static struct tb_ring *tb_ring_alloc(struct tb_nhi *nhi, u32 hop, int size,
bool transmit, unsigned int flags,
- u16 sof_mask, u16 eof_mask,
+ int e2e_tx_hop, u16 sof_mask, u16 eof_mask,
void (*start_poll)(void *),
void *poll_data)
{
ring->is_tx = transmit;
ring->size = size;
ring->flags = flags;
+ ring->e2e_tx_hop = e2e_tx_hop;
ring->sof_mask = sof_mask;
ring->eof_mask = eof_mask;
ring->head = 0;
struct tb_ring *tb_ring_alloc_tx(struct tb_nhi *nhi, int hop, int size,
unsigned int flags)
{
- return tb_ring_alloc(nhi, hop, size, true, flags, 0, 0, NULL, NULL);
+ return tb_ring_alloc(nhi, hop, size, true, flags, 0, 0, 0, NULL, NULL);
}
EXPORT_SYMBOL_GPL(tb_ring_alloc_tx);
* @hop: HopID (ring) to allocate. Pass %-1 for automatic allocation.
* @size: Number of entries in the ring
* @flags: Flags for the ring
+ * @e2e_tx_hop: Transmit HopID when E2E is enabled in @flags
* @sof_mask: Mask of PDF values that start a frame
* @eof_mask: Mask of PDF values that end a frame
* @start_poll: If not %NULL the ring will call this function when an
* @poll_data: Optional data passed to @start_poll
*/
struct tb_ring *tb_ring_alloc_rx(struct tb_nhi *nhi, int hop, int size,
- unsigned int flags, u16 sof_mask, u16 eof_mask,
+ unsigned int flags, int e2e_tx_hop,
+ u16 sof_mask, u16 eof_mask,
void (*start_poll)(void *), void *poll_data)
{
- return tb_ring_alloc(nhi, hop, size, false, flags, sof_mask, eof_mask,
+ return tb_ring_alloc(nhi, hop, size, false, flags, e2e_tx_hop, sof_mask, eof_mask,
start_poll, poll_data);
}
EXPORT_SYMBOL_GPL(tb_ring_alloc_rx);
ring_iowrite32options(ring, sof_eof_mask, 4);
ring_iowrite32options(ring, flags, 0);
}
+
+ /*
+ * Now that the ring valid bit is set we can configure E2E if
+ * enabled for the ring.
+ */
+ if (ring->flags & RING_FLAG_E2E) {
+ if (!ring->is_tx) {
+ u32 hop;
+
+ hop = ring->e2e_tx_hop << REG_RX_OPTIONS_E2E_HOP_SHIFT;
+ hop &= REG_RX_OPTIONS_E2E_HOP_MASK;
+ flags |= hop;
+
+ dev_dbg(&ring->nhi->pdev->dev,
+ "enabling E2E for %s %d with TX HopID %d\n",
+ RING_TYPE(ring), ring->hop, ring->e2e_tx_hop);
+ } else {
+ dev_dbg(&ring->nhi->pdev->dev, "enabling E2E for %s %d\n",
+ RING_TYPE(ring), ring->hop);
+ }
+
+ flags |= RING_FLAG_E2E_FLOW_CONTROL;
+ ring_iowrite32options(ring, flags, 0);
+ }
+
ring_interrupt_active(ring, true);
ring->running = true;
err:
* @irq: MSI-X irq number if the ring uses MSI-X. %0 otherwise.
* @vector: MSI-X vector number the ring uses (only set if @irq is > 0)
* @flags: Ring specific flags
+ * @e2e_tx_hop: Transmit HopID when E2E is enabled. Only applicable to
+ * RX ring. For TX ring this should be set to %0.
* @sof_mask: Bit mask used to detect start of frame PDF
* @eof_mask: Bit mask used to detect end of frame PDF
* @start_poll: Called when ring interrupt is triggered to start
int irq;
u8 vector;
unsigned int flags;
+ int e2e_tx_hop;
u16 sof_mask;
u16 eof_mask;
void (*start_poll)(void *data);
#define RING_FLAG_NO_SUSPEND BIT(0)
/* Configure the ring to be in frame mode */
#define RING_FLAG_FRAME BIT(1)
+/* Enable end-to-end flow control */
+#define RING_FLAG_E2E BIT(2)
struct ring_frame;
typedef void (*ring_cb)(struct tb_ring *, struct ring_frame *, bool canceled);
struct tb_ring *tb_ring_alloc_tx(struct tb_nhi *nhi, int hop, int size,
unsigned int flags);
struct tb_ring *tb_ring_alloc_rx(struct tb_nhi *nhi, int hop, int size,
- unsigned int flags, u16 sof_mask, u16 eof_mask,
+ unsigned int flags, int e2e_tx_hop,
+ u16 sof_mask, u16 eof_mask,
void (*start_poll)(void *), void *poll_data);
void tb_ring_start(struct tb_ring *ring);
void tb_ring_stop(struct tb_ring *ring);