drm/nouveau/intr: add shared interrupt plumbing between pci/tegra

Unifies the handling between PCI-based and Tegra GPUs, and makes more
explicit/obvious where device interrupts can be expected.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>

1 files changed, 9 insertions, 35 deletions

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c
index a7d42ea8ba28..5a0de45d36ce 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c
@@ -26,7 +26,15 @@
 
 #include <core/option.h>
 #include <core/pci.h>
-#include <subdev/mc.h>
+
+void
+nvkm_pci_msi_rearm(struct nvkm_device *device)
+{
+	struct nvkm_pci *pci = device->pci;
+
+	if (pci && pci->msi)
+		pci->func->msi_rearm(pci);
+}
 
 u32
 nvkm_pci_rd32(struct nvkm_pci *pci, u16 addr)
@@ -65,24 +73,6 @@ nvkm_pci_rom_shadow(struct nvkm_pci *pci, bool shadow)
 	nvkm_pci_wr32(pci, 0x0050, data);
 }
 
-static irqreturn_t
-nvkm_pci_intr(int irq, void *arg)
-{
-	struct nvkm_pci *pci = arg;
-	struct nvkm_device *device = pci->subdev.device;
-	bool handled = false;
-
-	if (pci->irq < 0)
-		return IRQ_HANDLED;
-
-	nvkm_mc_intr_unarm(device);
-	if (pci->msi)
-		pci->func->msi_rearm(pci);
-	nvkm_mc_intr(device, &handled);
-	nvkm_mc_intr_rearm(device);
-	return handled ? IRQ_HANDLED : IRQ_NONE;
-}
-
 static int
 nvkm_pci_fini(struct nvkm_subdev *subdev, bool suspend)
 {
@@ -107,7 +97,6 @@ static int
 nvkm_pci_oneinit(struct nvkm_subdev *subdev)
 {
 	struct nvkm_pci *pci = nvkm_pci(subdev);
-	struct pci_dev *pdev = pci->pdev;
 	int ret;
 
 	if (pci_is_pcie(pci->pdev)) {
@@ -116,11 +105,6 @@ nvkm_pci_oneinit(struct nvkm_subdev *subdev)
 			return ret;
 	}
 
-	ret = request_irq(pdev->irq, nvkm_pci_intr, IRQF_SHARED, "nvkm", pci);
-	if (ret)
-		return ret;
-
-	pci->irq = pdev->irq;
 	return 0;
 }
 
@@ -157,15 +141,6 @@ nvkm_pci_dtor(struct nvkm_subdev *subdev)
 
 	nvkm_agp_dtor(pci);
 
-	if (pci->irq >= 0) {
-		/* freq_irq() will call the handler, we use pci->irq == -1
-		 * to signal that it's been torn down and should be a noop.
-		 */
-		int irq = pci->irq;
-		pci->irq = -1;
-		free_irq(irq, pci);
-	}
-
 	if (pci->msi)
 		pci_disable_msi(pci->pdev);
 
@@ -192,7 +167,6 @@ nvkm_pci_new_(const struct nvkm_pci_func *func, struct nvkm_device *device,
 	nvkm_subdev_ctor(&nvkm_pci_func, device, type, inst, &pci->subdev);
 	pci->func = func;
 	pci->pdev = device->func->pci(device)->pdev;
-	pci->irq = -1;
 	pci->pcie.speed = -1;
 	pci->pcie.width = -1;