diff options
| author | Lucas Stach <dev@lynxeye.de> | 2013-08-28 00:00:50 (GMT) |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2013-09-04 03:48:23 (GMT) |
| commit | a27e56996687e79416d69a7e6dc26f9d8fe06059 (patch) | |
| tree | 4bd0338da3740423ebe98f48ad2e77cbd5766baa /drivers | |
| parent | 4b31ebcf69a48d5d70cf26cea080bd0818fdd9af (diff) | |
| download | linux-a27e56996687e79416d69a7e6dc26f9d8fe06059.tar.xz | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/include/subdev/mc.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/os.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/mc/base.c | 24 |
3 files changed, 25 insertions, 1 deletions
diff --git a/drivers/gpu/drm/nouveau/core/include/subdev/mc.h b/drivers/gpu/drm/nouveau/core/include/subdev/mc.h index 9d2cd20..ce6569f 100644 --- a/drivers/gpu/drm/nouveau/core/include/subdev/mc.h +++ b/drivers/gpu/drm/nouveau/core/include/subdev/mc.h @@ -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 * diff --git a/drivers/gpu/drm/nouveau/core/os.h b/drivers/gpu/drm/nouveau/core/os.h index d48683a..191e739 100644 --- a/drivers/gpu/drm/nouveau/core/os.h +++ b/drivers/gpu/drm/nouveau/core/os.h @@ -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> diff --git a/drivers/gpu/drm/nouveau/core/subdev/mc/base.c b/drivers/gpu/drm/nouveau/core/subdev/mc/base.c index 20f9a53..37712a6 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/mc/base.c +++ b/drivers/gpu/drm/nouveau/core/subdev/mc/base.c @@ -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) |