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Date: Thu, 19 Jan 2017 13:08:11 -0500
From: Brijesh Singh <brijesh.singh@....com>
To: <thomas.lendacky@....com>, <herbert@...dor.apana.org.au>,
<arnd@...db.de>, <gregkh@...uxfoundation.org>,
<lambert.quentin@...il.com>, <gary.hook@....com>,
<linux-kernel@...r.kernel.org>, <Julia.Lawall@...6.fr>,
<weiyongjun1@...wei.com>, <linux-crypto@...r.kernel.org>,
<umgwanakikbuti@...il.com>
CC: <brijesh.singh@....com>
Subject: [PATCH 2/2] misc: amd-sp: 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@....com>
Signed-off-by: Tom Lendacky <thomas.lendacky@....com>
---
drivers/crypto/ccp/Kconfig | 1
drivers/misc/amd-sp/Kconfig | 16 +-
drivers/misc/amd-sp/Makefile | 11 +
drivers/misc/amd-sp/ccp-dev-v3.c | 86 +++++-----
drivers/misc/amd-sp/ccp-dev-v5.c | 72 ++++----
drivers/misc/amd-sp/ccp-dev.c | 137 +++++++++-------
drivers/misc/amd-sp/ccp-dev.h | 35 ----
drivers/misc/amd-sp/sp-dev.c | 309 +++++++++++++++++++++++++++++++++++
drivers/misc/amd-sp/sp-dev.h | 141 ++++++++++++++++
drivers/misc/amd-sp/sp-pci.c | 325 +++++++++++++++++++++++++++++++++++++
drivers/misc/amd-sp/sp-platform.c | 269 +++++++++++++++++++++++++++++++
11 files changed, 1225 insertions(+), 177 deletions(-)
create mode 100644 drivers/misc/amd-sp/sp-dev.c
create mode 100644 drivers/misc/amd-sp/sp-dev.h
create mode 100644 drivers/misc/amd-sp/sp-pci.c
create mode 100644 drivers/misc/amd-sp/sp-platform.c
diff --git a/drivers/crypto/ccp/Kconfig b/drivers/crypto/ccp/Kconfig
index 523d0f5..ac9c503 100644
--- a/drivers/crypto/ccp/Kconfig
+++ b/drivers/crypto/ccp/Kconfig
@@ -1,6 +1,7 @@
config CRYPTO_DEV_CCP_CRYPTO
tristate "Support for AMD Cryptographic Coprocessor"
default n
+ select AMD_SP
select AMD_CCP
select CRYPTO_HASH
select CRYPTO_BLKCIPHER
diff --git a/drivers/misc/amd-sp/Kconfig b/drivers/misc/amd-sp/Kconfig
index dbf7baa..a35b7f6 100644
--- a/drivers/misc/amd-sp/Kconfig
+++ b/drivers/misc/amd-sp/Kconfig
@@ -1,7 +1,16 @@
-config AMD_CCP
- tristate "Support for AMD Cryptographic Coprocessor"
+config AMD_SP
+ tristate "Support for AMD Secure Processor"
default n
depends on ((X86 && PCI) || (ARM64 && (OF_ADDRESS || ACPI))) && HAS_IOMEM
+ help
+ Provides the interface to access the AMD Secure Processor. The
+ AMD Secure Processor supports the AMD Cryptographic Coprocessor.
+ If you choose 'M' here, this module will be call ccp.
+
+config AMD_CCP
+ bool "Support for AMD Cryptographic Coprocessor"
+ depends on AMD_SP
+ default y
select HW_RANDOM
select DMA_ENGINE
select DMADEVICES
@@ -10,5 +19,4 @@ config AMD_CCP
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.
+ AES and more.
