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authorAndiry Xu <andiry.xu@amd.com>2012-03-05 17:49:32 +0800
committerSarah Sharp <sarah.a.sharp@linux.intel.com>2012-03-12 16:50:24 -0700
commit3b72fca09d7aed0c1a390370eb3f3f4f0480702a (patch)
tree3e1de71e220ed585fd85b1b2002652c96c760b04 /drivers/usb/host/xhci-ring.c
parent8d3709f3dd41769338cc383bec23673fd1ce34e7 (diff)
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>
Diffstat (limited to 'drivers/usb/host/xhci-ring.c')
-rw-r--r--drivers/usb/host/xhci-ring.c118
1 files changed, 59 insertions, 59 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 9e71f7c46a85..ad68a28d8fe6 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -143,7 +143,7 @@ static void next_trb(struct xhci_hcd *xhci,
* See Cycle bit rules. SW is the consumer for the event ring only.
* Don't make a ring full of link TRBs. That would be dumb and this would loop.
*/
-static void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring, bool consumer)
+static void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring)
{
union xhci_trb *next = ++(ring->dequeue);
unsigned long long addr;
@@ -153,7 +153,8 @@ static void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring, bool consumer
* the end of an event ring segment (which doesn't have link TRBS)
*/
while (last_trb(xhci, ring, ring->deq_seg, next)) {
- if (consumer && last_trb_on_last_seg(xhci, ring, ring->deq_seg, next)) {
+ if (ring->type == TYPE_EVENT && last_trb_on_last_seg(xhci,
+ ring, ring->deq_seg, next)) {
ring->cycle_state = (ring->cycle_state ? 0 : 1);
}
ring->deq_seg = ring->deq_seg->next;
@@ -181,7 +182,7 @@ static void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring, bool consumer
* prepare_transfer()?
*/
static void inc_enq(struct xhci_hcd *xhci, struct xhci_ring *ring,
- bool consumer, bool more_trbs_coming, bool isoc)
+ bool more_trbs_coming)
{
u32 chain;
union xhci_trb *next;
@@ -195,35 +196,35 @@ static void inc_enq(struct xhci_hcd *xhci, struct xhci_ring *ring,
* the end of an event ring segment (which doesn't have link TRBS)
*/
while (last_trb(xhci, ring, ring->enq_seg, next)) {
- if (!consumer) {
- if (ring != xhci->event_ring) {
- /*
- * If the caller doesn't plan on enqueueing more
- * TDs before ringing the doorbell, then we
- * don't want to give the link TRB to the
- * hardware just yet. We'll give the link TRB
- * back in prepare_ring() just before we enqueue
- * the TD at the top of the ring.
- */
- if (!chain && !more_trbs_coming)
- break;
+ if (ring->type != TYPE_EVENT) {
+ /*
+ * If the caller doesn't plan on enqueueing more
+ * TDs before ringing the doorbell, then we
+ * don't want to give the link TRB to the
+ * hardware just yet. We'll give the link TRB
+ * back in prepare_ring() just before we enqueue
+ * the TD at the top of the ring.
+ */
+ if (!chain && !more_trbs_coming)
+ break;
- /* If we're not dealing with 0.95 hardware or
- * isoc rings on AMD 0.96 host,
- * carry over the chain bit of the previous TRB
- * (which may mean the chain bit is cleared).
- */
- if (!(isoc && (xhci->quirks & XHCI_AMD_0x96_HOST))
+ /* If we're not dealing with 0.95 hardware or
+ * isoc rings on AMD 0.96 host,
+ * carry over the chain bit of the previous TRB
+ * (which may mean the chain bit is cleared).
