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if_dwc: add detach method

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It can be useful for testing.

Reviewed by:	manu
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D35496
This commit is contained in:
Mitchell Horne 2022-06-21 10:26:44 -03:00
parent ca01879004
commit 27b39e58b3
1 changed files with 88 additions and 0 deletions
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88
sys/dev/dwc/if_dwc.c
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@ -1043,6 +1043,48 @@ out:
return (0);
}
static void
free_dma(struct dwc_softc *sc)
{
bus_dmamap_t map;
int idx;
/* Clean up RX DMA resources and free mbufs. */
for (idx = 0; idx < RX_DESC_COUNT; ++idx) {
if ((map = sc->rxbuf_map[idx].map) != NULL) {
bus_dmamap_unload(sc->rxbuf_tag, map);
bus_dmamap_destroy(sc->rxbuf_tag, map);
m_freem(sc->rxbuf_map[idx].mbuf);
}
}
if (sc->rxbuf_tag != NULL)
bus_dma_tag_destroy(sc->rxbuf_tag);
if (sc->rxdesc_map != NULL) {
bus_dmamap_unload(sc->rxdesc_tag, sc->rxdesc_map);
bus_dmamem_free(sc->rxdesc_tag, sc->rxdesc_ring,
sc->rxdesc_map);
}
if (sc->rxdesc_tag != NULL)
bus_dma_tag_destroy(sc->rxdesc_tag);
/* Clean up TX DMA resources. */
for (idx = 0; idx < TX_DESC_COUNT; ++idx) {
if ((map = sc->txbuf_map[idx].map) != NULL) {
/* TX maps are already unloaded. */
bus_dmamap_destroy(sc->txbuf_tag, map);
}
}
if (sc->txbuf_tag != NULL)
bus_dma_tag_destroy(sc->txbuf_tag);
if (sc->txdesc_map != NULL) {
bus_dmamap_unload(sc->txdesc_tag, sc->txdesc_map);
bus_dmamem_free(sc->txdesc_tag, sc->txdesc_ring,
sc->txdesc_map);
}
if (sc->txdesc_tag != NULL)
bus_dma_tag_destroy(sc->txdesc_tag);
}
/*
* if_ functions
*/
@ -1709,9 +1751,55 @@ dwc_attach(device_t dev)
return (0);
}
static int
dwc_detach(device_t dev)
{
struct dwc_softc *sc;
sc = device_get_softc(dev);
/*
* Disable and tear down interrupts before anything else, so we don't
* race with the handler.
*/
WRITE4(sc, INTERRUPT_ENABLE, 0);
if (sc->intr_cookie != NULL) {
bus_teardown_intr(dev, sc->res[1], sc->intr_cookie);
}
if (sc->is_attached) {
DWC_LOCK(sc);
sc->is_detaching = true;
dwc_stop_locked(sc);
DWC_UNLOCK(sc);
callout_drain(&sc->dwc_callout);
ether_ifdetach(sc->ifp);
}
if (sc->miibus != NULL) {
device_delete_child(dev, sc->miibus);
sc->miibus = NULL;
}
bus_generic_detach(dev);
/* Free DMA descriptors */
free_dma(sc);
if (sc->ifp != NULL) {
if_free(sc->ifp);
sc->ifp = NULL;
}
bus_release_resources(dev, dwc_spec, sc->res);
mtx_destroy(&sc->mtx);
return (0);
}
static device_method_t dwc_methods[] = {
DEVMETHOD(device_probe, dwc_probe),
DEVMETHOD(device_attach, dwc_attach),
DEVMETHOD(device_detach, dwc_detach),
/* MII Interface */
DEVMETHOD(miibus_readreg, dwc_miibus_read_reg),