[PATCH 13/20] iommu/fsl_pamu: hardcode the window address and size in pamu_config_ppaace

From: Christoph Hellwig <hch@lst.de>
To: Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
	Li Yang <leoyang.li@nxp.com>
Cc: freedreno@lists.freedesktop.org, kvm@vger.kernel.org,
	Michael Ellerman <mpe@ellerman.id.au>,
	linuxppc-dev@lists.ozlabs.org, dri-devel@lists.freedesktop.org,
	virtualization@lists.linux-foundation.org,
	iommu@lists.linux-foundation.org, netdev@vger.kernel.org,
	linux-arm-msm@vger.kernel.org,
	David Woodhouse <dwmw2@infradead.org>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 13/20] iommu/fsl_pamu: hardcode the window address and size in pamu_config_ppaace
Date: Thu,  1 Apr 2021 17:52:49 +0200	[thread overview]
Message-ID: <20210401155256.298656-14-hch@lst.de> (raw)
In-Reply-To: <20210401155256.298656-1-hch@lst.de>

The win_addr and win_size parameters are always set to 0 and 1 << 36
respectively, so just hard code them.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/iommu/fsl_pamu.c        | 23 ++++-------------------
 drivers/iommu/fsl_pamu.h        |  3 +--
 drivers/iommu/fsl_pamu_domain.c | 10 ++--------
 3 files changed, 7 insertions(+), 29 deletions(-)

diff --git a/drivers/iommu/fsl_pamu.c b/drivers/iommu/fsl_pamu.c
index 742fa0e8c45b88..fc38b1fba7cff0 100644
--- a/drivers/iommu/fsl_pamu.c
+++ b/drivers/iommu/fsl_pamu.c
@@ -178,8 +178,6 @@ int pamu_update_paace_stash(int liodn, u32 value)
  * pamu_config_paace() - Sets up PPAACE entry for specified liodn
  *
  * @liodn: Logical IO device number
- * @win_addr: starting address of DSA window
- * @win-size: size of DSA window
  * @omi: Operation mapping index -- if ~omi == 0 then omi not defined
  * @stashid: cache stash id for associated cpu -- if ~stashid == 0 then
  *	     stashid not defined
@@ -187,35 +185,22 @@ int pamu_update_paace_stash(int liodn, u32 value)
  *
  * Returns 0 upon success else error code < 0 returned
  */
-int pamu_config_ppaace(int liodn, phys_addr_t win_addr, phys_addr_t win_size,
-		       u32 omi, u32 stashid, int prot)
+int pamu_config_ppaace(int liodn, u32 omi, u32 stashid, int prot)
 {
 	struct paace *ppaace;
 
-	if ((win_size & (win_size - 1)) || win_size < PAMU_PAGE_SIZE) {
-		pr_debug("window size too small or not a power of two %pa\n",
-			 &win_size);
-		return -EINVAL;
-	}
-
-	if (win_addr & (win_size - 1)) {
-		pr_debug("window address is not aligned with window size\n");
-		return -EINVAL;
-	}
-
 	ppaace = pamu_get_ppaace(liodn);
 	if (!ppaace)
 		return -ENOENT;
 
 	/* window size is 2^(WSE+1) bytes */
 	set_bf(ppaace->addr_bitfields, PPAACE_AF_WSE,
-	       map_addrspace_size_to_wse(win_size));
+	       map_addrspace_size_to_wse(1ULL << 36));
 
 	pamu_init_ppaace(ppaace);
 
-	ppaace->wbah = win_addr >> (PAMU_PAGE_SHIFT + 20);
-	set_bf(ppaace->addr_bitfields, PPAACE_AF_WBAL,
-	       (win_addr >> PAMU_PAGE_SHIFT));
+	ppaace->wbah = 0;
+	set_bf(ppaace->addr_bitfields, PPAACE_AF_WBAL, 0);
 
 	/* set up operation mapping if it's configured */
 	if (omi < OME_NUMBER_ENTRIES) {
diff --git a/drivers/iommu/fsl_pamu.h b/drivers/iommu/fsl_pamu.h
index c96b29f0c7077f..36df7975ff64d3 100644
--- a/drivers/iommu/fsl_pamu.h
+++ b/drivers/iommu/fsl_pamu.h
@@ -383,8 +383,7 @@ struct ome {
 int pamu_domain_init(void);
 int pamu_enable_liodn(int liodn);
 int pamu_disable_liodn(int liodn);
-int pamu_config_ppaace(int liodn, phys_addr_t win_addr, phys_addr_t win_size,
-		       u32 omi, uint32_t stashid, int prot);
+int pamu_config_ppaace(int liodn, u32 omi, uint32_t stashid, int prot);
 
 u32 get_stash_id(u32 stash_dest_hint, u32 vcpu);
 void get_ome_index(u32 *omi_index, struct device *dev);
diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domain.c
index c83f1e7c2cb0c9..32944d67baa495 100644
--- a/drivers/iommu/fsl_pamu_domain.c
+++ b/drivers/iommu/fsl_pamu_domain.c
@@ -78,8 +78,6 @@ static int update_liodn_stash(int liodn, struct fsl_dma_domain *dma_domain,
 static int pamu_set_liodn(struct fsl_dma_domain *dma_domain, struct device *dev,
 			  int liodn)
 {
-	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;
@@ -95,14 +93,10 @@ static int pamu_set_liodn(struct fsl_dma_domain *dma_domain, struct device *dev,
 	ret = pamu_disable_liodn(liodn);
 	if (ret)
 		goto out_unlock;
-	ret = pamu_config_ppaace(liodn, geom->aperture_start,
-				 geom->aperture_end + 1, omi_index,
-				 dma_domain->stash_id, 0);
+	ret = pamu_config_ppaace(liodn, omi_index, dma_domain->stash_id, 0);
 	if (ret)
 		goto out_unlock;
-	ret = pamu_config_ppaace(liodn, geom->aperture_start,
-				 geom->aperture_end + 1, ~(u32)0,
-				 dma_domain->stash_id,
+	ret = pamu_config_ppaace(liodn, ~(u32)0, dma_domain->stash_id,
 				 PAACE_AP_PERMS_QUERY | PAACE_AP_PERMS_UPDATE);
 out_unlock:
 	spin_unlock_irqrestore(&iommu_lock, flags);
-- 
2.30.1

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