svn commit: r308286 - in head/sys/arm/nvidia: . tegra124
Michal Meloun
mmel at FreeBSD.org
Fri Nov 4 11:39:21 UTC 2016
Author: mmel
Date: Fri Nov 4 11:39:19 2016
New Revision: 308286
URL: https://svnweb.freebsd.org/changeset/base/308286
Log:
TEGRA: Add basic driver for memory controller.
For now, it only reports memory and SMMU access errors.
Added:
head/sys/arm/nvidia/tegra_mc.c (contents, props changed)
Modified:
head/sys/arm/nvidia/tegra124/files.tegra124
Modified: head/sys/arm/nvidia/tegra124/files.tegra124
==============================================================================
--- head/sys/arm/nvidia/tegra124/files.tegra124 Fri Nov 4 04:47:08 2016 (r308285)
+++ head/sys/arm/nvidia/tegra124/files.tegra124 Fri Nov 4 11:39:19 2016 (r308286)
@@ -33,6 +33,7 @@ arm/nvidia/tegra_efuse.c standard
arm/nvidia/tegra_soctherm_if.m standard
arm/nvidia/tegra_soctherm.c standard
arm/nvidia/tegra_lic.c standard
+arm/nvidia/tegra_mc.c standard
#arm/nvidia/tegra_hda.c optional snd_hda
#arm/nvidia/drm2/hdmi.c optional drm2
#arm/nvidia/drm2/tegra_drm_if.m optional drm2
Added: head/sys/arm/nvidia/tegra_mc.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/nvidia/tegra_mc.c Fri Nov 4 11:39:19 2016 (r308286)
@@ -0,0 +1,311 @@
+/*-
+ * Copyright (c) 2016 Michal Meloun <mmel at FreeBSD.org>
+ * All rights reserved.
+ *
+ * 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("$FreeBSD$");
+
+/*
+ * Memory controller driver for Tegra SoCs.
+ */
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/limits.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/module.h>
+#include <sys/resource.h>
+
+#include <machine/bus.h>
+#include <machine/resource.h>
+#include <sys/rman.h>
+
+#include <dev/extres/clk/clk.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include "clock_if.h"
+
+#define MC_INTSTATUS 0x000
+#define MC_INTMASK 0x004
+#define MC_INT_DECERR_MTS (1 << 16)
+#define MC_INT_SECERR_SEC (1 << 13)
+#define MC_INT_DECERR_VPR (1 << 12)
+#define MC_INT_INVALID_APB_ASID_UPDATE (1 << 11)
+#define MC_INT_INVALID_SMMU_PAGE (1 << 10)
+#define MC_INT_ARBITRATION_EMEM (1 << 9)
+#define MC_INT_SECURITY_VIOLATION (1 << 8)
+#define MC_INT_DECERR_EMEM (1 << 6)
+#define MC_INT_INT_MASK (MC_INT_DECERR_MTS | \
+ MC_INT_SECERR_SEC | \
+ MC_INT_DECERR_VPR | \
+ MC_INT_INVALID_APB_ASID_UPDATE | \
+ MC_INT_INVALID_SMMU_PAGE | \
+ MC_INT_ARBITRATION_EMEM | \
+ MC_INT_SECURITY_VIOLATION | \
+ MC_INT_DECERR_EMEM)
+
+#define MC_ERR_STATUS 0x008
+#define MC_ERR_TYPE(x) (((x) >> 28) & 0x7)
+#define MC_ERR_TYPE_DECERR_EMEM 2
+#define MC_ERR_TYPE_SECURITY_TRUSTZONE 3
+#define MC_ERR_TYPE_SECURITY_CARVEOUT 4
+#define MC_ERR_TYPE_INVALID_SMMU_PAGE 6
+#define MC_ERR_INVALID_SMMU_PAGE_READABLE (1 << 27)
+#define MC_ERR_INVALID_SMMU_PAGE_WRITABLE (1 << 26)
+#define MC_ERR_INVALID_SMMU_PAGE_NONSECURE (1 << 25)
+#define MC_ERR_ADR_HI(x) (((x) >> 20) & 0x3)
+#define MC_ERR_SWAP (1 << 18)
+#define MC_ERR_SECURITY (1 << 17)
+#define MC_ERR_RW (1 << 16)