diff --git a/drivers/misc/amd-sp/Makefile b/drivers/misc/amd-sp/Makefile
index 85991a5..23f0c9f 100644
--- a/drivers/misc/amd-sp/Makefile
+++ b/drivers/misc/amd-sp/Makefile
@@ -1,8 +1,9 @@
-obj-$(CONFIG_AMD_CCP) += ccp.o
-ccp-objs := ccp-dev.o \
- ccp-ops.o \
+obj-$(CONFIG_AMD_SP) += ccp.o
+ccp-objs := sp-dev.o sp-platform.o
+ccp-$(CONFIG_PCI) += sp-pci.o
+
+ccp-$(CONFIG_AMD_CCP) += ccp-dev.o \
ccp-dev-v3.o \
ccp-dev-v5.o \
- ccp-platform.o \
+ ccp-ops.o \
ccp-dmaengine.o
-ccp-$(CONFIG_PCI) += ccp-pci.o
diff --git a/drivers/misc/amd-sp/ccp-dev-v3.c b/drivers/misc/amd-sp/ccp-dev-v3.c
index 7bc0998..5c50d14 100644
--- a/drivers/misc/amd-sp/ccp-dev-v3.c
+++ b/drivers/misc/amd-sp/ccp-dev-v3.c
@@ -315,6 +315,39 @@ static int ccp_perform_ecc(struct ccp_op *op)
return ccp_do_cmd(op, cr, ARRAY_SIZE(cr));
}
+static irqreturn_t ccp_irq_handler(int irq, void *data)
+{
+ struct ccp_device *ccp = data;
+ struct ccp_cmd_queue *cmd_q;
+ u32 q_int, status;
+ unsigned int i;
+
+ status = ioread32(ccp->io_regs + IRQ_STATUS_REG);
+
+ for (i = 0; i < ccp->cmd_q_count; i++) {
+ cmd_q = &ccp->cmd_q[i];
+
+ q_int = status & (cmd_q->int_ok | cmd_q->int_err);
+ if (q_int) {
+ cmd_q->int_status = status;
+ cmd_q->q_status = ioread32(cmd_q->reg_status);
+ cmd_q->q_int_status = ioread32(cmd_q->reg_int_status);
+
+ /* On error, only save the first error value */
+ if ((q_int & cmd_q->int_err) && !cmd_q->cmd_error)
+ cmd_q->cmd_error = CMD_Q_ERROR(cmd_q->q_status);
+
+ cmd_q->int_rcvd = 1;
+
+ /* Acknowledge the interrupt and wake the kthread */
+ iowrite32(q_int, ccp->io_regs + IRQ_STATUS_REG);
+ wake_up_interruptible(&cmd_q->int_queue);
+ }
+ }
+
+ return IRQ_HANDLED;
+}
+
static int ccp_init(struct ccp_device *ccp)
{
struct device *dev = ccp->dev;
@@ -374,7 +407,7 @@ static int ccp_init(struct ccp_device *ccp)
#ifdef CONFIG_ARM64
/* For arm64 set the recommended queue cache settings */
- iowrite32(ccp->axcache, ccp->io_regs + CMD_Q_CACHE_BASE +
+ iowrite32(ccp->sp->axcache, ccp->io_regs + CMD_Q_CACHE_BASE +
(CMD_Q_CACHE_INC * i));
#endif
@@ -398,7 +431,7 @@ static int ccp_init(struct ccp_device *ccp)
iowrite32(qim, ccp->io_regs + IRQ_STATUS_REG);
/* Request an irq */
- ret = ccp->get_irq(ccp);
+ ret = sp_request_ccp_irq(ccp->sp, ccp_irq_handler, ccp->name, ccp);
if (ret) {
dev_err(dev, "unable to allocate an IRQ\n");
goto e_pool;
@@ -450,7 +483,7 @@ static int ccp_init(struct ccp_device *ccp)
if (ccp->cmd_q[i].kthread)
kthread_stop(ccp->cmd_q[i].kthread);
- ccp->free_irq(ccp);
+ sp_free_ccp_irq(ccp->sp, ccp);
e_pool:
for (i = 0; i < ccp->cmd_q_count; i++)
@@ -496,7 +529,7 @@ static void ccp_destroy(struct ccp_device *ccp)
if (ccp->cmd_q[i].kthread)
kthread_stop(ccp->cmd_q[i].kthread);
- ccp->free_irq(ccp);
+ sp_free_ccp_irq(ccp->sp, ccp);
for (i = 0; i < ccp->cmd_q_count; i++)
dma_pool_destroy(ccp->cmd_q[i].dma_pool);
@@ -516,40 +549,6 @@ static void ccp_destroy(struct ccp_device *ccp)
}
}
-static irqreturn_t ccp_irq_handler(int irq, void *data)
-{
- struct device *dev = data;
- struct ccp_device *ccp = dev_get_drvdata(dev);
- struct ccp_cmd_queue *cmd_q;
- u32 q_int, status;
- unsigned int i;
-
- status = ioread32(ccp->io_regs + IRQ_STATUS_REG);
-
- for (i = 0; i < ccp->cmd_q_count; i++) {
- cmd_q = &ccp->cmd_q[i];
-
- q_int = status & (cmd_q->int_ok | cmd_q->int_err);
- if (q_int) {
- cmd_q->int_status = status;
- cmd_q->q_status = ioread32(cmd_q->reg_status);
- cmd_q->q_int_status = ioread32(cmd_q->reg_int_status);
-
- /* On error, only save the first error value */
- if ((q_int & cmd_q->int_err) && !cmd_q->cmd_error)
- cmd_q->cmd_error = CMD_Q_ERROR(cmd_q->q_status);
-
- cmd_q->int_rcvd = 1;
-
- /* Acknowledge the interrupt and wake the kthread */
- iowrite32(q_int, ccp->io_regs + IRQ_STATUS_REG);
- wake_up_interruptible(&cmd_q->int_queue);
