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crypto: ccp - Add a module parameter to specify a queue count

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Add a module parameter to limit the number of queues per CCP. The default
value (nqueues=0) is to set up every available queue on each device.

The count of queues starts from the first one found on the device (which
varies based on the device ID).

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:
Hook, Gary
2019-07-09 15:07:22 +00:00
committed by Herbert Xu
parent 93308baf07
commit c4a8927908
4 changed files with 15 additions and 6 deletions
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7
drivers/crypto/ccp/ccp-dev-v5.c
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@@ -2,16 +2,14 @@
/*
* AMD Cryptographic Coprocessor (CCP) driver
*
* Copyright (C) 2016,2017 Advanced Micro Devices, Inc.
* Copyright (C) 2016,2019 Advanced Micro Devices, Inc.
*
* Author: Gary R Hook <gary.hook@amd.com>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/kthread.h>
#include <linux/debugfs.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/compiler.h>
@@ -792,8 +790,7 @@ static int ccp5_init(struct ccp_device *ccp)
/* Find available queues */
qmr = ioread32(ccp->io_regs + Q_MASK_REG);
for (i = 0; i < MAX_HW_QUEUES; i++) {
for (i = 0; (i < MAX_HW_QUEUES) && (ccp->cmd_q_count < ccp->max_q_count); i++) {
if (!(qmr & (1 << i)))
continue;