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Sun, 22 Sep 2019 23:24:58 -0500 Received: from DLEE115.ent.ti.com (157.170.170.26) by DLEE103.ent.ti.com (157.170.170.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Sun, 22 Sep 2019 23:24:52 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DLEE115.ent.ti.com (157.170.170.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5 via Frontend Transport; Sun, 22 Sep 2019 23:24:57 -0500 Received: from uda0131933.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id x8N4OqE1094081; Sun, 22 Sep 2019 23:24:56 -0500 From: Lokesh Vutla To: Marc Zyngier Subject: [RFC PATCH 2/2] irqchip/ti-sci-intr: Add support for INTR being a parent to INTR Date: Mon, 23 Sep 2019 09:54:05 +0530 Message-ID: <20190923042405.26064-3-lokeshvutla@ti.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190923042405.26064-1-lokeshvutla@ti.com> References: <20190923042405.26064-1-lokeshvutla@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190922_212459_868067_E4A701D2 X-CRM114-Status: GOOD ( 18.87 ) X-Spam-Score: -2.5 (--) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-2.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [198.47.19.141 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Nishanth Menon , Lokesh Vutla , Linux ARM Mailing List Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Driver assumes that Interrupt parent to Interrupt router is always GIC. This is not true always and a Interrupt Router can be a parent to Interrupt Router. Update the driver to detect the parent and request the parent irqs accordingly. Signed-off-by: Lokesh Vutla --- drivers/irqchip/irq-ti-sci-intr.c | 137 ++++++++++++++++++------------ 1 file changed, 82 insertions(+), 55 deletions(-) diff --git a/drivers/irqchip/irq-ti-sci-intr.c b/drivers/irqchip/irq-ti-sci-intr.c index 59d51a20bbd8..1d8aaa871798 100644 --- a/drivers/irqchip/irq-ti-sci-intr.c +++ b/drivers/irqchip/irq-ti-sci-intr.c @@ -17,29 +17,18 @@ #include #include -#define TI_SCI_DEV_ID_MASK 0xffff -#define TI_SCI_DEV_ID_SHIFT 16 -#define TI_SCI_IRQ_ID_MASK 0xffff -#define TI_SCI_IRQ_ID_SHIFT 0 -#define HWIRQ_TO_DEVID(hwirq) (((hwirq) >> (TI_SCI_DEV_ID_SHIFT)) & \ - (TI_SCI_DEV_ID_MASK)) -#define HWIRQ_TO_IRQID(hwirq) ((hwirq) & (TI_SCI_IRQ_ID_MASK)) -#define TO_HWIRQ(dev, index) ((((dev) & TI_SCI_DEV_ID_MASK) << \ - TI_SCI_DEV_ID_SHIFT) | \ - ((index) & TI_SCI_IRQ_ID_MASK)) - /** * struct ti_sci_intr_irq_domain - Structure representing a TISCI based * Interrupt Router IRQ domain. * @sci: Pointer to TISCI handle - * @dst_irq: TISCI resource pointer representing GIC irq controller. - * @dst_id: TISCI device ID of the GIC irq controller. + * @out_irqs: TISCI resource pointer representing INTR irqs. + * @pdev: Pointer to platform device. * @type: Specifies the trigger type supported by this Interrupt Router */ struct ti_sci_intr_irq_domain { const struct ti_sci_handle *sci; - struct ti_sci_resource *dst_irq; - u32 dst_id; + struct ti_sci_resource *out_irqs; + struct platform_device *pdev; u32 type; }; @@ -70,15 +59,43 @@ static int ti_sci_intr_irq_domain_translate(struct irq_domain *domain, { struct ti_sci_intr_irq_domain *intr = domain->host_data; - if (fwspec->param_count != 2) + if (fwspec->param_count != 1) return -EINVAL; - *hwirq = TO_HWIRQ(fwspec->param[0], fwspec->param[1]); + *hwirq = fwspec->param[0]; *type = intr->type; return 0; } +static int ti_sci_intr_xlate_irq(struct ti_sci_intr_irq_domain *intr, + u32 irq, bool to_parent_hwirq) +{ + struct device_node *np = dev_of_node(&intr->pdev->dev); + u32 base, pbase, size, len; + const __be32 *range; + + range = of_get_property(np, "interrupt-ranges", &len); + if (!range) + return irq; + + for (len /= sizeof(*range); len >= 3; len -= 3) { + base = be32_to_cpu(*range++); + pbase = be32_to_cpu(*range++); + size = be32_to_cpu(*range++); + + if (to_parent_hwirq) { + if (base <= irq && irq < base + size) + return irq - base + pbase; + } else { + if (pbase <= irq && irq < pbase + size) + return irq - pbase + base; + } + } + + return -ENOENT; +} + /** * ti_sci_intr_irq_domain_free() - Free the specified IRQs from the domain. * @domain: Domain to which the irqs belong @@ -90,56 +107,72 @@ static void ti_sci_intr_irq_domain_free(struct irq_domain *domain, { struct ti_sci_intr_irq_domain *intr = domain->host_data; struct irq_data *data, *parent_data; - u16 dev_id, irq_index; + int out_irq; parent_data = irq_domain_get_irq_data(domain->parent, virq); + out_irq = ti_sci_intr_xlate_irq(intr, parent_data->hwirq, false); data = irq_domain_get_irq_data(domain, virq); - irq_index = HWIRQ_TO_IRQID(data->hwirq); - dev_id = HWIRQ_TO_DEVID(data->hwirq); - intr->sci->ops.rm_irq_ops.free_irq(intr->sci, dev_id, irq_index, - intr->dst_id, parent_data->hwirq); - ti_sci_release_resource(intr->dst_irq, parent_data->hwirq); + intr->sci->ops.rm_irq_ops.free_irq(intr->sci, + intr->pdev->id, data->hwirq, + intr->pdev->id, out_irq); + ti_sci_release_resource(intr->out_irqs, out_irq); irq_domain_free_irqs_parent(domain, virq, 1); irq_domain_reset_irq_data(data); } /** - * ti_sci_intr_alloc_gic_irq() - Allocate GIC specific IRQ + * ti_sci_intr_alloc_parent_irq() - Allocate parent IRQ * @domain: Pointer to the interrupt router IRQ domain * @virq: Corresponding Linux virtual IRQ number * @hwirq: Corresponding hwirq for the IRQ within this IRQ domain * * Returns 0 if all went well else appropriate error pointer. */ -static int ti_sci_intr_alloc_gic_irq(struct irq_domain *domain, - unsigned int virq, u32 hwirq) +static int ti_sci_intr_alloc_parent_irq(struct irq_domain *domain, + unsigned int virq, u32 hwirq) { struct ti_sci_intr_irq_domain *intr = domain->host_data; + struct device_node *parent_node; struct irq_fwspec fwspec; - u16 dev_id, irq_index; - u16 dst_irq; - int err; + u16 out_irq, p_hwirq; + int err = 0; - dev_id = HWIRQ_TO_DEVID(hwirq); - irq_index = HWIRQ_TO_IRQID(hwirq); - - dst_irq = ti_sci_get_free_resource(intr->dst_irq); - if (dst_irq == TI_SCI_RESOURCE_NULL) + out_irq = ti_sci_get_free_resource(intr->out_irqs); + if (out_irq == TI_SCI_RESOURCE_NULL) return -EINVAL; - fwspec.fwnode = domain->parent->fwnode; - fwspec.param_count = 3; - fwspec.param[0] = 0; /* SPI */ - fwspec.param[1] = dst_irq - 32; /* SPI offset */ - fwspec.param[2] = intr->type; + p_hwirq = ti_sci_intr_xlate_irq(intr, out_irq, true); + if (p_hwirq < 0) + goto err_irqs; + + parent_node = of_irq_find_parent(dev_of_node(&intr->pdev->dev)); + fwspec.fwnode = of_node_to_fwnode(parent_node); + if (of_property_read_u32(parent_node, "#interrupt-cells", + &fwspec.param_count)) + goto err_irqs; + + if (fwspec.param_count == 1) { + /* Parent is Interrupt Router */ + fwspec.param[0] = p_hwirq; + } else if (fwspec.param_count == 3) { + /* Parent is GIC */ + fwspec.param[0] = 0; /* SPI */ + fwspec.param[1] = p_hwirq; /* SPI offset */ + fwspec.param[2] = intr->type; + } else { + /* Invalid parent */ + dev_err(&intr->pdev->dev, "Unknown IRQ parent to INTR\n"); + goto err_irqs; + } err = irq_domain_alloc_irqs_parent(domain, virq, 1, &fwspec); if (err) goto err_irqs; - err = intr->sci->ops.rm_irq_ops.set_irq(intr->sci, dev_id, irq_index, - intr->dst_id, dst_irq); + err = intr->sci->ops.rm_irq_ops.set_irq(intr->sci, + intr->pdev->id, hwirq, + intr->pdev->id, out_irq); if (err) goto err_msg; @@ -148,7 +181,7 @@ static int ti_sci_intr_alloc_gic_irq(struct irq_domain *domain, err_msg: irq_domain_free_irqs_parent(domain, virq, 1); err_irqs: - ti_sci_release_resource(intr->dst_irq, dst_irq); + ti_sci_release_resource(intr->out_irqs, out_irq); return err; } @@ -174,7 +207,7 @@ static int ti_sci_intr_irq_domain_alloc(struct irq_domain *domain, if (err) return err; - err = ti_sci_intr_alloc_gic_irq(domain, virq, hwirq); + err = ti_sci_intr_alloc_parent_irq(domain, virq, hwirq); if (err) return err; @@ -214,6 +247,7 @@ static int ti_sci_intr_irq_domain_probe(struct platform_device *pdev) if (!intr) return -ENOMEM; + intr->pdev = pdev; ret = of_property_read_u32(dev_of_node(dev), "ti,intr-trigger-type", &intr->type); if (ret) { @@ -230,19 +264,10 @@ static int ti_sci_intr_irq_domain_probe(struct platform_device *pdev) return ret; } - ret = of_property_read_u32(dev_of_node(dev), "ti,sci-dst-id", - &intr->dst_id); - if (ret) { - dev_err(dev, "missing 'ti,sci-dst-id' property\n"); - return -EINVAL; - } - - intr->dst_irq = devm_ti_sci_get_of_resource(intr->sci, dev, - intr->dst_id, - "ti,sci-rm-range-girq"); - if (IS_ERR(intr->dst_irq)) { + intr->out_irqs = devm_ti_sci_get_irq_range(intr->sci, dev); + if (IS_ERR(intr->out_irqs)) { dev_err(dev, "Destination irq resource allocation failed\n"); - return PTR_ERR(intr->dst_irq); + return PTR_ERR(intr->out_irqs); } domain = irq_domain_add_hierarchy(parent_domain, 0, 0, dev_of_node(dev), @@ -252,6 +277,8 @@ static int ti_sci_intr_irq_domain_probe(struct platform_device *pdev) return -ENOMEM; } + dev_info(dev, "Interrupt Router %d domain created\n", pdev->id); + return 0; }