Bring back the acpi(4) changes. This time around only use the ACPI _CRS

information on ACPI 5.0 and later.

ok krw@, patrick@

1 files changed, 233 insertions, 9 deletions

diff --git a/sys/arch/amd64/pci/acpipci.c b/sys/arch/amd64/pci/acpipci.c
index 33833de6975..94351eb47e8 100644
--- a/sys/arch/amd64/pci/acpipci.c
+++ b/sys/arch/amd64/pci/acpipci.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: acpipci.c,v 1.3 2019/09/07 13:46:19 kettenis Exp $	*/
+/*	$OpenBSD: acpipci.c,v 1.4 2020/05/14 13:07:11 kettenis Exp $	*/
 /*
  * Copyright (c) 2018 Mark Kettenis
  *
@@ -53,6 +53,19 @@ struct acpipci_softc {
 	struct device	sc_dev;
 	struct acpi_softc *sc_acpi;
 	struct aml_node *sc_node;
+
+	bus_space_tag_t	sc_iot;
+	bus_space_tag_t	sc_memt;
+	bus_dma_tag_t	sc_dmat;
+
+	struct extent	*sc_busex;
+	struct extent	*sc_memex;
+	struct extent	*sc_ioex;
+	char		sc_busex_name[32];
+	char		sc_ioex_name[32];
+	char		sc_memex_name[32];
+	int		sc_bus;
+	uint32_t	sc_seg;
 };
 
 int	acpipci_match(struct device *, void *, void *);
@@ -72,6 +85,11 @@ const char *acpipci_hids[] = {
 	NULL
 };
 
+void	acpipci_attach_deferred(struct device *);
+int	acpipci_print(void *, const char *);
+int	acpipci_parse_resources(int, union acpi_resource *, void *);
+void	acpipci_osc(struct acpipci_softc *);
+
 int
 acpipci_match(struct device *parent, void *match, void *aux)
 {
@@ -86,15 +104,225 @@ acpipci_attach(struct device *parent, struct device *self, void *aux)
 {
 	struct acpi_attach_args *aaa = aux;
 	struct acpipci_softc *sc = (struct acpipci_softc *)self;
-	struct aml_value args[4];
 	struct aml_value res;
-	static uint8_t uuid[16] = ACPI_PCI_UUID;
-	uint32_t buf[3];
+	uint64_t bbn = 0;
+	uint64_t seg = 0;
+
+	acpi_haspci = 1;
+
+	sc->sc_iot = aaa->aaa_iot;
+	sc->sc_memt = aaa->aaa_memt;
+	sc->sc_dmat = aaa->aaa_dmat;
 
 	sc->sc_acpi = (struct acpi_softc *)parent;
 	sc->sc_node = aaa->aaa_node;
 	printf(" %s", sc->sc_node->name);
 
