diff mbox series

drivers: crypto: caam: jr: Allow quiesce when quiesced

Message ID 20230228183758.448396-1-meenakshi.aggarwal@nxp.com (mailing list archive)
State Accepted
Delegated to: Herbert Xu
Headers show
Series drivers: crypto: caam: jr: Allow quiesce when quiesced | expand

Commit Message

Meenakshi Aggarwal Feb. 28, 2023, 6:37 p.m. UTC 
From: Horia Geanta <horia.geanta@nxp.com>

Issues:
- Job ring device is busy when do kexec reboot
- Failed to flush job ring when do system suspend-resume

Fix:
Flush the job ring to stop the running jobs.

Signed-off-by: Horia Geanta <horia.geanta@nxp.com>
Signed-off-by: Franck LENORMAND <franck.lenormand@nxp.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta@nxp.com>
---
 drivers/crypto/caam/jr.c | 55 ++++++++++++++++++++++++++++++++--------
 1 file changed, 45 insertions(+), 10 deletions(-)

Comments

Meenakshi Aggarwal March 10, 2023, 10:34 a.m. UTC | #1 
Hi Herbert,

Please apply the patch if you have no comments.

Thanks,
Meenakshi

> -----Original Message-----
> From: meenakshi.aggarwal@nxp.com <meenakshi.aggarwal@nxp.com>
> Sent: Wednesday, March 1, 2023 12:08 AM
> To: Horia Geanta <horia.geanta@nxp.com>; Varun Sethi <V.Sethi@nxp.com>;
> Pankaj Gupta <pankaj.gupta@nxp.com>; Gaurav Jain <gaurav.jain@nxp.com>;
> herbert@gondor.apana.org.au; davem@davemloft.net; linux-
> crypto@vger.kernel.org; linux-kernel@vger.kernel.org; Franck Lenormand
> <franck.lenormand@nxp.com>
> Cc: vijayb@linux.microsoft.com; code@tyhicks.com
> Subject: [PATCH] drivers: crypto: caam: jr: Allow quiesce when quiesced
> 
> From: Horia Geanta <horia.geanta@nxp.com>
> 
> Issues:
> - Job ring device is busy when do kexec reboot
> - Failed to flush job ring when do system suspend-resume
> 
> Fix:
> Flush the job ring to stop the running jobs.
> 
> Signed-off-by: Horia Geanta <horia.geanta@nxp.com>
> Signed-off-by: Franck LENORMAND <franck.lenormand@nxp.com>
> Reviewed-by: Pankaj Gupta <pankaj.gupta@nxp.com>
> ---
>  drivers/crypto/caam/jr.c | 55 ++++++++++++++++++++++++++++++++--------
>  1 file changed, 45 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/crypto/caam/jr.c b/drivers/crypto/caam/jr.c index
> 724fdec18bf9..eb3b9a7e9a35 100644
> --- a/drivers/crypto/caam/jr.c
> +++ b/drivers/crypto/caam/jr.c
> @@ -4,7 +4,7 @@
>   * JobR backend functionality
>   *
>   * Copyright 2008-2012 Freescale Semiconductor, Inc.
> - * Copyright 2019 NXP
> + * Copyright 2019, 2023 NXP
>   */
> 
>  #include <linux/of_irq.h>
> @@ -72,19 +72,27 @@ static void caam_jr_crypto_engine_exit(void *data)
>  	crypto_engine_exit(jrpriv->engine);
>  }
> 
> -static int caam_reset_hw_jr(struct device *dev)
> +/*
> + * Put the CAAM in quiesce, ie stop
> + *
> + * Must be called with itr disabled
> + */
> +static int caam_jr_stop_processing(struct device *dev, u32 jrcr_bits)
>  {
>  	struct caam_drv_private_jr *jrp = dev_get_drvdata(dev);
>  	unsigned int timeout = 100000;
> 
> -	/*
> -	 * mask interrupts since we are going to poll
> -	 * for reset completion status
> -	 */
> -	clrsetbits_32(&jrp->rregs->rconfig_lo, 0, JRCFG_IMSK);
> +	/* Check the current status */
> +	if (rd_reg32(&jrp->rregs->jrintstatus) & JRINT_ERR_HALT_INPROGRESS)
> +		goto wait_quiesce_completion;
> 
> -	/* initiate flush (required prior to reset) */
> -	wr_reg32(&jrp->rregs->jrcommand, JRCR_RESET);
> +	/* Reset the field */
> +	clrsetbits_32(&jrp->rregs->jrintstatus, JRINT_ERR_HALT_MASK, 0);
> +
> +	/* initiate flush / park (required prior to reset) */
> +	wr_reg32(&jrp->rregs->jrcommand, jrcr_bits);
> +
> +wait_quiesce_completion:
>  	while (((rd_reg32(&jrp->rregs->jrintstatus) & JRINT_ERR_HALT_MASK)
> ==
>  		JRINT_ERR_HALT_INPROGRESS) && --timeout)
>  		cpu_relax();
> @@ -95,8 +103,35 @@ static int caam_reset_hw_jr(struct device *dev)
>  		return -EIO;
>  	}
> 
> +	return 0;
> +}
> +
> +/*
> + * Flush the job ring, so the jobs running will be stopped, jobs queued
> +will be
> + * invalidated and the CAAM will no longer fetch fron input ring.
> + *
> + * Must be called with itr disabled
> + */
> +static int caam_jr_flush(struct device *dev) {
> +	return caam_jr_stop_processing(dev, JRCR_RESET); }
> +
> +static int caam_reset_hw_jr(struct device *dev) {
> +	struct caam_drv_private_jr *jrp = dev_get_drvdata(dev);
> +	unsigned int timeout = 100000;
> +	int err;
> +	/*
> +	 * mask interrupts since we are going to poll
> +	 * for reset completion status
> +	 */
> +	clrsetbits_32(&jrp->rregs->rconfig_lo, 0, JRCFG_IMSK);
> +	err = caam_jr_flush(dev);
> +	if (err)
> +		return err;
> +
>  	/* initiate reset */
> -	timeout = 100000;
>  	wr_reg32(&jrp->rregs->jrcommand, JRCR_RESET);
>  	while ((rd_reg32(&jrp->rregs->jrcommand) & JRCR_RESET) && --timeout)
>  		cpu_relax();
> --
> 2.25.1
Herbert Xu March 10, 2023, 11:32 a.m. UTC | #2 
On Wed, Mar 01, 2023 at 12:07:58AM +0530, meenakshi.aggarwal@nxp.com wrote:
> From: Horia Geanta <horia.geanta@nxp.com>
> 
> Issues:
> - Job ring device is busy when do kexec reboot
> - Failed to flush job ring when do system suspend-resume
> 
> Fix:
> Flush the job ring to stop the running jobs.
> 
> Signed-off-by: Horia Geanta <horia.geanta@nxp.com>
> Signed-off-by: Franck LENORMAND <franck.lenormand@nxp.com>
> Reviewed-by: Pankaj Gupta <pankaj.gupta@nxp.com>
> ---
>  drivers/crypto/caam/jr.c | 55 ++++++++++++++++++++++++++++++++--------
>  1 file changed, 45 insertions(+), 10 deletions(-)

