linux-kernel - [PATCH 1/2] vDPA/ifcvf: record virtio notify base

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Message-Id: <20210428082133.6766-2-lingshan.zhu@intel.com>
Date:   Wed, 28 Apr 2021 16:21:32 +0800
From:   Zhu Lingshan <lingshan.zhu@...el.com>
To:     jasowang@...hat.com, mst@...hat.com
Cc:     virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Zhu Lingshan <lingshan.zhu@...el.com>
Subject: [PATCH 1/2] vDPA/ifcvf: record virtio notify base

This commit records virtio notify base addr to implemente
doorbell mapping feature

Signed-off-by: Zhu Lingshan <lingshan.zhu@...el.com>
---
 drivers/vdpa/ifcvf/ifcvf_base.c | 1 +
 drivers/vdpa/ifcvf/ifcvf_base.h | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/vdpa/ifcvf/ifcvf_base.c b/drivers/vdpa/ifcvf/ifcvf_base.c
index 1a661ab45af5..cc61a5bfc5b1 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.c
+++ b/drivers/vdpa/ifcvf/ifcvf_base.c
@@ -133,6 +133,7 @@ int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *pdev)
 					      &hw->notify_off_multiplier);
 			hw->notify_bar = cap.bar;
 			hw->notify_base = get_cap_addr(hw, &cap);
+			hw->notify_pa = pci_resource_start(pdev, cap.bar) + cap.offset;
 			IFCVF_DBG(pdev, "hw->notify_base = %p\n",
 				  hw->notify_base);
 			break;
diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h
index 0111bfdeb342..bcca7c1669dd 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.h
+++ b/drivers/vdpa/ifcvf/ifcvf_base.h
@@ -98,6 +98,7 @@ struct ifcvf_hw {
 	char config_msix_name[256];
 	struct vdpa_callback config_cb;
 	unsigned int config_irq;
+	phys_addr_t  notify_pa;
 };
 
 struct ifcvf_adapter {
-- 
2.27.0