+	acpipci_osc(sc);
+
+	aml_evalinteger(sc->sc_acpi, sc->sc_node, "_BBN", 0, NULL, &bbn);
+	sc->sc_bus = bbn;
+
+	aml_evalinteger(sc->sc_acpi, sc->sc_node, "_SEG", 0, NULL, &seg);
+	sc->sc_seg = seg;
+
+	if (aml_evalname(sc->sc_acpi, sc->sc_node, "_CRS", 0, NULL, &res)) {
+		printf(": can't find resources\n");
+
+		pci_init_extents();
+		sc->sc_busex = pcibus_ex;
+		sc->sc_ioex = pciio_ex;
+		sc->sc_memex = pcimem_ex;
+
+		return;
+	}
+
+	/* Create extents for our address spaces. */
+	snprintf(sc->sc_busex_name, sizeof(sc->sc_busex_name),
+	    "%s pcibus", sc->sc_dev.dv_xname);
+	snprintf(sc->sc_ioex_name, sizeof(sc->sc_ioex_name),
+	    "%s pciio", sc->sc_dev.dv_xname);
+	snprintf(sc->sc_memex_name, sizeof(sc->sc_memex_name),
+	    "%s pcimem", sc->sc_dev.dv_xname);
+	sc->sc_busex = extent_create(sc->sc_busex_name, 0, 255,
+	    M_DEVBUF, NULL, 0, EX_WAITOK | EX_FILLED);
+	sc->sc_ioex = extent_create(sc->sc_ioex_name, 0, 0xffffffff,
+	    M_DEVBUF, NULL, 0, EX_WAITOK | EX_FILLED);
+	sc->sc_memex = extent_create(sc->sc_memex_name, 0, (u_long)-1,
+	    M_DEVBUF, NULL, 0, EX_WAITOK | EX_FILLED);
+
+	aml_parse_resource(&res, acpipci_parse_resources, sc);
+
+	if (sc->sc_acpi->sc_major < 5) {
+		extent_destroy(sc->sc_ioex);
+		extent_destroy(sc->sc_memex);
+
+		pci_init_extents();
+		sc->sc_ioex =  pciio_ex;
+		sc->sc_memex = pcimem_ex;
+	}
+
+	printf("\n");
+
+#ifdef DIAGNOSTIC
+	extent_print(sc->sc_busex);
+	extent_print(sc->sc_ioex);
+	extent_print(sc->sc_memex);
+#endif
+}
+
+void
+acpipci_attach_bus(struct device *parent, struct acpipci_softc *sc)
+{
+	struct pcibus_attach_args pba;
+	pcitag_t tag;
+	pcireg_t id, class;
+
+	memset(&pba, 0, sizeof(pba));
+	pba.pba_busname = "pci";
+	pba.pba_iot = sc->sc_iot;
+	pba.pba_memt = sc->sc_memt;
+	pba.pba_dmat = sc->sc_dmat;
+	pba.pba_busex = sc->sc_busex;
+	pba.pba_ioex = sc->sc_ioex;
+	pba.pba_memex = sc->sc_memex;
+	pba.pba_pmemex = sc->sc_memex;
+	pba.pba_domain = pci_ndomains++;
+	pba.pba_bus = sc->sc_bus;
+
+	/* Enable MSI in ACPI 2.0 and above, unless we're told not to. */
+	if (sc->sc_acpi->sc_fadt->hdr.revision >= 2 &&
+	    (sc->sc_acpi->sc_fadt->iapc_boot_arch & FADT_NO_MSI) == 0)
+		pba.pba_flags |= PCI_FLAGS_MSI_ENABLED;
+
+	/*
+	 * Don't enable MSI on chipsets from low-end manifacturers
+	 * like VIA and SiS.  We do this by looking at the host
+	 * bridge, which should be device 0 function 0.
+	 */
+	tag = pci_make_tag(pba.pba_pc, sc->sc_bus, 0, 0);
+	id = pci_conf_read(pba.pba_pc, tag, PCI_ID_REG);
+	class = pci_conf_read(pba.pba_pc, tag, PCI_CLASS_REG);
+	if (PCI_CLASS(class) == PCI_CLASS_BRIDGE &&
+	    PCI_SUBCLASS(class) != PCI_SUBCLASS_BRIDGE_HOST &&
+	    PCI_VENDOR(id) != PCI_VENDOR_AMD &&
+	    PCI_VENDOR(id) != PCI_VENDOR_NVIDIA &&
+	    PCI_VENDOR(id) != PCI_VENDOR_INTEL)
+		pba.pba_flags &= ~PCI_FLAGS_MSI_ENABLED;
+
+	/*
+	 * Don't enable MSI on a HyperTransport bus.  In order to
+	 * determine that a bus is a HyperTransport bus, we look at
+	 * device 24 function 0, which is the HyperTransport
+	 * host/primary interface integrated on most 64-bit AMD CPUs.
+	 * If that device has a HyperTransport capability, this must
