Commit 117c3b60 authored by Kishon Vijay Abraham I's avatar Kishon Vijay Abraham I Committed by Lorenzo Pieralisi

PCI: keystone: Use Keystone specific msi_irq_chip

Use Keystone specific msi_irq_chip to configure the MSI controller
logic in the PCIe keystone wrapper instead of using the default
Designware msi_irq chip (dw_pci_msi_bottom_irq_chip) with
callback functions for configuring the Keystone MSI controller.
This will help to remove Keystone specific callback functions
added in dw_pcie_host_ops.

Move the default msi_irq_chip assignment to dw_pcie_host_init since
platforms that doesn't use the default msi_irq_chip will assign
msi_irq_chip in the msi_host_init() callback.
Signed-off-by: default avatarKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
parent 9f67437b
......@@ -105,14 +105,6 @@ struct keystone_pcie {
struct resource app;
};
static phys_addr_t ks_pcie_get_msi_addr(struct pcie_port *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct keystone_pcie *ks_pcie = to_keystone_pcie(pci);
return ks_pcie->app.start + MSI_IRQ;
}
static u32 ks_pcie_app_readl(struct keystone_pcie *ks_pcie, u32 offset)
{
return readl(ks_pcie->va_app_base + offset);
......@@ -124,11 +116,14 @@ static void ks_pcie_app_writel(struct keystone_pcie *ks_pcie, u32 offset,
writel(val, ks_pcie->va_app_base + offset);
}
static void ks_pcie_msi_irq_ack(int irq, struct pcie_port *pp)
static void ks_pcie_msi_irq_ack(struct irq_data *data)
{
u32 reg_offset, bit_pos;
struct pcie_port *pp = irq_data_get_irq_chip_data(data);
struct keystone_pcie *ks_pcie;
u32 irq = data->hwirq;
struct dw_pcie *pci;
u32 reg_offset;
u32 bit_pos;
pci = to_dw_pcie_from_pp(pp);
ks_pcie = to_keystone_pcie(pci);
......@@ -141,34 +136,91 @@ static void ks_pcie_msi_irq_ack(int irq, struct pcie_port *pp)
ks_pcie_app_writel(ks_pcie, IRQ_EOI, reg_offset + MSI_IRQ_OFFSET);
}
static void ks_pcie_msi_set_irq(struct pcie_port *pp, int irq)
static void ks_pcie_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
{
u32 reg_offset, bit_pos;
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct keystone_pcie *ks_pcie = to_keystone_pcie(pci);
struct pcie_port *pp = irq_data_get_irq_chip_data(data);
struct keystone_pcie *ks_pcie;
struct dw_pcie *pci;
u64 msi_target;
pci = to_dw_pcie_from_pp(pp);
ks_pcie = to_keystone_pcie(pci);
msi_target = ks_pcie->app.start + MSI_IRQ;
msg->address_lo = lower_32_bits(msi_target);
msg->address_hi = upper_32_bits(msi_target);
msg->data = data->hwirq;
dev_dbg(pci->dev, "msi#%d address_hi %#x address_lo %#x\n",
(int)data->hwirq, msg->address_hi, msg->address_lo);
}
static int ks_pcie_msi_set_affinity(struct irq_data *irq_data,
const struct cpumask *mask, bool force)
{
return -EINVAL;
}
static void ks_pcie_msi_mask(struct irq_data *data)
{
struct pcie_port *pp = irq_data_get_irq_chip_data(data);
struct keystone_pcie *ks_pcie;
u32 irq = data->hwirq;
struct dw_pcie *pci;
unsigned long flags;
u32 reg_offset;
u32 bit_pos;
raw_spin_lock_irqsave(&pp->lock, flags);
pci = to_dw_pcie_from_pp(pp);
ks_pcie = to_keystone_pcie(pci);
reg_offset = irq % 8;
bit_pos = irq >> 3;
ks_pcie_app_writel(ks_pcie, MSI_IRQ_ENABLE_SET(reg_offset),
ks_pcie_app_writel(ks_pcie, MSI_IRQ_ENABLE_CLR(reg_offset),
BIT(bit_pos));
raw_spin_unlock_irqrestore(&pp->lock, flags);
}
static void ks_pcie_msi_clear_irq(struct pcie_port *pp, int irq)
static void ks_pcie_msi_unmask(struct irq_data *data)
{
u32 reg_offset, bit_pos;
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct keystone_pcie *ks_pcie = to_keystone_pcie(pci);
struct pcie_port *pp = irq_data_get_irq_chip_data(data);
struct keystone_pcie *ks_pcie;
u32 irq = data->hwirq;
struct dw_pcie *pci;
unsigned long flags;
u32 reg_offset;
u32 bit_pos;
raw_spin_lock_irqsave(&pp->lock, flags);
pci = to_dw_pcie_from_pp(pp);
ks_pcie = to_keystone_pcie(pci);
reg_offset = irq % 8;
bit_pos = irq >> 3;
ks_pcie_app_writel(ks_pcie, MSI_IRQ_ENABLE_CLR(reg_offset),
ks_pcie_app_writel(ks_pcie, MSI_IRQ_ENABLE_SET(reg_offset),
BIT(bit_pos));
raw_spin_unlock_irqrestore(&pp->lock, flags);
}
static struct irq_chip ks_pcie_msi_irq_chip = {
.name = "KEYSTONE-PCI-MSI",
.irq_ack = ks_pcie_msi_irq_ack,
.irq_compose_msi_msg = ks_pcie_compose_msi_msg,
.irq_set_affinity = ks_pcie_msi_set_affinity,
.irq_mask = ks_pcie_msi_mask,
.irq_unmask = ks_pcie_msi_unmask,
};
static int ks_pcie_msi_host_init(struct pcie_port *pp)
{
pp->msi_irq_chip = &ks_pcie_msi_irq_chip;
return dw_pcie_allocate_domains(pp);
}
......@@ -785,11 +837,7 @@ static const struct dw_pcie_host_ops ks_pcie_host_ops = {
.rd_other_conf = ks_pcie_rd_other_conf,
.wr_other_conf = ks_pcie_wr_other_conf,
.host_init = ks_pcie_host_init,
.msi_set_irq = ks_pcie_msi_set_irq,
.msi_clear_irq = ks_pcie_msi_clear_irq,
.get_msi_addr = ks_pcie_get_msi_addr,
.msi_host_init = ks_pcie_msi_host_init,
.msi_irq_ack = ks_pcie_msi_irq_ack,
.scan_bus = ks_pcie_v3_65_scan_bus,
};
......
......@@ -277,9 +277,6 @@ int dw_pcie_allocate_domains(struct pcie_port *pp)
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct fwnode_handle *fwnode = of_node_to_fwnode(pci->dev->of_node);
if (!pp->msi_irq_chip)
pp->msi_irq_chip = &dw_pci_msi_bottom_irq_chip;
pp->irq_domain = irq_domain_create_linear(fwnode, pp->num_vectors,
&dw_pcie_msi_domain_ops, pp);
if (!pp->irq_domain) {
......@@ -462,6 +459,8 @@ int dw_pcie_host_init(struct pcie_port *pp)
}
if (!pp->ops->msi_host_init) {
pp->msi_irq_chip = &dw_pci_msi_bottom_irq_chip;
ret = dw_pcie_allocate_domains(pp);
if (ret)
goto error;
......
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