--- /dev/null
+/*
+ * Copyright 2012 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
+ * Roy Spliet
+ */
+#include "gt215.h"
+#include "pll.h"
+
+#include <core/device.h>
+#include <engine/fifo.h>
+#include <subdev/bios.h>
+#include <subdev/bios/pll.h>
+#include <subdev/timer.h>
+
+struct gt215_clk_priv {
+ struct nvkm_clk base;
+ struct gt215_clk_info eng[nv_clk_src_max];
+};
+
+static u32 read_clk(struct gt215_clk_priv *, int, bool);
+static u32 read_pll(struct gt215_clk_priv *, int, u32);
+
+static u32
+read_vco(struct gt215_clk_priv *priv, int clk)
+{
+ u32 sctl = nv_rd32(priv, 0x4120 + (clk * 4));
+
+ switch (sctl & 0x00000030) {
+ case 0x00000000:
+ return nv_device(priv)->crystal;
+ case 0x00000020:
+ return read_pll(priv, 0x41, 0x00e820);
+ case 0x00000030:
+ return read_pll(priv, 0x42, 0x00e8a0);
+ default:
+ return 0;
+ }
+}
+
+static u32
+read_clk(struct gt215_clk_priv *priv, int clk, bool ignore_en)
+{
+ u32 sctl, sdiv, sclk;
+
+ /* refclk for the 0xe8xx plls is a fixed frequency */
+ if (clk >= 0x40) {
+ if (nv_device(priv)->chipset == 0xaf) {
+ /* no joke.. seriously.. sigh.. */
+ return nv_rd32(priv, 0x00471c) * 1000;
+ }
+
+ return nv_device(priv)->crystal;
+ }
+
+ sctl = nv_rd32(priv, 0x4120 + (clk * 4));
+ if (!ignore_en && !(sctl & 0x00000100))
+ return 0;
+
+ /* out_alt */
+ if (sctl & 0x00000400)
+ return 108000;
+
+ /* vco_out */
+ switch (sctl & 0x00003000) {
+ case 0x00000000:
+ if (!(sctl & 0x00000200))
+ return nv_device(priv)->crystal;
+ return 0;
+ case 0x00002000:
+ if (sctl & 0x00000040)
+ return 108000;
+ return 100000;
+ case 0x00003000:
+ /* vco_enable */
+ if (!(sctl & 0x00000001))
+ return 0;
+
+ sclk = read_vco(priv, clk);
+ sdiv = ((sctl & 0x003f0000) >> 16) + 2;
+ return (sclk * 2) / sdiv;
+ default:
+ return 0;
+ }
+}
+
+static u32
+read_pll(struct gt215_clk_priv *priv, int clk, u32 pll)
+{
+ u32 ctrl = nv_rd32(priv, pll + 0);
+ u32 sclk = 0, P = 1, N = 1, M = 1;
+
+ if (!(ctrl & 0x00000008)) {
+ if (ctrl & 0x00000001) {
+ u32 coef = nv_rd32(priv, pll + 4);
+ M = (coef & 0x000000ff) >> 0;
+ N = (coef & 0x0000ff00) >> 8;
+ P = (coef & 0x003f0000) >> 16;
+
+ /* no post-divider on these..
