mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 03:10:12 +00:00
![Nathan Chancellor](/assets/img/avatar_default.png)
Clang emits a warning about this construct: drivers/crypto/ccp/sp-platform.c:36:36: warning: tentative array definition assumed to have one element static const struct acpi_device_id sp_acpi_match[]; ^ 1 warning generated. Just remove the forward declarations and move the initializations up so that they can be used in sp_get_of_version and sp_get_acpi_version. Reported-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Acked-by: Gary R Hook <gary.hook@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
253 lines
5.2 KiB
C
253 lines
5.2 KiB
C
/*
|
|
* AMD Secure Processor device driver
|
|
*
|
|
* Copyright (C) 2014,2016 Advanced Micro Devices, Inc.
|
|
*
|
|
* Author: Tom Lendacky <thomas.lendacky@amd.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/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/device.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/kthread.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/ccp.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/acpi.h>
|
|
|
|
#include "ccp-dev.h"
|
|
|
|
struct sp_platform {
|
|
int coherent;
|
|
unsigned int irq_count;
|
|
};
|
|
|
|
static const struct sp_dev_vdata dev_vdata[] = {
|
|
{
|
|
.bar = 0,
|
|
#ifdef CONFIG_CRYPTO_DEV_SP_CCP
|
|
.ccp_vdata = &ccpv3_platform,
|
|
#endif
|
|
},
|
|
};
|
|
|
|
#ifdef CONFIG_ACPI
|
|
static const struct acpi_device_id sp_acpi_match[] = {
|
|
{ "AMDI0C00", (kernel_ulong_t)&dev_vdata[0] },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, sp_acpi_match);
|
|
#endif
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id sp_of_match[] = {
|
|
{ .compatible = "amd,ccp-seattle-v1a",
|
|
.data = (const void *)&dev_vdata[0] },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, sp_of_match);
|
|
#endif
|
|
|
|
static struct sp_dev_vdata *sp_get_of_version(struct platform_device *pdev)
|
|
{
|
|
#ifdef CONFIG_OF
|
|
const struct of_device_id *match;
|
|
|
|
match = of_match_node(sp_of_match, pdev->dev.of_node);
|
|
if (match && match->data)
|
|
return (struct sp_dev_vdata *)match->data;
|
|
#endif
|
|
return NULL;
|
|
}
|
|
|
|
static struct sp_dev_vdata *sp_get_acpi_version(struct platform_device *pdev)
|
|
{
|
|
#ifdef CONFIG_ACPI
|
|
const struct acpi_device_id *match;
|
|
|
|
match = acpi_match_device(sp_acpi_match, &pdev->dev);
|
|
if (match && match->driver_data)
|
|
return (struct sp_dev_vdata *)match->driver_data;
|
|
#endif
|
|
return NULL;
|
|
}
|
|
|
|
static int sp_get_irqs(struct sp_device *sp)
|
|
{
|
|
struct sp_platform *sp_platform = sp->dev_specific;
|
|
struct device *dev = sp->dev;
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
unsigned int i, count;
|
|
int ret;
|
|
|
|
for (i = 0, count = 0; i < pdev->num_resources; i++) {
|
|
struct resource *res = &pdev->resource[i];
|
|
|
|
if (resource_type(res) == IORESOURCE_IRQ)
|
|
count++;
|
|
}
|
|
|
|
sp_platform->irq_count = count;
|
|
|
|
ret = platform_get_irq(pdev, 0);
|
|
if (ret < 0) {
|
|
dev_notice(dev, "unable to get IRQ (%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
sp->psp_irq = ret;
