previously we were using a maximum of 32 TRBs per
endpoint. With each TRB being 16 bytes long, we were
using 512 bytes of memory for each endpoint.
However, SLAB/SLUB will always allocate PAGE_SIZE
chunks. In order to better utilize the memory we
allocate and to allow deeper queues for gadgets
which would benefit from it (g_ether comes to mind),
let's increase the maximum to 256 TRBs which rounds
up to 4096 bytes for each endpoint.
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
---
drivers/usb/dwc3/core.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index e4f8b90d9627..bf05cca96941 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -435,7 +435,7 @@ struct dwc3_event_buffer {
#define DWC3_EP_DIRECTION_TX true
#define DWC3_EP_DIRECTION_RX false
-#define DWC3_TRB_NUM 32
+#define DWC3_TRB_NUM 256
#define DWC3_TRB_MASK (DWC3_TRB_NUM - 1)
/**
--
2.7.0.GIT
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