+ * XXX: it looks more like two post-"dividers" that
+ * cross each other out in the default RPLL config */
+ if ((pll & 0x00ff00) == 0x00e800)
+ P = 1;
+
+ sclk = read_clk(priv, 0x00 + clk, false);
+ }
+ } else {
+ sclk = read_clk(priv, 0x10 + clk, false);
+ }
+
+ if (M * P)
+ return sclk * N / (M * P);
+
+ return 0;
+}
+
+static int
+gt215_clk_read(struct nvkm_clk *clk, enum nv_clk_src src)
+{
+ struct gt215_clk_priv *priv = (void *)clk;
+ u32 hsrc;
+
+ switch (src) {
+ case nv_clk_src_crystal:
+ return nv_device(priv)->crystal;
+ case nv_clk_src_core:
+ case nv_clk_src_core_intm:
+ return read_pll(priv, 0x00, 0x4200);
+ case nv_clk_src_shader:
+ return read_pll(priv, 0x01, 0x4220);
+ case nv_clk_src_mem:
+ return read_pll(priv, 0x02, 0x4000);
+ case nv_clk_src_disp:
+ return read_clk(priv, 0x20, false);
+ case nv_clk_src_vdec:
+ return read_clk(priv, 0x21, false);
+ case nv_clk_src_daemon:
+ return read_clk(priv, 0x25, false);
+ case nv_clk_src_host:
+ hsrc = (nv_rd32(priv, 0xc040) & 0x30000000) >> 28;
+ switch (hsrc) {
+ case 0:
+ return read_clk(priv, 0x1d, false);
+ case 2:
+ case 3:
+ return 277000;
+ default:
+ nv_error(clk, "unknown HOST clock source %d\n", hsrc);
+ return -EINVAL;
+ }
+ default:
+ nv_error(clk, "invalid clock source %d\n", src);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int
+gt215_clk_info(struct nvkm_clk *clock, int clk, u32 khz,
+ struct gt215_clk_info *info)
+{
+ struct gt215_clk_priv *priv = (void *)clock;
+ u32 oclk, sclk, sdiv, diff;
+
+ info->clk = 0;
+
+ switch (khz) {
+ case 27000:
+ info->clk = 0x00000100;
+ return khz;
+ case 100000:
+ info->clk = 0x00002100;
+ return khz;
+ case 108000:
+ info->clk = 0x00002140;
+ return khz;
+ default:
+ sclk = read_vco(priv, clk);
+ sdiv = min((sclk * 2) / khz, (u32)65);
+ oclk = (sclk * 2) / sdiv;
+ diff = ((khz + 3000) - oclk);
+
+ /* When imprecise, play it safe and aim for a clock lower than
+ * desired rather than higher */
+ if (diff < 0) {
+ sdiv++;
+ oclk = (sclk * 2) / sdiv;
+ }
+
+ /* divider can go as low as 2, limited here because NVIDIA
+ * and the VBIOS on my NVA8 seem to prefer using the PLL
+ * for 810MHz - is there a good reason?
+ * XXX: PLLs with refclk 810MHz? */
+ if (sdiv > 4) {
+ info->clk = (((sdiv - 2) << 16) | 0x00003100);
+ return oclk;
+ }
+
+ break;
+ }
+
+ return -ERANGE;
+}
+
+int
+gt215_pll_info(struct nvkm_clk *clock, int clk, u32 pll, u32 khz,
+ struct gt215_clk_info *info)
+{
+ struct nvkm_bios *bios = nvkm_bios(clock);
+ struct gt215_clk_priv *priv = (void *)clock;
+ struct nvbios_pll limits;
+ int P, N, M, diff;
+ int ret;
+
+ info->pll = 0;
+
+ /* If we can get a within [-2, 3) MHz of a divider, we'll disable the
+ * PLL and use the divider instead. */
+ ret = gt215_clk_info(clock, clk, khz, info);
+ diff = khz - ret;
+ if (!pll || (diff >= -2000 && diff < 3000)) {
+ goto out;
+ }
+
+ /* Try with PLL */
+ ret = nvbios_pll_parse(bios, pll, &limits);
+ if (ret)
+ return ret;
+
+ ret = gt215_clk_info(clock, clk - 0x10, limits.refclk, info);
+ if (ret != limits.refclk)
+ return -EINVAL;
+
+ ret = gt215_pll_calc(nv_subdev(priv), &limits, khz, &N, NULL, &M, &P);
+ if (ret >= 0) {
+ info->pll = (P << 16) | (N << 8) | M;
+ }
+
+out:
+ info->fb_delay = max(((khz + 7566) / 15133), (u32) 18);
+ return ret ? ret : -ERANGE;
+}
+
+static int
+calc_clk(struct gt215_clk_priv *priv, struct nvkm_cstate *cstate,
