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-rw-r--r--meta-agl-jailhouse/recipes-kernel/linux/linux/0017-ivshmem-net-Enable-INTx.patch55
1 files changed, 55 insertions, 0 deletions
diff --git a/meta-agl-jailhouse/recipes-kernel/linux/linux/0017-ivshmem-net-Enable-INTx.patch b/meta-agl-jailhouse/recipes-kernel/linux/linux/0017-ivshmem-net-Enable-INTx.patch
new file mode 100644
index 00000000..e0f4be44
--- /dev/null
+++ b/meta-agl-jailhouse/recipes-kernel/linux/linux/0017-ivshmem-net-Enable-INTx.patch
@@ -0,0 +1,55 @@
+From 9683ab979a373932e9c332d2db8115b6c23303d0 Mon Sep 17 00:00:00 2001
+From: Jan Kiszka <jan.kiszka@siemens.com>
+Date: Sun, 27 Nov 2016 15:15:51 +0100
+Subject: [PATCH 17/32] ivshmem-net: Enable INTx
+
+Activate INTx notification when it has to be used instead of MSI-X,
+disable it after use.
+
+Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
+---
+ drivers/net/ivshmem-net.c | 7 ++++++-
+ 1 file changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/net/ivshmem-net.c b/drivers/net/ivshmem-net.c
+index ccef65d0f038..591d04195e57 100644
+--- a/drivers/net/ivshmem-net.c
++++ b/drivers/net/ivshmem-net.c
+@@ -31,6 +31,8 @@
+ #define JAILHOUSE_CFG_SHMEM_PTR 0x40
+ #define JAILHOUSE_CFG_SHMEM_SZ 0x48
+
++#define IVSHMEM_INTX_ENABLE 0x1
++
+ #define IVSHM_NET_STATE_RESET 0
+ #define IVSHM_NET_STATE_INIT 1
+ #define IVSHM_NET_STATE_READY 2
+@@ -47,7 +49,7 @@
+ #define IVSHM_NET_VQ_ALIGN 64
+
+ struct ivshmem_regs {
+- u32 imask;
++ u32 intxctrl;
+ u32 istat;
+ u32 ivpos;
+ u32 doorbell;
+@@ -869,6 +871,8 @@ static int ivshm_net_probe(struct pci_dev *pdev,
+ goto err_int;
+
+ pci_set_master(pdev);
++ if (!in->using_msix)
++ writel(IVSHMEM_INTX_ENABLE, &in->ivshm_regs->intxctrl);
+
+ writel(IVSHM_NET_STATE_RESET, &in->ivshm_regs->lstate);
+
+@@ -895,6 +899,7 @@ static void ivshm_net_remove(struct pci_dev *pdev)
+ free_irq(in->msix.vector, ndev);
+ pci_disable_msix(pdev);
+ } else {
++ writel(0, &in->ivshm_regs->intxctrl);
+ free_irq(pdev->irq, ndev);
+ }
+
+--
+2.11.0
+