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Message-Id: <20210816075252.4003406-5-chenhuacai@loongson.cn>
Date: Mon, 16 Aug 2021 15:52:46 +0800
From: Huacai Chen <chenhuacai@...ngson.cn>
To: Thomas Gleixner <tglx@...utronix.de>, Marc Zyngier <maz@...nel.org>
Cc: linux-kernel@...r.kernel.org, Xuefeng Li <lixuefeng@...ngson.cn>,
Huacai Chen <chenhuacai@...il.com>,
Jiaxun Yang <jiaxun.yang@...goat.com>,
Huacai Chen <chenhuacai@...ngson.cn>
Subject: [PATCH V2 04/10] irqchip/loongson-pch-msi: Add ACPI init support
We are preparing to add new Loongson (based on LoongArch, not MIPS)
support. LoongArch use ACPI other than DT as its boot protocol, so
add ACPI init support.
Signed-off-by: Huacai Chen <chenhuacai@...ngson.cn>
---
drivers/irqchip/irq-loongson-pch-msi.c | 126 ++++++++++++++++---------
1 file changed, 84 insertions(+), 42 deletions(-)
diff --git a/drivers/irqchip/irq-loongson-pch-msi.c b/drivers/irqchip/irq-loongson-pch-msi.c
index 32562b7e681b..1ecb15f8745b 100644
--- a/drivers/irqchip/irq-loongson-pch-msi.c
+++ b/drivers/irqchip/irq-loongson-pch-msi.c
@@ -21,6 +21,7 @@ struct pch_msi_data {
u32 irq_first; /* The vector number that MSIs starts */
u32 num_irqs; /* The number of vectors for MSIs */
unsigned long *msi_map;
+ struct fwnode_handle *domain_handle;
};
static void pch_msi_mask_msi_irq(struct irq_data *d)
@@ -154,12 +155,14 @@ static const struct irq_domain_ops pch_msi_middle_domain_ops = {
};
static int pch_msi_init_domains(struct pch_msi_data *priv,
- struct device_node *node,
- struct irq_domain *parent)
+ struct irq_domain *parent,
+ struct fwnode_handle *domain_handle)
{
struct irq_domain *middle_domain, *msi_domain;
- middle_domain = irq_domain_create_linear(of_node_to_fwnode(node),
+ priv->domain_handle = domain_handle;
+
+ middle_domain = irq_domain_create_linear(priv->domain_handle,
priv->num_irqs,
&pch_msi_middle_domain_ops,
priv);
@@ -171,7 +174,7 @@ static int pch_msi_init_domains(struct pch_msi_data *priv,
middle_domain->parent = parent;
irq_domain_update_bus_token(middle_domain, DOMAIN_BUS_NEXUS);
- msi_domain = pci_msi_create_irq_domain(of_node_to_fwnode(node),
+ msi_domain = pci_msi_create_irq_domain(priv->domain_handle,
&pch_msi_domain_info,
middle_domain);
if (!msi_domain) {
@@ -183,19 +186,11 @@ static int pch_msi_init_domains(struct pch_msi_data *priv,
return 0;
}
-static int pch_msi_init(struct device_node *node,
- struct device_node *parent)
+static int pch_msi_init(phys_addr_t msg_address, int irq_base, int irq_count,
+ struct irq_domain *parent_domain, struct fwnode_handle *domain_handle)
{
- struct pch_msi_data *priv;
- struct irq_domain *parent_domain;
- struct resource res;
int ret;
-
- parent_domain = irq_find_host(parent);
- if (!parent_domain) {
- pr_err("Failed to find the parent domain\n");
- return -ENXIO;
- }
+ struct pch_msi_data *priv;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
@@ -203,38 +198,18 @@ static int pch_msi_init(struct device_node *node,
mutex_init(&priv->msi_map_lock);
- ret = of_address_to_resource(node, 0, &res);
- if (ret) {
- pr_err("Failed to allocate resource\n");
- goto err_priv;
- }
-
- priv->doorbell = res.start;
-
- if (of_property_read_u32(node, "loongson,msi-base-vec",
- &priv->irq_first)) {
- pr_err("Unable to parse MSI vec base\n");
- ret = -EINVAL;
- goto err_priv;
- }
-
- if (of_property_read_u32(node, "loongson,msi-num-vecs",
- &priv->num_irqs)) {
- pr_err("Unable to parse MSI vec number\n");
- ret = -EINVAL;
- goto err_priv;
- }
+ priv->doorbell = msg_address;
+ priv->irq_first = irq_base;
+ priv->num_irqs = irq_count;
priv->msi_map = bitmap_zalloc(priv->num_irqs, GFP_KERNEL);
- if (!priv->msi_map) {
- ret = -ENOMEM;
+ if (!priv->msi_map)
goto err_priv;
- }
pr_debug("Registering %d MSIs, starting at %d\n",
priv->num_irqs, priv->irq_first);
- ret = pch_msi_init_domains(priv, node, parent_domain);
+ ret = pch_msi_init_domains(priv, parent_domain, domain_handle);
if (ret)
goto err_map;
@@ -244,7 +219,74 @@ static int pch_msi_init(struct device_node *node,
kfree(priv->msi_map);
err_priv:
kfree(priv);
- return ret;
+
+ return -EINVAL;
+}
+
+#ifdef CONFIG_OF
+
+int pch_msi_of_init(struct device_node *node, struct device_node *parent)
+{
+ int err;
+ int irq_base, irq_count;
+ struct resource res;
+ struct irq_domain *parent_domain;
+
+ parent_domain = irq_find_host(parent);
+ if (!parent_domain) {
+ pr_err("Failed to find the parent domain\n");
+ return -ENXIO;
+ }
+
+ if (of_address_to_resource(node, 0, &res)) {
+ pr_err("Failed to allocate resource\n");
+ return -EINVAL;
+ }
+
+ if (of_property_read_u32(node, "loongson,msi-base-vec", &irq_base)) {
+ pr_err("Unable to parse MSI vec base\n");
+ return -EINVAL;
+ }
+
+ if (of_property_read_u32(node, "loongson,msi-num-vecs", &irq_count)) {
+ pr_err("Unable to parse MSI vec number\n");
+ return -EINVAL;
+ }
+
+ err = pch_msi_init(res.start, irq_base, irq_count, parent_domain, of_node_to_fwnode(node));
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+IRQCHIP_DECLARE(pch_msi, "loongson,pch-msi-1.0", pch_msi_of_init);
+
+#endif
+
+#ifdef CONFIG_ACPI
+
+struct fwnode_handle *pch_msi_acpi_init(struct fwnode_handle *parent,
+ struct acpi_madt_msi_pic *acpi_pchmsi)
+{
+ int ret;
+ struct irq_domain *parent_domain;
+ struct fwnode_handle *domain_handle;
+
+ parent_domain = irq_find_matching_fwnode(parent, DOMAIN_BUS_ANY);
+ if (!parent_domain) {
+ pr_err("Failed to find the parent domain\n");
+ return NULL;
+ }
+
+ domain_handle = irq_domain_alloc_fwnode((phys_addr_t *)acpi_pchmsi);
+
+ ret = pch_msi_init(acpi_pchmsi->msg_address, acpi_pchmsi->start,
+ acpi_pchmsi->count, parent_domain, domain_handle);
+ if (ret < 0)
+ return NULL;
+
+ return domain_handle;
}
-IRQCHIP_DECLARE(pch_msi, "loongson,pch-msi-1.0", pch_msi_init);
+#endif
--
2.27.0
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