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Thu, 06 Oct 2022 05:09:23 -0700 (PDT) From: Oleksandr Tyshchenko To: xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org Cc: Oleksandr Tyshchenko , Stefano Stabellini , Juergen Gross , Xenia Ragiadakou Subject: [PATCH] xen/virtio: Convert PAGE_SIZE/PAGE_SHIFT/PFN_UP to Xen counterparts Date: Thu, 6 Oct 2022 15:09:12 +0300 Message-Id: <20221006120912.1948459-1-olekstysh@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1665058222312100001 Content-Type: text/plain; charset="utf-8" From: Oleksandr Tyshchenko Although XEN_PAGE_SIZE is equal to PAGE_SIZE (4KB) for now, it would be more correct to use Xen specific #define-s as XEN_PAGE_SIZE can be changed at some point in the future. Signed-off-by: Oleksandr Tyshchenko Reviewed-by: Juergen Gross --- Cc: Juergen Gross Cc: Xenia Ragiadakou As it was proposed at: https://lore.kernel.org/xen-devel/20221005174823.1800761-1-olekstysh@gmail.= com/ Should go in only after that series. --- drivers/xen/grant-dma-ops.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/xen/grant-dma-ops.c b/drivers/xen/grant-dma-ops.c index c66f56d24013..5392fdc25dca 100644 --- a/drivers/xen/grant-dma-ops.c +++ b/drivers/xen/grant-dma-ops.c @@ -31,12 +31,12 @@ static DEFINE_XARRAY_FLAGS(xen_grant_dma_devices, XA_FL= AGS_LOCK_IRQ); =20 static inline dma_addr_t grant_to_dma(grant_ref_t grant) { - return XEN_GRANT_DMA_ADDR_OFF | ((dma_addr_t)grant << PAGE_SHIFT); + return XEN_GRANT_DMA_ADDR_OFF | ((dma_addr_t)grant << XEN_PAGE_SHIFT); } =20 static inline grant_ref_t dma_to_grant(dma_addr_t dma) { - return (grant_ref_t)((dma & ~XEN_GRANT_DMA_ADDR_OFF) >> PAGE_SHIFT); + return (grant_ref_t)((dma & ~XEN_GRANT_DMA_ADDR_OFF) >> XEN_PAGE_SHIFT); } =20 static struct xen_grant_dma_data *find_xen_grant_dma_data(struct device *d= ev) @@ -79,7 +79,7 @@ static void *xen_grant_dma_alloc(struct device *dev, size= _t size, unsigned long attrs) { struct xen_grant_dma_data *data; - unsigned int i, n_pages =3D PFN_UP(size); + unsigned int i, n_pages =3D XEN_PFN_UP(size); unsigned long pfn; grant_ref_t grant; void *ret; @@ -91,14 +91,14 @@ static void *xen_grant_dma_alloc(struct device *dev, si= ze_t size, if (unlikely(data->broken)) return NULL; =20 - ret =3D alloc_pages_exact(n_pages * PAGE_SIZE, gfp); + ret =3D alloc_pages_exact(n_pages * XEN_PAGE_SIZE, gfp); if (!ret) return NULL; =20 pfn =3D virt_to_pfn(ret); =20 if (gnttab_alloc_grant_reference_seq(n_pages, &grant)) { - free_pages_exact(ret, n_pages * PAGE_SIZE); + free_pages_exact(ret, n_pages * XEN_PAGE_SIZE); return NULL; } =20 @@ -116,7 +116,7 @@ static void xen_grant_dma_free(struct device *dev, size= _t size, void *vaddr, dma_addr_t dma_handle, unsigned long attrs) { struct xen_grant_dma_data *data; - unsigned int i, n_pages =3D PFN_UP(size); + unsigned int i, n_pages =3D XEN_PFN_UP(size); grant_ref_t grant; =20 data =3D find_xen_grant_dma_data(dev); @@ -138,7 +138,7 @@ static void xen_grant_dma_free(struct device *dev, size= _t size, void *vaddr, =20 gnttab_free_grant_reference_seq(grant, n_pages); =20 - free_pages_exact(vaddr, n_pages * PAGE_SIZE); + free_pages_exact(vaddr, n_pages * XEN_PAGE_SIZE); } =20 static struct page *xen_grant_dma_alloc_pages(struct device *dev, size_t s= ize, @@ -168,7 +168,7 @@ static dma_addr_t xen_grant_dma_map_page(struct device = *dev, struct page *page, unsigned long attrs) { struct xen_grant_dma_data *data; - unsigned int i, n_pages =3D PFN_UP(offset + size); + unsigned int i, n_pages =3D XEN_PFN_UP(offset + size); grant_ref_t grant; dma_addr_t dma_handle; =20 @@ -200,8 +200,8 @@ static void xen_grant_dma_unmap_page(struct device *dev= , dma_addr_t dma_handle, unsigned long attrs) { struct xen_grant_dma_data *data; - unsigned long offset =3D dma_handle & (PAGE_SIZE - 1); - unsigned int i, n_pages =3D PFN_UP(offset + size); + unsigned long offset =3D dma_handle & ~XEN_PAGE_MASK; + unsigned int i, n_pages =3D XEN_PFN_UP(offset + size); grant_ref_t grant; =20 if (WARN_ON(dir =3D=3D DMA_NONE)) --=20 2.25.1