipv6_hdr *)l3_hdr;
+
+ DPAA_TX_LOG(DEBUG, "Calculating checksum for mbuf: %p", mbuf);
+
+ if (((mbuf->packet_type & RTE_PTYPE_L3_MASK) == RTE_PTYPE_L3_IPV4) ||
+ ((mbuf->packet_type & RTE_PTYPE_L3_MASK) ==
+ RTE_PTYPE_L3_IPV4_EXT)) {
+ ipv4_hdr = (struct ipv4_hdr *)l3_hdr;
+ ipv4_hdr->hdr_checksum = 0;
+ ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr);
+ } else if (((mbuf->packet_type & RTE_PTYPE_L3_MASK) ==
+ RTE_PTYPE_L3_IPV6) ||
+ ((mbuf->packet_type & RTE_PTYPE_L3_MASK) ==
+ RTE_PTYPE_L3_IPV6_EXT))
+ ipv6_hdr = (struct ipv6_hdr *)l3_hdr;
+
+ if ((mbuf->packet_type & RTE_PTYPE_L4_MASK) == RTE_PTYPE_L4_TCP) {
+ struct tcp_hdr *tcp_hdr = (struct tcp_hdr *)(l3_hdr +
+ mbuf->l3_len);
+ tcp_hdr->cksum = 0;
+ if (eth_hdr->ether_type == htons(ETHER_TYPE_IPv4))
+ tcp_hdr->cksum = rte_ipv4_udptcp_cksum(ipv4_hdr,
+ tcp_hdr);
+ else /* assume ethertype == ETHER_TYPE_IPv6 */
+ tcp_hdr->cksum = rte_ipv6_udptcp_cksum(ipv6_hdr,
+ tcp_hdr);
+ } else if ((mbuf->packet_type & RTE_PTYPE_L4_MASK) ==
+ RTE_PTYPE_L4_UDP) {
+ struct udp_hdr *udp_hdr = (struct udp_hdr *)(l3_hdr +
+ mbuf->l3_len);
+ udp_hdr->dgram_cksum = 0;
+ if (eth_hdr->ether_type == htons(ETHER_TYPE_IPv4))
+ udp_hdr->dgram_cksum = rte_ipv4_udptcp_cksum(ipv4_hdr,
+ udp_hdr);
+ else /* assume ethertype == ETHER_TYPE_IPv6 */
+ udp_hdr->dgram_cksum = rte_ipv6_udptcp_cksum(ipv6_hdr,
+ udp_hdr);
+ }
+}
+
+static inline void dpaa_checksum_offload(struct rte_mbuf *mbuf,
+ struct qm_fd *fd, char *prs_buf)
+{
+ struct dpaa_eth_parse_results_t *prs;
+
+ DPAA_TX_LOG(DEBUG, " Offloading checksum for mbuf: %p", mbuf);
+
+ prs = GET_TX_PRS(prs_buf);
+ prs->l3r = 0;
+ prs->l4r = 0;
+ if (((mbuf->packet_type & RTE_PTYPE_L3_MASK) == RTE_PTYPE_L3_IPV4) ||
+ ((mbuf->packet_type & RTE_PTYPE_L3_MASK) ==
+ RTE_PTYPE_L3_IPV4_EXT))
+ prs->l3r = DPAA_L3_PARSE_RESULT_IPV4;
+ else if (((mbuf->packet_type & RTE_PTYPE_L3_MASK) ==
+ RTE_PTYPE_L3_IPV6) ||
+ ((mbuf->packet_type & RTE_PTYPE_L3_MASK) ==
+ RTE_PTYPE_L3_IPV6_EXT))
+ prs->l3r = DPAA_L3_PARSE_RESULT_IPV6;
+
+ if ((mbuf->packet_type & RTE_PTYPE_L4_MASK) == RTE_PTYPE_L4_TCP)
+ prs->l4r = DPAA_L4_PARSE_RESULT_TCP;
+ else if ((mbuf->packet_type & RTE_PTYPE_L4_MASK) == RTE_PTYPE_L4_UDP)
+ prs->l4r = DPAA_L4_PARSE_RESULT_UDP;
+
+ prs->ip_off[0] = mbuf->l2_len;
+ prs->l4_off = mbuf->l3_len + mbuf->l2_len;
+ /* Enable L3 (and L4, if TCP or UDP) HW checksum*/
+ fd->cmd = DPAA_FD_CMD_RPD | DPAA_FD_CMD_DTC;
+}
+
static inline struct rte_mbuf *dpaa_eth_fd_to_mbuf(struct qm_fd *fd,
uint32_t ifid)
{
@@ -358,6 +434,19 @@ tx_on_dpaa_pool_unsegmented(struct rte_mbuf *mbuf,
}
rte_pktmbuf_free(mbuf);
}
+
+ if (mbuf->ol_flags & DPAA_TX_CKSUM_OFFLOAD_MASK) {
+ if (mbuf->data_off < (DEFAULT_TX_ICEOF +
+ sizeof(struct dpaa_eth_parse_results_t))) {
+ DPAA_TX_LOG(DEBUG, "Checksum offload Err: "
+ "Not enough Headroom "
+ "space for correct Checksum offload."
+ "So Calculating checksum in Software.");
+ dpaa_checksum(mbuf);
+ } else {
+ dpaa_checksum_offload(mbuf, fd_arr, mbuf->buf_addr);
+ }
+ }
}
/* Handle all mbufs on dpaa BMAN managed pool */
diff --git a/drivers/net/dpaa/dpaa_rxtx.h b/drivers/net/dpaa/dpaa_rxtx.h
index 68d2c41..624ddda 100644
--- a/drivers/net/dpaa/dpaa_rxtx.h
+++ b/drivers/net/dpaa/dpaa_rxtx.h
@@ -41,6 +41,22 @@
/* IC offsets from buffer header address */
#define DEFAULT_RX_ICEOF 16
+#define DEFAULT_TX_ICEOF 16
+
+/*
+ * Values for the L3R field of the FM Parse Results
+ */
+/* L3 Type field: First IP Present IPv4 */
+#define DPAA_L3_PARSE_RESULT_IPV4 0x80
+/* L3 Type field: First IP Present IPv6 */
+#define DPAA_L3_PARSE_RESULT_IPV6 0x40
+/* Values for the L4R field of the FM Parse Results
+ * See $8.8.4.7.20 - L4 HXS - L4 Results from DPAA-Rev2 Reference Manual.
+ */
+/* L4 Type field: UDP */
+#define DPAA_L4_PARSE_RESULT_UDP 0x40
+/* L4 Type field: TCP */
+#define DPAA_L4_PARSE_RESULT_TCP 0x20
#define DPAA_MAX_DEQUEUE_NUM_FRAMES 63
/** <Maximum number of frames to be dequeued in a single rx call*/
@@ -257,6 +273,9 @@ struct annotations_t {
#define GET_RX_PRS(_buf) \
(struct dpaa_eth_parse_results_t *)((uint8_t *)_buf + DEFAULT_RX_ICEOF)
+#define GET_TX_PRS(_buf) \
+ (struct dpaa_eth_parse_results_t *)((uint8_t *)_buf + DEFAULT_TX_ICEOF)
+
uint16_t dpaa_eth_queue_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs);
uint16_t dpaa_eth_queue_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs);
--
2.9.3