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339 lines
8.7 KiB
C
339 lines
8.7 KiB
C
/*
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* Copyright 2011 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Ben Skeggs
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*/
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#include "drmP.h"
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#include "nouveau_drv.h"
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#include "nouveau_bios.h"
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#include "nouveau_pm.h"
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#include "nouveau_hw.h"
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#define min2(a,b) ((a) < (b) ? (a) : (b))
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static u32
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read_pll_1(struct drm_device *dev, u32 reg)
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{
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u32 ctrl = nv_rd32(dev, reg + 0x00);
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int P = (ctrl & 0x00070000) >> 16;
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int N = (ctrl & 0x0000ff00) >> 8;
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int M = (ctrl & 0x000000ff) >> 0;
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u32 ref = 27000, clk = 0;
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if (ctrl & 0x80000000)
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clk = ref * N / M;
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return clk >> P;
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}
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static u32
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read_pll_2(struct drm_device *dev, u32 reg)
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{
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u32 ctrl = nv_rd32(dev, reg + 0x00);
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u32 coef = nv_rd32(dev, reg + 0x04);
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int N2 = (coef & 0xff000000) >> 24;
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int M2 = (coef & 0x00ff0000) >> 16;
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int N1 = (coef & 0x0000ff00) >> 8;
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int M1 = (coef & 0x000000ff) >> 0;
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int P = (ctrl & 0x00070000) >> 16;
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u32 ref = 27000, clk = 0;
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if (ctrl & 0x80000000)
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clk = ref * N1 / M1;
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if (!(ctrl & 0x00000100)) {
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if (ctrl & 0x40000000)
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clk = clk * N2 / M2;
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}
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return clk >> P;
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}
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static u32
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read_clk(struct drm_device *dev, u32 src)
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{
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switch (src) {
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case 3:
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return read_pll_2(dev, 0x004000);
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case 2:
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return read_pll_1(dev, 0x004008);
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default:
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break;
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}
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return 0;
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}
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int
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nv40_pm_clocks_get(struct drm_device *dev, struct nouveau_pm_level *perflvl)
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{
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u32 ctrl = nv_rd32(dev, 0x00c040);
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perflvl->core = read_clk(dev, (ctrl & 0x00000003) >> 0);
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perflvl->shader = read_clk(dev, (ctrl & 0x00000030) >> 4);
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perflvl->memory = read_pll_2(dev, 0x4020);
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return 0;
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}
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struct nv40_pm_state {
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u32 ctrl;
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u32 npll_ctrl;
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u32 npll_coef;
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u32 spll;
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u32 mpll_ctrl;
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u32 mpll_coef;
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};
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static int
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nv40_calc_pll(struct drm_device *dev, u32 reg, struct pll_lims *pll,
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u32 clk, int *N1, int *M1, int *N2, int *M2, int *log2P)
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{
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struct nouveau_pll_vals coef;
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int ret;
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ret = get_pll_limits(dev, reg, pll);
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if (ret)
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return ret;
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if (clk < pll->vco1.maxfreq)
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pll->vco2.maxfreq = 0;
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ret = nouveau_calc_pll_mnp(dev, pll, clk, &coef);
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if (ret == 0)
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return -ERANGE;
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*N1 = coef.N1;
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*M1 = coef.M1;
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if (N2 && M2) {
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if (pll->vco2.maxfreq) {
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*N2 = coef.N2;
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*M2 = coef.M2;
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} else {
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*N2 = 1;
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*M2 = 1;
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}
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}
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*log2P = coef.log2P;
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return 0;
