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/*
* GV100 FB
*
* Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#include <nvgpu/types.h>
#include <nvgpu/dma.h>
#include <nvgpu/log.h>
#include <nvgpu/enabled.h>
#include <nvgpu/gmmu.h>
#include "gk20a/gk20a.h"
#include "gv11b/fb_gv11b.h"
#include "gv100/fb_gv100.h"
#include <nvgpu/hw/gv100/hw_fb_gv100.h>
#define HW_SCRUB_TIMEOUT_DEFAULT 100 /* usec */
#define HW_SCRUB_TIMEOUT_MAX 2000000 /* usec */
static void gv100_fb_reset(struct gk20a *g)
{
u32 val;
int retries = HW_SCRUB_TIMEOUT_MAX / HW_SCRUB_TIMEOUT_DEFAULT;
nvgpu_info(g, "reset gv100 fb");
/* wait for memory to be accessible */
do {
u32 w = gk20a_readl(g, fb_niso_scrub_status_r());
if (fb_niso_scrub_status_flag_v(w)) {
nvgpu_info(g, "done");
break;
}
nvgpu_udelay(HW_SCRUB_TIMEOUT_DEFAULT);
} while (--retries);
val = gk20a_readl(g, fb_mmu_priv_level_mask_r());
val &= ~fb_mmu_priv_level_mask_write_violation_m();
gk20a_writel(g, fb_mmu_priv_level_mask_r(), val);
}
void gv100_init_fb(struct gpu_ops *gops)
{
gv11b_init_fb(gops);
gops->fb.reset = gv100_fb_reset;
}
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