/*
* GV11B MMU
*
* Copyright (c) 2016-2018, NVIDIA CORPORATION. All rights reserved.
*
* 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 AUTHORS OR COPYRIGHT HOLDERS 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.
*/
#include <nvgpu/kmem.h>
#include <nvgpu/dma.h>
#include <nvgpu/log.h>
#include <nvgpu/mm.h>
#include "gk20a/gk20a.h"
#include "gk20a/mm_gk20a.h"
#include "gp10b/mm_gp10b.h"
#include "gp10b/mc_gp10b.h"
#include "mm_gv11b.h"
#include "fb_gv11b.h"
#include <nvgpu/hw/gv11b/hw_fb_gv11b.h>
#include <nvgpu/hw/gv11b/hw_gmmu_gv11b.h>
#include <nvgpu/hw/gv11b/hw_bus_gv11b.h>
#define NVGPU_L3_ALLOC_BIT BIT(36)
bool gv11b_mm_is_bar1_supported(struct gk20a *g)
{
return false;
}
void gv11b_init_inst_block(struct nvgpu_mem *inst_block,
struct vm_gk20a *vm, u32 big_page_size)
{
struct gk20a *g = gk20a_from_vm(vm);
gk20a_dbg_info("inst block phys = 0x%llx, kv = 0x%p",
nvgpu_inst_block_addr(g, inst_block), inst_block->cpu_va);
g->ops.mm.init_pdb(g, inst_block, vm);
if (big_page_size && g->ops.mm.set_big_page_size)
g->ops.mm.set_big_page_size(g, inst_block, big_page_size);
}
bool gv11b_mm_mmu_fault_pending(struct gk20a *g)
{
return gv11b_fb_mmu_fault_pending(g);
}
void gv11b_mm_fault_info_mem_destroy(struct gk20a *g)
{
nvgpu_log_fn(g, " ");
nvgpu_mutex_acquire(&g->mm.hub_isr_mutex);
gv11b_fb_disable_hub_intr(g, STALL_REG_INDEX, HUB_INTR_TYPE_OTHER |
HUB_INTR_TYPE_NONREPLAY | HUB_INTR_TYPE_REPLAY);
nvgpu_kfree(g, g->mm.fault_info[FAULT_TYPE_OTHER_AND_NONREPLAY]);
g->mm.fault_info[FAULT_TYPE_OTHER_AND_NONREPLAY] = NULL;
g->mm.fault_info[FAULT_TYPE_REPLAY] = NULL;
nvgpu_mutex_release(&g->mm.hub_isr_mutex);
nvgpu_mutex_destroy(&g->mm.hub_isr_mutex);
}
static int gv11b_mm_mmu_fault_info_buf_init(struct gk20a *g,
u32 *hub_intr_types)
{
struct mmu_fault_info *fault_info_mem;
fault_info_mem = nvgpu_kzalloc(g, sizeof(struct mmu_fault_info) *
FAULT_TYPE_NUM);
if (!fault_info_mem) {
nvgpu_log_info(g, "failed to alloc shadow fault info");
return -ENOMEM;
}
/* shadow buffer for copying mmu fault info */
g->mm.fault_info[FAULT_TYPE_OTHER_AND_NONREPLAY] =
&fault_info_mem[FAULT_TYPE_OTHER_AND_NONREPLAY];
g->mm.fault_info[FAULT_TYPE_REPLAY] =
&fault_info_mem[FAULT_TYPE_REPLAY];
*hub_intr_types |= HUB_INTR_TYPE_OTHER;
return 0;
}
static void gv11b_mm_mmu_hw_fault_buf_init(struct gk20a *g,
u32 *hub_intr_types)
{
struct vm_gk20a *vm = g->mm.bar2.vm;
int err = 0;
size_t fb_size;
/* Max entries take care of 1 entry used for full detection */