- }
- }
-
- return IRQ_HANDLED;
-}
-
static const struct ccp_actions ccp3_actions = {
.aes = ccp_perform_aes,
.xts_aes = ccp_perform_xts_aes,
@@ -562,13 +561,18 @@ static const struct ccp_actions ccp3_actions = {
.init = ccp_init,
.destroy = ccp_destroy,
.get_free_slots = ccp_get_free_slots,
- .irqhandler = ccp_irq_handler,
};
-const struct ccp_vdata ccpv3 = {
+const struct ccp_vdata ccpv3_platform = {
+ .version = CCP_VERSION(3, 0),
+ .setup = NULL,
+ .perform = &ccp3_actions,
+ .offset = 0,
+};
+
+const struct ccp_vdata ccpv3_pci = {
.version = CCP_VERSION(3, 0),
.setup = NULL,
.perform = &ccp3_actions,
- .bar = 2,
.offset = 0x20000,
};
diff --git a/drivers/misc/amd-sp/ccp-dev-v5.c b/drivers/misc/amd-sp/ccp-dev-v5.c
index e2ce819..282f1b3 100644
--- a/drivers/misc/amd-sp/ccp-dev-v5.c
+++ b/drivers/misc/amd-sp/ccp-dev-v5.c
@@ -651,6 +651,37 @@ static int ccp_assign_lsbs(struct ccp_device *ccp)
return rc;
}
+static irqreturn_t ccp5_irq_handler(int irq, void *data)
+{
+ u32 status;
+ unsigned int i;
+ struct ccp_device *ccp = (struct ccp_device *)data;
+
+ for (i = 0; i < ccp->cmd_q_count; i++) {
+ struct ccp_cmd_queue *cmd_q = &ccp->cmd_q[i];
+
+ status = ioread32(cmd_q->reg_interrupt_status);
+
+ if (status) {
+ cmd_q->int_status = status;
+ cmd_q->q_status = ioread32(cmd_q->reg_status);
+ cmd_q->q_int_status = ioread32(cmd_q->reg_int_status);
+
+ /* On error, only save the first error value */
+ if ((status & INT_ERROR) && !cmd_q->cmd_error)
+ cmd_q->cmd_error = CMD_Q_ERROR(cmd_q->q_status);
+
+ cmd_q->int_rcvd = 1;
+
+ /* Acknowledge the interrupt and wake the kthread */
+ iowrite32(ALL_INTERRUPTS, cmd_q->reg_interrupt_status);
+ wake_up_interruptible(&cmd_q->int_queue);
+ }
+ }
+
+ return IRQ_HANDLED;
+}
+
static int ccp5_init(struct ccp_device *ccp)
{
struct device *dev = ccp->dev;
@@ -752,7 +783,7 @@ static int ccp5_init(struct ccp_device *ccp)
dev_dbg(dev, "Requesting an IRQ...\n");
/* Request an irq */
- ret = ccp->get_irq(ccp);
+ ret = sp_request_ccp_irq(ccp->sp, ccp5_irq_handler, ccp->name, ccp);
if (ret) {
dev_err(dev, "unable to allocate an IRQ\n");
goto e_pool;
@@ -855,7 +886,7 @@ static int ccp5_init(struct ccp_device *ccp)
kthread_stop(ccp->cmd_q[i].kthread);
e_irq:
- ccp->free_irq(ccp);
+ sp_free_ccp_irq(ccp->sp, ccp);
e_pool:
for (i = 0; i < ccp->cmd_q_count; i++)
@@ -901,7 +932,7 @@ static void ccp5_destroy(struct ccp_device *ccp)
if (ccp->cmd_q[i].kthread)
kthread_stop(ccp->cmd_q[i].kthread);
- ccp->free_irq(ccp);
+ sp_free_ccp_irq(ccp->sp, ccp);
for (i = 0; i < ccp->cmd_q_count; i++) {
cmd_q = &ccp->cmd_q[i];
@@ -924,38 +955,6 @@ static void ccp5_destroy(struct ccp_device *ccp)
}
}
-static irqreturn_t ccp5_irq_handler(int irq, void *data)
-{
- struct device *dev = data;
- struct ccp_device *ccp = dev_get_drvdata(dev);
- u32 status;
- unsigned int i;
-
- for (i = 0; i < ccp->cmd_q_count; i++) {
- struct ccp_cmd_queue *cmd_q = &ccp->cmd_q[i];
-
- status = ioread32(cmd_q->reg_interrupt_status);
-
- if (status) {
- cmd_q->int_status = status;
- cmd_q->q_status = ioread32(cmd_q->reg_status);
- cmd_q->q_int_status = ioread32(cmd_q->reg_int_status);
-
- /* On error, only save the first error value */
- if ((status & INT_ERROR) && !cmd_q->cmd_error)
- cmd_q->cmd_error = CMD_Q_ERROR(cmd_q->q_status);
-
- cmd_q->int_rcvd = 1;
-
- /* Acknowledge the interrupt and wake the kthread */
- iowrite32(ALL_INTERRUPTS, cmd_q->reg_interrupt_status);
- wake_up_interruptible(&cmd_q->int_queue);
- }
- }
-
- return IRQ_HANDLED;
-}
-
static void ccp5_config(struct ccp_device *ccp)
{
/* Public side */
@@ -1001,14 +1000,12 @@ static const struct ccp_actions ccp5_actions = {
.init = ccp5_init,
.destroy = ccp5_destroy,
.get_free_slots = ccp5_get_free_slots,
- .irqhandler = ccp5_irq_handler,
};
const struct ccp_vdata ccpv5a = {
