svn commit: r352473 - stable/12/sys/arm64/arm64

[Jayachandran C.]

Author: jchandra
Date: Wed Sep 18 07:22:37 2019
New Revision: 352473
URL: https://svnweb.freebsd.org/changeset/base/352473

Log:
  MFC r340602:
  
  gitv3_its: fixes for multiple GIC ITS blocks
  
  First pass of support for multiple GIC ITS blocks with ACPI.
  Changes are to:
   * register the correct subset of interrupts with pic_register
     in case of ACPI.
   * initialize just the cpu interface for the first ITS, when
     domain information is not avialable. This has to be done
     until we split the per-CPU init to do LPI setup just once.
   * remove duplicate check for the GIC ITS domain, the sc_cpus
     are setup from domain, so the check again in per-CPU init
     seems unnecessary.
  
  Reviewed by:	andrew
  Differential Revision:	https://reviews.freebsd.org/D17841

Modified:
  stable/12/sys/arm64/arm64/gicv3_its.c
Directory Properties:
  stable/12/   (props changed)

Modified: stable/12/sys/arm64/arm64/gicv3_its.c
==============================================================================
--- stable/12/sys/arm64/arm64/gicv3_its.c	Wed Sep 18 07:21:08 2019	(r352472)
+++ stable/12/sys/arm64/arm64/gicv3_its.c	Wed Sep 18 07:22:37 2019	(r352473)
@@ -580,18 +580,11 @@ its_init_cpu(device_t dev, struct gicv3_its_softc *sc)
 	uint64_t xbaser, tmp;
 	uint32_t ctlr;
 	u_int cpuid;
-	int domain;
 
-	if (!CPU_ISSET(PCPU_GET(cpuid), &sc->sc_cpus))
-		return (0);
-
-	if (bus_get_domain(dev, &domain) == 0) {
-		if (PCPU_GET(domain) != domain)
-			return (0);
-	}
-
 	gicv3 = device_get_parent(dev);
 	cpuid = PCPU_GET(cpuid);
+	if (!CPU_ISSET(cpuid, &sc->sc_cpus))
+		return (0);
 
 	/* Check if the ITS is enabled on this CPU */
 	if ((gic_r_read_4(gicv3, GICR_TYPER) & GICR_TYPER_PLPIS) == 0) {
@@ -729,12 +722,14 @@ gicv3_its_attach(device_t dev)
 	/* Protects access to the ITS command circular buffer. */
 	mtx_init(&sc->sc_its_cmd_lock, "ITS cmd lock", NULL, MTX_SPIN);
 
+	CPU_ZERO(&sc->sc_cpus);
 	if (bus_get_domain(dev, &domain) == 0) {
-		CPU_ZERO(&sc->sc_cpus);
 		if (domain < MAXMEMDOM)
 			CPU_COPY(&cpuset_domain[domain], &sc->sc_cpus);
 	} else {
-		CPU_COPY(&all_cpus, &sc->sc_cpus);
+		/* XXX : cannot handle more than one ITS per cpu */
+		if (device_get_unit(dev) == 0)
+			CPU_COPY(&all_cpus, &sc->sc_cpus);
 	}
 
 	/* Allocate the command circular buffer */
@@ -1737,7 +1732,7 @@ gicv3_its_acpi_attach(device_t dev)
 	sc->sc_pic = intr_pic_register(dev,
 	    device_get_unit(dev) + ACPI_MSI_XREF);
 	intr_pic_add_handler(device_get_parent(dev), sc->sc_pic,
-	    gicv3_its_intr, sc, GIC_FIRST_LPI, LPI_NIRQS);
+	    gicv3_its_intr, sc, sc->sc_irq_base, sc->sc_irq_length);
 
 	/* Register this device to handle MSI interrupts */
 	intr_msi_register(dev, device_get_unit(dev) + ACPI_MSI_XREF);