+	 * be a HyperTransport bus and we disable MSI.
+	 */
+	tag = pci_make_tag(pba.pba_pc, sc->sc_bus, 24, 0);
+	if (pci_get_capability(pba.pba_pc, tag, PCI_CAP_HT, NULL, NULL))
+		pba.pba_flags &= ~PCI_FLAGS_MSI_ENABLED;
+
+	config_found(parent, &pba, acpipci_print);
+}
+
+void
+acpipci_attach_busses(struct device *parent)
+{
+	int i;
+
+	for (i = 0; i < acpipci_cd.cd_ndevs; i++) {
+		if (acpipci_cd.cd_devs[i])
+			acpipci_attach_bus(parent, acpipci_cd.cd_devs[i]);
+	}
+}
+
+int
+acpipci_print(void *aux, const char *pnp)
+{
+	struct pcibus_attach_args *pba = aux;
+
+	if (pnp)
+		printf("%s at %s", pba->pba_busname, pnp);
+	printf(" bus %d", pba->pba_bus);
+	return (UNCONF);
+}
+
+int
+acpipci_parse_resources(int crsidx, union acpi_resource *crs, void *arg)
+{
+	struct acpipci_softc *sc = arg;
+	int type = AML_CRSTYPE(crs);
+	int restype, tflags = 0;
+	u_long min, len = 0, tra = 0;
+
+	switch (type) {
+	case LR_WORD:
+		restype = crs->lr_word.type;
+		tflags = crs->lr_word.tflags;
+		min = crs->lr_word._min;
+		len = crs->lr_word._len;
+		tra = crs->lr_word._tra;
+		break;
+	case LR_DWORD:
+		restype = crs->lr_dword.type;
+		tflags = crs->lr_dword.tflags;
+		min = crs->lr_dword._min;
+		len = crs->lr_dword._len;
+		tra = crs->lr_dword._tra;
+		break;
+	case LR_QWORD:
+		restype = crs->lr_qword.type;
+		tflags = crs->lr_qword.tflags;
+		min = crs->lr_qword._min;
+		len = crs->lr_qword._len;
+		tra = crs->lr_qword._tra;
+		break;
+	case LR_MEM32FIXED:
+		/*
+		 * Coreboot on the PC Engines apu2 incorrectly uses a
+		 * Memory32Fixed resource descriptor to describe mmio
+		 * address space forwarded to the PCI bus.
+		 */
+		restype = LR_TYPE_MEMORY;
+		min = crs->lr_m32fixed._bas;
+		len = crs->lr_m32fixed._len;
+		break;
+	}
+
+	if (len == 0)
+		return 0;
+
+	switch (restype) {
+	case LR_TYPE_MEMORY:
+		if (tflags & LR_MEMORY_TTP)
+			return 0;
+		extent_free(sc->sc_memex, min, len, EX_WAITOK | EX_CONFLICTOK);
+		break;
+	case LR_TYPE_IO:
+		if (tflags & LR_IO_TTP)
+			return 0;
+		extent_free(sc->sc_ioex, min, len, EX_WAITOK | EX_CONFLICTOK);
+		break;
+	case LR_TYPE_BUS:
+		extent_free(sc->sc_busex, min, len, EX_WAITOK);
+		/*
+		 * Let _CRS minimum bus number override _BBN.
+		 */
+		sc->sc_bus = min;
+		break;
+	}
+
+	return 0;
+}
+
+void
+acpipci_osc(struct acpipci_softc *sc)
+{
+	struct aml_value args[4];
+	struct aml_value res;
+	static uint8_t uuid[16] = ACPI_PCI_UUID;
+	uint32_t buf[3];
+	
 	memset(args, 0, sizeof(args));
 	args[0].type = AML_OBJTYPE_BUFFER;
 	args[0].v_buffer = uuid;
@@ -112,10 +340,8 @@ acpipci_attach(struct device *parent, struct device *self, void *aux)
 	buf[1] = ACPI_PCI_PCIE_CONFIG | ACPI_PCI_MSI;
 	buf[2] = ACPI_PCI_PCIE_HOTPLUG;
 
-	if (aml_evalname(sc->sc_acpi, sc->sc_node, "_OSC", 4, args, &res)) {
-		printf(": _OSC failed\n");
+	if (aml_evalname(sc->sc_acpi, sc->sc_node, "_OSC", 4, args, &res))
 		return;
-	}
 
 	if (res.type == AML_OBJTYPE_BUFFER) {
 		size_t len = res.length;
@@ -128,6 +354,4 @@ acpipci_attach(struct device *parent, struct device *self, void *aux)
 			len -= 4;
 		}
 	}
-
-	printf("\n");
 }