dpdk: disable i40evf in favor of iavf patch

Fix an issue where multiple VPP instances with DPDK starting at the
same time would not initialize VFs properly. This is done by using the
iavf PMD (where the issue can't be reproduced) instead of the i40evf
PMD.

Type: fix
Ticket: VPP-1943
Signed-off-by: Juraj Linkeš <juraj.linkes@pantheon.tech>
Change-Id: Idcc48088c7d66a76da2b4675c02c7c115706c8b3

1 files changed, 232 insertions, 0 deletions

diff --git a/build/external/patches/dpdk_20.08/0001-net-iavf-deprecate-i40evf-pmd.patch b/build/external/patches/dpdk_20.08/0001-net-iavf-deprecate-i40evf-pmd.patch
new file mode 100644
index 00000000000..aa660e70132
--- /dev/null
+++ b/build/external/patches/dpdk_20.08/0001-net-iavf-deprecate-i40evf-pmd.patch
@@ -0,0 +1,232 @@
+From bd048f56bc4b85fed31f34db676f1ad67c86bd16 Mon Sep 17 00:00:00 2001
+From: Robin Zhang <robinx.zhang@intel.com>
+Date: Mon, 19 Apr 2021 03:05:39 +0000
+Subject: [PATCH] net/iavf: deprecate i40evf pmd
+
+The i40evf PMD will be deprecated, iavf will be the only VF driver for
+Intel 700 serial (i40e) NIC family. To reach this, there will be 2 steps:
+
+Step 1: iavf will be the default VF driver, while i40evf still can be
+selected by devarg: "driver=i40evf".
+This is covered by this patch, which include:
+1) add all 700 serial NIC VF device ID into iavf PMD
+2) skip probe if devargs contain "driver=i40evf" in iavf
+3) continue probe if devargs contain "driver=i40evf" in i40evf
+
+Step 2: i40evf and related devarg are removed, this will happen at DPDK
+21.11
+
+Between step 1 and step 2, no new feature will be added into i40evf except
+bug fix.
+
+Signed-off-by: Robin Zhang <robinx.zhang@intel.com>
+Acked-by: Qi Zhang <qi.z.zhang@intel.com>
+Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>
+Acked-by: Beilei Xing <beilei.xing@intel.com>
+---
+ doc/guides/nics/intel_vf.rst         |  6 +++
+ doc/guides/rel_notes/deprecation.rst |  8 ++++
+ drivers/common/iavf/iavf_devids.h    |  2 +
+ drivers/net/i40e/i40e_ethdev_vf.c    | 45 ++++++++++++++++++++++
+ drivers/net/iavf/iavf_ethdev.c       | 57 +++++++++++++++++++++++++++-
+ 5 files changed, 116 insertions(+), 2 deletions(-)
+
+diff --git a/doc/guides/nics/intel_vf.rst b/doc/guides/nics/intel_vf.rst
+index ade5152595..b95200698d 100644
+--- a/doc/guides/nics/intel_vf.rst
++++ b/doc/guides/nics/intel_vf.rst
+@@ -88,6 +88,12 @@ For more detail on SR-IOV, please refer to the following documents:
+     assignment in hypervisor. Take qemu for example, the device assignment should carry the IAVF device id (0x1889) like
+     ``-device vfio-pci,x-pci-device-id=0x1889,host=03:0a.0``.
+ 
++    Starting from DPDK 21.05, the default VF driver for Intel® 700 Series Ethernet Controller will be IAVF. No new feature
++    will be added into i40evf except bug fix until it's removed in DPDK 21.11. Between DPDK 21.05 and 21.11, by using the
++    ``devargs`` option ``driver=i40evf``, i40evf PMD still can be used on Intel® 700 Series Ethernet Controller, for example::
++
++    -a 81:02.0,driver=i40evf
++
+ The PCIE host-interface of Intel Ethernet Switch FM10000 Series VF infrastructure
+ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+ 
+diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
+index c2770feeae..25caf4e52d 100644
+--- a/doc/guides/rel_notes/deprecation.rst
++++ b/doc/guides/rel_notes/deprecation.rst
+@@ -335,3 +335,11 @@ Deprecation Notices
+   ``make``. Given environments are too much variables for such a simple script,
+   it will be removed in DPDK 20.11.
