crypto: ccp - Introduce the AMD Secure Processor device

The CCP device is part of the AMD Secure Processor. In order to expand
the usage of the AMD Secure Processor, create a framework that allows
functional components of the AMD Secure Processor to be initialized and
handled appropriately.
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Acked-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/Kconfig

@@ -540,11 +540,11 @@ config CRYPTO_DEV_ATMEL_ECC
 	  will be called atmel-ecc.
 
 config CRYPTO_DEV_CCP
-	bool "Support for AMD Cryptographic Coprocessor"
+	bool "Support for AMD Secure Processor"
 	depends on ((X86 && PCI) || (ARM64 && (OF_ADDRESS || ACPI))) && HAS_IOMEM
 	help
-	  The AMD Cryptographic Coprocessor provides hardware offload support
-	  for encryption, hashing and related operations.
+	  The AMD Secure Processor provides support for the Cryptographic Coprocessor
+	  (CCP) and the Platform Security Processor (PSP) devices.
 
 if CRYPTO_DEV_CCP
 	source "drivers/crypto/ccp/Kconfig"

drivers/crypto/ccp/Kconfig

 config CRYPTO_DEV_CCP_DD
-	tristate "Cryptographic Coprocessor device driver"
-	depends on CRYPTO_DEV_CCP
+	tristate "Secure Processor device driver"
 	default m
+	help
+	  Provides AMD Secure Processor device driver.
+	  If you choose 'M' here, this module will be called ccp.
+
+config CRYPTO_DEV_SP_CCP
+	bool "Cryptographic Coprocessor device"
+	default y
+	depends on CRYPTO_DEV_CCP_DD
 	select HW_RANDOM
 	select DMA_ENGINE
 	select DMADEVICES
 	select CRYPTO_SHA1
 	select CRYPTO_SHA256
 	help
-	  Provides the interface to use the AMD Cryptographic Coprocessor
-	  which can be used to offload encryption operations such as SHA,
-	  AES and more. If you choose 'M' here, this module will be called
-	  ccp.
+	  Provides the support for AMD Cryptographic Coprocessor (CCP) device
+	  which can be used to offload encryption operations such as SHA, AES
+	  and more.
 
 config CRYPTO_DEV_CCP_CRYPTO
 	tristate "Encryption and hashing offload support"
-	depends on CRYPTO_DEV_CCP_DD
 	default m
+	depends on CRYPTO_DEV_CCP_DD
+	depends on CRYPTO_DEV_SP_CCP
 	select CRYPTO_HASH
 	select CRYPTO_BLKCIPHER
 	select CRYPTO_AUTHENC

drivers/crypto/ccp/Makefile

 obj-$(CONFIG_CRYPTO_DEV_CCP_DD) += ccp.o
-ccp-objs := ccp-dev.o \
+ccp-objs  := sp-dev.o ccp-platform.o
+ccp-$(CONFIG_CRYPTO_DEV_SP_CCP) += ccp-dev.o \
 	    ccp-ops.o \
 	    ccp-dev-v3.o \
 	    ccp-dev-v5.o \
-	    ccp-platform.o \
 	    ccp-dmaengine.o \
 	    ccp-debugfs.o
 ccp-$(CONFIG_PCI) += ccp-pci.o

drivers/crypto/ccp/ccp-dev-v3.c

@@ -359,8 +359,7 @@ static void ccp_irq_bh(unsigned long data)
 
 static irqreturn_t ccp_irq_handler(int irq, void *data)
 {
-	struct device *dev = data;
-	struct ccp_device *ccp = dev_get_drvdata(dev);
+	struct ccp_device *ccp = (struct ccp_device *)data;
 
 	ccp_disable_queue_interrupts(ccp);
 	if (ccp->use_tasklet)
@@ -597,6 +596,5 @@ const struct ccp_vdata ccpv3 = {
 	.version = CCP_VERSION(3, 0),
 	.setup = NULL,
 	.perform = &ccp3_actions,
-	.bar = 2,
 	.offset = 0x20000,
 };

drivers/crypto/ccp/ccp-dev-v5.c

@@ -769,8 +769,7 @@ static void ccp5_irq_bh(unsigned long data)
 
 static irqreturn_t ccp5_irq_handler(int irq, void *data)
 {
-	struct device *dev = data;
-	struct ccp_device *ccp = dev_get_drvdata(dev);
+	struct ccp_device *ccp = (struct ccp_device *)data;
 
 	ccp5_disable_queue_interrupts(ccp);
 	ccp->total_interrupts++;
@@ -1113,7 +1112,6 @@ const struct ccp_vdata ccpv5a = {
 	.version = CCP_VERSION(5, 0),
 	.setup = ccp5_config,
 	.perform = &ccp5_actions,
-	.bar = 2,
 	.offset = 0x0,
 };
 
