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Fri, 05 Apr 2024 15:29:30 +0000 Received: from smtpav07.fra02v.mail.ibm.com (smtpav07.fra02v.mail.ibm.com [10.20.54.106]) by smtprelay04.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 435FTO0K3735920 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 5 Apr 2024 15:29:26 GMT Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BF9E320071; Fri, 5 Apr 2024 15:29:24 +0000 (GMT) Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 97C6E2006E; Fri, 5 Apr 2024 15:29:24 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 5 Apr 2024 15:29:24 +0000 (GMT) From: Niklas Schnelle To: Greg Kroah-Hartman , Jiri Slaby , =?utf-8?q?Ilpo_J=C3=A4rvinen?= Cc: linux-serial@vger.kernel.org, Arnd Bergmann , Heiko Carstens , linux-kernel@vger.kernel.org, Niklas Schnelle Subject: [PATCH 1/1] tty: serial: handle HAS_IOPORT dependencies Date: Fri, 5 Apr 2024 17:29:24 +0200 Message-Id: <20240405152924.252598-2-schnelle@linux.ibm.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240405152924.252598-1-schnelle@linux.ibm.com> References: <20240405152924.252598-1-schnelle@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-GUID: X0T8dfEzTbnk5qGofqdhM2G4MNJPPapu X-Proofpoint-ORIG-GUID: X0T8dfEzTbnk5qGofqdhM2G4MNJPPapu X-Proofpoint-UnRewURL: 0 URL was un-rewritten Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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=2024-04-05_16,2024-04-05_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 adultscore=0 spamscore=0 lowpriorityscore=0 bulkscore=0 priorityscore=1501 mlxscore=0 malwarescore=0 clxscore=1015 phishscore=0 mlxlogscore=999 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2404010000 definitions=main-2404050111 In a future patch HAS_IOPORT=n will disable inb()/outb() and friends at compile time. We thus need to add HAS_IOPORT as dependency for those drivers using them unconditionally. For 8250 based drivers some support MMIO only use so fence only the parts requiring I/O ports. Co-developed-by: Arnd Bergmann Signed-off-by: Arnd Bergmann Signed-off-by: Niklas Schnelle Acked-by: Arnd Bergmann --- 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. Note 2: This was previously acked here: https://lore.kernel.org/all/2023053050-prodigal-shine-4d1c@gregkh/ Given this was almost a year ago and didn't apply then I didn't carry the Ack over though. drivers/tty/Kconfig | 4 +-- drivers/tty/serial/8250/8250_early.c | 4 +++ drivers/tty/serial/8250/8250_pci.c | 14 ++++++++++ drivers/tty/serial/8250/8250_port.c | 42 +++++++++++++++++++++++----- drivers/tty/serial/8250/Kconfig | 7 ++--- drivers/tty/serial/Kconfig | 2 +- 6 files changed, 59 insertions(+), 14 deletions(-) diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig index a45d423ad10f..63a494d36a1f 100644 --- a/drivers/tty/Kconfig +++ b/drivers/tty/Kconfig @@ -220,7 +220,7 @@ config MOXA_INTELLIO config MOXA_SMARTIO tristate "Moxa SmartIO support v. 2.0" - depends on SERIAL_NONSTANDARD && PCI + depends on SERIAL_NONSTANDARD && PCI && HAS_IOPORT help Say Y here if you have a Moxa SmartIO multiport serial card and/or want to help develop a new version of this driver. @@ -302,7 +302,7 @@ config GOLDFISH_TTY_EARLY_CONSOLE config IPWIRELESS tristate "IPWireless 3G UMTS PCMCIA card support" - depends on PCMCIA && NETDEVICES + depends on PCMCIA && NETDEVICES && HAS_IOPORT select PPP help This is a driver for 3G UMTS PCMCIA card from IPWireless company. In diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c index e3f482fd3de4..8f9aec2e7c7d 100644 --- a/drivers/tty/serial/8250/8250_early.c +++ b/drivers/tty/serial/8250/8250_early.c @@ -46,8 +46,10 @@ static unsigned int serial8250_early_in(struct uart_port *port, int offset) return readl(port->membase + offset); case UPIO_MEM32BE: return ioread32be(port->membase + offset); +#ifdef CONFIG_HAS_IOPORT case UPIO_PORT: return inb(port->iobase + offset); +#endif default: return 0; } @@ -70,9 +72,11 @@ static void serial8250_early_out(struct uart_port *port, int offset, int value) case UPIO_MEM32BE: iowrite32be(value, port->membase + offset); break; +#ifdef CONFIG_HAS_IOPORT case UPIO_PORT: outb(value, port->iobase + offset); break; +#endif } } diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index 