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Code Issues Releases Wiki Activity

4 bug fixes for Cadence 3 driver.

Browse source 
The biggest fix is changing endpoint configuration method to
 avoid FIFO overflow at multiple endpoints situation.
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Merge tag 'usb-v5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb into usb-linus

Peter writes:

4 bug fixes for Cadence 3 driver.
The biggest fix is changing endpoint configuration method to
avoid FIFO overflow at multiple endpoints situation.

* tag 'usb-v5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb:
  usb: cdns3: gadget: own the lock wrongly at the suspend routine
  usb: cdns3: Fix on-chip memory overflow issue
  usb: cdns3: gadget: suspicious implicit sign extension
  usb: cdns3: Variable 'length' set but not used
This commit is contained in:
Greg Kroah-Hartman 2020-10-30 11:46:49 +01:00
commit 00c27a1df8
3 changed files with 102 additions and 83 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

65
drivers/usb/cdns3/ep0.c
View file

@ -137,48 +137,36 @@ static int cdns3_req_ep0_set_configuration(struct cdns3_device *priv_dev,
struct usb_ctrlrequest *ctrl_req)
{
enum usb_device_state device_state = priv_dev->gadget.state;
struct cdns3_endpoint *priv_ep;
u32 config = le16_to_cpu(ctrl_req->wValue);
int result = 0;
int i;
switch (device_state) {
case USB_STATE_ADDRESS:
/* Configure non-control EPs */
for (i = 0; i < CDNS3_ENDPOINTS_MAX_COUNT; i++) {
priv_ep = priv_dev->eps[i];
if (!priv_ep)
continue;
if (priv_ep->flags & EP_CLAIMED)
cdns3_ep_config(priv_ep);
}
result = cdns3_ep0_delegate_req(priv_dev, ctrl_req);
if (result)
return result;
if (!config) {
cdns3_hw_reset_eps_config(priv_dev);
usb_gadget_set_state(&priv_dev->gadget,
USB_STATE_ADDRESS);
}
if (result || !config)
goto reset_config;
break;
case USB_STATE_CONFIGURED:
result = cdns3_ep0_delegate_req(priv_dev, ctrl_req);
if (!config && !result)
goto reset_config;
if (!config && !result) {
cdns3_hw_reset_eps_config(priv_dev);
usb_gadget_set_state(&priv_dev->gadget,
USB_STATE_ADDRESS);
}
break;
default:
result = -EINVAL;
return -EINVAL;
}
return 0;
reset_config:
if (result != USB_GADGET_DELAYED_STATUS)
cdns3_hw_reset_eps_config(priv_dev);
usb_gadget_set_state(&priv_dev->gadget,
USB_STATE_ADDRESS);
return result;
}
@ -705,6 +693,7 @@ static int cdns3_gadget_ep0_queue(struct usb_ep *ep,
unsigned long flags;
int ret = 0;
u8 zlp = 0;
int i;
spin_lock_irqsave(&priv_dev->lock, flags);
trace_cdns3_ep0_queue(priv_dev, request);
@ -720,6 +709,17 @@ static int cdns3_gadget_ep0_queue(struct usb_ep *ep,
u32 val;
cdns3_select_ep(priv_dev, 0x00);
/*
* Configure all non-control EPs which are not enabled by class driver
*/
for (i = 0; i < CDNS3_ENDPOINTS_MAX_COUNT; i++) {
priv_ep = priv_dev->eps[i];
if (priv_ep && priv_ep->flags & EP_CLAIMED &&
!(priv_ep->flags & EP_ENABLED))
cdns3_ep_config(priv_ep, 0);
}
cdns3_set_hw_configuration(priv_dev);
cdns3_ep0_complete_setup(priv_dev, 0, 1);
/* wait until configuration set */
@ -811,6 +811,7 @@ void cdns3_ep0_config(struct cdns3_device *priv_dev)
struct cdns3_usb_regs __iomem *regs;
struct cdns3_endpoint *priv_ep;
u32 max_packet_size = 64;
u32 ep_cfg;
regs = priv_dev->regs;
@ -842,8 +843,10 @@ void cdns3_ep0_config(struct cdns3_device *priv_dev)
BIT(0) | BIT(16));
}
writel(EP_CFG_ENABLE | EP_CFG_MAXPKTSIZE(max_packet_size),
&regs->ep_cfg);
ep_cfg = EP_CFG_ENABLE | EP_CFG_MAXPKTSIZE(max_packet_size);
if (!(priv_ep->flags & EP_CONFIGURED))
writel(ep_cfg, &regs->ep_cfg);
writel(EP_STS_EN_SETUPEN | EP_STS_EN_DESCMISEN | EP_STS_EN_TRBERREN,
&regs->ep_sts_en);
@ -851,8 +854,10 @@ void cdns3_ep0_config(struct cdns3_device *priv_dev)
/* init ep in */
cdns3_select_ep(priv_dev, USB_DIR_IN);
writel(EP_CFG_ENABLE | EP_CFG_MAXPKTSIZE(max_packet_size),
&regs->ep_cfg);
if (!(priv_ep->flags & EP_CONFIGURED))
writel(ep_cfg, &regs->ep_cfg);
priv_ep->flags |= EP_CONFIGURED;
writel(EP_STS_EN_SETUPEN | EP_STS_EN_TRBERREN, &regs->ep_sts_en);

