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/*
* GK20A Cycle stats snapshots support (subsystem for gr_gk20a).
*
* Copyright (c) 2016, 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef CSS_GR_GK20A_H
#define CSS_GR_GK20A_H
/* the minimal size of HW buffer - should be enough to avoid HW overflows */
#define CSS_MIN_HW_SNAPSHOT_SIZE (8 * 1024 * 1024)
/* cycle stats fifo header (must match NvSnapshotBufferFifo) */
struct gk20a_cs_snapshot_fifo {
/* layout description of the buffer */
u32 start;
u32 end;
/* snafu bits */
u32 hw_overflow_events_occured;
u32 sw_overflow_events_occured;
/* the kernel copies new entries to put and
* increment the put++. if put == get then
* overflowEventsOccured++
*/
u32 put;
u32 _reserved10;
u32 _reserved11;
u32 _reserved12;
/* the driver/client reads from get until
* put==get, get++ */
u32 get;
u32 _reserved20;
u32 _reserved21;
u32 _reserved22;
/* unused */
u32 _reserved30;
u32 _reserved31;
u32 _reserved32;
u32 _reserved33;
};
/* cycle stats fifo entry (must match NvSnapshotBufferFifoEntry) */
struct gk20a_cs_snapshot_fifo_entry {
/* global 48 timestamp */
u32 timestamp31_00:32;
u32 timestamp39_32:8;
/* id of perfmon, should correlate with CSS_MAX_PERFMON_IDS */
u32 perfmon_id:8;
/* typically samples_counter is wired to #pmtrigger count */
u32 samples_counter:12;
/* DS=Delay Sample, SZ=Size (0=32B, 1=16B) */
u32 ds:1;
u32 sz:1;
u32 zero0:1;
u32 zero1:1;
/* counter results */
u32 event_cnt:32;
u32 trigger0_cnt:32;
u32 trigger1_cnt:32;
u32 sample_cnt:32;
/* Local PmTrigger results for Maxwell+ or padding otherwise */
u16 local_trigger_b_count:16;
u16 book_mark_b:16;
u16 local_trigger_a_count:16;
u16 book_mark_a:16;
};
/* cycle stats snapshot client data (e.g. associated with channel) */
struct gk20a_cs_snapshot_client {
struct nvgpu_list_node list;
u32 dmabuf_fd;
struct dma_buf *dma_handler;
struct gk20a_cs_snapshot_fifo *snapshot;
u32 snapshot_size;
u32 perfmon_start;
u32 perfmon_count;
};
static inline struct gk20a_cs_snapshot_client *
gk20a_cs_snapshot_client_from_list(struct nvgpu_list_node *node)
{
return (struct gk20a_cs_snapshot_client *)
((uintptr_t)node - offsetof(struct gk20a_cs_snapshot_client, list));
};
/* should correlate with size of gk20a_cs_snapshot_fifo_entry::perfmon_id */
#define CSS_MAX_PERFMON_IDS 256
/* local definitions to avoid hardcodes sizes and shifts */
#define PM_BITMAP_SIZE DIV_ROUND_UP(CSS_MAX_PERFMON_IDS, BITS_PER_LONG)
/* cycle stats snapshot control structure for one HW entry and many clients */
struct gk20a_cs_snapshot {
unsigned long perfmon_ids[PM_BITMAP_SIZE];
struct nvgpu_list_node clients;
struct mem_desc hw_memdesc;
/* pointer to allocated cpu_va memory where GPU place data */
struct gk20a_cs_snapshot_fifo_entry *hw_snapshot;
struct gk20a_cs_snapshot_fifo_entry *hw_end;
struct gk20a_cs_snapshot_fifo_entry *hw_get;
};
void gk20a_init_css_ops(struct gpu_ops *gops);
#endif /* CSS_GR_GK20A_H */
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