memory: tegra: Add Tegra186 support

The memory controller found on Tegra186 is different in some respects to
its predecessors. Most notably it no longer implements an SMMU, but does
assign ARM SMMU stream IDs for each memory client instead.

Provide a driver that programs these registers so that memory clients
can translate addresses via the ARM SMMU.
Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/memory/tegra/Makefile

@@ -10,3 +10,4 @@ tegra-mc-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210.o
 obj-$(CONFIG_TEGRA_MC) += tegra-mc.o
 
 obj-$(CONFIG_TEGRA124_EMC) += tegra124-emc.o
+obj-$(CONFIG_ARCH_TEGRA_186_SOC) += tegra186.o

drivers/memory/tegra/tegra186.c

+/*
+ * Copyright (C) 2017 NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <dt-bindings/memory/tegra186-mc.h>
+
+struct tegra_mc {
+	struct device *dev;
+	void __iomem *regs;
+};
+
+struct tegra_mc_client {
+	const char *name;
+	unsigned int sid;
+	struct {
+		unsigned int override;
+		unsigned int security;
+	} regs;
+};
+
+static const struct tegra_mc_client tegra186_mc_clients[] = {
+	{
+		.name = "ptcr",
+		.sid = TEGRA186_SID_PASSTHROUGH,
+		.regs = {
+			.override = 0x000,
+			.security = 0x004,
+		},
+	}, {
+		.name = "afir",
+		.sid = TEGRA186_SID_AFI,
+		.regs = {
+			.override = 0x070,
+			.security = 0x074,
+		},
+	}, {
+		.name = "hdar",
+		.sid = TEGRA186_SID_HDA,
+		.regs = {
+			.override = 0x0a8,
+			.security = 0x0ac,
+		},
+	}, {
+		.name = "host1xdmar",
+		.sid = TEGRA186_SID_HOST1X,
+		.regs = {
+			.override = 0x0b0,
+			.security = 0x0b4,
+		},
+	}, {
+		.name = "nvencsrd",
+		.sid = TEGRA186_SID_NVENC,
+		.regs = {
+			.override = 0x0e0,
+			.security = 0x0e4,
+		},
+	}, {
+		.name = "satar",
+		.sid = TEGRA186_SID_SATA,
+		.regs = {
+			.override = 0x0f8,
+			.security = 0x0fc,
+		},
+	}, {
+		.name = "mpcorer",
+		.sid = TEGRA186_SID_PASSTHROUGH,
+		.regs = {
+			.override = 0x138,
+			.security = 0x13c,
+		},
+	}, {
+		.name = "nvencswr",
+		.sid = TEGRA186_SID_NVENC,
+		.regs = {
+			.override = 0x158,
+			.security = 0x15c,
+		},
+	}, {
+		.name = "afiw",
+		.sid = TEGRA186_SID_AFI,
+		.regs = {
+			.override = 0x188,
+			.security = 0x18c,
+		},
+	}, {
+		.name = "hdaw",
+		.sid = TEGRA186_SID_HDA,
+		.regs = {
+			.override = 0x1a8,
+			.security = 0x1ac,
+		},
+	}, {
+		.name = "mpcorew",
+		.sid = TEGRA186_SID_PASSTHROUGH,
+		.regs = {
+			.override = 0x1c8,
+			.security = 0x1cc,
+		},
+	}, {
+		.name = "sataw",
+		.sid = TEGRA186_SID_SATA,
+		.regs = {
+			.override = 0x1e8,
+			.security = 0x1ec,
+		},
+	}, {
+		.name = "ispra",
+		.sid = TEGRA186_SID_ISP,
+		.regs = {
+			.override = 0x220,
+			.security = 0x224,
+		},
+	}, {
+		.name = "ispwa",
+		.sid = TEGRA186_SID_ISP,
+		.regs = {
+			.override = 0x230,
+			.security = 0x234,
+		},
+	}, {
+		.name = "ispwb",
+		.sid = TEGRA186_SID_ISP,
+		.regs = {
+			.override = 0x238,
+			.security = 0x23c,
+		},
+	}, {
