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-rw-r--r--sys/dev/pci/controller/pci_n1sdp.c350
-rw-r--r--sys/dev/pci/pci_host_generic_acpi.c14
-rw-r--r--sys/dev/pci/pci_host_generic_acpi.h2
3 files changed, 364 insertions, 2 deletions
diff --git a/sys/dev/pci/controller/pci_n1sdp.c b/sys/dev/pci/controller/pci_n1sdp.c
new file mode 100644
index 000000000000..d51641c432f4
--- /dev/null
+++ b/sys/dev/pci/controller/pci_n1sdp.c
@@ -0,0 +1,350 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2019 Andrew Turner
+ * Copyright (c) 2019 Ruslan Bukin <br@bsdpad.com>
+ *
+ * This software was developed by SRI International and the University of
+ * Cambridge Computer Laboratory (Department of Computer Science and
+ * Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
+ * DARPA SSITH research programme.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/bus.h>
+#include <sys/endian.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/rman.h>
+
+#include <vm/vm.h>
+#include <vm/vm_extern.h>
+#include <vm/vm_page.h>
+
+#include <contrib/dev/acpica/include/acpi.h>
+#include <contrib/dev/acpica/include/accommon.h>
+
+#include <dev/acpica/acpivar.h>
+#include <dev/acpica/acpi_pcibvar.h>
+
+#include <dev/pci/pcivar.h>
+#include <dev/pci/pcireg.h>
+#include <dev/pci/pcib_private.h>
+#include <dev/pci/pci_host_generic.h>
+#include <dev/pci/pci_host_generic_acpi.h>
+
+#include "pcib_if.h"
+
+#define AP_NS_SHARED_MEM_BASE 0x06000000
+#define N1SDP_MAX_SEGMENTS 2 /* Two PCIe root complex devices. */
+#define BDF_TABLE_SIZE (16 * 1024)
+#define PCI_CFG_SPACE_SIZE 0x1000
+
+struct pcie_discovery_data {
+ uint32_t rc_base_addr;
+ uint32_t nr_bdfs;
+ uint32_t valid_bdfs[0];
+};
+
+struct generic_pcie_n1sdp_softc {
+ struct generic_pcie_acpi_softc acpi;
+ struct pcie_discovery_data *n1_discovery_data;
+ bus_space_handle_t n1_bsh;
+};
+
+static int
+n1sdp_init(struct generic_pcie_n1sdp_softc *sc)
+{
+ struct pcie_discovery_data *shared_data;
+ vm_offset_t vaddr;
+ vm_paddr_t paddr_rc;
+ vm_paddr_t paddr;
+ int table_count;
+ int bdfs_size;
+ int error, i;
+
+ paddr = AP_NS_SHARED_MEM_BASE + sc->acpi.segment * BDF_TABLE_SIZE;
+ vaddr = kva_alloc((vm_size_t)BDF_TABLE_SIZE);
+ if (vaddr == 0) {
+ printf("%s: Can't allocate KVA memory.", __func__);
+ return (ENXIO);
+ }
+ pmap_kenter(vaddr, (vm_size_t)BDF_TABLE_SIZE, paddr,
+ VM_MEMATTR_UNCACHEABLE);
+
+ shared_data = (struct pcie_discovery_data *)vaddr;
+ bdfs_size = sizeof(struct pcie_discovery_data) +
+ sizeof(uint32_t) * shared_data->nr_bdfs;
+ sc->n1_discovery_data = malloc(bdfs_size, M_DEVBUF, M_WAITOK | M_ZERO);
+ memcpy(sc->n1_discovery_data, shared_data, bdfs_size);
+
+ paddr_rc = (vm_offset_t)shared_data->rc_base_addr;
+ error = bus_space_map(sc->acpi.base.bst, paddr_rc, PCI_CFG_SPACE_SIZE,
+ 0, &sc->n1_bsh);
+ if (error != 0)
+ return (error);
+
+ if (bootverbose) {
+ table_count = sc->n1_discovery_data->nr_bdfs;
+ for (i = 0; i < table_count; i++)
+ printf("valid bdf %x\n",
+ sc->n1_discovery_data->valid_bdfs[i]);
+ }
+
+ pmap_kremove(vaddr);
+ kva_free(vaddr, (vm_size_t)BDF_TABLE_SIZE);
+
+ return (0);
+}
+
+static int
+n1sdp_check_bdf(struct generic_pcie_n1sdp_softc *sc,
+ u_int bus, u_int slot, u_int func)
+{
