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path: root/drivers/char/hw_random/ks-sa-rng.c
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* hwrng: ks-sa - Use pm_runtime_resume_and_get() to replace open codingTian Tao2021-06-031-2/+1
| | | | | | | | | use pm_runtime_resume_and_get() to replace pm_runtime_get_sync and pm_runtime_put_noidle. this change is just to simplify the code, no actual functional changes. Signed-off-by: Tian Tao <tiantao6@hisilicon.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* hwrng: ks-sa - Replace HTTP links with HTTPS onesAlexander A. Klimov2020-07-161-1/+1
| | | | | | | | | | | | | | | | | | | | Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Deterministic algorithm: For each file: If not .svg: For each line: If doesn't contain `\bxmlns\b`: For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`: If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`: If both the HTTP and HTTPS versions return 200 OK and serve the same content: Replace HTTP with HTTPS. Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* hwrng: ks-sa - Fix runtime PM imbalance on errorDinghao Liu2020-06-151-0/+1
| | | | | | | | | | pm_runtime_get_sync() increments the runtime PM usage counter even the call returns an error code. Thus a pairing decrement is needed on the error handling path to keep the counter balanced. Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn> Reviewed-by: Alexander Sverdlin <alexander.sverdlin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* hwrng: ks-sa - Add minimum sleep time before ready-pollingAlexander Sverdlin2019-11-171-0/+38
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Current polling timeout is 25 us. The hardware is currently configured to harvest the entropy for 81920 us. This leads to timeouts even during blocking read (wait=1). Log snippet: [ 5.727589] [<c040ffcc>] (ks_sa_rng_probe) from [<c04181e8>] (platform_drv_probe+0x58/0xb4) ... [ 5.727805] hwrng: no data available ... [ 13.157016] random: systemd: uninitialized urandom read (16 bytes read) [ 13.157033] systemd[1]: Initializing machine ID from random generator. ... [ 15.848770] random: fast init done ... [ 15.848807] random: crng init done After the patch: [ 6.223534] random: systemd: uninitialized urandom read (16 bytes read) [ 6.223551] systemd[1]: Initializing machine ID from random generator. ... [ 6.876075] random: fast init done ... [ 6.954200] random: systemd: uninitialized urandom read (16 bytes read) [ 6.955244] random: systemd: uninitialized urandom read (16 bytes read) ... [ 7.121948] random: crng init done Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* hwrng: ks-sa - use devm_platform_ioremap_resource() to simplify codeYueHaibing2019-10-261-3/+1
| | | | | | | | Use devm_platform_ioremap_resource() to simplify the code a bit. This is detected by coccinelle. Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* hwrng: ka-sa - fix __iomem on registersBen Dooks2019-10-261-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add __ioemm attribute to reg_rng to fix the following sparse warnings: drivers/char/hw_random/ks-sa-rng.c:102:9: warning: incorrect type in argument 2 (different address spaces) drivers/char/hw_random/ks-sa-rng.c:102:9: expected void volatile [noderef] <asn:2> *addr drivers/char/hw_random/ks-sa-rng.c:102:9: got unsigned int * drivers/char/hw_random/ks-sa-rng.c:104:9: warning: incorrect type in argument 2 (different address spaces) drivers/char/hw_random/ks-sa-rng.c:104:9: expected void volatile [noderef] <asn:2> *addr drivers/char/hw_random/ks-sa-rng.c:104:9: got unsigned int * drivers/char/hw_random/ks-sa-rng.c:113:9: warning: incorrect type in argument 2 (different address spaces) drivers/char/hw_random/ks-sa-rng.c:113:9: expected void volatile [noderef] <asn:2> *addr drivers/char/hw_random/ks-sa-rng.c:113:9: got unsigned int * drivers/char/hw_random/ks-sa-rng.c:116:9: warning: incorrect type in argument 2 (different address spaces) drivers/char/hw_random/ks-sa-rng.c:116:9: expected void volatile [noderef] <asn:2> *addr drivers/char/hw_random/ks-sa-rng.c:116:9: got unsigned int * drivers/char/hw_random/ks-sa-rng.c:119:17: warning: incorrect type in argument 1 (different address spaces) drivers/char/hw_random/ks-sa-rng.c:119:17: expected void const volatile [noderef] <asn:2> *addr drivers/char/hw_random/ks-sa-rng.c:119:17: got unsigned int * drivers/char/hw_random/ks-sa-rng.c:121:9: warning: incorrect type in argument 2 (different address spaces) drivers/char/hw_random/ks-sa-rng.c:121:9: expected void volatile [noderef] <asn:2> *addr drivers/char/hw_random/ks-sa-rng.c:121:9: got unsigned int * drivers/char/hw_random/ks-sa-rng.c:132:9: warning: incorrect type in argument 2 (different address spaces) drivers/char/hw_random/ks-sa-rng.c:132:9: expected void volatile [noderef] <asn:2> *addr drivers/char/hw_random/ks-sa-rng.c:132:9: got unsigned int * drivers/char/hw_random/ks-sa-rng.c:143:19: warning: incorrect type in argument 1 (different address spaces) drivers/char/hw_random/ks-sa-rng.c:143:19: expected void const volatile [noderef] <asn:2> *addr drivers/char/hw_random/ks-sa-rng.c:143:19: got unsigned int * drivers/char/hw_random/ks-sa-rng.c:144:19: warning: incorrect type in argument 1 (different address spaces) drivers/char/hw_random/ks-sa-rng.c:144:19: expected void const volatile [noderef] <asn:2> *addr drivers/char/hw_random/ks-sa-rng.c:144:19: got unsigned int * drivers/char/hw_random/ks-sa-rng.c:146:9: warning: incorrect type in argument 2 (different address spaces) drivers/char/hw_random/ks-sa-rng.c:146:9: expected void volatile [noderef] <asn:2> *addr drivers/char/hw_random/ks-sa-rng.c:146:9: got unsigned int * drivers/char/hw_random/ks-sa-rng.c:160:25: warning: incorrect type in argument 1 (different address spaces) drivers/char/hw_random/ks-sa-rng.c:160:25: expected void const volatile [noderef] <asn:2> *addr drivers/char/hw_random/ks-sa-rng.c:160:25: got unsigned int * drivers/char/hw_random/ks-sa-rng.c:194:28: warning: incorrect type in assignment (different address spaces) drivers/char/hw_random/ks-sa-rng.c:194:28: expected struct trng_regs *reg_rng drivers/char/hw_random/ks-sa-rng.c:194:28: got void [noderef] <asn:2> * Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174Thomas Gleixner2019-05-301-9/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 655 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* hwrng: ks-sa - add hw_random driverVitaly Andrianov2018-03-231-0/+257
Keystone Security Accelerator module has a hardware random generator sub-module. This commit adds the driver for this sub-module. Signed-off-by: Vitaly Andrianov <vitalya@ti.com> [t-kristo@ti.com: dropped one unnecessary dev_err message] Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>