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Tue, 22 Oct 2019 06:13:05 +0000 From: "james qian wang (Arm Technology China)" To: Rob Herring Subject: Re: [PATCH 4/6] drm/cma-helper: Support DRM_MODE_DUMB_KERNEL_MAP flag Thread-Topic: [PATCH 4/6] drm/cma-helper: Support DRM_MODE_DUMB_KERNEL_MAP flag Thread-Index: AQHViFjvrI6TSZ8K9kmI2e7gEmpbY6dmLsqA Date: Tue, 22 Oct 2019 06:13:05 +0000 Message-ID: <20191022061255.GA7512@jamwan02-TSP300> References: <20191021214550.1461-1-robh@kernel.org> <20191021214550.1461-5-robh@kernel.org> In-Reply-To: <20191021214550.1461-5-robh@kernel.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Mutt/1.10.1 (2018-07-13) x-originating-ip: [113.29.88.7] x-clientproxiedby: HK2PR0401CA0004.apcprd04.prod.outlook.com (2603:1096:202:2::14) To VE1PR08MB5006.eurprd08.prod.outlook.com (2603:10a6:803:113::31) Authentication-Results-Original: spf=none (sender IP is ) smtp.mailfrom=james.qian.wang@arm.com; x-ms-exchange-messagesentrepresentingtype: 1 x-ms-publictraffictype: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: 20533afa-c2be-4063-1d58-08d756b6edaa X-MS-TrafficTypeDiagnostic: VE1PR08MB5215:|VE1PR08MB5215:|VI1PR08MB2639: x-ms-exchange-transport-forked: True X-Microsoft-Antispam-PRVS: x-checkrecipientrouted: true x-ms-oob-tlc-oobclassifiers: OLM:52;OLM:52; 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Ip=[63.35.35.123]; Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR08MB2639 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191021_231328_754794_9826FC5B X-CRM114-Status: GOOD ( 15.15 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?iso-8859-1?Q?Heiko_St=FCbner?= , Neil Armstrong , David Airlie , Liviu Dudau , "dri-devel@lists.freedesktop.org" , Sandy Huang , Laurent Pinchart , Benjamin Gaignard , "linux-amlogic@lists.infradead.org" , "linux-stm32@st-md-mailman.stormreply.com" , Yannick Fertre , Kevin Hilman , Xinwei Kong , Xinliang Liu , "linux-rockchip@lists.infradead.org" , Chen-Yu Tsai , =?iso-8859-1?Q?Noralf_Tr=F8nnes?= , CK Hu , Philipp Zabel , Alexandre Torgue , Chen Feng , Maarten Lankhorst , "linux-renesas-soc@vger.kernel.org" , Maxime Ripard , "linux-mediatek@lists.infradead.org" , Matthias Brugger , Daniel Vetter , nd , Sean Paul , "linux-arm-kernel@lists.infradead.org" , Philippe Cornu , Vincent Abriou , Kieran Bingham , Maxime Coquelin , Rongrong Zou , Brian Starkey Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Oct 21, 2019 at 04:45:48PM -0500, Rob Herring wrote: > Add support in CMA helpers to handle callers specifying > DRM_MODE_DUMB_KERNEL_MAP flag. Existing behavior is maintained with this > change. drm_gem_cma_dumb_create() always creates a kernel mapping as > before. drm_gem_cma_dumb_create_internal() lets the caller set the flags > as desired. Therefore, update all the existing callers of > drm_gem_cma_dumb_create_internal() to also set the > DRM_MODE_DUMB_KERNEL_MAP flag. > = > Cc: Maarten Lankhorst > Cc: Maxime Ripard > Cc: Sean Paul > Cc: David Airlie > Cc: Daniel Vetter > Cc: "James (Qian) Wang" > Cc: Liviu Dudau > Cc: Brian Starkey > Cc: Neil Armstrong > Cc: Kevin Hilman > Cc: Laurent Pinchart > Cc: Kieran Bingham > Cc: Sandy Huang > Cc: "Heiko St=FCbner" > Cc: Yannick Fertre > Cc: Philippe Cornu > Cc: Benjamin Gaignard > Cc: Vincent Abriou > Cc: Maxime Coquelin > Cc: Alexandre Torgue > Cc: Chen-Yu Tsai > Cc: linux-amlogic@lists.infradead.org > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-renesas-soc@vger.kernel.org > Cc: linux-rockchip@lists.infradead.org > Cc: linux-stm32@st-md-mailman.stormreply.com > Signed-off-by: Rob Herring > --- > .../gpu/drm/arm/display/komeda/komeda_kms.c | 1 + > drivers/gpu/drm/arm/malidp_drv.c | 1 + > drivers/gpu/drm/drm_gem_cma_helper.c | 48 +++++++++++-------- > drivers/gpu/drm/meson/meson_drv.c | 1 + > drivers/gpu/drm/rcar-du/rcar_du_kms.c | 1 + > drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 