@@ -1122,6 +1120,5 @@ const struct ccp_vdata ccpv5b = {
 	.dma_chan_attr = DMA_PRIVATE,
 	.setup = ccp5other_config,
 	.perform = &ccp5_actions,
-	.bar = 2,
 	.offset = 0x0,
 };

drivers/crypto/ccp/ccp-dev.c

@@ -111,13 +111,6 @@ static LIST_HEAD(ccp_units);
 static DEFINE_SPINLOCK(ccp_rr_lock);
 static struct ccp_device *ccp_rr;
 
-/* Ever-increasing value to produce unique unit numbers */
-static atomic_t ccp_unit_ordinal;
-static unsigned int ccp_increment_unit_ordinal(void)
-{
-	return atomic_inc_return(&ccp_unit_ordinal);
-}
-
 /**
  * ccp_add_device - add a CCP device to the list
  *
@@ -465,14 +458,17 @@ int ccp_cmd_queue_thread(void *data)
  *
  * @dev: device struct of the CCP
  */
-struct ccp_device *ccp_alloc_struct(struct device *dev)
+struct ccp_device *ccp_alloc_struct(struct sp_device *sp)
 {
+	struct device *dev = sp->dev;
 	struct ccp_device *ccp;
 
 	ccp = devm_kzalloc(dev, sizeof(*ccp), GFP_KERNEL);
 	if (!ccp)
 		return NULL;
 	ccp->dev = dev;
+	ccp->sp = sp;
+	ccp->axcache = sp->axcache;
 
 	INIT_LIST_HEAD(&ccp->cmd);
 	INIT_LIST_HEAD(&ccp->backlog);
@@ -487,9 +483,8 @@ struct ccp_device *ccp_alloc_struct(struct device *dev)
 	init_waitqueue_head(&ccp->sb_queue);
 	init_waitqueue_head(&ccp->suspend_queue);
 
-	ccp->ord = ccp_increment_unit_ordinal();
-	snprintf(ccp->name, MAX_CCP_NAME_LEN, "ccp-%u", ccp->ord);
-	snprintf(ccp->rngname, MAX_CCP_NAME_LEN, "ccp-%u-rng", ccp->ord);
+	snprintf(ccp->name, MAX_CCP_NAME_LEN, "ccp-%u", sp->ord);
+	snprintf(ccp->rngname, MAX_CCP_NAME_LEN, "ccp-%u-rng", sp->ord);
 
 	return ccp;
 }
@@ -540,8 +535,9 @@ bool ccp_queues_suspended(struct ccp_device *ccp)
 	return ccp->cmd_q_count == suspended;
 }
 
-int ccp_dev_suspend(struct ccp_device *ccp, pm_message_t state)
+int ccp_dev_suspend(struct sp_device *sp, pm_message_t state)
 {
+	struct ccp_device *ccp = sp->ccp_data;
 	unsigned long flags;
 	unsigned int i;
 
@@ -563,8 +559,9 @@ int ccp_dev_suspend(struct ccp_device *ccp, pm_message_t state)
 	return 0;
 }
 
-int ccp_dev_resume(struct ccp_device *ccp)
+int ccp_dev_resume(struct sp_device *sp)
 {
+	struct ccp_device *ccp = sp->ccp_data;
 	unsigned long flags;
 	unsigned int i;
 
@@ -584,71 +581,54 @@ int ccp_dev_resume(struct ccp_device *ccp)
 }
 #endif
 
-int ccp_dev_init(struct ccp_device *ccp)
+int ccp_dev_init(struct sp_device *sp)
 {
-	ccp->io_regs = ccp->io_map + ccp->vdata->offset;
-
-	if (ccp->vdata->setup)
-		ccp->vdata->setup(ccp);
-
-	return ccp->vdata->perform->init(ccp);
-}
+	struct device *dev = sp->dev;
+	struct ccp_device *ccp;
+	int ret;
 
-void ccp_dev_destroy(struct ccp_device *ccp)
-{
+	ret = -ENOMEM;
+	ccp = ccp_alloc_struct(sp);
 	if (!ccp)
-		return;
+		goto e_err;
+	sp->ccp_data = ccp;
+
+	ccp->vdata = (struct ccp_vdata *)sp->dev_vdata->ccp_vdata;
+	if (!ccp->vdata || !ccp->vdata->version) {
+		ret = -ENODEV;
+		dev_err(dev, "missing driver data\n");
+		goto e_err;
+	}
 
