linux_dsm_epyc7002/drivers/pci/switch/Kconfig

menu "PCI switch controller drivers"
	depends on PCI

config PCI_SW_SWITCHTEC
	tristate "MicroSemi Switchtec PCIe Switch Management Driver"
	help
	 Enables support for the management interface for the MicroSemi
	 Switchtec series of PCIe switches. Supports userspace access
	 to submit MRPC commands to the switch via /dev/switchtecX
	 devices. See <file:Documentation/switchtec.txt> for more
	 information.

endmenu
MicroSemi Switchtec management interface driver Microsemi's "Switchtec" line of PCI switch devices is already well supported by the kernel with standard PCI switch drivers. However, the Switchtec device advertises a special management endpoint with a separate PCI function address and class code. This endpoint enables some additional functionality which includes: * Packet and Byte Counters * Switch Firmware Upgrades * Event and Error logs * Querying port link status * Custom user firmware commands Add a switchtec kernel module which provides PCI driver that exposes a char device. The char device provides userspace access to this interface through read, write and (optionally) poll calls. A userspace tool and library which utilizes this interface is available at [1]. This tool takes inspiration (and borrows some code) from nvme-cli [2]. The tool is largely complete at this time but additional features may be added in the future. [1] https://github.com/sbates130272/switchtec-user [2] https://github.com/linux-nvme/nvme-cli [Dan Carpenter <dan.carpenter@oracle.com>: don't invert error codes] [Christophe JAILLET <christophe.jaillet@wanadoo.fr>: fix switchtec_dev_open() error handling] Tested-by: Krishna Dhulipala <krishnad@fb.com> Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Stephen Bates <stephen.bates@microsemi.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Wei Zhang <wzhang@fb.com> Reviewed-by: Jens Axboe <axboe@fb.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2017-03-07 07:30:54 +07:00			`menu "PCI switch controller drivers"`
			`depends on PCI`

			`config PCI_SW_SWITCHTEC`
			`tristate "MicroSemi Switchtec PCIe Switch Management Driver"`
			`help`
			`Enables support for the management interface for the MicroSemi`
			`Switchtec series of PCIe switches. Supports userspace access`
			`to submit MRPC commands to the switch via /dev/switchtecX`
			`devices. See <file:Documentation/switchtec.txt> for more`
			`information.`

			`endmenu`