[dpdk-stable] patch 'net/enic: update the UDP RSS detection mechanism' has been queued to stable release 18.05.1

[Christian Ehrhardt <christian.ehrhardt@canonical.com>]

Hi,

FYI, your patch has been queued to stable release 18.05.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 08/01/18. So please
shout if anyone has objections.

Thanks.

Christian Ehrhardt <christian.ehrhardt@canonical.com>

---
>From 094fcec30e786b952a0c294ca9ce929a2315de7a Mon Sep 17 00:00:00 2001
From: Hyong Youb Kim <hyonkim@cisco.com>
Date: Fri, 29 Jun 2018 02:29:31 -0700
Subject: [PATCH] net/enic: update the UDP RSS detection mechanism

[ upstream commit 5bc989e6db9df8acbf8129a4ea4a78d8614944f7 ]

The UDP RSS interface has changed in the release firmware for 100G VIC
adapters. The capability bit is now in NIC_CFG. Also the driver is
supposed to use CMD_NIC_CFG_CHK and check if RSS config is
successful. No more changes are expected with respect to UDP RSS API.

Fixes: 94c351895888 ("net/enic: update UDP RSS controls")

Signed-off-by: Hyong Youb Kim <hyonkim@cisco.com>
Reviewed-by: John Daley <johndale@cisco.com>
---
 drivers/net/enic/base/vnic_dev.c    | 16 ++++++++++++++++
 drivers/net/enic/base/vnic_dev.h    |  4 ++++
 drivers/net/enic/base/vnic_devcmd.h | 23 ++++++++++++++++++++++-
 drivers/net/enic/base/vnic_enet.h   |  5 ++---
 drivers/net/enic/base/vnic_nic.h    |  4 ++--
 drivers/net/enic/enic.h             |  2 ++
 drivers/net/enic/enic_main.c        |  9 ++++++---
 drivers/net/enic/enic_res.c         | 11 +++++++----
 8 files changed, 61 insertions(+), 13 deletions(-)

diff --git a/drivers/net/enic/base/vnic_dev.c b/drivers/net/enic/base/vnic_dev.c
index 8483f76f3..16e8814a6 100644
--- a/drivers/net/enic/base/vnic_dev.c
+++ b/drivers/net/enic/base/vnic_dev.c
@@ -528,6 +528,22 @@ parse_max_level:
 	return 0;
 }
 
+void vnic_dev_capable_udp_rss_weak(struct vnic_dev *vdev, bool *cfg_chk,
+				   bool *weak)
+{
+	u64 a0 = CMD_NIC_CFG, a1 = 0;
+	int wait = 1000;
+	int err;
+
+	*cfg_chk = false;
+	*weak = false;
+	err = vnic_dev_cmd(vdev, CMD_CAPABILITY, &a0, &a1, wait);
+	if (err == 0 && a0 != 0 && a1 != 0) {
+		*cfg_chk = true;
+		*weak = !!((a1 >> 32) & CMD_NIC_CFG_CAPF_UDP_WEAK);
+	}
+}
+
 int vnic_dev_capable(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd)
 {
 	u64 a0 = (u32)cmd, a1 = 0;
diff --git a/drivers/net/enic/base/vnic_dev.h b/drivers/net/enic/base/vnic_dev.h
index 3c9084304..270a47bd2 100644
--- a/drivers/net/enic/base/vnic_dev.h
+++ b/drivers/net/enic/base/vnic_dev.h
@@ -6,6 +6,8 @@
 #ifndef _VNIC_DEV_H_
 #define _VNIC_DEV_H_
 
+#include <stdbool.h>
+
 #include <rte_pci.h>
 #include <rte_bus_pci.h>
 
@@ -109,6 +111,8 @@ int vnic_dev_capable_adv_filters(struct vnic_dev *vdev);
 int vnic_dev_capable(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd);
 int vnic_dev_capable_filter_mode(struct vnic_dev *vdev, u32 *mode,
 				 u8 *filter_actions);
+void vnic_dev_capable_udp_rss_weak(struct vnic_dev *vdev, bool *cfg_chk,
+				   bool *weak);
 int vnic_dev_asic_info(struct vnic_dev *vdev, u16 *asic_type, u16 *asic_rev);
 int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, size_t size,
 	void *value);
diff --git a/drivers/net/enic/base/vnic_devcmd.h b/drivers/net/enic/base/vnic_devcmd.h
index 2865eb4d4..a22d8a76c 100644
--- a/drivers/net/enic/base/vnic_devcmd.h
+++ b/drivers/net/enic/base/vnic_devcmd.h
@@ -138,9 +138,27 @@ enum vnic_devcmd_cmd {
 	/* del VLAN id in (u16)a0 */
 	CMD_VLAN_DEL            = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 15),
 
