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path: root/drivers/pci/controller/dwc/pcie-designware-host.c
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Diffstat (limited to 'drivers/pci/controller/dwc/pcie-designware-host.c')
-rw-r--r--drivers/pci/controller/dwc/pcie-designware-host.c107
1 files changed, 44 insertions, 63 deletions
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 906277f9ffaf..952f8594b501 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -10,6 +10,7 @@
#include <linux/iopoll.h>
#include <linux/irqchip/chained_irq.h>
+#include <linux/irqchip/irq-msi-lib.h>
#include <linux/irqdomain.h>
#include <linux/msi.h>
#include <linux/of_address.h>
@@ -23,35 +24,21 @@
static struct pci_ops dw_pcie_ops;
static struct pci_ops dw_child_pcie_ops;
-static void dw_msi_ack_irq(struct irq_data *d)
-{
- irq_chip_ack_parent(d);
-}
-
-static void dw_msi_mask_irq(struct irq_data *d)
-{
- pci_msi_mask_irq(d);
- irq_chip_mask_parent(d);
-}
-
-static void dw_msi_unmask_irq(struct irq_data *d)
-{
- pci_msi_unmask_irq(d);
- irq_chip_unmask_parent(d);
-}
-
-static struct irq_chip dw_pcie_msi_irq_chip = {
- .name = "PCI-MSI",
- .irq_ack = dw_msi_ack_irq,
- .irq_mask = dw_msi_mask_irq,
- .irq_unmask = dw_msi_unmask_irq,
-};
-
-static struct msi_domain_info dw_pcie_msi_domain_info = {
- .flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
- MSI_FLAG_NO_AFFINITY | MSI_FLAG_PCI_MSIX |
- MSI_FLAG_MULTI_PCI_MSI,
- .chip = &dw_pcie_msi_irq_chip,
+#define DW_PCIE_MSI_FLAGS_REQUIRED (MSI_FLAG_USE_DEF_DOM_OPS | \
+ MSI_FLAG_USE_DEF_CHIP_OPS | \
+ MSI_FLAG_NO_AFFINITY | \
+ MSI_FLAG_PCI_MSI_MASK_PARENT)
+#define DW_PCIE_MSI_FLAGS_SUPPORTED (MSI_FLAG_MULTI_PCI_MSI | \
+ MSI_FLAG_PCI_MSIX | \
+ MSI_GENERIC_FLAGS_MASK)
+
+static const struct msi_parent_ops dw_pcie_msi_parent_ops = {
+ .required_flags = DW_PCIE_MSI_FLAGS_REQUIRED,
+ .supported_flags = DW_PCIE_MSI_FLAGS_SUPPORTED,
+ .bus_select_token = DOMAIN_BUS_PCI_MSI,
+ .chip_flags = MSI_CHIP_FLAG_SET_ACK,
+ .prefix = "DW-",
+ .init_dev_msi_info = msi_lib_init_dev_msi_info,
};
/* MSI int handler */
@@ -227,30 +214,23 @@ static const struct irq_domain_ops dw_pcie_msi_domain_ops = {
int dw_pcie_allocate_domains(struct dw_pcie_rp *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- struct fwnode_handle *fwnode = of_fwnode_handle(pci->dev->of_node);
-
- pp->irq_domain = irq_domain_create_linear(fwnode, pp->num_vectors,
- &dw_pcie_msi_domain_ops, pp);
+ struct irq_domain_info info = {
+ .fwnode = dev_fwnode(pci->dev),
+ .ops = &dw_pcie_msi_domain_ops,
+ .size = pp->num_vectors,
+ .host_data = pp,
+ };
+
+ pp->irq_domain = msi_create_parent_irq_domain(&info, &dw_pcie_msi_parent_ops);
if (!pp->irq_domain) {
dev_err(pci->dev, "Failed to create IRQ domain\n");
return -ENOMEM;
}
- irq_domain_update_bus_token(pp->irq_domain, DOMAIN_BUS_NEXUS);
-
- pp->msi_domain = pci_msi_create_irq_domain(fwnode,
- &dw_pcie_msi_domain_info,
- pp->irq_domain);
- if (!pp->msi_domain) {
- dev_err(pci->dev, "Failed to create MSI domain\n");
- irq_domain_remove(pp->irq_domain);
- return -ENOMEM;
- }
-
return 0;
}
-static void dw_pcie_free_msi(struct dw_pcie_rp *pp)
+void dw_pcie_free_msi(struct dw_pcie_rp *pp)
{
u32 ctrl;
@@ -260,22 +240,36 @@ static void dw_pcie_free_msi(struct dw_pcie_rp *pp)
NULL, NULL);
}
- irq_domain_remove(pp->msi_domain);
irq_domain_remove(pp->irq_domain);
}
+EXPORT_SYMBOL_GPL(dw_pcie_free_msi);
-static void dw_pcie_msi_init(struct dw_pcie_rp *pp)
+void dw_pcie_msi_init(struct dw_pcie_rp *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
u64 msi_target = (u64)pp->msi_data;
+ u32 ctrl, num_ctrls;
if (!pci_msi_enabled() || !pp->has_msi_ctrl)
return;
+ num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL;
+
+ /* Initialize IRQ Status array */
+ for (ctrl = 0; ctrl < num_ctrls; ctrl++) {
+ dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_MASK +
+ (ctrl * MSI_REG_CTRL_BLOCK_SIZE),
+ pp->irq_mask[ctrl]);
+ dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_ENABLE +
+ (ctrl * MSI_REG_CTRL_BLOCK_SIZE),
+ ~0);
+ }
+
/* Program the msi_data */
dw_pcie_writel_dbi(pci, PCIE_MSI_ADDR_LO, lower_32_bits(msi_target));
dw_pcie_writel_dbi(pci, PCIE_MSI_ADDR_HI, upper_32_bits(msi_target));
}
+EXPORT_SYMBOL_GPL(dw_pcie_msi_init);
static int dw_pcie_parse_split_msi_irq(struct dw_pcie_rp *pp)
{
@@ -317,7 +311,7 @@ static int dw_pcie_parse_split_msi_irq(struct dw_pcie_rp *pp)
return 0;
}
-static int dw_pcie_msi_host_init(struct dw_pcie_rp *pp)
+int dw_pcie_msi_host_init(struct dw_pcie_rp *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct device *dev = pci->dev;
@@ -391,6 +385,7 @@ static int dw_pcie_msi_host_init(struct dw_pcie_rp *pp)
return 0;
}
+EXPORT_SYMBOL_GPL(dw_pcie_msi_host_init);
static void dw_pcie_host_request_msg_tlp_res(struct dw_pcie_rp *pp)
{
@@ -909,7 +904,7 @@ static void dw_pcie_config_presets(struct dw_pcie_rp *pp)
int dw_pcie_setup_rc(struct dw_pcie_rp *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- u32 val, ctrl, num_ctrls;
+ u32 val;
int ret;
/*
@@ -920,20 +915,6 @@ int dw_pcie_setup_rc(struct dw_pcie_rp *pp)
dw_pcie_setup(pci);
- if (pp->has_msi_ctrl) {
- num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL;
-
- /* Initialize IRQ Status array */
- for (ctrl = 0; ctrl < num_ctrls; ctrl++) {
- dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_MASK +
- (ctrl * MSI_REG_CTRL_BLOCK_SIZE),
- pp->irq_mask[ctrl]);
- dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_ENABLE +
- (ctrl * MSI_REG_CTRL_BLOCK_SIZE),
- ~0);
- }
- }
-
dw_pcie_msi_init(pp);
/* Setup RC BARs */