Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit c8801d8c authored by Leon Woestenberg's avatar Leon Woestenberg Committed by Greg Kroah-Hartman
Browse files

Staging: add Driver for Altera PCI Express Chaining DMA reference design 



Altera PCI Express Chaining DMA driver

A reference driver that exercises the Chaining DMA logic reference
design generated along the Altera FPGA PCI Express soft or hard core,
only if instantiated using the MegaWizard, not the SOPC builder, of
Quartus 8.1.

This driver can be used to test the logic instantiation and PCI
Express layers and acts as a starting point for driving custom logic
connected to the PCI Express End Point Chaining DMA engines.

Signed-off-by: default avatarLeon Woestenberg <leon@sidebranch.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 63023177

drivers/staging/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -79,5 +79,7 @@ source "drivers/staging/asus_oled/Kconfig" 


source "drivers/staging/panel/Kconfig"



source "drivers/staging/altpciechdma/Kconfig"



endif # !STAGING_EXCLUDE_BUILD

endif # STAGING

drivers/staging/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -22,3 +22,4 @@ obj-$(CONFIG_BENET) += benet/ 
obj-$(CONFIG_COMEDI)		+= comedi/

obj-$(CONFIG_ASUS_OLED)		+= asus_oled/

obj-$(CONFIG_PANEL)		+= panel/

obj-$(CONFIG_ALTERA_PCIE_CHDMA)	+= altpciechdma/

drivers/staging/altpciechdma/Kconfig

0 → 100644
+10 −0
Original line number Diff line number Diff line 
config ALTERA_PCIE_CHDMA

	tristate "Altera PCI Express Chaining DMA driver"

	depends on PCI

	default N

	---help---

	  A reference driver that exercises the Chaining DMA logic reference

	  design generated along the Altera FPGA PCI Express soft or hard core,

	  only if instantiated using the MegaWizard, not the SOPC builder, of

	  Quartus 8.1.

drivers/staging/altpciechdma/Makefile

0 → 100644
+2 −0
Original line number Diff line number Diff line 
obj-$(CONFIG_ALTERA_PCIE_CHDMA)	+= altpciechdma.o

drivers/staging/altpciechdma/TODO

0 → 100644
+15 −0
Original line number Diff line number Diff line 
DONE:

    - functionality similar to logic testbench



TODO:

	- checkpatch.pl cleanups.

	- keep state of DMA engines.

	- keep data structure that keeps state of each transfer.

	- interrupt handler should iterate over outstanding descriptor tables.

	- complete userspace cdev to read/write using the DMA engines.

	- split off the DMA support functions in a module, re-usable by custom

	  drivers.



Please coordinate work with, and send patches to

Leon Woestenberg <leon@sidebranch.com>