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Commit f49a372

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Paolo Abeni
committed
Merge branch 'bug-fixes-from-xdp-and-perout-series'
Meghana Malladi says: ==================== Bug fixes from XDP and perout series This patch series consists of bug fixes from the XDP series: 1. Fixes a kernel warning that occurs when bringing down the network interface. 2. Resolves a potential NULL pointer dereference in the emac_xmit_xdp_frame() function. 3. Resolves a potential NULL pointer dereference in the icss_iep_perout_enable() function v3: https://lore.kernel.org/all/[email protected]/ ==================== Link: https://patch.msgid.link/[email protected] Signed-off-by: Paolo Abeni <[email protected]>
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‎drivers/net/ethernet/ti/icssg/icss_iep.c‎

Lines changed: 58 additions & 63 deletions
Original file line numberDiff line numberDiff line change
@@ -412,6 +412,22 @@ static int icss_iep_perout_enable_hw(struct icss_iep *iep,
412412
int ret;
413413
u64 cmp;
414414

415+
if (!on) {
416+
/* Disable CMP 1 */
417+
regmap_update_bits(iep->map, ICSS_IEP_CMP_CFG_REG,
418+
IEP_CMP_CFG_CMP_EN(1), 0);
419+
420+
/* clear CMP regs */
421+
regmap_write(iep->map, ICSS_IEP_CMP1_REG0, 0);
422+
if (iep->plat_data->flags & ICSS_IEP_64BIT_COUNTER_SUPPORT)
423+
regmap_write(iep->map, ICSS_IEP_CMP1_REG1, 0);
424+
425+
/* Disable sync */
426+
regmap_write(iep->map, ICSS_IEP_SYNC_CTRL_REG, 0);
427+
428+
return 0;
429+
}
430+
415431
/* Calculate width of the signal for PPS/PEROUT handling */
416432
ts.tv_sec = req->on.sec;
417433
ts.tv_nsec = req->on.nsec;
@@ -430,64 +446,39 @@ static int icss_iep_perout_enable_hw(struct icss_iep *iep,
430446
if (ret)
431447
return ret;
432448

433-
if (on) {
434-
/* Configure CMP */
435-
regmap_write(iep->map, ICSS_IEP_CMP1_REG0, lower_32_bits(cmp));
436-
if (iep->plat_data->flags & ICSS_IEP_64BIT_COUNTER_SUPPORT)
437-
regmap_write(iep->map, ICSS_IEP_CMP1_REG1, upper_32_bits(cmp));
438-
/* Configure SYNC, based on req on width */
439-
regmap_write(iep->map, ICSS_IEP_SYNC_PWIDTH_REG,
440-
div_u64(ns_width, iep->def_inc));
441-
regmap_write(iep->map, ICSS_IEP_SYNC0_PERIOD_REG, 0);
442-
regmap_write(iep->map, ICSS_IEP_SYNC_START_REG,
443-
div_u64(ns_start, iep->def_inc));
444-
regmap_write(iep->map, ICSS_IEP_SYNC_CTRL_REG, 0); /* one-shot mode */
445-
/* Enable CMP 1 */
446-
regmap_update_bits(iep->map, ICSS_IEP_CMP_CFG_REG,
447-
IEP_CMP_CFG_CMP_EN(1), IEP_CMP_CFG_CMP_EN(1));
448-
} else {
449-
/* Disable CMP 1 */
450-
regmap_update_bits(iep->map, ICSS_IEP_CMP_CFG_REG,
451-
IEP_CMP_CFG_CMP_EN(1), 0);
452-
453-
/* clear regs */
454-
regmap_write(iep->map, ICSS_IEP_CMP1_REG0, 0);
455-
if (iep->plat_data->flags & ICSS_IEP_64BIT_COUNTER_SUPPORT)
456-
regmap_write(iep->map, ICSS_IEP_CMP1_REG1, 0);
457-
}
449+
/* Configure CMP */
450+
regmap_write(iep->map, ICSS_IEP_CMP1_REG0, lower_32_bits(cmp));
451+
if (iep->plat_data->flags & ICSS_IEP_64BIT_COUNTER_SUPPORT)
452+
regmap_write(iep->map, ICSS_IEP_CMP1_REG1, upper_32_bits(cmp));
453+
/* Configure SYNC, based on req on width */
454+
regmap_write(iep->map, ICSS_IEP_SYNC_PWIDTH_REG,
455+
div_u64(ns_width, iep->def_inc));
456+
regmap_write(iep->map, ICSS_IEP_SYNC0_PERIOD_REG, 0);
457+
regmap_write(iep->map, ICSS_IEP_SYNC_START_REG,
458+
div_u64(ns_start, iep->def_inc));
459+
regmap_write(iep->map, ICSS_IEP_SYNC_CTRL_REG, 0); /* one-shot mode */
460+
/* Enable CMP 1 */
461+
regmap_update_bits(iep->map, ICSS_IEP_CMP_CFG_REG,
462+
IEP_CMP_CFG_CMP_EN(1), IEP_CMP_CFG_CMP_EN(1));
458463
} else {
459-
if (on) {
460-
u64 start_ns;
461-
462-
iep->period = ((u64)req->period.sec * NSEC_PER_SEC) +
463-
req->period.nsec;
464-
start_ns = ((u64)req->period.sec * NSEC_PER_SEC)
465-
+ req->period.nsec;
466-
icss_iep_update_to_next_boundary(iep, start_ns);
467-
468-
regmap_write(iep->map, ICSS_IEP_SYNC_PWIDTH_REG,
469-
div_u64(ns_width, iep->def_inc));
470-
regmap_write(iep->map, ICSS_IEP_SYNC_START_REG,
471-
div_u64(ns_start, iep->def_inc));
472-
/* Enable Sync in single shot mode */
473-
regmap_write(iep->map, ICSS_IEP_SYNC_CTRL_REG,
474-
IEP_SYNC_CTRL_SYNC_N_EN(0) | IEP_SYNC_CTRL_SYNC_EN);
475-
/* Enable CMP 1 */
476-
regmap_update_bits(iep->map, ICSS_IEP_CMP_CFG_REG,
477-
IEP_CMP_CFG_CMP_EN(1), IEP_CMP_CFG_CMP_EN(1));
478-
} else {
479-
/* Disable CMP 1 */
480-
regmap_update_bits(iep->map, ICSS_IEP_CMP_CFG_REG,
481-
IEP_CMP_CFG_CMP_EN(1), 0);
482-
483-
/* clear CMP regs */
484-
regmap_write(iep->map, ICSS_IEP_CMP1_REG0, 0);
485-
if (iep->plat_data->flags & ICSS_IEP_64BIT_COUNTER_SUPPORT)
486-
regmap_write(iep->map, ICSS_IEP_CMP1_REG1, 0);
487-
488-
/* Disable sync */
489-
regmap_write(iep->map, ICSS_IEP_SYNC_CTRL_REG, 0);
490-
}
464+
u64 start_ns;
465+
466+
iep->period = ((u64)req->period.sec * NSEC_PER_SEC) +
467+
req->period.nsec;
468+
start_ns = ((u64)req->period.sec * NSEC_PER_SEC)
469+
+ req->period.nsec;
470+
icss_iep_update_to_next_boundary(iep, start_ns);
471+
472+
regmap_write(iep->map, ICSS_IEP_SYNC_PWIDTH_REG,
473+
div_u64(ns_width, iep->def_inc));
474+
regmap_write(iep->map, ICSS_IEP_SYNC_START_REG,
475+
div_u64(ns_start, iep->def_inc));
476+
/* Enable Sync in single shot mode */
477+
regmap_write(iep->map, ICSS_IEP_SYNC_CTRL_REG,
478+
IEP_SYNC_CTRL_SYNC_N_EN(0) | IEP_SYNC_CTRL_SYNC_EN);
479+
/* Enable CMP 1 */
480+
regmap_update_bits(iep->map, ICSS_IEP_CMP_CFG_REG,
481+
IEP_CMP_CFG_CMP_EN(1), IEP_CMP_CFG_CMP_EN(1));
491482
}
492483

