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Diffstat (limited to 'drivers/iommu/intel-iommu.c')
-rw-r--r--drivers/iommu/intel-iommu.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 68d43beccb7e..2ffe58969944 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -696,6 +696,11 @@ static inline struct context_entry *iommu_context_addr(struct intel_iommu *iommu
return &context[devfn];
}
+static int iommu_dummy(struct device *dev)
+{
+ return dev->archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO;
+}
+
static struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devfn)
{
struct dmar_drhd_unit *drhd = NULL;
@@ -705,6 +710,9 @@ static struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devf
u16 segment = 0;
int i;
+ if (iommu_dummy(dev))
+ return NULL;
+
if (dev_is_pci(dev)) {
pdev = to_pci_dev(dev);
segment = pci_domain_nr(pdev->bus);
@@ -2969,11 +2977,6 @@ static inline struct dmar_domain *get_valid_domain_for_dev(struct device *dev)
return __get_valid_domain_for_dev(dev);
}
-static int iommu_dummy(struct device *dev)
-{
- return dev->archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO;
-}
-
/* Check if the dev needs to go through non-identity map and unmap process.*/
static int iommu_no_mapping(struct device *dev)
{
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-04 22:42:57 +0000
/a> 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 
/*
 * Intel LPSS PCI support.
 *
 * Copyright (C) 2015, Intel Corporation
 *
 * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
 *          Mika Westerberg <mika.westerberg@linux.intel.com>
 *
 * 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/ioport.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/property.h>

#include "intel-lpss.h"

static int intel_lpss_pci_probe(struct pci_dev *pdev,
				const struct pci_device_id *id)
{
	struct intel_lpss_platform_info *info;
	int ret;

	ret = pcim_enable_device(pdev);
	if (ret)
		return ret;

	info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
			    GFP_KERNEL);
	if (!info)
		return -ENOMEM;

	info->mem = &pdev->resource[0];
	info->irq = pdev->irq;

	/* Probably it is enough to set this for iDMA capable devices only */
	pci_set_master(pdev);

	ret = intel_lpss_probe(&pdev->dev, info);
	if (ret)
		return ret;

	pm_runtime_put(&pdev->dev);
	pm_runtime_allow(&pdev->dev);

	return 0;
}

static void intel_lpss_pci_remove(struct pci_dev *pdev)
{
	pm_runtime_forbid(&pdev->dev);
	pm_runtime_get_sync(&pdev->dev);

	intel_lpss_remove(&pdev->dev);
}

static INTEL_LPSS_PM_OPS(intel_lpss_pci_pm_ops);

static const struct intel_lpss_platform_info spt_info = {
	.clk_rate = 120000000,
};

static struct property_entry spt_i2c_properties[] = {
	PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
	{ },
};

static struct property_set spt_i2c_pset = {
	.properties = spt_i2c_properties,
};

static const struct intel_lpss_platform_info spt_i2c_info = {
	.clk_rate = 120000000,
	.pset = &spt_i2c_pset,
};

static struct property_entry uart_properties[] = {
	PROPERTY_ENTRY_U32("reg-io-width", 4),
	PROPERTY_ENTRY_U32("reg-shift", 2),
	PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
	{ },
};

static struct property_set uart_pset = {
	.properties = uart_properties,
};

static const struct intel_lpss_platform_info spt_uart_info = {
	.clk_rate = 120000000,
	.clk_con_id = "baudclk",
	.pset = &uart_pset,
};

static const struct intel_lpss_platform_info bxt_info = {
	.clk_rate = 100000000,
};

static const struct intel_lpss_platform_info bxt_uart_info = {
	.clk_rate = 100000000,
	.clk_con_id = "baudclk",
	.pset = &uart_pset,
};

static struct property_entry bxt_i2c_properties[] = {
	PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42),
	PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
	PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
	{ },
};

static struct property_set bxt_i2c_pset = {
	.properties = bxt_i2c_properties,
};

static const struct intel_lpss_platform_info bxt_i2c_info = {
	.clk_rate = 133000000,
	.pset = &bxt_i2c_pset,
};

