forked from Minki/linux
c9224faa59
Beignet needs these in order to program the L3 cache config for OpenCL workloads, particularly when using SLM. Signed-off-by: Brad Volkin <bradley.d.volkin@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
1065 lines
31 KiB
C
1065 lines
31 KiB
C
/*
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* Copyright © 2013 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Brad Volkin <bradley.d.volkin@intel.com>
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*
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*/
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#include "i915_drv.h"
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/**
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* DOC: batch buffer command parser
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*
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* Motivation:
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* Certain OpenGL features (e.g. transform feedback, performance monitoring)
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* require userspace code to submit batches containing commands such as
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* MI_LOAD_REGISTER_IMM to access various registers. Unfortunately, some
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* generations of the hardware will noop these commands in "unsecure" batches
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* (which includes all userspace batches submitted via i915) even though the
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* commands may be safe and represent the intended programming model of the
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* device.
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*
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* The software command parser is similar in operation to the command parsing
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* done in hardware for unsecure batches. However, the software parser allows
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* some operations that would be noop'd by hardware, if the parser determines
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* the operation is safe, and submits the batch as "secure" to prevent hardware
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* parsing.
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*
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* Threats:
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* At a high level, the hardware (and software) checks attempt to prevent
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* granting userspace undue privileges. There are three categories of privilege.
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*
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* First, commands which are explicitly defined as privileged or which should
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* only be used by the kernel driver. The parser generally rejects such
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* commands, though it may allow some from the drm master process.
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*
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* Second, commands which access registers. To support correct/enhanced
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* userspace functionality, particularly certain OpenGL extensions, the parser
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* provides a whitelist of registers which userspace may safely access (for both
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* normal and drm master processes).
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*
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* Third, commands which access privileged memory (i.e. GGTT, HWS page, etc).
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* The parser always rejects such commands.
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*
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* The majority of the problematic commands fall in the MI_* range, with only a
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* few specific commands on each ring (e.g. PIPE_CONTROL and MI_FLUSH_DW).
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*
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* Implementation:
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* Each ring maintains tables of commands and registers which the parser uses in
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* scanning batch buffers submitted to that ring.
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*
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* Since the set of commands that the parser must check for is significantly
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* smaller than the number of commands supported, the parser tables contain only
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* those commands required by the parser. This generally works because command
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* opcode ranges have standard command length encodings. So for commands that
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* the parser does not need to check, it can easily skip them. This is
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* implementated via a per-ring length decoding vfunc.
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*
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* Unfortunately, there are a number of commands that do not follow the standard
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* length encoding for their opcode range, primarily amongst the MI_* commands.
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* To handle this, the parser provides a way to define explicit "skip" entries
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* in the per-ring command tables.
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*
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* Other command table entries map fairly directly to high level categories
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* mentioned above: rejected, master-only, register whitelist. The parser
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* implements a number of checks, including the privileged memory checks, via a
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* general bitmasking mechanism.
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*/
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#define STD_MI_OPCODE_MASK 0xFF800000
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#define STD_3D_OPCODE_MASK 0xFFFF0000
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#define STD_2D_OPCODE_MASK 0xFFC00000
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#define STD_MFX_OPCODE_MASK 0xFFFF0000
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#define CMD(op, opm, f, lm, fl, ...) \
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{ \
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.flags = (fl) | ((f) ? CMD_DESC_FIXED : 0), \
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.cmd = { (op), (opm) }, \
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.length = { (lm) }, \
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__VA_ARGS__ \
