Commit 3616bf37 authored by Alvaro Karsz's avatar Alvaro Karsz Committed by Michael S. Tsirkin
Browse files

vdpa/snet: support the suspend vDPA callback 



When suspend is called, the driver sends a suspend command to the DPU
through the control mechanism.

Signed-off-by: default avatarAlvaro Karsz <alvaro.karsz@solid-run.com>
Message-Id: <20230413073337.31367-3-alvaro.karsz@solid-run.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Acked-by: default avatarJason Wang <jasowang@redhat.com>
parent 3f3a1675

drivers/vdpa/solidrun/snet_ctrl.c

+6 −0
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ 
enum snet_ctrl_opcodes {

	SNET_CTRL_OP_DESTROY = 1,

	SNET_CTRL_OP_READ_VQ_STATE,

	SNET_CTRL_OP_SUSPEND,

};



#define SNET_CTRL_TIMEOUT	        2000000
@@ -322,3 +323,8 @@ int snet_read_vq_state(struct snet *snet, u16 idx, struct vdpa_vq_state *state) 
	return snet_ctrl_read_from_dpu(snet, SNET_CTRL_OP_READ_VQ_STATE, idx, state,

				       sizeof(*state));

}



int snet_suspend_dev(struct snet *snet)

{

	return snet_send_ctrl_msg(snet, SNET_CTRL_OP_SUSPEND, 0);

}

drivers/vdpa/solidrun/snet_main.c

+15 −0
Original line number Diff line number Diff line
@@ -483,6 +483,20 @@ static void snet_set_config(struct vdpa_device *vdev, unsigned int offset, 
		iowrite8(*buf_ptr++, cfg_ptr + i);

}



static int snet_suspend(struct vdpa_device *vdev)

{

	struct snet *snet = vdpa_to_snet(vdev);

	int ret;



	ret = snet_suspend_dev(snet);

	if (ret)

		SNET_ERR(snet->pdev, "SNET[%u] suspend failed, err: %d\n", snet->sid, ret);

	else

		SNET_DBG(snet->pdev, "Suspend SNET[%u] device\n", snet->sid);



	return ret;

}



static const struct vdpa_config_ops snet_config_ops = {

	.set_vq_address         = snet_set_vq_address,

	.set_vq_num             = snet_set_vq_num,
@@ -508,6 +522,7 @@ static const struct vdpa_config_ops snet_config_ops = { 
	.set_status             = snet_set_status,

	.get_config             = snet_get_config,

	.set_config             = snet_set_config,

	.suspend		= snet_suspend,

};



static int psnet_open_pf_bar(struct pci_dev *pdev, struct psnet *psnet)

drivers/vdpa/solidrun/snet_vdpa.h

+1 −0
Original line number Diff line number Diff line
@@ -203,5 +203,6 @@ void psnet_create_hwmon(struct pci_dev *pdev); 
void snet_ctrl_clear(struct snet *snet);

int snet_destroy_dev(struct snet *snet);

int snet_read_vq_state(struct snet *snet, u16 idx, struct vdpa_vq_state *state);

int snet_suspend_dev(struct snet *snet);



#endif //_SNET_VDPA_H_