diff mbox series

[08/18] iommu/fsl_pamu: merge pamu_set_liodn and map_liodn

Message ID 20210316153825.135976-9-hch@lst.de
State Superseded
Headers show
Series [01/18] iommu: remove the unused domain_window_disable method | expand

Commit Message

Christoph Hellwig March 16, 2021, 3:38 p.m. UTC 
Merge the two fuctions that configure the ppaace into a single coherent
function.  I somehow doubt we need the two pamu_config_ppaace calls,
but keep the existing behavior just to be on the safe side.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Li Yang <leoyang.li@nxp.com>
---
 drivers/iommu/fsl_pamu_domain.c | 65 +++++++++------------------------
 1 file changed, 17 insertions(+), 48 deletions(-)

Comments

Will Deacon March 30, 2021, 12:46 p.m. UTC | #1 
On Tue, Mar 16, 2021 at 04:38:14PM +0100, Christoph Hellwig wrote:
> Merge the two fuctions that configure the ppaace into a single coherent
> function.  I somehow doubt we need the two pamu_config_ppaace calls,
> but keep the existing behavior just to be on the safe side.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> Acked-by: Li Yang <leoyang.li@nxp.com>
> ---
>  drivers/iommu/fsl_pamu_domain.c | 65 +++++++++------------------------
>  1 file changed, 17 insertions(+), 48 deletions(-)
> 
> diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domain.c
> index 40eff4b7bc5d42..4a4944332674f7 100644
> --- a/drivers/iommu/fsl_pamu_domain.c
> +++ b/drivers/iommu/fsl_pamu_domain.c
> @@ -54,25 +54,6 @@ static int __init iommu_init_mempool(void)
>  	return 0;
>  }
>  
> -/* Map the DMA window corresponding to the LIODN */
> -static int map_liodn(int liodn, struct fsl_dma_domain *dma_domain)
> -{
> -	int ret;
> -	struct iommu_domain_geometry *geom = &dma_domain->iommu_domain.geometry;
> -	unsigned long flags;
> -
> -	spin_lock_irqsave(&iommu_lock, flags);
> -	ret = pamu_config_ppaace(liodn, geom->aperture_start,
> -				 geom->aperture_end - 1, ~(u32)0,
> -				 0, dma_domain->snoop_id, dma_domain->stash_id,
> -				 PAACE_AP_PERMS_QUERY | PAACE_AP_PERMS_UPDATE);
> -	spin_unlock_irqrestore(&iommu_lock, flags);
> -	if (ret)
> -		pr_debug("PAACE configuration failed for liodn %d\n", liodn);
> -
> -	return ret;
> -}
> -
>  static int update_liodn_stash(int liodn, struct fsl_dma_domain *dma_domain,
>  			      u32 val)
>  {
> @@ -94,11 +75,11 @@ static int update_liodn_stash(int liodn, struct fsl_dma_domain *dma_domain,
>  }
>  
>  /* Set the geometry parameters for a LIODN */
> -static int pamu_set_liodn(int liodn, struct device *dev,
> -			  struct fsl_dma_domain *dma_domain,
> -			  struct iommu_domain_geometry *geom_attr)
> +static int pamu_set_liodn(struct fsl_dma_domain *dma_domain, struct device *dev,
> +			  int liodn)
>  {
> -	phys_addr_t window_addr, window_size;
> +	struct iommu_domain *domain = &dma_domain->iommu_domain;
> +	struct iommu_domain_geometry *geom = &domain->geometry;
>  	u32 omi_index = ~(u32)0;
>  	unsigned long flags;
>  	int ret;
> @@ -110,22 +91,25 @@ static int pamu_set_liodn(int liodn, struct device *dev,
>  	 */
>  	get_ome_index(&omi_index, dev);
>  
> -	window_addr = geom_attr->aperture_start;
> -	window_size = geom_attr->aperture_end + 1;
> -
>  	spin_lock_irqsave(&iommu_lock, flags);
>  	ret = pamu_disable_liodn(liodn);
> -	if (!ret)
> -		ret = pamu_config_ppaace(liodn, window_addr, window_size, omi_index,
> -					 0, dma_domain->snoop_id,
> -					 dma_domain->stash_id, 0);
> +	if (ret)
> +		goto out_unlock;
> +	ret = pamu_config_ppaace(liodn, geom->aperture_start,
> +				 geom->aperture_end - 1, omi_index, 0,
> +				 dma_domain->snoop_id, dma_domain->stash_id, 0);
> +	if (ret)
> +		goto out_unlock;
> +	ret = pamu_config_ppaace(liodn, geom->aperture_start,
> +				 geom->aperture_end - 1, ~(u32)0,
> +				 0, dma_domain->snoop_id, dma_domain->stash_id,
> +				 PAACE_AP_PERMS_QUERY | PAACE_AP_PERMS_UPDATE);

There's more '+1' / '-1' confusion here with aperture_end which I'm not
managing to follow. What am I missing?

