diff mbox

[v4,5/5] PCI: designware: set up high part of MSI target address

Message ID 1439809578-13654-6-git-send-email-l.stach@pengutronix.de (mailing list archive)
State New, archived
Delegated to: Bjorn Helgaas
Headers show

Commit Message

Lucas Stach Aug. 17, 2015, 11:06 a.m. UTC 
Set up the high part of the MSI target address in order to allow the
MSI target to reside above the 4GB mark on 64bit and PAE systems.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
---
v4: fix target address setup in dw_pcie_msi_init()
---
 drivers/pci/host/pcie-designware.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

Comments

Pratyush Anand Aug. 18, 2015, 3:52 a.m. UTC | #1 
On Mon, Aug 17, 2015 at 4:36 PM, Lucas Stach <l.stach@pengutronix.de> wrote:
> Set up the high part of the MSI target address in order to allow the
> MSI target to reside above the 4GB mark on 64bit and PAE systems.
>
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

Acked-by: Pratyush Anand <pratyush.anand@gmail.com>
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diff mbox

Patch

diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index 74034395cf2a..71629175d1a1 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -205,12 +205,16 @@  irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
 
 void dw_pcie_msi_init(struct pcie_port *pp)
 {
+	u64 msi_target;
+
 	pp->msi_data = __get_free_pages(GFP_KERNEL, 0);
+	msi_target = virt_to_phys((void *)pp->msi_data);
 
 	/* program the msi_data */
 	dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4,
-			virt_to_phys((void *)pp->msi_data));
-	dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4, 0);
+			    (u32)(msi_target & 0xffffffff));
+	dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4,
+			    (u32)(msi_target >> 32 & 0xffffffff));
 }
 
 static void dw_pcie_msi_clear_irq(struct pcie_port *pp, int irq)
@@ -299,12 +303,15 @@  no_valid_irq:
 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)
-		msg.address_lo = pp->ops->get_msi_addr(pp);
+		msi_target = pp->ops->get_msi_addr(pp);
 	else
-		msg.address_lo = virt_to_phys((void *)pp->msi_data);
-	msg.address_hi = 0x0;
+		msi_target = virt_to_phys((void *)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);