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drm/nouveau: use MSI interrupts 

MSIs were only problematic on some old, broken chipsets. But now that we
already see systems where PCI legacy interrupts are somewhat flaky, it's
really time to move to MSIs.

v2 (Ben Skeggs): blacklist BR02 boards

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Lucas Stach 2013-08-28 02:00:50 +02:00 committed by Ben Skeggs
parent 4b31ebcf69
commit a27e569966
3 changed files with 25 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/nouveau/core/include/subdev/mc.h
View File

@ -12,6 +12,7 @@ struct nouveau_mc_intr {
struct nouveau_mc {
struct nouveau_subdev base;
const struct nouveau_mc_intr *intr_map;
bool use_msi;
};
static inline struct nouveau_mc *

1
drivers/gpu/drm/nouveau/core/os.h
View File

@ -19,6 +19,7 @@
#include <linux/reboot.h>
#include <linux/interrupt.h>
#include <linux/log2.h>
#include <linux/pm_runtime.h>
#include <asm/unaligned.h>

24
drivers/gpu/drm/nouveau/core/subdev/mc/base.c
View File

@ -23,7 +23,7 @@
*/
#include <subdev/mc.h>
#include <linux/pm_runtime.h>
#include <core/option.h>
static irqreturn_t
nouveau_mc_intr(int irq, void *arg)
@ -47,6 +47,9 @@ nouveau_mc_intr(int irq, void *arg)
map++;
}
if (pmc->use_msi)
nv_wr08(pmc->base.base.parent, 0x00088068, 0xff);
if (intr) {
nv_error(pmc, "unknown intr 0x%08x\n", stat);
}
@ -81,6 +84,8 @@ _nouveau_mc_dtor(struct nouveau_object *object)
struct nouveau_device *device = nv_device(object);
struct nouveau_mc *pmc = (void *)object;
free_irq(device->pdev->irq, pmc);
if (pmc->use_msi)
pci_disable_msi(device->pdev);
nouveau_subdev_destroy(&pmc->base);
}
@ -102,6 +107,23 @@ nouveau_mc_create_(struct nouveau_object *parent, struct nouveau_object *engine,
pmc->intr_map = intr_map;
switch (device->pdev->device & 0x0ff0) {
case 0x00f0: /* BR02? */
case 0x02e0: /* BR02? */
pmc->use_msi = false;
break;
default:
pmc->use_msi = nouveau_boolopt(device->cfgopt, "NvMSI", true);
if (pmc->use_msi) {
pmc->use_msi = pci_enable_msi(device->pdev) == 0;
if (pmc->use_msi) {
nv_info(pmc, "MSI interrupts enabled\n");
nv_wr08(device, 0x00088068, 0xff);
}
}
break;
}
ret = request_irq(device->pdev->irq, nouveau_mc_intr,
IRQF_SHARED, "nouveau", pmc);
if (ret < 0)