xHCI: store ring's type
When allocate a ring, store its type - four transfer types for endpoint,
TYPE_STREAM for stream transfer, and TYPE_COMMAND/TYPE_EVENT for xHCI host.
This helps to get rid of three bool function parameters: link_trbs, isoc
and consumer.
Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Tested-by: Paul Zimmerman <Paul.Zimmerman@synopsys.com>
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 8339d82..1699df9 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -73,14 +73,14 @@
* related flags, such as End TRB, Toggle Cycle, and no snoop.
*/
static void xhci_link_segments(struct xhci_hcd *xhci, struct xhci_segment *prev,
- struct xhci_segment *next, bool link_trbs, bool isoc)
+ struct xhci_segment *next, enum xhci_ring_type type)
{
u32 val;
if (!prev || !next)
return;
prev->next = next;
- if (link_trbs) {
+ if (type != TYPE_EVENT) {
prev->trbs[TRBS_PER_SEGMENT-1].link.segment_ptr =
cpu_to_le64(next->dma);
@@ -91,7 +91,8 @@
/* Always set the chain bit with 0.95 hardware */
/* Set chain bit for isoc rings on AMD 0.96 host */
if (xhci_link_trb_quirk(xhci) ||
- (isoc && (xhci->quirks & XHCI_AMD_0x96_HOST)))
+ (type == TYPE_ISOC &&
+ (xhci->quirks & XHCI_AMD_0x96_HOST)))
val |= TRB_CHAIN;
prev->trbs[TRBS_PER_SEGMENT-1].link.control = cpu_to_le32(val);
}
@@ -144,7 +145,7 @@
* See section 4.9.1 and figures 15 and 16.
*/
static struct xhci_ring *xhci_ring_alloc(struct xhci_hcd *xhci,
- unsigned int num_segs, bool link_trbs, bool isoc, gfp_t flags)
+ unsigned int num_segs, enum xhci_ring_type type, gfp_t flags)
{
struct xhci_ring *ring;
struct xhci_segment *prev;
@@ -154,6 +155,7 @@
return NULL;
INIT_LIST_HEAD(&ring->td_list);
+ ring->type = type;
if (num_segs == 0)
return ring;
@@ -169,14 +171,15 @@
next = xhci_segment_alloc(xhci, flags);
if (!next)
goto fail;
- xhci_link_segments(xhci, prev, next, link_trbs, isoc);
+ xhci_link_segments(xhci, prev, next, type);
prev = next;
num_segs--;
}
- xhci_link_segments(xhci, prev, ring->first_seg, link_trbs, isoc);
+ xhci_link_segments(xhci, prev, ring->first_seg, type);
- if (link_trbs) {
+ /* Only event ring does not use link TRB */
+ if (type != TYPE_EVENT) {
/* See section 4.9.2.1 and 6.4.4.1 */
prev->trbs[TRBS_PER_SEGMENT-1].link.control |=
cpu_to_le32(LINK_TOGGLE);
@@ -217,16 +220,17 @@
* pointers to the beginning of the ring.
*/
static void xhci_reinit_cached_ring(struct xhci_hcd *xhci,
- struct xhci_ring *ring, bool isoc)
+ struct xhci_ring *ring, enum xhci_ring_type type)
{
struct xhci_segment *seg = ring->first_seg;
do {
memset(seg->trbs, 0,
sizeof(union xhci_trb)*TRBS_PER_SEGMENT);
/* All endpoint rings have link TRBs */
- xhci_link_segments(xhci, seg, seg->next, 1, isoc);
+ xhci_link_segments(xhci, seg, seg->next, type);
seg = seg->next;
} while (seg != ring->first_seg);
+ ring->type = type;
xhci_initialize_ring_info(ring);
/* td list should be empty since all URBs have been cancelled,
* but just in case...
@@ -528,7 +532,7 @@
*/
for (cur_stream = 1; cur_stream < num_streams; cur_stream++) {
stream_info->stream_rings[cur_stream] =
- xhci_ring_alloc(xhci, 1, true, false, mem_flags);
+ xhci_ring_alloc(xhci, 1, TYPE_STREAM, mem_flags);
cur_ring = stream_info->stream_rings[cur_stream];
if (!cur_ring)
goto cleanup_rings;
@@ -862,7 +866,7 @@
}
/* Allocate endpoint 0 ring */
- dev->eps[0].ring = xhci_ring_alloc(xhci, 1, true, false, flags);
+ dev->eps[0].ring = xhci_ring_alloc(xhci, 1, TYPE_CTRL, flags);
if (!dev->eps[0].ring)
goto fail;
@@ -1300,11 +1304,13 @@
struct xhci_ring *ep_ring;
unsigned int max_packet;
unsigned int max_burst;
+ enum xhci_ring_type type;
u32 max_esit_payload;
ep_index = xhci_get_endpoint_index(&ep->desc);
ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index);
+ type = usb_endpoint_type(&ep->desc);
/* Set up the endpoint ring */
/*
* Isochronous endpoint ring needs bigger size because one isoc URB
@@ -1314,10 +1320,10 @@
*/
if (usb_endpoint_xfer_isoc(&ep->desc))
virt_dev->eps[ep_index].new_ring =
- xhci_ring_alloc(xhci, 8, true, true, mem_flags);
+ xhci_ring_alloc(xhci, 8, type, mem_flags);
else
virt_dev->eps[ep_index].new_ring =
- xhci_ring_alloc(xhci, 1, true, false, mem_flags);
+ xhci_ring_alloc(xhci, 1, type, mem_flags);
if (!virt_dev->eps[ep_index].new_ring) {
/* Attempt to use the ring cache */
if (virt_dev->num_rings_cached == 0)
@@ -1327,7 +1333,7 @@
virt_dev->ring_cache[virt_dev->num_rings_cached] = NULL;
virt_dev->num_rings_cached--;
xhci_reinit_cached_ring(xhci, virt_dev->eps[ep_index].new_ring,
- usb_endpoint_xfer_isoc(&ep->desc) ? true : false);
+ type);
}
virt_dev->eps[ep_index].skip = false;
ep_ring = virt_dev->eps[ep_index].new_ring;
@@ -2235,7 +2241,7 @@
goto fail;
/* Set up the command ring to have one segments for now. */
- xhci->cmd_ring = xhci_ring_alloc(xhci, 1, true, false, flags);
+ xhci->cmd_ring = xhci_ring_alloc(xhci, 1, TYPE_COMMAND, flags);
if (!xhci->cmd_ring)
goto fail;
xhci_dbg(xhci, "Allocated command ring at %p\n", xhci->cmd_ring);
@@ -2266,7 +2272,7 @@
* the event ring segment table (ERST). Section 4.9.3.
*/
xhci_dbg(xhci, "// Allocating event ring\n");
- xhci->event_ring = xhci_ring_alloc(xhci, ERST_NUM_SEGS, false, false,
+ xhci->event_ring = xhci_ring_alloc(xhci, ERST_NUM_SEGS, TYPE_EVENT,
flags);
if (!xhci->event_ring)
goto fail;