net/vmxnet3: add v4 boot and guest UDP RSS config

This patch introduces:
- VMxnet3 v4 negotiation and,
- entirely guest-driven UDP RSS support.

VMxnet3 v3 already has UDP RSS support, however it
depends on hypervisor provisioning on the VM through
ESX specific flags, which are not transparent or known
to the guest later on.

Vmxnet3 v4 introduces a new API transaction which allows
configuring RSS entirely from the guest. This API must be
invoked after device shared mem region is initialized.

IPv4 ESP RSS (SPI based) is also available, but currently
there are no ESP RSS definitions on rte_eth layer to
handle that.

Signed-off-by: Eduard Serra <eserra@vmware.com>
Acked-by: Yong Wang <yongwang@vmware.com>

diff --git a/drivers/net/vmxnet3/base/vmxnet3_defs.h b/drivers/net/vmxnet3/base/vmxnet3_defs.h
index bbec708cf36eeb3ca5b060b29d4c665695eccefe..296d7e54c330691ffbbd65d6f1e173ed5853a448 100644 (file)
--- a/drivers/net/vmxnet3/base/vmxnet3_defs.h
+++ b/drivers/net/vmxnet3/base/vmxnet3_defs.h
@@ -89,6 +89,7 @@ typedef enum {
    VMXNET3_CMD_RESERVED3,
    VMXNET3_CMD_RESERVED4,
    VMXNET3_CMD_REGISTER_MEMREGS,
+   VMXNET3_CMD_SET_RSS_FIELDS,
 
    VMXNET3_CMD_FIRST_GET = 0xF00D0000,
    VMXNET3_CMD_GET_QUEUE_STATUS = VMXNET3_CMD_FIRST_GET,
@@ -749,6 +750,15 @@ struct Vmxnet3_MemRegs {
 #include "vmware_pack_end.h"
 Vmxnet3_MemRegs;
 
+typedef enum Vmxnet3_RSSField {
+   VMXNET3_RSS_FIELDS_TCPIP4 = 0x0001,
+   VMXNET3_RSS_FIELDS_TCPIP6 = 0x0002,
+   VMXNET3_RSS_FIELDS_UDPIP4 = 0x0004,
+   VMXNET3_RSS_FIELDS_UDPIP6 = 0x0008,
+   VMXNET3_RSS_FIELDS_ESPIP4 = 0x0010,
+   VMXNET3_RSS_FIELDS_ESPIP6 = 0x0020,
+} Vmxnet3_RSSField;
+
 /*
  * If the command data <= 16 bytes, use the shared memory direcly.
  * Otherwise, use the variable length configuration descriptor.
@@ -758,6 +768,8 @@ typedef
 union Vmxnet3_CmdInfo {
    Vmxnet3_VariableLenConfDesc varConf;
    Vmxnet3_SetPolling          setPolling;
+   Vmxnet3_RSSField            setRSSFields;
+   __le16                      reserved[2];
    __le64                      data[2];
 }
 #include "vmware_pack_end.h"

diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.c b/drivers/net/vmxnet3/vmxnet3_ethdev.c
index 93e5de9a7386627901e5dc8afa7d3b8dbb9cc9b4..846d7fd7a94e2139e9a683d39af928bf3fe438c5 100644 (file)
--- a/drivers/net/vmxnet3/vmxnet3_ethdev.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethdev.c
@@ -266,7 +266,11 @@ eth_vmxnet3_dev_init(struct rte_eth_dev *eth_dev)
        ver = VMXNET3_READ_BAR1_REG(hw, VMXNET3_REG_VRRS);
        PMD_INIT_LOG(DEBUG, "Hardware version : %d", ver);
 
-       if (ver & (1 << VMXNET3_REV_3)) {
+       if (ver & (1 << VMXNET3_REV_4)) {
+               VMXNET3_WRITE_BAR1_REG(hw, VMXNET3_REG_VRRS,
+                                      1 << VMXNET3_REV_4);
+               hw->version = VMXNET3_REV_4 + 1;
+       } else if (ver & (1 << VMXNET3_REV_3)) {
                VMXNET3_WRITE_BAR1_REG(hw, VMXNET3_REG_VRRS,
                                       1 << VMXNET3_REV_3);
                hw->version = VMXNET3_REV_3 + 1;
@@ -764,6 +768,15 @@ vmxnet3_dev_start(struct rte_eth_dev *dev)
                PMD_INIT_LOG(DEBUG, "Failed to setup memory region\n");
        }
 
+       if (VMXNET3_VERSION_GE_4(hw)) {
+               /* Check for additional RSS  */
+               ret = vmxnet3_v4_rss_configure(dev);
+               if (ret != VMXNET3_SUCCESS) {
+                       PMD_INIT_LOG(ERR, "Failed to configure v4 RSS");
+                       return ret;
+               }
+       }
+
        /* Disable interrupts */
        vmxnet3_disable_intr(hw);
 
@@ -1141,6 +1154,8 @@ static void
 vmxnet3_dev_info_get(struct rte_eth_dev *dev __rte_unused,
                     struct rte_eth_dev_info *dev_info)
 {
+       struct vmxnet3_hw *hw = dev->data->dev_private;
+
        dev_info->max_rx_queues = VMXNET3_MAX_RX_QUEUES;
        dev_info->max_tx_queues = VMXNET3_MAX_TX_QUEUES;
        dev_info->min_rx_bufsize = 1518 + RTE_PKTMBUF_HEADROOM;
@@ -1150,6 +1165,10 @@ vmxnet3_dev_info_get(struct rte_eth_dev *dev __rte_unused,
 
        dev_info->flow_type_rss_offloads = VMXNET3_RSS_OFFLOAD_ALL;
 
