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Commit 1262a206 authored by Ben Skeggs's avatar Ben Skeggs
Browse files

drm/nv40/pm: write nv40-specific reclocking routines 



Not 100% perfect yet, but a good start towards what it'll look like in the
end.

Actually seems stable on a NV44 I have here, as much as running around OA
for a fair amount of time constantly switching between performance levels
can prove..

My NV49 isn't quite so happy, and semaphores mess up somehow (sometimes) as
a result of the memory reclocking.

Signed-off-by: default avatarBen Skeggs <bskeggs@redhat.com>
parent 9f403603

drivers/gpu/drm/nouveau/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -31,7 +31,7 @@ nouveau-y := nouveau_drv.o nouveau_state.o nouveau_channel.o nouveau_mem.o \ 
             nv04_fbcon.o nv50_fbcon.o nvc0_fbcon.o \

             nv10_gpio.o nv50_gpio.o \

	     nv50_calc.o \

	     nv04_pm.o nv50_pm.o nva3_pm.o nvc0_pm.o \

	     nv04_pm.o nv40_pm.o nv50_pm.o nva3_pm.o nvc0_pm.o \

	     nv50_vram.o nvc0_vram.o \

	     nv50_vm.o nvc0_vm.o

drivers/gpu/drm/nouveau/nouveau_pm.h

+5 −0
Original line number Diff line number Diff line
@@ -52,6 +52,11 @@ void *nv04_pm_clock_pre(struct drm_device *, struct nouveau_pm_level *, 
			u32 id, int khz);

void nv04_pm_clock_set(struct drm_device *, void *);



/* nv40_pm.c */

int nv40_pm_clocks_get(struct drm_device *, struct nouveau_pm_level *);

void *nv40_pm_clocks_pre(struct drm_device *, struct nouveau_pm_level *);

void nv40_pm_clocks_set(struct drm_device *, void *);



/* nv50_pm.c */

int nv50_pm_clock_get(struct drm_device *, u32 id);

void *nv50_pm_clock_pre(struct drm_device *, struct nouveau_pm_level *,

drivers/gpu/drm/nouveau/nouveau_state.c

+3 −3
Original line number Diff line number Diff line
@@ -286,9 +286,9 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev) 
		engine->gpio.get		= nv10_gpio_get;

		engine->gpio.set		= nv10_gpio_set;

		engine->gpio.irq_enable		= NULL;

		engine->pm.clock_get		= nv04_pm_clock_get;

		engine->pm.clock_pre		= nv04_pm_clock_pre;

		engine->pm.clock_set		= nv04_pm_clock_set;

		engine->pm.clocks_get		= nv40_pm_clocks_get;

		engine->pm.clocks_pre		= nv40_pm_clocks_pre;

		engine->pm.clocks_set		= nv40_pm_clocks_set;

		engine->pm.voltage_get		= nouveau_voltage_gpio_get;

		engine->pm.voltage_set		= nouveau_voltage_gpio_set;

		engine->pm.temp_get		= nv40_temp_get;

drivers/gpu/drm/nouveau/nv40_pm.c

0 → 100644
+333 −0
Original line number Diff line number Diff line 
/*

 * Copyright 2011 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 "drmP.h"

#include "nouveau_drv.h"

#include "nouveau_bios.h"

#include "nouveau_pm.h"

#include "nouveau_hw.h"



#define min2(a,b) ((a) < (b) ? (a) : (b))



static u32

read_pll_1(struct drm_device *dev, u32 reg)

{

	u32 ctrl = nv_rd32(dev, reg + 0x00);

	int P = (ctrl & 0x00070000) >> 16;

	int N = (ctrl & 0x0000ff00) >> 8;

	int M = (ctrl & 0x000000ff) >> 0;

	u32 ref = 27000, clk = 0;



	if (ctrl & 0x80000000)

		clk = ref * N / M;



	return clk >> P;

}



static u32

read_pll_2(struct drm_device *dev, u32 reg)

{

	u32 ctrl = nv_rd32(dev, reg + 0x00);

	u32 coef = nv_rd32(dev, reg + 0x04);

	int N2 = (coef & 0xff000000) >> 24;

	int M2 = (coef & 0x00ff0000) >> 16;

	int N1 = (coef & 0x0000ff00) >> 8;

	int M1 = (coef & 0x000000ff) >> 0;

	int P = (ctrl & 0x00070000) >> 16;

	u32 ref = 27000, clk = 0;



	if (ctrl & 0x80000000)

		clk = ref * N1 / M1;



	if (!(ctrl & 0x00000100)) {

		if (ctrl & 0x40000000)

			clk = clk * N2 / M2;

	}



	return clk >> P;

}



static u32

read_clk(struct drm_device *dev, u32 src)

{

	switch (src) {

	case 3:

		return read_pll_2(dev, 0x004000);

	case 2:

		return read_pll_1(dev, 0x004008);

	default:

		break;