493484
return 0;
@@ -498,11 +489,21 @@ static int icss_iep_perout_enable(struct icss_iep *iep,
498489
{
499490
int ret = 0;
500491

492+
if (!on)
493+
goto disable;
494+
501495
/* Reject requests with unsupported flags */
502496
if (req->flags & ~(PTP_PEROUT_DUTY_CYCLE |
503497
PTP_PEROUT_PHASE))
504498
return -EOPNOTSUPP;
505499

500+
/* Set default "on" time (1ms) for the signal if not passed by the app */
501+
if (!(req->flags & PTP_PEROUT_DUTY_CYCLE)) {
502+
req->on.sec = 0;
503+
req->on.nsec = NSEC_PER_MSEC;
504+
}
505+
506+
disable:
506507
mutex_lock(&iep->ptp_clk_mutex);
507508

508509
if (iep->pps_enabled) {
@@ -513,12 +514,6 @@ static int icss_iep_perout_enable(struct icss_iep *iep,
513514
if (iep->perout_enabled == !!on)
514515
goto exit;
515516

516-
/* Set default "on" time (1ms) for the signal if not passed by the app */
517-
if (!(req->flags & PTP_PEROUT_DUTY_CYCLE)) {
518-
req->on.sec = 0;
519-
req->on.nsec = NSEC_PER_MSEC;
520-
}
521-
522517
ret = icss_iep_perout_enable_hw(iep, req, on);
523518
if (!ret)
524519
iep->perout_enabled = !!on;

‎drivers/net/ethernet/ti/icssg/icssg_common.c‎

Lines changed: 4 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -583,7 +583,7 @@ u32 emac_xmit_xdp_frame(struct prueth_emac *emac,
583583
first_desc = k3_cppi_desc_pool_alloc(tx_chn->desc_pool);
584584
if (!first_desc) {
585585
netdev_dbg(ndev, "xdp tx: failed to allocate descriptor\n");
586-
goto drop_free_descs; /* drop */
586+
return ICSSG_XDP_CONSUMED; /* drop */
587587
}
588588

589589
if (page) { /* already DMA mapped by page_pool */
@@ -671,8 +671,10 @@ static u32 emac_run_xdp(struct prueth_emac *emac, struct xdp_buff *xdp,
671671

672672
q_idx = smp_processor_id() % emac->tx_ch_num;
673673
result = emac_xmit_xdp_frame(emac, xdpf, page, q_idx);
674-
if (result == ICSSG_XDP_CONSUMED)
674+
if (result == ICSSG_XDP_CONSUMED) {
675+
ndev->stats.tx_dropped++;
675676
goto drop;
677+
}
676678

677679
dev_sw_netstats_rx_add(ndev, xdpf->len);
678680
return result;
@@ -1215,9 +1217,6 @@ void prueth_reset_rx_chan(struct prueth_rx_chn *chn,
12151217
prueth_rx_cleanup);
12161218
if (disable)
12171219
k3_udma_glue_disable_rx_chn(chn->rx_chn);
1218-
1219-
page_pool_destroy(chn->pg_pool);
1220-
chn->pg_pool = NULL;
12211220
}
12221221
EXPORT_SYMBOL_GPL(prueth_reset_rx_chan);
12231222

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