drm/nouveau/pmu: rename from pwr (no binary change)

Switch to NVIDIA's name for the device.

The namespace of NVKM is being changed to nvkm_ instead of nouveau_,
which will be used for the DRM part of the driver.  This is being
done in order to make it very clear as to what part of the driver a
given symbol belongs to, and as a minor step towards splitting the
DRM driver out to be able to stand on its own (for virt).

Because there's already a large amount of churn here anyway, this is
as good a time as any to also switch to NVIDIA's device and chipset
naming to ease collaboration with them.

A comparison of objdump disassemblies proves no code changes.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 201 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/memx.c b/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/memx.c
new file mode 100644
index 000000000000..671c7177d3af
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/memx.c
@@ -0,0 +1,201 @@
+#ifndef __NVKM_PMU_MEMX_H__
+#define __NVKM_PMU_MEMX_H__
+
+#include "priv.h"
+
+struct nouveau_memx {
+	struct nouveau_pmu *pmu;
+	u32 base;
+	u32 size;
+	struct {
+		u32 mthd;
+		u32 size;
+		u32 data[64];
+	} c;
+};
+
+static void
+memx_out(struct nouveau_memx *memx)
+{
+	struct nouveau_pmu *pmu = memx->pmu;
+	int i;
+
+	if (memx->c.mthd) {
+		nv_wr32(pmu, 0x10a1c4, (memx->c.size << 16) | memx->c.mthd);
+		for (i = 0; i < memx->c.size; i++)
+			nv_wr32(pmu, 0x10a1c4, memx->c.data[i]);
+		memx->c.mthd = 0;
+		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.mthd && 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_pmu *pmu, struct nouveau_memx **pmemx)
+{
+	struct nouveau_memx *memx;
+	u32 reply[2];
+	int ret;
+
+	ret = pmu->message(pmu, reply, PROC_MEMX, MEMX_MSG_INFO,
+					MEMX_INFO_DATA, 0);
+	if (ret)
+		return ret;
+
+	memx = *pmemx = kzalloc(sizeof(*memx), GFP_KERNEL);
+	if (!memx)
+		return -ENOMEM;
+	memx->pmu = pmu;
+	memx->base = reply[0];
+	memx->size = reply[1];
+
+	/* acquire data segment access */
+	do {
+		nv_wr32(pmu, 0x10a580, 0x00000003);
+	} while (nv_rd32(pmu, 0x10a580) != 0x00000003);
+	nv_wr32(pmu, 0x10a1c0, 0x01000000 | memx->base);
+
+	return 0;
+}
+
+int
+nouveau_memx_fini(struct nouveau_memx **pmemx, bool exec)
+{
+	struct nouveau_memx *memx = *pmemx;
+	struct nouveau_pmu *pmu = memx->pmu;
+	u32 finish, reply[2];
+
+	/* flush the cache... */
+	memx_out(memx);
+
+	/* release data segment access */
+	finish = nv_rd32(pmu, 0x10a1c0) & 0x00ffffff;
+	nv_wr32(pmu, 0x10a580, 0x00000000);
+
+	/* call MEMX process to execute the script, and wait for reply */
+	if (exec) {
+		pmu->message(pmu, reply, PROC_MEMX, MEMX_MSG_EXEC,
+				 memx->base, finish);
+	}
+
+	nv_debug(memx->pmu, "Exec took %uns, PMU_IN %08x\n",
+		 reply[0], reply[1]);
+	kfree(memx);
+	return 0;
+}
+
+void
+nouveau_memx_wr32(struct nouveau_memx *memx, u32 addr, u32 data)
+{
+	nv_debug(memx->pmu, "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->pmu, "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->pmu, "    DELAY = %d ns\n", nsec);
+	memx_cmd(memx, MEMX_DELAY, 1, (u32[]){ nsec });
+	memx_out(memx); /* fuc can't handle multiple */
+}
+
+void
+nouveau_memx_wait_vblank(struct nouveau_memx *memx)
+{
+	struct nouveau_pmu *pmu = memx->pmu;
+	u32 heads, x, y, px = 0;
+	int i, head_sync;
+
+	if (nv_device(pmu)->chipset < 0xd0) {
+		heads = nv_rd32(pmu, 0x610050);
+		for (i = 0; i < 2; i++) {
+			/* Heuristic: sync to head with biggest resolution */
+			if (heads & (2 << (i << 3))) {
+				x = nv_rd32(pmu, 0x610b40 + (0x540 * i));
+				y = (x & 0xffff0000) >> 16;
+				x &= 0x0000ffff;
+				if ((x * y) > px) {
+					px = (x * y);
+					head_sync = i;
+				}
+			}
+		}
+	}
+
+	if (px == 0) {
+		nv_debug(memx->pmu, "WAIT VBLANK !NO ACTIVE HEAD\n");
+		return;
+	}
+
+	nv_debug(memx->pmu, "WAIT VBLANK HEAD%d\n", head_sync);
+	memx_cmd(memx, MEMX_VBLANK, 1, (u32[]){ head_sync });
+	memx_out(memx); /* fuc can't handle multiple */
+}
+
+void
+nouveau_memx_train(struct nouveau_memx *memx)
+{
+	nv_debug(memx->pmu, "   MEM TRAIN\n");
+	memx_cmd(memx, MEMX_TRAIN, 0, NULL);
+}
+
+int
+nouveau_memx_train_result(struct nouveau_pmu *pmu, u32 *res, int rsize)
+{
+	u32 reply[2], base, size, i;
+	int ret;
+
+	ret = pmu->message(pmu, reply, PROC_MEMX, MEMX_MSG_INFO,
+					MEMX_INFO_TRAIN, 0);
+	if (ret)
+		return ret;
+
+	base = reply[0];
+	size = reply[1] >> 2;
+	if (size > rsize)
+		return -ENOMEM;
+
+	/* read the packet */
+	nv_wr32(pmu, 0x10a1c0, 0x02000000 | base);
+
+	for (i = 0; i < size; i++)
+		res[i] = nv_rd32(pmu, 0x10a1c4);
+
+	return 0;
+}
+
+void
+nouveau_memx_block(struct nouveau_memx *memx)
+{
+	nv_debug(memx->pmu, "   HOST BLOCKED\n");
+	memx_cmd(memx, MEMX_ENTER, 0, NULL);
+}
+
+void
+nouveau_memx_unblock(struct nouveau_memx *memx)
+{
+	nv_debug(memx->pmu, "   HOST UNBLOCKED\n");
+	memx_cmd(memx, MEMX_LEAVE, 0, NULL);
+}
+
+#endif