	}



	return 0;

}



int

nv40_pm_clocks_get(struct drm_device *dev, struct nouveau_pm_level *perflvl)

{

	u32 ctrl = nv_rd32(dev, 0x00c040);



	perflvl->core   = read_clk(dev, (ctrl & 0x00000003) >> 0);

	perflvl->shader = read_clk(dev, (ctrl & 0x00000030) >> 4);

	perflvl->memory = read_pll_2(dev, 0x4020);

	return 0;

}



struct nv40_pm_state {

	u32 ctrl;

	u32 npll_ctrl;

	u32 npll_coef;

	u32 spll;

	u32 mpll_ctrl;

	u32 mpll_coef;

};



static int

nv40_calc_pll(struct drm_device *dev, u32 reg, struct pll_lims *pll,

	      u32 clk, int *N1, int *M1, int *N2, int *M2, int *log2P)

{

	struct nouveau_pll_vals coef;

	int ret;



	ret = get_pll_limits(dev, reg, pll);

	if (ret)

		return ret;



	if (clk < pll->vco1.maxfreq)

		pll->vco2.maxfreq = 0;



	ret = nouveau_calc_pll_mnp(dev, pll, clk, &coef);

	if (ret == 0)

		return -ERANGE;



	*N1 = coef.N1;

	*M1 = coef.M1;

	if (N2 && M2) {

		if (pll->vco2.maxfreq) {

			*N2 = coef.N2;

			*M2 = coef.M2;

		} else {

			*N2 = 1;

			*M2 = 1;

		}

	}

	*log2P = coef.log2P;

	return 0;

}



void *

nv40_pm_clocks_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl)

{

	struct nv40_pm_state *info;

	struct pll_lims pll;

	int N1, N2, M1, M2, log2P;

	int ret;



	info = kmalloc(sizeof(*info), GFP_KERNEL);

	if (!info)

		return ERR_PTR(-ENOMEM);



	/* core/geometric clock */

	ret = nv40_calc_pll(dev, 0x004000, &pll, perflvl->core,

			    &N1, &M1, &N2, &M2, &log2P);

	if (ret < 0)

		goto out;



	if (N2 == M2) {

		info->npll_ctrl = 0x80000100 | (log2P << 16);

		info->npll_coef = (N1 << 8) | M1;

	} else {

		info->npll_ctrl = 0xc0000000 | (log2P << 16);

		info->npll_coef = (N2 << 24) | (M2 << 16) | (N1 << 8) | M1;

	}



	/* use the second PLL for shader/rop clock, if it differs from core */

	if (perflvl->shader && perflvl->shader != perflvl->core) {

		ret = nv40_calc_pll(dev, 0x004008, &pll, perflvl->shader,

				    &N1, &M1, NULL, NULL, &log2P);

		if (ret < 0)

			goto out;



		info->spll = 0xc0000000 | (log2P << 16) | (N1 << 8) | M1;

		info->ctrl = 0x00000223;

	} else {

		info->spll = 0x00000000;

		info->ctrl = 0x00000333;

	}



	/* memory clock */

	ret = nv40_calc_pll(dev, 0x004020, &pll, perflvl->memory,

			    &N1, &M1, &N2, &M2, &log2P);

	if (ret < 0)

		goto out;



	info->mpll_ctrl  = 0x80000000 | (log2P << 16);

	info->mpll_ctrl |= min2(pll.log2p_bias + log2P, pll.max_log2p) << 20;

	if (N2 == M2) {

		info->mpll_ctrl |= 0x00000100;

		info->mpll_coef  = (N1 << 8) | M1;

	} else {

		info->mpll_ctrl |= 0x40000000;

		info->mpll_coef  = (N2 << 24) | (M2 << 16) | (N1 << 8) | M1;

	}



out:

	if (ret < 0) {

		kfree(info);

		info = ERR_PTR(ret);

	}

	return info;

}



static bool

nv40_pm_gr_idle(void *data)

{

	struct drm_device *dev = data;



	if ((nv_rd32(dev, 0x400760) & 0x000000f0) >> 4 !=

	    (nv_rd32(dev, 0x400760) & 0x0000000f))

		return false;



	if (nv_rd32(dev, 0x400700))

		return false;



	return true;

}



void

nv40_pm_clocks_set(struct drm_device *dev, void *pre_state)

{

	struct drm_nouveau_private *dev_priv = dev->dev_private;

	struct nv40_pm_state *info = pre_state;

	unsigned long flags;

	u32 crtc_mask = 0;

	u8 sr1[2];

	int i;



