linux-toradex.git/drivers/fpga/altera-cvp.c, branch v7.0-rc2

fpga: altera-cvp: Use pci_find_vsec_capability() when probing FPGA device

2025-11-10T07:03:13+00:00

Currently altera_cvp_probe() open-codes pci_find_vsec_capability().
Refactor the former to use the latter.

With that done:
- use the VSEC ID as per datasheet [1]
- update the error message accordingly

Link: https://www.intel.com/content/www/us/en/docs/programmable/683763/23-1/vendor-specific-header-register.html [1]
Signed-off-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20251109201729.3220460-1-andriy.shevchenko@linux.intel.com
Reviewed-by: Xu Yilun 
Signed-off-by: Xu Yilun

fpga: altera-cvp: Increase credit timeout

2025-03-01T09:36:58+00:00

Increase the timeout for SDM (Secure device manager) data credits from
20ms to 40ms. Internal stress tests running at 500 loops failed with the
current timeout of 20ms. At the start of a FPGA configuration, the CVP
host driver reads the transmit credits from SDM. It then sends bitstream
FPGA data to SDM based on the total credits. Each credit allows the
CVP host driver to send 4kBytes of data. There are situations whereby,
the SDM did not respond in time during testing.

Signed-off-by: Ang Tien Sung 
Signed-off-by: Kuhanh Murugasen Krishnan 
Acked-by: Xu Yilun 
Link: https://lore.kernel.org/r/20250212221249.2715929-1-tien.sung.ang@intel.com
Signed-off-by: Xu Yilun

fpga: altera-cvp: Remove an unused field in struct altera_cvp_conf

2024-04-02T06:31:08+00:00

In "struct altera_cvp_conf", the 'mgr' field is unused.
Remove it.

Found with cppcheck, unusedStructMember.

Signed-off-by: Christophe JAILLET 
Acked-by: Xu Yilun 
Link: https://lore.kernel.org/r/7986690e79fa6f7880bc1db783cb0e46a1c2723e.1711976883.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Xu Yilun

fpga: mgr: Use standard dev_release for class driver

2021-11-28T21:59:13+00:00

The FPGA manager class driver data structure is being treated as a
managed resource instead of using the standard dev_release call-back
function to release the class data structure. This change removes
the managed resource code for the freeing of the class data structure
and combines the create() and register() functions into a single
register() or register_full() function.

The register_full() function accepts an info data structure to provide
flexibility in passing optional parameters. The register() function
supports the current parameter list for users that don't require the
use of optional parameters.

The devm_fpga_mgr_register() function is retained, and the
devm_fpga_mgr_register_full() function is added.

Signed-off-by: Russ Weight 
Reviewed-by: Xu Yilun 
Acked-by: Xu Yilun 
Signed-off-by: Moritz Fischer

fpga: fix spelling mistakes

2021-07-22T02:54:21+00:00

Run the fpga subsystem through aspell.

Signed-off-by: Tom Rix 
Reviewed-by: Fernando Pacheco 
Signed-off-by: Moritz Fischer

fpga: altera-cvp: Add Stratix10 (V2) Support

2019-08-24T18:38:29+00:00

Add Stratix10 specific functions that use a credit mechanism
to throttle data to the CvP FIFOs. Add a private structure
with function pointers for V1 vs V2 functions.

Signed-off-by: Thor Thayer 
Signed-off-by: Moritz Fischer

fpga: altera-cvp: Preparation for V2 parts.

2019-08-24T18:38:27+00:00

In preparation for adding newer V2 parts that use a FIFO,
reorganize altera_cvp_chk_error() and change the write
function to block based.
V2 parts have a block size matching the FIFO while older
V1 parts write a 32 bit word at a time.

Signed-off-by: Thor Thayer 
Signed-off-by: Moritz Fischer

fpga: altera-cvp: Discover Vendor Specific offset

2019-08-24T18:38:24+00:00

Newer Intel FPGAs have different Vendor Specific offsets than
legacy parts. Use PCI discovery to find the CvP registers.
Since the register positions remain the same, change the hard
coded address to a more flexible way of indexing registers
from the offset.
Adding new PCI read and write abstraction functions to
handle the offset (altera_read_config_dword() and
altera_write_config_dword()).

Signed-off-by: Thor Thayer 
Signed-off-by: Moritz Fischer

fpga: altera-cvp: Fix function definition argument

2019-07-24T21:10:42+00:00

Fix the following checkpatch warning:
WARNING: function definition argument 'struct altera_cvp_conf *'

Signed-off-by: Carlos A Petry 
Signed-off-by: Moritz Fischer

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 285

2019-06-05T15:36:37+00:00

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation version 2 of the license this program
  is distributed in the hope that it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 100 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Alexios Zavras 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141900.918357685@linutronix.de
Signed-off-by: Greg Kroah-Hartman