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Wed, 10 Apr 2024 14:23:29 +0000 (GMT) From: Niklas Schnelle To: Helge Deller Cc: linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, Arnd Bergmann , Heiko Carstens , linux-kernel@vger.kernel.org, Niklas Schnelle Subject: [PATCH 1/1] video: Handle HAS_IOPORT dependencies Date: Wed, 10 Apr 2024 16:23:29 +0200 Message-Id: <20240410142329.3567824-2-schnelle@linux.ibm.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240410142329.3567824-1-schnelle@linux.ibm.com> References: <20240410142329.3567824-1-schnelle@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: C_Y5CG_tV7DK6EJeucQwwccLPVQr8k0k X-Proofpoint-ORIG-GUID: nK69QiT2I-XTpMn9zoeQpgEK4sWRpCA3 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-04-10_04,2024-04-09_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxscore=0 lowpriorityscore=0 phishscore=0 suspectscore=0 mlxlogscore=999 adultscore=0 impostorscore=0 bulkscore=0 malwarescore=0 clxscore=1015 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2404010000 definitions=main-2404100104 In a future patch HAS_IOPORT=n will disable inb()/outb() and friends at compile time. We thus need to #ifdef functions and their callsites which unconditionally use these I/O accessors. In the include/video/vga.h these are conveniently all those functions with the vga_io_* prefix. Co-developed-by: Arnd Bergmann Signed-off-by: Arnd Bergmann Signed-off-by: Niklas Schnelle --- Note: This patch does not depend any not-yet-mainline HAS_IOPORT changes and may be merged via subsystem specific trees at your earliest convenience. include/video/vga.h | 35 +++++++++++++++++++++++++---------- 1 file changed, 25 insertions(+), 10 deletions(-) diff --git a/include/video/vga.h b/include/video/vga.h index 947c0abd04ef..ed89295941c4 100644 --- a/include/video/vga.h +++ b/include/video/vga.h @@ -201,6 +201,7 @@ extern int restore_vga(struct vgastate *state); * generic VGA port read/write */ +#ifdef CONFIG_HAS_IOPORT static inline unsigned char vga_io_r (unsigned short port) { return inb_p(port); @@ -210,12 +211,12 @@ static inline void vga_io_w (unsigned short port, unsigned char val) { outb_p(val, port); } - static inline void vga_io_w_fast (unsigned short port, unsigned char reg, unsigned char val) { outw(VGA_OUT16VAL (val, reg), port); } +#endif /* CONFIG_HAS_IOPORT */ static inline unsigned char vga_mm_r (void __iomem *regbase, unsigned short port) { @@ -235,28 +236,34 @@ static inline void vga_mm_w_fast (void __iomem *regbase, unsigned short port, static inline unsigned char vga_r (void __iomem *regbase, unsigned short port) { - if (regbase) - return vga_mm_r (regbase, port); - else +#ifdef CONFIG_HAS_IOPORT + if (!regbase) return vga_io_r (port); + else +#endif /* CONFIG_HAS_IOPORT */ + return vga_mm_r (regbase, port); } static inline void vga_w (void __iomem *regbase, unsigned short port, unsigned char val) { - if (regbase) - vga_mm_w (regbase, port, val); - else +#ifdef CONFIG_HAS_IOPORT + if (!regbase) vga_io_w (port, val); + else +#endif /* CONFIG_HAS_IOPORT */ + vga_mm_w (regbase, port, val); } static inline void vga_w_fast (void __iomem *regbase, unsigned short port, unsigned char reg, unsigned char val) { - if (regbase) - vga_mm_w_fast (regbase, port, reg, val); - else +#ifdef CONFIG_HAS_IOPORT + if (!regbase) vga_io_w_fast (port, reg, val); + else +#endif /* CONFIG_HAS_IOPORT */ + vga_mm_w_fast (regbase, port, reg, val); } @@ -280,6 +287,7 @@ static inline void vga_wcrt (void __iomem *regbase, unsigned char reg, unsigned #endif /* VGA_OUTW_WRITE */ } +#ifdef CONFIG_HAS_IOPORT static inline unsigned char vga_io_rcrt (unsigned char reg) { vga_io_w (VGA_CRT_IC, reg); @@ -295,6 +303,7 @@ static inline void vga_io_wcrt (unsigned char reg, unsigned char val) vga_io_w (VGA_CRT_DC, val); #endif /* VGA_OUTW_WRITE */ } +#endif /* CONFIG_HAS_IOPORT */ static inline unsigned char vga_mm_rcrt (void __iomem *regbase, unsigned char reg) { @@ -333,6 +342,7 @@ static inline void vga_wseq (void __iomem *regbase, unsigned char reg, unsigned #endif /* VGA_OUTW_WRITE */ } +#ifdef CONFIG_HAS_IOPORT static inline unsigned char vga_io_rseq (unsigned char reg) { vga_io_w (VGA_SEQ_I, reg); @@ -348,6 +358,7 @@ static inline void vga_io_wseq (unsigned char reg, unsigned char val) vga_io_w (VGA_SEQ_D, val); #endif /* VGA_OUTW_WRITE */ } +#endif /* CONFIG_HAS_IOPORT */ static inline unsigned char vga_mm_rseq (void __iomem *regbase, unsigned char reg) { @@ -385,6 +396,7 @@ static inline void vga_wgfx (void __iomem *regbase, unsigned char reg, unsigned #endif /* VGA_OUTW_WRITE */ } +#ifdef CONFIG_HAS_IOPORT static inline unsigned char vga_io_rgfx (unsigned char reg) { vga_io_w (VGA_GFX_I, reg); @@ -400,6 +412,7 @@ static inline void vga_io_wgfx (unsigned char reg, unsigned char val) vga_io_w (VGA_GFX_D, val); #endif /* VGA_OUTW_WRITE */ } +#endif /* CONFIG_HAS_IOPORT */ static inline unsigned char vga_mm_rgfx (void __iomem *regbase, unsigned char reg) { @@ -434,6 +447,7 @@ static inline void vga_wattr (void __iomem *regbase, unsigned char reg, unsigned vga_w (regbase, VGA_ATT_W, val); } +#ifdef CONFIG_HAS_IOPORT static inline unsigned char vga_io_rattr (unsigned char reg) { vga_io_w (VGA_ATT_IW, reg); @@ -445,6 +459,7 @@ static inline void vga_io_wattr (unsigned char reg, unsigned char val) vga_io_w (VGA_ATT_IW, reg); vga_io_w (VGA_ATT_W, val); } +#endif /* CONFIG_HAS_IOPORT */ static inline unsigned char vga_mm_rattr (void __iomem *regbase, unsigned char reg) {