- 03 Nov, 2022 40 commits
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Reviewed-by:
Baolin Wang <baolin.wang@linux.alibaba.com> Signed-off-by:
Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://lore.kernel.org/r/20221019091151.6692-34-ilpo.jarvinen@linux.intel.comSigned-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Reviewed-by:
Thierry Reding <treding@nvidia.com> Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Reviewed-by:
Sam Protsenko <semen.protsenko@linaro.org> Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Reviewed-by:
Pali Rohár <pali@kernel.org> Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Acked-by:
Martin Blumenstingl <martin.blumenstingl@googlemail.com> Acked-by:
Neil Armstrong <neil.armstrong@linaro.org> Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Reviewed-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Acked-by:
Gabriel Somlo <gsomlo@gmail.com> Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Reviewed-by:
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Acked-by:
Baruch Siach <baruch@tkos.co.il> Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Reviewed-by:
Claudiu Beznea <claudiu.beznea@microchip.com> Acked-By:
Richard GENOUD <richard.genoud@gmail.com> Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Reviewed-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Reviewed-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Reviewed-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Ilpo Järvinen authored
Take advantage of the new uart_xmit_advance() helper. Signed-off-by:
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Lukas Wunner authored
Recent TI Sitara SoCs such as AM64/AM65 have gained the ability to automatically assert RTS when data is transmitted, obviating the need to emulate this functionality in software. The feature is controlled through new DIR_EN and DIR_POL bits in the Mode Definition Register 3. For details see page 8783 and 8890 of the AM65 TRM: https://www.ti.com/lit/ug/spruid7e/spruid7e.pdf Cc: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Cc: Su Bao Cheng <baocheng.su@siemens.com> Cc: Vignesh Raghavendra <vigneshr@ti.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Bin Liu <b-liu@ti.com> Tested-by:
Zeng Chao <chao.zeng@siemens.com> Reviewed-by:
Lukas Wunner <lukas@wunner.de> Link: https://lore.kernel.org/r/e9f25f5c9200a35d3162973c2b45d6b892cc9bf2.1665906869.git.lukas@wunner.deSigned-off-by:
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Aniket Randive authored
Added changes to support the hibernation feature for serial UART. Added support for freeze, restore and thaw callbacks to put the device into hibernation. Signed-off-by:
Aniket Randive <quic_arandive@quicinc.com> Link: https://lore.kernel.org/r/1665123780-20557-1-git-send-email-quic_arandive@quicinc.comSigned-off-by:
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Jiri Slaby (SUSE) authored
uart_port_tx_limited() is a new helper to send characters to the device. Use it in these drivers. mux.c also needs to define tx_done(). But I'm not sure if the driver really wants to wait for all the characters to dismiss from the HW fifo at this code point. Hence I marked this as FIXME. Cc: Russell King <linux@armlinux.org.uk> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: bcm-kernel-feedback-list@broadcom.com Cc: "Pali Rohár" <pali@kernel.org> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Orson Zhai <orsonzhai@gmail.com> Cc: Baolin Wang <baolin.wang7@gmail.com> Cc: Chunyan Zhang <zhang.lyra@gmail.com> Cc: Patrice Chotard <patrice.chotard@foss.st.com> Cc: linux-riscv@lists.infradead.org Reviewed-by:
Jiri Slaby (SUSE) <jirislaby@kernel.org> Link: https://lore.kernel.org/r/20221004104927.14361-4-jirislaby@kernel.orgSigned-off-by:
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Jiri Slaby (SUSE) authored
uart_port_tx() is a new helper to send characters to the device. Use it in these drivers. Cc: Tobias Klauser <tklauser@distanz.ch> Cc: Richard Genoud <richard.genoud@gmail.com> Cc: Nicolas Ferre <nicolas.ferre@microchip.com> Cc: Alexandre Belloni <alexandre.belloni@bootlin.com> Cc: Claudiu Beznea <claudiu.beznea@microchip.com> Cc: Vladimir Zapolskiy <vz@mleia.com> Cc: Liviu Dudau <liviu.dudau@arm.com> Cc: Sudeep Holla <sudeep.holla@arm.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Pengutronix Kernel Team <kernel@pengutronix.de> Cc: Fabio Estevam <festevam@gmail.com> Cc: NXP Linux Team <linux-imx@nxp.com> Cc: "Andreas Färber" <afaerber@suse.de> Cc: Manivannan Sadhasivam <mani@kernel.org> Reviewed-by:
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Jiri Slaby (SUSE) authored
Many serial drivers do the same thing: * send x_char if set * keep sending from the xmit circular buffer until either - the loop reaches the end of the xmit buffer - TX is stopped - HW fifo is full * check for pending characters and: - wake up tty writers to fill for more data into xmit buffer - stop TX if there is nothing in the xmit buffer The only differences are: * how to write the character to the HW fifo * the check of the end condition: - is the HW fifo full? - is limit of the written characters reached? So unify the above into two helpers: * uart_port_tx_limited() -- it performs the above taking the written characters limit into account, and * uart_port_tx() -- the same as above, except it only checks the HW readiness, not the characters limit. The HW specific operations (as stated as "differences" above) are passed as arguments to the macros. They are: * tx_ready -- returns true if HW can accept more data. * put_char -- write a character to the device. * tx_done -- when the write loop is done, perform arbitrary action before potential invocation of ops->stop_tx() happens. Note that the above are macros. This means the code is generated in place and the above 3 arguments are "inlined". I.e. no added penalty by generating call instructions for every single character. Nor any indirect calls. (As in some previous versions of this patchset.) Reviewed-by:
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Kees Cook authored
TIOCSTI continues its long history of being used in privilege escalation attacks[1]. Prior attempts to provide a mechanism to disable this have devolved into discussions around creating full-blown LSMs to provide arbitrary ioctl filtering, which is hugely over-engineered -- only TIOCSTI is being used this way. 3 years ago OpenBSD entirely removed TIOCSTI[2], Android has had it filtered for longer[3], and the tools that had historically used TIOCSTI either do not need it, are not commonly built with it, or have had its use removed. Provide a simple CONFIG and global sysctl to disable this for the system builders who have wanted this functionality for literally decades now, much like the ldisc_autoload CONFIG and sysctl. [1] https://lore.kernel.org/linux-hardening/Y0m9l52AKmw6Yxi1@hostpad [2] https://undeadly.org/cgi?action=article;sid=20170701132619 [3] https://lore.kernel.org/lkml/CAFJ0LnFGRuEEn1tCLhoki8ZyWrKfktbF+rwwN7WzyC_kBFoQVA@mail.gmail.com/ Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <jirislaby@kernel.org> Cc: Simon Brand <simon.brand@postadigitale.de> Signed-off-by:
Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20221022182949.2684794-2-keescook@chromium.orgSigned-off-by:
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Kees Cook authored
In preparation for adding another sysctl to the tty subsystem, move the tty setup code into the "core" tty code, which contains tty_init() itself. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <jirislaby@kernel.org> Signed-off-by:
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