[PATCH v2 5/6] usb: dwc3: use bus->sysdev for DMA configuration

From: Sriram Dash
Date: Wed Nov 02 2016 - 01:38:56 EST

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From: Arnd Bergmann <arnd@xxxxxxxx>

The dma ops for dwc3 devices are not set properly. So, use a
physical device sysdev, which will be inherited from parent,
to set the hardware / firmware parameters like dma.

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Sriram Dash <sriram.dash@xxxxxxx>
---
Changes in v2:
- integrate dwc3 driver changes together

drivers/usb/dwc3/core.c | 28 +++++++++++++++-------------
drivers/usb/dwc3/core.h | 1 +
drivers/usb/dwc3/ep0.c | 8 ++++----
drivers/usb/dwc3/gadget.c | 37 +++++++++++++++++++------------------
drivers/usb/dwc3/host.c | 12 ++++--------
5 files changed, 43 insertions(+), 43 deletions(-)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 7287a76..0af0dc0 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -25,6 +25,7 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>
+#include <linux/pci.h>
#include <linux/pm_runtime.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
@@ -229,7 +230,7 @@ static void dwc3_frame_length_adjustment(struct dwc3 *dwc)
static void dwc3_free_one_event_buffer(struct dwc3 *dwc,
struct dwc3_event_buffer *evt)
{
- dma_free_coherent(dwc->dev, evt->length, evt->buf, evt->dma);
+ dma_free_coherent(dwc->sysdev, evt->length, evt->buf, evt->dma);
}

/**
@@ -251,7 +252,7 @@ static struct dwc3_event_buffer *dwc3_alloc_one_event_buffer(struct dwc3 *dwc,

evt->dwc = dwc;
evt->length = length;
- evt->buf = dma_alloc_coherent(dwc->dev, length,
+ evt->buf = dma_alloc_coherent(dwc->sysdev, length,
&evt->dma, GFP_KERNEL);
if (!evt->buf)
return ERR_PTR(-ENOMEM);
@@ -370,11 +371,11 @@ static int dwc3_setup_scratch_buffers(struct dwc3 *dwc)
if (!WARN_ON(dwc->scratchbuf))
return 0;

- scratch_addr = dma_map_single(dwc->dev, dwc->scratchbuf,
+ scratch_addr = dma_map_single(dwc->sysdev, dwc->scratchbuf,
dwc->nr_scratch * DWC3_SCRATCHBUF_SIZE,
DMA_BIDIRECTIONAL);
- if (dma_mapping_error(dwc->dev, scratch_addr)) {
- dev_err(dwc->dev, "failed to map scratch buffer\n");
+ if (dma_mapping_error(dwc->sysdev, scratch_addr)) {
+ dev_err(dwc->sysdev, "failed to map scratch buffer\n");
ret = -EFAULT;
goto err0;
}
@@ -398,7 +399,7 @@ static int dwc3_setup_scratch_buffers(struct dwc3 *dwc)
return 0;

err1:
- dma_unmap_single(dwc->dev, dwc->scratch_addr, dwc->nr_scratch *
+ dma_unmap_single(dwc->sysdev, dwc->scratch_addr, dwc->nr_scratch *
DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL);

err0:
@@ -417,7 +418,7 @@ static void dwc3_free_scratch_buffers(struct dwc3 *dwc)
if (!WARN_ON(dwc->scratchbuf))
return;

- dma_unmap_single(dwc->dev, dwc->scratch_addr, dwc->nr_scratch *
+ dma_unmap_single(dwc->sysdev, dwc->scratch_addr, dwc->nr_scratch *
DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL);
kfree(dwc->scratchbuf);
}
@@ -943,6 +944,13 @@ static int dwc3_probe(struct platform_device *pdev)
dwc = PTR_ALIGN(mem, DWC3_ALIGN_MASK + 1);
dwc->mem = mem;
dwc->dev = dev;
+#ifdef CONFIG_PCI
+ /* TODO: or some other way of detecting this? */
+ if (dwc->dev->parent && dwc->dev->parent->bus == &pci_bus_type)
+ dwc->sysdev = dwc->dev->parent;
+ else
+#endif
+ dwc->sysdev = dwc->dev;

res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
@@ -1051,12 +1059,6 @@ static int dwc3_probe(struct platform_device *pdev)

spin_lock_init(&dwc->lock);