.version = CCP_VERSION(5, 0),
.setup = ccp5_config,
.perform = &ccp5_actions,
- .bar = 2,
.offset = 0x0,
};
@@ -1016,6 +1013,5 @@ const struct ccp_vdata ccpv5b = {
.version = CCP_VERSION(5, 0),
.setup = ccp5other_config,
.perform = &ccp5_actions,
- .bar = 2,
.offset = 0x0,
};
diff --git a/drivers/misc/amd-sp/ccp-dev.c b/drivers/misc/amd-sp/ccp-dev.c
index 511ab04..0fa8c4a 100644
--- a/drivers/misc/amd-sp/ccp-dev.c
+++ b/drivers/misc/amd-sp/ccp-dev.c
@@ -22,19 +22,11 @@
#include <linux/mutex.h>
#include <linux/delay.h>
#include <linux/hw_random.h>
-#include <linux/cpu.h>
-#ifdef CONFIG_X86
-#include <asm/cpu_device_id.h>
-#endif
#include <linux/ccp.h>
+#include "sp-dev.h"
#include "ccp-dev.h"
-MODULE_AUTHOR("Tom Lendacky <thomas.lendacky@....com>");
-MODULE_LICENSE("GPL");
-MODULE_VERSION("1.0.0");
-MODULE_DESCRIPTION("AMD Cryptographic Coprocessor driver");
-
struct ccp_tasklet_data {
struct completion completion;
struct ccp_cmd *cmd;
@@ -110,13 +102,6 @@ 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
*
@@ -455,19 +440,17 @@ int ccp_cmd_queue_thread(void *data)
return 0;
}
-/**
- * ccp_alloc_struct - allocate and initialize the ccp_device struct
- *
- * @dev: device struct of the CCP
- */
-struct ccp_device *ccp_alloc_struct(struct device *dev)
+static 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;
INIT_LIST_HEAD(&ccp->cmd);
INIT_LIST_HEAD(&ccp->backlog);
@@ -482,9 +465,8 @@ 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;
}
@@ -536,53 +518,94 @@ bool ccp_queues_suspended(struct ccp_device *ccp)
}
#endif
-static int __init ccp_mod_init(void)
+int ccp_dev_init(struct sp_device *sp)
{
-#ifdef CONFIG_X86
+ struct device *dev = sp->dev;
+ struct ccp_device *ccp;
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;
+ ret = -ENOMEM;
+ ccp = ccp_alloc_struct(sp);
+ if (!ccp)
+ goto e_err;
+ sp->ccp_data = ccp;
+
+ ccp->vdata = (struct ccp_vdata *)sp->dev_data->ccp_vdata;
+ if (!ccp->vdata || !ccp->vdata->version) {
+ ret = -ENODEV;
+ dev_err(dev, "missing driver data\n");
+ goto e_err;
}
- return 0;
-#endif
+ ccp->io_regs = sp->io_map + ccp->vdata->offset;
-#ifdef CONFIG_ARM64
- int ret;
+ if (ccp->vdata->setup)
+ ccp->vdata->setup(ccp);
- ret = ccp_platform_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_platform_exit();
- return -ENODEV;
- }
+ dev_notice(dev, "ccp enabled\n");
return 0;
-#endif
- return -ENODEV;
+e_err:
+ sp->ccp_data = NULL;
+
+ dev_notice(dev, "ccp initialization failed\n");
+
+ 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
+ ccp->vdata->perform->destroy(ccp);
+}
+
+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;
+
+ 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;
}
-module_init(ccp_mod_init);
-module_exit(ccp_mod_exit);
+int ccp_dev_resume(struct sp_device *sp)
+{
+ struct ccp_device *ccp = sp->ccp_data;
+ 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;
+}
diff --git a/drivers/misc/amd-sp/ccp-dev.h b/drivers/misc/amd-sp/ccp-dev.h
index 830f35e..cd207b0 100644
--- a/drivers/misc/amd-sp/ccp-dev.h
+++ b/drivers/misc/amd-sp/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
@@ -35,9 +37,6 @@
#define TRNG_RETRIES 10
-#define CACHE_NONE 0x00
-#define CACHE_WB_NO_ALLOC 0xb7
-
/****** Register Mappings ******/
#define Q_MASK_REG 0x000
#define TRNG_OUT_REG 0x00c
@@ -321,18 +320,15 @@ struct ccp_device {
struct list_head entry;
struct ccp_vdata *vdata;
- unsigned int ord;
char name[MAX_CCP_NAME_LEN];
char rngname[MAX_CCP_NAME_LEN];
struct device *dev;
+ struct sp_device *sp;
/* Bus specific device information
*/
void *dev_specific;
- int (*get_irq)(struct ccp_device *ccp);
- void (*free_irq)(struct ccp_device *ccp);
- unsigned int irq;
/* I/O area used for device communication. The register mapping
* starts at an offset into the mapped bar.
