[PATCH 03/20] iommu/fsl_pamu: remove support for setting DOMAIN_ATTR_GEOMETRY

Christoph Hellwig
2021-04-01T17:42:25Z

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@lst.de>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Li Yang <leoyang.li@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