diff options
| 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/switch/Kconfig | |
| parent | c1ae3cfa0e89fa1a7ecc4c99031f5e9ae99d9201 (diff) | |
| download | linux-080b47def5e5e28b2509c5bb92160d1df730f27b.tar.gz linux-080b47def5e5e28b2509c5bb92160d1df730f27b.tar.bz2 linux-080b47def5e5e28b2509c5bb92160d1df730f27b.zip | |
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/switch/Kconfig')
| -rw-r--r-- | drivers/pci/switch/Kconfig | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/pci/switch/Kconfig b/drivers/pci/switch/Kconfig new file mode 100644 index 000000000000..4c49648e0646 --- /dev/null +++ b/drivers/pci/switch/Kconfig @@ -0,0 +1,13 @@ +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 |