-	ccp->vdata->perform->destroy(ccp);
-}
+	ccp->get_irq = sp->get_irq;
+	ccp->free_irq = sp->free_irq;
 
-static int __init ccp_mod_init(void)
-{
-#ifdef CONFIG_X86
-	int ret;
+	ccp->io_regs = sp->io_map + ccp->vdata->offset;
+	if (ccp->vdata->setup)
+		ccp->vdata->setup(ccp);
 
-	ret = ccp_pci_init();
+	ret = ccp->vdata->perform->init(ccp);
 	if (ret)
-		return ret;
+		goto e_err;
 
-	/* Don't leave the driver loaded if init failed */
-	if (ccp_present() != 0) {
-		ccp_pci_exit();
-		return -ENODEV;
-	}
+	dev_notice(dev, "ccp enabled\n");
 
 	return 0;
-#endif
-
-#ifdef CONFIG_ARM64
-	int ret;
 
-	ret = ccp_platform_init();
-	if (ret)
-		return ret;
+e_err:
+	sp->ccp_data = NULL;
 
-	/* Don't leave the driver loaded if init failed */
-	if (ccp_present() != 0) {
-		ccp_platform_exit();
-		return -ENODEV;
-	}
-
-	return 0;
-#endif
+	dev_notice(dev, "ccp initialization failed\n");
 
-	return -ENODEV;
+	return ret;
 }
 
-static void __exit ccp_mod_exit(void)
+void ccp_dev_destroy(struct sp_device *sp)
 {
-#ifdef CONFIG_X86
-	ccp_pci_exit();
-#endif
+	struct ccp_device *ccp = sp->ccp_data;
 
-#ifdef CONFIG_ARM64
-	ccp_platform_exit();
-#endif
-}
+	if (!ccp)
+		return;
 
-module_init(ccp_mod_init);
-module_exit(ccp_mod_exit);
+	ccp->vdata->perform->destroy(ccp);
+}

drivers/crypto/ccp/ccp-dev.h

@@ -27,6 +27,8 @@
 #include <linux/irqreturn.h>
 #include <linux/dmaengine.h>
 
+#include "sp-dev.h"
+
 #define MAX_CCP_NAME_LEN		16
 #define MAX_DMAPOOL_NAME_LEN		32
 
@@ -344,6 +346,7 @@ struct ccp_device {
 	char rngname[MAX_CCP_NAME_LEN];
 
 	struct device *dev;
+	struct sp_device *sp;
 
 	/* Bus specific device information
 	 */
@@ -362,7 +365,6 @@ struct ccp_device {
 	 *   them.
 	 */
 	struct mutex req_mutex ____cacheline_aligned;
-	void __iomem *io_map;
 	void __iomem *io_regs;
 
 	/* Master lists that all cmds are queued on. Because there can be
@@ -637,7 +639,7 @@ void ccp_del_device(struct ccp_device *ccp);
 
 extern void ccp_log_error(struct ccp_device *, int);
 
-struct ccp_device *ccp_alloc_struct(struct device *dev);
+struct ccp_device *ccp_alloc_struct(struct sp_device *sp);
 bool ccp_queues_suspended(struct ccp_device *ccp);
 int ccp_cmd_queue_thread(void *data);
 int ccp_trng_read(struct hwrng *rng, void *data, size_t max, bool wait);
@@ -652,11 +654,6 @@ void ccp_dmaengine_unregister(struct ccp_device *ccp);
 void ccp5_debugfs_setup(struct ccp_device *ccp);
 void ccp5_debugfs_destroy(void);
 
-int ccp_dev_init(struct ccp_device *ccp);
-void ccp_dev_destroy(struct ccp_device *ccp);
-int ccp_dev_suspend(struct ccp_device *ccp, pm_message_t state);
-int ccp_dev_resume(struct ccp_device *ccp);
-
 /* Structure for computation functions that are device-specific */
 struct ccp_actions {
 	int (*aes)(struct ccp_op *);
@@ -674,16 +671,6 @@ struct ccp_actions {
 	irqreturn_t (*irqhandler)(int, void *);
 };
 
