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From: Srikanth Kaka <srikanth.k@oneconvergence.com>
To: Stephen Hemminger <sthemmin@microsoft.com>,
	Long Li <longli@microsoft.com>
Cc: dev@dpdk.org, Vag Singh <vag.singh@oneconvergence.com>,
	Anand Thulasiram <avelu@juniper.net>,
	Srikanth Kaka <srikanth.k@oneconvergence.com>
Subject: [PATCH v4 09/14] bus/vmbus: open subchannels
Date: Mon, 18 Apr 2022 09:59:10 +0530	[thread overview]
Message-ID: <20220418042915.5765-10-srikanth.k@oneconvergence.com> (raw)
In-Reply-To: <20220418042915.5765-1-srikanth.k@oneconvergence.com>

In FreeBSD, unlike Linux there is no sub-channel open callback that
could be called by HV_UIO driver upon their grant by the hypervisor.
Thus the PMD makes an IOCTL to the HV_UIO to open the sub-channels

On Linux, the vmbus_uio_subchan_open() will always return success
as the Linux HV_UIO opens them implicitly.

Signed-off-by: Srikanth Kaka <srikanth.k@oneconvergence.com>
Signed-off-by: Vag Singh <vag.singh@oneconvergence.com>
Signed-off-by: Anand Thulasiram <avelu@juniper.net>
---
 drivers/bus/vmbus/freebsd/vmbus_uio.c | 30 +++++++++++++++++++++++++++
 drivers/bus/vmbus/linux/vmbus_uio.c   | 12 +++++++++++
 drivers/bus/vmbus/private.h           |  1 +
 drivers/bus/vmbus/rte_bus_vmbus.h     | 10 +++++++++
 drivers/bus/vmbus/version.map         |  1 +
 drivers/bus/vmbus/vmbus_channel.c     |  5 +++++
 6 files changed, 59 insertions(+)

diff --git a/drivers/bus/vmbus/freebsd/vmbus_uio.c b/drivers/bus/vmbus/freebsd/vmbus_uio.c
index 6b43b4349f..7e4e9723cb 100644
--- a/drivers/bus/vmbus/freebsd/vmbus_uio.c
+++ b/drivers/bus/vmbus/freebsd/vmbus_uio.c
@@ -25,6 +25,9 @@
  */
 #define UH_SUBCHAN_MASK_SHIFT  8
 
+/* ioctl */
+#define HVIOOPENSUBCHAN     _IOW('h', 14, uint32_t)
+
 const char *driver_name = "hv_uio";
 
 /* Check map names with kernel names */
@@ -151,3 +154,30 @@ const char *get_devname_os(void)
 {
 	return "/dev/hv_uio";
 }
+
+int vmbus_uio_subchan_open(struct rte_vmbus_device *dev, uint32_t subchan)
+{
+	struct mapped_vmbus_resource *uio_res;
+	int fd, err = 0;
+
+	uio_res = vmbus_uio_find_resource(dev);
+	if (!uio_res) {
+		VMBUS_LOG(ERR, "cannot find uio resource");
+		return -EINVAL;
+	}
+
+	fd = open(uio_res->path, O_RDWR);
+	if (fd < 0) {
+		VMBUS_LOG(ERR, "Cannot open %s: %s",
+				uio_res->path, strerror(errno));
+		return -1;
+	}
+
+	if (ioctl(fd, HVIOOPENSUBCHAN, &subchan)) {
+		VMBUS_LOG(ERR, "open subchan ioctl failed %s: %s",
+				uio_res->path, strerror(errno));
+		err = -1;
+	}
+	close(fd);
+	return err;
+}
diff --git a/drivers/bus/vmbus/linux/vmbus_uio.c b/drivers/bus/vmbus/linux/vmbus_uio.c
index 669551a4d4..d88cc97b5b 100644
--- a/drivers/bus/vmbus/linux/vmbus_uio.c
+++ b/drivers/bus/vmbus/linux/vmbus_uio.c
@@ -215,3 +215,15 @@ const char *get_devname_os(void)
 {
 	return "/dev/uio";
 }
+
+/*
+ * This is a stub function and it should always succeed.
+ * The Linux UIO kernel driver opens the subchannels implicitly.
+ */
+int vmbus_uio_subchan_open(struct rte_vmbus_device *dev,
+			   uint32_t subchan)
+{
+	RTE_SET_USED(dev);
+	RTE_SET_USED(subchan);
+	return 0;
+}
diff --git a/drivers/bus/vmbus/private.h b/drivers/bus/vmbus/private.h
index 1bca147e12..ea0276a6c6 100644
--- a/drivers/bus/vmbus/private.h
+++ b/drivers/bus/vmbus/private.h
@@ -116,6 +116,7 @@ bool vmbus_uio_subchannels_supported(const struct rte_vmbus_device *dev,
 int vmbus_uio_get_subchan(struct vmbus_channel *primary,
 			  struct vmbus_channel **subchan);
 int vmbus_uio_map_rings(struct vmbus_channel *chan);
+int vmbus_uio_subchan_open(struct rte_vmbus_device *device, uint32_t subchan);
 
