[dpdk-stable] [dpdk-dev] [PATCH v3] net/i40e: fix exception with multi-driver

[Ye Xiaolong]

On 10/08, alvinx.zhang at intel.com wrote:
>From: Alvin Zhang <alvinx.zhang at intel.com>
>
>If support-multi-driver is enabled, the global registers should not
>be configured. But with the current code base, if creating a flow
>with rte_flow API, the global register GLQF_FD_MSK may be changed.
>
>Fixes: cfdfca493cae ("net/i40e: fix multiple driver support")
>Cc: stable at dpdk.org
>
>Signed-off-by: root <alvinx.zhang at intel.com>

The signature should be Alvin Zhang <alvinx.zhang at intel.com>, fixed it while
merging.

>--
>
>v3: modify codes according to the comments.
>v2: modify codes according to the comments.

Better to be specific about the changes you made for each version.

>---
> drivers/net/i40e/i40e_flow.c | 38 +++++++++++++++++++++++++++++++-------
> 1 file changed, 31 insertions(+), 7 deletions(-)
>
>diff --git a/drivers/net/i40e/i40e_flow.c b/drivers/net/i40e/i40e_flow.c
>index e902a35..f9c3183 100644
>--- a/drivers/net/i40e/i40e_flow.c
>+++ b/drivers/net/i40e/i40e_flow.c
>@@ -2349,6 +2349,37 @@ static int i40e_flow_destroy_tunnel_filter(struct i40e_pf *pf,
> 	if (num < 0)
> 		return -EINVAL;
> 
>+	if (pf->support_multi_driver) {
>+		for (i = 0; i < num; i++)
>+			if (i40e_read_rx_ctl(hw,
>+					I40E_GLQF_FD_MSK(i, pctype)) !=
>+					mask_reg[i]) {
>+				PMD_DRV_LOG(ERR, "Input set setting is not"
>+						" supported with"
>+						" `support-multi-driver`"
>+						" enabled!");
>+				return -EPERM;
>+			}
>+		for (i = num; i < I40E_INSET_MASK_NUM_REG; i++)
>+			if (i40e_read_rx_ctl(hw,
>+					I40E_GLQF_FD_MSK(i, pctype)) != 0) {
>+				PMD_DRV_LOG(ERR, "Input set setting is not"
>+						" supported with"
>+						" `support-multi-driver`"
>+						" enabled!");
>+				return -EPERM;
>+			}
>+
>+	} else {
>+		for (i = 0; i < num; i++)
>+			i40e_check_write_reg(hw, I40E_GLQF_FD_MSK(i, pctype),
>+				mask_reg[i]);
>+		/*clear unused mask registers of the pctype */
>+		for (i = num; i < I40E_INSET_MASK_NUM_REG; i++)
>+			i40e_check_write_reg(hw,
>+					I40E_GLQF_FD_MSK(i, pctype), 0);
>+	}
>+
> 	inset_reg |= i40e_translate_input_set_reg(hw->mac.type, input_set);
> 
> 	i40e_check_write_reg(hw, I40E_PRTQF_FD_INSET(pctype, 0),
>@@ -2357,13 +2388,6 @@ static int i40e_flow_destroy_tunnel_filter(struct i40e_pf *pf,
> 			     (uint32_t)((inset_reg >>
> 					 I40E_32_BIT_WIDTH) & UINT32_MAX));
> 
>-	for (i = 0; i < num; i++)
>-		i40e_check_write_reg(hw, I40E_GLQF_FD_MSK(i, pctype),
>-				     mask_reg[i]);
>-
>-	/*clear unused mask registers of the pctype */
>-	for (i = num; i < I40E_INSET_MASK_NUM_REG; i++)
>-		i40e_check_write_reg(hw, I40E_GLQF_FD_MSK(i, pctype), 0);
> 	I40E_WRITE_FLUSH(hw);
> 
> 	pf->fdir.input_set[pctype] = input_set;
>-- 
>1.8.3.1
>

Reviewed-by: Xiaolong Ye <xiaolong.ye at intel.com>

Applied to dpdk-next-net-intel. Thanks.