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crypto: ccp - Introduce the AMD Secure Processor device

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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>
This commit is contained in:
Brijesh Singh
2017-07-06 09:59:14 -05:00
committed by Herbert Xu
parent 970e8303cb
commit 720419f018
12 changed files with 468 additions and 169 deletions
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116
drivers/crypto/ccp/ccp-dev.c
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@@ -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;
struct device *dev = sp->dev;
struct ccp_device *ccp;
int ret;
ret = -ENOMEM;
ccp = ccp_alloc_struct(sp);
if (!ccp)
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->get_irq = sp->get_irq;
ccp->free_irq = sp->free_irq;
ccp->io_regs = sp->io_map + ccp->vdata->offset;
if (ccp->vdata->setup)
ccp->vdata->setup(ccp);
return ccp->vdata->perform->init(ccp);
ret = ccp->vdata->perform->init(ccp);
if (ret)
goto e_err;
dev_notice(dev, "ccp enabled\n");
return 0;
e_err:
sp->ccp_data = NULL;
dev_notice(dev, "ccp initialization failed\n");
return ret;
}
void ccp_dev_destroy(struct ccp_device *ccp)
void ccp_dev_destroy(struct sp_device *sp)
{
struct ccp_device *ccp = sp->ccp_data;
if (!ccp)
return;
ccp->vdata->perform->destroy(ccp);
}
static int __init ccp_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 ccp_mod_exit(void)
{
#ifdef CONFIG_X86
ccp_pci_exit();
#endif
#ifdef CONFIG_ARM64
ccp_platform_exit();
#endif
}
module_init(ccp_mod_init);
module_exit(ccp_mod_exit);