|
|
if (count == 1) {
|
|
sp->ccp_irq = ret;
|
|
} else {
|
|
ret = platform_get_irq(pdev, 1);
|
|
if (ret < 0) {
|
|
dev_notice(dev, "unable to get IRQ (%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
sp->ccp_irq = ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sp_platform_probe(struct platform_device *pdev)
|
|
{
|
|
struct sp_device *sp;
|
|
struct sp_platform *sp_platform;
|
|
struct device *dev = &pdev->dev;
|
|
enum dev_dma_attr attr;
|
|
struct resource *ior;
|
|
int ret;
|
|
|
|
ret = -ENOMEM;
|
|
sp = sp_alloc_struct(dev);
|
|
if (!sp)
|
|
goto e_err;
|
|
|
|
sp_platform = devm_kzalloc(dev, sizeof(*sp_platform), GFP_KERNEL);
|
|
if (!sp_platform)
|
|
goto e_err;
|
|
|
|
sp->dev_specific = sp_platform;
|
|
sp->dev_vdata = pdev->dev.of_node ? sp_get_of_version(pdev)
|
|
: sp_get_acpi_version(pdev);
|
|
if (!sp->dev_vdata) {
|
|
ret = -ENODEV;
|
|
dev_err(dev, "missing driver data\n");
|
|
goto e_err;
|
|
}
|
|
|
|
ior = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
sp->io_map = devm_ioremap_resource(dev, ior);
|
|
if (IS_ERR(sp->io_map)) {
|
|
ret = PTR_ERR(sp->io_map);
|
|
goto e_err;
|
|
}
|
|
|
|
attr = device_get_dma_attr(dev);
|
|
if (attr == DEV_DMA_NOT_SUPPORTED) {
|
|
dev_err(dev, "DMA is not supported");
|
|
goto e_err;
|
|
}
|
|
|
|
sp_platform->coherent = (attr == DEV_DMA_COHERENT);
|
|
if (sp_platform->coherent)
|
|
sp->axcache = CACHE_WB_NO_ALLOC;
|
|
else
|
|
sp->axcache = CACHE_NONE;
|
|
|
|
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48));
|
|
if (ret) {
|
|
dev_err(dev, "dma_set_mask_and_coherent failed (%d)\n", ret);
|
|
goto e_err;
|
|
}
|
|
|
|
ret = sp_get_irqs(sp);
|
|
if (ret)
|
|
goto e_err;
|
|
|
|
dev_set_drvdata(dev, sp);
|
|
|
|
ret = sp_init(sp);
|
|
if (ret)
|
|
goto e_err;
|
|
|
|
dev_notice(dev, "enabled\n");
|
|
|
|
return 0;
|
|
|
|
e_err:
|
|
dev_notice(dev, "initialization failed\n");
|
|
return ret;
|
|
}
|
|
|
|
static int sp_platform_remove(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct sp_device *sp = dev_get_drvdata(dev);
|
|
|
|
sp_destroy(sp);
|
|
|
|
dev_notice(dev, "disabled\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int sp_platform_suspend(struct platform_device *pdev,
|
|
pm_message_t state)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct sp_device *sp = dev_get_drvdata(dev);
|
|
|
|
return sp_suspend(sp, state);
|
|
}
|
|
|
|
static int sp_platform_resume(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct sp_device *sp = dev_get_drvdata(dev);
|
|
|
|
return sp_resume(sp);
|
|
}
|
|
#endif
|
|
|
|
static struct platform_driver sp_platform_driver = {
|
|
.driver = {
|
|
.name = "ccp",
|
|
#ifdef CONFIG_ACPI
|
|
.acpi_match_table = sp_acpi_match,
|
|
#endif
|
|
#ifdef CONFIG_OF
|
|
.of_match_table = sp_of_match,
|
|
#endif
|
|
},
|
|
.probe = sp_platform_probe,
|
|
.remove = sp_platform_remove,
|
|
#ifdef CONFIG_PM
|
|
.suspend = sp_platform_suspend,
|
|
.resume = sp_platform_resume,
|
|
#endif
|
|
};
|
|
|
|
int sp_platform_init(void)
|
|
{
|
|
return platform_driver_register(&sp_platform_driver);
|
|
}
|
|
|
|
void sp_platform_exit(void)
|
|
{
|
|
platform_driver_unregister(&sp_platform_driver);
|
|
}
|