diff options
| author | Gregory Herrero <gregory.herrero@intel.com> | 2015-11-20 11:49:31 +0100 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2015-12-15 09:12:41 -0600 |
| commit | 3b5fcc9ac2f4453a5609cc89ac7618b1b27ccb01 (patch) | |
| tree | 42d2dd094cb937f1bc8067cce2e4032a517c68aa /drivers/usb/dwc2/hcd_ddma.c | |
| parent | e23b8a54a440a2b8ee5c9dc3eb2099ecf813ef70 (diff) | |
usb: dwc2: host: use kmem cache to allocate descriptors
Kmem caches help to get correct boundary for descriptor buffers
which need to be 512 bytes aligned for dwc2 controller.
Two kmem caches are needed for generic descriptors and for
hs isochronous descriptors which doesn't have same size.
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/dwc2/hcd_ddma.c')
| -rw-r--r-- | drivers/usb/dwc2/hcd_ddma.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/drivers/usb/dwc2/hcd_ddma.c b/drivers/usb/dwc2/hcd_ddma.c index 85d7816d29f1..36606fc33c0d 100644 --- a/drivers/usb/dwc2/hcd_ddma.c +++ b/drivers/usb/dwc2/hcd_ddma.c @@ -87,10 +87,18 @@ static u16 dwc2_frame_incr_val(struct dwc2_qh *qh) static int dwc2_desc_list_alloc(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, gfp_t flags) { + struct kmem_cache *desc_cache; + + if (qh->ep_type == USB_ENDPOINT_XFER_ISOC + && qh->dev_speed == USB_SPEED_HIGH) + desc_cache = hsotg->desc_hsisoc_cache; + else + desc_cache = hsotg->desc_gen_cache; + qh->desc_list_sz = sizeof(struct dwc2_hcd_dma_desc) * dwc2_max_desc_num(qh); - qh->desc_list = kzalloc(qh->desc_list_sz, flags | GFP_DMA); + qh->desc_list = kmem_cache_zalloc(desc_cache, flags | GFP_DMA); if (!qh->desc_list) return -ENOMEM; @@ -113,10 +121,18 @@ static int dwc2_desc_list_alloc(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, static void dwc2_desc_list_free(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) { + struct kmem_cache *desc_cache; + + if (qh->ep_type == USB_ENDPOINT_XFER_ISOC + && qh->dev_speed == USB_SPEED_HIGH) + desc_cache = hsotg->desc_hsisoc_cache; + else + desc_cache = hsotg->desc_gen_cache; + if (qh->desc_list) { dma_unmap_single(hsotg->dev, qh->desc_list_dma, qh->desc_list_sz, DMA_FROM_DEVICE); - kfree(qh->desc_list); + kmem_cache_free(desc_cache, qh->desc_list); qh->desc_list = NULL; } |