Currently the virtual port_dev device is passed to DMA API, and this is
wrong because the device passed to DMA API calls must be the actual
hardware device performing the DMA.
The patch replaces usb_gadget_map_request/usb_gadget_unmap_request APIs
with usb_gadget_map_request_by_dev/usb_gadget_unmap_request_by_dev APIs
so the DMA capable platform device can be passed to the DMA APIs.
The patch fixes below backtrace detected on Facebook AST2500 OpenBMC
platforms:
[<80106550>] show_stack+0x20/0x24
[<80106868>] dump_stack+0x28/0x30
[<80823540>] __warn+0xfc/0x110
[<8011ac30>] warn_slowpath_fmt+0xb0/0xc0
[<8011ad44>] dma_map_page_attrs+0x24c/0x314
[<8016a27c>] usb_gadget_map_request_by_dev+0x100/0x1e4
[<805cedd8>] usb_gadget_map_request+0x1c/0x20
[<805cefbc>] ast_vhub_epn_queue+0xa0/0x1d8
[<7f02f710>] usb_ep_queue+0x48/0xc4
[<805cd3e8>] ecm_do_notify+0xf8/0x248
[<7f145920>] ecm_set_alt+0xc8/0x1d0
[<7f145c34>] composite_setup+0x680/0x1d30
[<7f00deb8>] ast_vhub_ep0_handle_setup+0xa4/0x1bc
[<7f02ee94>] ast_vhub_dev_irq+0x58/0x84
[<7f0309e0>] ast_vhub_irq+0xb0/0x1c8
[<7f02e118>] __handle_irq_event_percpu+0x50/0x19c
[<8015e5bc>] handle_irq_event_percpu+0x38/0x8c
[<8015e758>] handle_irq_event+0x38/0x4c
Fixes: 7ecca2a408 ("usb/gadget: Add driver for Aspeed SoC virtual hub")
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Link: https://lore.kernel.org/r/20210331045831.28700-1-rentao.bupt@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This is a follow-on patch for commit a23be4ed8f ("usb: gadget: aspeed:
improve vhub port irq handling"): for_each_set_bit() is replaced with
simple for() loop because for() loop runs faster on ASPEED BMC.
Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
This patch introduces a link list to store string descriptors with
different languages, and "ast_vhub_rep_string" function is also improved
to support multiple language usb strings.
Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
This patch evaluates vhub ports' irq mask before going through per-port
irq handling one by one, which helps to speed up irq handling in case
there is no port interrupt.
Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Add AST2600 support in aspeed-vhub driver. There are 3 major differences
between AST2500 and AST2600 vhub:
- AST2600 supports 7 downstream ports while AST2500 supports 5.
- AST2600 supports 21 generic endpoints while AST2500 supports 15.
- EP0 data buffer's 8-byte DMA alignment restriction is removed from
AST2600.
Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
The patch introduces 2 DT properties ("aspeed,vhub-downstream-ports" and
"aspeed,vhub-generic-endpoints") which replaces hardcoded port/endpoint
number. It is to make it more convenient to add support for newer vhub
revisions with different number of ports and endpoints.
Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Felipe writes:
USB: Changes for v5.4 merge window
With only 45 non-merge commits, we have a small merge window from the
Gadget perspective.
The biggest change here is the addition of the Cadence USB3 DRD
Driver. All other changes are small, non-critical fixes or smaller new
features like the improvement to BESL handling in dwc3.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
* tag 'usb-for-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb: (45 commits)
usb: gadget: net2280: Add workaround for AB chip Errata 11
usb: gadget: net2280: Move all "ll" registers in one structure
usb: dwc3: gadget: Workaround Mirosoft's BESL check
usb:cdns3 Fix for stuck packets in on-chip OUT buffer.
usb: cdns3: Add Cadence USB3 DRD Driver
usb: common: Simplify usb_decode_get_set_descriptor function.
usb: common: Patch simplify usb_decode_set_clear_feature function.
usb: common: Separated decoding functions from dwc3 driver.
dt-bindings: add binding for USBSS-DRD controller.
usb: gadget: composite: Set recommended BESL values
usb: dwc3: gadget: Set BESL config parameter
usb: dwc3: Separate field holding multiple properties
usb: gadget: Export recommended BESL values
usb: phy: phy-fsl-usb: Make structure fsl_otg_initdata constant
usb: udc: lpc32xx: silence fall-through warning
usb: dwc3: meson-g12a: fix suspend resume regulator unbalanced disables
usb: udc: lpc32xx: remove set but not used 3 variables
usb: gadget: udc: core: Fix segfault if udc_bind_to_driver() for pending driver fails
usb: dwc3: st: Add of_dev_put() in probe function
usb: dwc3: st: Add of_node_put() before return in probe function
...
When nuking requests, it's useful to display how many were
actually nuked. It has proven handy when debugging issues
where EP0 went in a wrong state.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
We don't need dev_err() messages when platform_get_irq() fails now that
platform_get_irq() prints an error message itself when something goes
wrong. Let's remove these prints with a simple semantic patch.
// <smpl>
@@
expression ret;
struct platform_device *E;
@@
ret =
(
platform_get_irq(E, ...)
|
platform_get_irq_byname(E, ...)
);
if ( \( ret < 0 \| ret <= 0 \) )
{
(
-if (ret != -EPROBE_DEFER)
-{ ...
-dev_err(...);
-... }
|
...
-dev_err(...);
)
...
}
// </smpl>
While we're here, remove braces on if statements that only have one
statement (manually).
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20190730181557.90391-47-swboyd@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The Aspeed BMC SoCs support a "virtual hub" function. It provides some
HW support for a top-level USB2 hub behind which sit 5 gadget "ports".
This driver adds support for the full functionality, emulating the
hub standard requests and exposing 5 UDC gadget drivers corresponding
to the ports.
The hub itself has HW provided dedicated EP0 and EP1 (the latter for
hub interrupts). It also has dedicated EP0s for each function. For
other endpoints, there's a pool of 15 "generic" endpoints that are
shared among the ports.
The driver relies on my previous patch adding a "dispose" EP op to
handle EP allocation between ports. EPs are allocated from the shared
pool in the UDC "match_ep" callback and assigned to the UDC instance
(added to the gadget ep_list).
When the composite driver gets unbound, the new hook will allow the UDC
to clean things up and return those EPs to the shared pool.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