115
drivers/usb/cdns3/gadget.c
View file

@ -296,6 +296,8 @@ static void cdns3_ep_stall_flush(struct cdns3_endpoint *priv_ep)
*/
void cdns3_hw_reset_eps_config(struct cdns3_device *priv_dev)
{
int i;
writel(USB_CONF_CFGRST, &priv_dev->regs->usb_conf);
cdns3_allow_enable_l1(priv_dev, 0);
@ -304,6 +306,10 @@ void cdns3_hw_reset_eps_config(struct cdns3_device *priv_dev)
priv_dev->out_mem_is_allocated = 0;
priv_dev->wait_for_setup = 0;
priv_dev->using_streams = 0;
for (i = 0; i < CDNS3_ENDPOINTS_MAX_COUNT; i++)
if (priv_dev->eps[i])
priv_dev->eps[i]->flags &= ~EP_CONFIGURED;
}
/**
@ -506,7 +512,6 @@ static void cdns3_wa2_descmiss_copy_data(struct cdns3_endpoint *priv_ep,
while (!list_empty(&priv_ep->wa2_descmiss_req_list)) {
int chunk_end;
int length;
descmiss_priv_req =
cdns3_next_priv_request(&priv_ep->wa2_descmiss_req_list);
@ -517,7 +522,6 @@ static void cdns3_wa2_descmiss_copy_data(struct cdns3_endpoint *priv_ep,
break;
chunk_end = descmiss_priv_req->flags & REQUEST_INTERNAL_CH;
length = request->actual + descmiss_req->actual;
request->status = descmiss_req->status;
__cdns3_descmiss_copy_data(request, descmiss_req);
list_del_init(&descmiss_priv_req->list);
@ -1746,11 +1750,8 @@ static int cdns3_check_ep_interrupt_proceed(struct cdns3_endpoint *priv_ep)
static void cdns3_disconnect_gadget(struct cdns3_device *priv_dev)
{
if (priv_dev->gadget_driver && priv_dev->gadget_driver->disconnect) {
spin_unlock(&priv_dev->lock);
if (priv_dev->gadget_driver && priv_dev->gadget_driver->disconnect)
priv_dev->gadget_driver->disconnect(&priv_dev->gadget);
spin_lock(&priv_dev->lock);
}
}
/**
@ -1761,6 +1762,7 @@ static void cdns3_disconnect_gadget(struct cdns3_device *priv_dev)
*/
static void cdns3_check_usb_interrupt_proceed(struct cdns3_device *priv_dev,
u32 usb_ists)
__must_hold(&priv_dev->lock)
{
int speed = 0;
@ -1785,7 +1787,9 @@ static void cdns3_check_usb_interrupt_proceed(struct cdns3_device *priv_dev,
/* Disconnection detected */
if (usb_ists & (USB_ISTS_DIS2I | USB_ISTS_DISI)) {
spin_unlock(&priv_dev->lock);
cdns3_disconnect_gadget(priv_dev);
spin_lock(&priv_dev->lock);
priv_dev->gadget.speed = USB_SPEED_UNKNOWN;
usb_gadget_set_state(&priv_dev->gadget, USB_STATE_NOTATTACHED);
cdns3_hw_reset_eps_config(priv_dev);
@ -1979,27 +1983,6 @@ static int cdns3_ep_onchip_buffer_reserve(struct cdns3_device *priv_dev,
return 0;
}
static void cdns3_stream_ep_reconfig(struct cdns3_device *priv_dev,
struct cdns3_endpoint *priv_ep)
{
if (!priv_ep->use_streams || priv_dev->gadget.speed < USB_SPEED_SUPER)
return;
if (priv_dev->dev_ver >= DEV_VER_V3) {
u32 mask = BIT(priv_ep->num + (priv_ep->dir ? 16 : 0));
/*
* Stream capable endpoints are handled by using ep_tdl
* register. Other endpoints use TDL from TRB feature.
*/
cdns3_clear_register_bit(&priv_dev->regs->tdl_from_trb, mask);
}
/* Enable Stream Bit TDL chk and SID chk */
cdns3_set_register_bit(&priv_dev->regs->ep_cfg, EP_CFG_STREAM_EN |
EP_CFG_TDL_CHK | EP_CFG_SID_CHK);
}
static void cdns3_configure_dmult(struct cdns3_device *priv_dev,
struct cdns3_endpoint *priv_ep)
{
@ -2037,8 +2020,9 @@ static void cdns3_configure_dmult(struct cdns3_device *priv_dev,
/**
* cdns3_ep_config Configure hardware endpoint
* @priv_ep: extended endpoint object
* @enable: set EP_CFG_ENABLE bit in ep_cfg register.
*/
void cdns3_ep_config(struct cdns3_endpoint *priv_ep)
int cdns3_ep_config(struct cdns3_endpoint *priv_ep, bool enable)
{
bool is_iso_ep = (priv_ep->type == USB_ENDPOINT_XFER_ISOC);
struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
@ -2099,7 +2083,7 @@ void cdns3_ep_config(struct cdns3_endpoint *priv_ep)
break;
default:
/* all other speed are not supported */
return;
return -EINVAL;
}
if (max_packet_size == 1024)
@ -2109,11 +2093,33 @@ void cdns3_ep_config(struct cdns3_endpoint *priv_ep)
else
priv_ep->trb_burst_size = 16;
ret = cdns3_ep_onchip_buffer_reserve(priv_dev, buffering + 1,
