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Commit 4ab0c6a8 authored by Sathya Perla's avatar Sathya Perla Committed by David S. Miller
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bnxt_en: add support to enable VF-representors 



This patch is a part of a patch-set that introduces support for
VF-reps in the bnxt_en driver. The driver registers eswitch mode
get/set methods with the devlink interface that allow a user to
enable SRIOV switchdev mode. When enabled, the driver registers
a VF-rep netdev object for each VF with the stack. This can
essentially bring the VFs unders the management perview of the
hypervisor and applications such as OVS.

The next patch in the series, adds the RX/TX routines and a slim
netdev implementation for the VF-reps.

Signed-off-by: default avatarSathya Perla <sathya.perla@broadcom.com>
Signed-off-by: default avatarMichael Chan <michael.chan@broadcom.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 70098a47

drivers/net/ethernet/broadcom/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -193,6 +193,7 @@ config SYSTEMPORT 
config BNXT

	tristate "Broadcom NetXtreme-C/E support"

	depends on PCI

	depends on MAY_USE_DEVLINK

	select FW_LOADER

	select LIBCRC32C

	---help---

drivers/net/ethernet/broadcom/bnxt/Makefile

+1 −1
Original line number Diff line number Diff line 
obj-$(CONFIG_BNXT) += bnxt_en.o



bnxt_en-y := bnxt.o bnxt_sriov.o bnxt_ethtool.o bnxt_dcb.o bnxt_ulp.o bnxt_xdp.o
 
bnxt_en-y := bnxt.o bnxt_sriov.o bnxt_ethtool.o bnxt_dcb.o bnxt_ulp.o bnxt_xdp.o bnxt_vfr.o

drivers/net/ethernet/broadcom/bnxt/bnxt.c

+8 −1
Original line number Diff line number Diff line
@@ -57,6 +57,7 @@ 
#include "bnxt_ethtool.h"

#include "bnxt_dcb.h"

#include "bnxt_xdp.h"

#include "bnxt_vfr.h"



#define BNXT_TX_TIMEOUT		(5 * HZ)
@@ -7539,8 +7540,10 @@ static void bnxt_remove_one(struct pci_dev *pdev) 
	struct net_device *dev = pci_get_drvdata(pdev);

	struct bnxt *bp = netdev_priv(dev);



	if (BNXT_PF(bp))

	if (BNXT_PF(bp)) {

		bnxt_sriov_disable(bp);

		bnxt_dl_unregister(bp);

	}



	pci_disable_pcie_error_reporting(pdev);

	unregister_netdev(dev);
@@ -7843,6 +7846,7 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 


#ifdef CONFIG_BNXT_SRIOV

	init_waitqueue_head(&bp->sriov_cfg_wait);

	mutex_init(&bp->sriov_lock);

#endif

	bp->gro_func = bnxt_gro_func_5730x;

	if (BNXT_CHIP_P4_PLUS(bp))
@@ -7934,6 +7938,9 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 
	if (rc)

		goto init_err_clr_int;



	if (BNXT_PF(bp))

		bnxt_dl_register(bp);



	netdev_info(dev, "%s found at mem %lx, node addr %pM\n",

		    board_info[ent->driver_data].name,

		    (long)pci_resource_start(pdev, 0), dev->dev_addr);

drivers/net/ethernet/broadcom/bnxt/bnxt.h

+32 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#define DRV_VER_UPD	0



#include <linux/interrupt.h>

#include <net/devlink.h>



struct tx_bd {

	__le32 tx_bd_len_flags_type;
@@ -618,6 +619,8 @@ struct bnxt_tpa_info { 


#define BNXT_TPA_OUTER_L3_OFF(hdr_info)	\

	((hdr_info) & 0x1ff)



	u16			cfa_code; /* cfa_code in TPA start compl */

};



struct bnxt_rx_ring_info {
@@ -928,6 +931,23 @@ struct bnxt_test_info { 
#define BNXT_CAG_REG_LEGACY_INT_STATUS	0x4014

#define BNXT_CAG_REG_BASE		0x300000



struct bnxt_vf_rep_stats {

	u64			packets;

	u64			bytes;

	u64			dropped;

};



struct bnxt_vf_rep {

	struct bnxt			*bp;

	struct net_device		*dev;

	u16				vf_idx;

	u16				tx_cfa_action;

	u16				rx_cfa_code;



	struct bnxt_vf_rep_stats	rx_stats;

	struct bnxt_vf_rep_stats	tx_stats;

};



struct bnxt {

	void __iomem		*bar0;

	void __iomem		*bar1;
@@ -1208,6 +1228,12 @@ struct bnxt { 
	wait_queue_head_t	sriov_cfg_wait;

	bool			sriov_cfg;

#define BNXT_SRIOV_CFG_WAIT_TMO	msecs_to_jiffies(10000)



	/* lock to protect VF-rep creation/cleanup via

	 * multiple paths such as ->sriov_configure() and

	 * devlink ->eswitch_mode_set()

	 */

	struct mutex		sriov_lock;

#endif



#define BNXT_NTP_FLTR_MAX_FLTR	4096
@@ -1234,6 +1260,12 @@ struct bnxt { 
	struct bnxt_led_info	leds[BNXT_MAX_LED];



	struct bpf_prog		*xdp_prog;



	/* devlink interface and vf-rep structs */

	struct devlink		*dl;

	enum devlink_eswitch_mode eswitch_mode;

	struct bnxt_vf_rep	**vf_reps; /* array of vf-rep ptrs */

	u16			*cfa_code_map; /* cfa_code -> vf_idx map */

};



#define BNXT_RX_STATS_OFFSET(counter)			\

drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c

+6 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#include "bnxt.h"

#include "bnxt_ulp.h"

#include "bnxt_sriov.h"

#include "bnxt_vfr.h"

#include "bnxt_ethtool.h"



#ifdef CONFIG_BNXT_SRIOV
@@ -587,6 +588,10 @@ void bnxt_sriov_disable(struct bnxt *bp) 
	if (!num_vfs)

		return;



	/* synchronize VF and VF-rep create and destroy */

	mutex_lock(&bp->sriov_lock);

	bnxt_vf_reps_destroy(bp);



	if (pci_vfs_assigned(bp->pdev)) {

		bnxt_hwrm_fwd_async_event_cmpl(

			bp, NULL, ASYNC_EVENT_CMPL_EVENT_ID_PF_DRVR_UNLOAD);
@@ -597,6 +602,7 @@ void bnxt_sriov_disable(struct bnxt *bp) 
		/* Free the HW resources reserved for various VF's */

		bnxt_hwrm_func_vf_resource_free(bp, num_vfs);

	}

	mutex_unlock(&bp->sriov_lock);



	bnxt_free_vf_resources(bp);