+#define MC_ERR_ADR1(x) (((x) >> 12) & 0x7)
+#define MC_ERR_ID(x) (((x) >> 0) & 07F)
+
+#define MC_ERR_ADDR 0x00C
+#define MC_EMEM_CFG 0x050
+#define MC_EMEM_ADR_CFG 0x054
+#define MC_EMEM_NUMDEV(x) (((x) >> 0 ) & 0x1)
+
+#define MC_EMEM_ADR_CFG_DEV0 0x058
+#define MC_EMEM_ADR_CFG_DEV1 0x05C
+#define EMEM_DEV_DEVSIZE(x) (((x) >> 16) & 0xF)
+#define EMEM_DEV_BANKWIDTH(x) (((x) >> 8) & 0x3)
+#define EMEM_DEV_COLWIDTH(x) (((x) >> 8) & 0x3)
+
+#define WR4(_sc, _r, _v) bus_write_4((_sc)->mem_res, (_r), (_v))
+#define RD4(_sc, _r) bus_read_4((_sc)->mem_res, (_r))
+
+#define LOCK(_sc) mtx_lock(&(_sc)->mtx)
+#define UNLOCK(_sc) mtx_unlock(&(_sc)->mtx)
+#define SLEEP(_sc, timeout) mtx_sleep(sc, &sc->mtx, 0, "tegra_mc", timeout);
+#define LOCK_INIT(_sc) \
+ mtx_init(&_sc->mtx, device_get_nameunit(_sc->dev), "tegra_mc", MTX_DEF)
+#define LOCK_DESTROY(_sc) mtx_destroy(&_sc->mtx)
+#define ASSERT_LOCKED(_sc) mtx_assert(&_sc->mtx, MA_OWNED)
+#define ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->mtx, MA_NOTOWNED)
+
+static struct ofw_compat_data compat_data[] = {
+ {"nvidia,tegra124-mc", 1},
+ {NULL, 0}
+};
+
+struct tegra_mc_softc {
+ device_t dev;
+ struct mtx mtx;
+
+ struct resource *mem_res;
+ struct resource *irq_res;
+ void *irq_h;
+
+ clk_t clk;
+};
+
+static char *smmu_err_tbl[16] = {
+ "reserved", /* 0 */
+ "reserved", /* 1 */
+ "DRAM decode", /* 2 */
+ "Trustzome Security", /* 3 */
+ "Security carveout", /* 4 */
+ "reserved", /* 5 */
+ "Invalid SMMU page", /* 6 */
+ "reserved", /* 7 */
+};
+
+static void
+tegra_mc_intr(void *arg)
+{
+ struct tegra_mc_softc *sc;
+ uint32_t stat, err;
+ uint64_t addr;
+
+ sc = (struct tegra_mc_softc *)arg;
+
+ stat = RD4(sc, MC_INTSTATUS);
+ if ((stat & MC_INT_INT_MASK) == 0) {
+ WR4(sc, MC_INTSTATUS, stat);
+ return;
+ }
+
+ device_printf(sc->dev, "Memory Controller Interrupt:\n");
+ if (stat & MC_INT_DECERR_MTS)
+ printf(" - MTS carveout violation\n");
+ if (stat & MC_INT_SECERR_SEC)
+ printf(" - SEC carveout violation\n");
+ if (stat & MC_INT_DECERR_VPR)
+ printf(" - VPR requirements violated\n");
+ if (stat & MC_INT_INVALID_APB_ASID_UPDATE)
+ printf(" - ivalid APB ASID update\n");
+ if (stat & MC_INT_INVALID_SMMU_PAGE)
+ printf(" - SMMU address translation error\n");
+ if (stat & MC_INT_ARBITRATION_EMEM)
+ printf(" - arbitration deadlock-prevention threshold hit\n");
+ if (stat & MC_INT_SECURITY_VIOLATION)
+ printf(" - SMMU address translation security error\n");
+ if (stat & MC_INT_DECERR_EMEM)
+ printf(" - SMMU address decode error\n");
+
+ if ((stat & (MC_INT_INVALID_SMMU_PAGE | MC_INT_SECURITY_VIOLATION |
+ MC_INT_DECERR_EMEM)) != 0) {
+ err = RD4(sc, MC_ERR_STATUS);
+ addr = RD4(sc, MC_ERR_STATUS);
+ addr |= (uint64_t)(MC_ERR_ADR_HI(err)) << 32;
+ printf(" at 0x%012llX [%s %s %s] - %s error.\n",
+ addr,
+ stat & MC_ERR_SWAP ? "Swap, " : "",
+ stat & MC_ERR_SECURITY ? "Sec, " : "",
+ stat & MC_ERR_RW ? "Write" : "Read",
+ smmu_err_tbl[MC_ERR_TYPE(err)]);
+ }
+ WR4(sc, MC_INTSTATUS, stat);
+}
+
+static void
