[PATCH 03/18] iommu/fsl_pamu: remove support for setting DOMAIN_ATTR_GEOMETRY

Christoph Hellwig
Tue, 16 Mar 2021 15:38:09 -0000

The default geometry is the same as the one set by qman_port given
that FSL_PAMU depends on having 64-bit physical and thus DMA addresses.

Remove the support to update the geometry and remove the now pointless
geom_size field.

Signed-off-by: Christoph Hellwig <hch at lst.de>
Acked-by: Li Yang <leoyang.li at nxp.com>
---
 drivers/iommu/fsl_pamu_domain.c     | 55 +++--------------------------
 drivers/iommu/fsl_pamu_domain.h     |  6 ----
 drivers/soc/fsl/qbman/qman_portal.c | 12 -------
 3 files changed, 5 insertions(+), 68 deletions(-)

diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domain.c
index e587ec43f7e750..7bd08ddad07779 100644
--- a/drivers/iommu/fsl_pamu_domain.c
+++ b/drivers/iommu/fsl_pamu_domain.c
@@ -62,7 +62,7 @@ static phys_addr_t get_phys_addr(struct fsl_dma_domain
*dma_domain, dma_addr_t i

 	geom = &dma_domain->iommu_domain.geometry;

-	if (!win_cnt || !dma_domain->geom_size) {
+	if (!win_cnt) {
 		pr_debug("Number of windows/geometry not configured for the
domain\n");
 		return 0;
 	}
@@ -72,7 +72,7 @@ static phys_addr_t get_phys_addr(struct fsl_dma_domain
*dma_domain, dma_addr_t i
 		dma_addr_t subwin_iova;
 		u32 wnd;

-		subwin_size = dma_domain->geom_size >> ilog2(win_cnt);
+		subwin_size = (geom->aperture_end + 1) >> ilog2(win_cnt);
 		subwin_iova = iova & ~(subwin_size - 1);
 		wnd = (subwin_iova - geom->aperture_start) >> ilog2(subwin_size);
 		win_ptr = &dma_domain->win_arr[wnd];
@@ -234,7 +234,7 @@ static int pamu_set_liodn(int liodn, struct device *dev,
 	get_ome_index(&omi_index, dev);

 	window_addr = geom_attr->aperture_start;
-	window_size = dma_domain->geom_size;
+	window_size = geom_attr->aperture_end + 1;

 	spin_lock_irqsave(&iommu_lock, flags);
 	ret = pamu_disable_liodn(liodn);
@@ -303,7 +303,6 @@ static struct fsl_dma_domain *iommu_alloc_dma_domain(void)
 	domain->stash_id = ~(u32)0;
 	domain->snoop_id = ~(u32)0;
 	domain->win_cnt = pamu_get_max_subwin_cnt();
-	domain->geom_size = 0;

 	INIT_LIST_HEAD(&domain->devices);

@@ -502,7 +501,8 @@ static int fsl_pamu_window_enable(struct iommu_domain
*domain, u32 wnd_nr,
 		return -EINVAL;
 	}

-	win_size = dma_domain->geom_size >> ilog2(dma_domain->win_cnt);
+	win_size = (domain->geometry.aperture_end + 1) >>
+			ilog2(dma_domain->win_cnt);
 	if (size > win_size) {
 		pr_debug("Invalid window size\n");
 		spin_unlock_irqrestore(&dma_domain->domain_lock, flags);
@@ -665,41 +665,6 @@ static void fsl_pamu_detach_device(struct iommu_domain
*domain,
 		pr_debug("missing fsl,liodn property at %pOF\n", dev->of_node);
 }

