return dw_pcie_write(pci->dbi_base + where, size, val);
}
-static struct irq_chip dw_msi_irq_chip = {
- .name = "PCI-MSI",
- .irq_enable = pci_msi_unmask_irq,
- .irq_disable = pci_msi_mask_irq,
- .irq_mask = pci_msi_mask_irq,
- .irq_unmask = pci_msi_unmask_irq,
-};
-
static void dw_msi_ack_irq(struct irq_data *d)
{
irq_chip_ack_parent(d);
upper_32_bits(msi_target));
}
-static void dw_pcie_msi_clear_irq(struct pcie_port *pp, int irq)
-{
- unsigned int res, bit, ctrl;
-
- ctrl = irq / 32;
- res = ctrl * 12;
- bit = irq % 32;
- pp->irq_status[ctrl] &= ~(1 << bit);
- dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4,
- pp->irq_status[ctrl]);
-}
-
-static void clear_irq_range(struct pcie_port *pp, unsigned int irq_base,
- unsigned int nvec, unsigned int pos)
-{
- unsigned int i;
-
- for (i = 0; i < nvec; i++) {
- irq_set_msi_desc_off(irq_base, i, NULL);
- /* Disable corresponding interrupt on MSI controller */
- if (pp->ops->msi_clear_irq)
- pp->ops->msi_clear_irq(pp, pos + i);
- else
- dw_pcie_msi_clear_irq(pp, pos + i);
- }
-
- bitmap_release_region(pp->msi_irq_in_use, pos, order_base_2(nvec));
-}
-
-static void dw_pcie_msi_set_irq(struct pcie_port *pp, int irq)
-{
- unsigned int res, bit, ctrl;
-
- ctrl = irq / 32;
- res = ctrl * 12;
- bit = irq % 32;
- pp->irq_status[ctrl] |= 1 << bit;
- dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4,
- pp->irq_status[ctrl]);
-}
-
-static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos)
-{
- int irq, pos0, i;
- struct pcie_port *pp;
-
- pp = (struct pcie_port *)msi_desc_to_pci_sysdata(desc);
- pos0 = bitmap_find_free_region(pp->msi_irq_in_use, MAX_MSI_IRQS,
- order_base_2(no_irqs));
- if (pos0 < 0)
- goto no_valid_irq;
-
- irq = irq_find_mapping(pp->irq_domain, pos0);
- if (!irq)
- goto no_valid_irq;
-
- /*
- * irq_create_mapping (called from dw_pcie_host_init) pre-allocates
- * descs so there is no need to allocate descs here. We can therefore
- * assume that if irq_find_mapping above returns non-zero, then the
- * descs are also successfully allocated.
- */
-
- for (i = 0; i < no_irqs; i++) {
- if (irq_set_msi_desc_off(irq, i, desc) != 0) {
- clear_irq_range(pp, irq, i, pos0);
- goto no_valid_irq;
- }
- /*Enable corresponding interrupt in MSI interrupt controller */
- if (pp->ops->msi_set_irq)
- pp->ops->msi_set_irq(pp, pos0 + i);
- else
- dw_pcie_msi_set_irq(pp, pos0 + i);
- }
-
- *pos = pos0;
- desc->nvec_used = no_irqs;
- desc->msi_attrib.multiple = order_base_2(no_irqs);
-
- return irq;
-
-no_valid_irq:
- *pos = pos0;
- return -ENOSPC;
-}
-
-static void dw_msi_setup_msg(struct pcie_port *pp, unsigned int irq, u32 pos)
-{
- struct msi_msg msg;
- u64 msi_target;
-
- if (pp->ops->get_msi_addr)
- msi_target = pp->ops->get_msi_addr(pp);
- else
- msi_target = (u64)pp->msi_data;
-
- msg.address_lo = (u32)(msi_target & 0xffffffff);
- msg.address_hi = (u32)(msi_target >> 32 & 0xffffffff);
-
- if (pp->ops->get_msi_data)
- msg.data = pp->ops->get_msi_data(pp, pos);
- else
- msg.data = pos;
-
- pci_write_msi_msg(irq, &msg);
-}
-
-static int dw_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev,
- struct msi_desc *desc)
-{
- int irq, pos;
- struct pcie_port *pp = pdev->bus->sysdata;
-
- if (desc->msi_attrib.is_msix)
- return -EINVAL;
-
- irq = assign_irq(1, desc, &pos);
- if (irq < 0)
- return irq;
-
- dw_msi_setup_msg(pp, irq, pos);
-
- return 0;
-}
-
-static int dw_msi_setup_irqs(struct msi_controller *chip, struct pci_dev *pdev,
- int nvec, int type)
-{
-#ifdef CONFIG_PCI_MSI
- int irq, pos;
- struct msi_desc *desc;
- struct pcie_port *pp = pdev->bus->sysdata;
-
- /* MSI-X interrupts are not supported */
- if (type == PCI_CAP_ID_MSIX)
- return -EINVAL;
-
- WARN_ON(!list_is_singular(&pdev->dev.msi_list));
- desc = list_entry(pdev->dev.msi_list.next, struct msi_desc, list);
-
- irq = assign_irq(nvec, desc, &pos);
- if (irq < 0)
- return irq;
-
- dw_msi_setup_msg(pp, irq, pos);
-
- return 0;
-#else
- return -EINVAL;
-#endif
-}
-
-static void dw_msi_teardown_irq(struct msi_controller *chip, unsigned int irq)
-{
- struct irq_data *data = irq_get_irq_data(irq);
- struct msi_desc *msi = irq_data_get_msi_desc(data);
- struct pcie_port *pp = (struct pcie_port *)msi_desc_to_pci_sysdata(msi);
-
- clear_irq_range(pp, irq, 1, data->hwirq);
-}
-
-static struct msi_controller dw_pcie_msi_chip = {
- .setup_irq = dw_msi_setup_irq,
- .setup_irqs = dw_msi_setup_irqs,
- .teardown_irq = dw_msi_teardown_irq,
-};
-
-static int dw_pcie_msi_map(struct irq_domain *domain, unsigned int irq,
- irq_hw_number_t hwirq)
-{
- irq_set_chip_and_handler(irq, &dw_msi_irq_chip, handle_simple_irq);
- irq_set_chip_data(irq, domain->host_data);
-
- return 0;
-}
-
-static const struct irq_domain_ops msi_domain_ops = {
- .map = dw_pcie_msi_map,
-};
-
int dw_pcie_host_init(struct pcie_port *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
dw_chained_msi_isr,
pp);
} else {
- ret = pp->ops->msi_host_init(pp, &dw_pcie_msi_chip);
+ ret = pp->ops->msi_host_init(pp);
if (ret < 0)
goto error;
}
projects / platform / kernel / linux-rpi.git / commitdiff