+ */
+ if (!(ring->type == TYPE_ISOC &&
+ (xhci->quirks & XHCI_AMD_0x96_HOST))
&& !xhci_link_trb_quirk(xhci)) {
- next->link.control &=
- cpu_to_le32(~TRB_CHAIN);
- next->link.control |=
- cpu_to_le32(chain);
- }
- /* Give this link TRB to the hardware */
- wmb();
- next->link.control ^= cpu_to_le32(TRB_CYCLE);
+ next->link.control &=
+ cpu_to_le32(~TRB_CHAIN);
+ next->link.control |=
+ cpu_to_le32(chain);
}
+ /* Give this link TRB to the hardware */
+ wmb();
+ next->link.control ^= cpu_to_le32(TRB_CYCLE);
+
/* Toggle the cycle bit after the last ring segment. */
if (last_trb_on_last_seg(xhci, ring, ring->enq_seg, next)) {
ring->cycle_state = (ring->cycle_state ? 0 : 1);
@@ -1185,7 +1186,7 @@ bandwidth_change:
xhci->error_bitmask |= 1 << 6;
break;
}
- inc_deq(xhci, xhci->cmd_ring, false);
+ inc_deq(xhci, xhci->cmd_ring);
}
static void handle_vendor_event(struct xhci_hcd *xhci,
@@ -1398,7 +1399,7 @@ static void handle_port_status(struct xhci_hcd *xhci,
cleanup:
/* Update event ring dequeue pointer before dropping the lock */
- inc_deq(xhci, xhci->event_ring, true);
+ inc_deq(xhci, xhci->event_ring);
/* Don't make the USB core poll the roothub if we got a bad port status
* change event. Besides, at that point we can't tell which roothub
@@ -1593,8 +1594,8 @@ static int finish_td(struct xhci_hcd *xhci, struct xhci_td *td,
} else {
/* Update ring dequeue pointer */
while (ep_ring->dequeue != td->last_trb)
- inc_deq(xhci, ep_ring, false);
- inc_deq(xhci, ep_ring, false);
+ inc_deq(xhci, ep_ring);
+ inc_deq(xhci, ep_ring);
}
td_cleanup:
@@ -1842,8 +1843,8 @@ static int skip_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td,
/* Update ring dequeue pointer */
while (ep_ring->dequeue != td->last_trb)
- inc_deq(xhci, ep_ring, false);
- inc_deq(xhci, ep_ring, false);
+ inc_deq(xhci, ep_ring);
+ inc_deq(xhci, ep_ring);
return finish_td(xhci, td, NULL, event, ep, status, true);
}
@@ -2230,7 +2231,7 @@ cleanup:
* Will roll back to continue process missed tds.
*/
if (trb_comp_code == COMP_MISSED_INT || !ep->skip) {
- inc_deq(xhci, xhci->event_ring, true);
+ inc_deq(xhci, xhci->event_ring);
}
if (ret) {
@@ -2345,7 +2346,7 @@ static int xhci_handle_event(struct xhci_hcd *xhci)
if (update_ptrs)
/* Update SW event ring dequeue pointer */
- inc_deq(xhci, xhci->event_ring, true);
+ inc_deq(xhci, xhci->event_ring);
/* Are there more items on the event ring? Caller will call us again to
* check.
@@ -2461,7 +2462,7 @@ irqreturn_t xhci_msi_irq(int irq, struct usb_hcd *hcd)
* prepare_transfer()?
*/
static void queue_trb(struct xhci_hcd *xhci, struct xhci_ring *ring,
- bool consumer, bool more_trbs_coming, bool isoc,
+ bool more_trbs_coming,
u32 field1, u32 field2, u32 field3, u32 field4)
{
struct xhci_generic_trb *trb;
@@ -2471,7 +2472,7 @@ static void queue_trb(struct xhci_hcd *xhci, struct xhci_ring *ring,
trb->field[1] = cpu_to_le32(field2);
trb->field[2] = cpu_to_le32(field3);
trb->field[3] = cpu_to_le32(field4);
- inc_enq(xhci, ring, consumer, more_trbs_coming, isoc);
+ inc_enq(xhci, ring, more_trbs_coming);
}
/*
@@ -2479,7 +2480,7 @@ static void queue_trb(struct xhci_hcd *xhci, struct xhci_ring *ring,
* FIXME allocate segments if the ring is full.
*/
static int prepare_ring(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
- u32 ep_state, unsigned int num_trbs, bool isoc, gfp_t mem_flags)
+ u32 ep_state, unsigned int num_trbs, gfp_t mem_flags)
{
/* Make sure the endpoint has been added to xHC schedule */
switch (ep_state) {
@@ -2524,8 +2525,9 @@ static int prepare_ring(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
/* If we're not dealing with 0.95 hardware or isoc rings
* on AMD 0.96 host, clear the chain bit.
