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crypto: ccp - Refactor the storage block allocation code

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Move the KSB access/management functions to the v3
device file, and add function pointers to the actions
structure. At the operations layer all of the references
to the storage block will be generic (virtual). This is
in preparation for a version 5 device, in which the
private storage block is managed differently.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Gary R Hook
2016-07-26 19:09:50 -05:00
committed by Herbert Xu
parent 956ee21a6d
commit 58a690b701
3 changed files with 98 additions and 80 deletions
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52
drivers/crypto/ccp/ccp-dev-v3.c
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@@ -20,6 +20,56 @@
#include "ccp-dev.h"
static u32 ccp_alloc_ksb(struct ccp_cmd_queue *cmd_q, unsigned int count)
{
int start;
struct ccp_device *ccp = cmd_q->ccp;
for (;;) {
mutex_lock(&ccp->sb_mutex);
start = (u32)bitmap_find_next_zero_area(ccp->sb,
ccp->sb_count,
ccp->sb_start,
count, 0);
if (start <= ccp->sb_count) {
bitmap_set(ccp->sb, start, count);
mutex_unlock(&ccp->sb_mutex);
break;
}
ccp->sb_avail = 0;
mutex_unlock(&ccp->sb_mutex);
/* Wait for KSB entries to become available */
if (wait_event_interruptible(ccp->sb_queue, ccp->sb_avail))
return 0;
}
return KSB_START + start;
}
static void ccp_free_ksb(struct ccp_cmd_queue *cmd_q, unsigned int start,
unsigned int count)
{
struct ccp_device *ccp = cmd_q->ccp;
if (!start)
return;
mutex_lock(&ccp->sb_mutex);
bitmap_clear(ccp->sb, start - KSB_START, count);
ccp->sb_avail = 1;
mutex_unlock(&ccp->sb_mutex);
wake_up_interruptible_all(&ccp->sb_queue);
}
static int ccp_do_cmd(struct ccp_op *op, u32 *cr, unsigned int cr_count)
{
struct ccp_cmd_queue *cmd_q = op->cmd_q;
@@ -534,6 +584,8 @@ static const struct ccp_actions ccp3_actions = {
.rsa = ccp_perform_rsa,
.passthru = ccp_perform_passthru,
.ecc = ccp_perform_ecc,
.sballoc = ccp_alloc_ksb,
.sbfree = ccp_free_ksb,
.init = ccp_init,
.destroy = ccp_destroy,
.irqhandler = ccp_irq_handler,