@@ -341,7 +337,6 @@ 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
@@ -406,9 +401,6 @@ struct ccp_device {
/* Suspend support */
unsigned int suspending;
wait_queue_head_t suspend_queue;
-
- /* DMA caching attribute support */
- unsigned int axcache;
};
enum ccp_memtype {
@@ -591,18 +583,11 @@ struct ccp5_desc {
struct dword7 dw7;
};
-int ccp_pci_init(void);
-void ccp_pci_exit(void);
-
-int ccp_platform_init(void);
-void ccp_platform_exit(void);
-
void ccp_add_device(struct ccp_device *ccp);
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);
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);
@@ -628,20 +613,6 @@ struct ccp_actions {
unsigned int (*get_free_slots)(struct ccp_cmd_queue *);
int (*init)(struct ccp_device *);
void (*destroy)(struct ccp_device *);
- irqreturn_t (*irqhandler)(int, void *);
-};
-
-/* Structure to hold CCP version-specific values */
-struct ccp_vdata {
- const unsigned int version;
- void (*setup)(struct ccp_device *);
- const struct ccp_actions *perform;
- const unsigned int bar;
- const unsigned int offset;
};
-extern const struct ccp_vdata ccpv3;
-extern const struct ccp_vdata ccpv5a;
-extern const struct ccp_vdata ccpv5b;
-
#endif
diff --git a/drivers/misc/amd-sp/sp-dev.c b/drivers/misc/amd-sp/sp-dev.c
new file mode 100644
index 0000000..af4050b
--- /dev/null
+++ b/drivers/misc/amd-sp/sp-dev.c
@@ -0,0 +1,309 @@
+/*
+ * AMD Secure Processor driver
+ *
+ * Copyright (C) 2017 Advanced Micro Devices, Inc.
+ *
+ * Authors:
+ * Brijesh Singh <brijesh.singh@....com>
+ * Tom Lendacky <thomas.lendacky@....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 "sp-dev.h"
+
+MODULE_AUTHOR("Tom Lendacky <thomas.lendacky@....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);
+}
+
+struct sp_device *sp_get_device(void)
+{
+ struct sp_device *sp = NULL;
+ unsigned long flags;
+
+ write_lock_irqsave(&sp_unit_lock, flags);
+
+ if (list_empty(&sp_units))
+ goto unlock;
+
+ sp = list_first_entry(&sp_units, struct sp_device, entry);
+
+ list_add_tail(&sp->entry, &sp_units);
+unlock:
+ write_unlock_irqrestore(&sp_unit_lock, flags);
+ return sp;
+}
+
+static irqreturn_t sp_irq_handler(int irq, void *data)
+{
+ struct sp_device *sp = data;
+
+ if (sp->psp_irq_handler)
+ sp->psp_irq_handler(irq, sp->psp_irq_data);
+
+ if (sp->ccp_irq_handler)
+ sp->ccp_irq_handler(irq, sp->ccp_irq_data);
+
+ return IRQ_HANDLED;
+}
+
+int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler,
+ const char *name, void *data)
+{
+ int ret;
+
+ if ((sp->psp_irq == sp->ccp_irq) && sp->dev_data->ccp_vdata) {
+ /* Need a common routine to manager all interrupts */
+ sp->psp_irq_data = data;
+ sp->psp_irq_handler = handler;
+
+ if (!sp->irq_registered) {
+ ret = request_irq(sp->psp_irq, sp_irq_handler, 0,
+ sp->name, sp);
+ if (ret)
+ return ret;
+
+ sp->irq_registered = true;
+ }
+ } else {
+ /* Each sub-device can manage it's own interrupt */
+ ret = request_irq(sp->psp_irq, handler, 0, name, data);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler,
+ const char *name, void *data)
+{
+ int ret;
+
+ if ((sp->psp_irq == sp->ccp_irq) && sp->dev_data->psp_vdata) {
+ /* Need a common routine to manager all interrupts */
+ sp->ccp_irq_data = data;
+ sp->ccp_irq_handler = handler;
+
+ if (!sp->irq_registered) {
+ ret = request_irq(sp->ccp_irq, sp_irq_handler, 0,
+ sp->name, sp);
+ if (ret)
+ return ret;
+
+ sp->irq_registered = true;
+ }
+ } else {
+ /* Each sub-device can manage it's own interrupt */
+ ret = request_irq(sp->ccp_irq, handler, 0, name, data);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+void sp_free_psp_irq(struct sp_device *sp, void *data)
+{
+ if ((sp->psp_irq == sp->ccp_irq) && sp->dev_data->ccp_vdata) {
+ /* Using a common routine to manager all interrupts */
+ if (!sp->ccp_irq_handler) {
+ /* Nothing else using it, so free it */
+ free_irq(sp->psp_irq, sp);
+
+ sp->irq_registered = false;
+ }
+
+ sp->psp_irq_handler = NULL;
+ sp->psp_irq_data = NULL;
+ } else {
