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| author | Hook, Gary <Gary.Hook@amd.com> | 2019-07-09 15:07:22 +0000 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-07-26 22:08:03 +1000 |
| commit | c4a89279086e9c98eba659d7665b1732e0d5e3e3 (patch) | |
| tree | 3b28fcadcc0bea7955a6d98362f612cee55fde01 /drivers/crypto/ccp | |
| parent | 93308baf075039dccf347391491773f272cc24f6 (diff) | |
| download | linux-c4a89279086e9c98eba659d7665b1732e0d5e3e3.tar.gz linux-c4a89279086e9c98eba659d7665b1732e0d5e3e3.tar.bz2 linux-c4a89279086e9c98eba659d7665b1732e0d5e3e3.zip | |
crypto: ccp - Add a module parameter to specify a queue count
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>
Diffstat (limited to 'drivers/crypto/ccp')
| -rw-r--r-- | drivers/crypto/ccp/ccp-dev-v3.c | 2 | ||||
| -rw-r--r-- | drivers/crypto/ccp/ccp-dev-v5.c | 7 | ||||
| -rw-r--r-- | drivers/crypto/ccp/ccp-dev.c | 11 | ||||
| -rw-r--r-- | drivers/crypto/ccp/ccp-dev.h | 1 |
4 files changed, 15 insertions, 6 deletions
diff --git a/drivers/crypto/ccp/ccp-dev-v3.c b/drivers/crypto/ccp/ccp-dev-v3.c index 2b7d47ed5c74..4005d438dff9 100644 --- a/drivers/crypto/ccp/ccp-dev-v3.c +++ b/drivers/crypto/ccp/ccp-dev-v3.c @@ -379,7 +379,7 @@ static int ccp_init(struct ccp_device *ccp) /* Find available queues */ ccp->qim = 0; 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; diff --git a/drivers/crypto/ccp/ccp-dev-v5.c b/drivers/crypto/ccp/ccp-dev-v5.c index 35b3d866726d..f146b51a23a5 100644 --- a/drivers/crypto/ccp/ccp-dev-v5.c +++ b/drivers/crypto/ccp/ccp-dev-v5.c @@ -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; diff --git a/drivers/crypto/ccp/ccp-dev.c b/drivers/crypto/ccp/ccp-dev.c index f79eede71c62..352059d0c572 100644 --- a/drivers/crypto/ccp/ccp-dev.c +++ b/drivers/crypto/ccp/ccp-dev.c @@ -8,6 +8,7 @@ * Author: Gary R Hook <gary.hook@amd.com> */ +#include <linux/module.h> #include <linux/kernel.h> #include <linux/kthread.h> #include <linux/sched.h> @@ -26,6 +27,11 @@ #include "ccp-dev.h" +/* Limit CCP use to a specifed number of queues per device */ +static unsigned int nqueues = 0; +module_param(nqueues, uint, 0444); +MODULE_PARM_DESC(nqueues, "Number of queues per CCP (minimum 1; default: all available)"); + struct ccp_tasklet_data { struct completion completion; struct ccp_cmd *cmd; @@ -592,6 +598,11 @@ int ccp_dev_init(struct sp_device *sp) goto e_err; sp->ccp_data = ccp; + if (!nqueues || (nqueues > MAX_HW_QUEUES)) + ccp->max_q_count = MAX_HW_QUEUES; + else + ccp->max_q_count = nqueues; + ccp->vdata = (struct ccp_vdata *)sp->dev_vdata->ccp_vdata; if (!ccp->vdata || !ccp->vdata->version) { ret = -ENODEV; diff --git a/drivers/crypto/ccp/ccp-dev.h b/drivers/crypto/ccp/ccp-dev.h index 5e624920fd99..dd13468111cd 100644 --- a/drivers/crypto/ccp/ccp-dev.h +++ b/drivers/crypto/ccp/ccp-dev.h @@ -379,6 +379,7 @@ struct ccp_device { */ struct ccp_cmd_queue cmd_q[MAX_HW_QUEUES]; unsigned int cmd_q_count; + unsigned int max_q_count; /* Support for the CCP True RNG */ |