+		.name = "xusb_hostr",
+		.sid = TEGRA186_SID_XUSB_HOST,
+		.regs = {
+			.override = 0x250,
+			.security = 0x254,
+		},
+	}, {
+		.name = "xusb_hostw",
+		.sid = TEGRA186_SID_XUSB_HOST,
+		.regs = {
+			.override = 0x258,
+			.security = 0x25c,
+		},
+	}, {
+		.name = "xusb_devr",
+		.sid = TEGRA186_SID_XUSB_DEV,
+		.regs = {
+			.override = 0x260,
+			.security = 0x264,
+		},
+	}, {
+		.name = "xusb_devw",
+		.sid = TEGRA186_SID_XUSB_DEV,
+		.regs = {
+			.override = 0x268,
+			.security = 0x26c,
+		},
+	}, {
+		.name = "tsecsrd",
+		.sid = TEGRA186_SID_TSEC,
+		.regs = {
+			.override = 0x2a0,
+			.security = 0x2a4,
+		},
+	}, {
+		.name = "tsecswr",
+		.sid = TEGRA186_SID_TSEC,
+		.regs = {
+			.override = 0x2a8,
+			.security = 0x2ac,
+		},
+	}, {
+		.name = "gpusrd",
+		.sid = TEGRA186_SID_GPU,
+		.regs = {
+			.override = 0x2c0,
+			.security = 0x2c4,
+		},
+	}, {
+		.name = "gpuswr",
+		.sid = TEGRA186_SID_GPU,
+		.regs = {
+			.override = 0x2c8,
+			.security = 0x2cc,
+		},
+	}, {
+		.name = "sdmmcra",
+		.sid = TEGRA186_SID_SDMMC1,
+		.regs = {
+			.override = 0x300,
+			.security = 0x304,
+		},
+	}, {
+		.name = "sdmmcraa",
+		.sid = TEGRA186_SID_SDMMC2,
+		.regs = {
+			.override = 0x308,
+			.security = 0x30c,
+		},
+	}, {
+		.name = "sdmmcr",
+		.sid = TEGRA186_SID_SDMMC3,
+		.regs = {
+			.override = 0x310,
+			.security = 0x314,
+		},
+	}, {
+		.name = "sdmmcrab",
+		.sid = TEGRA186_SID_SDMMC4,
+		.regs = {
+			.override = 0x318,
+			.security = 0x31c,
+		},
+	}, {
+		.name = "sdmmcwa",
+		.sid = TEGRA186_SID_SDMMC1,
+		.regs = {
+			.override = 0x320,
+			.security = 0x324,
+		},
+	}, {
+		.name = "sdmmcwaa",
+		.sid = TEGRA186_SID_SDMMC2,
+		.regs = {
+			.override = 0x328,
+			.security = 0x32c,
+		},
+	}, {
+		.name = "sdmmcw",
+		.sid = TEGRA186_SID_SDMMC3,
+		.regs = {
+			.override = 0x330,
+			.security = 0x334,
+		},
+	}, {
+		.name = "sdmmcwab",
+		.sid = TEGRA186_SID_SDMMC4,
+		.regs = {
+			.override = 0x338,
+			.security = 0x33c,
+		},
+	}, {
+		.name = "vicsrd",
+		.sid = TEGRA186_SID_VIC,
+		.regs = {
+			.override = 0x360,
+			.security = 0x364,
+		},
+	}, {
+		.name = "vicswr",
+		.sid = TEGRA186_SID_VIC,
+		.regs = {
+			.override = 0x368,
+			.security = 0x36c,
+		},
+	}, {
+		.name = "viw",
+		.sid = TEGRA186_SID_VI,
+		.regs = {
+			.override = 0x390,
+			.security = 0x394,
+		},
+	}, {
+		.name = "nvdecsrd",
+		.sid = TEGRA186_SID_NVDEC,
+		.regs = {
+			.override = 0x3c0,
+			.security = 0x3c4,
+		},
+	}, {
+		.name = "nvdecswr",
+		.sid = TEGRA186_SID_NVDEC,
+		.regs = {
+			.override = 0x3c8,
+			.security = 0x3cc,
+		},
+	}, {
+		.name = "aper",
+		.sid = TEGRA186_SID_APE,
+		.regs = {
+			.override = 0x3d0,
+			.security = 0x3d4,
+		},
+	}, {
+		.name = "apew",
+		.sid = TEGRA186_SID_APE,
+		.regs = {
+			.override = 0x3d8,
+			.security = 0x3dc,
+		},
+	}, {
+		.name = "nvjpgsrd",
+		.sid = TEGRA186_SID_NVJPG,
+		.regs = {
+			.override = 0x3f0,