+ int table_count;
+ int bdf;
+ int i;
+
+ bdf = PCIE_ADDR_OFFSET(bus, slot, func, 0);
+ if (bdf == 0)
+ return (1);
+
+ table_count = sc->n1_discovery_data->nr_bdfs;
+
+ for (i = 0; i < table_count; i++)
+ if (bdf == sc->n1_discovery_data->valid_bdfs[i])
+ return (1);
+
+ return (0);
+}
+
+static int
+n1sdp_pcie_acpi_probe(device_t dev)
+{
+ ACPI_DEVICE_INFO *devinfo;
+ ACPI_TABLE_HEADER *hdr;
+ ACPI_STATUS status;
+ ACPI_HANDLE h;
+ int root;
+
+ if (acpi_disabled("pcib") || (h = acpi_get_handle(dev)) == NULL ||
+ ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
+ return (ENXIO);
+
+ root = (devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0;
+ AcpiOsFree(devinfo);
+ if (!root)
+ return (ENXIO);
+
+ /* TODO: Move this to an ACPI quirk? */
+ status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr);
+ if (ACPI_FAILURE(status))
+ return (ENXIO);
+
+ if (memcmp(hdr->OemId, "ARMLTD", ACPI_OEM_ID_SIZE) != 0 ||
+ memcmp(hdr->OemTableId, "ARMN1SDP", ACPI_OEM_TABLE_ID_SIZE) != 0 ||
+ hdr->OemRevision != 0x20181101)
+ return (ENXIO);
+
+ device_set_desc(dev, "ARM N1SDP PCI host controller");
+ return (BUS_PROBE_DEFAULT);
+}
+
+static int
+n1sdp_pcie_acpi_attach(device_t dev)
+{
+ struct generic_pcie_n1sdp_softc *sc;
+ ACPI_HANDLE handle;
+ ACPI_STATUS status;
+ int err;
+
+ err = pci_host_generic_acpi_init(dev);
+ if (err != 0)
+ return (err);
+
+ sc = device_get_softc(dev);
+ handle = acpi_get_handle(dev);
+
+ /* Get PCI Segment (domain) needed for IOMMU space remap. */
+ status = acpi_GetInteger(handle, "_SEG", &sc->acpi.segment);
+ if (ACPI_FAILURE(status)) {
+ device_printf(dev, "No _SEG for PCI Bus\n");
+ return (ENXIO);
+ }
+
+ if (sc->acpi.segment >= N1SDP_MAX_SEGMENTS) {
+ device_printf(dev, "Unknown PCI Bus segment (domain) %d\n",
+ sc->acpi.segment);
+ return (ENXIO);
+ }
+
+ err = n1sdp_init(sc);
+ if (err)
+ return (err);
+
+ device_add_child(dev, "pci", -1);
+ return (bus_generic_attach(dev));
+}
+
+static int
+n1sdp_get_bus_space(device_t dev, u_int bus, u_int slot, u_int func, u_int reg,
+ bus_space_tag_t *bst, bus_space_handle_t *bsh, bus_size_t *offset)
+{
+ struct generic_pcie_n1sdp_softc *sc;
+
+ sc = device_get_softc(dev);
+
+ if (n1sdp_check_bdf(sc, bus, slot, func) == 0)
+ return (EINVAL);
+
+ if (bus == sc->acpi.base.bus_start) {
+ if (slot != 0 || func != 0)
+ return (EINVAL);
+ *bsh = sc->n1_bsh;
+ } else {
+ *bsh = sc->acpi.base.bsh;
+ }
+
+ *bst = sc->acpi.base.bst;
+ *offset = PCIE_ADDR_OFFSET(bus - sc->acpi.base.bus_start, slot, func,
+ reg);
+
+ return (0);
+}
+
+static uint32_t
+n1sdp_pcie_read_config(device_t dev, u_int bus, u_int slot,
+ u_int func, u_int reg, int bytes)
+{
+ struct generic_pcie_n1sdp_softc *sc_n1sdp;
+ struct generic_pcie_acpi_softc *sc_acpi;
+ struct generic_pcie_core_softc *sc;
+ bus_space_handle_t h;
+ bus_space_tag_t t;
+ bus_size_t offset;
+ uint32_t data;
+
+ sc_n1sdp = device_get_softc(dev);
+ sc_acpi = &sc_n1sdp->acpi;
+ sc = &sc_acpi->base;
+
+ if ((bus < sc->bus_start) || (bus > sc->bus_end))
+ return (~0U);
+ if ((slot > PCI_SLOTMAX) || (func > PCI_FUNCMAX) ||
+ (reg > PCIE_REGMAX))
+ return (~0U);
+
+ if (n1sdp_get_bus_space(dev, bus, slot, func, reg, &t, &h, &offset) !=0)
+ return (~0U);
+