 void vmbus_br_setup(struct vmbus_br *br, void *buf, unsigned int blen);
 
diff --git a/drivers/bus/vmbus/rte_bus_vmbus.h b/drivers/bus/vmbus/rte_bus_vmbus.h
index a24bad831d..c8cb4bc98c 100644
--- a/drivers/bus/vmbus/rte_bus_vmbus.h
+++ b/drivers/bus/vmbus/rte_bus_vmbus.h
@@ -404,6 +404,16 @@ void rte_vmbus_chan_dump(FILE *f, const struct vmbus_channel *chan);
  */
 void rte_vmbus_unregister(struct rte_vmbus_driver *driver);
 
+/**
+ * Perform IOCTL to VMBUS device
+ *
+ * @param device
+ *	A pointer to a rte_vmbus_device structure
+ * @param subchan
+ *	Count of subchannels to open
+ */
+int rte_vmbus_ioctl(struct rte_vmbus_device *device, uint32_t subchan);
+
 /** Helper for VMBUS device registration from driver instance */
 #define RTE_PMD_REGISTER_VMBUS(nm, vmbus_drv)		\
 	RTE_INIT(vmbusinitfn_ ##nm)			\
diff --git a/drivers/bus/vmbus/version.map b/drivers/bus/vmbus/version.map
index 3cadec7fae..3509d4fc14 100644
--- a/drivers/bus/vmbus/version.map
+++ b/drivers/bus/vmbus/version.map
@@ -23,6 +23,7 @@ DPDK_22 {
 	rte_vmbus_subchan_open;
 	rte_vmbus_unmap_device;
 	rte_vmbus_unregister;
+	rte_vmbus_ioctl;
 
 	local: *;
 };
diff --git a/drivers/bus/vmbus/vmbus_channel.c b/drivers/bus/vmbus/vmbus_channel.c
index 119b9b367e..9a8f6e3eef 100644
--- a/drivers/bus/vmbus/vmbus_channel.c
+++ b/drivers/bus/vmbus/vmbus_channel.c
@@ -365,6 +365,11 @@ int rte_vmbus_max_channels(const struct rte_vmbus_device *device)
 		return 1;
 }
 
+int rte_vmbus_ioctl(struct rte_vmbus_device *device, uint32_t subchan)
+{
+	return vmbus_uio_subchan_open(device, subchan);
+}
+
 /* Setup secondary channel */
 int rte_vmbus_subchan_open(struct vmbus_channel *primary,
 			   struct vmbus_channel **new_chan)
-- 
2.30.2


  parent reply	other threads:[~2022-04-19  9:34 UTC|newest]

