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crypto: nx - make platform drivers directly register with crypto

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Remove the common 'platform' registration module, and move the crypto
compression driver registration into each of the pSeries and PowerNV
platform NX 842 drivers.  Change the nx-842.c code into simple common
functions that each platform driver uses to perform constraints-based
buffer changes, i.e. realigning and/or resizing buffers to match the
driver's hardware requirements.

The common 'platform' module was my mistake to create - since each
platform driver will only load/operate when running on its own
platform (i.e. a pSeries platform or a PowerNV platform), they can
directly register with the crypto subsystem, using the same alg and
driver name.  This removes unneeded complexity.

Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Dan Streetman
2015-07-22 14:26:38 -04:00
committed by Herbert Xu
parent 174d66d472
commit 03952d9801
6 changed files with 114 additions and 191 deletions
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29
drivers/crypto/nx/nx-842-powernv.c
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@@ -26,6 +26,8 @@
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Dan Streetman <ddstreet@ieee.org>");
MODULE_DESCRIPTION("842 H/W Compression driver for IBM PowerNV processors");
MODULE_ALIAS_CRYPTO("842");
MODULE_ALIAS_CRYPTO("842-nx");
#define WORKMEM_ALIGN (CRB_ALIGN)
#define CSB_WAIT_MAX (5000) /* ms */
@@ -581,9 +583,29 @@ static struct nx842_driver nx842_powernv_driver = {
.decompress = nx842_powernv_decompress,
};
static int nx842_powernv_crypto_init(struct crypto_tfm *tfm)
{
return nx842_crypto_init(tfm, &nx842_powernv_driver);
}
static struct crypto_alg nx842_powernv_alg = {
.cra_name = "842",
.cra_driver_name = "842-nx",
.cra_priority = 300,
.cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
.cra_ctxsize = sizeof(struct nx842_crypto_ctx),
.cra_module = THIS_MODULE,
.cra_init = nx842_powernv_crypto_init,
.cra_exit = nx842_crypto_exit,
.cra_u = { .compress = {
.coa_compress = nx842_crypto_compress,
.coa_decompress = nx842_crypto_decompress } }
};
static __init int nx842_powernv_init(void)
{
struct device_node *dn;
int ret;
/* verify workmem size/align restrictions */
BUILD_BUG_ON(WORKMEM_ALIGN % CRB_ALIGN);
@@ -600,7 +622,8 @@ static __init int nx842_powernv_init(void)
if (!nx842_ct)
return -ENODEV;
if (!nx842_platform_driver_set(&nx842_powernv_driver)) {
ret = crypto_register_alg(&nx842_powernv_alg);
if (ret) {
struct nx842_coproc *coproc, *n;
list_for_each_entry_safe(coproc, n, &nx842_coprocs, list) {
@@ -608,7 +631,7 @@ static __init int nx842_powernv_init(void)
kfree(coproc);
}
return -EEXIST;
return ret;
}
return 0;
@@ -619,7 +642,7 @@ static void __exit nx842_powernv_exit(void)
{
struct nx842_coproc *coproc, *n;
nx842_platform_driver_unset(&nx842_powernv_driver);
crypto_unregister_alg(&nx842_powernv_alg);
list_for_each_entry_safe(coproc, n, &nx842_coprocs, list) {
list_del(&coproc->list);