In order to support runtime timeslot route changes, enable the
channel timeslot entries at channel start() and disable them at
channel stop().
Signed-off-by: Herve Codina
Reviewed-by: Christophe Leroy
---
drivers/soc/fsl/qe/qmc.c | 175 ---
1 file changed, 163 insertions(+), 12 deletions(-)
diff --git a/drivers/soc/fsl/qe/qmc.c b/drivers/soc/fsl/qe/qmc.c
index e651b3bba1ca..e56aea5803bf 100644
--- a/drivers/soc/fsl/qe/qmc.c
+++ b/drivers/soc/fsl/qe/qmc.c
@@ -177,6 +177,7 @@ struct qmc_chan {
struct qmc *qmc;
void __iomem *s_param;
enum qmc_mode mode;
+ spinlock_t ts_lock; /* Protect timeslots */
u64 tx_ts_mask_avail;
u64 tx_ts_mask;
u64 rx_ts_mask_avail;
@@ -265,6 +266,7 @@ static void qmc_setbits32(void __iomem *addr, u32 set)
int qmc_chan_get_info(struct qmc_chan *chan, struct qmc_chan_info *info)
{
struct tsa_serial_info tsa_info;
+ unsigned long flags;
int ret;
/* Retrieve info from the TSA related serial */
@@ -272,6 +274,8 @@ int qmc_chan_get_info(struct qmc_chan *chan, struct
qmc_chan_info *info)
if (ret)
return ret;
+ spin_lock_irqsave(>ts_lock, flags);
+
info->mode = chan->mode;
info->rx_fs_rate = tsa_info.rx_fs_rate;
info->rx_bit_rate = tsa_info.rx_bit_rate;
@@ -280,6 +284,8 @@ int qmc_chan_get_info(struct qmc_chan *chan, struct
qmc_chan_info *info)
info->tx_bit_rate = tsa_info.tx_bit_rate;
info->nb_rx_ts = hweight64(chan->rx_ts_mask);
+ spin_unlock_irqrestore(>ts_lock, flags);
+
return 0;
}
EXPORT_SYMBOL(qmc_chan_get_info);
@@ -683,6 +689,40 @@ static int qmc_chan_setup_tsa_32tx(struct qmc_chan *chan,
const struct tsa_seria
return 0;
}
+static int qmc_chan_setup_tsa_tx(struct qmc_chan *chan, bool enable)
+{
+ struct tsa_serial_info info;
+ int ret;
+
+ /* Retrieve info from the TSA related serial */
+ ret = tsa_serial_get_info(chan->qmc->tsa_serial, );
+ if (ret)
+ return ret;
+
+ /* Setup entries */
+ if (chan->qmc->is_tsa_64rxtx)
+ return qmc_chan_setup_tsa_64rxtx(chan, , enable);
+
+ return qmc_chan_setup_tsa_32tx(chan, , enable);
+}
+
+static int qmc_chan_setup_tsa_rx(struct qmc_chan *chan, bool enable)
+{
+ struct tsa_serial_info info;
+ int ret;
+
+ /* Retrieve info from the TSA related serial */
+ ret = tsa_serial_get_info(chan->qmc->tsa_serial, );
+ if (ret)
+ return ret;
+
+ /* Setup entries */
+ if (chan->qmc->is_tsa_64rxtx)
+ return qmc_chan_setup_tsa_64rxtx(chan, , enable);
+
+ return qmc_chan_setup_tsa_32rx(chan, , enable);
+}
+
static int qmc_chan_setup_tsa(struct qmc_chan *chan, bool enable)
{
struct tsa_serial_info info;
@@ -719,6 +759,12 @@ static int qmc_chan_stop_rx(struct qmc_chan *chan)
spin_lock_irqsave(>rx_lock, flags);
+ if (chan->is_rx_stopped) {
+ /* The channel is already stopped -> simply return ok */
+ ret = 0;
+ goto end;
+ }
+
/* Send STOP RECEIVE command */
ret = qmc_chan_command(chan, 0x0);
if (ret) {
@@ -729,6 +775,15 @@ static int qmc_chan_stop_rx(struct qmc_chan *chan)
chan->is_rx_stopped = true;
+ if (!chan->qmc->is_tsa_64rxtx || chan->is_tx_stopped) {
+ ret = qmc_chan_setup_tsa_rx(chan, false);
+ if (ret) {
+ dev_err(chan->qmc->dev, "chan %u: Disable tsa entries
failed (%d)\n",
+ chan->id, ret);
+ goto end;
+ }
+ }
+
end:
spin_unlock_irqrestore(>rx_lock, flags);
return ret;
@@ -741,6 +796,12 @@ static int qmc_chan_stop_tx(struct qmc_chan *chan)
spin_lock_irqsave(>tx_lock, flags);
+ if (chan->is_tx_stopped) {
+ /* The channel is already stopped -> simply return ok */
+ ret = 0;
+ goto end;
+ }
+
/* Send STOP TRANSMIT command */
ret = qmc_chan_command(chan, 0x1);
if (ret) {
@@ -751,37 +812,82 @@ static int qmc_chan_stop_tx(struct qmc_chan *chan)
chan->is_tx_stopped = true;
+ if (!chan->qmc->is_tsa_64rxtx || chan->is_rx_stopped) {
+ ret = qmc_chan_setup_tsa_tx(chan, false);
+ if (ret) {
+ dev_err(chan->qmc->dev, "chan %u: Disable tsa entries
failed (%d)\n",
+ chan->id, ret);
+ goto end;
+ }
+ }
+
end:
spin_unlock_irqrestore(>tx_lock, flags);
return ret;
}
+static int qmc_chan_start_rx(struct qmc_chan *chan);
+
int qmc_chan_stop(struct qmc_chan *chan, int direction)
{
- int ret;
+ bool is_rx_rollback_needed = false;
+ unsigned long flags;
+