static const struct pci_device_id intel_lpss_pci_ids[] = {
	/* BXT A-Step */
	{ PCI_VDEVICE(INTEL, 0x0aac), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x0aae), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x0ab0), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x0ab2), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x0ab4), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x0ab6), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x0ab8), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x0aba), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x0abc), (kernel_ulong_t)&bxt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x0abe), (kernel_ulong_t)&bxt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x0ac0), (kernel_ulong_t)&bxt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x0ac2), (kernel_ulong_t)&bxt_info },
	{ PCI_VDEVICE(INTEL, 0x0ac4), (kernel_ulong_t)&bxt_info },
	{ PCI_VDEVICE(INTEL, 0x0ac6), (kernel_ulong_t)&bxt_info },
	{ PCI_VDEVICE(INTEL, 0x0aee), (kernel_ulong_t)&bxt_uart_info },
	/* BXT B-Step */
	{ PCI_VDEVICE(INTEL, 0x1aac), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x1aae), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x1ab0), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x1ab2), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x1ab4), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x1ab6), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x1ab8), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x1aba), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x1abc), (kernel_ulong_t)&bxt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x1abe), (kernel_ulong_t)&bxt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x1ac0), (kernel_ulong_t)&bxt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x1ac2), (kernel_ulong_t)&bxt_info },
	{ PCI_VDEVICE(INTEL, 0x1ac4), (kernel_ulong_t)&bxt_info },
	{ PCI_VDEVICE(INTEL, 0x1ac6), (kernel_ulong_t)&bxt_info },
	{ PCI_VDEVICE(INTEL, 0x1aee), (kernel_ulong_t)&bxt_uart_info },

	/* APL */
	{ PCI_VDEVICE(INTEL, 0x5aac), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x5aae), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x5ab0), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x5ab2), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x5ab4), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x5ab6), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x5ab8), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x5aba), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x5abc), (kernel_ulong_t)&bxt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x5abe), (kernel_ulong_t)&bxt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x5ac0), (kernel_ulong_t)&bxt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x5ac2), (kernel_ulong_t)&bxt_info },
	{ PCI_VDEVICE(INTEL, 0x5ac4), (kernel_ulong_t)&bxt_info },
	{ PCI_VDEVICE(INTEL, 0x5ac6), (kernel_ulong_t)&bxt_info },
	{ PCI_VDEVICE(INTEL, 0x5aee), (kernel_ulong_t)&bxt_uart_info },
	/* SPT-LP */
	{ PCI_VDEVICE(INTEL, 0x9d27), (kernel_ulong_t)&spt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x9d28), (kernel_ulong_t)&spt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x9d29), (kernel_ulong_t)&spt_info },
	{ PCI_VDEVICE(INTEL, 0x9d2a), (kernel_ulong_t)&spt_info },
	{ PCI_VDEVICE(INTEL, 0x9d60), (kernel_ulong_t)&spt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x9d61), (kernel_ulong_t)&spt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x9d62), (kernel_ulong_t)&spt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x9d63), (kernel_ulong_t)&spt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x9d64), (kernel_ulong_t)&spt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x9d65), (kernel_ulong_t)&spt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x9d66), (kernel_ulong_t)&spt_uart_info },
	/* SPT-H */
	{ PCI_VDEVICE(INTEL, 0xa127), (kernel_ulong_t)&spt_uart_info },
	{ PCI_VDEVICE(INTEL, 0xa128), (kernel_ulong_t)&spt_uart_info },
	{ PCI_VDEVICE(INTEL, 0xa129), (kernel_ulong_t)&spt_info },
	{ PCI_VDEVICE(INTEL, 0xa12a), (kernel_ulong_t)&spt_info },
	{ PCI_VDEVICE(INTEL, 0xa160), (kernel_ulong_t)&spt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0xa161), (kernel_ulong_t)&spt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0xa166), (kernel_ulong_t)&spt_uart_info },
	{ }
};
MODULE_DEVICE_TABLE(pci, intel_lpss_pci_ids);

static struct pci_driver intel_lpss_pci_driver = {
	.name = "intel-lpss",
	.id_table = intel_lpss_pci_ids,
	.probe = intel_lpss_pci_probe,
	.remove