1 + > drivers/gpu/drm/stm/drv.c | 1 + > drivers/gpu/drm/sun4i/sun4i_drv.c | 1 + > 8 files changed, 36 insertions(+), 19 deletions(-) > = > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c b/drivers/gp= u/drm/arm/display/komeda/komeda_kms.c > index d49772de93e0..7cf0dc4cbfc1 100644 > --- a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c > @@ -31,6 +31,7 @@ static int komeda_gem_cma_dumb_create(struct drm_file *= file, > u32 pitch =3D DIV_ROUND_UP(args->width * args->bpp, 8); > = > args->pitch =3D ALIGN(pitch, mdev->chip.bus_width); > + args->flags =3D DRM_MODE_DUMB_KERNEL_MAP; > Hi Rob: komeda doesn't need the kernel map either, so you can del this line for kom= eda. and with this. Reviewed-by: James Qian Wang (Arm Technology China) > return drm_gem_cma_dumb_create_internal(file, dev, args); > } > diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malid= p_drv.c > index 8a76315aaa0f..aeb1a779ecc1 100644 > --- a/drivers/gpu/drm/arm/malidp_drv.c > +++ b/drivers/gpu/drm/arm/malidp_drv.c > @@ -465,6 +465,7 @@ static int malidp_dumb_create(struct drm_file *file_p= riv, > u8 alignment =3D malidp_hw_get_pitch_align(malidp->dev, 1); > = > args->pitch =3D ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), alignme= nt); > + args->flags =3D DRM_MODE_DUMB_KERNEL_MAP; > = > return drm_gem_cma_dumb_create_internal(file_priv, drm, args); > } > diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c b/drivers/gpu/drm/drm_g= em_cma_helper.c > index 4cebfe01e6ea..f91e9e8adeaf 100644 > --- a/drivers/gpu/drm/drm_gem_cma_helper.c > +++ b/drivers/gpu/drm/drm_gem_cma_helper.c > @@ -78,21 +78,8 @@ __drm_gem_cma_create(struct drm_device *drm, size_t si= ze) > return ERR_PTR(ret); > } > = > -/** > - * drm_gem_cma_create - allocate an object with the given size > - * @drm: DRM device > - * @size: size of the object to allocate > - * > - * This function creates a CMA GEM object and allocates a contiguous chu= nk of > - * memory as backing store. The backing memory has the writecombine attr= ibute > - * set. > - * > - * Returns: > - * A struct drm_gem_cma_object * on success or an ERR_PTR()-encoded nega= tive > - * error code on failure. > - */ > -struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm, > - size_t size) > +static struct drm_gem_cma_object * > +drm_gem_cma_create_flags(struct drm_device *drm, size_t size, u32 flags) > { > struct drm_gem_cma_object *cma_obj; > int ret; > @@ -103,6 +90,9 @@ struct drm_gem_cma_object *drm_gem_cma_create(struct d= rm_device *drm, > if (IS_ERR(cma_obj)) > return cma_obj; > = > + if (!(flags & DRM_MODE_DUMB_KERNEL_MAP)) > + cma_obj->dma_attrs |=3D DMA_ATTR_NO_KERNEL_MAPPING; > + > cma_obj->vaddr =3D dma_alloc_attrs(drm->dev, size, &cma_obj->paddr, > GFP_KERNEL | __GFP_NOWARN, > cma_obj->dma_attrs); > @@ -119,6 +109,25 @@ struct drm_gem_cma_object *drm_gem_cma_create(struct= drm_device *drm, > drm_gem_object_put_unlocked(&cma_obj->base); > return ERR_PTR(ret); > } > + > +/** > + * drm_gem_cma_create - allocate an object with the given size > + * @drm: DRM device > + * @size: size of the object to allocate > + * > + * This function creates a CMA GEM object and allocates a contiguous chu= nk of > + * memory as backing store. The backing memory has the writecombine attr= ibute > + * set. > + * > + * Returns: > + * A struct drm_gem_cma_object * on success or an ERR_PTR()-encoded nega= tive > + * error code on failure. > + */ > +struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm, > + size_t size) > +{ > + return drm_gem_cma_create_flags(drm, size, DRM_MODE_DUMB_KERNEL_MAP); > +} > EXPORT_SYMBOL_GPL(drm_gem_cma_create); > = > /** > @@ -139,14 +148,14 @@ EXPORT_SYMBOL_GPL(drm_gem_cma_create); > */ > static struct drm_gem_cma_object * > drm_gem_cma_create_with_handle(struct drm_file *file_priv, > - struct drm_device *drm, size_t size, > + struct