!!priv_ep->dir);
if (ret) {
dev_err(priv_dev->dev, "onchip mem is full, ep is invalid\n");
return;
/* onchip buffer is only allocated before configuration */
if (!priv_dev->hw_configured_flag) {
ret = cdns3_ep_onchip_buffer_reserve(priv_dev, buffering + 1,
!!priv_ep->dir);
if (ret) {
dev_err(priv_dev->dev, "onchip mem is full, ep is invalid\n");
return ret;
}
}
if (enable)
ep_cfg |= EP_CFG_ENABLE;
if (priv_ep->use_streams && priv_dev->gadget.speed >= USB_SPEED_SUPER) {
if (priv_dev->dev_ver >= DEV_VER_V3) {
u32 mask = BIT(priv_ep->num + (priv_ep->dir ? 16 : 0));
/*
* Stream capable endpoints are handled by using ep_tdl
* register. Other endpoints use TDL from TRB feature.
*/
cdns3_clear_register_bit(&priv_dev->regs->tdl_from_trb,
mask);
}
/* Enable Stream Bit TDL chk and SID chk */
ep_cfg |= EP_CFG_STREAM_EN | EP_CFG_TDL_CHK | EP_CFG_SID_CHK;
}
ep_cfg |= EP_CFG_MAXPKTSIZE(max_packet_size) |
@ -2123,9 +2129,12 @@ void cdns3_ep_config(struct cdns3_endpoint *priv_ep)
cdns3_select_ep(priv_dev, bEndpointAddress);
writel(ep_cfg, &priv_dev->regs->ep_cfg);
priv_ep->flags |= EP_CONFIGURED;
dev_dbg(priv_dev->dev, "Configure %s: with val %08x\n",
priv_ep->name, ep_cfg);
return 0;
}
/* Find correct direction for HW endpoint according to description */
@ -2266,7 +2275,7 @@ static int cdns3_gadget_ep_enable(struct usb_ep *ep,
u32 bEndpointAddress;
unsigned long flags;
int enable = 1;
int ret;
int ret = 0;
int val;
priv_ep = ep_to_cdns3_ep(ep);
@ -2305,6 +2314,17 @@ static int cdns3_gadget_ep_enable(struct usb_ep *ep,
bEndpointAddress = priv_ep->num | priv_ep->dir;
cdns3_select_ep(priv_dev, bEndpointAddress);
/*
* For some versions of controller at some point during ISO OUT traffic
* DMA reads Transfer Ring for the EP which has never got doorbell.
* This issue was detected only on simulation, but to avoid this issue
* driver add protection against it. To fix it driver enable ISO OUT
* endpoint before setting DRBL. This special treatment of ISO OUT
* endpoints are recommended by controller specification.
*/
if (priv_ep->type == USB_ENDPOINT_XFER_ISOC && !priv_ep->dir)
enable = 0;
if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) {
/*
* Enable stream support (SS mode) related interrupts
@ -2315,13 +2335,17 @@ static int cdns3_gadget_ep_enable(struct usb_ep *ep,
EP_STS_EN_SIDERREN | EP_STS_EN_MD_EXITEN |
EP_STS_EN_STREAMREN;
priv_ep->use_streams = true;
cdns3_stream_ep_reconfig(priv_dev, priv_ep);
ret = cdns3_ep_config(priv_ep, enable);
priv_dev->using_streams |= true;
}
} else {
ret = cdns3_ep_config(priv_ep, enable);
}
ret = cdns3_allocate_trb_pool(priv_ep);
if (ret)
goto exit;
ret = cdns3_allocate_trb_pool(priv_ep);
if (ret)
goto exit;
@ -2351,20 +2375,6 @@ static int cdns3_gadget_ep_enable(struct usb_ep *ep,
writel(reg, &priv_dev->regs->ep_sts_en);
/*
* For some versions of controller at some point during ISO OUT traffic
* DMA reads Transfer Ring for the EP which has never got doorbell.
* This issue was detected only on simulation, but to avoid this issue
* driver add protection against it. To fix it driver enable ISO OUT
* endpoint before setting DRBL. This special treatment of ISO OUT
* endpoints are recommended by controller specification.
*/
if (priv_ep->type == USB_ENDPOINT_XFER_ISOC && !priv_ep->dir)
enable = 0;
if (enable)
cdns3_set_register_bit(&priv_dev->regs->ep_cfg, EP_CFG_ENABLE);
ep->desc = desc;
priv_ep->flags &= ~(EP_PENDING_REQUEST | EP_STALLED | EP_STALL_PENDING |
EP_QUIRK_ISO_OUT_EN | EP_QUIRK_EXTRA_BUF_EN);
@ -3265,10 +3275,13 @@ static int __cdns3_gadget_init(struct cdns3 *cdns)
}
static int cdns3_gadget_suspend(struct cdns3 *cdns, bool do_wakeup)
__must_hold(&cdns->lock)
{
struct cdns3_device *priv_dev = cdns->gadget_dev;
spin_unlock(&cdns->lock);
cdns3_disconnect_gadget(priv_dev);
spin_lock(&cdns->lock);
priv_dev->gadget.speed = USB_SPEED_UNKNOWN;
usb_gadget_set_state(&priv_dev->gadget, USB_STATE_NOTATTACHED);

