mirror of https://github.com/hak5/openwrt-owl.git
mpc85xx: revert the napi polling code to the one from an older kernel version to fix stability issues (#14020)
Signed-off-by: Felix Fietkau <nbd@openwrt.org> SVN-Revision: 38409owl
Felix Fietkau
parent
d75f9ca58a
commit
21fe2b7c5b
|
|
@ -0,0 +1,162 @@
|
||||||
|
--- a/drivers/net/ethernet/freescale/gianfar.c
|
||||||
|
+++ b/drivers/net/ethernet/freescale/gianfar.c
|
||||||
|
@@ -132,7 +132,7 @@ static int gfar_poll(struct napi_struct
|
||||||
|
static void gfar_netpoll(struct net_device *dev);
|
||||||
|
#endif
|
||||||
|
int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit);
|
||||||
|
-static void gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue);
|
||||||
|
+static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue);
|
||||||
|
static void gfar_process_frame(struct net_device *dev, struct sk_buff *skb,
|
||||||
|
int amount_pull, struct napi_struct *napi);
|
||||||
|
void gfar_halt(struct net_device *dev);
|
||||||
|
@@ -2475,7 +2475,7 @@ static void gfar_align_skb(struct sk_buf
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Interrupt Handler for Transmit complete */
|
||||||
|
-static void gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue)
|
||||||
|
+static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue)
|
||||||
|
{
|
||||||
|
struct net_device *dev = tx_queue->dev;
|
||||||
|
struct netdev_queue *txq;
|
||||||
|
@@ -2575,6 +2575,8 @@ static void gfar_clean_tx_ring(struct gf
|
||||||
|
tx_queue->dirty_tx = bdp;
|
||||||
|
|
||||||
|
netdev_tx_completed_queue(txq, howmany, bytes_sent);
|
||||||
|
+
|
||||||
|
+ return howmany;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void gfar_schedule_cleanup(struct gfar_priv_grp *gfargrp)
|
||||||
|
@@ -2833,82 +2835,62 @@ static int gfar_poll(struct napi_struct
|
||||||
|
struct gfar __iomem *regs = gfargrp->regs;
|
||||||
|
struct gfar_priv_tx_q *tx_queue = NULL;
|
||||||
|
struct gfar_priv_rx_q *rx_queue = NULL;
|
||||||
|
- int work_done = 0, work_done_per_q = 0;
|
||||||
|
- int i, budget_per_q = 0;
|
||||||
|
- int has_tx_work;
|
||||||
|
- unsigned long rstat_rxf;
|
||||||
|
- int num_act_queues;
|
||||||
|
+ int rx_cleaned = 0, budget_per_queue = 0, rx_cleaned_per_queue = 0;
|
||||||
|
+ int tx_cleaned = 0, i, left_over_budget = budget;
|
||||||
|
+ unsigned long serviced_queues = 0;
|
||||||
|
+ int num_queues = 0;
|
||||||
|
+
|
||||||
|
+ num_queues = gfargrp->num_rx_queues;
|
||||||
|
+ budget_per_queue = budget/num_queues;
|
||||||
|
|
||||||
|
/* Clear IEVENT, so interrupts aren't called again
|
||||||
|
* because of the packets that have already arrived
|
||||||
|
*/
|
||||||
|
gfar_write(®s->ievent, IEVENT_RTX_MASK);
|
||||||
|
|
||||||
|
- rstat_rxf = gfar_read(®s->rstat) & RSTAT_RXF_MASK;
|
||||||
|
-
|
||||||
|
- num_act_queues = bitmap_weight(&rstat_rxf, MAX_RX_QS);
|
||||||
|
- if (num_act_queues)
|
||||||
|
- budget_per_q = budget/num_act_queues;
|
||||||
|
-
|
||||||
|
- while (1) {
|
||||||
|
- has_tx_work = 0;
|
||||||
|
- for_each_set_bit(i, &gfargrp->tx_bit_map, priv->num_tx_queues) {
|
||||||
|
- tx_queue = priv->tx_queue[i];
|
||||||
|
- /* run Tx cleanup to completion */
|
||||||
|
- if (tx_queue->tx_skbuff[tx_queue->skb_dirtytx]) {
|
||||||
|
- gfar_clean_tx_ring(tx_queue);
|
||||||
|
- has_tx_work = 1;
|
||||||
|
- }
|
||||||
|
- }
|
||||||
|
+ while (num_queues && left_over_budget) {
|
||||||
|
+ budget_per_queue = left_over_budget/num_queues;