+ data = bus_space_read_4(t, h, offset & ~3);
+
+ switch (bytes) {
+ case 1:
+ data >>= (offset & 3) * 8;
+ data &= 0xff;
+ break;
+ case 2:
+ data >>= (offset & 3) * 8;
+ data = le16toh(data);
+ break;
+ case 4:
+ data = le32toh(data);
+ break;
+ default:
+ return (~0U);
+ }
+
+ return (data);
+}
+
+static void
+n1sdp_pcie_write_config(device_t dev, u_int bus, u_int slot,
+ u_int func, u_int reg, uint32_t val, int bytes)
+{
+ struct generic_pcie_n1sdp_softc *sc_n1sdp;
+ struct generic_pcie_acpi_softc *sc_acpi;
+ struct generic_pcie_core_softc *sc;
+ bus_space_handle_t h;
+ bus_space_tag_t t;
+ bus_size_t offset;
+ uint32_t data;
+
+ sc_n1sdp = device_get_softc(dev);
+ sc_acpi = &sc_n1sdp->acpi;
+ sc = &sc_acpi->base;
+
+ if ((bus < sc->bus_start) || (bus > sc->bus_end))
+ return;
+ if ((slot > PCI_SLOTMAX) || (func > PCI_FUNCMAX) ||
+ (reg > PCIE_REGMAX))
+ return;
+
+ if (n1sdp_get_bus_space(dev, bus, slot, func, reg, &t, &h, &offset) !=0)
+ return;
+
+ data = bus_space_read_4(t, h, offset & ~3);
+
+ switch (bytes) {
+ case 1:
+ data &= ~(0xff << ((offset & 3) * 8));
+ data |= (val & 0xff) << ((offset & 3) * 8);
+ break;
+ case 2:
+ data &= ~(0xffff << ((offset & 3) * 8));
+ data |= (val & 0xffff) << ((offset & 3) * 8);
+ break;
+ case 4:
+ data = val;
+ break;
+ default:
+ return;
+ }
+
+ bus_space_write_4(t, h, offset & ~3, data);
+}
+
+static device_method_t n1sdp_pcie_acpi_methods[] = {
+ DEVMETHOD(device_probe, n1sdp_pcie_acpi_probe),
+ DEVMETHOD(device_attach, n1sdp_pcie_acpi_attach),
+
+ /* pcib interface */
+ DEVMETHOD(pcib_read_config, n1sdp_pcie_read_config),
+ DEVMETHOD(pcib_write_config, n1sdp_pcie_write_config),
+
+ DEVMETHOD_END
+};
+
+DEFINE_CLASS_1(pcib, n1sdp_pcie_acpi_driver, n1sdp_pcie_acpi_methods,
+ sizeof(struct generic_pcie_n1sdp_softc), generic_pcie_acpi_driver);
+
+static devclass_t n1sdp_pcie_acpi_devclass;
+
+DRIVER_MODULE(n1sdp_pcib, acpi, n1sdp_pcie_acpi_driver,
+ n1sdp_pcie_acpi_devclass, 0, 0);
diff --git a/sys/dev/pci/pci_host_generic_acpi.c b/sys/dev/pci/pci_host_generic_acpi.c
index c5ca9ab0a1d0..f853c69a3af0 100644
--- a/sys/dev/pci/pci_host_generic_acpi.c
+++ b/sys/dev/pci/pci_host_generic_acpi.c
@@ -230,7 +230,7 @@ pci_host_acpi_get_ecam_resource(device_t dev)
}
int
-pci_host_generic_acpi_attach(device_t dev)
+pci_host_generic_acpi_init(device_t dev)
{
struct generic_pcie_acpi_softc *sc;
ACPI_HANDLE handle;
@@ -302,6 +302,18 @@ pci_host_generic_acpi_attach(device_t dev)
}
}
+ return (0);
+}
+
+static int
+pci_host_generic_acpi_attach(device_t dev)
+{
+ int error;
+
+ error = pci_host_generic_acpi_init(dev);
+ if (error != 0)
+ return (error);
+
device_add_child(dev, "pci", -1);
return (bus_generic_attach(dev));
}
diff --git a/sys/dev/pci/pci_host_generic_acpi.h b/sys/dev/pci/pci_host_generic_acpi.h
index eb9b23094703..58bfd90a9fd8 100644
--- a/sys/dev/pci/pci_host_generic_acpi.h
+++ b/sys/dev/pci/pci_host_generic_acpi.h
@@ -42,6 +42,6 @@ struct generic_pcie_acpi_softc {
DECLARE_CLASS(generic_pcie_acpi_driver);
-int pci_host_generic_acpi_attach(device_t dev);
+int pci_host_generic_acpi_init(device_t dev);
#endif /* !_DEV_PCI_PCI_HOST_GENERIC_ACPI_H_ */
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-29 07:01:26 +0000