+			.security = 0x3f4,
+		},
+	}, {
+		.name = "nvjpgswr",
+		.sid = TEGRA186_SID_NVJPG,
+		.regs = {
+			.override = 0x3f8,
+			.security = 0x3fc,
+		},
+	}, {
+		.name = "sesrd",
+		.sid = TEGRA186_SID_SE,
+		.regs = {
+			.override = 0x400,
+			.security = 0x404,
+		},
+	}, {
+		.name = "seswr",
+		.sid = TEGRA186_SID_SE,
+		.regs = {
+			.override = 0x408,
+			.security = 0x40c,
+		},
+	}, {
+		.name = "etrr",
+		.sid = TEGRA186_SID_ETR,
+		.regs = {
+			.override = 0x420,
+			.security = 0x424,
+		},
+	}, {
+		.name = "etrw",
+		.sid = TEGRA186_SID_ETR,
+		.regs = {
+			.override = 0x428,
+			.security = 0x42c,
+		},
+	}, {
+		.name = "tsecsrdb",
+		.sid = TEGRA186_SID_TSECB,
+		.regs = {
+			.override = 0x430,
+			.security = 0x434,
+		},
+	}, {
+		.name = "tsecswrb",
+		.sid = TEGRA186_SID_TSECB,
+		.regs = {
+			.override = 0x438,
+			.security = 0x43c,
+		},
+	}, {
+		.name = "gpusrd2",
+		.sid = TEGRA186_SID_GPU,
+		.regs = {
+			.override = 0x440,
+			.security = 0x444,
+		},
+	}, {
+		.name = "gpuswr2",
+		.sid = TEGRA186_SID_GPU,
+		.regs = {
+			.override = 0x448,
+			.security = 0x44c,
+		},
+	}, {
+		.name = "axisr",
+		.sid = TEGRA186_SID_GPCDMA_0,
+		.regs = {
+			.override = 0x460,
+			.security = 0x464,
+		},
+	}, {
+		.name = "axisw",
+		.sid = TEGRA186_SID_GPCDMA_0,
+		.regs = {
+			.override = 0x468,
+			.security = 0x46c,
+		},
+	}, {
+		.name = "eqosr",
+		.sid = TEGRA186_SID_EQOS,
+		.regs = {
+			.override = 0x470,
+			.security = 0x474,
+		},
+	}, {
+		.name = "eqosw",
+		.sid = TEGRA186_SID_EQOS,
+		.regs = {
+			.override = 0x478,
+			.security = 0x47c,
+		},
+	}, {
+		.name = "ufshcr",
+		.sid = TEGRA186_SID_UFSHC,
+		.regs = {
+			.override = 0x480,
+			.security = 0x484,
+		},
+	}, {
+		.name = "ufshcw",
+		.sid = TEGRA186_SID_UFSHC,
+		.regs = {
+			.override = 0x488,
+			.security = 0x48c,
+		},
+	}, {
+		.name = "nvdisplayr",
+		.sid = TEGRA186_SID_NVDISPLAY,
+		.regs = {
+			.override = 0x490,
+			.security = 0x494,
+		},
+	}, {
+		.name = "bpmpr",
+		.sid = TEGRA186_SID_BPMP,
+		.regs = {
+			.override = 0x498,
+			.security = 0x49c,
+		},
+	}, {
+		.name = "bpmpw",
+		.sid = TEGRA186_SID_BPMP,
+		.regs = {
+			.override = 0x4a0,
+			.security = 0x4a4,
+		},
+	}, {
+		.name = "bpmpdmar",
+		.sid = TEGRA186_SID_BPMP,
+		.regs = {
+			.override = 0x4a8,
+			.security = 0x4ac,
+		},
+	}, {
+		.name = "bpmpdmaw",
+		.sid = TEGRA186_SID_BPMP,
+		.regs = {
+			.override = 0x4b0,
+			.security = 0x4b4,
+		},
+	}, {
+		.name = "aonr",
+		.sid = TEGRA186_SID_AON,
+		.regs = {
+			.override = 0x4b8,
+			.security = 0x4bc,
+		},
+	}, {
+		.name = "aonw",
+		.sid = TEGRA186_SID_AON,
+		.regs = {
+			.override = 0x4c0,
+			.security = 0x4c4,
+		},
+	}, {
+		.name = "aondmar",
+		.sid = TEGRA186_SID_AON,
+		.regs = {
+			.override = 0x4c8,
+			.security = 0x4cc,
+		},
+	}, {
+		.name = "aondmaw",
+		.sid = TEGRA186_SID_AON,
+		.regs = {
+			.override = 0x4d0,