-/* Structure to hold CCP version-specific values */
-struct ccp_vdata {
-	const unsigned int version;
-	const unsigned int dma_chan_attr;
-	void (*setup)(struct ccp_device *);
-	const struct ccp_actions *perform;
-	const unsigned int bar;
-	const unsigned int offset;
-};
-
 extern const struct ccp_vdata ccpv3_platform;
 extern const struct ccp_vdata ccpv3;
 extern const struct ccp_vdata ccpv5a;

drivers/crypto/ccp/ccp-pci.c

@@ -40,7 +40,8 @@ struct ccp_pci {
 
 static int ccp_get_msix_irqs(struct ccp_device *ccp)
 {
-	struct ccp_pci *ccp_pci = ccp->dev_specific;
+	struct sp_device *sp = ccp->sp;
+	struct ccp_pci *ccp_pci = sp->dev_specific;
 	struct device *dev = ccp->dev;
 	struct pci_dev *pdev = to_pci_dev(dev);
 	struct msix_entry msix_entry[MSIX_VECTORS];
@@ -58,11 +59,11 @@ static int ccp_get_msix_irqs(struct ccp_device *ccp)
 	for (v = 0; v < ccp_pci->msix_count; v++) {
 		/* Set the interrupt names and request the irqs */
 		snprintf(ccp_pci->msix[v].name, name_len, "%s-%u",
-			 ccp->name, v);
+			 sp->name, v);
 		ccp_pci->msix[v].vector = msix_entry[v].vector;
 		ret = request_irq(ccp_pci->msix[v].vector,
 				  ccp->vdata->perform->irqhandler,
-				  0, ccp_pci->msix[v].name, dev);
+				  0, ccp_pci->msix[v].name, ccp);
 		if (ret) {
 			dev_notice(dev, "unable to allocate MSI-X IRQ (%d)\n",
 				   ret);
@@ -86,6 +87,7 @@ static int ccp_get_msix_irqs(struct ccp_device *ccp)
 
 static int ccp_get_msi_irq(struct ccp_device *ccp)
 {
+	struct sp_device *sp = ccp->sp;
 	struct device *dev = ccp->dev;
 	struct pci_dev *pdev = to_pci_dev(dev);
 	int ret;
@@ -96,7 +98,7 @@ static int ccp_get_msi_irq(struct ccp_device *ccp)
 
 	ccp->irq = pdev->irq;
 	ret = request_irq(ccp->irq, ccp->vdata->perform->irqhandler, 0,
-			  ccp->name, dev);
+			  sp->name, ccp);
 	if (ret) {
 		dev_notice(dev, "unable to allocate MSI IRQ (%d)\n", ret);
 		goto e_msi;
@@ -134,17 +136,18 @@ static int ccp_get_irqs(struct ccp_device *ccp)
 
 static void ccp_free_irqs(struct ccp_device *ccp)
 {
-	struct ccp_pci *ccp_pci = ccp->dev_specific;
+	struct sp_device *sp = ccp->sp;
+	struct ccp_pci *ccp_pci = sp->dev_specific;
 	struct device *dev = ccp->dev;
 	struct pci_dev *pdev = to_pci_dev(dev);
 
 	if (ccp_pci->msix_count) {
 		while (ccp_pci->msix_count--)
 			free_irq(ccp_pci->msix[ccp_pci->msix_count].vector,
-				 dev);
+				 ccp);
 		pci_disable_msix(pdev);
 	} else if (ccp->irq) {
-		free_irq(ccp->irq, dev);
+		free_irq(ccp->irq, ccp);
 		pci_disable_msi(pdev);
 	}
 	ccp->irq = 0;
@@ -152,7 +155,7 @@ static void ccp_free_irqs(struct ccp_device *ccp)
 
 static int ccp_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 {
-	struct ccp_device *ccp;
+	struct sp_device *sp;
 	struct ccp_pci *ccp_pci;
 	struct device *dev = &pdev->dev;
 	void __iomem * const *iomap_table;
@@ -160,23 +163,23 @@ static int ccp_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	int ret;
 
 	ret = -ENOMEM;
-	ccp = ccp_alloc_struct(dev);
-	if (!ccp)
+	sp = sp_alloc_struct(dev);
+	if (!sp)
 		goto e_err;
 
 	ccp_pci = devm_kzalloc(dev, sizeof(*ccp_pci), GFP_KERNEL);
 	if (!ccp_pci)
 		goto e_err;
 
-	ccp->dev_specific = ccp_pci;
-	ccp->vdata = (struct ccp_vdata *)id->driver_data;
-	if (!ccp->vdata || !ccp->vdata->version) {
+	sp->dev_specific = ccp_pci;
+	sp->dev_vdata = (struct sp_dev_vdata *)id->driver_data;
+	if (!sp->dev_vdata) {
 		ret = -ENODEV;
 		dev_err(dev, "missing driver data\n");
 		goto e_err;
 	}
-	ccp->get_irq = ccp_get_irqs;
-	ccp->free_irq = ccp_free_irqs;
+	sp->get_irq = ccp_get_irqs;
+	sp->free_irq = ccp_free_irqs;
 
 	ret = pcim_enable_device(pdev);
 	if (ret) {
@@ -198,8 +201,8 @@ static int ccp_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		goto e_err;
 	}
 
