From 8fe7abebbbbfdc8b1acedd41aa8ac1926a24dc93 Mon Sep 17 00:00:00 2001 From: Seshendra Gadagottu Date: Fri, 6 Feb 2015 12:39:05 -0800 Subject: gpu: nvgpu: gp10b: Add replayable pagefault buffer Add support for replayable fault buffer and enable it. Bug 1587836 Change-Id: Iee4ba42ab175c0d72d2c041fdb3ac9d845358847 Signed-off-by: Seshendra Gadagottu Reviewed-on: http://git-master/r/661668 Reviewed-by: Automatic_Commit_Validation_User GVS: Gerrit_Virtual_Submit Reviewed-by: Terje Bergstrom --- drivers/gpu/nvgpu/gp10b/rpfb_gp10b.c | 146 +++++++++++++++++++++++++++++++++++ 1 file changed, 146 insertions(+) create mode 100644 drivers/gpu/nvgpu/gp10b/rpfb_gp10b.c (limited to 'drivers/gpu/nvgpu/gp10b/rpfb_gp10b.c') diff --git a/drivers/gpu/nvgpu/gp10b/rpfb_gp10b.c b/drivers/gpu/nvgpu/gp10b/rpfb_gp10b.c new file mode 100644 index 00000000..ba91403c --- /dev/null +++ b/drivers/gpu/nvgpu/gp10b/rpfb_gp10b.c @@ -0,0 +1,146 @@ +/* + * 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 +#include +#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(""); + + err = gk20a_gmmu_alloc_map(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"); +} -- cgit v1.2.2