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}
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/* Convenience macros to compress the tables */
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#define SMI STD_MI_OPCODE_MASK
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#define S3D STD_3D_OPCODE_MASK
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#define S2D STD_2D_OPCODE_MASK
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#define SMFX STD_MFX_OPCODE_MASK
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#define F true
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#define S CMD_DESC_SKIP
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#define R CMD_DESC_REJECT
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#define W CMD_DESC_REGISTER
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#define B CMD_DESC_BITMASK
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#define M CMD_DESC_MASTER
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/* Command Mask Fixed Len Action
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---------------------------------------------------------- */
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static const struct drm_i915_cmd_descriptor common_cmds[] = {
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CMD( MI_NOOP, SMI, F, 1, S ),
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CMD( MI_USER_INTERRUPT, SMI, F, 1, R ),
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CMD( MI_WAIT_FOR_EVENT, SMI, F, 1, M ),
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CMD( MI_ARB_CHECK, SMI, F, 1, S ),
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CMD( MI_REPORT_HEAD, SMI, F, 1, S ),
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CMD( MI_SUSPEND_FLUSH, SMI, F, 1, S ),
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CMD( MI_SEMAPHORE_MBOX, SMI, !F, 0xFF, R ),
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CMD( MI_STORE_DWORD_INDEX, SMI, !F, 0xFF, R ),
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CMD( MI_LOAD_REGISTER_IMM(1), SMI, !F, 0xFF, W,
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.reg = { .offset = 1, .mask = 0x007FFFFC } ),
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CMD( MI_STORE_REGISTER_MEM(1), SMI, !F, 0xFF, W | B,
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.reg = { .offset = 1, .mask = 0x007FFFFC },
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.bits = {{
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.offset = 0,
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.mask = MI_GLOBAL_GTT,
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.expected = 0,
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}}, ),
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CMD( MI_LOAD_REGISTER_MEM, SMI, !F, 0xFF, W | B,
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.reg = { .offset = 1, .mask = 0x007FFFFC },
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.bits = {{
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.offset = 0,
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.mask = MI_GLOBAL_GTT,
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.expected = 0,
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}}, ),
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CMD( MI_BATCH_BUFFER_START, SMI, !F, 0xFF, S ),
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};
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static const struct drm_i915_cmd_descriptor render_cmds[] = {
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CMD( MI_FLUSH, SMI, F, 1, S ),
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CMD( MI_ARB_ON_OFF, SMI, F, 1, R ),
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CMD( MI_PREDICATE, SMI, F, 1, S ),
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CMD( MI_TOPOLOGY_FILTER, SMI, F, 1, S ),
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CMD( MI_DISPLAY_FLIP, SMI, !F, 0xFF, R ),
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CMD( MI_SET_CONTEXT, SMI, !F, 0xFF, R ),
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CMD( MI_URB_CLEAR, SMI, !F, 0xFF, S ),
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CMD( MI_STORE_DWORD_IMM, SMI, !F, 0x3F, B,
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.bits = {{
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.offset = 0,
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.mask = MI_GLOBAL_GTT,
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.expected = 0,
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}}, ),
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CMD( MI_UPDATE_GTT, SMI, !F, 0xFF, R ),
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CMD( MI_CLFLUSH, SMI, !F, 0x3FF, B,
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.bits = {{
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.offset = 0,
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.mask = MI_GLOBAL_GTT,
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.expected = 0,
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}}, ),
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CMD( MI_REPORT_PERF_COUNT, SMI, !F, 0x3F, B,
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.bits = {{
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.offset = 1,
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.mask = MI_REPORT_PERF_COUNT_GGTT,
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.expected = 0,
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}}, ),
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CMD( MI_CONDITIONAL_BATCH_BUFFER_END, SMI, !F, 0xFF, B,
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.bits = {{
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.offset = 0,
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.mask = MI_GLOBAL_GTT,
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.expected = 0,
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}}, ),
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CMD( GFX_OP_3DSTATE_VF_STATISTICS, S3D, F, 1, S ),
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CMD( PIPELINE_SELECT, S3D, F, 1, S ),
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CMD( MEDIA_VFE_STATE, S3D, !F, 0xFFFF, B,
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.bits = {{
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.offset = 2,
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.mask = MEDIA_VFE_STATE_MMIO_ACCESS_MASK,
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.expected = 0,
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}}, ),
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CMD( GPGPU_OBJECT, S3D, !F, 0xFF, S ),
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CMD( GPGPU_WALKER, S3D, !F, 0xFF, S ),
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CMD( GFX_OP_3DSTATE_SO_DECL_LIST, S3D, !F, 0x1FF, S ),
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CMD( GFX_OP_PIPE_CONTROL(5), S3D, !F, 0xFF, B,
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.bits = {{
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.offset = 1,
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.mask = (PIPE_CONTROL_MMIO_WRITE | PIPE_CONTROL_NOTIFY),
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.expected = 0,
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},