+ int clk, u32 pll, int idx)
+{
+ int ret = gt215_pll_info(&priv->base, clk, pll, cstate->domain[idx],
+ &priv->eng[idx]);
+ if (ret >= 0)
+ return 0;
+ return ret;
+}
+
+static int
+calc_host(struct gt215_clk_priv *priv, struct nvkm_cstate *cstate)
+{
+ int ret = 0;
+ u32 kHz = cstate->domain[nv_clk_src_host];
+ struct gt215_clk_info *info = &priv->eng[nv_clk_src_host];
+
+ if (kHz == 277000) {
+ info->clk = 0;
+ info->host_out = NVA3_HOST_277;
+ return 0;
+ }
+
+ info->host_out = NVA3_HOST_CLK;
+
+ ret = gt215_clk_info(&priv->base, 0x1d, kHz, info);
+ if (ret >= 0)
+ return 0;
+
+ return ret;
+}
+
+int
+gt215_clk_pre(struct nvkm_clk *clk, unsigned long *flags)
+{
+ struct nvkm_fifo *pfifo = nvkm_fifo(clk);
+
+ /* halt and idle execution engines */
+ nv_mask(clk, 0x020060, 0x00070000, 0x00000000);
+ nv_mask(clk, 0x002504, 0x00000001, 0x00000001);
+ /* Wait until the interrupt handler is finished */
+ if (!nv_wait(clk, 0x000100, 0xffffffff, 0x00000000))
+ return -EBUSY;
+
+ if (pfifo)
+ pfifo->pause(pfifo, flags);
+
+ if (!nv_wait(clk, 0x002504, 0x00000010, 0x00000010))
+ return -EIO;
+ if (!nv_wait(clk, 0x00251c, 0x0000003f, 0x0000003f))
+ return -EIO;
+
+ return 0;
+}
+
+void
+gt215_clk_post(struct nvkm_clk *clk, unsigned long *flags)
+{
+ struct nvkm_fifo *pfifo = nvkm_fifo(clk);
+
+ if (pfifo && flags)
+ pfifo->start(pfifo, flags);
+
+ nv_mask(clk, 0x002504, 0x00000001, 0x00000000);
+ nv_mask(clk, 0x020060, 0x00070000, 0x00040000);
+}
+
+static void
+disable_clk_src(struct gt215_clk_priv *priv, u32 src)
+{
+ nv_mask(priv, src, 0x00000100, 0x00000000);
+ nv_mask(priv, src, 0x00000001, 0x00000000);
+}
+
+static void
+prog_pll(struct gt215_clk_priv *priv, int clk, u32 pll, int idx)
+{
+ struct gt215_clk_info *info = &priv->eng[idx];
+ const u32 src0 = 0x004120 + (clk * 4);
+ const u32 src1 = 0x004160 + (clk * 4);
+ const u32 ctrl = pll + 0;
+ const u32 coef = pll + 4;
+ u32 bypass;
+
+ if (info->pll) {
+ /* Always start from a non-PLL clock */
+ bypass = nv_rd32(priv, ctrl) & 0x00000008;
+ if (!bypass) {
+ nv_mask(priv, src1, 0x00000101, 0x00000101);
+ nv_mask(priv, ctrl, 0x00000008, 0x00000008);
+ udelay(20);
+ }
+
+ nv_mask(priv, src0, 0x003f3141, 0x00000101 | info->clk);
+ nv_wr32(priv, coef, info->pll);
+ nv_mask(priv, ctrl, 0x00000015, 0x00000015);
+ nv_mask(priv, ctrl, 0x00000010, 0x00000000);
+ if (!nv_wait(priv, ctrl, 0x00020000, 0x00020000)) {
+ nv_mask(priv, ctrl, 0x00000010, 0x00000010);
+ nv_mask(priv, src0, 0x00000101, 0x00000000);
+ return;
+ }
+ nv_mask(priv, ctrl, 0x00000010, 0x00000010);
+ nv_mask(priv, ctrl, 0x00000008, 0x00000000);
+ disable_clk_src(priv, src1);
+ } else {
+ nv_mask(priv, src1, 0x003f3141, 0x00000101 | info->clk);
+ nv_mask(priv, ctrl, 0x00000018, 0x00000018);
+ udelay(20);
+ nv_mask(priv, ctrl, 0x00000001, 0x00000000);
+ disable_clk_src(priv, src0);
+ }
+}
+
+static void
+prog_clk(struct gt215_clk_priv *priv, int clk, int idx)
+{
+ struct gt215_clk_info *info = &priv->eng[idx];
+ nv_mask(priv, 0x004120 + (clk * 4), 0x003f3141, 0x00000101 | info->clk);
+}
+
+static void
+prog_host(struct gt215_clk_priv *priv)
+{
+ struct gt215_clk_info *info = &priv->eng[nv_clk_src_host];
+ u32 hsrc = (nv_rd32(priv, 0xc040));
+
+ switch (info->host_out) {
+ case NVA3_HOST_277:
+ if ((hsrc & 0x30000000) == 0) {
+ nv_wr32(priv, 0xc040, hsrc | 0x20000000);
+ disable_clk_src(priv, 0x4194);