Thread overview: 84+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-27 13:42 [dpdk-dev] [PATCH 00/11] add FreeBSD support to VMBUS & NetVSC PMDs Srikanth Kaka
2021-09-27 13:42 ` [dpdk-dev] [PATCH 01/11] bus/vmbus: stub for FreeBSD support Srikanth Kaka
2021-11-06 20:44   ` Long Li
2021-09-27 13:42 ` [dpdk-dev] [PATCH 02/11] bus/vmbus: scan and get the network device Srikanth Kaka
2021-10-08 11:39   ` [dpdk-dev] [PATCH v2 " Srikanth Kaka
2021-09-27 13:42 ` [dpdk-dev] [PATCH 03/11] bus/vmbus: handle mapping of device resources Srikanth Kaka
2021-09-27 13:42 ` [dpdk-dev] [PATCH 04/11] bus/vmbus: get device resource values using sysctl Srikanth Kaka
2021-09-27 13:42 ` [dpdk-dev] [PATCH 05/11] bus/vmbus: open subchannels Srikanth Kaka
2021-09-30 23:17   ` Long Li
2021-10-08 11:41   ` [dpdk-dev] [PATCH v2 " Srikanth Kaka
2021-11-06 20:49     ` Long Li
2022-02-08 16:35       ` Thomas Monjalon
2021-09-27 13:42 ` [dpdk-dev] [PATCH 06/11] net/netvsc: request HV_UIO to open sub-channels Srikanth Kaka
2021-09-30 23:19   ` Long Li
2021-10-01  5:31     ` Srikanth K
2021-09-27 13:42 ` [dpdk-dev] [PATCH 07/11] bus/vmbus: map the subchannel resources Srikanth Kaka
2021-09-27 13:42 ` [dpdk-dev] [PATCH 08/11] net/netvsc: moving event monitoring support Srikanth Kaka
2021-11-06 20:51   ` Long Li
2021-09-27 13:42 ` [dpdk-dev] [PATCH 09/11] net/netvsc: moving hotplug retry to OS dir Srikanth Kaka
2021-11-06 20:54   ` Long Li
2021-09-27 13:42 ` [dpdk-dev] [PATCH 10/11] bus/vmbus: add meson support for FreeBSD OS Srikanth Kaka
2021-11-06 20:54   ` Long Li
2021-09-27 13:42 ` [dpdk-dev] [PATCH 11/11] net/netvsc: add meson support for FreeBSD Srikanth Kaka
2021-10-08 11:42   ` [dpdk-dev] [PATCH v2 " Srikanth Kaka
2021-11-06 20:50     ` Long Li
2021-09-30 23:25 ` [dpdk-dev] [PATCH 00/11] add FreeBSD support to VMBUS & NetVSC PMDs Long Li
2022-02-17 16:05 ` [PATCH v3 00/15] " Srikanth Kaka
2022-02-17 16:05   ` [PATCH v3 01/15] bus/vmbus: scan and get the network device Srikanth Kaka
2022-02-17 16:29     ` Stephen Hemminger
2022-02-17 16:06   ` [PATCH v3 02/15] bus/vmbus: handle mapping of device resources Srikanth Kaka
2022-02-17 16:06   ` [PATCH v3 03/15] bus/vmbus: get device resource values using sysctl Srikanth Kaka
2022-02-17 16:06   ` [PATCH v3 04/15] bus/vmbus: add resource by index Srikanth Kaka
2022-02-17 16:06   ` [PATCH v3 05/15] net/netvsc: make event monitor OS dependent Srikanth Kaka
2022-02-17 16:06   ` [PATCH v3 06/15] bus/vmbus: add ring mapping APIs Srikanth Kaka
2022-02-17 16:06   ` [PATCH v3 07/15] bus/vmbus: add stub for subchannel support API Srikanth Kaka
2022-02-17 16:06   ` [PATCH v3 08/15] bus/vmbus: open subchannels Srikanth Kaka
2022-02-17 16:06   ` [PATCH v3 09/15] net/netvsc: make IOCTL call to " Srikanth Kaka
2022-02-17 16:06   ` [PATCH v3 10/15] bus/vmbus: get subchannel info Srikanth Kaka
2022-02-17 16:06   ` [PATCH v3 11/15] net/netvsc: moving hotplug retry to OS dir Srikanth Kaka
2022-02-17 16:06   ` [PATCH v3 12/15] bus/vmbus: add meson support for FreeBSD Srikanth Kaka
2022-02-17 16:06   ` [PATCH v3 13/15] net/netvsc: " Srikanth Kaka
2022-02-17 16:06   ` [PATCH v3 14/15] bus/vmbus: add APIs to mask/unmask IRQs Srikanth Kaka
2022-02-17 16:06   ` [PATCH v3 15/15] bus/vmbus: update MAINTAINERS and docs Srikanth Kaka
2022-04-18  4:29     ` [PATCH v4 00/14] add FreeBSD support to VMBUS & NetVSC PMDs Srikanth Kaka
2022-04-18  4:29       ` [PATCH v4 01/14] bus/vmbus: move independent code from Linux Srikanth Kaka
