It needs to use request->num_mapped_sgs to indicate mapped sg number,
the request->num_sgs is the sg number before the mapping. These two
entries have different values for the platforms which iommu or
swiotlb is used. Besides, it needs to use correct sg APIs for
mapped sg list for TRB assignment.
Signed-off-by: Peter Chen <peter.chen@xxxxxxx>
---
drivers/usb/cdns3/gadget.c | 23 +++++++++++++++--------
1 file changed, 15 insertions(+), 8 deletions(-)
diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c
index 2ea4d30e1828..50282cab5fb6 100644
--- a/drivers/usb/cdns3/gadget.c
+++ b/drivers/usb/cdns3/gadget.c
@@ -1098,11 +1098,13 @@ static int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
u32 control;
int pcs;
u16 total_tdl = 0;
+ struct scatterlist *s = NULL;
+ bool sg_supported = !!(request->num_mapped_sgs);
if (priv_ep->type == USB_ENDPOINT_XFER_ISOC)
num_trb = priv_ep->interval;
else
- num_trb = request->num_sgs ? request->num_sgs : 1;
+ num_trb = sg_supported ? request->num_mapped_sgs : 1;
if (num_trb > priv_ep->free_trbs) {
priv_ep->flags |= EP_RING_FULL;
@@ -1162,22 +1164,24 @@ static int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
if (priv_dev->dev_ver <= DEV_VER_V2)
togle_pcs = cdns3_wa1_update_guard(priv_ep, trb);
+ if (sg_supported)
+ s = request->sg;
+
/* set incorrect Cycle Bit for first trb*/
control = priv_ep->pcs ? 0 : TRB_CYCLE;
-
do {
u32 length;
u16 td_size = 0;
/* fill TRB */
control |= TRB_TYPE(TRB_NORMAL);
- trb->buffer = cpu_to_le32(TRB_BUFFER(request->num_sgs == 0
- ? trb_dma : request->sg[sg_iter].dma_address));
-
- if (likely(!request->num_sgs))
+ if (sg_supported) {
+ trb->buffer = cpu_to_le32(TRB_BUFFER(sg_dma_address(s)));
+ length = sg_dma_len(s);
+ } else {
+ trb->buffer = cpu_to_le32(TRB_BUFFER(trb_dma));
length = request->length;
- else
- length = request->sg[sg_iter].length;
+ }
if (likely(priv_dev->dev_ver >= DEV_VER_V2))
td_size = DIV_ROUND_UP(length,
@@ -1215,6 +1219,9 @@ static int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
else
priv_req->trb->control = cpu_to_le32(control);
+ if (sg_supported)
+ s = sg_next(s);
+
control = 0;
++sg_iter;
priv_req->end_trb = priv_ep->enqueue;
--
2.17.1