+       if (VMXNET3_VERSION_GE_4(hw)) {
+               dev_info->flow_type_rss_offloads |= VMXNET3_V4_RSS_MASK;
+       }
+
        dev_info->rx_desc_lim = (struct rte_eth_desc_lim) {
                .nb_max = VMXNET3_RX_RING_MAX_SIZE,
                .nb_min = VMXNET3_DEF_RX_RING_SIZE,

diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.h b/drivers/net/vmxnet3/vmxnet3_ethdev.h
index 5bc3a84c9abbd27d13dbea952f51003d672e8472..319d73926ef7d7941ec8184a5227ead05957620c 100644 (file)
--- a/drivers/net/vmxnet3/vmxnet3_ethdev.h
+++ b/drivers/net/vmxnet3/vmxnet3_ethdev.h
@@ -34,6 +34,10 @@
        ETH_RSS_IPV6 | \
        ETH_RSS_NONFRAG_IPV6_TCP)
 
+#define VMXNET3_V4_RSS_MASK ( \
+       ETH_RSS_NONFRAG_IPV4_UDP | \
+       ETH_RSS_NONFRAG_IPV6_UDP)
+
 /* RSS configuration structure - shared with device through GPA */
 typedef struct VMXNET3_RSSConf {
        uint16_t   hashType;
@@ -103,10 +107,12 @@ struct vmxnet3_hw {
        UPT1_RxStats          snapshot_rx_stats[VMXNET3_MAX_RX_QUEUES];
 };
 
+#define VMXNET3_REV_4          3               /* Vmxnet3 Rev. 4 */
 #define VMXNET3_REV_3          2               /* Vmxnet3 Rev. 3 */
 #define VMXNET3_REV_2          1               /* Vmxnet3 Rev. 2 */
 #define VMXNET3_REV_1          0               /* Vmxnet3 Rev. 1 */
 
+#define VMXNET3_VERSION_GE_4(hw) ((hw)->version >= VMXNET3_REV_4 + 1)
 #define VMXNET3_VERSION_GE_3(hw) ((hw)->version >= VMXNET3_REV_3 + 1)
 #define VMXNET3_VERSION_GE_2(hw) ((hw)->version >= VMXNET3_REV_2 + 1)
 
@@ -162,6 +168,8 @@ void vmxnet3_dev_clear_queues(struct rte_eth_dev *dev);
 void vmxnet3_dev_rx_queue_release(void *rxq);
 void vmxnet3_dev_tx_queue_release(void *txq);
 
+int vmxnet3_v4_rss_configure(struct rte_eth_dev *dev);
+
 int  vmxnet3_dev_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
                                uint16_t nb_rx_desc, unsigned int socket_id,
                                const struct rte_eth_rxconf *rx_conf,

diff --git a/drivers/net/vmxnet3/vmxnet3_rxtx.c b/drivers/net/vmxnet3/vmxnet3_rxtx.c
index d30914a8a620693457866f884311dea502b8e4be..4867a64f377418df3015641aebeea763988a09d5 100644 (file)
--- a/drivers/net/vmxnet3/vmxnet3_rxtx.c
+++ b/drivers/net/vmxnet3/vmxnet3_rxtx.c
@@ -1291,6 +1291,46 @@ static uint8_t rss_intel_key[40] = {
        0x6A, 0x42, 0xB7, 0x3B, 0xBE, 0xAC, 0x01, 0xFA,
 };
 
+/*
+ * Additional RSS configurations based on vmxnet v4+ APIs
+ */
+int
+vmxnet3_v4_rss_configure(struct rte_eth_dev *dev)
+{
+       struct vmxnet3_hw *hw = dev->data->dev_private;
+       Vmxnet3_DriverShared *shared = hw->shared;
+       Vmxnet3_CmdInfo *cmdInfo = &shared->cu.cmdInfo;
+       struct rte_eth_rss_conf *port_rss_conf;
+       uint64_t rss_hf;
+       uint32_t ret;
+
+       PMD_INIT_FUNC_TRACE();
+
+       cmdInfo->setRSSFields = 0;
+       port_rss_conf = &dev->data->dev_conf.rx_adv_conf.rss_conf;
+       rss_hf = port_rss_conf->rss_hf &
+               (VMXNET3_V4_RSS_MASK | VMXNET3_RSS_OFFLOAD_ALL);
+
+       if (rss_hf & ETH_RSS_NONFRAG_IPV4_TCP)
+               cmdInfo->setRSSFields |= VMXNET3_RSS_FIELDS_TCPIP4;
+       if (rss_hf & ETH_RSS_NONFRAG_IPV6_TCP)
+               cmdInfo->setRSSFields |= VMXNET3_RSS_FIELDS_TCPIP6;
+       if (rss_hf & ETH_RSS_NONFRAG_IPV4_UDP)
+               cmdInfo->setRSSFields |= VMXNET3_RSS_FIELDS_UDPIP4;
+       if (rss_hf & ETH_RSS_NONFRAG_IPV6_UDP)
+               cmdInfo->setRSSFields |= VMXNET3_RSS_FIELDS_UDPIP6;
+
+       VMXNET3_WRITE_BAR1_REG(hw, VMXNET3_REG_CMD,
+                              VMXNET3_CMD_SET_RSS_FIELDS);
+       ret = VMXNET3_READ_BAR1_REG(hw, VMXNET3_REG_CMD);
+
+       if (ret != VMXNET3_SUCCESS) {
+               PMD_DRV_LOG(ERR, "Set RSS fields (v4) failed: %d", ret);
+       }
+
+       return ret;
+}
+
 /*
  * Configure RSS feature
  */