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Pre-allocate the bus dma maps for the rxbufs to avoid calling

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bus_dmamap_create(9) from interrupt context.

ok mglocker@
This commit is contained in:
kettenis
2026-05-19 20:32:59 +00:00
parent 2c624edbb2
commit b68ca756c4
1 changed files with 8 additions and 8 deletions
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sys/dev/ic/qwz.c
+8 -8
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@@ -1,4 +1,4 @@
/* $OpenBSD: qwz.c,v 1.31 2026/05/19 09:29:08 kirill Exp $ */
/* $OpenBSD: qwz.c,v 1.32 2026/05/19 20:32:59 kettenis Exp $ */
/*
* Copyright 2023 Stefan Sperling <stsp@openbsd.org>
@@ -8392,6 +8392,8 @@ qwz_dp_cc_desc_init(struct qwz_softc *sc)
struct ath12k_tx_desc_info *tx_descs, **tx_desc_addr;
uint32_t i, j, pool_id, tx_spt_page;
uint32_t ppt_idx;
const bus_size_t size = DP_RX_BUFFER_SIZE;
int ret;
#ifdef notyet
spin_lock_bh(&dp->rx_desc_lock);
@@ -8418,6 +8420,11 @@ qwz_dp_cc_desc_init(struct qwz_softc *sc)
TAILQ_INSERT_TAIL(&dp->rx_desc_free_list,
&rx_descs[j], entry);
ret = bus_dmamap_create(sc->sc_dmat, size, 1, size,
0, BUS_DMA_WAITOK, &rx_descs[j].map);
if (ret)
return ret;
/* Update descriptor VA in SPT */
rx_desc_addr = ath12k_dp_cc_get_desc_addr_ptr(sc, ppt_idx, j);
*rx_desc_addr = &rx_descs[j];
@@ -13387,13 +13394,6 @@ qwz_dp_rxbufs_replenish(struct qwz_softc *sc,
if (rx_desc == NULL)
goto fail_free_mbuf;
if (rx_desc->map == NULL) {
ret = bus_dmamap_create(sc->sc_dmat, size, 1,
size, 0, BUS_DMA_NOWAIT, &rx_desc->map);
if (ret)
goto fail_free_mbuf;
}
ret = bus_dmamap_load_mbuf(sc->sc_dmat, rx_desc->map, m,
BUS_DMA_READ | BUS_DMA_NOWAIT);
if (ret) {