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@xxxxxx>
> Acked-by: Li Yang <leoyang.li@xxxxxxx>
> ---
> 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
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