Patch applied.  Thanks.
diff mbox series

Patch

diff --git a/drivers/crypto/caam/jr.c b/drivers/crypto/caam/jr.c
index 724fdec18bf9..eb3b9a7e9a35 100644
--- a/drivers/crypto/caam/jr.c
+++ b/drivers/crypto/caam/jr.c
@@ -4,7 +4,7 @@ 
  * JobR backend functionality
  *
  * Copyright 2008-2012 Freescale Semiconductor, Inc.
- * Copyright 2019 NXP
+ * Copyright 2019, 2023 NXP
  */
 
 #include <linux/of_irq.h>
@@ -72,19 +72,27 @@  static void caam_jr_crypto_engine_exit(void *data)
 	crypto_engine_exit(jrpriv->engine);
 }
 
-static int caam_reset_hw_jr(struct device *dev)
+/*
+ * Put the CAAM in quiesce, ie stop
+ *
+ * Must be called with itr disabled
+ */
+static int caam_jr_stop_processing(struct device *dev, u32 jrcr_bits)
 {
 	struct caam_drv_private_jr *jrp = dev_get_drvdata(dev);
 	unsigned int timeout = 100000;
 
-	/*
-	 * mask interrupts since we are going to poll
-	 * for reset completion status
-	 */
-	clrsetbits_32(&jrp->rregs->rconfig_lo, 0, JRCFG_IMSK);
+	/* Check the current status */
+	if (rd_reg32(&jrp->rregs->jrintstatus) & JRINT_ERR_HALT_INPROGRESS)
+		goto wait_quiesce_completion;
 
-	/* initiate flush (required prior to reset) */
-	wr_reg32(&jrp->rregs->jrcommand, JRCR_RESET);
+	/* Reset the field */
+	clrsetbits_32(&jrp->rregs->jrintstatus, JRINT_ERR_HALT_MASK, 0);
+
+	/* initiate flush / park (required prior to reset) */
+	wr_reg32(&jrp->rregs->jrcommand, jrcr_bits);
+
+wait_quiesce_completion:
 	while (((rd_reg32(&jrp->rregs->jrintstatus) & JRINT_ERR_HALT_MASK) ==
 		JRINT_ERR_HALT_INPROGRESS) && --timeout)
 		cpu_relax();
@@ -95,8 +103,35 @@  static int caam_reset_hw_jr(struct device *dev)
 		return -EIO;
 	}
 
+	return 0;
+}
+
+/*
+ * Flush the job ring, so the jobs running will be stopped, jobs queued will be
+ * invalidated and the CAAM will no longer fetch fron input ring.
+ *
+ * Must be called with itr disabled
+ */
+static int caam_jr_flush(struct device *dev)
+{
+	return caam_jr_stop_processing(dev, JRCR_RESET);
+}
+
+static int caam_reset_hw_jr(struct device *dev)
+{
+	struct caam_drv_private_jr *jrp = dev_get_drvdata(dev);
+	unsigned int timeout = 100000;
+	int err;
+	/*
+	 * mask interrupts since we are going to poll
+	 * for reset completion status
+	 */
+	clrsetbits_32(&jrp->rregs->rconfig_lo, 0, JRCFG_IMSK);
+	err = caam_jr_flush(dev);
+	if (err)
+		return err;
+
 	/* initiate reset */
-	timeout = 100000;
 	wr_reg32(&jrp->rregs->jrcommand, JRCR_RESET);
 	while ((rd_reg32(&jrp->rregs->jrcommand) & JRCR_RESET) && --timeout)
 		cpu_relax();