1 files changed, 322 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/falcon/base.c b/drivers/gpu/drm/nouveau/nvkm/falcon/base.c
new file mode 100644
index 000000000..235149f73
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/falcon/base.c
@@ -0,0 +1,322 @@
+/*
+ * Copyright (c) 2016, 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/mc.h>
+#include <subdev/timer.h>
+#include <subdev/top.h>
+
+static const struct nvkm_falcon_func_dma *
+nvkm_falcon_dma(struct nvkm_falcon *falcon, enum nvkm_falcon_mem *mem_type, u32 *mem_base)
+{
+	switch (*mem_type) {
+	case IMEM: return falcon->func->imem_dma;
+	case DMEM: return falcon->func->dmem_dma;
+	default:
+		return NULL;
+	}
+}
+
+int
+nvkm_falcon_dma_wr(struct nvkm_falcon *falcon, const u8 *img, u64 dma_addr, u32 dma_base,
+		   enum nvkm_falcon_mem mem_type, u32 mem_base, int len, bool sec)
+{
+	const struct nvkm_falcon_func_dma *dma = nvkm_falcon_dma(falcon, &mem_type, &mem_base);
+	const char *type = nvkm_falcon_mem(mem_type);
+	const int dmalen = 256;
+	u32 dma_start = 0;
+	u32 dst, src, cmd;
+	int ret, i;
+
+	if (WARN_ON(!dma->xfer))
+		return -EINVAL;
+
+	if (mem_type == DMEM) {
+		dma_start = dma_base;
+		dma_addr += dma_base;
+	}
+
+	FLCN_DBG(falcon, "%s %08x <- %08x bytes at %08x (%010llx %08x)",
+		 type, mem_base, len, dma_base, dma_addr - dma_base, dma_start);
+	if (WARN_ON(!len || (len & (dmalen - 1))))
+		return -EINVAL;
+
+	ret = dma->init(falcon, dma_addr, dmalen, mem_type, sec, &cmd);
+	if (ret)
+		return ret;
+
+	dst = mem_base;
+	src = dma_base;
+	if (len) {
+		while (len >= dmalen) {
+			dma->xfer(falcon, dst, src - dma_start, cmd);
+
+			if (img && nvkm_printk_ok(falcon->owner, falcon->user, NV_DBG_TRACE)) {
+				for (i = 0; i < dmalen; i += 4, mem_base += 4) {
+					const int w = 8, x = (i / 4) % w;
+
+					if (x == 0)
+						printk(KERN_INFO "%s %08x <-", type, mem_base);
+					printk(KERN_CONT " %08x", *(u32 *)(img + src + i));
+					if (x == (w - 1) || ((i + 4) == dmalen))
+						printk(KERN_CONT " <- %08x+%08x", dma_base,
+						       src + i - dma_base - (x * 4));
+					if (i == (7 * 4))
+						printk(KERN_CONT " *");
+				}
+			}
+
+			if (nvkm_msec(falcon->owner->device, 2000,
+				if (dma->done(falcon))
+					break;
+			) < 0)
+				return -ETIMEDOUT;
+
+			src += dmalen;
+			dst += dmalen;
+			len -= dmalen;
+		}
+		WARN_ON(len);
+	}
+
+	return 0;
+}
+
+static const struct nvkm_falcon_func_pio *
+nvkm_falcon_pio(struct nvkm_falcon *falcon, enum nvkm_falcon_mem *mem_type, u32 *mem_base)
+{
+	switch (*mem_type) {
+	case IMEM:
+		return falcon->func->imem_pio;
+	case DMEM:
+		if (!falcon->func->emem_addr || *mem_base < falcon->func->emem_addr)
+			return falcon->func->dmem_pio;
+
+		*mem_base -= falcon->func->emem_addr;
+		fallthrough;
+	case EMEM:
+		return falcon->func->emem_pio;
+	default:
+		return NULL;
+	}
+}
+
+int
+nvkm_falcon_pio_rd(struct nvkm_falcon *falcon, u8 port, enum nvkm_falcon_mem mem_type, u32 mem_base,
+		   const u8 *img, u32 img_base, int len)
+{
+	const struct nvkm_falcon_func_pio *pio = nvkm_falcon_pio(falcon, &mem_type, &mem_base);
+	const char *type = nvkm_falcon_mem(mem_type);
+	int xfer_len;
+
+	if (WARN_ON(!pio || !pio->rd))
+		return -EINVAL;
+
+	FLCN_DBG(falcon, "%s %08x -> %08x bytes at %08x", type, mem_base, len, img_base);
+	if (WARN_ON(!len || (len & (pio->min - 1))))
+		return -EINVAL;
+
+	pio->rd_init(falcon, port, mem_base);
+	do {
+		xfer_len = min(len, pio->max);
+		pio->rd(falcon, port, img, xfer_len);
+
+		if (nvkm_printk_ok(falcon->owner, falcon->user, NV_DBG_TRACE)) {
+			for (img_base = 0; img_base < xfer_len; img_base += 4, mem_base += 4) {
+				if (((img_base / 4) % 8) == 0)
+					printk(KERN_INFO "%s %08x ->", type, mem_base);
+				printk(KERN_CONT " %08x", *(u32 *)(img + img_base));
+			}
+		}
+
+		img += xfer_len;
+		len -= xfer_len;
+	} while (len);
+
+	return 0;
+}
+
+int
+nvkm_falcon_pio_wr(struct nvkm_falcon *falcon, const u8 *img, u32 img_base, u8 port,
