diff options
| author | Sanjay R Mehta <sanju.mehta@amd.com> | 2021-08-06 11:59:06 -0500 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2021-08-09 14:58:29 +0300 |
| commit | 7a1808f82a37d638ee6862175e8e5c5433fdd642 (patch) | |
| tree | 728567a76b066c7d4e181d86c37949804185ec3d /drivers/thunderbolt | |
| parent | e390909ac763589558ffb91856f121820f933e4b (diff) | |
thunderbolt: Handle ring interrupt by reading interrupt status register
As per USB4 specification by default "Disable ISR Auto-Clear" bit is set
to zero and the Tx/Rx ring interrupt status needs to be cleared.
Hence handle it by reading the interrupt status register (ISR) in the
MSI-X handler.
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt')
| -rw-r--r-- | drivers/thunderbolt/nhi.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/thunderbolt/nhi.c b/drivers/thunderbolt/nhi.c index c7a2841ed3b7..c73da0532be4 100644 --- a/drivers/thunderbolt/nhi.c +++ b/drivers/thunderbolt/nhi.c @@ -382,11 +382,24 @@ void tb_ring_poll_complete(struct tb_ring *ring) } EXPORT_SYMBOL_GPL(tb_ring_poll_complete); +static void ring_clear_msix(const struct tb_ring *ring) +{ + if (ring->nhi->quirks & QUIRK_AUTO_CLEAR_INT) + return; + + if (ring->is_tx) + ioread32(ring->nhi->iobase + REG_RING_NOTIFY_BASE); + else + ioread32(ring->nhi->iobase + REG_RING_NOTIFY_BASE + + 4 * (ring->nhi->hop_count / 32)); +} + static irqreturn_t ring_msix(int irq, void *data) { struct tb_ring *ring = data; spin_lock(&ring->nhi->lock); + ring_clear_msix(ring); spin_lock(&ring->lock); __ring_interrupt(ring); spin_unlock(&ring->lock); |