|
||||||
|
+ left_over_budget = 0;
|
||||||
|
|
||||||
|
for_each_set_bit(i, &gfargrp->rx_bit_map, priv->num_rx_queues) {
|
||||||
|
- /* skip queue if not active */
|
||||||
|
- if (!(rstat_rxf & (RSTAT_CLEAR_RXF0 >> i)))
|
||||||
|
+ if (test_bit(i, &serviced_queues))
|
||||||
|
continue;
|
||||||
|
-
|
||||||
|
rx_queue = priv->rx_queue[i];
|
||||||
|
- work_done_per_q =
|
||||||
|
- gfar_clean_rx_ring(rx_queue, budget_per_q);
|
||||||
|
- work_done += work_done_per_q;
|
||||||
|
-
|
||||||
|
- /* finished processing this queue */
|
||||||
|
- if (work_done_per_q < budget_per_q) {
|
||||||
|
- /* clear active queue hw indication */
|
||||||
|
- gfar_write(®s->rstat,
|
||||||
|
- RSTAT_CLEAR_RXF0 >> i);
|
||||||
|
- rstat_rxf &= ~(RSTAT_CLEAR_RXF0 >> i);
|
||||||
|
- num_act_queues--;
|
||||||
|
-
|
||||||
|
- if (!num_act_queues)
|
||||||
|
- break;
|
||||||
|
- /* recompute budget per Rx queue */
|
||||||
|
- budget_per_q =
|
||||||
|
- (budget - work_done) / num_act_queues;
|
||||||
|
+ tx_queue = priv->tx_queue[rx_queue->qindex];
|
||||||
|
+
|
||||||
|
+ tx_cleaned += gfar_clean_tx_ring(tx_queue);
|
||||||
|
+ rx_cleaned_per_queue =
|
||||||
|
+ gfar_clean_rx_ring(rx_queue, budget_per_queue);
|
||||||
|
+ rx_cleaned += rx_cleaned_per_queue;
|
||||||
|
+ if (rx_cleaned_per_queue < budget_per_queue) {
|
||||||
|
+ left_over_budget = left_over_budget +
|
||||||
|
+ (budget_per_queue -
|
||||||
|
+ rx_cleaned_per_queue);
|
||||||
|
+ set_bit(i, &serviced_queues);
|
||||||
|
+ num_queues--;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
+ }
|
||||||
|
|
||||||
|
- if (work_done >= budget)
|
||||||
|
- break;
|
||||||
|
-
|
||||||
|
- if (!num_act_queues && !has_tx_work) {
|
||||||
|
+ if (tx_cleaned)
|
||||||
|
+ return budget;
|
||||||
|
|
||||||
|
- napi_complete(napi);
|
||||||
|
+ if (rx_cleaned < budget) {
|
||||||
|
+ napi_complete(napi);
|
||||||
|
|
||||||
|
- /* Clear the halt bit in RSTAT */
|
||||||
|
- gfar_write(®s->rstat, gfargrp->rstat);
|
||||||
|
+ /* Clear the halt bit in RSTAT */
|
||||||
|
+ gfar_write(®s->rstat, gfargrp->rstat);
|
||||||
|
|
||||||
|
- gfar_write(®s->imask, IMASK_DEFAULT);
|
||||||
|
+ gfar_write(®s->imask, IMASK_DEFAULT);
|
||||||
|
|
||||||
|
- /* If we are coalescing interrupts, update the timer
|
||||||
|
- * Otherwise, clear it
|
||||||
|
- */
|
||||||
|
- gfar_configure_coalescing(priv, gfargrp->rx_bit_map,
|
||||||
|
- gfargrp->tx_bit_map);
|
||||||
|
- break;
|
||||||
|
- }
|
||||||
|
+ /* If we are coalescing interrupts, update the timer
|
||||||
|
+ * Otherwise, clear it
|
||||||
|
+ */
|
||||||
|
+ gfar_configure_coalescing(priv, gfargrp->rx_bit_map,
|
||||||
|
+ gfargrp->tx_bit_map);
|
||||||
|
}
|
||||||
|
|
||||||
|
- return work_done;
|
||||||
|
+ return rx_cleaned;
|
||||||
|
}
|
||||||
|
|
||||||
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
||||||
|
--- a/drivers/net/ethernet/freescale/gianfar.h
|
||||||
|
+++ b/drivers/net/ethernet/freescale/gianfar.h
|
||||||
|
@@ -291,9 +291,7 @@ extern const char gfar_driver_version[];
|
||||||
|
#define RCTRL_PADDING(x) ((x << 16) & RCTRL_PAL_MASK)
|
||||||
|
|
||||||
|
|
||||||
|
-#define RSTAT_CLEAR_RHALT 0x00800000
|
||||||
|
-#define RSTAT_CLEAR_RXF0 0x00000080
|
||||||
|
-#define RSTAT_RXF_MASK 0x000000ff
|
||||||
|
+#define RSTAT_CLEAR_RHALT 0x00800000
|
||||||
|
|
||||||
|
#define TCTRL_IPCSEN 0x00004000
|
||||||
|
#define TCTRL_TUCSEN 0x00002000
|
||||||
Loading…
Reference in New Issue