+tegra_mc_init_hw(struct tegra_mc_softc *sc)
+{
+
+ /* Disable and acknowledge all interrupts */
+ WR4(sc, MC_INTMASK, 0);
+ WR4(sc, MC_INTSTATUS, MC_INT_INT_MASK);
+}
+
+static int
+tegra_mc_probe(device_t dev)
+{
+ if (!ofw_bus_status_okay(dev))
+ return (ENXIO);
+
+ if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
+ return (ENXIO);
+ device_set_desc(dev, "Tegra Memory Controller");
+ return (BUS_PROBE_DEFAULT);
+}
+
+static int
+tegra_mc_attach(device_t dev)
+{
+ int rv, rid;
+ struct tegra_mc_softc *sc;
+
+ sc = device_get_softc(dev);
+ sc->dev = dev;
+
+ LOCK_INIT(sc);
+
+ /* Get the memory resource for the register mapping. */
+ rid = 0;
+ sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
+ RF_ACTIVE);
+ if (sc->mem_res == NULL) {
+ device_printf(dev, "Cannot map registers.\n");
+ rv = ENXIO;
+ goto fail;
+ }
+
+ /* Allocate our IRQ resource. */
+ rid = 0;
+ sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
+ RF_ACTIVE);
+ if (sc->irq_res == NULL) {
+ device_printf(dev, "Cannot allocate interrupt.\n");
+ rv = ENXIO;
+ goto fail;
+ }
+
+ /* OFW resources. */
+ rv = clk_get_by_ofw_name(dev, 0, "mc", &sc->clk);
+ if (rv != 0) {
+ device_printf(dev, "Cannot get mc clock: %d\n", rv);
+ goto fail;
+ }
+ rv = clk_enable(sc->clk);
+ if (rv != 0) {
+ device_printf(dev, "Cannot enable clock: %d\n", rv);
+ goto fail;
+ }
+
+ /* Init hardware. */
+ tegra_mc_init_hw(sc);
+
+ /* Setup interrupt */
+ rv = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
+ NULL, tegra_mc_intr, sc, &sc->irq_h);
+ if (rv) {
+ device_printf(dev, "Cannot setup interrupt.\n");
+ goto fail;
+ }
+
+ /* Enable Interrupts */
+ WR4(sc, MC_INTMASK, MC_INT_INT_MASK);
+
+ return (bus_generic_attach(dev));
+
+fail:
+ if (sc->clk != NULL)
+ clk_release(sc->clk);
+ if (sc->irq_h != NULL)
+ bus_teardown_intr(dev, sc->irq_res, sc->irq_h);
+ if (sc->irq_res != NULL)
+ bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
+ if (sc->mem_res != NULL)
+ bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->mem_res);
+ LOCK_DESTROY(sc);
+
+ return (rv);
+}
+
+static int
+tegra_mc_detach(device_t dev)
+{
+ struct tegra_mc_softc *sc;
+
+ sc = device_get_softc(dev);
+ if (sc->irq_h != NULL)
+ bus_teardown_intr(dev, sc->irq_res, sc->irq_h);
+ if (sc->irq_res != NULL)
+ bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
+ if (sc->mem_res != NULL)
+ bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->mem_res);
+
+ LOCK_DESTROY(sc);
+ return (bus_generic_detach(dev));
+}
+
+static device_method_t tegra_mc_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, tegra_mc_probe),
+ DEVMETHOD(device_attach, tegra_mc_attach),
+ DEVMETHOD(device_detach, tegra_mc_detach),
+
+
+ DEVMETHOD_END
+};
+
+static devclass_t tegra_mc_devclass;
+static DEFINE_CLASS_0(mc, tegra_mc_driver, tegra_mc_methods,
+ sizeof(struct tegra_mc_softc));
+DRIVER_MODULE(tegra_mc, simplebus, tegra_mc_driver, tegra_mc_devclass,
+ NULL, NULL);
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