+ /* Each sub-device can manage it's own interrupt */
+ free_irq(sp->psp_irq, data);
+ }
+}
+
+void sp_free_ccp_irq(struct sp_device *sp, void *data)
+{
+ if ((sp->psp_irq == sp->ccp_irq) && sp->dev_data->psp_vdata) {
+ /* Using a common routine to manager all interrupts */
+ if (!sp->psp_irq_handler) {
+ /* Nothing else using it, so free it */
+ free_irq(sp->ccp_irq, sp);
+
+ sp->irq_registered = false;
+ }
+
+ sp->ccp_irq_handler = NULL;
+ sp->ccp_irq_data = NULL;
+ } else {
+ /* Each sub-device can manage it's own interrupt */
+ free_irq(sp->ccp_irq, data);
+ }
+}
+
+/**
+ * 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) - 1;
+ 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_data->ccp_vdata)
+ ccp_dev_init(sp);
+
+ return 0;
+}
+
+void sp_destroy(struct sp_device *sp)
+{
+ if (sp->dev_data->ccp_vdata)
+ ccp_dev_destroy(sp);
+
+ sp_del_device(sp);
+}
+
+int sp_suspend(struct sp_device *sp, pm_message_t state)
+{
+ int ret;
+
+ if (sp->dev_data->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_data->ccp_vdata) {
+ ret = ccp_dev_resume(sp);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+struct sp_device *sp_get_psp_master_device(void)
+{
+ struct sp_device *sp = sp_get_device();
+
+ if (!sp)
+ return NULL;
+
+ if (!sp->psp_data)
+ return NULL;
+
+ return sp->get_master_device();
+}
+
+void sp_set_psp_master(struct sp_device *sp)
+{
+ if (sp->psp_data)
+ sp->set_master_device(sp);
+}
+
+static int __init sp_mod_init(void)
+{
+#ifdef CONFIG_X86
+ int ret;
+
+ ret = sp_pci_init();
+ if (ret)
+ return ret;
+
+ return 0;
+#endif
+
+#ifdef CONFIG_ARM64
+ int ret;
+
+ ret = sp_platform_init();
+ if (ret)
+ return ret;
+
+ return 0;
+#endif
+
+ return -ENODEV;
+}
+
+static void __exit sp_mod_exit(void)
+{
+#ifdef CONFIG_X86
+ sp_pci_exit();
+#endif
+
+#ifdef CONFIG_ARM64
+ sp_platform_exit();
+#endif
+}
+
+module_init(sp_mod_init);
+module_exit(sp_mod_exit);
diff --git a/drivers/misc/amd-sp/sp-dev.h b/drivers/misc/amd-sp/sp-dev.h
new file mode 100644
index 0000000..67832c5
--- /dev/null
+++ b/drivers/misc/amd-sp/sp-dev.h
@@ -0,0 +1,141 @@
+/*
+ * AMD Secure Processor driver
+ *
+ * Copyright (C) 2017 Advanced Micro Devices, Inc.
+ *
+ * Authors:
+ * Brijesh Singh <brijesh.singh@....com>
+ * Tom Lendacky <thomas.lendacky@....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;
+ void (*setup)(struct ccp_device *);
+ const struct ccp_actions *perform;
+ const unsigned int offset;
+};
+
+/* Structure to hold SP device data */
+struct sp_dev_data {
+ const unsigned int bar;
+
+ const struct ccp_vdata *ccp_vdata;
+ const void *psp_vdata;
+};
+
+struct sp_device {
+ struct list_head entry;
+
+ struct device *dev;
+
+ struct sp_dev_data *dev_data;
+ 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;
+
+ /* get and set master device */
+ struct sp_device *(*get_master_device)(void);
+ void (*set_master_device)(struct sp_device *);
+
+ unsigned int psp_irq;
+ irq_handler_t psp_irq_handler;
+ void *psp_irq_data;
+
+ unsigned int ccp_irq;
+ irq_handler_t ccp_irq_handler;
+ void *ccp_irq_data;
+
+ void *psp_data;
+ void *ccp_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);
+
+int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler,
+ const char *name, void *data);
+void sp_free_psp_irq(struct sp_device *sp, void *data);
+
+int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler,
+ const char *name, void *data);
+void sp_free_ccp_irq(struct sp_device *sp, void *data);
+
+void sp_set_psp_master(struct sp_device *sp);
+struct sp_device *sp_get_psp_master_device(void);
+
+#ifdef CONFIG_AMD_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_AMD_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_AMD_CCP */
+
+#endif
diff --git a/drivers/misc/amd-sp/sp-pci.c b/drivers/misc/amd-sp/sp-pci.c
new file mode 100644
index 0000000..75acfa5
--- /dev/null
+++ b/drivers/misc/amd-sp/sp-pci.c
@@ -0,0 +1,325 @@
+/*
+ * AMD Secure Processor driver
+ *
+ * Copyright (C) 2017 Advanced Micro Devices, Inc.
