linux-kernel - [RFC PATCH 25/30] coco/tdx_tsm: Add connect()/disconnect() handlers prototype

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Message-Id: <20250529053513.1592088-26-yilun.xu@linux.intel.com>
Date: Thu, 29 May 2025 13:35:08 +0800
From: Xu Yilun <yilun.xu@...ux.intel.com>
To: kvm@...r.kernel.org,
	sumit.semwal@...aro.org,
	christian.koenig@....com,
	pbonzini@...hat.com,
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	alex.williamson@...hat.com,
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	linux-coco@...ts.linux.dev
Cc: dri-devel@...ts.freedesktop.org,
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Subject: [RFC PATCH 25/30] coco/tdx_tsm: Add connect()/disconnect() handlers prototype

From: Wu Hao <hao.wu@...el.com>

Add basic skeleton for connect()/disconnect() handlers. The major steps
are SPDM setup first and then IDE selective stream setup.

No detailed TDX Connect implementation.

Signed-off-by: Wu Hao <hao.wu@...el.com>
Signed-off-by: Xu Yilun <yilun.xu@...ux.intel.com>
---
 drivers/virt/coco/host/tdx_tsm.c | 55 +++++++++++++++++++++++++++++++-
 1 file changed, 54 insertions(+), 1 deletion(-)

diff --git a/drivers/virt/coco/host/tdx_tsm.c b/drivers/virt/coco/host/tdx_tsm.c
index 72f3705fe7bb..d1a8384d8339 100644
--- a/drivers/virt/coco/host/tdx_tsm.c
+++ b/drivers/virt/coco/host/tdx_tsm.c
@@ -79,13 +79,66 @@ static int tdx_tsm_guest_req(struct pci_dev *pdev,
 	return -ENXIO;
 }
 
+static int tdx_tsm_spdm_session_setup(struct tdx_tsm *ttsm)
+{
+	return 0;
+}
+
+static int tdx_tsm_spdm_session_teardown(struct tdx_tsm *ttsm)
+{
+	return 0;
+}
+
+static int tdx_tsm_ide_stream_setup(struct tdx_tsm *ttsm)
+{
+	return 0;
+}
+
+static int tdx_tsm_ide_stream_teardown(struct tdx_tsm *ttsm)
+{
+	return 0;
+}
+
 static int tdx_tsm_connect(struct pci_dev *pdev)
 {
-	return -ENXIO;
+	struct tdx_tsm *ttsm = to_tdx_tsm(pdev->tsm);
+	int ret;
+
+	ret = tdx_tsm_spdm_session_setup(ttsm);
+	if (ret) {
+		pci_err(pdev, "fail to setup spdm session\n");
+		return ret;
+	}
+
+	ret = tdx_tsm_ide_stream_setup(ttsm);
+	if (ret) {
+		pci_err(pdev, "fail to setup ide stream\n");
+		tdx_tsm_spdm_session_teardown(ttsm);
+		return ret;
+	}
+
+	pci_dbg(pdev, "%s complete\n", __func__);
+	return ret;
 }
 
 static void tdx_tsm_disconnect(struct pci_dev *pdev)
 {
+	struct tdx_tsm *ttsm = to_tdx_tsm(pdev->tsm);
+	int ret;
+
+	ret = tdx_tsm_ide_stream_teardown(ttsm);
+	if (ret) {
+		pci_err(pdev, "fail to teardown ide stream\n");
+		return;
+	}
+
+	ret = tdx_tsm_spdm_session_teardown(ttsm);
+	if (ret) {
+		pci_err(pdev, "fail to teadown spdm session\n");
+		return;
+	}
+
+	pci_dbg(pdev, "%s complete\n", __func__);
 }
 
 static struct pci_tsm *tdx_tsm_pci_probe(struct pci_dev *pdev)
-- 
2.25.1