From: Luca Boccassi <bl...@debian.org>
This reset function will stop and restart the device, and then reset
the stats and check that the registers have been updated.
Signed-off-by: Luca Boccassi <bl...@debian.org>
---
drivers/net/e1000/igb_ethdev.c | 59 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 59 insertions(+)
diff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c
index 003bdf0f6..1211d5371 100644
--- a/drivers/net/e1000/igb_ethdev.c
+++ b/drivers/net/e1000/igb_ethdev.c
@@ -280,6 +280,7 @@ static void eth_igb_configure_msix_intr(struct rte_eth_dev
*dev);
static void eth_igbvf_interrupt_handler(void *param);
static void igbvf_mbx_process(struct rte_eth_dev *dev);
static int igb_filter_restore(struct rte_eth_dev *dev);
+static int igbvf_dev_reset(struct rte_eth_dev *dev);
/*
* Define VF Stats MACRO for Non "cleared on read" register
@@ -468,6 +469,7 @@ static const struct eth_dev_ops igbvf_eth_dev_ops = {
.txq_info_get = igb_txq_info_get,
.mac_addr_set = igbvf_default_mac_addr_set,
.get_reg = igbvf_get_regs,
+ .dev_reset = igbvf_dev_reset,
};
/* store statistics names and its offset in stats structure */
@@ -2975,6 +2977,63 @@ void igbvf_mbx_process(struct rte_eth_dev *dev)
}
static int
+igbvf_dev_reset(struct rte_eth_dev *dev)
+{
+ struct e1000_hw *hw =
+ E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+ int diag = 0;
+ uint32_t eiam;
+ /* Reference igbvf_intr_enable */
+ uint32_t eiam_mbx = 1 << E1000_VTIVAR_MISC_MAILBOX;
+
+ /* Nothing needs to be done if the device is not started. */
+ if (!dev->data->dev_started)
+ return -EAGAIN;
+
+ PMD_DRV_LOG(DEBUG, "Link up/down event detected.");
+
+ /* Performance VF reset. */
+ do {
+ dev->data->dev_started = 0;
+ igbvf_dev_stop(dev);
+ if (dev->data->dev_conf.intr_conf.lsc == 0)
+ diag = eth_igb_link_update(dev, 0);
+ if (diag) {
+ PMD_INIT_LOG(INFO, "Igb VF reset: "
+ "Failed to update link.");
+ }
+ rte_delay_ms(1000);
+
+ diag = igbvf_dev_start(dev);
+ dev->data->dev_started = 1;
+ if (diag) {
+ PMD_INIT_LOG(ERR, "Igb VF reset: "
+ "Failed to start device.");
+ return -EAGAIN;
+ }
+ eth_igbvf_stats_reset(dev);
+ if (dev->data->dev_conf.intr_conf.lsc == 0)
+ diag = eth_igb_link_update(dev, 0);
+ if (diag) {
+ PMD_INIT_LOG(INFO, "Igb VF reset: "
+ "Failed to update link.");
+ }
+
+ /**
+ * When the PF link is down, there is a chance
+ * that the VF cannot operate its registers.
+ * Check if the registers are written
+ * successfully. If not, repeat stop/start until
+ * the PF link is up, in other words, until the
+ * registers can be written.
+ */
+ eiam = E1000_READ_REG(hw, E1000_EIAM);
+ } while (!(eiam & eiam_mbx));
+
+ return 0;
+}
+
+static int
eth_igbvf_interrupt_action(struct rte_eth_dev *dev, struct rte_intr_handle
*intr_handle)
{
struct e1000_interrupt *intr =
--
2.11.0
