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authorArindam Nath <arindam.nath@amd.com>2020-02-05 21:24:20 +0530
committerJon Mason <jdmason@kudzu.us>2020-03-13 10:04:19 -0400
commit8a7cedef441f56bcbdd0a0e70f73510ffb72dc5d (patch)
treec85095b7ced48e530ec3083e68f82d1db703c932 /drivers/ntb
parent52ba447889643ea25545c521e653f956b2480489 (diff)
downloadlinux-8a7cedef441f56bcbdd0a0e70f73510ffb72dc5d.tar.bz2
NTB: Enable link up and down event notification
Link-Up and Link-Down events can occur irrespective of whether a data transfer is in progress or not. So we need to enable the interrupt delivery for these events early during driver load. Signed-off-by: Arindam Nath <arindam.nath@amd.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'drivers/ntb')
-rw-r--r--drivers/ntb/hw/amd/ntb_hw_amd.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/ntb/hw/amd/ntb_hw_amd.c b/drivers/ntb/hw/amd/ntb_hw_amd.c
index 150e4db11485..111f33ff2bd7 100644
--- a/drivers/ntb/hw/amd/ntb_hw_amd.c
+++ b/drivers/ntb/hw/amd/ntb_hw_amd.c
@@ -994,6 +994,7 @@ static enum ntb_topo amd_get_topo(struct amd_ntb_dev *ndev)
static int amd_init_dev(struct amd_ntb_dev *ndev)
{
+ void __iomem *mmio = ndev->self_mmio;
struct pci_dev *pdev;
int rc = 0;
@@ -1015,6 +1016,10 @@ static int amd_init_dev(struct amd_ntb_dev *ndev)
ndev->db_valid_mask = BIT_ULL(ndev->db_count) - 1;
+ /* Enable Link-Up and Link-Down event interrupts */
+ ndev->int_mask &= ~(AMD_LINK_UP_EVENT | AMD_LINK_DOWN_EVENT);
+ writel(ndev->int_mask, mmio + AMD_INTMASK_OFFSET);
+
return 0;
}