[PATCH v2 04/10] drm/nouveau/fb: add GK20A support

Alexandre Courbot
2014-04-21T06:04:05Z

Add a simple FB device for GK20A, as well as a RAM implementation based
on contiguous DMA memory allocations suitable for chips that use system
memory as video RAM.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
---
drivers/gpu/drm/nouveau/Makefile | 2 +
drivers/gpu/drm/nouveau/core/include/subdev/fb.h | 1 +
drivers/gpu/drm/nouveau/core/subdev/fb/gk20a.c | 56 ++++++++
drivers/gpu/drm/nouveau/core/subdev/fb/priv.h | 1 +
drivers/gpu/drm/nouveau/core/subdev/fb/ramgk20a.c | 168 ++++++++++++++++++++++
5 files changed, 228 insertions(+)
create mode 100644 drivers/gpu/drm/nouveau/core/subdev/fb/gk20a.c
create mode 100644 drivers/gpu/drm/nouveau/core/subdev/fb/ramgk20a.c

diff --git a/drivers/gpu/drm/nouveau/Makefile b/drivers/gpu/drm/nouveau/Makefile
index bc5fb24630e6..34fef246e779 100644
--- a/drivers/gpu/drm/nouveau/Makefile
+++ b/drivers/gpu/drm/nouveau/Makefile
@@ -102,6 +102,7 @@ nouveau-y += core/subdev/fb/nvaa.o
nouveau-y += core/subdev/fb/nvaf.o
nouveau-y += core/subdev/fb/nvc0.o
nouveau-y += core/subdev/fb/nve0.o
+nouveau-y += core/subdev/fb/gk20a.o
nouveau-y += core/subdev/fb/gm107.o
nouveau-y += core/subdev/fb/ramnv04.o
nouveau-y += core/subdev/fb/ramnv10.o
@@ -117,6 +118,7 @@ nouveau-y += core/subdev/fb/ramnva3.o
nouveau-y += core/subdev/fb/ramnvaa.o
nouveau-y += core/subdev/fb/ramnvc0.o
nouveau-y += core/subdev/fb/ramnve0.o
+nouveau-y += core/subdev/fb/ramgk20a.o
nouveau-y += core/subdev/fb/ramgm107.o
nouveau-y += core/subdev/fb/sddr3.o
nouveau-y += core/subdev/fb/gddr5.o
diff --git a/drivers/gpu/drm/nouveau/core/include/subdev/fb.h b/drivers/gpu/drm/nouveau/core/include/subdev/fb.h
index 58c7ccdebb01..871e73914b24 100644
--- a/drivers/gpu/drm/nouveau/core/include/subdev/fb.h
+++ b/drivers/gpu/drm/nouveau/core/include/subdev/fb.h
@@ -105,6 +105,7 @@ extern struct nouveau_oclass *nvaa_fb_oclass;
extern struct nouveau_oclass *nvaf_fb_oclass;
extern struct nouveau_oclass *nvc0_fb_oclass;
extern struct nouveau_oclass *nve0_fb_oclass;
+extern struct nouveau_oclass *gk20a_fb_oclass;
extern struct nouveau_oclass *gm107_fb_oclass;

#include <subdev/bios/ramcfg.h>
diff --git a/drivers/gpu/drm/nouveau/core/subdev/fb/gk20a.c b/drivers/gpu/drm/nouveau/core/subdev/fb/gk20a.c
new file mode 100644
index 000000000000..a16024a74771
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/core/subdev/fb/gk20a.c
@@ -0,0 +1,56 @@
+/*
+ * 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 "nvc0.h"
+
+struct gk20a_fb_priv {
+ struct nouveau_fb base;
+};
+
+static int
+gk20a_fb_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
+ struct nouveau_oclass *oclass, void *data, u32 size,
+ struct nouveau_object **pobject)
+{
+ struct gk20a_fb_priv *priv;
+ int ret;
+
+ ret = nouveau_fb_create(parent, engine, oclass, &priv);
+ *pobject = nv_object(priv);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+struct nouveau_oclass *
+gk20a_fb_oclass = &(struct nouveau_fb_impl) {
+ .base.handle = NV_SUBDEV(FB, 0xea),
+ .base.ofuncs = &(struct nouveau_ofuncs) {
+ .ctor = gk20a_fb_ctor,
+ .dtor = _nouveau_fb_dtor,
+ .init = _nouveau_fb_init,
+ .fini = _nouveau_fb_fini,
+ },
+ .memtype = nvc0_fb_memtype_valid,
+ .ram = &gk20a_ram_oclass,
+}.base;
diff --git a/drivers/gpu/drm/nouveau/core/subdev/fb/priv.h b/drivers/gpu/drm/nouveau/core/subdev/fb/priv.h
index da74c889aed4..82273f832e42 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/fb/priv.h
+++ b/drivers/gpu/drm/nouveau/core/subdev/fb/priv.h
@@ -32,6 +32,7 @@ extern struct nouveau_oclass nva3_ram_oclass;
extern struct nouveau_oclass nvaa_ram_oclass;
extern struct nouveau_oclass nvc0_ram_oclass;
extern struct nouveau_oclass nve0_ram_oclass;
+extern struct nouveau_oclass gk20a_ram_oclass;
extern struct nouveau_oclass gm107_ram_oclass;

