diff options
| -rw-r--r-- | sys/arm64/arm64/gic.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/sys/arm64/arm64/gic.c b/sys/arm64/arm64/gic.c index 7ac88f32b224..812f64e2cba3 100644 --- a/sys/arm64/arm64/gic.c +++ b/sys/arm64/arm64/gic.c @@ -432,6 +432,39 @@ gicv2m_alloc_msix(device_t dev, device_t pci_dev, int *pirq) } static int +gicv2m_alloc_msi(device_t dev, device_t pci_dev, int count, int *irqs) +{ + struct arm_gic_softc *psc; + struct gicv2m_softc *sc; + uint32_t reg; + int i, irq; + + psc = device_get_softc(device_get_parent(dev)); + sc = device_get_softc(dev); + + mtx_lock(&sc->sc_mutex); + KASSERT(sc->sc_spi_offset + count <= sc->sc_spi_count, + ("No free SPIs for %d MSI interrupts", count)); + + /* Find an unused interrupt */ + for (i = 0; i < count; i++) { + irq = sc->sc_spi_start + sc->sc_spi_offset; + sc->sc_spi_offset++; + + /* Interrupts need to be edge triggered, set this */ + reg = gic_d_read_4(psc, GICD_ICFGR(irq >> 4)); + reg |= (GICD_ICFGR_TRIG_EDGE | GICD_ICFGR_POL_HIGH) << + ((irq & 0xf) * 2); + gic_d_write_4(psc, GICD_ICFGR(irq >> 4), reg); + + irqs[i] = irq; + } + mtx_unlock(&sc->sc_mutex); + + return (0); +} + +static int gicv2m_map_msi(device_t dev, device_t pci_dev, int irq, uint64_t *addr, uint32_t *data) { @@ -448,8 +481,9 @@ static device_method_t arm_gicv2m_methods[] = { DEVMETHOD(device_probe, gicv2m_probe), DEVMETHOD(device_attach, gicv2m_attach), - /* MSI-X */ + /* MSI/MSI-X */ DEVMETHOD(pic_alloc_msix, gicv2m_alloc_msix), + DEVMETHOD(pic_alloc_msi, gicv2m_alloc_msi), DEVMETHOD(pic_map_msi, gicv2m_map_msi), { 0, 0 } |