-	ccp->io_map = iomap_table[ccp->vdata->bar];
-	if (!ccp->io_map) {
+	sp->io_map = iomap_table[sp->dev_vdata->bar];
+	if (!sp->io_map) {
 		dev_err(dev, "ioremap failed\n");
 		ret = -ENOMEM;
 		goto e_err;
@@ -217,9 +220,9 @@ static int ccp_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		}
 	}
 
-	dev_set_drvdata(dev, ccp);
+	dev_set_drvdata(dev, sp);
 
-	ret = ccp_dev_init(ccp);
+	ret = sp_init(sp);
 	if (ret)
 		goto e_err;
 
@@ -235,12 +238,12 @@ static int ccp_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 static void ccp_pci_remove(struct pci_dev *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct ccp_device *ccp = dev_get_drvdata(dev);
+	struct sp_device *sp = dev_get_drvdata(dev);
 
-	if (!ccp)
+	if (!sp)
 		return;
 
-	ccp_dev_destroy(ccp);
+	sp_destroy(sp);
 
 	dev_notice(dev, "disabled\n");
 }
@@ -249,24 +252,44 @@ static void ccp_pci_remove(struct pci_dev *pdev)
 static int ccp_pci_suspend(struct pci_dev *pdev, pm_message_t state)
 {
 	struct device *dev = &pdev->dev;
-	struct ccp_device *ccp = dev_get_drvdata(dev);
+	struct sp_device *sp = dev_get_drvdata(dev);
 
-	return ccp_dev_suspend(ccp, state);
+	return sp_suspend(sp, state);
 }
 
 static int ccp_pci_resume(struct pci_dev *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct ccp_device *ccp = dev_get_drvdata(dev);
+	struct sp_device *sp = dev_get_drvdata(dev);
 
-	return ccp_dev_resume(ccp);
+	return sp_resume(sp);
 }
 #endif
 
+static const struct sp_dev_vdata dev_vdata[] = {
+	{
+		.bar = 2,
+#ifdef CONFIG_CRYPTO_DEV_SP_CCP
+		.ccp_vdata = &ccpv3,
+#endif
+	},
+	{
+		.bar = 2,
+#ifdef CONFIG_CRYPTO_DEV_SP_CCP
+		.ccp_vdata = &ccpv5a,
+#endif
+	},
+	{
+		.bar = 2,
+#ifdef CONFIG_CRYPTO_DEV_SP_CCP
+		.ccp_vdata = &ccpv5b,
+#endif
+	},
+};
 static const struct pci_device_id ccp_pci_table[] = {
-	{ PCI_VDEVICE(AMD, 0x1537), (kernel_ulong_t)&ccpv3 },
-	{ PCI_VDEVICE(AMD, 0x1456), (kernel_ulong_t)&ccpv5a },
-	{ PCI_VDEVICE(AMD, 0x1468), (kernel_ulong_t)&ccpv5b },
+	{ PCI_VDEVICE(AMD, 0x1537), (kernel_ulong_t)&dev_vdata[0] },
+	{ PCI_VDEVICE(AMD, 0x1456), (kernel_ulong_t)&dev_vdata[1] },
+	{ PCI_VDEVICE(AMD, 0x1468), (kernel_ulong_t)&dev_vdata[2] },
 	/* Last entry must be zero */
 	{ 0, }
 };

drivers/crypto/ccp/ccp-platform.c

@@ -35,26 +35,26 @@ struct ccp_platform {
 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)
+static struct sp_dev_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;
+		return (struct sp_dev_vdata *)match->data;
 #endif
 	return NULL;
 }
 
-static struct ccp_vdata *ccp_get_acpi_version(struct platform_device *pdev)
+static struct sp_dev_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;
+		return (struct sp_dev_vdata *)match->driver_data;
 #endif
 	return NULL;
 }
@@ -73,7 +73,7 @@ static int ccp_get_irq(struct ccp_device *ccp)
 
 	ccp->irq = ret;
 	ret = request_irq(ccp->irq, ccp->vdata->perform->irqhandler, 0,
-			  ccp->name, dev);
+			  ccp->name, ccp);
 	if (ret) {
 		dev_notice(dev, "unable to allocate IRQ (%d)\n", ret);
 		return ret;
@@ -99,14 +99,12 @@ static int ccp_get_irqs(struct ccp_device *ccp)
 
