linux-kernel - [PATCH v2 06/10] iommu/rockchip: use page allocation function provided by iommu-pages.h

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Message-ID: <20231130201504.2322355-7-pasha.tatashin@soleen.com>
Date:   Thu, 30 Nov 2023 20:15:00 +0000
From:   Pasha Tatashin <pasha.tatashin@...een.com>
To:     akpm@...ux-foundation.org, alim.akhtar@...sung.com,
        alyssa@...enzweig.io, asahi@...ts.linux.dev,
        baolu.lu@...ux.intel.com, bhelgaas@...gle.com,
        cgroups@...r.kernel.org, corbet@....net, david@...hat.com,
        dwmw2@...radead.org, hannes@...xchg.org, heiko@...ech.de,
        iommu@...ts.linux.dev, jernej.skrabec@...il.com,
        jonathanh@...dia.com, joro@...tes.org,
        krzysztof.kozlowski@...aro.org, linux-doc@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, linux-rockchip@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-sunxi@...ts.linux.dev,
        linux-tegra@...r.kernel.org, lizefan.x@...edance.com,
        marcan@...can.st, mhiramat@...nel.org, m.szyprowski@...sung.com,
        pasha.tatashin@...een.com, paulmck@...nel.org,
        rdunlap@...radead.org, robin.murphy@....com, samuel@...lland.org,
        suravee.suthikulpanit@....com, sven@...npeter.dev,
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        yu-cheng.yu@...el.com
Subject: [PATCH v2 06/10] iommu/rockchip: use page allocation function provided by iommu-pages.h

Convert iommu/rockchip-iommu.c to use the new page allocation functions
provided in iommu-pages.h.

Signed-off-by: Pasha Tatashin <pasha.tatashin@...een.com>
---
 drivers/iommu/rockchip-iommu.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index 2685861c0a12..e04f22d481d0 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -26,6 +26,8 @@
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 
+#include "iommu-pages.h"
+
 /** MMU register offsets */
 #define RK_MMU_DTE_ADDR		0x00	/* Directory table address */
 #define RK_MMU_STATUS		0x04
@@ -727,14 +729,14 @@ static u32 *rk_dte_get_page_table(struct rk_iommu_domain *rk_domain,
 	if (rk_dte_is_pt_valid(dte))
 		goto done;
 
-	page_table = (u32 *)get_zeroed_page(GFP_ATOMIC | rk_ops->gfp_flags);
+	page_table = iommu_alloc_page(GFP_ATOMIC | rk_ops->gfp_flags);
 	if (!page_table)
 		return ERR_PTR(-ENOMEM);
 
 	pt_dma = dma_map_single(dma_dev, page_table, SPAGE_SIZE, DMA_TO_DEVICE);
 	if (dma_mapping_error(dma_dev, pt_dma)) {
 		dev_err(dma_dev, "DMA mapping error while allocating page table\n");
-		free_page((unsigned long)page_table);
+		iommu_free_page(page_table);
 		return ERR_PTR(-ENOMEM);
 	}
 
@@ -1061,7 +1063,7 @@ static struct iommu_domain *rk_iommu_domain_alloc_paging(struct device *dev)
 	 * Each level1 (dt) and level2 (pt) table has 1024 4-byte entries.
 	 * Allocate one 4 KiB page for each table.
 	 */
-	rk_domain->dt = (u32 *)get_zeroed_page(GFP_KERNEL | rk_ops->gfp_flags);
+	rk_domain->dt = iommu_alloc_page(GFP_KERNEL | rk_ops->gfp_flags);
 	if (!rk_domain->dt)
 		goto err_free_domain;
 
@@ -1083,7 +1085,7 @@ static struct iommu_domain *rk_iommu_domain_alloc_paging(struct device *dev)
 	return &rk_domain->domain;
 
 err_free_dt:
-	free_page((unsigned long)rk_domain->dt);
+	iommu_free_page(rk_domain->dt);
 err_free_domain:
 	kfree(rk_domain);
 
@@ -1104,13 +1106,13 @@ static void rk_iommu_domain_free(struct iommu_domain *domain)
 			u32 *page_table = phys_to_virt(pt_phys);
 			dma_unmap_single(dma_dev, pt_phys,
 					 SPAGE_SIZE, DMA_TO_DEVICE);
-			free_page((unsigned long)page_table);
+			iommu_free_page(page_table);
 		}
 	}
 
 	dma_unmap_single(dma_dev, rk_domain->dt_dma,
 			 SPAGE_SIZE, DMA_TO_DEVICE);
-	free_page((unsigned long)rk_domain->dt);
+	iommu_free_page(rk_domain->dt);
 
 	kfree(rk_domain);
 }
-- 
2.43.0.rc2.451.g8631bc7472-goog