patches for DPDK stable branches
 help / color / mirror / Atom feed
From: Thomas Monjalon <thomas@monjalon.net>
To: dev@dpdk.org
Cc: dmitry.kozliuk@gmail.com, stable@dpdk.org,
	Tal Shnaiderman <talshn@mellanox.com>,
	Ranjit Menon <ranjit.menon@intel.com>,
	Narcisa Vasile <navasile@linux.microsoft.com>,
	Pallavi Kadam <pallavi.kadam@intel.com>,
	John Alexander <john.alexander@datapath.co.uk>
Subject: [dpdk-stable] [PATCH v2] bus/pci: fix Windows kernel driver categories
Date: Thu, 18 Mar 2021 11:48:07 +0100
Message-ID: <20210318104807.1882334-1-thomas@monjalon.net> (raw)
In-Reply-To: <20210316231153.724029-1-thomas@monjalon.net>

In Windows probing, the value RTE_PCI_KDRV_NONE was used
instead of RTE_PCI_KDRV_UNKNOWN.
This value covers the mlx case where the kernel driver is in place,
offering a bifurcated mode to the userspace driver.
When the kernel driver is listed as unknown,
there is no special treatment in DPDK probing, contrary to UIO modes.

The value RTE_PCI_KDRV_NIC_UIO (FreeBSD) was re-used
instead of having a new RTE_PCI_KDRV_NET_UIO for Windows NetUIO.
While adding the new value RTE_PCI_KDRV_NET_UIO
(at the end for ABI compatibility),
the enum of kernel driver categories is annotated.

Fixes: b762221ac24f ("bus/pci: support Windows with bifurcated drivers")
Fixes: c76ec01b4591 ("bus/pci: support netuio on Windows")
Cc: stable@dpdk.org

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Acked-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
---
v2: improve comments and commit message
---
 drivers/bus/pci/rte_bus_pci.h | 13 +++++++------
 drivers/bus/pci/windows/pci.c | 14 +++++++-------
 2 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/drivers/bus/pci/rte_bus_pci.h b/drivers/bus/pci/rte_bus_pci.h
index fdda046515..876abddefb 100644
--- a/drivers/bus/pci/rte_bus_pci.h
+++ b/drivers/bus/pci/rte_bus_pci.h
@@ -52,12 +52,13 @@ TAILQ_HEAD(rte_pci_driver_list, rte_pci_driver);
 struct rte_devargs;
 
 enum rte_pci_kernel_driver {
-	RTE_PCI_KDRV_UNKNOWN = 0,
-	RTE_PCI_KDRV_IGB_UIO,
-	RTE_PCI_KDRV_VFIO,
-	RTE_PCI_KDRV_UIO_GENERIC,
-	RTE_PCI_KDRV_NIC_UIO,
-	RTE_PCI_KDRV_NONE,
+	RTE_PCI_KDRV_UNKNOWN = 0,  /* may be misc UIO or bifurcated driver */
+	RTE_PCI_KDRV_IGB_UIO,      /* igb_uio for Linux */
+	RTE_PCI_KDRV_VFIO,         /* VFIO for Linux */
+	RTE_PCI_KDRV_UIO_GENERIC,  /* uio_pci_generic for Linux */
+	RTE_PCI_KDRV_NIC_UIO,      /* nic_uio for FreeBSD */
+	RTE_PCI_KDRV_NONE,         /* no attached driver */
+	RTE_PCI_KDRV_NET_UIO,      /* NetUIO for Windows */
 };
 
 /**
diff --git a/drivers/bus/pci/windows/pci.c b/drivers/bus/pci/windows/pci.c
index 8f906097f4..d39a7748b8 100644
--- a/drivers/bus/pci/windows/pci.c
+++ b/drivers/bus/pci/windows/pci.c
@@ -38,7 +38,7 @@ rte_pci_map_device(struct rte_pci_device *dev)
 	 * Devices that are bound to netuio are mapped at
 	 * the bus probing stage.
 	 */
-	if (dev->kdrv == RTE_PCI_KDRV_NIC_UIO)
+	if (dev->kdrv == RTE_PCI_KDRV_NET_UIO)
 		return 0;
 	else
 		return -1;
@@ -207,14 +207,14 @@ get_device_resource_info(HDEVINFO dev_info,
 	int ret;
 
 	switch (dev->kdrv) {
-	case RTE_PCI_KDRV_NONE:
-		/* mem_resource - Unneeded for RTE_PCI_KDRV_NONE */
+	case RTE_PCI_KDRV_UNKNOWN:
+		/* bifurcated driver case - mem_resource is unneeded */
 		dev->mem_resource[0].phys_addr = 0;
 		dev->mem_resource[0].len = 0;
 		dev->mem_resource[0].addr = NULL;
 		break;
-	case RTE_PCI_KDRV_NIC_UIO:
-		/* get device info from netuio kernel driver */
+	case RTE_PCI_KDRV_NET_UIO:
+		/* get device info from NetUIO kernel driver */
 		ret = get_netuio_device_info(dev_info, dev_info_data, dev);
 		if (ret != 0) {
 			RTE_LOG(DEBUG, EAL,
@@ -323,9 +323,9 @@ set_kernel_driver_type(PSP_DEVINFO_DATA device_info_data,
 {
 	/* set kernel driver type based on device class */
 	if (IsEqualGUID(&(device_info_data->ClassGuid), &GUID_DEVCLASS_NETUIO))
-		dev->kdrv = RTE_PCI_KDRV_NIC_UIO;
+		dev->kdrv = RTE_PCI_KDRV_NET_UIO;
 	else
-		dev->kdrv = RTE_PCI_KDRV_NONE;
+		dev->kdrv = RTE_PCI_KDRV_UNKNOWN;
 }
 
 static int
-- 
2.30.1


  parent reply	other threads:[~2021-03-18 10:48 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-16 23:11 [dpdk-stable] [PATCH] " Thomas Monjalon
2021-03-17 22:43 ` Dmitry Kozlyuk
2021-03-18  7:43   ` Thomas Monjalon
2021-03-17 23:17 ` Ranjit Menon
2021-03-18  7:49   ` Thomas Monjalon
2021-03-18 22:00     ` Ranjit Menon
2021-03-18  8:36 ` [dpdk-stable] [dpdk-dev] " Slava Ovsiienko
2021-03-18 10:45   ` Thomas Monjalon
2021-03-18 10:48 ` Thomas Monjalon [this message]
2021-03-18 12:00   ` [dpdk-stable] [PATCH v2] " Tal Shnaiderman
2021-03-18 22:07   ` Ranjit Menon
2021-03-19 15:24     ` [dpdk-stable] [dpdk-dev] " Thomas Monjalon

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210318104807.1882334-1-thomas@monjalon.net \
    --to=thomas@monjalon.net \
    --cc=dev@dpdk.org \
    --cc=dmitry.kozliuk@gmail.com \
    --cc=john.alexander@datapath.co.uk \
    --cc=navasile@linux.microsoft.com \
    --cc=pallavi.kadam@intel.com \
    --cc=ranjit.menon@intel.com \
    --cc=stable@dpdk.org \
    --cc=talshn@mellanox.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

patches for DPDK stable branches

This inbox may be cloned and mirrored by anyone:

	git clone --mirror https://inbox.dpdk.org/stable/0 stable/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 stable stable/ https://inbox.dpdk.org/stable \
		stable@dpdk.org
	public-inbox-index stable

Example config snippet for mirrors.
Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.stable


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git