+   Some useful parts may be converted into specific scripts.
++
++* i40e: As there are both i40evf and iavf pmd, the functions of them are
++  duplicated. And now more and more advanced features are developed on iavf.
++  To keep consistent with kernel driver's name
++  (https://patchwork.ozlabs.org/patch/970154/), i40evf is no need to maintain.
++  Starting from 21.05, the default VF driver of i40e will be iavf, but i40evf
++  can still be used if users specify the devarg "driver=i40evf". I40evf will
++  be deleted in DPDK 21.11.
+diff --git a/drivers/common/iavf/iavf_devids.h b/drivers/common/iavf/iavf_devids.h
+index 2e63aac289..1c3acb586d 100644
+--- a/drivers/common/iavf/iavf_devids.h
++++ b/drivers/common/iavf/iavf_devids.h
+@@ -13,5 +13,7 @@
+ #define IAVF_DEV_ID_VF_HV		0x1571
+ #define IAVF_DEV_ID_ADAPTIVE_VF		0x1889
+ #define IAVF_DEV_ID_X722_VF		0x37CD
++#define IAVF_DEV_ID_X722_A0_VF          0x374D
++
+ 
+ #endif /* _IAVF_DEVIDS_H_ */
+diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
+index 69cab8e739..3d61c092d8 100644
+--- a/drivers/net/i40e/i40e_ethdev_vf.c
++++ b/drivers/net/i40e/i40e_ethdev_vf.c
+@@ -1592,9 +1592,53 @@ i40evf_dev_uninit(struct rte_eth_dev *eth_dev)
+ 	return 0;
+ }
+ 
++static int
++i40evf_check_driver_handler(__rte_unused const char *key,
++			    const char *value, __rte_unused void *opaque)
++{
++	if (strcmp(value, "i40evf"))
++		return -1;
++
++	return 0;
++}
++
++static int
++i40evf_driver_selected(struct rte_devargs *devargs)
++{
++	struct rte_kvargs *kvlist;
++	const char *key = "driver";
++	int ret = 0;
++
++	if (devargs == NULL)
++		return 0;
++
++	kvlist = rte_kvargs_parse(devargs->args, NULL);
++	if (kvlist == NULL)
++		return 0;
++
++	if (!rte_kvargs_count(kvlist, key))
++		goto exit;
++
++	/* i40evf driver selected when there's a key-value pair:
++	 * driver=i40evf
++	 */
++	if (rte_kvargs_process(kvlist, key,
++			       i40evf_check_driver_handler, NULL) < 0)
++		goto exit;
++
++	ret = 1;
++
++exit:
++	rte_kvargs_free(kvlist);
++	return ret;
++}
++
+ static int eth_i40evf_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
+ 	struct rte_pci_device *pci_dev)
+ {
++	if (!i40evf_driver_selected(pci_dev->device.devargs))
++		return 1;
++
+ 	return rte_eth_dev_pci_generic_probe(pci_dev,
+ 		sizeof(struct i40e_adapter), i40evf_dev_init);
+ }
+@@ -1617,6 +1661,7 @@ static struct rte_pci_driver rte_i40evf_pmd = {
+ RTE_PMD_REGISTER_PCI(net_i40e_vf, rte_i40evf_pmd);
+ RTE_PMD_REGISTER_PCI_TABLE(net_i40e_vf, pci_id_i40evf_map);
+ RTE_PMD_REGISTER_KMOD_DEP(net_i40e_vf, "* igb_uio | vfio-pci");
++RTE_PMD_REGISTER_PARAM_STRING(net_i40e_vf, "driver=i40evf");
+ 
+ static int
+ i40evf_dev_configure(struct rte_eth_dev *dev)
+diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c
+index c3aa4cd725..f22c3ccdb9 100644
+--- a/drivers/net/iavf/iavf_ethdev.c
++++ b/drivers/net/iavf/iavf_ethdev.c
+@@ -76,6 +76,10 @@ static int iavf_dev_filter_ctrl(struct rte_eth_dev *dev,
+ 
+ static const struct rte_pci_id pci_id_iavf_map[] = {
+ 	{ RTE_PCI_DEVICE(IAVF_INTEL_VENDOR_ID, IAVF_DEV_ID_ADAPTIVE_VF) },
++	{ RTE_PCI_DEVICE(IAVF_INTEL_VENDOR_ID, IAVF_DEV_ID_VF) },
++	{ RTE_PCI_DEVICE(IAVF_INTEL_VENDOR_ID, IAVF_DEV_ID_VF_HV) },
++	{ RTE_PCI_DEVICE(IAVF_INTEL_VENDOR_ID, IAVF_DEV_ID_X722_VF) },
++	{ RTE_PCI_DEVICE(IAVF_INTEL_VENDOR_ID, IAVF_DEV_ID_X722_A0_VF) },
+ 	{ .vendor_id = 0, /* sentinel */ },
+ };
+ 
+@@ -1516,10 +1520,59 @@ iavf_dcf_cap_selected(struct rte_devargs *devargs)
+ 	return ret;
+ }
+ 
++static int
++iavf_drv_i40evf_check_handler(__rte_unused const char *key,
++			      const char *value, __rte_unused void *opaque)
++{
++	if (strcmp(value, "i40evf"))
++		return -1;
++
++	return 0;
++}
++
++static int
++iavf_drv_i40evf_selected(struct rte_devargs *devargs, uint16_t device_id)
++{
++	struct rte_kvargs *kvlist;
++	const char *key = "driver";
++	int ret = 0;
++
++	if (device_id != IAVF_DEV_ID_VF &&
++	    device_id != IAVF_DEV_ID_VF_HV &&
++	    device_id != IAVF_DEV_ID_X722_VF &&
++	    device_id != IAVF_DEV_ID_X722_A0_VF)
++		return 0;
++
++	if (devargs == NULL)
++		return 0;
++
++	kvlist = rte_kvargs_parse(devargs->args, NULL);
++	if (kvlist == NULL)
++		return 0;
++
++	if (!rte_kvargs_count(kvlist, key))
++		goto exit;
++
++	/* i40evf driver selected when there's a key-value pair:
++	 * driver=i40evf
++	 */
++	if (rte_kvargs_process(kvlist, key,
++			       iavf_drv_i40evf_check_handler, NULL) < 0)
++		goto exit;
++
++	ret = 1;
++
++exit:
++	rte_kvargs_free(kvlist);
++	return ret;
++}
++
+ static int eth_iavf_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
+ 			     struct rte_pci_device *pci_dev)
+ {
+-	if (iavf_dcf_cap_selected(pci_dev->device.devargs))
++	if (iavf_dcf_cap_selected(pci_dev->device.devargs) ||
++	    iavf_drv_i40evf_selected(pci_dev->device.devargs,
++				     pci_dev->id.device_id))
+ 		return 1;
+ 
+ 	return rte_eth_dev_pci_generic_probe(pci_dev,
+@@ -1542,7 +1595,7 @@ static struct rte_pci_driver rte_iavf_pmd = {
+ RTE_PMD_REGISTER_PCI(net_iavf, rte_iavf_pmd);
+ RTE_PMD_REGISTER_PCI_TABLE(net_iavf, pci_id_iavf_map);
+ RTE_PMD_REGISTER_KMOD_DEP(net_iavf, "* igb_uio | vfio-pci");
+-RTE_PMD_REGISTER_PARAM_STRING(net_iavf, "cap=dcf");
++RTE_PMD_REGISTER_PARAM_STRING(net_iavf, "cap=dcf driver=i40evf");
+ RTE_LOG_REGISTER(iavf_logtype_init, pmd.net.iavf.init, NOTICE);
+ RTE_LOG_REGISTER(iavf_logtype_driver, pmd.net.iavf.driver, NOTICE);
+ #ifdef RTE_LIBRTE_IAVF_DEBUG_RX
+-- 
+2.20.1
+