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| author |   Gary R Hook <gary.hook@amd.com> | 2016-07-26 19:10:13 -0500 |
|---|---|---|
| committer |   Herbert Xu <herbert@gondor.apana.org.au> | 2016-08-09 18:47:10 +0800 |
| commit | bb4e89b34d1bf46156b7e880a0f34205fb7ce2a5 (patch) | |
| tree | 1fed02203f6f76373e9e88bad677295de5c26745 /drivers/crypto/ccp/ccp-dev-v3.c | |
| parent | crypto: ccp - Refactor code supporting the CCP's RNG (diff) | |
| download | linux-dev-bb4e89b34d1bf46156b7e880a0f34205fb7ce2a5.tar.xz linux-dev-bb4e89b34d1bf46156b7e880a0f34205fb7ce2a5.zip | |
crypto: ccp - Refactor code to enable checks for queue space.
Available queue space is used to decide (by counting free slots)
if we have to put a command on hold or if it can be sent
to the engine immediately.
Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/ccp/ccp-dev-v3.c')
| -rw-r--r-- | drivers/crypto/ccp/ccp-dev-v3.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/crypto/ccp/ccp-dev-v3.c b/drivers/crypto/ccp/ccp-dev-v3.c index 373ac4fa4a47..02c8c95fdc2d 100644 --- a/drivers/crypto/ccp/ccp-dev-v3.c +++ b/drivers/crypto/ccp/ccp-dev-v3.c @@ -70,6 +70,11 @@ static void ccp_free_ksb(struct ccp_cmd_queue *cmd_q, unsigned int start, wake_up_interruptible_all(&ccp->sb_queue); } +static unsigned int ccp_get_free_slots(struct ccp_cmd_queue *cmd_q) +{ + return CMD_Q_DEPTH(ioread32(cmd_q->reg_status)); +} + static int ccp_do_cmd(struct ccp_op *op, u32 *cr, unsigned int cr_count) { struct ccp_cmd_queue *cmd_q = op->cmd_q; @@ -357,7 +362,7 @@ static int ccp_init(struct ccp_device *ccp) cmd_q->int_ok = 1 << (i * 2); cmd_q->int_err = 1 << ((i * 2) + 1); - cmd_q->free_slots = CMD_Q_DEPTH(ioread32(cmd_q->reg_status)); + cmd_q->free_slots = ccp_get_free_slots(cmd_q); init_waitqueue_head(&cmd_q->int_queue); @@ -559,6 +564,7 @@ static const struct ccp_actions ccp3_actions = { .sbfree = ccp_free_ksb, .init = ccp_init, .destroy = ccp_destroy, + .get_free_slots = ccp_get_free_slots, .irqhandler = ccp_irq_handler, }; |