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{
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.offset = 1,
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.mask = (PIPE_CONTROL_GLOBAL_GTT_IVB |
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PIPE_CONTROL_STORE_DATA_INDEX),
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.expected = 0,
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.condition_offset = 1,
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.condition_mask = PIPE_CONTROL_POST_SYNC_OP_MASK,
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}}, ),
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};
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static const struct drm_i915_cmd_descriptor hsw_render_cmds[] = {
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CMD( MI_SET_PREDICATE, SMI, F, 1, S ),
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CMD( MI_RS_CONTROL, SMI, F, 1, S ),
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CMD( MI_URB_ATOMIC_ALLOC, SMI, F, 1, S ),
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CMD( MI_RS_CONTEXT, SMI, F, 1, S ),
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CMD( MI_LOAD_SCAN_LINES_INCL, SMI, !F, 0x3F, M ),
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CMD( MI_LOAD_SCAN_LINES_EXCL, SMI, !F, 0x3F, R ),
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CMD( MI_LOAD_REGISTER_REG, SMI, !F, 0xFF, R ),
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CMD( MI_RS_STORE_DATA_IMM, SMI, !F, 0xFF, S ),
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CMD( MI_LOAD_URB_MEM, SMI, !F, 0xFF, S ),
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CMD( MI_STORE_URB_MEM, SMI, !F, 0xFF, S ),
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CMD( GFX_OP_3DSTATE_DX9_CONSTANTF_VS, S3D, !F, 0x7FF, S ),
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CMD( GFX_OP_3DSTATE_DX9_CONSTANTF_PS, S3D, !F, 0x7FF, S ),
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CMD( GFX_OP_3DSTATE_BINDING_TABLE_EDIT_VS, S3D, !F, 0x1FF, S ),
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CMD( GFX_OP_3DSTATE_BINDING_TABLE_EDIT_GS, S3D, !F, 0x1FF, S ),
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CMD( GFX_OP_3DSTATE_BINDING_TABLE_EDIT_HS, S3D, !F, 0x1FF, S ),
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CMD( GFX_OP_3DSTATE_BINDING_TABLE_EDIT_DS, S3D, !F, 0x1FF, S ),
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CMD( GFX_OP_3DSTATE_BINDING_TABLE_EDIT_PS, S3D, !F, 0x1FF, S ),
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};
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static const struct drm_i915_cmd_descriptor video_cmds[] = {
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CMD( MI_ARB_ON_OFF, SMI, F, 1, R ),
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CMD( MI_STORE_DWORD_IMM, SMI, !F, 0xFF, B,
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.bits = {{
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.offset = 0,
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.mask = MI_GLOBAL_GTT,
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.expected = 0,
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}}, ),
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CMD( MI_UPDATE_GTT, SMI, !F, 0x3F, R ),
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CMD( MI_FLUSH_DW, SMI, !F, 0x3F, B,
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.bits = {{
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.offset = 0,
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.mask = MI_FLUSH_DW_NOTIFY,
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.expected = 0,
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},
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{
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.offset = 1,
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.mask = MI_FLUSH_DW_USE_GTT,
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.expected = 0,
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.condition_offset = 0,
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.condition_mask = MI_FLUSH_DW_OP_MASK,
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},
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{
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.offset = 0,
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.mask = MI_FLUSH_DW_STORE_INDEX,
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.expected = 0,
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.condition_offset = 0,
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.condition_mask = MI_FLUSH_DW_OP_MASK,
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}}, ),
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CMD( MI_CONDITIONAL_BATCH_BUFFER_END, SMI, !F, 0xFF, B,
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.bits = {{
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.offset = 0,
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.mask = MI_GLOBAL_GTT,
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.expected = 0,
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}}, ),
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/*
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* MFX_WAIT doesn't fit the way we handle length for most commands.
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* It has a length field but it uses a non-standard length bias.
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* It is always 1 dword though, so just treat it as fixed length.
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*/
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CMD( MFX_WAIT, SMFX, F, 1, S ),
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};
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static const struct drm_i915_cmd_descriptor vecs_cmds[] = {
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CMD( MI_ARB_ON_OFF, SMI, F, 1, R ),
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CMD( MI_STORE_DWORD_IMM, SMI, !F, 0xFF, B,
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.bits = {{
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.offset = 0,
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.mask = MI_GLOBAL_GTT,
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.expected = 0,
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}}, ),
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CMD( MI_UPDATE_GTT, SMI, !F, 0x3F, R ),
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CMD( MI_FLUSH_DW, SMI, !F, 0x3F, B,
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.bits = {{
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.offset = 0,
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.mask = MI_FLUSH_DW_NOTIFY,
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.expected = 0,
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},
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{
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.offset = 1,
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.mask = MI_FLUSH_DW_USE_GTT,
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.expected = 0,
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.condition_offset = 0,
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.condition_mask = MI_FLUSH_DW_OP_MASK,