+ }
+ break;
+ case NVA3_HOST_CLK:
+ prog_clk(priv, 0x1d, nv_clk_src_host);
+ if ((hsrc & 0x30000000) >= 0x20000000) {
+ nv_wr32(priv, 0xc040, hsrc & ~0x30000000);
+ }
+ break;
+ default:
+ break;
+ }
+
+ /* This seems to be a clock gating factor on idle, always set to 64 */
+ nv_wr32(priv, 0xc044, 0x3e);
+}
+
+static void
+prog_core(struct gt215_clk_priv *priv, int idx)
+{
+ struct gt215_clk_info *info = &priv->eng[idx];
+ u32 fb_delay = nv_rd32(priv, 0x10002c);
+
+ if (fb_delay < info->fb_delay)
+ nv_wr32(priv, 0x10002c, info->fb_delay);
+
+ prog_pll(priv, 0x00, 0x004200, idx);
+
+ if (fb_delay > info->fb_delay)
+ nv_wr32(priv, 0x10002c, info->fb_delay);
+}
+
+static int
+gt215_clk_calc(struct nvkm_clk *clk, struct nvkm_cstate *cstate)
+{
+ struct gt215_clk_priv *priv = (void *)clk;
+ struct gt215_clk_info *core = &priv->eng[nv_clk_src_core];
+ int ret;
+
+ if ((ret = calc_clk(priv, cstate, 0x10, 0x4200, nv_clk_src_core)) ||
+ (ret = calc_clk(priv, cstate, 0x11, 0x4220, nv_clk_src_shader)) ||
+ (ret = calc_clk(priv, cstate, 0x20, 0x0000, nv_clk_src_disp)) ||
+ (ret = calc_clk(priv, cstate, 0x21, 0x0000, nv_clk_src_vdec)) ||
+ (ret = calc_host(priv, cstate)))
+ return ret;
+
+ /* XXX: Should be reading the highest bit in the VBIOS clock to decide
+ * whether to use a PLL or not... but using a PLL defeats the purpose */
+ if (core->pll) {
+ ret = gt215_clk_info(clk, 0x10,
+ cstate->domain[nv_clk_src_core_intm],
+ &priv->eng[nv_clk_src_core_intm]);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int
+gt215_clk_prog(struct nvkm_clk *clk)
+{
+ struct gt215_clk_priv *priv = (void *)clk;
+ struct gt215_clk_info *core = &priv->eng[nv_clk_src_core];
+ int ret = 0;
+ unsigned long flags;
+ unsigned long *f = &flags;
+
+ ret = gt215_clk_pre(clk, f);
+ if (ret)
+ goto out;
+
+ if (core->pll)
+ prog_core(priv, nv_clk_src_core_intm);
+
+ prog_core(priv, nv_clk_src_core);
+ prog_pll(priv, 0x01, 0x004220, nv_clk_src_shader);
+ prog_clk(priv, 0x20, nv_clk_src_disp);
+ prog_clk(priv, 0x21, nv_clk_src_vdec);
+ prog_host(priv);
+
+out:
+ if (ret == -EBUSY)
+ f = NULL;
+
+ gt215_clk_post(clk, f);
+ return ret;
+}
+
+static void
+gt215_clk_tidy(struct nvkm_clk *clk)
+{
+}
+
+static struct nvkm_domain
+gt215_domain[] = {
+ { nv_clk_src_crystal , 0xff },
+ { nv_clk_src_core , 0x00, 0, "core", 1000 },
+ { nv_clk_src_shader , 0x01, 0, "shader", 1000 },
+ { nv_clk_src_mem , 0x02, 0, "memory", 1000 },
+ { nv_clk_src_vdec , 0x03 },
+ { nv_clk_src_disp , 0x04 },
+ { nv_clk_src_host , 0x05 },
+ { nv_clk_src_core_intm, 0x06 },
+ { nv_clk_src_max }
+};
+
+static int
+gt215_clk_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
+ struct nvkm_oclass *oclass, void *data, u32 size,
+ struct nvkm_object **pobject)
+{
+ struct gt215_clk_priv *priv;
+ int ret;
+
+ ret = nvkm_clk_create(parent, engine, oclass, gt215_domain,
+ NULL, 0, true, &priv);
+ *pobject = nv_object(priv);
+ if (ret)
+ return ret;
+
+ priv->base.read = gt215_clk_read;
+ priv->base.calc = gt215_clk_calc;
+ priv->base.prog = gt215_clk_prog;
+ priv->base.tidy = gt215_clk_tidy;
+ return 0;
+}
+
+struct nvkm_oclass
+gt215_clk_oclass = {
+ .handle = NV_SUBDEV(CLK, 0xa3),
+ .ofuncs = &(struct nvkm_ofuncs) {
+ .ctor = gt215_clk_ctor,
+ .dtor = _nvkm_clk_dtor,
+ .init = _nvkm_clk_init,
+ .fini = _nvkm_clk_fini,
+ },
+};
Code Review / kvmfornfv.git / blobdiff