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Thu, 21 May 2020 12:28:56 +0000 (GMT) From: Sylwester Nawrocki To: georgi.djakov@linaro.org Cc: a.swigon@samsung.com, cw00.choi@samsung.com, b.zolnierkie@samsung.com, m.szyprowski@samsung.com, krzk@kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org, Sylwester Nawrocki Subject: [PATCH v5 3/3] interconnect: Allow inter-provider pairs to be configured Date: Thu, 21 May 2020 14:28:41 +0200 Message-Id: <20200521122841.8867-4-s.nawrocki@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200521122841.8867-1-s.nawrocki@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrKKsWRmVeSWpSXmKPExsWy7djPc7qcJcfiDF7vkLO4P6+V0WLjjPWs Fte/PGe1mL53E5vF+fMb2C0u75rDZvG59wijxYzz+5gs1h65y25x+E07qwOXx6ZVnWwed67t YfPo27KK0ePzJrkAligum5TUnMyy1CJ9uwSujPe9F9gLjolU7G3sYmlgvCDQxcjBISFgIrF4 c3oXIxeHkMAKRonWzztYIJwvjBIzF25khnA+M0r0LtrMAtPxcY9dFyMnUHw5UNGberiGZbv3 sIAk2AQMJXqP9jGC2CICMhJ7miaxghQxCzQxSdxcvAFskLBAsMSB9eUgJouAqsTUezUg5bwC VhLnF3xjA7ElBOQlVm84wAxicwpYS2w7NoUJokZQ4uTMJ2CrmIFqmrfOZoao38Yu8eSID4Tt IvF86wNWCFtY4tXxLewQtozE/53zmUDOkRBoZpTo2X2bHcKZwChx//gCRogqa4k7536xgRzH LKApsX6XPkTYUWLT7OXMkHDgk7jxVhDiBj6JSdumQ4V5JTrahCCqVSR+r5rOBGFLSXQ/+c8C YXtITN99lmUCo+IsJN/MQvLNLIS9CxiZVzGKp5YW56anFhvlpZbrFSfmFpfmpesl5+duYgQm ntP/jn/ZwbjrT9IhRgEORiUe3gfJx+KEWBPLiitzDzFKcDArifAu5D8aJ8SbklhZlVqUH19U mpNafIhRmoNFSZzXeNHLWCGB9MSS1OzU1ILUIpgsEwenVAPj6nkn+jcl8Qeqaxq94jkynyfb c/6Bi++zq688/7w3IObRpgnXxZ8fZtWfaHDjvPJf7o45aVvvsy1RSOuS+zN31lqGmA5GRieX X5WrrTVqZh1b2Xks+IeSVMQflZpTgddcLOZndOt3zXwc0ap7nK1t3RpWTueYU/simh4qrv5i Jt5g5nbX2qleiaU4I9FQi7moOBEAvx4PRDgDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrFIsWRmVeSWpSXmKPExsVy+t/xe7qcJcfiDOae4rO4P6+V0WLjjPWs Fte/PGe1mL53E5vF+fMb2C0u75rDZvG59wijxYzz+5gs1h65y25x+E07qwOXx6ZVnWwed67t YfPo27KK0ePzJrkAlig9m6L80pJUhYz84hJbpWhDCyM9Q0sLPSMTSz1DY/NYKyNTJX07m5TU nMyy1CJ9uwS9jPe9F9gLjolU7G3sYmlgvCDQxcjBISFgIvFxj10XIxeHkMBSRolJK/qYIOJS EvNblLoYOYFMYYk/17rYQGwhgU+MEpe3MIPYbAKGEr1H+xhBbBEBGYk9TZNYQeYwC/QwSZz5 vIAdJCEsECgxqfccC8hMFgFVian3akDCvAJWEucXfGODmC8vsXrDAbCZnALWEtuOTWGC2GUl cfHBAXaIekGJkzOfgI1hFlCXWD9PCCTMDNTavHU28wRGwVlIqmYhVM1CUrWAkXkVo0hqaXFu em6xkV5xYm5xaV66XnJ+7iZGYDxtO/Zzyw7GrnfBhxgFOBiVeHgfJB+LE2JNLCuuzD3EKMHB rCTCu5D/aJwQb0piZVVqUX58UWlOavEhRlOgzyYyS4km5wNjPa8k3tDU0NzC0tDc2NzYzEJJ nLdD4GCMkEB6YklqdmpqQWoRTB8TB6dUA+MiZ/Y5GW8O9q2QVoqae+ulYTO7Qq/p/VVs/RlP zhbGR0dl2tvarknZevKS6+T6ic9N9Jo4bI2qZDr3ump1Xlhd+OlwljZLy7GdkUsKN+Z83rf5 tr6zwB47vSNTc/4Ly6WunBNzUGNh/t/C/aFJjRHH4koVHVPXHNpivmRe/W/fn5M6FoV4/FRi Kc5INNRiLipOBABEHfAAvQIAAA== X-CMS-MailID: 20200521122857eucas1p1db29d5dd09e801ca22214e94022a951b X-Msg-Generator: CA X-RootMTR: 20200521122857eucas1p1db29d5dd09e801ca22214e94022a951b X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200521122857eucas1p1db29d5dd09e801ca22214e94022a951b References: <20200521122841.8867-1-s.nawrocki@samsung.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Artur Świgoń This patch adds support for a new boolean 'inter_set' field in struct icc_provider. Setting it to 'true' enables calling '->set' for inter-provider node pairs. All existing users of the interconnect framework allocate this structure with kzalloc, and are therefore unaffected by this change. This makes it easier for hierarchies like exynos-bus, where every bus is probed separately and registers a separate interconnect provider, to model constraints between buses. Signed-off-by: Artur Świgoń Signed-off-by: Sylwester Nawrocki Acked-by: Krzysztof Kozlowski --- drivers/interconnect/core.c | 11 +++++------ include/linux/interconnect-provider.h | 2 ++ 2 files changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c index 6a342ef..b549249 100644 --- a/drivers/interconnect/core.c +++ b/drivers/interconnect/core.c @@ -263,23 +263,22 @@ static int aggregate_requests(struct icc_node *node) static int apply_constraints(struct icc_path *path) { struct icc_node *next, *prev = NULL; + struct icc_provider *p; int ret = -EINVAL; int i; for (i = 0; i < path->num_nodes; i++) { next = path->reqs[i].node; + p = next->provider; - /* - * Both endpoints should be valid master-slave pairs of the - * same interconnect provider that will be configured. - */ - if (!prev || next->provider != prev->provider) { + /* both endpoints should be valid master-slave pairs */ + if (!prev || (p != prev->provider && !p->inter_set)) { prev = next; continue; } /* set the constraints */ - ret = next->provider->set(prev, next); + ret = p->set(prev, next); if (ret) goto out; diff --git a/include/linux/interconnect-provider.h b/include/linux/interconnect-provider.h index c92be2a..38701925 100644 --- a/include/linux/interconnect-provider.h +++ b/include/linux/interconnect-provider.h @@ -41,6 +41,7 @@ struct icc_node *of_icc_xlate_onecell(struct of_phandle_args *spec, * @xlate: provider-specific callback for mapping nodes from phandle arguments * @dev: the device this interconnect provider belongs to * @users: count of active users + * @inter_set: whether inter-provider pairs will be configured with @set * @data: pointer to private data */ struct icc_provider { @@ -53,6 +54,7 @@ struct icc_provider { struct icc_node* (*xlate)(struct of_phandle_args *spec, void *data); struct device *dev; int users; + bool inter_set; void *data; };