Will
Christoph Hellwig April 1, 2021, 9:34 a.m. UTC | #2 
On Tue, Mar 30, 2021 at 01:46:51PM +0100, Will Deacon wrote:
> > +	ret = pamu_config_ppaace(liodn, geom->aperture_start,

> > +				 geom->aperture_end - 1, ~(u32)0,

> > +				 0, dma_domain->snoop_id, dma_domain->stash_id,

> > +				 PAACE_AP_PERMS_QUERY | PAACE_AP_PERMS_UPDATE);

> 

> There's more '+1' / '-1' confusion here with aperture_end which I'm not

> managing to follow. What am I missing?


You did not missing anything, I messed this up.   Fixed.
diff mbox series

Patch

diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domain.c
index 40eff4b7bc5d42..4a4944332674f7 100644
--- a/drivers/iommu/fsl_pamu_domain.c
+++ b/drivers/iommu/fsl_pamu_domain.c
@@ -54,25 +54,6 @@  static int __init iommu_init_mempool(void)
 	return 0;
 }
 
-/* Map the DMA window corresponding to the LIODN */
-static int map_liodn(int liodn, struct fsl_dma_domain *dma_domain)
-{
-	int ret;
-	struct iommu_domain_geometry *geom = &dma_domain->iommu_domain.geometry;
-	unsigned long flags;
-
-	spin_lock_irqsave(&iommu_lock, flags);
-	ret = pamu_config_ppaace(liodn, geom->aperture_start,
-				 geom->aperture_end - 1, ~(u32)0,
-				 0, dma_domain->snoop_id, dma_domain->stash_id,
-				 PAACE_AP_PERMS_QUERY | PAACE_AP_PERMS_UPDATE);
-	spin_unlock_irqrestore(&iommu_lock, flags);
-	if (ret)
-		pr_debug("PAACE configuration failed for liodn %d\n", liodn);
-
-	return ret;
-}
-
 static int update_liodn_stash(int liodn, struct fsl_dma_domain *dma_domain,
 			      u32 val)
 {
@@ -94,11 +75,11 @@  static int update_liodn_stash(int liodn, struct fsl_dma_domain *dma_domain,
 }
 
 /* Set the geometry parameters for a LIODN */
-static int pamu_set_liodn(int liodn, struct device *dev,
-			  struct fsl_dma_domain *dma_domain,
-			  struct iommu_domain_geometry *geom_attr)
+static int pamu_set_liodn(struct fsl_dma_domain *dma_domain, struct device *dev,
+			  int liodn)
 {
-	phys_addr_t window_addr, window_size;
+	struct iommu_domain *domain = &dma_domain->iommu_domain;
+	struct iommu_domain_geometry *geom = &domain->geometry;
 	u32 omi_index = ~(u32)0;
 	unsigned long flags;
 	int ret;
@@ -110,22 +91,25 @@  static int pamu_set_liodn(int liodn, struct device *dev,
 	 */
 	get_ome_index(&omi_index, dev);
 
-	window_addr = geom_attr->aperture_start;
-	window_size = geom_attr->aperture_end + 1;
-
 	spin_lock_irqsave(&iommu_lock, flags);
 	ret = pamu_disable_liodn(liodn);
-	if (!ret)
-		ret = pamu_config_ppaace(liodn, window_addr, window_size, omi_index,
-					 0, dma_domain->snoop_id,
-					 dma_domain->stash_id, 0);
+	if (ret)
+		goto out_unlock;
+	ret = pamu_config_ppaace(liodn, geom->aperture_start,
+				 geom->aperture_end - 1, omi_index, 0,
+				 dma_domain->snoop_id, dma_domain->stash_id, 0);
+	if (ret)
+		goto out_unlock;
+	ret = pamu_config_ppaace(liodn, geom->aperture_start,
+				 geom->aperture_end - 1, ~(u32)0,
+				 0, dma_domain->snoop_id, dma_domain->stash_id,
+				 PAACE_AP_PERMS_QUERY | PAACE_AP_PERMS_UPDATE);
+out_unlock:
 	spin_unlock_irqrestore(&iommu_lock, flags);
 	if (ret) {
 		pr_debug("PAACE configuration failed for liodn %d\n",
 			 liodn);
-		return ret;
 	}
-
 	return ret;
 }
 
@@ -265,7 +249,6 @@  static int handle_attach_device(struct fsl_dma_domain *dma_domain,
 				int num)
 {
 	unsigned long flags;
-	struct iommu_domain *domain = &dma_domain->iommu_domain;
 	int ret = 0;
 	int i;
 
@@ -280,21 +263,7 @@  static int handle_attach_device(struct fsl_dma_domain *dma_domain,
 		}
 
 		attach_device(dma_domain, liodn[i], dev);
-		/*
-		 * Check if geometry has already been configured
-		 * for the domain. If yes, set the geometry for
-		 * the LIODN.
-		 */
-		ret = pamu_set_liodn(liodn[i], dev, dma_domain,
-				     &domain->geometry);
-		if (ret)
-			break;
-
-		/*
-		 * Create window/subwindow mapping for
-		 * the LIODN.
-		 */
-		ret = map_liodn(liodn[i], dma_domain);
+		ret = pamu_set_liodn(dma_domain, dev, liodn[i]);
 		if (ret)
 			break;
 	}