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Fri, 29 Apr 2022 13:51:18 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 29 Apr 2022 13:51:18 +0000 (GMT) From: Niklas Schnelle To: Arnd Bergmann Cc: Greg Kroah-Hartman , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-pci@vger.kernel.org, Arnd Bergmann , Dave Airlie , Gerd Hoffmann , David Airlie , Daniel Vetter , virtualization@lists.linux-foundation.org (open list:DRM DRIVER FOR QXL VIRTUAL GPU), spice-devel@lists.freedesktop.org (open list:DRM DRIVER FOR QXL VIRTUAL GPU), dri-devel@lists.freedesktop.org (open list:DRM DRIVERS) Subject: [RFC v2 08/39] drm: handle HAS_IOPORT dependencies Date: Fri, 29 Apr 2022 15:50:13 +0200 Message-Id: <20220429135108.2781579-16-schnelle@linux.ibm.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220429135108.2781579-1-schnelle@linux.ibm.com> References: <20220429135108.2781579-1-schnelle@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: Z2_b3Ep6jzQYlZLubaqzG5wd29WjJfWI X-Proofpoint-ORIG-GUID: 2dZ9-j-Mnz9uF8ZFVdGA_r1MSqumR5yW X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.858,Hydra:6.0.486,FMLib:17.11.64.514 definitions=2022-04-29_06,2022-04-28_01,2022-02-23_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 phishscore=0 clxscore=1011 malwarescore=0 impostorscore=0 bulkscore=0 lowpriorityscore=0 priorityscore=1501 mlxscore=0 adultscore=0 spamscore=0 mlxlogscore=708 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2202240000 definitions=main-2204290078 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org In a future patch HAS_IOPORT=n will result in inb()/outb() and friends not being declared. We thus need to add HAS_IOPORT as dependency for those drivers using them. In the bochs driver there is optional MMIO support detected at runtime, warn if this isn't taken when HAS_IOPORT is not defined. There is also a direct and hard coded use in cirrus.c which according to the comment is only necessary during resume. Let's just skip this as for example s390 which doesn't have I/O port support also doesen't support suspend/resume. Co-developed-by: Arnd Bergmann Signed-off-by: Niklas Schnelle --- drivers/gpu/drm/qxl/Kconfig | 1 + drivers/gpu/drm/tiny/bochs.c | 19 +++++++++++++++++++ drivers/gpu/drm/tiny/cirrus.c | 2 ++ 3 files changed, 22 insertions(+) diff --git a/drivers/gpu/drm/qxl/Kconfig b/drivers/gpu/drm/qxl/Kconfig index ca3f51c2a8fe..d0e0d440c8d9 100644 --- a/drivers/gpu/drm/qxl/Kconfig +++ b/drivers/gpu/drm/qxl/Kconfig @@ -2,6 +2,7 @@ config DRM_QXL tristate "QXL virtual GPU" depends on DRM && PCI && MMU + depends on HAS_IOPORT select DRM_KMS_HELPER select DRM_TTM select DRM_TTM_HELPER diff --git a/drivers/gpu/drm/tiny/bochs.c b/drivers/gpu/drm/tiny/bochs.c index ed971c8bb446..9acc726d99ec 100644 --- a/drivers/gpu/drm/tiny/bochs.c +++ b/drivers/gpu/drm/tiny/bochs.c @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0-or-later +#include #include #include @@ -102,7 +103,11 @@ static void bochs_vga_writeb(struct bochs_device *bochs, u16 ioport, u8 val) writeb(val, bochs->mmio + offset); } else { +#ifdef HAS_IOPORT outb(val, ioport); +#else + WARN_ONCE(1, "Non-MMIO bochs device needs HAS_IOPORT"); +#endif } } @@ -116,7 +121,12 @@ static u8 bochs_vga_readb(struct bochs_device *bochs, u16 ioport) return readb(bochs->mmio + offset); } else { +#ifdef HAS_IOPORT return inb(ioport); +#else + WARN_ONCE(1, "Non-MMIO bochs device needs HAS_IOPORT"); + return 0xff; +#endif } } @@ -129,8 +139,13 @@ static u16 bochs_dispi_read(struct bochs_device *bochs, u16 reg) ret = readw(bochs->mmio + offset); } else { +#ifdef HAS_IOPORT outw(reg, VBE_DISPI_IOPORT_INDEX); ret = inw(VBE_DISPI_IOPORT_DATA); +#else + WARN_ONCE(1, "Non-MMIO bochs device needs HAS_IOPORT"); + ret = 0xffff; +#endif } return ret; } @@ -142,8 +157,12 @@ static void bochs_dispi_write(struct bochs_device *bochs, u16 reg, u16 val) writew(val, bochs->mmio + offset); } else { +#ifdef HAS_IOPORT outw(reg, VBE_DISPI_IOPORT_INDEX); outw(val, VBE_DISPI_IOPORT_DATA); +#else + WARN_ONCE(1, "Non-MMIO bochs device needs HAS_IOPORT"); +#endif } } diff --git a/drivers/gpu/drm/tiny/cirrus.c b/drivers/gpu/drm/tiny/cirrus.c index c8e791840862..0dc4788c5399 100644 --- a/drivers/gpu/drm/tiny/cirrus.c +++ b/drivers/gpu/drm/tiny/cirrus.c @@ -306,8 +306,10 @@ static int cirrus_mode_set(struct cirrus_device *cirrus, cirrus_set_start_address(cirrus, 0); +#ifdef CONFIG_HAS_IOPORT /* Unblank (needed on S3 resume, vgabios doesn't do it then) */ outb(0x20, 0x3c0); +#endif drm_dev_exit(idx); return 0;