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UPSTREAM: usb: dwc3: increase maximum number of TRBs per endpoint

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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.

Change-Id: I2591378bfa8e9c98804d52a1862509c91c4b00f5
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Wu Liang feng <wulf@rock-chips.com>
(cherry picked from commit 8495036e98)
This commit is contained in:
Felipe Balbi
2016-03-10 14:40:31 +02:00
committed by Huang, Tao
parent ad17e491a8
commit fc28417f8a
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/dwc3/core.h
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@@ -436,7 +436,7 @@ 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)
/**