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authorLogan Gunthorpe <logang@deltatee.com>2017-03-06 18:30:54 -0600
committerBjorn Helgaas <bhelgaas@google.com>2017-03-06 18:33:34 -0600
commit080b47def5e5e28b2509c5bb92160d1df730f27b (patch)
tree72a20cad07f6cad6ddd437af46616fd53e0f78c5 /drivers/pci/Kconfig
parentc1ae3cfa0e89fa1a7ecc4c99031f5e9ae99d9201 (diff)
downloadlinux-080b47def5e5e28b2509c5bb92160d1df730f27b.tar.bz2
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>
Diffstat (limited to 'drivers/pci/Kconfig')
-rw-r--r--drivers/pci/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index df141420c902..c0bb4cbd1edb 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -134,3 +134,4 @@ config PCI_HYPERV
source "drivers/pci/hotplug/Kconfig"
source "drivers/pci/dwc/Kconfig"
source "drivers/pci/host/Kconfig"
+source "drivers/pci/switch/Kconfig"