fb_size = (g->ops.fifo.get_num_fifos(g) + 1) *
gmmu_fault_buf_size_v();
err = nvgpu_dma_alloc_map_sys(vm, fb_size,
&g->mm.hw_fault_buf[FAULT_TYPE_OTHER_AND_NONREPLAY]);
if (err) {
nvgpu_err(g,
"Error in hw mmu fault buf [0] alloc in bar2 vm ");
/* Fault will be snapped in pri reg but not in buffer */
return;
}
*hub_intr_types |= HUB_INTR_TYPE_NONREPLAY;
err = nvgpu_dma_alloc_map_sys(vm, fb_size,
&g->mm.hw_fault_buf[FAULT_TYPE_REPLAY]);
if (err) {
nvgpu_err(g,
"Error in hw mmu fault buf [1] alloc in bar2 vm ");
/* Fault will be snapped in pri reg but not in buffer */
return;
}
*hub_intr_types |= HUB_INTR_TYPE_REPLAY;
}
static void gv11b_mm_mmu_hw_fault_buf_deinit(struct gk20a *g)
{
struct vm_gk20a *vm = g->mm.bar2.vm;
nvgpu_log_fn(g, " ");
gv11b_fb_disable_hub_intr(g, STALL_REG_INDEX, HUB_INTR_TYPE_NONREPLAY |
HUB_INTR_TYPE_REPLAY);
g->mm.hub_intr_types &= (~(HUB_INTR_TYPE_NONREPLAY |
HUB_INTR_TYPE_REPLAY));
if ((gv11b_fb_is_fault_buf_enabled(g, NONREPLAY_REG_INDEX))) {
gv11b_fb_fault_buf_set_state_hw(g, NONREPLAY_REG_INDEX,
FAULT_BUF_DISABLED);
}
if ((gv11b_fb_is_fault_buf_enabled(g, REPLAY_REG_INDEX))) {
gv11b_fb_fault_buf_set_state_hw(g, REPLAY_REG_INDEX,
FAULT_BUF_DISABLED);
}
if (nvgpu_mem_is_valid(
&g->mm.hw_fault_buf[FAULT_TYPE_OTHER_AND_NONREPLAY]))
nvgpu_dma_unmap_free(vm,
&g->mm.hw_fault_buf[FAULT_TYPE_OTHER_AND_NONREPLAY]);
if (nvgpu_mem_is_valid(&g->mm.hw_fault_buf[FAULT_TYPE_REPLAY]))
nvgpu_dma_unmap_free(vm,
&g->mm.hw_fault_buf[FAULT_TYPE_REPLAY]);
}
void gv11b_mm_remove_bar2_vm(struct gk20a *g)
{
struct mm_gk20a *mm = &g->mm;
nvgpu_log_fn(g, " ");
gv11b_mm_mmu_hw_fault_buf_deinit(g);
nvgpu_free_inst_block(g, &mm->bar2.inst_block);
nvgpu_vm_put(mm->bar2.vm);
}
static void gv11b_mm_mmu_fault_setup_hw(struct gk20a *g)
{
if (nvgpu_mem_is_valid(
&g->mm.hw_fault_buf[FAULT_TYPE_OTHER_AND_NONREPLAY]))
gv11b_fb_fault_buf_configure_hw(g, NONREPLAY_REG_INDEX);
if (nvgpu_mem_is_valid(&g->mm.hw_fault_buf[FAULT_TYPE_REPLAY]))
gv11b_fb_fault_buf_configure_hw(g, REPLAY_REG_INDEX);
}
static int gv11b_mm_mmu_fault_setup_sw(struct gk20a *g)
{
int err;
nvgpu_log_fn(g, " ");
nvgpu_mutex_init(&g->mm.hub_isr_mutex);
g->mm.hub_intr_types = HUB_INTR_TYPE_ECC_UNCORRECTED;
err = gv11b_mm_mmu_fault_info_buf_init(g, &g->mm.hub_intr_types);
if (!err)
gv11b_mm_mmu_hw_fault_buf_init(g, &g->mm.hub_intr_types);
return err;
}
int gv11b_init_mm_setup_hw(struct gk20a *g)
{
int err = 0;
nvgpu_log_fn(g, " ");
g->ops.fb.set_mmu_page_size(g);
g->ops.fb.init_hw(g);