5
drivers/usb/cdns3/gadget.h
View file

@ -1072,7 +1072,7 @@ struct cdns3_trb {
#define TRB_TDL_SS_SIZE_GET(p) (((p) & GENMASK(23, 17)) >> 17)
/* transfer_len bitmasks - bits 31:24 */
#define TRB_BURST_LEN(p) (((p) << 24) & GENMASK(31, 24))
#define TRB_BURST_LEN(p) ((unsigned int)((p) << 24) & GENMASK(31, 24))
#define TRB_BURST_LEN_GET(p) (((p) & GENMASK(31, 24)) >> 24)
/* Data buffer pointer bitmasks*/
@ -1159,6 +1159,7 @@ struct cdns3_endpoint {
#define EP_QUIRK_EXTRA_BUF_DET BIT(12)
#define EP_QUIRK_EXTRA_BUF_EN BIT(13)
#define EP_TDLCHK_EN BIT(15)
#define EP_CONFIGURED BIT(16)
u32 flags;
struct cdns3_request *descmis_req;
@ -1360,7 +1361,7 @@ void cdns3_gadget_giveback(struct cdns3_endpoint *priv_ep,
int cdns3_init_ep0(struct cdns3_device *priv_dev,
struct cdns3_endpoint *priv_ep);
void cdns3_ep0_config(struct cdns3_device *priv_dev);
void cdns3_ep_config(struct cdns3_endpoint *priv_ep);
int cdns3_ep_config(struct cdns3_endpoint *priv_ep, bool enable);
void cdns3_check_ep0_interrupt_proceed(struct cdns3_device *priv_dev, int dir);
int __cdns3_gadget_wakeup(struct cdns3_device *priv_dev);