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}
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void *
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nv40_pm_clocks_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl)
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{
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struct nv40_pm_state *info;
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struct pll_lims pll;
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int N1, N2, M1, M2, log2P;
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int ret;
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info = kmalloc(sizeof(*info), GFP_KERNEL);
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if (!info)
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return ERR_PTR(-ENOMEM);
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/* core/geometric clock */
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ret = nv40_calc_pll(dev, 0x004000, &pll, perflvl->core,
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&N1, &M1, &N2, &M2, &log2P);
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if (ret < 0)
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goto out;
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if (N2 == M2) {
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info->npll_ctrl = 0x80000100 | (log2P << 16);
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info->npll_coef = (N1 << 8) | M1;
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} else {
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info->npll_ctrl = 0xc0000000 | (log2P << 16);
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info->npll_coef = (N2 << 24) | (M2 << 16) | (N1 << 8) | M1;
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}
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/* use the second PLL for shader/rop clock, if it differs from core */
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if (perflvl->shader && perflvl->shader != perflvl->core) {
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ret = nv40_calc_pll(dev, 0x004008, &pll, perflvl->shader,
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&N1, &M1, NULL, NULL, &log2P);
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if (ret < 0)
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goto out;
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info->spll = 0xc0000000 | (log2P << 16) | (N1 << 8) | M1;
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info->ctrl = 0x00000223;
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} else {
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info->spll = 0x00000000;
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info->ctrl = 0x00000333;
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}
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/* memory clock */
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ret = nv40_calc_pll(dev, 0x004020, &pll, perflvl->memory,
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&N1, &M1, &N2, &M2, &log2P);
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if (ret < 0)
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goto out;
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info->mpll_ctrl = 0x80000000 | (log2P << 16);
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info->mpll_ctrl |= min2(pll.log2p_bias + log2P, pll.max_log2p) << 20;
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if (N2 == M2) {
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info->mpll_ctrl |= 0x00000100;
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info->mpll_coef = (N1 << 8) | M1;
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} else {
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info->mpll_ctrl |= 0x40000000;
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info->mpll_coef = (N2 << 24) | (M2 << 16) | (N1 << 8) | M1;
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}
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out:
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if (ret < 0) {
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kfree(info);
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info = ERR_PTR(ret);
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}
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return info;
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}
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static bool
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nv40_pm_gr_idle(void *data)
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{
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struct drm_device *dev = data;
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if ((nv_rd32(dev, 0x400760) & 0x000000f0) >> 4 !=
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(nv_rd32(dev, 0x400760) & 0x0000000f))
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return false;
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if (nv_rd32(dev, 0x400700))
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return false;
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return true;
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}
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void
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nv40_pm_clocks_set(struct drm_device *dev, void *pre_state)
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{
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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struct nv40_pm_state *info = pre_state;
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unsigned long flags;
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struct bit_entry M;
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u32 crtc_mask = 0;
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u8 sr1[2];
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int i;
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/* determine which CRTCs are active, fetch VGA_SR1 for each */
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for (i = 0; i < 2; i++) {
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u32 vbl = nv_rd32(dev, 0x600808 + (i * 0x2000));
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u32 cnt = 0;
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do {
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if (vbl != nv_rd32(dev, 0x600808 + (i * 0x2000))) {
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nv_wr08(dev, 0x0c03c4 + (i * 0x2000), 0x01);
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sr1[i] = nv_rd08(dev, 0x0c03c5 + (i * 0x2000));
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if (!(sr1[i] & 0x20))
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crtc_mask |= (1 << i);
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break;
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}
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udelay(1);
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} while (cnt++ < 32);
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}
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/* halt and idle engines */
