From 080b47def5e5e28b2509c5bb92160d1df730f27b Mon Sep 17 00:00:00 2001 From: Logan Gunthorpe Date: Mon, 6 Mar 2017 18:30:54 -0600 Subject: 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 : don't invert error codes] [Christophe JAILLET : fix switchtec_dev_open() error handling] Tested-by: Krishna Dhulipala Signed-off-by: Logan Gunthorpe Signed-off-by: Stephen Bates Signed-off-by: Bjorn Helgaas Reviewed-by: Wei Zhang Reviewed-by: Jens Axboe Reviewed-by: Greg Kroah-Hartman --- drivers/pci/Makefile | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/pci/Makefile') diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile index 8db5079f09a7..15b46dd5074b 100644 --- a/drivers/pci/Makefile +++ b/drivers/pci/Makefile @@ -68,3 +68,4 @@ ccflags-$(CONFIG_PCI_DEBUG) := -DDEBUG # PCI host controller drivers obj-y += host/ +obj-y += switch/ -- cgit v1.2.3