+ *
+ * Authors:
+ * Brijesh Singh <brijesh.singh@....com>
+ * Tom Lendacky <thomas.lendacky@....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/pci.h>
+#include <linux/pci_ids.h>
+#include <linux/dma-mapping.h>
+#include <linux/kthread.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+
+#include "sp-dev.h"
+
+#define MSIX_VECTORS 2
+
+struct sp_pci {
+ int msix_count;
+ struct msix_entry msix_entry[MSIX_VECTORS];
+};
+
+static struct sp_device *sp_dev_master;
+
+static int sp_get_msix_irqs(struct sp_device *sp)
+{
+ struct sp_pci *sp_pci = sp->dev_specific;
+ struct device *dev = sp->dev;
+ struct pci_dev *pdev = to_pci_dev(dev);
+ int v, ret;
+
+ for (v = 0; v < ARRAY_SIZE(sp_pci->msix_entry); v++)
+ sp_pci->msix_entry[v].entry = v;
+
+ ret = pci_enable_msix_range(pdev, sp_pci->msix_entry, 1, v);
+ if (ret < 0)
+ return ret;
+
+ sp_pci->msix_count = ret;
+
+ sp->psp_irq = sp_pci->msix_entry[0].vector;
+ sp->ccp_irq = (sp_pci->msix_count > 1) ? sp_pci->msix_entry[1].vector
+ : sp_pci->msix_entry[0].vector;
+
+ return 0;
+}
+
+static int sp_get_msi_irq(struct sp_device *sp)
+{
+ struct device *dev = sp->dev;
+ struct pci_dev *pdev = to_pci_dev(dev);
+ int ret;
+
+ ret = pci_enable_msi(pdev);
+ if (ret)
+ return ret;
+
+ sp->psp_irq = pdev->irq;
+ sp->ccp_irq = pdev->irq;
+
+ return 0;
+}
+
+static int sp_get_irqs(struct sp_device *sp)
+{
+ struct device *dev = sp->dev;
+ int ret;
+
+ ret = sp_get_msix_irqs(sp);
+ if (!ret)
+ return 0;
+
+ /* Couldn't get MSI-X vectors, try MSI */
+ dev_notice(dev, "could not enable MSI-X (%d), trying MSI\n", ret);
+ ret = sp_get_msi_irq(sp);
+ if (!ret)
+ return 0;
+
+ /* Couldn't get MSI interrupt */
+ dev_notice(dev, "could not enable MSI (%d)\n", ret);
+
+ return ret;
+}
+
+static void sp_free_irqs(struct sp_device *sp)
+{
+ struct sp_pci *sp_pci = sp->dev_specific;
+ struct device *dev = sp->dev;
+ struct pci_dev *pdev = to_pci_dev(dev);
+
+ if (sp_pci->msix_count)
+ pci_disable_msix(pdev);
+ else if (sp->psp_irq)
+ pci_disable_msi(pdev);
+
+ sp->psp_irq = 0;
+ sp->ccp_irq = 0;
+}
+
+static bool sp_pci_is_master(struct sp_device *sp)
+{
+ struct device *dev_cur, *dev_new;
+ struct pci_dev *pdev_cur, *pdev_new;
+
+ dev_new = sp->dev;
+ dev_cur = sp_dev_master->dev;
+
+ pdev_new = to_pci_dev(dev_new);
+ pdev_cur = to_pci_dev(dev_cur);
+
+ if (pdev_new->bus->number < pdev_cur->bus->number)
+ return true;
+
+ if (PCI_SLOT(pdev_new->devfn) < PCI_SLOT(pdev_cur->devfn))
+ return true;
+
+ if (PCI_FUNC(pdev_new->devfn) < PCI_FUNC(pdev_cur->devfn))
+ return true;
+
+ return false;
+}
+
+static void sp_pci_set_master(struct sp_device *sp)
+{
+ if (!sp_dev_master) {
+ sp_dev_master = sp;
+ return;
+ }
+
+ if (sp_pci_is_master(sp))
+ sp_dev_master = sp;
+}
+
+static struct sp_device *sp_pci_get_master(void)
+{
+ return sp_dev_master;
+}
+
+static int sp_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ struct sp_device *sp;
+ struct sp_pci *sp_pci;
+ struct device *dev = &pdev->dev;
+ void __iomem * const *iomap_table;
+ int bar_mask;
+ int ret;
+
+ ret = -ENOMEM;
+ sp = sp_alloc_struct(dev);
+ if (!sp)
+ goto e_err;
+
+ sp_pci = devm_kzalloc(dev, sizeof(*sp_pci), GFP_KERNEL);
+ if (!sp_pci)
+ goto e_err;
+ sp->dev_specific = sp_pci;
+
+ sp->dev_data = (struct sp_dev_data *)id->driver_data;
+ if (!sp->dev_data) {
+ ret = -ENODEV;
+ dev_err(dev, "missing driver data\n");
+ goto e_err;
+ }
+
+ ret = pcim_enable_device(pdev);
+ if (ret) {
+ dev_err(dev, "pcim_enable_device failed (%d)\n", ret);
+ goto e_err;
+ }
+
+ bar_mask = pci_select_bars(pdev, IORESOURCE_MEM);
+ ret = pcim_iomap_regions(pdev, bar_mask, "sp");
+ if (ret) {
+ dev_err(dev, "pcim_iomap_regions failed (%d)\n", ret);
+ goto e_err;
+ }
+
+ iomap_table = pcim_iomap_table(pdev);
+ if (!iomap_table) {
+ dev_err(dev, "pcim_iomap_table failed\n");
+ ret = -ENOMEM;
+ goto e_err;
+ }
+
+ sp->io_map = iomap_table[sp->dev_data->bar];
+ if (!sp->io_map) {
+ dev_err(dev, "ioremap failed\n");
+ ret = -ENOMEM;
+ goto e_err;
+ }
+
+ ret = sp_get_irqs(sp);
+ if (ret)
+ goto e_err;
+
+ pci_set_master(pdev);
+
+ sp->set_master_device = sp_pci_set_master;
+ sp->get_master_device = sp_pci_get_master;
+
+ ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48));
+ if (ret) {
+ ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
