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From: Will Deacon <will@kernel.org>
To: Christoph Hellwig <hch@lst.de>
Cc: Joerg Roedel <joro@8bytes.org>, Li Yang <leoyang.li@nxp.com>,
	Michael Ellerman <mpe@ellerman.id.au>,
	David Woodhouse <dwmw2@infradead.org>,
	Lu Baolu <baolu.lu@linux.intel.com>,
	linuxppc-dev@lists.ozlabs.org, linux-arm-msm@vger.kernel.org,
	dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org,
	iommu@lists.linux-foundation.org,
	linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	netdev@vger.kernel.org
Subject: Re: [PATCH 08/18] iommu/fsl_pamu: merge pamu_set_liodn and map_liodn
Date: Tue, 30 Mar 2021 13:46:51 +0100	[thread overview]
Message-ID: <20210330124651.GH5908@willie-the-truck> (raw)
In-Reply-To: <20210316153825.135976-9-hch@lst.de>

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

  reply	other threads:[~2021-03-30 12:47 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-16 15:38 cleanup unused or almost unused IOMMU APIs and the FSL PAMU driver v2 Christoph Hellwig
2021-03-16 15:38 ` [PATCH 01/18] iommu: remove the unused domain_window_disable method Christoph Hellwig
2021-03-30 12:04   ` Will Deacon
2021-03-16 15:38 ` [PATCH 02/18] iommu/fsl_pamu: remove fsl_pamu_get_domain_attr Christoph Hellwig
2021-03-30 12:10   ` Will Deacon
2021-03-16 15:38 ` [PATCH 03/18] iommu/fsl_pamu: remove support for setting DOMAIN_ATTR_GEOMETRY Christoph Hellwig
2021-03-30 12:15   ` Will Deacon
2021-03-16 15:38 ` [PATCH 04/18] iommu/fsl_pamu: merge iommu_alloc_dma_domain into fsl_pamu_domain_alloc Christoph Hellwig
2021-03-30 12:17   ` Will Deacon
2021-03-16 15:38 ` [PATCH 05/18] iommu/fsl_pamu: remove support for multiple windows Christoph Hellwig
2021-03-30 12:22   ` Will Deacon
2021-04-01  9:29     ` Christoph Hellwig
2021-03-16 15:38 ` [PATCH 06/18] iommu/fsl_pamu: remove ->domain_window_enable Christoph Hellwig
2021-03-30 12:40   ` Will Deacon
2021-04-01  9:32     ` Christoph Hellwig
2021-03-16 15:38 ` [PATCH 07/18] iommu/fsl_pamu: replace DOMAIN_ATTR_FSL_PAMU_STASH with a direct call Christoph Hellwig
2021-03-30 12:44   ` Will Deacon
2021-03-16 15:38 ` [PATCH 08/18] iommu/fsl_pamu: merge pamu_set_liodn and map_liodn Christoph Hellwig
2021-03-30 12:46   ` Will Deacon [this message]
2021-04-01  9:34     ` Christoph Hellwig
2021-03-16 15:38 ` [PATCH 09/18] iommu/fsl_pamu: merge handle_attach_device into fsl_pamu_attach_device Christoph Hellwig
2021-03-30 12:48   ` Will Deacon
2021-03-16 15:38 ` [PATCH 10/18] iommu/fsl_pamu: enable the liodn when attaching a device Christoph Hellwig
2021-03-30 12:53   ` Will Deacon
2021-03-16 15:38 ` [PATCH 11/18] iommu/fsl_pamu: remove the snoop_id field Christoph Hellwig
2021-03-30 12:58   ` Will Deacon
2021-04-01  9:36     ` Christoph Hellwig
2021-03-16 15:38 ` [PATCH 12/18] iommu: remove DOMAIN_ATTR_PAGING Christoph Hellwig
2021-03-30 12:58   ` Will Deacon
2021-03-16 15:38 ` [PATCH 13/18] iommu: remove DOMAIN_ATTR_GEOMETRY Christoph Hellwig
2021-03-30 13:00   ` Will Deacon
2021-03-16 15:38 ` [PATCH 14/18] iommu: remove DOMAIN_ATTR_NESTING Christoph Hellwig
2021-03-30 13:04   ` Will Deacon
2021-03-16 15:38 ` [PATCH 15/18] iommu: remove iommu_set_cmd_line_dma_api and iommu_cmd_line_dma_api Christoph Hellwig
2021-03-30 13:05   ` Will Deacon
2021-03-16 15:38 ` [PATCH 16/18] iommu: remove DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE Christoph Hellwig
2021-03-30 13:11   ` Will Deacon
2021-03-30 13:19     ` Robin Murphy
2021-03-30 13:58       ` Will Deacon
2021-03-30 16:28         ` Robin Murphy
2021-03-31 11:49           ` Will Deacon
2021-03-31 13:09             ` Robin Murphy
2021-03-31 15:32               ` Will Deacon
2021-03-31 16:05                 ` Robin Murphy
2021-04-01  9:59                   ` Christoph Hellwig
2021-04-01 13:26                     ` Will Deacon
2021-03-31 16:07   ` Robin Murphy
2021-03-16 15:38 ` [PATCH 17/18] iommu: remove DOMAIN_ATTR_IO_PGTABLE_CFG Christoph Hellwig
2021-03-30 13:14   ` Will Deacon
2021-03-16 15:38 ` [PATCH 18/18] iommu: remove iommu_domain_{get,set}_attr Christoph Hellwig
2021-03-30 13:16   ` Will Deacon

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