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path: root/drivers/crypto/ccp/ccp-platform.c
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Diffstat (limited to 'drivers/crypto/ccp/ccp-platform.c')
-rw-r--r--drivers/crypto/ccp/ccp-platform.c293
1 files changed, 0 insertions, 293 deletions
diff --git a/drivers/crypto/ccp/ccp-platform.c b/drivers/crypto/ccp/ccp-platform.c
deleted file mode 100644
index e26969e601ad..000000000000
--- a/drivers/crypto/ccp/ccp-platform.c
+++ /dev/null
@@ -1,293 +0,0 @@
-/*
- * AMD Cryptographic Coprocessor (CCP) 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 ccp_platform {
- int coherent;
-};
-
-static const struct acpi_device_id ccp_acpi_match[];
-static const struct of_device_id ccp_of_match[];
-
-static struct ccp_vdata *ccp_get_of_version(struct platform_device *pdev)
-{
-#ifdef CONFIG_OF
- const struct of_device_id *match;
-
- match = of_match_node(ccp_of_match, pdev->dev.of_node);
- if (match && match->data)
- return (struct ccp_vdata *)match->data;
-#endif
- return NULL;
-}
-
-static struct ccp_vdata *ccp_get_acpi_version(struct platform_device *pdev)
-{
-#ifdef CONFIG_ACPI
- const struct acpi_device_id *match;
-
- match = acpi_match_device(ccp_acpi_match, &pdev->dev);
- if (match && match->driver_data)
- return (struct ccp_vdata *)match->driver_data;
-#endif
- return NULL;
-}
-
-static int ccp_get_irq(struct ccp_device *ccp)
-{
- struct device *dev = ccp->dev;
- struct platform_device *pdev = to_platform_device(dev);
- int ret;
-
- ret = platform_get_irq(pdev, 0);
- if (ret < 0)
- return ret;
-
- ccp->irq = ret;
- ret = request_irq(ccp->irq, ccp->vdata->perform->irqhandler, 0,
- ccp->name, dev);
- if (ret) {
- dev_notice(dev, "unable to allocate IRQ (%d)\n", ret);
- return ret;
- }
-
- return 0;
-}
-
-static int ccp_get_irqs(struct ccp_device *ccp)
-{
- struct device *dev = ccp->dev;
- int ret;
-
- ret = ccp_get_irq(ccp);
- if (!ret)
- return 0;
-
- /* Couldn't get an interrupt */
- dev_notice(dev, "could not enable interrupts (%d)\n", ret);
-
- return ret;
-}
-
-static void ccp_free_irqs(struct ccp_device *ccp)
-{
- struct device *dev = ccp->dev;
-
- free_irq(ccp->irq, dev);
-}
-
-static struct resource *ccp_find_mmio_area(struct ccp_device *ccp)
-{
- struct device *dev = ccp->dev;
- struct platform_device *pdev = to_platform_device(dev);
- struct resource *ior;
-
- ior = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (ior && (resource_size(ior) >= 0x800))
- return ior;
-
- return NULL;
-}
-
-static int ccp_platform_probe(struct platform_device *pdev)
-{
- struct ccp_device *ccp;
- struct ccp_platform *ccp_platform;
- struct device *dev = &pdev->dev;
- enum dev_dma_attr attr;
- struct resource *ior;
- int ret;
-
- ret = -ENOMEM;
- ccp = ccp_alloc_struct(dev);
- if (!ccp)
- goto e_err;
-
- ccp_platform = devm_kzalloc(dev, sizeof(*ccp_platform), GFP_KERNEL);
- if (!ccp_platform)
- goto e_err;
-
- ccp->dev_specific = ccp_platform;
- ccp->vdata = pdev->dev.of_node ? ccp_get_of_version(pdev)
- : ccp_get_acpi_version(pdev);
- if (!ccp->vdata || !ccp->vdata->version) {
- ret = -ENODEV;
- dev_err(dev, "missing driver data\n");
- goto e_err;
- }
- ccp->get_irq = ccp_get_irqs;
