Firas Ashkar e4e050167f uio: uio_pci_generic: add memory resource mappings ... import memory resources from underlying pci device, thus allowing userspace applications to memory map those resources. without this change, current implementation, does not populate the memory maps and are not shown under the corresponding sysfs uio entry: root@apalis-imx8:~# echo "ad00 0122" > \ /sys/bus/pci/drivers/uio_pci_generic/new_id [ 55.736433] uio_pci_generic 0000:01:00.0: enabling device (0000 -> 0002) root@apalis-imx8:~# ls -lsrt /sys/class/uio/uio0/ 0 -rw-r--r-- 1 root root 4096 Apr 27 18:52 uevent 0 -r--r--r-- 1 root root 4096 Apr 27 18:52 version 0 -r--r--r-- 1 root root 4096 Apr 27 18:52 suppliers 0 lrwxrwxrwx 1 root root 0 Apr 27 18:52 subsystem -> ../../../../../../../../../class/uio 0 drwxr-xr-x 2 root root 0 Apr 27 18:52 power 0 -r--r--r-- 1 root root 4096 Apr 27 18:52 name 0 -r--r--r-- 1 root root 4096 Apr 27 18:52 event 0 lrwxrwxrwx 1 root root 0 Apr 27 18:52 device -> ../../../0000:01:00.0 0 -r--r--r-- 1 root root 4096 Apr 27 18:52 dev 0 -r--r--r-- 1 root root 4096 Apr 27 18:52 consumers root@apalis-imx8:~# with the proposed changed, have following instead: root@apalis-imx8:~# ls -lsrt /sys/class/uio/uio0/ 0 -rw-r--r-- 1 root root 4096 Apr 27 19:06 uevent 0 -r--r--r-- 1 root root 4096 Apr 27 19:06 version 0 -r--r--r-- 1 root root 4096 Apr 27 19:06 suppliers 0 lrwxrwxrwx 1 root root 0 Apr 27 19:06 subsystem -> ../../../../../../../../../class/uio 0 drwxr-xr-x 2 root root 0 Apr 27 19:06 power 0 -r--r--r-- 1 root root 4096 Apr 27 19:06 name 0 drwxr-xr-x 4 root root 0 Apr 27 19:06 maps 0 -r--r--r-- 1 root root 4096 Apr 27 19:06 event 0 lrwxrwxrwx 1 root root 0 Apr 27 19:06 device -> ../../../0000:01:00.0 0 -r--r--r-- 1 root root 4096 Apr 27 19:06 dev 0 -r--r--r-- 1 root root 4096 Apr 27 19:06 consumers root@apalis-imx8:~# root@apalis-imx8:~# ls -lsrt /sys/class/uio/uio0/maps/ 0 drwxr-xr-x 2 root root 0 Apr 27 19:07 map1 0 drwxr-xr-x 2 root root 0 Apr 27 19:07 map0 root@apalis-imx8:~# root@apalis-imx8:~# cat /sys/class/uio/uio0/maps/map1/addr 0x0000000062000000 root@apalis-imx8:~# root@apalis-imx8:~# cat /sys/class/uio/uio0/maps/map1/size 0x0000000000200000 root@apalis-imx8:~# tested on AltaData ARINC 429 MiniPCIE module on imx8qm-apalis-ixora-v1.2 Signed-off-by: Firas Ashkar <firas.ashkar@savoirfairelinux.com> Link: https://lore.kernel.org/r/20210427201046.4005820-1-firas.ashkar@savoirfairelinux.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-05-14 13:42:11 +02:00
..
Kconfig	uio: uio_dfl: add userspace i/o driver for DFL bus	2021-03-28 14:58:18 +02:00
Makefile	uio: uio_dfl: add userspace i/o driver for DFL bus	2021-03-28 14:58:18 +02:00
uio.c	Merge 5.10-rc4 into char-misc-next	2020-11-16 09:18:46 +01:00
uio_aec.c	uio: uio_aec: Use pci_iounmap instead of iounmap	2021-05-14 13:39:47 +02:00
uio_cif.c	uio: uio_cif: use devm_kzalloc() for uio_info object	2020-12-09 19:59:00 +01:00
uio_dfl.c	uio: uio_dfl: add userspace i/o driver for DFL bus	2021-03-28 14:58:18 +02:00
uio_dmem_genirq.c	uio: uio_dmem_genirq: finalize conversion of probe to devm_ handlers	2020-12-09 19:58:22 +01:00
uio_fsl_elbc_gpcm.c	uio: uio_fsl_elbc_gpcm: use device-managed allocators	2020-12-09 19:59:00 +01:00
uio_hv_generic.c	uio: uio_hv_generic: use devm_kzalloc() for private data alloc	2020-12-09 19:59:00 +01:00
uio_mf624.c	uio: uio_mf624: use devm_kzalloc() for uio_info object	2020-12-09 19:58:54 +01:00
uio_netx.c	uio: uio_netx: use devm_kzalloc() for or uio_info object	2020-12-09 19:58:54 +01:00
uio_pci_generic.c	uio: uio_pci_generic: add memory resource mappings	2021-05-14 13:42:11 +02:00
uio_pdrv_genirq.c	Merge branch 'char-misc-linus' into 'char-misc-next'	2020-07-10 13:42:33 +02:00
uio_pruss.c	uio: pruss: use devm_clk_get() for clk init	2020-12-09 19:57:03 +01:00
uio_sercos3.c	uio: uio_sercos3: use device-managed functions for simple allocs	2020-12-09 19:58:54 +01:00