- if (!dev->dma_mask) {
- dev->dma_mask = dev->parent->dma_mask;
- dev->dma_parms = dev->parent->dma_parms;
- dma_set_coherent_mask(dev, dev->parent->coherent_dma_mask);
- }
-
pm_runtime_set_active(dev);
pm_runtime_use_autosuspend(dev);
pm_runtime_set_autosuspend_delay(dev, DWC3_DEFAULT_AUTOSUSPEND_DELAY);
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 6b60e42..b166b0a 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -851,6 +851,7 @@ struct dwc3 {
spinlock_t lock;

struct device *dev;
+ struct device *sysdev;

struct platform_device *xhci;
struct resource xhci_resources[DWC3_XHCI_RESOURCES_NUM];
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index fe79d77..4d13723 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -974,8 +974,8 @@ static void __dwc3_ep0_do_control_data(struct dwc3 *dwc,
u32 transfer_size = 0;
u32 maxpacket;

- ret = usb_gadget_map_request(&dwc->gadget, &req->request,
- dep->number);
+ ret = usb_gadget_map_request_by_dev(dwc->sysdev,
+ &req->request, dep->number);
if (ret) {
dwc3_trace(trace_dwc3_ep0, "failed to map request");
return;
@@ -1002,8 +1002,8 @@ static void __dwc3_ep0_do_control_data(struct dwc3 *dwc,
dwc->ep0_bounce_addr, transfer_size,
DWC3_TRBCTL_CONTROL_DATA, false);
} else {
- ret = usb_gadget_map_request(&dwc->gadget, &req->request,
- dep->number);
+ ret = usb_gadget_map_request_by_dev(dwc->sysdev,
+ &req->request, dep->number);
if (ret) {
dwc3_trace(trace_dwc3_ep0, "failed to map request");
return;
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 1dfa56a5f..84fff5e 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -185,8 +185,8 @@ void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
if (dwc->ep0_bounced && dep->number == 0)
dwc->ep0_bounced = false;
else
- usb_gadget_unmap_request(&dwc->gadget, &req->request,
- req->direction);
+ usb_gadget_unmap_request_by_dev(dwc->sysdev,
+ &req->request, req->direction);

trace_dwc3_gadget_giveback(req);

@@ -365,7 +365,7 @@ static int dwc3_alloc_trb_pool(struct dwc3_ep *dep)
if (dep->trb_pool)
return 0;

- dep->trb_pool = dma_alloc_coherent(dwc->dev,
+ dep->trb_pool = dma_alloc_coherent(dwc->sysdev,
sizeof(struct dwc3_trb) * DWC3_TRB_NUM,
&dep->trb_pool_dma, GFP_KERNEL);
if (!dep->trb_pool) {
@@ -381,7 +381,7 @@ static void dwc3_free_trb_pool(struct dwc3_ep *dep)
{
struct dwc3 *dwc = dep->dwc;

- dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM,
+ dma_free_coherent(dwc->sysdev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM,
dep->trb_pool, dep->trb_pool_dma);

dep->trb_pool = NULL;
@@ -989,8 +989,8 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param)
* here and stop, unmap, free and del each of the linked
* requests instead of what we do now.
*/
- usb_gadget_unmap_request(&dwc->gadget, &req->request,
- req->direction);
+ usb_gadget_unmap_request_by_dev(dwc->sysdev,
+ &req->request, req->direction);
list_del(&req->list);
return ret;
}
@@ -1063,8 +1063,8 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)

trace_dwc3_ep_queue(req);

- ret = usb_gadget_map_request(&dwc->gadget, &req->request,
- dep->direction);
+ ret = usb_gadget_map_request_by_dev(dwc->sysdev, &req->request,
+ dep->direction);
if (ret)
return ret;

@@ -2889,7 +2889,7 @@ int dwc3_gadget_init(struct dwc3 *dwc)

dwc->irq_gadget = irq;

- dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req),
+ dwc->ctrl_req = dma_alloc_coherent(dwc->sysdev, sizeof(*dwc->ctrl_req),
&dwc->ctrl_req_addr, GFP_KERNEL);
if (!dwc->ctrl_req) {
dev_err(dwc->dev, "failed to allocate ctrl request\n");
@@ -2897,8 +2897,9 @@ int dwc3_gadget_init(struct dwc3 *dwc)
goto err0;
}

- dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb) * 2,
- &dwc->ep0_trb_addr, GFP_KERNEL);
+ dwc->ep0_trb = dma_alloc_coherent(dwc->sysdev,
+ sizeof(*dwc->ep0_trb) * 2,
+ &dwc->ep0_trb_addr, GFP_KERNEL);
if (!dwc->ep0_trb) {
dev_err(dwc->dev, "failed to allocate ep0 trb\n");
ret = -ENOMEM;
@@ -2911,7 +2912,7 @@ int dwc3_gadget_init(struct dwc3 *dwc)
goto err2;
}

- dwc->ep0_bounce = dma_alloc_coherent(dwc->dev,
+ dwc->ep0_bounce = dma_alloc_coherent(dwc->sysdev,
DWC3_EP0_BOUNCE_SIZE, &dwc->ep0_bounce_addr,
GFP_KERNEL);
if (!dwc->ep0_bounce) {
@@ -2983,18 +2984,18 @@ int dwc3_gadget_init(struct dwc3 *dwc)

err4:
dwc3_gadget_free_endpoints(dwc);
- dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE,
+ dma_free_coherent(dwc->sysdev, DWC3_EP0_BOUNCE_SIZE,
dwc->ep0_bounce, dwc->ep0_bounce_addr);

err3:
kfree(dwc->setup_buf);

err2:
- dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb) * 2,
+ dma_free_coherent(dwc->sysdev, sizeof(*dwc->ep0_trb) * 2,
dwc->ep0_trb, dwc->ep0_trb_addr);

err1:
- dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req),
+ dma_free_coherent(dwc->sysdev, sizeof(*dwc->ctrl_req),
dwc->ctrl_req, dwc->ctrl_req_addr);

err0:
@@ -3009,16 +3010,16 @@ void dwc3_gadget_exit(struct dwc3 *dwc)

dwc3_gadget_free_endpoints(dwc);

- dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE,
+ dma_free_coherent(dwc->sysdev, DWC3_EP0_BOUNCE_SIZE,
dwc->ep0_bounce, dwc->ep0_bounce_addr);

kfree(dwc->setup_buf);
kfree(dwc->zlp_buf);

- dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb) * 2,
+ dma_free_coherent(dwc->sysdev, sizeof(*dwc->ep0_trb) * 2,
dwc->ep0_trb, dwc->ep0_trb_addr);

- dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req),
+ dma_free_coherent(dwc->sysdev, sizeof(*dwc->ctrl_req),
dwc->ctrl_req, dwc->ctrl_req_addr);
}

diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
index f6533c6..045ec27 100644
--- a/drivers/usb/dwc3/host.c
+++ b/drivers/usb/dwc3/host.c
@@ -72,11 +72,7 @@ int dwc3_host_init(struct dwc3 *dwc)
return -ENOMEM;
}

- dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask);
-
xhci->dev.parent = dwc->dev;
- xhci->dev.dma_mask = dwc->dev->dma_mask;
- xhci->dev.dma_parms = dwc->dev->dma_parms;

dwc->xhci = xhci;

@@ -112,9 +108,9 @@ int dwc3_host_init(struct dwc3 *dwc)
return 0;
err2:
phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
- dev_name(&xhci->dev));
+ dev_name(dwc->dev));
phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
- dev_name(&xhci->dev));
+ dev_name(dwc->dev));
err1:
platform_device_put(xhci);
return ret;
@@ -123,8 +119,8 @@ int dwc3_host_init(struct dwc3 *dwc)
void dwc3_host_exit(struct dwc3 *dwc)
{
phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
- dev_name(&dwc->xhci->dev));
+ dev_name(dwc->dev));
phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
- dev_name(&dwc->xhci->dev));
+ dev_name(dwc->dev));
platform_device_unregister(dwc->xhci);
}
--
2.1.0

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