1 files changed, 121 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/pwr/memx.c b/drivers/gpu/drm/nouveau/core/subdev/pwr/memx.c
new file mode 100644
index 000000000000..03de3107d29f
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/core/subdev/pwr/memx.c
@@ -0,0 +1,121 @@
+#ifndef __NVKM_PWR_MEMX_H__
+#define __NVKM_PWR_MEMX_H__
+
+#include <subdev/pwr.h>
+#include <subdev/pwr/fuc/os.h>
+
+struct nouveau_memx {
+	struct nouveau_pwr *ppwr;
+	u32 base;
+	u32 size;
+	struct {
+		u32 mthd;
+		u32 size;
+		u32 data[64];
+	} c;
+};
+
+static void
+memx_out(struct nouveau_memx *memx)
+{
+	struct nouveau_pwr *ppwr = memx->ppwr;
+	int i;
+
+	if (memx->c.size) {
+		nv_wr32(ppwr, 0x10a1c4, (memx->c.size << 16) | memx->c.mthd);
+		for (i = 0; i < memx->c.size; i++)
+			nv_wr32(ppwr, 0x10a1c4, memx->c.data[i]);
+		memx->c.size = 0;
+	}
+}
+
+static void
+memx_cmd(struct nouveau_memx *memx, u32 mthd, u32 size, u32 data[])
+{
+	if ((memx->c.size + size >= ARRAY_SIZE(memx->c.data)) ||
+	    (memx->c.size && memx->c.mthd != mthd))
+		memx_out(memx);
+	memcpy(&memx->c.data[memx->c.size], data, size * sizeof(data[0]));
+	memx->c.size += size;
+	memx->c.mthd  = mthd;
+}
+
+int
+nouveau_memx_init(struct nouveau_pwr *ppwr, struct nouveau_memx **pmemx)
+{
+	struct nouveau_memx *memx;
+	u32 reply[2];
+	int ret;
+
+	ret = ppwr->message(ppwr, reply, PROC_MEMX, MEMX_MSG_INFO, 0, 0);
+	if (ret)
+		return ret;
+
+	memx = *pmemx = kzalloc(sizeof(*memx), GFP_KERNEL);
+	if (!memx)
+		return -ENOMEM;
+	memx->ppwr = ppwr;
+	memx->base = reply[0];
+	memx->size = reply[1];
+
+	/* acquire data segment access */
+	do {
+		nv_wr32(ppwr, 0x10a580, 0x00000003);
+	} while (nv_rd32(ppwr, 0x10a580) != 0x00000003);
+	nv_wr32(ppwr, 0x10a1c0, 0x01000000 | memx->base);
+	nv_wr32(ppwr, 0x10a1c4, 0x00010000 | MEMX_ENTER);
+	nv_wr32(ppwr, 0x10a1c4, 0x00000000);
+	return 0;
+}
+
+int
+nouveau_memx_fini(struct nouveau_memx **pmemx, bool exec)
+{
+	struct nouveau_memx *memx = *pmemx;
+	struct nouveau_pwr *ppwr = memx->ppwr;
+	u32 finish, reply[2];
+
+	/* flush the cache... */
+	memx_out(memx);
+
+	/* release data segment access */
+	nv_wr32(ppwr, 0x10a1c4, 0x00000000 | MEMX_LEAVE);
+	finish = nv_rd32(ppwr, 0x10a1c0) & 0x00ffffff;
+	nv_wr32(ppwr, 0x10a580, 0x00000000);
+
+	/* call MEMX process to execute the script, and wait for reply */
+	if (exec) {
+		ppwr->message(ppwr, reply, PROC_MEMX, MEMX_MSG_EXEC,
+				 memx->base, finish);
+	}
+
+	kfree(memx);
+	return 0;
+}
+
+void
+nouveau_memx_wr32(struct nouveau_memx *memx, u32 addr, u32 data)
+{
+	nv_debug(memx->ppwr, "R[%06x] = 0x%08x\n", addr, data);
+	memx_cmd(memx, MEMX_WR32, 2, (u32[]){ addr, data });
+}
+
+void
+nouveau_memx_wait(struct nouveau_memx *memx,
+		  u32 addr, u32 mask, u32 data, u32 nsec)
+{
+	nv_debug(memx->ppwr, "R[%06x] & 0x%08x == 0x%08x, %d us\n",
+				addr, mask, data, nsec);
+	memx_cmd(memx, MEMX_WAIT, 4, (u32[]){ addr, ~mask, data, nsec });
+	memx_out(memx); /* fuc can't handle multiple */
+}
+
+void
+nouveau_memx_nsec(struct nouveau_memx *memx, u32 nsec)
+{
+	nv_debug(memx->ppwr, "    DELAY = %d ns\n", nsec);
+	memx_cmd(memx, MEMX_DELAY, 1, (u32[]){ nsec });
+	memx_out(memx); /* fuc can't handle multiple */
+}
+
+#endif