*/
- if (!xhci_link_trb_quirk(xhci) && !(isoc &&
- (xhci->quirks & XHCI_AMD_0x96_HOST)))
+ if (!xhci_link_trb_quirk(xhci) &&
+ !(ring->type == TYPE_ISOC &&
+ (xhci->quirks & XHCI_AMD_0x96_HOST)))
next->link.control &= cpu_to_le32(~TRB_CHAIN);
else
next->link.control |= cpu_to_le32(TRB_CHAIN);
@@ -2553,7 +2555,6 @@ static int prepare_transfer(struct xhci_hcd *xhci,
unsigned int num_trbs,
struct urb *urb,
unsigned int td_index,
- bool isoc,
gfp_t mem_flags)
{
int ret;
@@ -2571,7 +2572,7 @@ static int prepare_transfer(struct xhci_hcd *xhci,
ret = prepare_ring(xhci, ep_ring,
le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK,
- num_trbs, isoc, mem_flags);
+ num_trbs, mem_flags);
if (ret)
return ret;
@@ -2781,7 +2782,7 @@ static int queue_bulk_sg_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
trb_buff_len = prepare_transfer(xhci, xhci->devs[slot_id],
ep_index, urb->stream_id,
- num_trbs, urb, 0, false, mem_flags);
+ num_trbs, urb, 0, mem_flags);
if (trb_buff_len < 0)
return trb_buff_len;
@@ -2869,7 +2870,7 @@ static int queue_bulk_sg_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
more_trbs_coming = true;
else
more_trbs_coming = false;
- queue_trb(xhci, ep_ring, false, more_trbs_coming, false,
+ queue_trb(xhci, ep_ring, more_trbs_coming,
lower_32_bits(addr),
upper_32_bits(addr),
length_field,
@@ -2951,7 +2952,7 @@ int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
ret = prepare_transfer(xhci, xhci->devs[slot_id],
ep_index, urb->stream_id,
- num_trbs, urb, 0, false, mem_flags);
+ num_trbs, urb, 0, mem_flags);
if (ret < 0)
return ret;
@@ -3023,7 +3024,7 @@ int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
more_trbs_coming = true;
else
more_trbs_coming = false;
- queue_trb(xhci, ep_ring, false, more_trbs_coming, false,
+ queue_trb(xhci, ep_ring, more_trbs_coming,
lower_32_bits(addr),
upper_32_bits(addr),
length_field,
@@ -3080,7 +3081,7 @@ int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
num_trbs++;
ret = prepare_transfer(xhci, xhci->devs[slot_id],
ep_index, urb->stream_id,
- num_trbs, urb, 0, false, mem_flags);
+ num_trbs, urb, 0, mem_flags);
if (ret < 0)
return ret;
@@ -3113,7 +3114,7 @@ int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
}
}
- queue_trb(xhci, ep_ring, false, true, false,
+ queue_trb(xhci, ep_ring, true,
setup->bRequestType | setup->bRequest << 8 | le16_to_cpu(setup->wValue) << 16,
le16_to_cpu(setup->wIndex) | le16_to_cpu(setup->wLength) << 16,
TRB_LEN(8) | TRB_INTR_TARGET(0),
@@ -3133,7 +3134,7 @@ int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
if (urb->transfer_buffer_length > 0) {
if (setup->bRequestType & USB_DIR_IN)
field |= TRB_DIR_IN;
- queue_trb(xhci, ep_ring, false, true, false,
+ queue_trb(xhci, ep_ring, true,
lower_32_bits(urb->transfer_dma),
upper_32_bits(urb->transfer_dma),
length_field,
@@ -3149,7 +3150,7 @@ int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
field = 0;
else
field = TRB_DIR_IN;
- queue_trb(xhci, ep_ring, false, false, false,
+ queue_trb(xhci, ep_ring, false,
0,
0,
TRB_INTR_TARGET(0),
@@ -3289,8 +3290,7 @@ static int xhci_queue_isoc_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
trbs_per_td = count_isoc_trbs_needed(xhci, urb, i);
ret = prepare_transfer(xhci, xhci->devs[slot_id], ep_index,
- urb->stream_id, trbs_per_td, urb, i, true,
- mem_flags);
+ urb->stream_id, trbs_per_td, urb, i, mem_flags);
if (ret < 0) {
if (i == 0)
return ret;
@@ -3360,7 +3360,7 @@ static int xhci_queue_isoc_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
remainder |
TRB_INTR_TARGET(0);
- queue_trb(xhci, ep_ring, false, more_trbs_coming, true,
+ queue_trb(xhci, ep_ring, more_trbs_coming,
lower_32_bits(addr),
upper_32_bits(addr),
length_field,
@@ -3443,7 +3443,7 @@ int xhci_queue_isoc_tx_prepare(struct xhci_hcd *xhci, gfp_t mem_flags,
* Do not insert any td of the urb to the ring if the check failed.
*/
ret = prepare_ring(xhci, ep_ring, le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK,
- num_trbs, true, mem_flags);
+ num_trbs, mem_flags);
if (ret)
return ret;
@@ -3502,7 +3502,7 @@ static int queue_command(struct xhci_hcd *xhci, u32 field1, u32 field2,
reserved_trbs++;
ret = prepare_ring(xhci, xhci->cmd_ring, EP_STATE_RUNNING,
- reserved_trbs, false, GFP_ATOMIC);
+ reserved_trbs, GFP_ATOMIC);
if (ret < 0) {
xhci_err(xhci, "ERR: No room for command on command ring\n");
if (command_must_succeed)
@@ -3510,8 +3510,8 @@ static int queue_command(struct xhci_hcd *xhci, u32 field1, u32 field2,
"unfailable commands failed.\n");
return ret;
}
- queue_trb(xhci, xhci->cmd_ring, false, false, false, field1, field2,
- field3, field4 | xhci->cmd_ring->cycle_state);
+ queue_trb(xhci, xhci->cmd_ring, false, field1, field2, field3,
+ field4 | xhci->cmd_ring->cycle_state);
return 0;
}