err = g->ops.mm.init_bar2_mm_hw_setup(g);
if (err)
return err;
if (gk20a_mm_fb_flush(g) || gk20a_mm_fb_flush(g))
return -EBUSY;
err = gv11b_mm_mmu_fault_setup_sw(g);
if (!err)
gv11b_mm_mmu_fault_setup_hw(g);
nvgpu_log_fn(g, "end");
return err;
}
void gv11b_mm_l2_flush(struct gk20a *g, bool invalidate)
{
nvgpu_log(g, gpu_dbg_fn, "gv11b_mm_l2_flush");
g->ops.mm.fb_flush(g);
gk20a_mm_l2_flush(g, invalidate);
g->ops.mm.fb_flush(g);
}
/*
* On Volta the GPU determines whether to do L3 allocation for a mapping by
* checking bit 36 of the phsyical address. So if a mapping should allocte lines
* in the L3 this bit must be set.
*/
u64 gv11b_gpu_phys_addr(struct gk20a *g,
struct nvgpu_gmmu_attrs *attrs, u64 phys)
{
if (attrs && attrs->l3_alloc)
return phys | NVGPU_L3_ALLOC_BIT;
return phys;
}
int gv11b_init_bar2_mm_hw_setup(struct gk20a *g)
{
struct mm_gk20a *mm = &g->mm;
struct nvgpu_mem *inst_block = &mm->bar2.inst_block;
u64 inst_pa = nvgpu_inst_block_addr(g, inst_block);
u32 reg_val;
struct nvgpu_timeout timeout;
u32 delay = GR_IDLE_CHECK_DEFAULT;
nvgpu_log_fn(g, " ");
g->ops.fb.set_mmu_page_size(g);
inst_pa = (u32)(inst_pa >> bus_bar2_block_ptr_shift_v());
nvgpu_log_info(g, "bar2 inst block ptr: 0x%08x", (u32)inst_pa);
gk20a_writel(g, bus_bar2_block_r(),
nvgpu_aperture_mask(g, inst_block,
bus_bar2_block_target_sys_mem_ncoh_f(),
bus_bar2_block_target_vid_mem_f()) |
bus_bar2_block_mode_virtual_f() |
bus_bar2_block_ptr_f(inst_pa));
/* This is needed as BAR1 support is removed and there is no way
* to know if gpu successfully accessed memory.
* To avoid deadlocks and non-deterministic virtual address translation
* behavior, after writing BAR2_BLOCK to bind BAR2 to a virtual address
* space, SW must ensure that the bind has completed prior to issuing
* any further BAR2 requests by polling for both
* BUS_BIND_STATUS_BAR2_PENDING to return to EMPTY and
* BUS_BIND_STATUS_BAR2_OUTSTANDING to return to FALSE
*/
nvgpu_timeout_init(g, &timeout, gk20a_get_gr_idle_timeout(g),
NVGPU_TIMER_CPU_TIMER);
nvgpu_log_info(g, "check bar2 bind status");
do {
reg_val = gk20a_readl(g, bus_bind_status_r());
if (!((reg_val & bus_bind_status_bar2_pending_busy_f()) ||
(reg_val & bus_bind_status_bar2_outstanding_true_f())))
return 0;
nvgpu_usleep_range(delay, delay * 2);
delay = min_t(u32, delay << 1, GR_IDLE_CHECK_MAX);
} while (!nvgpu_timeout_expired_msg(&timeout, "bar2 bind timedout"));
nvgpu_err(g, "bar2 bind failed. gpu unable to access memory");
return -EBUSY;
}