 static void ccp_free_irqs(struct ccp_device *ccp)
 {
-	struct device *dev = ccp->dev;
-
-	free_irq(ccp->irq, dev);
+	free_irq(ccp->irq, ccp);
 }
 
 static int ccp_platform_probe(struct platform_device *pdev)
 {
-	struct ccp_device *ccp;
+	struct sp_device *sp;
 	struct ccp_platform *ccp_platform;
 	struct device *dev = &pdev->dev;
 	enum dev_dma_attr attr;
@@ -114,32 +112,31 @@ static int ccp_platform_probe(struct platform_device *pdev)
 	int ret;
 
 	ret = -ENOMEM;
-	ccp = ccp_alloc_struct(dev);
-	if (!ccp)
+	sp = sp_alloc_struct(dev);
+	if (!sp)
 		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)
+	sp->dev_specific = ccp_platform;
+	sp->dev_vdata = pdev->dev.of_node ? ccp_get_of_version(pdev)
 					 : ccp_get_acpi_version(pdev);
-	if (!ccp->vdata || !ccp->vdata->version) {
+	if (!sp->dev_vdata) {
 		ret = -ENODEV;
 		dev_err(dev, "missing driver data\n");
 		goto e_err;
 	}
-	ccp->get_irq = ccp_get_irqs;
-	ccp->free_irq = ccp_free_irqs;
+	sp->get_irq = ccp_get_irqs;
+	sp->free_irq = ccp_free_irqs;
 
 	ior = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	ccp->io_map = devm_ioremap_resource(dev, ior);
-	if (IS_ERR(ccp->io_map)) {
-		ret = PTR_ERR(ccp->io_map);
+	sp->io_map = devm_ioremap_resource(dev, ior);
+	if (IS_ERR(sp->io_map)) {
+		ret = PTR_ERR(sp->io_map);
 		goto e_err;
 	}
-	ccp->io_regs = ccp->io_map;
 
 	attr = device_get_dma_attr(dev);
 	if (attr == DEV_DMA_NOT_SUPPORTED) {
@@ -149,9 +146,9 @@ static int ccp_platform_probe(struct platform_device *pdev)
 
 	ccp_platform->coherent = (attr == DEV_DMA_COHERENT);
 	if (ccp_platform->coherent)
-		ccp->axcache = CACHE_WB_NO_ALLOC;
+		sp->axcache = CACHE_WB_NO_ALLOC;
 	else
-		ccp->axcache = CACHE_NONE;
+		sp->axcache = CACHE_NONE;
 
 	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48));
 	if (ret) {
@@ -159,9 +156,9 @@ static int ccp_platform_probe(struct platform_device *pdev)
 		goto e_err;
 	}
 
-	dev_set_drvdata(dev, ccp);
+	dev_set_drvdata(dev, sp);
 
-	ret = ccp_dev_init(ccp);
+	ret = sp_init(sp);
 	if (ret)
 		goto e_err;
 
@@ -177,9 +174,9 @@ static int ccp_platform_probe(struct platform_device *pdev)
 static int ccp_platform_remove(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct ccp_device *ccp = dev_get_drvdata(dev);
+	struct sp_device *sp = dev_get_drvdata(dev);
 
-	ccp_dev_destroy(ccp);
+	sp_destroy(sp);
 
 	dev_notice(dev, "disabled\n");
 
@@ -191,23 +188,32 @@ 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);
+	struct sp_device *sp = dev_get_drvdata(dev);
 
-	return ccp_dev_suspend(ccp, state);
+	return sp_suspend(sp, state);
 }
 
 static int ccp_platform_resume(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct ccp_device *ccp = dev_get_drvdata(dev);
+	struct sp_device *sp = dev_get_drvdata(dev);
 
-	return ccp_dev_resume(ccp);
+	return sp_resume(sp);
 }
 #endif
 
+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 ccp_acpi_match[] = {
-	{ "AMDI0C00", (kernel_ulong_t)&ccpv3 },
+	{ "AMDI0C00", (kernel_ulong_t)&dev_vdata[0] },
 	{ },
 };
 MODULE_DEVICE_TABLE(acpi, ccp_acpi_match);
@@ -216,7 +222,7 @@ MODULE_DEVICE_TABLE(acpi, ccp_acpi_match);
 #ifdef CONFIG_OF
 static const struct of_device_id ccp_of_match[] = {
 	{ .compatible = "amd,ccp-seattle-v1a",
-	  .data = (const void *)&ccpv3_platform },
+	  .data = (const void *)&dev_vdata[0] },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, ccp_of_match);

