From ca97a36698ca3f76d3cee542e69dcf1b66210b0c Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Mon, 13 May 2013 21:13:15 +1000 Subject: [PATCH] drm/nv50-/vm: take mutex rather than irqsave spinlock These operations can take quite some time, and we really don't want to have to hold a spinlock for too long. Now that the lock ordering for vm and the gr/nv84 hw bug workaround has been reversed, it's possible to use a mutex here. Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/core/subdev/vm/nv50.c | 7 ++----- drivers/gpu/drm/nouveau/core/subdev/vm/nvc0.c | 7 ++----- 2 files changed, 4 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/nouveau/core/subdev/vm/nv50.c b/drivers/gpu/drm/nouveau/core/subdev/vm/nv50.c index 966e614..50c6612 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/vm/nv50.c +++ b/drivers/gpu/drm/nouveau/core/subdev/vm/nv50.c @@ -31,7 +31,6 @@ struct nv50_vmmgr_priv { struct nouveau_vmmgr base; - spinlock_t lock; }; static void @@ -153,10 +152,9 @@ nv50_vm_flush(struct nouveau_vm *vm) { struct nv50_vmmgr_priv *priv = (void *)vm->vmm; struct nouveau_engine *engine; - unsigned long flags; int i, vme; - spin_lock_irqsave(&priv->lock, flags); + mutex_lock(&nv_subdev(priv)->mutex); for (i = 0; i < NVDEV_SUBDEV_NR; i++) { if (!atomic_read(&vm->engref[i])) continue; @@ -182,7 +180,7 @@ nv50_vm_flush(struct nouveau_vm *vm) if (!nv_wait(priv, 0x100c80, 0x00000001, 0x00000000)) nv_error(priv, "vm flush timeout: engine %d\n", vme); } - spin_unlock_irqrestore(&priv->lock, flags); + mutex_unlock(&nv_subdev(priv)->mutex); } static int @@ -220,7 +218,6 @@ nv50_vmmgr_ctor(struct nouveau_object *parent, struct nouveau_object *engine, priv->base.map_sg = nv50_vm_map_sg; priv->base.unmap = nv50_vm_unmap; priv->base.flush = nv50_vm_flush; - spin_lock_init(&priv->lock); return 0; } diff --git a/drivers/gpu/drm/nouveau/core/subdev/vm/nvc0.c b/drivers/gpu/drm/nouveau/core/subdev/vm/nvc0.c index 4c3b0a2..beb0974 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/vm/nvc0.c +++ b/drivers/gpu/drm/nouveau/core/subdev/vm/nvc0.c @@ -32,7 +32,6 @@ struct nvc0_vmmgr_priv { struct nouveau_vmmgr base; - spinlock_t lock; }; @@ -164,12 +163,11 @@ void nvc0_vm_flush_engine(struct nouveau_subdev *subdev, u64 addr, int type) { struct nvc0_vmmgr_priv *priv = (void *)nouveau_vmmgr(subdev); - unsigned long flags; /* looks like maybe a "free flush slots" counter, the * faster you write to 0x100cbc to more it decreases */ - spin_lock_irqsave(&priv->lock, flags); + mutex_lock(&nv_subdev(priv)->mutex); if (!nv_wait_ne(subdev, 0x100c80, 0x00ff0000, 0x00000000)) { nv_error(subdev, "vm timeout 0: 0x%08x %d\n", nv_rd32(subdev, 0x100c80), type); @@ -183,7 +181,7 @@ nvc0_vm_flush_engine(struct nouveau_subdev *subdev, u64 addr, int type) nv_error(subdev, "vm timeout 1: 0x%08x %d\n", nv_rd32(subdev, 0x100c80), type); } - spin_unlock_irqrestore(&priv->lock, flags); + mutex_unlock(&nv_subdev(priv)->mutex); } static void @@ -227,7 +225,6 @@ nvc0_vmmgr_ctor(struct nouveau_object *parent, struct nouveau_object *engine, priv->base.map_sg = nvc0_vm_map_sg; priv->base.unmap = nvc0_vm_unmap; priv->base.flush = nvc0_vm_flush; - spin_lock_init(&priv->lock); return 0; } -- 2.7.4