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},
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{
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.offset = 0,
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.mask = MI_FLUSH_DW_STORE_INDEX,
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.expected = 0,
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.condition_offset = 0,
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.condition_mask = MI_FLUSH_DW_OP_MASK,
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}}, ),
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CMD( MI_CONDITIONAL_BATCH_BUFFER_END, SMI, !F, 0xFF, B,
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.bits = {{
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.offset = 0,
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.mask = MI_GLOBAL_GTT,
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.expected = 0,
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}}, ),
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};
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static const struct drm_i915_cmd_descriptor blt_cmds[] = {
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CMD( MI_DISPLAY_FLIP, SMI, !F, 0xFF, R ),
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CMD( MI_STORE_DWORD_IMM, SMI, !F, 0x3FF, B,
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.bits = {{
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.offset = 0,
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.mask = MI_GLOBAL_GTT,
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.expected = 0,
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}}, ),
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CMD( MI_UPDATE_GTT, SMI, !F, 0x3F, R ),
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CMD( MI_FLUSH_DW, SMI, !F, 0x3F, B,
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.bits = {{
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.offset = 0,
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.mask = MI_FLUSH_DW_NOTIFY,
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.expected = 0,
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},
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{
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.offset = 1,
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.mask = MI_FLUSH_DW_USE_GTT,
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.expected = 0,
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.condition_offset = 0,
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.condition_mask = MI_FLUSH_DW_OP_MASK,
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},
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{
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.offset = 0,
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.mask = MI_FLUSH_DW_STORE_INDEX,
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.expected = 0,
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.condition_offset = 0,
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.condition_mask = MI_FLUSH_DW_OP_MASK,
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}}, ),
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CMD( COLOR_BLT, S2D, !F, 0x3F, S ),
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CMD( SRC_COPY_BLT, S2D, !F, 0x3F, S ),
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};
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static const struct drm_i915_cmd_descriptor hsw_blt_cmds[] = {
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CMD( MI_LOAD_SCAN_LINES_INCL, SMI, !F, 0x3F, M ),
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CMD( MI_LOAD_SCAN_LINES_EXCL, SMI, !F, 0x3F, R ),
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};
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#undef CMD
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#undef SMI
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#undef S3D
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#undef S2D
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#undef SMFX
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#undef F
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#undef S
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#undef R
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#undef W
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#undef B
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#undef M
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static const struct drm_i915_cmd_table gen7_render_cmds[] = {
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{ common_cmds, ARRAY_SIZE(common_cmds) },
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{ render_cmds, ARRAY_SIZE(render_cmds) },
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};
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static const struct drm_i915_cmd_table hsw_render_ring_cmds[] = {
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{ common_cmds, ARRAY_SIZE(common_cmds) },
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{ render_cmds, ARRAY_SIZE(render_cmds) },
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{ hsw_render_cmds, ARRAY_SIZE(hsw_render_cmds) },
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};
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static const struct drm_i915_cmd_table gen7_video_cmds[] = {
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{ common_cmds, ARRAY_SIZE(common_cmds) },
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{ video_cmds, ARRAY_SIZE(video_cmds) },
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};
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static const struct drm_i915_cmd_table hsw_vebox_cmds[] = {
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{ common_cmds, ARRAY_SIZE(common_cmds) },
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{ vecs_cmds, ARRAY_SIZE(vecs_cmds) },
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};
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static const struct drm_i915_cmd_table gen7_blt_cmds[] = {
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{ common_cmds, ARRAY_SIZE(common_cmds) },
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{ blt_cmds, ARRAY_SIZE(blt_cmds) },
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};
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static const struct drm_i915_cmd_table hsw_blt_ring_cmds[] = {
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{ common_cmds, ARRAY_SIZE(common_cmds) },
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{ blt_cmds, ARRAY_SIZE(blt_cmds) },
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{ hsw_blt_cmds, ARRAY_SIZE(hsw_blt_cmds) },
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};
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/*
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* Register whitelists, sorted by increasing register offset.
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*
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* Some registers that userspace accesses are 64 bits. The register
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* access commands only allow 32-bit accesses. Hence, we have to include
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* entries for both halves of the 64-bit registers.