- ccp->free_irq = ccp_free_irqs;
-
- ior = ccp_find_mmio_area(ccp);
- ccp->io_map = devm_ioremap_resource(dev, ior);
- if (IS_ERR(ccp->io_map)) {
- ret = PTR_ERR(ccp->io_map);
- goto e_err;
- }
- ccp->io_regs = ccp->io_map;
-
- attr = device_get_dma_attr(dev);
- if (attr == DEV_DMA_NOT_SUPPORTED) {
- dev_err(dev, "DMA is not supported");
- goto e_err;
- }
-
- ccp_platform->coherent = (attr == DEV_DMA_COHERENT);
- if (ccp_platform->coherent)
- ccp->axcache = CACHE_WB_NO_ALLOC;
- else
- ccp->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;
- }
-
- dev_set_drvdata(dev, ccp);
-
- ret = ccp->vdata->perform->init(ccp);
- if (ret)
- goto e_err;
-
- dev_notice(dev, "enabled\n");
-
- return 0;
-
-e_err:
- dev_notice(dev, "initialization failed\n");
- return ret;
-}
-
-static int ccp_platform_remove(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct ccp_device *ccp = dev_get_drvdata(dev);
-
- ccp->vdata->perform->destroy(ccp);
-
- dev_notice(dev, "disabled\n");
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-static int ccp_platform_suspend(struct platform_device *pdev,
- pm_message_t state)
-{
- struct device *dev = &pdev->dev;
- struct ccp_device *ccp = dev_get_drvdata(dev);
- unsigned long flags;
- unsigned int i;
-
- spin_lock_irqsave(&ccp->cmd_lock, flags);
-
- ccp->suspending = 1;
-
- /* Wake all the queue kthreads to prepare for suspend */
- for (i = 0; i < ccp->cmd_q_count; i++)
- wake_up_process(ccp->cmd_q[i].kthread);
-
- spin_unlock_irqrestore(&ccp->cmd_lock, flags);
-
- /* Wait for all queue kthreads to say they're done */
- while (!ccp_queues_suspended(ccp))
- wait_event_interruptible(ccp->suspend_queue,
- ccp_queues_suspended(ccp));
-
- return 0;
-}
-
-static int ccp_platform_resume(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct ccp_device *ccp = dev_get_drvdata(dev);
- unsigned long flags;
- unsigned int i;
-
- spin_lock_irqsave(&ccp->cmd_lock, flags);
-
- ccp->suspending = 0;
-
- /* Wake up all the kthreads */
- for (i = 0; i < ccp->cmd_q_count; i++) {
- ccp->cmd_q[i].suspended = 0;
- wake_up_process(ccp->cmd_q[i].kthread);
- }
-
- spin_unlock_irqrestore(&ccp->cmd_lock, flags);
-
- return 0;
-}
-#endif
-
-#ifdef CONFIG_ACPI
-static const struct acpi_device_id ccp_acpi_match[] = {
- { "AMDI0C00", (kernel_ulong_t)&ccpv3 },
- { },
-};
-MODULE_DEVICE_TABLE(acpi, ccp_acpi_match);
-#endif
-
-#ifdef CONFIG_OF
-static const struct of_device_id ccp_of_match[] = {
- { .compatible = "amd,ccp-seattle-v1a",
- .data = (const void *)&ccpv3 },
- { },
-};
-MODULE_DEVICE_TABLE(of, ccp_of_match);
-#endif
-
-static struct platform_driver ccp_platform_driver = {
- .driver = {
- .name = "ccp",
-#ifdef CONFIG_ACPI
- .acpi_match_table = ccp_acpi_match,
-#endif
-#ifdef CONFIG_OF
- .of_match_table = ccp_of_match,
-#endif
- },
- .probe = ccp_platform_probe,
- .remove = ccp_platform_remove,
-#ifdef CONFIG_PM
- .suspend = ccp_platform_suspend,
- .resume = ccp_platform_resume,
-#endif
-};
-
-int ccp_platform_init(void)
-{
- return platform_driver_register(&ccp_platform_driver);
-}
-
-void ccp_platform_exit(void)
-{
- platform_driver_unregister(&ccp_platform_driver);
-}
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-08 14:14:27 +0300