-	/* nic_cfg in (u32)a0 */
+	/*
+	 * nic_cfg in (u32)a0
+	 *
+	 * Capability query:
+	 * out: (u64) a0= 1 if a1 is valid
+	 *      (u64) a1= (NIC_CFG bits supported) | (flags << 32)
+	 *                              (flags are CMD_NIC_CFG_CAPF_xxx)
+	 */
 	CMD_NIC_CFG             = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 16),
 
+	/*
+	 * nic_cfg_chk  (same as nic_cfg, but may return error)
+	 * in (u32)a0
+	 *
+	 * Capability query:
+	 * out: (u64) a0= 1 if a1 is valid
+	 *      (u64) a1= (NIC_CFG bits supported) | (flags << 32)
+	 *                              (flags are CMD_NIC_CFG_CAPF_xxx)
+	 */
+	CMD_NIC_CFG_CHK         = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 16),
+
 	/* union vnic_rss_key in mem: (u64)a0=paddr, (u16)a1=len */
 	CMD_RSS_KEY             = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 17),
 
@@ -605,6 +623,9 @@ enum filter_cap_mode {
 /* flags for CMD_INIT */
 #define CMD_INITF_DEFAULT_MAC	0x1	/* init with default mac addr */
 
+/* flags for CMD_NIC_CFG */
+#define CMD_NIC_CFG_CAPF_UDP_WEAK	(1ULL << 0) /* Bodega-style UDP RSS */
+
 /* flags for CMD_PACKET_FILTER */
 #define CMD_PFILTER_DIRECTED		0x01
 #define CMD_PFILTER_MULTICAST		0x02
diff --git a/drivers/net/enic/base/vnic_enet.h b/drivers/net/enic/base/vnic_enet.h
index 49504a7da..901f3b46e 100644
--- a/drivers/net/enic/base/vnic_enet.h
+++ b/drivers/net/enic/base/vnic_enet.h
@@ -53,9 +53,8 @@ struct vnic_enet_config {
 #define VENETF_NVGRE    0x20000 /* NVGRE offload */
 #define VENETF_GRPINTR  0x40000 /* group interrupt */
 #define VENETF_NICSWITCH        0x80000 /* NICSWITCH enabled */
-#define VENETF_RSSHASH_UDP_WEAK 0x100000 /* VIC has Bodega-style UDP RSS */
-#define VENETF_RSSHASH_UDPIPV4  0x200000 /* Hash on UDP + IPv4 fields */
-#define VENETF_RSSHASH_UDPIPV6  0x400000 /* Hash on UDP + IPv6 fields */
+#define VENETF_RSSHASH_UDPIPV4  0x100000 /* Hash on UDP + IPv4 fields */
+#define VENETF_RSSHASH_UDPIPV6  0x200000 /* Hash on UDP + IPv6 fields */
 
 #define VENET_INTR_TYPE_MIN	0	/* Timer specs min interrupt spacing */
 #define VENET_INTR_TYPE_IDLE	1	/* Timer specs idle time before irq */
diff --git a/drivers/net/enic/base/vnic_nic.h b/drivers/net/enic/base/vnic_nic.h
index e318d0cb5..160408522 100644
--- a/drivers/net/enic/base/vnic_nic.h
+++ b/drivers/net/enic/base/vnic_nic.h
@@ -32,8 +32,8 @@
 #define NIC_CFG_RSS_HASH_TYPE_TCP_IPV4		(1 << 2)
 #define NIC_CFG_RSS_HASH_TYPE_IPV6		(1 << 3)
 #define NIC_CFG_RSS_HASH_TYPE_TCP_IPV6		(1 << 4)
-#define NIC_CFG_RSS_HASH_TYPE_IPV6_EX		(1 << 5)
-#define NIC_CFG_RSS_HASH_TYPE_TCP_IPV6_EX	(1 << 6)
+#define NIC_CFG_RSS_HASH_TYPE_RSVD1		(1 << 5)
+#define NIC_CFG_RSS_HASH_TYPE_RSVD2		(1 << 6)
 #define NIC_CFG_RSS_HASH_TYPE_UDP_IPV6		(1 << 7)
 
 static inline void vnic_set_nic_cfg(u32 *nic_cfg,
diff --git a/drivers/net/enic/enic.h b/drivers/net/enic/enic.h
index ee83fe573..ea0a688d3 100644
--- a/drivers/net/enic/enic.h
+++ b/drivers/net/enic/enic.h
@@ -123,6 +123,8 @@ struct enic {
 	u8 filter_actions; /* HW supported actions */
 	bool vxlan;
 	bool disable_overlay; /* devargs disable_overlay=1 */
+	bool nic_cfg_chk;     /* NIC_CFG_CHK available */
+	bool udp_rss_weak;    /* Bodega style UDP RSS */
 
