Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752133AbaDYHVR (ORCPT ); Fri, 25 Apr 2014 03:21:17 -0400 Received: from hqemgate14.nvidia.com ([216.228.121.143]:4777 "EHLO hqemgate14.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751782AbaDYHU1 (ORCPT ); Fri, 25 Apr 2014 03:20:27 -0400 X-PGP-Universal: processed; by hqnvupgp08.nvidia.com on Fri, 25 Apr 2014 00:14:54 -0700 From: Alexandre Courbot To: Ben Skeggs CC: Thierry Reding , , , , , , Alexandre Courbot Subject: [PATCH v3 3/9] drm/nouveau/ibus: add GK20A support Date: Fri, 25 Apr 2014 16:19:50 +0900 Message-ID: <1398410396-23338-4-git-send-email-acourbot@nvidia.com> X-Mailer: git-send-email 1.9.2 In-Reply-To: <1398410396-23338-1-git-send-email-acourbot@nvidia.com> References: <1398410396-23338-1-git-send-email-acourbot@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add support for initializing the priv ring of GK20A. This is done by the BIOS on desktop GPUs, but needs to be done by hand on Tegra. Signed-off-by: Alexandre Courbot --- drivers/gpu/drm/nouveau/Makefile | 1 + drivers/gpu/drm/nouveau/core/include/subdev/ibus.h | 1 + drivers/gpu/drm/nouveau/core/subdev/ibus/gk20a.c | 103 +++++++++++++++++++++ 3 files changed, 105 insertions(+) create mode 100644 drivers/gpu/drm/nouveau/core/subdev/ibus/gk20a.c diff --git a/drivers/gpu/drm/nouveau/Makefile b/drivers/gpu/drm/nouveau/Makefile index b7d216264775..bc5fb24630e6 100644 --- a/drivers/gpu/drm/nouveau/Makefile +++ b/drivers/gpu/drm/nouveau/Makefile @@ -136,6 +136,7 @@ nouveau-y += core/subdev/i2c/nv94.o nouveau-y += core/subdev/i2c/nvd0.o nouveau-y += core/subdev/ibus/nvc0.o nouveau-y += core/subdev/ibus/nve0.o +nouveau-y += core/subdev/ibus/gk20a.o nouveau-y += core/subdev/instmem/base.o nouveau-y += core/subdev/instmem/nv04.o nouveau-y += core/subdev/instmem/nv40.o diff --git a/drivers/gpu/drm/nouveau/core/include/subdev/ibus.h b/drivers/gpu/drm/nouveau/core/include/subdev/ibus.h index 88814f159d89..31df634c0fdc 100644 --- a/drivers/gpu/drm/nouveau/core/include/subdev/ibus.h +++ b/drivers/gpu/drm/nouveau/core/include/subdev/ibus.h @@ -30,5 +30,6 @@ nouveau_ibus(void *obj) extern struct nouveau_oclass nvc0_ibus_oclass; extern struct nouveau_oclass nve0_ibus_oclass; +extern struct nouveau_oclass gk20a_ibus_oclass; #endif diff --git a/drivers/gpu/drm/nouveau/core/subdev/ibus/gk20a.c b/drivers/gpu/drm/nouveau/core/subdev/ibus/gk20a.c new file mode 100644 index 000000000000..245f0ebaa6af --- /dev/null +++ b/drivers/gpu/drm/nouveau/core/subdev/ibus/gk20a.c @@ -0,0 +1,103 @@ +/* + * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#include +#include + +struct gk20a_ibus_priv { + struct nouveau_ibus base; +}; + +static void +gk20a_ibus_init_priv_ring(struct gk20a_ibus_priv *priv) +{ + nv_mask(priv, 0x137250, 0x3f, 0); + + nv_mask(priv, 0x000200, 0x20, 0); + usleep_range(20, 30); + nv_mask(priv, 0x000200, 0x20, 0x20); + + nv_wr32(priv, 0x12004c, 0x4); + nv_wr32(priv, 0x122204, 0x2); + nv_rd32(priv, 0x122204); +} + +static void +gk20a_ibus_intr(struct nouveau_subdev *subdev) +{ + struct gk20a_ibus_priv *priv = (void *)subdev; + u32 status0 = nv_rd32(priv, 0x120058); + + if (status0 & 0x7) { + nv_debug(priv, "resetting priv ring\n"); + gk20a_ibus_init_priv_ring(priv); + } + + /* Acknowledge interrupt */ + nv_mask(priv, 0x12004c, 0x2, 0x2); + + if (!nv_wait(subdev, 0x12004c, 0x3f, 0x00)) + nv_warn(priv, "timeout waiting for ringmaster ack\n"); +} + +static int +gk20a_ibus_init(struct nouveau_object *object) +{ + struct gk20a_ibus_priv *priv = (void *)object; + int ret; + + ret = _nouveau_ibus_init(object); + if (ret) + return ret; + + gk20a_ibus_init_priv_ring(priv); + + return 0; +} + +static int +gk20a_ibus_ctor(struct nouveau_object *parent, struct nouveau_object *engine, + struct nouveau_oclass *oclass, void *data, u32 size, + struct nouveau_object **pobject) +{ + struct gk20a_ibus_priv *priv; + int ret; + + ret = nouveau_ibus_create(parent, engine, oclass, &priv); + *pobject = nv_object(priv); + if (ret) + return ret; + + nv_subdev(priv)->intr = gk20a_ibus_intr; + return 0; +} + +struct nouveau_oclass +gk20a_ibus_oclass = { + .handle = NV_SUBDEV(IBUS, 0xea), + .ofuncs = &(struct nouveau_ofuncs) { + .ctor = gk20a_ibus_ctor, + .dtor = _nouveau_ibus_dtor, + .init = gk20a_ibus_init, + .fini = _nouveau_ibus_fini, + }, +}; -- 1.9.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/