drivers/crypto/ccp/sp-dev.c

+/*
+ * AMD Secure Processor driver
+ *
+ * Copyright (C) 2017 Advanced Micro Devices, Inc.
+ *
+ * Author: Tom Lendacky <thomas.lendacky@amd.com>
+ * Author: Gary R Hook <gary.hook@amd.com>
+ * Author: Brijesh Singh <brijesh.singh@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/kthread.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/spinlock_types.h>
+#include <linux/types.h>
+#include <linux/ccp.h>
+
+#include "ccp-dev.h"
+#include "sp-dev.h"
+
+MODULE_AUTHOR("Tom Lendacky <thomas.lendacky@amd.com>");
+MODULE_AUTHOR("Gary R Hook <gary.hook@amd.com>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("1.1.0");
+MODULE_DESCRIPTION("AMD Secure Processor driver");
+
+/* List of SPs, SP count, read-write access lock, and access functions
+ *
+ * Lock structure: get sp_unit_lock for reading whenever we need to
+ * examine the SP list.
+ */
+static DEFINE_RWLOCK(sp_unit_lock);
+static LIST_HEAD(sp_units);
+
+/* Ever-increasing value to produce unique unit numbers */
+static atomic_t sp_ordinal;
+
+static void sp_add_device(struct sp_device *sp)
+{
+	unsigned long flags;
+
+	write_lock_irqsave(&sp_unit_lock, flags);
+
+	list_add_tail(&sp->entry, &sp_units);
+
+	write_unlock_irqrestore(&sp_unit_lock, flags);
+}
+
+static void sp_del_device(struct sp_device *sp)
+{
+	unsigned long flags;
+
+	write_lock_irqsave(&sp_unit_lock, flags);
+
+	list_del(&sp->entry);
+
+	write_unlock_irqrestore(&sp_unit_lock, flags);
+}
+
+/**
+ * sp_alloc_struct - allocate and initialize the sp_device struct
+ *
+ * @dev: device struct of the SP
+ */
+struct sp_device *sp_alloc_struct(struct device *dev)
+{
+	struct sp_device *sp;
+
+	sp = devm_kzalloc(dev, sizeof(*sp), GFP_KERNEL);
+	if (!sp)
+		return NULL;
+
+	sp->dev = dev;
+	sp->ord = atomic_inc_return(&sp_ordinal);
+	snprintf(sp->name, SP_MAX_NAME_LEN, "sp-%u", sp->ord);
+
+	return sp;
+}
+
+int sp_init(struct sp_device *sp)
+{
+	sp_add_device(sp);
+
+	if (sp->dev_vdata->ccp_vdata)
+		ccp_dev_init(sp);
+
+	return 0;
+}
+
+void sp_destroy(struct sp_device *sp)
+{
+	if (sp->dev_vdata->ccp_vdata)
+		ccp_dev_destroy(sp);
+
+	sp_del_device(sp);
+}
+
+#ifdef CONFIG_PM
+int sp_suspend(struct sp_device *sp, pm_message_t state)
+{
+	int ret;
+
+	if (sp->dev_vdata->ccp_vdata) {
+		ret = ccp_dev_suspend(sp, state);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+int sp_resume(struct sp_device *sp)
+{
+	int ret;
+
+	if (sp->dev_vdata->ccp_vdata) {
+		ret = ccp_dev_resume(sp);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+#endif
+
+static int __init sp_mod_init(void)
+{
+#ifdef CONFIG_X86
+	int ret;
+
+	ret = ccp_pci_init();
+	if (ret)
+		return ret;
+
+	/* Don't leave the driver loaded if init failed */
+	if (ccp_present() != 0) {
+		ccp_pci_exit();
+		return -ENODEV;
+	}
+
+	return 0;
+#endif
+
+#ifdef CONFIG_ARM64
+	int ret;
+
+	ret = ccp_platform_init();
+	if (ret)
+		return ret;
+
+	/* Don't leave the driver loaded if init failed */
+	if (ccp_present() != 0) {
+		ccp_platform_exit();
+		return -ENODEV;
+	}
+
+	return 0;
+#endif
+
+	return -ENODEV;
+}
+
+static void __exit sp_mod_exit(void)
+{
+#ifdef CONFIG_X86
+	ccp_pci_exit();
+#endif
+
+#ifdef CONFIG_ARM64
+	ccp_platform_exit();
+#endif
+}
+
+module_init(sp_mod_init);
+module_exit(sp_mod_exit);

