+/*
+ * Copyright 2014 Red Hat Inc.
+ *
+ * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs
+ */
+
+#include <subdev/fb.h>
+#include <subdev/timer.h>
+
+#include "gf100.h"
+
+static void
+gm107_ltcg_lts_isr(struct gf100_ltcg_priv *priv, int ltc, int lts)
+{
+ u32 base = 0x140000 + (ltc * 0x2000) + (lts * 0x400);
+ u32 stat = nv_rd32(priv, base + 0x00c);
+
+ if (stat) {
+ nv_info(priv, "LTC%d_LTS%d: 0x%08x\n", ltc, lts, stat);
+ nv_wr32(priv, base + 0x00c, stat);
+ }
+}
+
+static void
+gm107_ltcg_intr(struct nouveau_subdev *subdev)
+{
+ struct gf100_ltcg_priv *priv = (void *)subdev;
+ u32 mask;
+
+ mask = nv_rd32(priv, 0x00017c);
+ while (mask) {
+ u32 lts, ltc = __ffs(mask);
+ for (lts = 0; lts < priv->lts_nr; lts++)
+ gm107_ltcg_lts_isr(priv, ltc, lts);
+ mask &= ~(1 << ltc);
+ }
+
+ /* we do something horribly wrong and upset PMFB a lot, so mask off
+ * interrupts from it after the first one until it's fixed
+ */
+ nv_mask(priv, 0x000640, 0x02000000, 0x00000000);
+}
+
+static void
+gm107_ltcg_tags_clear(struct nouveau_ltcg *ltcg, u32 first, u32 count)
+{
+ struct gf100_ltcg_priv *priv = (struct gf100_ltcg_priv *)ltcg;
+ u32 last = first + count - 1;
+ int p, i;
+
+ BUG_ON((first > last) || (last >= priv->num_tags));
+
+ nv_wr32(priv, 0x17e270, first);
+ nv_wr32(priv, 0x17e274, last);
+ nv_wr32(priv, 0x17e26c, 0x4); /* trigger clear */
+
+ /* wait until it's finished with clearing */
+ for (p = 0; p < priv->ltc_nr; ++p) {
+ for (i = 0; i < priv->lts_nr; ++i)
+ nv_wait(priv, 0x14046c + p * 0x2000 + i * 0x200, ~0, 0);
+ }
+}
+
+static int
+gm107_ltcg_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
+ struct nouveau_oclass *oclass, void *data, u32 size,
+ struct nouveau_object **pobject)
+{
+ struct gf100_ltcg_priv *priv;
+ struct nouveau_fb *pfb = nouveau_fb(parent);
+ u32 parts, mask;
+ int ret, i;
+
+ ret = nouveau_ltcg_create(parent, engine, oclass, &priv);
+ *pobject = nv_object(priv);
+ if (ret)
+ return ret;
+
+ parts = nv_rd32(priv, 0x022438);
+ mask = nv_rd32(priv, 0x021c14);
+ for (i = 0; i < parts; i++) {
+ if (!(mask & (1 << i)))
+ priv->ltc_nr++;
+ }
+ priv->lts_nr = nv_rd32(priv, 0x17e280) >> 28;
+
+ ret = gf100_ltcg_init_tag_ram(pfb, priv);
+ if (ret)
+ return ret;
+
+ priv->base.tags_alloc = gf100_ltcg_tags_alloc;
+ priv->base.tags_free = gf100_ltcg_tags_free;
+ priv->base.tags_clear = gm107_ltcg_tags_clear;
+
+ nv_subdev(priv)->intr = gm107_ltcg_intr;
+ return 0;
+}
+
+static int
+gm107_ltcg_init(struct nouveau_object *object)
+{
+ struct nouveau_ltcg *ltcg = (struct nouveau_ltcg *)object;
+ struct gf100_ltcg_priv *priv = (struct gf100_ltcg_priv *)ltcg;
+ int ret;
+
+ ret = nouveau_ltcg_init(ltcg);
+ if (ret)
+ return ret;
+
+ nv_wr32(priv, 0x17e27c, priv->ltc_nr);
+ nv_wr32(priv, 0x17e278, priv->tag_base);
+ return 0;
+}
+
+struct nouveau_oclass *
+gm107_ltcg_oclass = &(struct nouveau_oclass) {
+ .handle = NV_SUBDEV(LTCG, 0xff),
+ .ofuncs = &(struct nouveau_ofuncs) {
+ .ctor = gm107_ltcg_ctor,
+ .dtor = gf100_ltcg_dtor,
+ .init = gm107_ltcg_init,
+ .fini = _nouveau_ltcg_fini,
+ },
+};