Eli Cohen cc43c56d73 vdpa/mlx5: Use consistent RQT size ... [ Upstream commit acde392949 ] The current code evaluates RQT size based on the configured number of virtqueues. This can raise an issue in the following scenario: Assume MQ was negotiated. 1. mlx5_vdpa_set_map() gets called. 2. handle_ctrl_mq() is called setting cur_num_vqs to some value, lower than the configured max VQs. 3. A second set_map gets called, but now a smaller number of VQs is used to evaluate the size of the RQT. 4. handle_ctrl_mq() is called with a value larger than what the RQT can hold. This will emit errors and the driver state is compromised. To fix this, we use a new field in struct mlx5_vdpa_net to hold the required number of entries in the RQT. This value is evaluated in mlx5_vdpa_set_driver_features() where we have the negotiated features all set up. In addition to that, we take into consideration the max capability of RQT entries early when the device is added so we don't need to take consider it when creating the RQT. Last, we remove the use of mlx5_vdpa_max_qps() which just returns the max_vas / 2 and make the code clearer. Fixes: 52893733f2 ("vdpa/mlx5: Add multiqueue support") Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Eli Cohen <elic@nvidia.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-05-25 09:59:11 +02:00
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alibaba	vdpa: Provide interface to read driver features	2022-01-14 18:50:53 -05:00
ifcvf	vdpa: Provide interface to read driver features	2022-01-14 18:50:53 -05:00
mlx5	vdpa/mlx5: Use consistent RQT size	2022-05-25 09:59:11 +02:00
vdpa_sim	vdpa/vdpa_sim_net: Report max device capabilities	2022-01-14 18:50:54 -05:00
vdpa_user	vduse: Fix returning wrong type in vduse_domain_alloc_iova()	2022-03-04 11:56:34 -05:00
virtio_pci	vdpa: fix use-after-free on vp_vdpa_remove	2022-03-06 06:06:50 -05:00
Kconfig	eni_vdpa: add vDPA driver for Alibaba ENI	2021-11-01 05:23:41 -04:00
Makefile	eni_vdpa: add vDPA driver for Alibaba ENI	2021-11-01 05:23:41 -04:00
vdpa.c	vdpa: factor out vdpa_set_features_unlocked for vdpa internal use	2022-03-04 11:56:33 -05:00