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spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
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nv_mask(dev, 0x002500, 0x00000001, 0x00000000);
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if (!nv_wait(dev, 0x002500, 0x00000010, 0x00000000))
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goto resume;
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nv_mask(dev, 0x003220, 0x00000001, 0x00000000);
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if (!nv_wait(dev, 0x003220, 0x00000010, 0x00000000))
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goto resume;
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nv_mask(dev, 0x003200, 0x00000001, 0x00000000);
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nv04_fifo_cache_pull(dev, false);
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if (!nv_wait_cb(dev, nv40_pm_gr_idle, dev))
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goto resume;
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/* set engine clocks */
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nv_mask(dev, 0x00c040, 0x00000333, 0x00000000);
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nv_wr32(dev, 0x004004, info->npll_coef);
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nv_mask(dev, 0x004000, 0xc0070100, info->npll_ctrl);
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nv_mask(dev, 0x004008, 0xc007ffff, info->spll);
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mdelay(5);
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nv_mask(dev, 0x00c040, 0x00000333, info->ctrl);
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/* wait for vblank start on active crtcs, disable memory access */
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for (i = 0; i < 2; i++) {
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if (!(crtc_mask & (1 << i)))
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continue;
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nv_wait(dev, 0x600808 + (i * 0x2000), 0x00010000, 0x00000000);
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nv_wait(dev, 0x600808 + (i * 0x2000), 0x00010000, 0x00010000);
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nv_wr08(dev, 0x0c03c4 + (i * 0x2000), 0x01);
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nv_wr08(dev, 0x0c03c5 + (i * 0x2000), sr1[i] | 0x20);
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}
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/* prepare ram for reclocking */
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nv_wr32(dev, 0x1002d4, 0x00000001); /* precharge */
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nv_wr32(dev, 0x1002d0, 0x00000001); /* refresh */
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nv_wr32(dev, 0x1002d0, 0x00000001); /* refresh */
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nv_mask(dev, 0x100210, 0x80000000, 0x00000000); /* no auto refresh */
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nv_wr32(dev, 0x1002dc, 0x00000001); /* enable self-refresh */
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/* change the PLL of each memory partition */
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nv_mask(dev, 0x00c040, 0x0000c000, 0x00000000);
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switch (dev_priv->chipset) {
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case 0x40:
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case 0x45:
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case 0x41:
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case 0x42:
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case 0x47:
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nv_mask(dev, 0x004044, 0xc0771100, info->mpll_ctrl);
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nv_mask(dev, 0x00402c, 0xc0771100, info->mpll_ctrl);
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nv_wr32(dev, 0x004048, info->mpll_coef);
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nv_wr32(dev, 0x004030, info->mpll_coef);
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case 0x43:
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case 0x49:
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case 0x4b:
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nv_mask(dev, 0x004038, 0xc0771100, info->mpll_ctrl);
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nv_wr32(dev, 0x00403c, info->mpll_coef);
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default:
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nv_mask(dev, 0x004020, 0xc0771100, info->mpll_ctrl);
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nv_wr32(dev, 0x004024, info->mpll_coef);
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break;
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}
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udelay(100);
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nv_mask(dev, 0x00c040, 0x0000c000, 0x0000c000);
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/* re-enable normal operation of memory controller */
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nv_wr32(dev, 0x1002dc, 0x00000000);
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nv_mask(dev, 0x100210, 0x80000000, 0x80000000);
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udelay(100);
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/* execute memory reset script from vbios */
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if (!bit_table(dev, 'M', &M))
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nouveau_bios_init_exec(dev, ROM16(M.data[0]));
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/* make sure we're in vblank (hopefully the same one as before), and
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* then re-enable crtc memory access
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*/
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for (i = 0; i < 2; i++) {
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if (!(crtc_mask & (1 << i)))
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continue;
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nv_wait(dev, 0x600808 + (i * 0x2000), 0x00010000, 0x00010000);
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nv_wr08(dev, 0x0c03c4 + (i * 0x2000), 0x01);
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nv_wr08(dev, 0x0c03c5 + (i * 0x2000), sr1[i]);
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}
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/* resume engines */
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resume:
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nv_wr32(dev, 0x003250, 0x00000001);
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nv_mask(dev, 0x003220, 0x00000001, 0x00000001);
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nv_wr32(dev, 0x003200, 0x00000001);
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nv_wr32(dev, 0x002500, 0x00000001);
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spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
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kfree(info);
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}
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