int nouveau_sddr3_calc(struct nouveau_ram *ram);
diff --git a/drivers/gpu/drm/nouveau/core/subdev/fb/ramgk20a.c b/drivers/gpu/drm/nouveau/core/subdev/fb/ramgk20a.c
new file mode 100644
index 000000000000..7e9938e04f07
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/core/subdev/fb/ramgk20a.c
@@ -0,0 +1,168 @@
+/*
+ * 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 "priv.h"
+
+#include <subdev/fb.h>
+
+#include <linux/mm.h>
+#include <linux/types.h>
+#include <linux/dma-contiguous.h>
+
+static void
+gk20a_ram_put(struct nouveau_fb *pfb, struct nouveau_mem **pmem)
+{
+ struct device *dev = nv_device_base(nv_device(pfb));
+ struct nouveau_mem *mem = *pmem;
+ int i;
+
+ *pmem = NULL;
+
+ for (i = 0; i < mem->size; i++) {
+ struct page *page;
+
+ if (mem->pages[i] == 0)
+ break;
+
+ page = pfn_to_page(dma_to_pfn(dev, mem->pages[i]));
+ dma_release_from_contiguous(dev, page, 1);
+ }
+
+ kfree(mem->pages);
+ kfree(mem);
+}
+
+static int
+gk20a_ram_get(struct nouveau_fb *pfb, u64 size, u32 align, u32 ncmin,
+ u32 memtype, struct nouveau_mem **pmem)
+{
+ struct device *dev = nv_device_base(nv_device(pfb));
+ struct nouveau_mem *mem;
+ int type = memtype & 0xff;
+ dma_addr_t dma_addr;
+ int npages;
+ int order;
+ int i;
+
+ nv_debug(pfb, "%s: size: %llx align: %x, ncmin: %x\n", __func__, size,
+ align, ncmin);
+
+ npages = size >> PAGE_SHIFT;
+ if (npages == 0)
+ npages = 1;
+
+ if (align == 0)
+ align = PAGE_SIZE;
+ align >>= PAGE_SHIFT;
+
+ /* round alignment to the next power of 2, if needed */
+ order = fls(align);
+ if ((align & (align - 1)) == 0)
+ order--;
+
+ ncmin >>= PAGE_SHIFT;
+ /*
+ * allocate pages by chunks of "align" size, otherwise we may leave
+ * holes in the contiguous memory area.
+ */
+ if (ncmin == 0)
+ ncmin = npages;
+ else if (align > ncmin)
+ ncmin = align;
+
+ mem = kzalloc(sizeof(*mem), GFP_KERNEL);
+ if (!mem)
+ return -ENOMEM;
+
+ mem->size = npages;
+ mem->memtype = type;
+
+ mem->pages = kzalloc(sizeof(dma_addr_t) * npages, GFP_KERNEL);
+ if (!mem) {
+ kfree(mem);
+ return -ENOMEM;
+ }
+
+ while (npages) {
+ struct page *pages;
+ int pos = 0;
+
+ /* don't overflow in case size is not a multiple of ncmin */
+ if (ncmin > npages)
+ ncmin = npages;
+
+ pages = dma_alloc_from_contiguous(dev, ncmin, order);
+ if (!pages) {
+ gk20a_ram_put(pfb, &mem);
+ return -ENOMEM;
+ }
+
+ dma_addr = pfn_to_dma(nv_device_base(nv_device(pfb)),
+ page_to_pfn(pages));
+
+ nv_debug(pfb, " alloc count: %x, order: %x, addr: %x\n", ncmin,
+ order, dma_addr);
+
+ for (i = 0; i < ncmin; i++)
+ mem->pages[pos + i] = dma_addr + (PAGE_SIZE * i);
+
+ pos += ncmin;
+ npages -= ncmin;
+ }
+
+ mem->offset = (u64)mem->pages[0];
+
+ *pmem = mem;
+
+ return 0;
+}
+
+static int
+gk20a_ram_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
+ struct nouveau_oclass *oclass, void *data, u32 datasize,
+ struct nouveau_object **pobject)
+{
+ struct nouveau_ram *ram;
+ int ret;
+
+ ret = nouveau_ram_create(parent, engine, oclass, &ram);
+ *pobject = nv_object(ram);
+ if (ret)
+ return ret;
+ ram->type = NV_MEM_TYPE_STOLEN;
+ ram->size = get_num_physpages() << PAGE_SHIFT;
+
+ ram->get = gk20a_ram_get;
+ ram->put = gk20a_ram_put;
+
+ return 0;
+}
+
+struct nouveau_oclass
+gk20a_ram_oclass = {
+ .ofuncs = &(struct nouveau_ofuncs) {
+ .ctor = gk20a_ram_ctor,
+ .dtor = _nouveau_ram_dtor,
+ .init = _nouveau_ram_init,
+ .fini = _nouveau_ram_fini,
+ },
+};
--
1.9.2