 	unsigned int flags;
 	unsigned int priv_flags;
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
index a25d303de..899603fa7 100644
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -1197,7 +1197,7 @@ int enic_set_rss_conf(struct enic *enic, struct rte_eth_rss_conf *rss_conf)
 			rss_hash_type |= NIC_CFG_RSS_HASH_TYPE_TCP_IPV4;
 		if (rss_hf & ETH_RSS_NONFRAG_IPV4_UDP) {
 			rss_hash_type |= NIC_CFG_RSS_HASH_TYPE_UDP_IPV4;
-			if (ENIC_SETTING(enic, RSSHASH_UDP_WEAK)) {
+			if (enic->udp_rss_weak) {
 				/*
 				 * 'TCP' is not a typo. The "weak" version of
 				 * UDP RSS requires both the TCP and UDP bits
@@ -1213,7 +1213,7 @@ int enic_set_rss_conf(struct enic *enic, struct rte_eth_rss_conf *rss_conf)
 			rss_hash_type |= NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
 		if (rss_hf & (ETH_RSS_NONFRAG_IPV6_UDP | ETH_RSS_IPV6_UDP_EX)) {
 			rss_hash_type |= NIC_CFG_RSS_HASH_TYPE_UDP_IPV6;
-			if (ENIC_SETTING(enic, RSSHASH_UDP_WEAK))
+			if (enic->udp_rss_weak)
 				rss_hash_type |= NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
 		}
 	} else {
@@ -1237,8 +1237,11 @@ int enic_set_rss_conf(struct enic *enic, struct rte_eth_rss_conf *rss_conf)
 		enic->rss_hf = rss_hf;
 		enic->rss_hash_type = rss_hash_type;
 		enic->rss_enable = rss_enable;
+	} else {
+		dev_err(enic, "Failed to update RSS configurations."
+			" hash=0x%x\n", rss_hash_type);
 	}
-	return 0;
+	return ret;
 }
 
 int enic_set_vlan_strip(struct enic *enic)
diff --git a/drivers/net/enic/enic_res.c b/drivers/net/enic/enic_res.c
index 6b404c3c0..d1113b2f1 100644
--- a/drivers/net/enic/enic_res.c
+++ b/drivers/net/enic/enic_res.c
@@ -82,6 +82,8 @@ int enic_get_vnic_config(struct enic *enic)
 			"Error getting filter modes, %d\n", err);
 		return err;
 	}
+	vnic_dev_capable_udp_rss_weak(enic->vdev, &enic->nic_cfg_chk,
+				      &enic->udp_rss_weak);
 
 	dev_info(enic, "Flow api filter mode: %s Actions: %s%s%s\n",
 		((enic->flow_filter_mode == FILTER_DPDK_1) ? "DPDK" :
@@ -124,7 +126,7 @@ int enic_get_vnic_config(struct enic *enic)
 		ENIC_SETTING(enic, RXCSUM) ? "yes" : "no",
 		ENIC_SETTING(enic, RSS) ?
 			(ENIC_SETTING(enic, RSSHASH_UDPIPV4) ? "+UDP" :
-			((ENIC_SETTING(enic, RSSHASH_UDP_WEAK) ? "+udp" :
+			((enic->udp_rss_weak ? "+udp" :
 			"yes"))) : "no",
 		c->intr_mode == VENET_INTR_MODE_INTX ? "INTx" :
 		c->intr_mode == VENET_INTR_MODE_MSI ? "MSI" :
@@ -161,7 +163,7 @@ int enic_get_vnic_config(struct enic *enic)
 	if (ENIC_SETTING(enic, RSSHASH_TCPIPV6))
 		enic->flow_type_rss_offloads |= ETH_RSS_NONFRAG_IPV6_TCP |
 			ETH_RSS_IPV6_TCP_EX;
-	if (ENIC_SETTING(enic, RSSHASH_UDP_WEAK))
+	if (enic->udp_rss_weak)
 		enic->flow_type_rss_offloads |=
 			ETH_RSS_NONFRAG_IPV4_UDP | ETH_RSS_NONFRAG_IPV6_UDP |
 			ETH_RSS_IPV6_UDP_EX;
@@ -235,6 +237,7 @@ int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
 	u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable, u8 tso_ipid_split_en,
 	u8 ig_vlan_strip_en)
 {
+	enum vnic_devcmd_cmd cmd;
 	u64 a0, a1;
 	u32 nic_cfg;
 	int wait = 1000;
@@ -245,8 +248,8 @@ int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
 
 	a0 = nic_cfg;
 	a1 = 0;
-
-	return vnic_dev_cmd(enic->vdev, CMD_NIC_CFG, &a0, &a1, wait);
+	cmd = enic->nic_cfg_chk ? CMD_NIC_CFG_CHK : CMD_NIC_CFG;
+	return vnic_dev_cmd(enic->vdev, cmd, &a0, &a1, wait);
 }
 
 int enic_set_rss_key(struct enic *enic, dma_addr_t key_pa, u64 len)
-- 
2.17.1