drivers/crypto/ccp/sp-dev.h

+/*
+ * AMD Secure Processor driver
+ *
+ * Copyright (C) 2017 Advanced Micro Devices, Inc.
+ *
+ * Author: Tom Lendacky <thomas.lendacky@amd.com>
+ * Author: Gary R Hook <gary.hook@amd.com>
+ * Author: Brijesh Singh <brijesh.singh@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.
+ */
+
+#ifndef __SP_DEV_H__
+#define __SP_DEV_H__
+
+#include <linux/device.h>
+#include <linux/pci.h>
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include <linux/list.h>
+#include <linux/wait.h>
+#include <linux/dmapool.h>
+#include <linux/hw_random.h>
+#include <linux/bitops.h>
+#include <linux/interrupt.h>
+#include <linux/irqreturn.h>
+
+#define SP_MAX_NAME_LEN		32
+
+#define CACHE_NONE			0x00
+#define CACHE_WB_NO_ALLOC		0xb7
+
+/* Structure to hold CCP device data */
+struct ccp_device;
+struct ccp_vdata {
+	const unsigned int version;
+	const unsigned int dma_chan_attr;
+	void (*setup)(struct ccp_device *);
+	const struct ccp_actions *perform;
+	const unsigned int offset;
+};
+/* Structure to hold SP device data */
+struct sp_dev_vdata {
+	const unsigned int bar;
+
+	const struct ccp_vdata *ccp_vdata;
+	void *psp_vdata;
+};
+
+struct sp_device {
+	struct list_head entry;
+
+	struct device *dev;
+
+	struct sp_dev_vdata *dev_vdata;
+	unsigned int ord;
+	char name[SP_MAX_NAME_LEN];
+
+	/* Bus specific device information */
+	void *dev_specific;
+
+	/* I/O area used for device communication. */
+	void __iomem *io_map;
+
+	/* DMA caching attribute support */
+	unsigned int axcache;
+
+	bool irq_registered;
+
+	int (*get_irq)(struct ccp_device *ccp);
+	void (*free_irq)(struct ccp_device *ccp);
+
+	void *ccp_data;
+	void *psp_data;
+};
+
+int sp_pci_init(void);
+void sp_pci_exit(void);
+
+int sp_platform_init(void);
+void sp_platform_exit(void);
+
+struct sp_device *sp_alloc_struct(struct device *dev);
+
+int sp_init(struct sp_device *sp);
+void sp_destroy(struct sp_device *sp);
+struct sp_device *sp_get_master(void);
+
+int sp_suspend(struct sp_device *sp, pm_message_t state);
+int sp_resume(struct sp_device *sp);
+
+#ifdef CONFIG_CRYPTO_DEV_SP_CCP
+
+int ccp_dev_init(struct sp_device *sp);
+void ccp_dev_destroy(struct sp_device *sp);
+
+int ccp_dev_suspend(struct sp_device *sp, pm_message_t state);
+int ccp_dev_resume(struct sp_device *sp);
+
+#else	/* !CONFIG_CRYPTO_DEV_SP_CCP */
+
+static inline int ccp_dev_init(struct sp_device *sp)
+{
+	return 0;
+}
+static inline void ccp_dev_destroy(struct sp_device *sp) { }
+
+static inline int ccp_dev_suspend(struct sp_device *sp, pm_message_t state)
+{
+	return 0;
+}
+static inline int ccp_dev_resume(struct sp_device *sp)
+{
+	return 0;
+}
+#endif	/* CONFIG_CRYPTO_DEV_SP_CCP */
+
+#endif

include/linux/ccp.h

@@ -23,8 +23,7 @@
 struct ccp_device;
 struct ccp_cmd;
 
-#if defined(CONFIG_CRYPTO_DEV_CCP_DD) || \
-	defined(CONFIG_CRYPTO_DEV_CCP_DD_MODULE)
+#if defined(CONFIG_CRYPTO_DEV_SP_CCP)
 
 /**
  * ccp_present - check if a CCP device is present
@@ -70,7 +69,7 @@ unsigned int ccp_version(void);
  */
 int ccp_enqueue_cmd(struct ccp_cmd *cmd);
 
-#else /* CONFIG_CRYPTO_DEV_CCP_DD is not enabled */
+#else /* CONFIG_CRYPTO_DEV_CCP_SP_DEV is not enabled */
 
 static inline int ccp_present(void)
 {
@@ -87,7 +86,7 @@ static inline int ccp_enqueue_cmd(struct ccp_cmd *cmd)
 	return -ENODEV;
 }
 
-#endif /* CONFIG_CRYPTO_DEV_CCP_DD */
+#endif /* CONFIG_CRYPTO_DEV_SP_CCP */
 
 
 /***** AES engine *****/