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xhci: add xhci_get_virt_ep() helper

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[commit b1adc42d440df3233255e313a45ab7e9b2b74096 upstream]

In several event handlers we need to find the right endpoint
structure from slot_id and ep_index in the event.

Add a helper for this, check that slot_id and ep_index are valid.

Cc: stable@vger.kernel.org
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20210129130044.206855-6-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Carsten Schmid <carsten_schmid@mentor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathias Nyman 2021-01-29 15:00:22 +02:00 committed by Greg Kroah-Hartman
parent 624290f368
commit ba28765d33
2 changed files with 47 additions and 14 deletions
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58
drivers/usb/host/xhci-ring.c
View File

@ -446,6 +446,26 @@ void xhci_ring_doorbell_for_active_rings(struct xhci_hcd *xhci,
ring_doorbell_for_active_rings(xhci, slot_id, ep_index);
}
static struct xhci_virt_ep *xhci_get_virt_ep(struct xhci_hcd *xhci,
unsigned int slot_id,
unsigned int ep_index)
{
if (slot_id == 0 || slot_id >= MAX_HC_SLOTS) {
xhci_warn(xhci, "Invalid slot_id %u\n", slot_id);
return NULL;
}
if (ep_index >= EP_CTX_PER_DEV) {
xhci_warn(xhci, "Invalid endpoint index %u\n", ep_index);
return NULL;
}
if (!xhci->devs[slot_id]) {
xhci_warn(xhci, "No xhci virt device for slot_id %u\n", slot_id);
return NULL;
}
return &xhci->devs[slot_id]->eps[ep_index];
}
/* Get the right ring for the given slot_id, ep_index and stream_id.
* If the endpoint supports streams, boundary check the URB's stream ID.
* If the endpoint doesn't support streams, return the singular endpoint ring.
@ -456,7 +476,10 @@ struct xhci_ring *xhci_triad_to_transfer_ring(struct xhci_hcd *xhci,
{
struct xhci_virt_ep *ep;
ep = &xhci->devs[slot_id]->eps[ep_index];
ep = xhci_get_virt_ep(xhci, slot_id, ep_index);
if (!ep)
return NULL;
/* Common case: no streams */
if (!(ep->ep_state & EP_HAS_STREAMS))
return ep->ring;
@ -747,11 +770,14 @@ static void xhci_handle_cmd_stop_ep(struct xhci_hcd *xhci, int slot_id,
memset(&deq_state, 0, sizeof(deq_state));
ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3]));
ep = xhci_get_virt_ep(xhci, slot_id, ep_index);
if (!ep)
return;
vdev = xhci->devs[slot_id];
ep_ctx = xhci_get_ep_ctx(xhci, vdev->out_ctx, ep_index);
trace_xhci_handle_cmd_stop_ep(ep_ctx);
ep = &xhci->devs[slot_id]->eps[ep_index];
last_unlinked_td = list_last_entry(&ep->cancelled_td_list,
struct xhci_td, cancelled_td_list);
@ -1076,9 +1102,11 @@ static void xhci_handle_cmd_set_deq(struct xhci_hcd *xhci, int slot_id,
ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3]));
stream_id = TRB_TO_STREAM_ID(le32_to_cpu(trb->generic.field[2]));
dev = xhci->devs[slot_id];
ep = &dev->eps[ep_index];
ep = xhci_get_virt_ep(xhci, slot_id, ep_index);
if (!ep)
return;
dev = xhci->devs[slot_id];
ep_ring = xhci_stream_id_to_ring(dev, ep_index, stream_id);
if (!ep_ring) {
xhci_warn(xhci, "WARN Set TR deq ptr command for freed stream ID %u\n",
@ -1151,9 +1179,9 @@ static void xhci_handle_cmd_set_deq(struct xhci_hcd *xhci, int slot_id,
}
cleanup:
dev->eps[ep_index].ep_state &= ~SET_DEQ_PENDING;
dev->eps[ep_index].queued_deq_seg = NULL;
dev->eps[ep_index].queued_deq_ptr = NULL;
ep->ep_state &= ~SET_DEQ_PENDING;
ep->queued_deq_seg = NULL;
ep->queued_deq_ptr = NULL;
/* Restart any rings with pending URBs */
ring_doorbell_for_active_rings(xhci, slot_id, ep_index);
}
@ -1162,10 +1190,15 @@ static void xhci_handle_cmd_reset_ep(struct xhci_hcd *xhci, int slot_id,
union xhci_trb *trb, u32 cmd_comp_code)
{
struct xhci_virt_device *vdev;
struct xhci_virt_ep *ep;
struct xhci_ep_ctx *ep_ctx;
unsigned int ep_index;
ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3]));
ep = xhci_get_virt_ep(xhci, slot_id, ep_index);
if (!ep)
return;
vdev = xhci->devs[slot_id];
ep_ctx = xhci_get_ep_ctx(xhci, vdev->out_ctx, ep_index);
trace_xhci_handle_cmd_reset_ep(ep_ctx);
@ -1195,7 +1228,7 @@ static void xhci_handle_cmd_reset_ep(struct xhci_hcd *xhci, int slot_id,
xhci_ring_cmd_db(xhci);
} else {
/* Clear our internal halted state */
xhci->devs[slot_id]->eps[ep_index].ep_state &= ~EP_HALTED;
ep->ep_state &= ~EP_HALTED;
}
/* if this was a soft reset, then restart */
@ -2364,14 +2397,13 @@ static int handle_tx_event(struct xhci_hcd *xhci,
trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len));
ep_trb_dma = le64_to_cpu(event->buffer);
xdev = xhci->devs[slot_id];
if (!xdev) {
xhci_err(xhci, "ERROR Transfer event pointed to bad slot %u\n",
slot_id);
ep = xhci_get_virt_ep(xhci, slot_id, ep_index);
if (!ep) {
xhci_err(xhci, "ERROR Invalid Transfer event\n");
goto err_out;
}
ep = &xdev->eps[ep_index];
xdev = xhci->devs[slot_id];
ep_ring = xhci_dma_to_transfer_ring(ep, ep_trb_dma);
ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index);

3
drivers/usb/host/xhci.h
View File

@ -993,6 +993,7 @@ struct xhci_interval_bw_table {
unsigned int ss_bw_out;
};
#define EP_CTX_PER_DEV 31
struct xhci_virt_device {
struct usb_device *udev;
@ -1007,7 +1008,7 @@ struct xhci_virt_device {
struct xhci_container_ctx *out_ctx;
/* Used for addressing devices and configuration changes */
struct xhci_container_ctx *in_ctx;
struct xhci_virt_ep eps[31];
struct xhci_virt_ep eps[EP_CTX_PER_DEV];
u8 fake_port;
u8 real_port;
struct xhci_interval_bw_table *bw_table;