+			.security = 0x4d4,
+		},
+	}, {
+		.name = "scer",
+		.sid = TEGRA186_SID_SCE,
+		.regs = {
+			.override = 0x4d8,
+			.security = 0x4dc,
+		},
+	}, {
+		.name = "scew",
+		.sid = TEGRA186_SID_SCE,
+		.regs = {
+			.override = 0x4e0,
+			.security = 0x4e4,
+		},
+	}, {
+		.name = "scedmar",
+		.sid = TEGRA186_SID_SCE,
+		.regs = {
+			.override = 0x4e8,
+			.security = 0x4ec,
+		},
+	}, {
+		.name = "scedmaw",
+		.sid = TEGRA186_SID_SCE,
+		.regs = {
+			.override = 0x4f0,
+			.security = 0x4f4,
+		},
+	}, {
+		.name = "apedmar",
+		.sid = TEGRA186_SID_APE,
+		.regs = {
+			.override = 0x4f8,
+			.security = 0x4fc,
+		},
+	}, {
+		.name = "apedmaw",
+		.sid = TEGRA186_SID_APE,
+		.regs = {
+			.override = 0x500,
+			.security = 0x504,
+		},
+	}, {
+		.name = "nvdisplayr1",
+		.sid = TEGRA186_SID_NVDISPLAY,
+		.regs = {
+			.override = 0x508,
+			.security = 0x50c,
+		},
+	}, {
+		.name = "vicsrd1",
+		.sid = TEGRA186_SID_VIC,
+		.regs = {
+			.override = 0x510,
+			.security = 0x514,
+		},
+	}, {
+		.name = "nvdecsrd1",
+		.sid = TEGRA186_SID_NVDEC,
+		.regs = {
+			.override = 0x518,
+			.security = 0x51c,
+		},
+	},
+};
+
+static int tegra186_mc_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	struct tegra_mc *mc;
+	unsigned int i;
+	int err = 0;
+
+	mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL);
+	if (!mc)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	mc->regs = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(mc->regs))
+		return PTR_ERR(mc->regs);
+
+	mc->dev = &pdev->dev;
+
+	for (i = 0; i < ARRAY_SIZE(tegra186_mc_clients); i++) {
+		const struct tegra_mc_client *client = &tegra186_mc_clients[i];
+		u32 override, security;
+
+		override = readl(mc->regs + client->regs.override);
+		security = readl(mc->regs + client->regs.security);
+
+		dev_dbg(&pdev->dev, "client %s: override: %x security: %x\n",
+			client->name, override, security);
+
+		dev_dbg(&pdev->dev, "setting SID %u for %s\n", client->sid,
+			client->name);
+		writel(client->sid, mc->regs + client->regs.override);
+
+		override = readl(mc->regs + client->regs.override);
+		security = readl(mc->regs + client->regs.security);
+
+		dev_dbg(&pdev->dev, "client %s: override: %x security: %x\n",
+			client->name, override, security);
+	}
+
+	platform_set_drvdata(pdev, mc);
+
+	return err;
+}
+
+static const struct of_device_id tegra186_mc_of_match[] = {
+	{ .compatible = "nvidia,tegra186-mc", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, tegra186_mc_of_match);
+
+static struct platform_driver tegra186_mc_driver = {
+	.driver = {
+		.name = "tegra186-mc",
+		.of_match_table = tegra186_mc_of_match,
+		.suppress_bind_attrs = true,
+	},
+	.prevent_deferred_probe = true,
+	.probe = tegra186_mc_probe,
+};
+module_platform_driver(tegra186_mc_driver);
+
+MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
+MODULE_DESCRIPTION("NVIDIA Tegra186 Memory Controller driver");
+MODULE_LICENSE("GPL v2");