2022-04-19 14:49         ` Stephen Hemminger
2022-04-19 14:52           ` Srikanth K
2022-04-18  4:29       ` [PATCH v4 02/14] bus/vmbus: move independent bus functions Srikanth Kaka
2022-04-18  4:29       ` [PATCH v4 03/14] bus/vmbus: move OS independent UIO functions Srikanth Kaka
2022-04-18  4:29       ` [PATCH v4 04/14] bus/vmbus: scan and get the network device on FreeBSD Srikanth Kaka
2022-04-18  4:29       ` [PATCH v4 05/14] bus/vmbus: handle mapping of device resources Srikanth Kaka
2022-04-18  4:29       ` [PATCH v4 06/14] bus/vmbus: get device resource values using sysctl Srikanth Kaka
2022-04-18  4:29       ` [PATCH v4 07/14] net/netvsc: make event monitor OS dependent Srikanth Kaka
2022-04-18  4:29       ` [PATCH v4 08/14] bus/vmbus: add sub-channel mapping support Srikanth Kaka
2022-04-18  4:29       ` Srikanth Kaka [this message]
2022-04-19 15:00         ` [PATCH v4 09/14] bus/vmbus: open subchannels Stephen Hemminger
2022-04-18  4:29       ` [PATCH v4 10/14] net/netvsc: make IOCTL call to " Srikanth Kaka
2022-04-18  4:29       ` [PATCH v4 11/14] bus/vmbus: get subchannel info Srikanth Kaka
2022-04-19 14:51         ` Stephen Hemminger
2022-04-18  4:29       ` [PATCH v4 12/14] net/netvsc: moving hotplug retry to OS dir Srikanth Kaka
2022-04-18  4:29       ` [PATCH v4 13/14] bus/vmbus: add meson support for FreeBSD Srikanth Kaka
2022-04-18  4:29       ` [PATCH v4 14/14] bus/vmbus: update MAINTAINERS and docs Srikanth Kaka
2022-04-23  4:28       ` [PATCH v5 00/14] add FreeBSD support to VMBUS & NetVSC PMDs Srikanth Kaka
2022-04-23  4:28         ` [PATCH v5 01/14] bus/vmbus: move independent code from Linux Srikanth Kaka
2022-04-23  4:28         ` [PATCH v5 02/14] bus/vmbus: move independent bus functions Srikanth Kaka
2022-04-23  4:28         ` [PATCH v5 03/14] bus/vmbus: move OS independent UIO functions Srikanth Kaka
2022-04-23  4:28         ` [PATCH v5 04/14] bus/vmbus: scan and get the network device on FreeBSD Srikanth Kaka
2022-04-23  4:28         ` [PATCH v5 05/14] bus/vmbus: handle mapping of device resources Srikanth Kaka
2022-04-23  4:28         ` [PATCH v5 06/14] bus/vmbus: get device resource values using sysctl Srikanth Kaka
2022-04-23  4:28         ` [PATCH v5 07/14] net/netvsc: make event monitor OS dependent Srikanth Kaka
2022-04-23  4:28         ` [PATCH v5 08/14] bus/vmbus: add sub-channel mapping support Srikanth Kaka
2022-04-23  4:28         ` [PATCH v5 09/14] bus/vmbus: open subchannels Srikanth Kaka
2023-08-10 15:41           ` Stephen Hemminger
2022-04-23  4:28         ` [PATCH v5 10/14] net/netvsc: make IOCTL call to " Srikanth Kaka
2022-04-23  4:28         ` [PATCH v5 11/14] bus/vmbus: get subchannel info Srikanth Kaka
2022-04-23  4:28         ` [PATCH v5 12/14] net/netvsc: moving hotplug retry to OS dir Srikanth Kaka
2022-04-23  4:28         ` [PATCH v5 13/14] bus/vmbus: add meson support for FreeBSD Srikanth Kaka
2022-04-23  4:28         ` [PATCH v5 14/14] bus/vmbus: update MAINTAINERS and docs Srikanth Kaka
2023-08-10 15:44           ` Stephen Hemminger
2022-05-18  8:18         ` [PATCH v5 00/14] add FreeBSD support to VMBUS & NetVSC PMDs Thomas Monjalon
2022-10-06 14:58           ` Thomas Monjalon
2023-07-04  0:07             ` Stephen Hemminger
2022-04-14  8:54   ` [PATCH v3 00/15] " Thomas Monjalon
2022-04-14  9:01     ` Srikanth K

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