This is a note to let you know that I've just added the patch titled
PCI: dwc/dra7xx: Use the common MSI irq_chip
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pci-dwc-dra7xx-use-the-common-msi-irq_chip.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit eb79d84adcfd4f527905aa45475665fc4d33bfbe
Author: Rob Herring <robh@xxxxxxxxxx>
Date: Thu Nov 5 15:11:49 2020 -0600
PCI: dwc/dra7xx: Use the common MSI irq_chip
[ Upstream commit 7f170d35f58311362e8b01b6774ca1053c0641b8 ]
The dra7xx MSI irq_chip implementation is identical to the default DWC one.
The only difference is the interrupt handler as the MSI interrupt is muxed
with other interrupts, but that doesn't affect the irq_chip part of it.
Link: https://lore.kernel.org/r/20201105211159.1814485-7-robh@xxxxxxxxxx
Tested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Cc: Kishon Vijay Abraham I <kishon@xxxxxx>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: linux-omap@xxxxxxxxxxxxxxx
Stable-dep-of: 83a939f0fdc2 ("PCI: exynos: Don't discard .remove() callback")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c
index a4aabc85dbb12..4d0c35a4aa598 100644
--- a/drivers/pci/controller/dwc/pci-dra7xx.c
+++ b/drivers/pci/controller/dwc/pci-dra7xx.c
@@ -377,133 +377,8 @@ static int dra7xx_pcie_init_irq_domain(struct pcie_port *pp)
return 0;
}
-static void dra7xx_pcie_setup_msi_msg(struct irq_data *d, struct msi_msg *msg)
-{
- struct pcie_port *pp = irq_data_get_irq_chip_data(d);
- struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- u64 msi_target;
-
- msi_target = (u64)pp->msi_data;
-
- msg->address_lo = lower_32_bits(msi_target);
- msg->address_hi = upper_32_bits(msi_target);
-
- msg->data = d->hwirq;
-
- dev_dbg(pci->dev, "msi#%d address_hi %#x address_lo %#x\n",
- (int)d->hwirq, msg->address_hi, msg->address_lo);
-}
-
-static int dra7xx_pcie_msi_set_affinity(struct irq_data *d,
- const struct cpumask *mask,
- bool force)
-{
- return -EINVAL;
-}
-
-static void dra7xx_pcie_bottom_mask(struct irq_data *d)
-{
- struct pcie_port *pp = irq_data_get_irq_chip_data(d);
- struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- unsigned int res, bit, ctrl;
- unsigned long flags;
-
- raw_spin_lock_irqsave(&pp->lock, flags);
-
- ctrl = d->hwirq / MAX_MSI_IRQS_PER_CTRL;
- res = ctrl * MSI_REG_CTRL_BLOCK_SIZE;
- bit = d->hwirq % MAX_MSI_IRQS_PER_CTRL;
-
- pp->irq_mask[ctrl] |= BIT(bit);
- dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_MASK + res,
- pp->irq_mask[ctrl]);
-
- raw_spin_unlock_irqrestore(&pp->lock, flags);
-}
-
-static void dra7xx_pcie_bottom_unmask(struct irq_data *d)
-{
- struct pcie_port *pp = irq_data_get_irq_chip_data(d);
- struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- unsigned int res, bit, ctrl;
- unsigned long flags;
-
- raw_spin_lock_irqsave(&pp->lock, flags);
-
- ctrl = d->hwirq / MAX_MSI_IRQS_PER_CTRL;
- res = ctrl * MSI_REG_CTRL_BLOCK_SIZE;
- bit = d->hwirq % MAX_MSI_IRQS_PER_CTRL;
-
- pp->irq_mask[ctrl] &= ~BIT(bit);
- dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_MASK + res,
- pp->irq_mask[ctrl]);
-
- raw_spin_unlock_irqrestore(&pp->lock, flags);
-}
-
-static void dra7xx_pcie_bottom_ack(struct irq_data *d)
-{
- struct pcie_port *pp = irq_data_get_irq_chip_data(d);
- struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- unsigned int res, bit, ctrl;
-
- ctrl = d->hwirq / MAX_MSI_IRQS_PER_CTRL;
- res = ctrl * MSI_REG_CTRL_BLOCK_SIZE;
- bit = d->hwirq % MAX_MSI_IRQS_PER_CTRL;
-
- dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_STATUS + res, BIT(bit));
-}
-
-static struct irq_chip dra7xx_pci_msi_bottom_irq_chip = {
- .name = "DRA7XX-PCI-MSI",
- .irq_ack = dra7xx_pcie_bottom_ack,
- .irq_compose_msi_msg = dra7xx_pcie_setup_msi_msg,
- .irq_set_affinity = dra7xx_pcie_msi_set_affinity,
- .irq_mask = dra7xx_pcie_bottom_mask,
- .irq_unmask = dra7xx_pcie_bottom_unmask,
-};
-
-static int dra7xx_pcie_msi_host_init(struct pcie_port *pp)
-{
- struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- struct device *dev = pci->dev;
- u32 ctrl, num_ctrls;
- int ret;
-
- pp->msi_irq_chip = &dra7xx_pci_msi_bottom_irq_chip;
-
- num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL;
- /* Initialize IRQ Status array */
- for (ctrl = 0; ctrl < num_ctrls; ctrl++) {
- pp->irq_mask[ctrl] = ~0;
- 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);
- }
-
- ret = dw_pcie_allocate_domains(pp);
- if (ret)
- return ret;
-
- pp->msi_data = dma_map_single_attrs(dev, &pp->msi_msg,
- sizeof(pp->msi_msg),
- DMA_FROM_DEVICE,
- DMA_ATTR_SKIP_CPU_SYNC);
- ret = dma_mapping_error(dev, pp->msi_data);
- if (ret) {
- dev_err(dev, "Failed to map MSI data\n");
- pp->msi_data = 0;
- dw_pcie_free_msi(pp);
- }
- return ret;
-}
-
static const struct dw_pcie_host_ops dra7xx_pcie_host_ops = {
.host_init = dra7xx_pcie_host_init,
- .msi_host_init = dra7xx_pcie_msi_host_init,
};
static void dra7xx_pcie_ep_init(struct dw_pcie_ep *ep)
