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From: Alvaro Karsz <alvaro.karsz@solid-run.com>
To: virtualization@lists.linux-foundation.org
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Subject: [PATCH 2/2] vdpa/snet: support the suspend vDPA callback
Date: Mon, 20 Mar 2023 12:18:17 +0200	[thread overview]
Message-ID: <20230320101817.680402-3-alvaro.karsz@solid-run.com> (raw)
In-Reply-To: <20230320101817.680402-1-alvaro.karsz@solid-run.com>

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

Signed-off-by: Alvaro Karsz <alvaro.karsz@solid-run.com>
---
 drivers/vdpa/solidrun/snet_ctrl.c |  6 ++++++
 drivers/vdpa/solidrun/snet_main.c | 15 +++++++++++++++
 drivers/vdpa/solidrun/snet_vdpa.h |  1 +
 3 files changed, 22 insertions(+)

diff --git a/drivers/vdpa/solidrun/snet_ctrl.c b/drivers/vdpa/solidrun/snet_ctrl.c
index 54909549a00..7bbbbd08e6f 100644
--- a/drivers/vdpa/solidrun/snet_ctrl.c
+++ b/drivers/vdpa/solidrun/snet_ctrl.c
@@ -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
@@ -316,3 +317,8 @@ 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);
+}
diff --git a/drivers/vdpa/solidrun/snet_main.c b/drivers/vdpa/solidrun/snet_main.c
index daeb69d00ed..96830e58211 100644
--- a/drivers/vdpa/solidrun/snet_main.c
+++ b/drivers/vdpa/solidrun/snet_main.c
@@ -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)
diff --git a/drivers/vdpa/solidrun/snet_vdpa.h b/drivers/vdpa/solidrun/snet_vdpa.h
index a4213e97cfc..6dbb95fe2b7 100644
--- a/drivers/vdpa/solidrun/snet_vdpa.h
+++ b/drivers/vdpa/solidrun/snet_vdpa.h
@@ -201,5 +201,6 @@ 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_
-- 
2.34.1

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  parent reply	other threads:[~2023-03-20 10:18 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-20 10:18 [PATCH 0/2] vdpa/snet: support [s/g]et_vq_state and suspend Alvaro Karsz
2023-03-20 10:18 ` [PATCH 1/2] vdpa/snet: support getting and setting VQ state Alvaro Karsz
2023-03-20 10:18 ` Alvaro Karsz [this message]
2023-03-27  6:49 ` [PATCH 0/2] vdpa/snet: support [s/g]et_vq_state and suspend Alvaro Karsz
2023-03-27 12:33   ` Michael S. Tsirkin
2023-04-02  8:36     ` Alvaro Karsz
2023-04-02 12:31       ` Michael S. Tsirkin

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