0d35c77fad9e..38ac5236d2ea 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -928,6 +928,7 @@ static int pci_netmos_init(struct pci_dev *dev) return num_serial; } +#ifdef CONFIG_HAS_IOPORT /* * These chips are available with optionally one parallel port and up to * two serial ports. Unfortunately they all have the same product id. @@ -1054,6 +1055,7 @@ static void pci_ite887x_exit(struct pci_dev *dev) ioport &= 0xffff; release_region(ioport, ITE_887x_IOSIZE); } +#endif /* CONFIG_HAS_IOPORT */ /* * Oxford Semiconductor Inc. @@ -1328,6 +1330,7 @@ static int pci_oxsemi_tornado_setup(struct serial_private *priv, #define QOPR_CLOCK_X8 0x0003 #define QOPR_CLOCK_RATE_MASK 0x0003 +#ifdef CONFIG_HAS_IOPORT /* Quatech devices have their own extra interface features */ static struct pci_device_id quatech_cards[] = { { PCI_DEVICE_DATA(QUATECH, QSC100, 1) }, @@ -1547,6 +1550,7 @@ static int pci_quatech_setup(struct serial_private *priv, pci_warn(priv->dev, "software control of RS422 features not currently supported.\n"); return pci_default_setup(priv, board, port, idx); } +#endif /* CONFIG_HAS_IOPORT */ static int pci_default_setup(struct serial_private *priv, const struct pciserial_board *board, @@ -1826,6 +1830,7 @@ static int skip_tx_en_setup(struct serial_private *priv, return pci_default_setup(priv, board, port, idx); } +#ifdef CONFIG_HAS_IOPORT static void kt_handle_break(struct uart_port *p) { struct uart_8250_port *up = up_to_u8250p(p); @@ -1869,6 +1874,7 @@ static int kt_serial_setup(struct serial_private *priv, port->port.handle_break = kt_handle_break; return skip_tx_en_setup(priv, board, port, idx); } +#endif /* CONFIG_HAS_IOPORT */ static int pci_eg20t_init(struct pci_dev *dev) { @@ -1913,6 +1919,7 @@ pci_wch_ch38x_setup(struct serial_private *priv, #define CH384_XINT_ENABLE_REG 0xEB #define CH384_XINT_ENABLE_BIT 0x02 +#ifdef CONFIG_HAS_IOPORT static int pci_wch_ch38x_init(struct pci_dev *dev) { int max_port; @@ -1940,6 +1947,7 @@ static void pci_wch_ch38x_exit(struct pci_dev *dev) iobase = pci_resource_start(dev, 0); outb(0x0, iobase + CH384_XINT_ENABLE_REG); } +#endif /* CONFIG_HAS_IOPORT */ static int @@ -2171,6 +2179,7 @@ static struct pci_serial_quirk pci_serial_quirks[] = { .subdevice = PCI_ANY_ID, .setup = ce4100_serial_setup, }, +#ifdef CONFIG_HAS_IOPORT { .vendor = PCI_VENDOR_ID_INTEL, .device = PCI_DEVICE_ID_INTEL_PATSBURG_KT, @@ -2190,6 +2199,7 @@ static struct pci_serial_quirk pci_serial_quirks[] = { .setup = pci_default_setup, .exit = pci_ite887x_exit, }, +#endif /* * National Instruments */ @@ -2311,6 +2321,7 @@ static struct pci_serial_quirk pci_serial_quirks[] = { .exit = pci_ni8430_exit, }, /* Quatech */ +#ifdef CONFIG_HAS_IOPORT { .vendor = PCI_VENDOR_ID_QUATECH, .device = PCI_ANY_ID, @@ -2319,6 +2330,7 @@ static struct pci_serial_quirk pci_serial_quirks[] = { .init = pci_quatech_init, .setup = pci_quatech_setup, }, +#endif /* * Panacom */ @@ -2836,6 +2848,7 @@ static struct pci_serial_quirk pci_serial_quirks[] = { .subdevice = PCI_ANY_ID, .setup = pci_wch_ch38x_setup, }, +#ifdef CONFIG_HAS_IOPORT /* WCH CH384 8S card (16850 clone) */ { .vendor = PCIE_VENDOR_ID_WCH, @@ -2846,6 +2859,7 @@ static struct pci_serial_quirk pci_serial_quirks[] = { .exit = pci_wch_ch38x_exit, .setup = pci_wch_ch38x_setup, }, +#endif /* * Broadcom TruManage (NetXtreme) */ diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index fc9dd5d45295..1c5e39c1a469 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -338,6 +338,7 @@ static void default_serial_dl_write(struct uart_8250_port *up, u32 value) serial_out(up, UART_DLM, value >> 8 & 0xff); } +#ifdef CONFIG_HAS_IOPORT static unsigned int hub6_serial_in(struct uart_port *p, int offset) { offset = offset << p->regshift; @@ -351,6 +352,7 @@ static void hub6_serial_out(struct uart_port *p, int offset, int value) outb(p->hub6 - 1 + offset, p->iobase); outb(value, p->iobase + 1); } +#endif /* CONFIG_HAS_IOPORT */ static unsigned int mem_serial_in(struct uart_port *p, int offset) { @@ -400,6 +402,7 @@ static unsigned int mem32be_serial_in(struct uart_port *p, int offset) return ioread32be(p->membase + offset); } +#ifdef CONFIG_HAS_IOPORT static unsigned int io_serial_in(struct uart_port *p, int offset) { offset = offset << p->regshift; @@ -411,6 +414,24 @@ static