Commit Graph

11 Commits

Author SHA1 Message Date
Johannes Thumshirn 29ea6be366 mcb: add Altera PCI ID to mcb-pci
Some older PCI attached MEN FPGAs use an Altera PCI Vendor ID instead
of the MEN one. Add it to the PCI ID table so the driver automatically
attaches to it.

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reported-by: Ben Turner <ben.turner@21net.com>
Tested-by: Ben Turner <ben.turner@21net.com>
Cc: Andreas Geißler <andreas.geissler@men.de>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-03-14 19:13:48 +01:00
Michael Moese 15bb81d334 mcb: Enable PCI bus mastering by default
In order to successfully perform DMA operations on PCI devices,
it is necessary to enble PCI bus mastering, so enable it by default.

Signed-off-by: Michael Moese <michael.moese@men.de>
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-09-27 12:33:47 +02:00
Andreas Werner 8cd1f9d01c mcb: Delete num_cells variable which is not required
The num_cells variable is only used in the dev_dbg print,
but we can directly use the ret variable which also includes the same
value.

Signed-off-by: Andreas Werner <andreas.werner@men.de>
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-03 15:52:28 -07:00
Andreas Werner d19366f1d6 mcb: Replace ioremap and request_region with the devm version
Replaced ioremap with devm_ioremap and request_mem_region with
devm_request_mem_region. This makes the code much more cleaner.

Signed-off-by: Andreas Werner <andreas.werner@men.de>
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-03 15:52:28 -07:00
Alexey Khoroshilov bf25c19979 mcb: Do not return zero on error path in mcb_pci_probe()
There is an error path in mcb_pci_probe() where
it returns zero instead of error code.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-10-29 09:02:16 +09:00
Alexey Khoroshilov 41ada9df7f mcb: Fix error handling in mcb_pci_probe()
If a MCB PCI Carrier device is IO mapped insted of memory-mapped,
the memory of the PCI device is still not unmapped.

Also the patch adds deallocation of the bus
if chameleon_parse_cells() fails.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-10-05 05:10:01 +01:00
Dan Carpenter d86fb45b5c mcb: request_mem_region() returns NULL on error
The code here is checking for IS_ERR() when request_mem_region() only
returns NULL on error and never an ERR_PTR.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-04-03 16:15:30 +02:00
Johannes Thumshirn a48742bce1 mcb: Fix error path of mcb_pci_probe
If a MCB PCI Carrier device is IO mapped insted of memory-mapped (which is
currently unsupported by the upstream driver) the probe function bails out
with -ENOTSUPP.

In this case the memory of the PCI device was not unmapped.
Also rename error label to reflect what will happen at the destination (suggested
by Julia Lawall <julia.lawall@lip6.fr>.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@men.de>
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-03 15:48:51 -08:00
Johannes Thumshirn 7b7c54914f mcb: mcb-pci: Only remap the 1st 0x200 bytes of BAR 0
Currently it is not possible to have a kernel with built-in MCB attached
devices. This results out of the fact that mcb-pci requests PCI BAR 0, then
parses the chameleon table and calls the driver's probe function before
releasing BAR 0 again. When building the kernel with modules this is not a
problem (and therefore it wasn't detected by my tests yet).

A solution is to only remap the 1st 0x200 bytes of a Chameleon PCI device.
0x200 bytes is the maximum size of a Chameleon v2 Table.

Also this patch stops disabling the PCI device on successful registration of MCB
devices.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@men.de>
Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-09 15:46:37 -08:00
Johannes Thumshirn 4ec65b77c6 mcb: Add support for shared PCI IRQs
Add support for shared PCI IRQs to mcb and mcb-pci.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@men.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-27 17:38:11 -07:00
Johannes Thumshirn b71bb86398 mcb: Add PCI carrier for MEN Chameleon Bus
Add support for MCB over PCI devices. Both PCI attached on-board Chameleon FPGAs
as well as CompactPCI based MCB carrier cards are supported with this driver.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@men.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-28 15:47:12 -08:00