-static  int configure_domain_geometry(struct iommu_domain *domain, void *data)
-{
-	struct iommu_domain_geometry *geom_attr = data;
-	struct fsl_dma_domain *dma_domain = to_fsl_dma_domain(domain);
-	dma_addr_t geom_size;
-	unsigned long flags;
-
-	geom_size = geom_attr->aperture_end - geom_attr->aperture_start + 1;
-	/*
-	 * Sanity check the geometry size. Also, we do not support
-	 * DMA outside of the geometry.
-	 */
-	if (check_size(geom_size, geom_attr->aperture_start) ||
-	    !geom_attr->force_aperture) {
-		pr_debug("Invalid PAMU geometry attributes\n");
-		return -EINVAL;
-	}
-
-	spin_lock_irqsave(&dma_domain->domain_lock, flags);
-	if (dma_domain->enabled) {
-		pr_debug("Can't set geometry attributes as domain is
active\n");
-		spin_unlock_irqrestore(&dma_domain->domain_lock, flags);
-		return  -EBUSY;
-	}
-
-	/* Copy the domain geometry information */
-	memcpy(&domain->geometry, geom_attr,
-	       sizeof(struct iommu_domain_geometry));
-	dma_domain->geom_size = geom_size;
-
-	spin_unlock_irqrestore(&dma_domain->domain_lock, flags);
-
-	return 0;
-}
-
 /* Set the domain stash attribute */
 static int configure_domain_stash(struct fsl_dma_domain *dma_domain, void
*data)
 {
@@ -769,13 +734,6 @@ static int fsl_pamu_set_windows(struct iommu_domain
*domain, u32 w_count)
 		return  -EBUSY;
 	}

-	/* Ensure that the geometry has been set for the domain */
-	if (!dma_domain->geom_size) {
-		pr_debug("Please configure geometry before setting the number of
windows\n");
-		spin_unlock_irqrestore(&dma_domain->domain_lock, flags);
-		return -EINVAL;
-	}
-
 	/*
 	 * Ensure we have valid window count i.e. it should be less than
 	 * maximum permissible limit and should be a power of two.
@@ -811,9 +769,6 @@ static int fsl_pamu_set_domain_attr(struct iommu_domain
*domain,
 	int ret = 0;

 	switch (attr_type) {
-	case DOMAIN_ATTR_GEOMETRY:
-		ret = configure_domain_geometry(domain, data);
-		break;
 	case DOMAIN_ATTR_FSL_PAMU_STASH:
 		ret = configure_domain_stash(dma_domain, data);
 		break;
diff --git a/drivers/iommu/fsl_pamu_domain.h b/drivers/iommu/fsl_pamu_domain.h
index 2865d42782e802..53d359d66fe577 100644
--- a/drivers/iommu/fsl_pamu_domain.h
+++ b/drivers/iommu/fsl_pamu_domain.h
@@ -17,12 +17,6 @@ struct dma_window {
 };

 struct fsl_dma_domain {
-	/*
-	 * Indicates the geometry size for the domain.
-	 * This would be set when the geometry is
-	 * configured for the domain.
-	 */
-	dma_addr_t			geom_size;
 	/*
 	 * Number of windows assocaited with this domain.
 	 * During domain initialization, it is set to the
diff --git a/drivers/soc/fsl/qbman/qman_portal.c
b/drivers/soc/fsl/qbman/qman_portal.c
index 5685b67068931a..c958e6310d3094 100644
--- a/drivers/soc/fsl/qbman/qman_portal.c
+++ b/drivers/soc/fsl/qbman/qman_portal.c
@@ -47,7 +47,6 @@ static void portal_set_cpu(struct qm_portal_config *pcfg, int
cpu)
 #ifdef CONFIG_FSL_PAMU
 	struct device *dev = pcfg->dev;
 	int window_count = 1;
-	struct iommu_domain_geometry geom_attr;
 	struct pamu_stash_attribute stash_attr;
 	int ret;

@@ -56,17 +55,6 @@ static void portal_set_cpu(struct qm_portal_config *pcfg, int
cpu)
 		dev_err(dev, "%s(): iommu_domain_alloc() failed", __func__);
 		goto no_iommu;
 	}
-	geom_attr.aperture_start = 0;
-	geom_attr.aperture_end -		((dma_addr_t)1 << min(8 * sizeof(dma_addr_t),
(size_t)36)) - 1;
-	geom_attr.force_aperture = true;
-	ret = iommu_domain_set_attr(pcfg->iommu_domain, DOMAIN_ATTR_GEOMETRY,
-				    &geom_attr);
-	if (ret < 0) {
-		dev_err(dev, "%s(): iommu_domain_set_attr() = %d", __func__,
-			ret);
-		goto out_domain_free;
-	}
 	ret = iommu_domain_set_attr(pcfg->iommu_domain, DOMAIN_ATTR_WINDOWS,
 				    &window_count);
 	if (ret < 0) {
--
2.30.1