+ if (ret) {
+ dev_err(dev, "dma_set_mask_and_coherent failed (%d)\n",
+ 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 void sp_pci_remove(struct pci_dev *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct sp_device *sp = dev_get_drvdata(dev);
+
+ if (!sp)
+ return;
+
+ sp_destroy(sp);
+
+ sp_free_irqs(sp);
+
+ dev_notice(dev, "disabled\n");
+}
+
+#ifdef CONFIG_PM
+static int sp_pci_suspend(struct pci_dev *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_pci_resume(struct pci_dev *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct sp_device *sp = dev_get_drvdata(dev);
+
+ return sp_resume(sp);
+}
+#endif
+
+extern struct ccp_vdata ccpv3_pci;
+extern struct ccp_vdata ccpv5a;
+extern struct ccp_vdata ccpv5b;
+
+static const struct sp_dev_data dev_data[] = {
+ {
+ .bar = 2,
+#ifdef CONFIG_AMD_CCP
+ .ccp_vdata = &ccpv3_pci,
+#endif
+ },
+ {
+ .bar = 2,
+#ifdef CONFIG_AMD_CCP
+ .ccp_vdata = &ccpv5a,
+#endif
+ },
+ {
+ .bar = 2,
+#ifdef CONFIG_AMD_CCP
+ .ccp_vdata = &ccpv5b,
+#endif
+ },
+};
+
+static const struct pci_device_id sp_pci_table[] = {
+ { PCI_VDEVICE(AMD, 0x1537), (kernel_ulong_t)&dev_data[0] },
+ { PCI_VDEVICE(AMD, 0x1456), (kernel_ulong_t)&dev_data[1] },
+ { PCI_VDEVICE(AMD, 0x1468), (kernel_ulong_t)&dev_data[2] },
+ /* Last entry must be zero */
+ { 0, }
+};
+MODULE_DEVICE_TABLE(pci, sp_pci_table);
+
+static struct pci_driver sp_pci_driver = {
+ .name = "sp",
+ .id_table = sp_pci_table,
+ .probe = sp_pci_probe,
+ .remove = sp_pci_remove,
+#ifdef CONFIG_PM
+ .suspend = sp_pci_suspend,
+ .resume = sp_pci_resume,
+#endif
+};
+
+int sp_pci_init(void)
+{
+ return pci_register_driver(&sp_pci_driver);
+}
+
+void sp_pci_exit(void)
+{
+ pci_unregister_driver(&sp_pci_driver);
+}
diff --git a/drivers/misc/amd-sp/sp-platform.c b/drivers/misc/amd-sp/sp-platform.c
new file mode 100644
index 0000000..258c542
--- /dev/null
+++ b/drivers/misc/amd-sp/sp-platform.c
@@ -0,0 +1,269 @@
+/*
+ * AMD Secure Processor driver
+ *
+ * Copyright (C) 2017 Advanced Micro Devices, Inc.
+ *
+ * Authors:
+ * Brijesh Singh <brijesh.singh@....com>
+ * Tom Lendacky <thomas.lendacky@....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/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/acpi.h>
+
+#include "sp-dev.h"
+
+struct sp_platform {
+ int coherent;
+ unsigned int irq_count;
+};
+
+static struct sp_device *sp_dev_master;
+static const struct acpi_device_id sp_acpi_match[];
+static const struct of_device_id sp_of_match[];
+
+static struct sp_dev_data *sp_get_of_dev_data(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_data *)match->data;
+#endif
+
+ return NULL;
+}
+
+static struct sp_dev_data *sp_get_acpi_dev_data(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_data *)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)
+ return ret;
+
+ sp->psp_irq = ret;
+ if (count == 1) {
+ sp->ccp_irq = ret;
+ } else {
+ ret = platform_get_irq(pdev, 1);
+ if (ret < 0)
+ return ret;
+
+ sp->ccp_irq = ret;
+ }
+
+ return 0;
+}
+
+void sp_platform_set_master(struct sp_device *sp)
+{
+ if (!sp_dev_master)
+ sp_dev_master = sp;
+}
+
+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_data = pdev->dev.of_node ? sp_get_of_dev_data(pdev)
+ : sp_get_acpi_dev_data(pdev);
+ if (!sp->dev_data) {
+ 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);
+
+ if (!sp)
+ return 0;
+
+ 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
+
+extern struct ccp_vdata ccpv3_platform;
+
+static const struct sp_dev_data dev_data[] = {
+ {
+#ifdef CONFIG_AMD_CCP
+ .ccp_vdata = &ccpv3_platform,
+#endif
+ },
+};
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id sp_acpi_match[] = {
+ { "AMDI0C00", (kernel_ulong_t)&dev_data[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_data[0] },
+ { },
+};
+MODULE_DEVICE_TABLE(of, sp_of_match);
+#endif
+
+static struct platform_driver sp_platform_driver = {
+ .driver = {
+ .name = "sp",
+#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
+};
+
+struct sp_device *sp_platform_get_master(void)
+{
+ return sp_dev_master;
+}
+
+int sp_platform_init(void)
+{
+ return platform_driver_register(&sp_platform_driver);
+}
+
+void sp_platform_exit(void)
+{
+ platform_driver_unregister(&sp_platform_driver);
+}
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