	/* determine which CRTCs are active, fetch VGA_SR1 for each */

	for (i = 0; i < 2; i++) {

		u32 vbl = nv_rd32(dev, 0x600808 + (i * 0x2000));

		u32 cnt = 0;

		do {

			if (vbl != nv_rd32(dev, 0x600808 + (i * 0x2000))) {

				nv_wr08(dev, 0x0c03c4 + (i * 0x2000), 0x01);

				sr1[i] = nv_rd08(dev, 0x0c03c5 + (i * 0x2000));

				if (!(sr1[i] & 0x20))

					crtc_mask |= (1 << i);

				break;

			}

			udelay(1);

		} while (cnt++ < 32);

	}



	/* halt and idle engines */

	spin_lock_irqsave(&dev_priv->context_switch_lock, flags);

	nv_mask(dev, 0x002500, 0x00000001, 0x00000000);

	if (!nv_wait(dev, 0x002500, 0x00000010, 0x00000000))

		goto resume;

	nv_mask(dev, 0x003220, 0x00000001, 0x00000000);

	if (!nv_wait(dev, 0x003220, 0x00000010, 0x00000000))

		goto resume;

	nv_mask(dev, 0x003200, 0x00000001, 0x00000000);

	nv04_fifo_cache_pull(dev, false);



	if (!nv_wait_cb(dev, nv40_pm_gr_idle, dev))

		goto resume;



	/* set engine clocks */

	nv_mask(dev, 0x00c040, 0x00000333, 0x00000000);

	nv_wr32(dev, 0x004004, info->npll_coef);

	nv_mask(dev, 0x004000, 0xc0070100, info->npll_ctrl);

	nv_mask(dev, 0x004008, 0xc007ffff, info->spll);

	mdelay(5);

	nv_mask(dev, 0x00c040, 0x00000333, info->ctrl);



	/* wait for vblank start on active crtcs, disable memory access */

	for (i = 0; i < 2; i++) {

		if (!(crtc_mask & (1 << i)))

			continue;

		nv_wait(dev, 0x600808 + (i * 0x2000), 0x00010000, 0x00000000);

		nv_wait(dev, 0x600808 + (i * 0x2000), 0x00010000, 0x00010000);

		nv_wr08(dev, 0x0c03c4 + (i * 0x2000), 0x01);

		nv_wr08(dev, 0x0c03c5 + (i * 0x2000), sr1[i] | 0x20);

	}



	/* prepare ram for reclocking */

	nv_wr32(dev, 0x1002d4, 0x00000001); /* precharge */

	nv_wr32(dev, 0x1002d0, 0x00000001); /* refresh */

	nv_wr32(dev, 0x1002d0, 0x00000001); /* refresh */

	nv_mask(dev, 0x100210, 0x80000000, 0x00000000); /* no auto refresh */

	nv_wr32(dev, 0x1002dc, 0x00000001); /* enable self-refresh */



	/* change the PLL of each memory partition */

	nv_mask(dev, 0x00c040, 0x0000c000, 0x00000000);

	switch (dev_priv->chipset) {

	case 0x40:

	case 0x45:

	case 0x41:

	case 0x42:

	case 0x47:

		nv_mask(dev, 0x004044, 0xc0771100, info->mpll_ctrl);

		nv_mask(dev, 0x00402c, 0xc0771100, info->mpll_ctrl);

		nv_wr32(dev, 0x004048, info->mpll_coef);

		nv_wr32(dev, 0x004030, info->mpll_coef);

	case 0x43:

	case 0x49:

	case 0x4b:

		nv_mask(dev, 0x004038, 0xc0771100, info->mpll_ctrl);

		nv_wr32(dev, 0x00403c, info->mpll_coef);

	default:

		nv_mask(dev, 0x004020, 0xc0771100, info->mpll_ctrl);

		nv_wr32(dev, 0x004024, info->mpll_coef);

		break;

	}

	udelay(100);

	nv_mask(dev, 0x00c040, 0x0000c000, 0x0000c000);



	/* re-enable normal operation of memory controller */

	nv_wr32(dev, 0x1002dc, 0x00000000);

	nv_mask(dev, 0x100210, 0x80000000, 0x80000000);

	udelay(100);



	/* make sure we're in vblank (hopefully the same one as before), and

	 * then re-enable crtc memory access

	 */

	for (i = 0; i < 2; i++) {

		if (!(crtc_mask & (1 << i)))

			continue;

		nv_wait(dev, 0x600808 + (i * 0x2000), 0x00010000, 0x00010000);

		nv_wr08(dev, 0x0c03c4 + (i * 0x2000), 0x01);

		nv_wr08(dev, 0x0c03c5 + (i * 0x2000), sr1[i]);

	}



	/* resume engines */

resume:

	nv_wr32(dev, 0x003250, 0x00000001);

	nv_mask(dev, 0x003220, 0x00000001, 0x00000001);

	nv_wr32(dev, 0x003200, 0x00000001);

	nv_wr32(dev, 0x002500, 0x00000001);

	spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);



	kfree(info);

}