From: Jorgen Hansen <jhansen@vmware.com>
To: linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org
Cc: pv-drivers@vmware.com, gregkh@linuxfoundation.org,
Vishnu Dasa <vdasa@vmware.com>,
Jorgen Hansen <jhansen@vmware.com>
Subject: [PATCH v3 4/8] VMCI: dma dg: set OS page size
Date: Mon, 7 Feb 2022 02:27:21 -0800 [thread overview]
Message-ID: <20220207102725.2742-5-jhansen@vmware.com> (raw)
In-Reply-To: <20220207102725.2742-1-jhansen@vmware.com>
Tell the device the page size used by the OS.
Reviewed-by: Vishnu Dasa <vdasa@vmware.com>
Signed-off-by: Jorgen Hansen <jhansen@vmware.com>
---
drivers/misc/vmw_vmci/vmci_guest.c | 4 ++++
include/linux/vmw_vmci_defs.h | 1 +
2 files changed, 5 insertions(+)
diff --git a/drivers/misc/vmw_vmci/vmci_guest.c b/drivers/misc/vmw_vmci/vmci_guest.c
index b93afe7f7119..ced187e7ac08 100644
--- a/drivers/misc/vmw_vmci/vmci_guest.c
+++ b/drivers/misc/vmw_vmci/vmci_guest.c
@@ -578,6 +578,10 @@ static int vmci_guest_probe_device(struct pci_dev *pdev,
/* Let the host know which capabilities we intend to use. */
vmci_write_reg(vmci_dev, caps_in_use, VMCI_CAPS_ADDR);
+ /* Let the device know the size for pages passed down. */
+ if (caps_in_use & VMCI_CAPS_DMA_DATAGRAM)
+ vmci_write_reg(vmci_dev, PAGE_SHIFT, VMCI_GUEST_PAGE_SHIFT);
+
/* Set up global device so that we can start sending datagrams */
spin_lock_irq(&vmci_dev_spinlock);
vmci_dev_g = vmci_dev;
diff --git a/include/linux/vmw_vmci_defs.h b/include/linux/vmw_vmci_defs.h
index 1ce2cffdc3ae..4167779469fd 100644
--- a/include/linux/vmw_vmci_defs.h
+++ b/include/linux/vmw_vmci_defs.h
@@ -21,6 +21,7 @@
#define VMCI_CAPS_ADDR 0x18
#define VMCI_RESULT_LOW_ADDR 0x1c
#define VMCI_RESULT_HIGH_ADDR 0x20
+#define VMCI_GUEST_PAGE_SHIFT 0x34
/* Max number of devices. */
#define VMCI_MAX_DEVICES 1
--
2.25.1
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WARNING: multiple messages have this Message-ID (diff)
From: Jorgen Hansen <jhansen@vmware.com>
To: linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org
Cc: gregkh@linuxfoundation.org, pv-drivers@vmware.com,
Jorgen Hansen <jhansen@vmware.com>,
Vishnu Dasa <vdasa@vmware.com>
Subject: [PATCH v3 4/8] VMCI: dma dg: set OS page size
Date: Mon, 7 Feb 2022 02:27:21 -0800 [thread overview]
Message-ID: <20220207102725.2742-5-jhansen@vmware.com> (raw)
In-Reply-To: <20220207102725.2742-1-jhansen@vmware.com>
Tell the device the page size used by the OS.
Reviewed-by: Vishnu Dasa <vdasa@vmware.com>
Signed-off-by: Jorgen Hansen <jhansen@vmware.com>
---
drivers/misc/vmw_vmci/vmci_guest.c | 4 ++++
include/linux/vmw_vmci_defs.h | 1 +
2 files changed, 5 insertions(+)
diff --git a/drivers/misc/vmw_vmci/vmci_guest.c b/drivers/misc/vmw_vmci/vmci_guest.c
index b93afe7f7119..ced187e7ac08 100644
--- a/drivers/misc/vmw_vmci/vmci_guest.c
+++ b/drivers/misc/vmw_vmci/vmci_guest.c
@@ -578,6 +578,10 @@ static int vmci_guest_probe_device(struct pci_dev *pdev,
/* Let the host know which capabilities we intend to use. */
vmci_write_reg(vmci_dev, caps_in_use, VMCI_CAPS_ADDR);
+ /* Let the device know the size for pages passed down. */
+ if (caps_in_use & VMCI_CAPS_DMA_DATAGRAM)
+ vmci_write_reg(vmci_dev, PAGE_SHIFT, VMCI_GUEST_PAGE_SHIFT);
+
/* Set up global device so that we can start sending datagrams */
spin_lock_irq(&vmci_dev_spinlock);
vmci_dev_g = vmci_dev;
diff --git a/include/linux/vmw_vmci_defs.h b/include/linux/vmw_vmci_defs.h
index 1ce2cffdc3ae..4167779469fd 100644
--- a/include/linux/vmw_vmci_defs.h
+++ b/include/linux/vmw_vmci_defs.h
@@ -21,6 +21,7 @@
#define VMCI_CAPS_ADDR 0x18
#define VMCI_RESULT_LOW_ADDR 0x1c
#define VMCI_RESULT_HIGH_ADDR 0x20
+#define VMCI_GUEST_PAGE_SHIFT 0x34
/* Max number of devices. */
#define VMCI_MAX_DEVICES 1
--
2.25.1
next prev parent reply other threads:[~2022-02-07 10:33 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-07 10:27 [PATCH v3 0/8] VMCI: dma dg: Add support for DMA datagrams Jorgen Hansen
2022-02-07 10:27 ` Jorgen Hansen
2022-02-07 10:27 ` [PATCH v3 1/8] VMCI: dma dg: whitespace formatting change for vmci register defines Jorgen Hansen
2022-02-07 10:27 ` Jorgen Hansen
2022-02-07 10:27 ` [PATCH v3 2/8] VMCI: dma dg: add MMIO access to registers Jorgen Hansen
2022-02-07 10:27 ` Jorgen Hansen
2022-02-07 10:27 ` [PATCH v3 3/8] VMCI: dma dg: detect DMA datagram capability Jorgen Hansen
2022-02-07 10:27 ` Jorgen Hansen
2022-02-07 10:27 ` Jorgen Hansen [this message]
2022-02-07 10:27 ` [PATCH v3 4/8] VMCI: dma dg: set OS page size Jorgen Hansen
2022-02-07 10:27 ` [PATCH v3 5/8] VMCI: dma dg: register dummy IRQ handlers for DMA datagrams Jorgen Hansen
2022-02-07 10:27 ` Jorgen Hansen
2022-02-07 10:27 ` [PATCH v3 6/8] VMCI: dma dg: allocate send and receive buffers " Jorgen Hansen
2022-02-07 10:27 ` Jorgen Hansen
2022-02-07 10:27 ` [PATCH v3 7/8] VMCI: dma dg: add support for DMA datagrams sends Jorgen Hansen
2022-02-07 10:27 ` Jorgen Hansen
2022-02-07 10:27 ` [PATCH v3 8/8] VMCI: dma dg: add support for DMA datagrams receive Jorgen Hansen
2022-02-07 10:27 ` Jorgen Hansen
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