void io_serial_out(struct uart_port *p, int offset, int value) offset = offset << p->regshift; outb(value, p->iobase + offset); } +#endif +static unsigned int no_serial_in(struct uart_port *p, int offset) +{ + return (unsigned int)-1; +} + +static void no_serial_out(struct uart_port *p, int offset, int value) +{ +} + +#ifdef CONFIG_HAS_IOPORT +static inline bool is_upf_fourport(struct uart_port *port) +{ + return port->flags & UPF_FOURPORT; +} +#else +#define is_upf_fourport(x) false +#endif static int serial8250_default_handle_irq(struct uart_port *port); @@ -422,10 +443,12 @@ static void set_io_from_upio(struct uart_port *p) up->dl_write = default_serial_dl_write; switch (p->iotype) { +#ifdef CONFIG_HAS_IOPORT case UPIO_HUB6: p->serial_in = hub6_serial_in; p->serial_out = hub6_serial_out; break; +#endif case UPIO_MEM: p->serial_in = mem_serial_in; @@ -446,11 +469,16 @@ static void set_io_from_upio(struct uart_port *p) p->serial_in = mem32be_serial_in; p->serial_out = mem32be_serial_out; break; - - default: +#ifdef CONFIG_HAS_IOPORT + case UPIO_PORT: p->serial_in = io_serial_in; p->serial_out = io_serial_out; break; +#endif + default: + WARN(1, "Unsupported UART type %x\n", p->iotype); + p->serial_in = no_serial_in; + p->serial_out = no_serial_out; } /* Remember loaded iotype */ up->cur_iotype = p->iotype; @@ -1318,7 +1346,7 @@ static void autoconfig_irq(struct uart_8250_port *up) unsigned long irqs; int irq; - if (port->flags & UPF_FOURPORT) { + if (is_upf_fourport(port)) { ICP = (port->iobase & 0xfe0) | 0x1f; save_ICP = inb_p(ICP); outb_p(0x80, ICP); @@ -1337,7 +1365,7 @@ static void autoconfig_irq(struct uart_8250_port *up) irqs = probe_irq_on(); serial8250_out_MCR(up, 0); udelay(10); - if (port->flags & UPF_FOURPORT) { + if (is_upf_fourport(port)) { serial8250_out_MCR(up, UART_MCR_DTR | UART_MCR_RTS); } else { serial8250_out_MCR(up, @@ -1361,7 +1389,7 @@ static void autoconfig_irq(struct uart_8250_port *up) serial_out(up, UART_IER, save_ier); uart_port_unlock_irq(port); - if (port->flags & UPF_FOURPORT) + if (is_upf_fourport(port)) outb_p(save_ICP, ICP); port->irq = (irq > 0) ? irq : 0; @@ -2438,7 +2466,7 @@ int serial8250_do_startup(struct uart_port *port) */ up->ier = UART_IER_RLSI | UART_IER_RDI; - if (port->flags & UPF_FOURPORT) { + if (is_upf_fourport(port)) { unsigned int icp; /* * Enable interrupts on the AST Fourport board @@ -2483,7 +2511,7 @@ void serial8250_do_shutdown(struct uart_port *port) serial8250_release_dma(up); uart_port_lock_irqsave(port, &flags); - if (port->flags & UPF_FOURPORT) { + if (is_upf_fourport(port)) { /* reset interrupts on the AST Fourport board */ inb((port->iobase & 0xfe0) | 0x1f); port->mctrl |= TIOCM_OUT1; diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index 47ff50763c04..54bf98869abf 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -6,7 +6,6 @@ config SERIAL_8250 tristate "8250/16550 and compatible serial support" - depends on !S390 select SERIAL_CORE select SERIAL_MCTRL_GPIO if GPIOLIB help @@ -72,7 +71,7 @@ config SERIAL_8250_16550A_VARIANTS config SERIAL_8250_FINTEK bool "Support for Fintek variants" - depends on SERIAL_8250 + depends on SERIAL_8250 && HAS_IOPORT help Selecting this option will add support for the RS232 and RS485 capabilities of the Fintek F81216A LPC to 4 UART as well similar @@ -136,7 +135,7 @@ config SERIAL_8250_PCILIB config SERIAL_8250_PCI tristate "8250/16550 PCI device support" - depends on SERIAL_8250 && PCI + depends on SERIAL_8250 && PCI && HAS_IOPORT select SERIAL_8250_PCILIB default SERIAL_8250 help @@ -163,7 +162,7 @@ config SERIAL_8250_HP300 config SERIAL_8250_CS tristate "8250/16550 PCMCIA device support" - depends on PCMCIA && SERIAL_8250 + depends on PCMCIA && SERIAL_8250 && HAS_IOPORT help Say Y here to enable support for 16-bit PCMCIA serial devices, including serial port cards, modems, and the modem functions of diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index ffcf4882b25f..92c85e805c2a 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -874,7 +874,7 @@ config SERIAL_TXX9_STDSERIAL config SERIAL_JSM tristate "Digi International NEO and Classic PCI Support" - depends on PCI + depends on PCI && HAS_IOPORT select SERIAL_CORE help This is a driver for Digi International's Neo and Classic series