/*
* GP10B RPFB
*
* Copyright (c) 2015, 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 <linux/pm_runtime.h>
#include <linux/dma-mapping.h>
#include "gk20a/gk20a.h"
#include "rpfb_gp10b.h"
#include "hw_fifo_gp10b.h"
#include "hw_fb_gp10b.h"
#include "hw_bus_gp10b.h"
#include "hw_gmmu_gp10b.h"
int gp10b_replayable_pagefault_buffer_init(struct gk20a *g)
{
u32 addr_lo;
u32 addr_hi;
struct vm_gk20a *vm = &g->mm.bar2.vm;
int err;
size_t rbfb_size = NV_UVM_FAULT_BUF_SIZE *
fifo_replay_fault_buffer_size_hw_entries_v();
gk20a_dbg_fn("");
if (!g->mm.bar2_desc.gpu_va) {
err = gk20a_gmmu_alloc_map_sys(vm, rbfb_size,
&g->mm.bar2_desc);
if (err) {
dev_err(dev_from_gk20a(g),
"%s Error in replayable fault buffer\n", __func__);
return err;
}
}
addr_lo = u64_lo32(g->mm.bar2_desc.gpu_va >> 12);
addr_hi = u64_hi32(g->mm.bar2_desc.gpu_va);
gk20a_writel(g, fifo_replay_fault_buffer_hi_r(),
fifo_replay_fault_buffer_hi_base_f(addr_hi));
gk20a_writel(g, fifo_replay_fault_buffer_lo_r(),
fifo_replay_fault_buffer_lo_base_f(addr_lo) |
fifo_replay_fault_buffer_lo_enable_true_v());
gk20a_dbg_fn("done");
return 0;
}
void gp10b_replayable_pagefault_buffer_deinit(struct gk20a *g)
{
struct vm_gk20a *vm = &g->mm.bar2.vm;
gk20a_gmmu_unmap_free(vm, &g->mm.bar2_desc);
}
u32 gp10b_replayable_pagefault_buffer_get_index(struct gk20a *g)
{
u32 get_idx = 0;
gk20a_dbg_fn("");
get_idx = gk20a_readl(g, fifo_replay_fault_buffer_get_r());
if (get_idx >= fifo_replay_fault_buffer_size_hw_entries_v())
dev_err(dev_from_gk20a(g), "%s Error in replayable fault buffer\n",
__func__);
gk20a_dbg_fn("done");
return get_idx;
}
u32 gp10b_replayable_pagefault_buffer_put_index(struct gk20a *g)
{
u32 put_idx = 0;
gk20a_dbg_fn("");
put_idx = gk20a_readl(g, fifo_replay_fault_buffer_put_r());
if (put_idx >= fifo_replay_fault_buffer_size_hw_entries_v())
dev_err(dev_from_gk20a(g), "%s Error in UVM\n",
__func__);
gk20a_dbg_fn("done");
return put_idx;
}
bool gp10b_replayable_pagefault_buffer_is_empty(struct gk20a *g)
{
u32 get_idx = gk20a_readl(g, fifo_replay_fault_buffer_get_r());
u32 put_idx = gk20a_readl(g, fifo_replay_fault_buffer_put_r());
return (get_idx == put_idx ? true : false);
}
bool gp10b_replayable_pagefault_buffer_is_full(struct gk20a *g)
{
u32 get_idx = gk20a_readl(g, fifo_replay_fault_buffer_get_r());
u32 put_idx = gk20a_readl(g, fifo_replay_fault_buffer_put_r());
u32 hw_entries = gk20a_readl(g, fifo_replay_fault_buffer_size_r());
return (get_idx == ((put_idx + 1) % hw_entries) ? true : false);
}
bool gp10b_replayable_pagefault_buffer_is_overflow(struct gk20a *g)
{
u32 info = gk20a_readl(g, fifo_replay_fault_buffer_info_r());
return fifo_replay_fault_buffer_info_overflow_f(info);
}
void gp10b_replayable_pagefault_buffer_clear_overflow(struct gk20a *g)
{
u32 info = gk20a_readl(g, fifo_replay_fault_buffer_info_r());
info |= fifo_replay_fault_buffer_info_overflow_clear_v();
gk20a_writel(g, fifo_replay_fault_buffer_info_r(), info);
}
void gp10b_replayable_pagefault_buffer_info(struct gk20a *g)
{
gk20a_dbg_fn("");
pr_info("rpfb low: 0x%x\n",
(gk20a_readl(g, fifo_replay_fault_buffer_lo_r()) >> 12));
pr_info("rpfb hi: 0x%x\n",
gk20a_readl(g, fifo_replay_fault_buffer_hi_r()));
pr_info("rpfb enabled: 0x%x\n",
(gk20a_readl(g, fifo_replay_fault_buffer_lo_r()) & 0x1));
pr_info("rpfb size: %d\n",
gk20a_readl(g, fifo_replay_fault_buffer_size_r()));
pr_info("rpfb get index: %d\n",
gp10b_replayable_pagefault_buffer_get_index(g));
pr_info("rpfb put index: %d\n",
gp10b_replayable_pagefault_buffer_put_index(g));
pr_info("rpfb empty: %d\n",
gp10b_replayable_pagefault_buffer_is_empty(g));
pr_info("rpfb full %d\n",
gp10b_replayable_pagefault_buffer_is_full(g));
pr_info("rpfb overflow %d\n",
gp10b_replayable_pagefault_buffer_is_overflow(g));
gk20a_dbg_fn("done");
}
