PCI: dwc: Fix dw_pcie_ep_raise_msix_irq() to get correct MSI-X table address

commit beb4641a787d ("PCI: dwc: Add MSI-X callbacks handler"),
in order to raise MSI-X interrupt, obtained MSIX table address from
Base Address Register (BAR). However BAR only holds PCI address
programmed by the host whereas the MSI-X table should be in the local
memory.

Store the MSI-X table address (virtual address) as part of ->set_bar()
callback and use that to get the message address and message data
here.

Fixes: beb4641a787d ("PCI: dwc: Add MSI-X callbacks handler")
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h
index 0c628e30c582..6644ff3b0702 100644
--- a/include/linux/pci-epf.h
+++ b/include/linux/pci-epf.h
@@ -94,10 +94,12 @@ struct pci_epf_driver {
 /**
  * struct pci_epf_bar - represents the BAR of EPF device
  * @phys_addr: physical address that should be mapped to the BAR
+ * @addr: virtual address corresponding to the @phys_addr
  * @size: the size of the address space present in BAR
  */
 struct pci_epf_bar {
 	dma_addr_t	phys_addr;
+	void		*addr;
 	size_t		size;
 	enum pci_barno	barno;
 	int		flags;
@@ -134,6 +136,19 @@ struct pci_epf {
 	struct mutex		lock;
 };
 
+/**
+ * struct pci_epf_msix_tbl - represents the MSIX table entry structure
+ * @msg_addr: Writes to this address will trigger MSIX interrupt in host
+ * @msg_data: Data that should be written to @msg_addr to trigger MSIX interrupt
+ * @vector_ctrl: Identifies if the function is prohibited from sending a message
+ * using this MSIX table entry
+ */
+struct pci_epf_msix_tbl {
+	u64 msg_addr;
+	u32 msg_data;
+	u32 vector_ctrl;
+};
+
 #define to_pci_epf(epf_dev) container_of((epf_dev), struct pci_epf, dev)
 
 #define pci_epf_register_driver(driver)    \