drm_device *drm, size_t size, u32 flags, > uint32_t *handle) > { > struct drm_gem_cma_object *cma_obj; > struct drm_gem_object *gem_obj; > int ret; > = > - cma_obj =3D drm_gem_cma_create(drm, size); > + cma_obj =3D drm_gem_cma_create_flags(drm, size, flags); > if (IS_ERR(cma_obj)) > return cma_obj; > = > @@ -225,7 +234,7 @@ int drm_gem_cma_dumb_create_internal(struct drm_file = *file_priv, > args->size =3D args->pitch * args->height; > = > cma_obj =3D drm_gem_cma_create_with_handle(file_priv, drm, args->size, > - &args->handle); > + args->flags, &args->handle); > return PTR_ERR_OR_ZERO(cma_obj); > } > EXPORT_SYMBOL_GPL(drm_gem_cma_dumb_create_internal); > @@ -256,9 +265,10 @@ int drm_gem_cma_dumb_create(struct drm_file *file_pr= iv, > = > args->pitch =3D DIV_ROUND_UP(args->width * args->bpp, 8); > args->size =3D args->pitch * args->height; > + args->flags =3D DRM_MODE_DUMB_KERNEL_MAP; > = > cma_obj =3D drm_gem_cma_create_with_handle(file_priv, drm, args->size, > - &args->handle); > + args->flags, &args->handle); > return PTR_ERR_OR_ZERO(cma_obj); > } > EXPORT_SYMBOL_GPL(drm_gem_cma_dumb_create); > diff --git a/drivers/gpu/drm/meson/meson_drv.c b/drivers/gpu/drm/meson/me= son_drv.c > index 397c33182f4f..1593518dcbe4 100644 > --- a/drivers/gpu/drm/meson/meson_drv.c > +++ b/drivers/gpu/drm/meson/meson_drv.c > @@ -81,6 +81,7 @@ static int meson_dumb_create(struct drm_file *file, str= uct drm_device *dev, > */ > args->pitch =3D ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), SZ_64); > args->size =3D PAGE_ALIGN(args->pitch * args->height); > + args->flags =3D DRM_MODE_DUMB_KERNEL_MAP; > = > return drm_gem_cma_dumb_create_internal(file, dev, args); > } > diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar= -du/rcar_du_kms.c > index 2dc9caee8767..c9b1f298ce7e 100644 > --- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c > +++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c > @@ -299,6 +299,7 @@ int rcar_du_dumb_create(struct drm_file *file, struct= drm_device *dev, > align =3D 16 * args->bpp / 8; > = > args->pitch =3D roundup(min_pitch, align); > + args->flags =3D DRM_MODE_DUMB_KERNEL_MAP; > = > return drm_gem_cma_dumb_create_internal(file, dev, args); > } > diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/dr= m/rockchip/rockchip_drm_gem.c > index 7582d0e6a60a..f09b9a035376 100644 > --- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c > +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c > @@ -419,6 +419,7 @@ int rockchip_gem_dumb_create(struct drm_file *file_pr= iv, > * align to 64 bytes since Mali requires it. > */ > args->pitch =3D ALIGN(min_pitch, 64); > + args->flags =3D DRM_MODE_DUMB_KERNEL_MAP; > args->size =3D args->pitch * args->height; > = > rk_obj =3D rockchip_gem_create_with_handle(file_priv, dev, args->size, > diff --git a/drivers/gpu/drm/stm/drv.c b/drivers/gpu/drm/stm/drv.c > index 5a9f9aca8bc2..0f76a4ac95b3 100644 > --- a/drivers/gpu/drm/stm/drv.c > +++ b/drivers/gpu/drm/stm/drv.c > @@ -47,6 +47,7 @@ static int stm_gem_cma_dumb_create(struct drm_file *fil= e, > */ > args->pitch =3D roundup(min_pitch, 128); > args->height =3D roundup(args->height, 4); > + args->flags =3D DRM_MODE_DUMB_KERNEL_MAP; > = > return drm_gem_cma_dumb_create_internal(file, dev, args); > } > diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/su= n4i_drv.c > index a5757b11b730..f653a5d1e2d6 100644 > --- a/drivers/gpu/drm/sun4i/sun4i_drv.c > +++ b/drivers/gpu/drm/sun4i/sun4i_drv.c > @@ -34,6 +34,7 @@ static int drm_sun4i_gem_dumb_create(struct drm_file *f= ile_priv, > { > /* The hardware only allows even pitches for YUV buffers. */ > args->pitch =3D ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), 2); > + args->flags =3D DRM_MODE_DUMB_KERNEL_MAP; > = > return drm_gem_cma_dumb_create_internal(file_priv, drm, args); > } > -- = > 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel