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| author | Logan Gunthorpe <logang@deltatee.com> | 2017-03-06 18:30:54 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-03-06 18:33:34 -0600 |
| commit | 080b47def5e5e28b2509c5bb92160d1df730f27b (patch) | |
| tree | 72a20cad07f6cad6ddd437af46616fd53e0f78c5 /drivers/pci/Kconfig | |
| parent | c1ae3cfa0e89fa1a7ecc4c99031f5e9ae99d9201 (diff) | |
| download | linux-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/Kconfig | 1 |
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" |