+		   enum nvkm_falcon_mem mem_type, u32 mem_base, int len, u16 tag, bool sec)
+{
+	const struct nvkm_falcon_func_pio *pio = nvkm_falcon_pio(falcon, &mem_type, &mem_base);
+	const char *type = nvkm_falcon_mem(mem_type);
+	int xfer_len;
+
+	if (WARN_ON(!pio || !pio->wr))
+		return -EINVAL;
+
+	FLCN_DBG(falcon, "%s %08x <- %08x bytes at %08x", type, mem_base, len, img_base);
+	if (WARN_ON(!len || (len & (pio->min - 1))))
+		return -EINVAL;
+
+	pio->wr_init(falcon, port, sec, mem_base);
+	do {
+		xfer_len = min(len, pio->max);
+		pio->wr(falcon, port, img, xfer_len, tag++);
+
+		if (nvkm_printk_ok(falcon->owner, falcon->user, NV_DBG_TRACE)) {
+			for (img_base = 0; img_base < xfer_len; img_base += 4, mem_base += 4) {
+				if (((img_base / 4) % 8) == 0)
+					printk(KERN_INFO "%s %08x <-", type, mem_base);
+				printk(KERN_CONT " %08x", *(u32 *)(img + img_base));
+				if ((img_base / 4) == 7 && mem_type == IMEM)
+					printk(KERN_CONT " %04x", tag - 1);
+			}
+		}
+
+		img += xfer_len;
+		len -= xfer_len;
+	} while (len);
+
+	return 0;
+}
+
+void
+nvkm_falcon_load_imem(struct nvkm_falcon *falcon, void *data, u32 start,
+		      u32 size, u16 tag, u8 port, bool secure)
+{
+	if (secure && !falcon->secret) {
+		nvkm_warn(falcon->user,
+			  "writing with secure tag on a non-secure falcon!\n");
+		return;
+	}
+
+	falcon->func->load_imem(falcon, data, start, size, tag, port,
+				secure);
+}
+
+void
+nvkm_falcon_load_dmem(struct nvkm_falcon *falcon, void *data, u32 start,
+		      u32 size, u8 port)
+{
+	mutex_lock(&falcon->dmem_mutex);
+
+	falcon->func->load_dmem(falcon, data, start, size, port);
+
+	mutex_unlock(&falcon->dmem_mutex);
+}
+
+void
+nvkm_falcon_start(struct nvkm_falcon *falcon)
+{
+	falcon->func->start(falcon);
+}
+
+int
+nvkm_falcon_reset(struct nvkm_falcon *falcon)
+{
+	int ret;
+
+	ret = falcon->func->disable(falcon);
+	if (WARN_ON(ret))
+		return ret;
+
+	return nvkm_falcon_enable(falcon);
+}
+
+static int
+nvkm_falcon_oneinit(struct nvkm_falcon *falcon)
+{
+	const struct nvkm_falcon_func *func = falcon->func;
+	const struct nvkm_subdev *subdev = falcon->owner;
+	u32 reg;
+
+	if (!falcon->addr) {
+		falcon->addr = nvkm_top_addr(subdev->device, subdev->type, subdev->inst);
+		if (WARN_ON(!falcon->addr))
+			return -ENODEV;
+	}
+
+	reg = nvkm_falcon_rd32(falcon, 0x12c);
+	falcon->version = reg & 0xf;
+	falcon->secret = (reg >> 4) & 0x3;
+	falcon->code.ports = (reg >> 8) & 0xf;
+	falcon->data.ports = (reg >> 12) & 0xf;
+
+	reg = nvkm_falcon_rd32(falcon, 0x108);
+	falcon->code.limit = (reg & 0x1ff) << 8;
+	falcon->data.limit = (reg & 0x3fe00) >> 1;
+
+	if (func->debug) {
+		u32 val = nvkm_falcon_rd32(falcon, func->debug);
+		falcon->debug = (val >> 20) & 0x1;
+	}
+
+	return 0;
+}
+
+void
+nvkm_falcon_put(struct nvkm_falcon *falcon, struct nvkm_subdev *user)
+{
+	if (unlikely(!falcon))
+		return;
+
+	mutex_lock(&falcon->mutex);
+	if (falcon->user == user) {
+		nvkm_debug(falcon->user, "released %s falcon\n", falcon->name);
+		falcon->user = NULL;
+	}
+	mutex_unlock(&falcon->mutex);
+}
+
+int
+nvkm_falcon_get(struct nvkm_falcon *falcon, struct nvkm_subdev *user)
+{
+	int ret = 0;
+
+	mutex_lock(&falcon->mutex);
+	if (falcon->user) {
+		nvkm_error(user, "%s falcon already acquired by %s!\n",
+			   falcon->name, falcon->user->name);
+		mutex_unlock(&falcon->mutex);
+		return -EBUSY;
+	}
+
+	nvkm_debug(user, "acquired %s falcon\n", falcon->name);
+	if (!falcon->oneinit)
+		ret = nvkm_falcon_oneinit(falcon);
+	falcon->user = user;
+	mutex_unlock(&falcon->mutex);
+	return ret;
+}
+
+void
+nvkm_falcon_dtor(struct nvkm_falcon *falcon)
+{
+}
+
+int
+nvkm_falcon_ctor(const struct nvkm_falcon_func *func,
+		 struct nvkm_subdev *subdev, const char *name, u32 addr,
+		 struct nvkm_falcon *falcon)
+{
+	falcon->func = func;
+	falcon->owner = subdev;
+	falcon->name = name;
+	falcon->addr = addr;
+	falcon->addr2 = func->addr2;
+	mutex_init(&falcon->mutex);
+	mutex_init(&falcon->dmem_mutex);
+	return 0;
+}