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*/
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/* Convenience macro for adding 64-bit registers */
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#define REG64(addr) (addr), (addr + sizeof(u32))
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static const u32 gen7_render_regs[] = {
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REG64(HS_INVOCATION_COUNT),
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REG64(DS_INVOCATION_COUNT),
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REG64(IA_VERTICES_COUNT),
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REG64(IA_PRIMITIVES_COUNT),
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REG64(VS_INVOCATION_COUNT),
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REG64(GS_INVOCATION_COUNT),
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REG64(GS_PRIMITIVES_COUNT),
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REG64(CL_INVOCATION_COUNT),
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REG64(CL_PRIMITIVES_COUNT),
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REG64(PS_INVOCATION_COUNT),
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REG64(PS_DEPTH_COUNT),
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OACONTROL, /* Only allowed for LRI and SRM. See below. */
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GEN7_3DPRIM_END_OFFSET,
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GEN7_3DPRIM_START_VERTEX,
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GEN7_3DPRIM_VERTEX_COUNT,
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GEN7_3DPRIM_INSTANCE_COUNT,
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GEN7_3DPRIM_START_INSTANCE,
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GEN7_3DPRIM_BASE_VERTEX,
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REG64(GEN7_SO_NUM_PRIMS_WRITTEN(0)),
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REG64(GEN7_SO_NUM_PRIMS_WRITTEN(1)),
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REG64(GEN7_SO_NUM_PRIMS_WRITTEN(2)),
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REG64(GEN7_SO_NUM_PRIMS_WRITTEN(3)),
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REG64(GEN7_SO_PRIM_STORAGE_NEEDED(0)),
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REG64(GEN7_SO_PRIM_STORAGE_NEEDED(1)),
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REG64(GEN7_SO_PRIM_STORAGE_NEEDED(2)),
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REG64(GEN7_SO_PRIM_STORAGE_NEEDED(3)),
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GEN7_SO_WRITE_OFFSET(0),
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|
GEN7_SO_WRITE_OFFSET(1),
|
|
GEN7_SO_WRITE_OFFSET(2),
|
|
GEN7_SO_WRITE_OFFSET(3),
|
|
GEN7_L3SQCREG1,
|
|
GEN7_L3CNTLREG2,
|
|
GEN7_L3CNTLREG3,
|
|
};
|
|
|
|
static const u32 gen7_blt_regs[] = {
|
|
BCS_SWCTRL,
|
|
};
|
|
|
|
static const u32 ivb_master_regs[] = {
|
|
FORCEWAKE_MT,
|
|
DERRMR,
|
|
GEN7_PIPE_DE_LOAD_SL(PIPE_A),
|
|
GEN7_PIPE_DE_LOAD_SL(PIPE_B),
|
|
GEN7_PIPE_DE_LOAD_SL(PIPE_C),
|
|
};
|
|
|
|
static const u32 hsw_master_regs[] = {
|
|
FORCEWAKE_MT,
|
|
DERRMR,
|
|
};
|
|
|
|
#undef REG64
|
|
|
|
static u32 gen7_render_get_cmd_length_mask(u32 cmd_header)
|
|
{
|
|
u32 client = (cmd_header & INSTR_CLIENT_MASK) >> INSTR_CLIENT_SHIFT;
|
|
u32 subclient =
|
|
(cmd_header & INSTR_SUBCLIENT_MASK) >> INSTR_SUBCLIENT_SHIFT;
|
|
|
|
if (client == INSTR_MI_CLIENT)
|
|
return 0x3F;
|
|
else if (client == INSTR_RC_CLIENT) {
|
|
if (subclient == INSTR_MEDIA_SUBCLIENT)
|
|
return 0xFFFF;
|
|
else
|
|
return 0xFF;
|
|
}
|
|
|
|
DRM_DEBUG_DRIVER("CMD: Abnormal rcs cmd length! 0x%08X\n", cmd_header);
|
|
return 0;
|
|
}
|
|
|
|
static u32 gen7_bsd_get_cmd_length_mask(u32 cmd_header)
|
|
{
|
|
u32 client = (cmd_header & INSTR_CLIENT_MASK) >> INSTR_CLIENT_SHIFT;
|
|
u32 subclient =
|
|
(cmd_header & INSTR_SUBCLIENT_MASK) >> INSTR_SUBCLIENT_SHIFT;
|
|
|
|
if (client == INSTR_MI_CLIENT)
|
|
return 0x3F;
|
|
else if (client == INSTR_RC_CLIENT) {
|
|
if (subclient == INSTR_MEDIA_SUBCLIENT)
|
|
return 0xFFF;
|
|
else
|
|
return 0xFF;
|
|
}
|
|
|
|
DRM_DEBUG_DRIVER("CMD: Abnormal bsd cmd length! 0x%08X\n", cmd_header);
|
|
return 0;
|
|
}
|
|
|
|
static u32 gen7_blt_get_cmd_length_mask(u32 cmd_header)
|
|
{
|
|
u32 client = (cmd_header & INSTR_CLIENT_MASK) >> INSTR_CLIENT_SHIFT;
|
|
|
|
if (client == INSTR_MI_CLIENT)
|
|
return 0x3F;
|
|
else if (client == INSTR_BC_CLIENT)
|
|
return 0xFF;
|
|
|
|
DRM_DEBUG_DRIVER("CMD: Abnormal blt cmd length! 0x%08X\n", cmd_header);
|
|
return 0;
|
|
}
|
|
|
|
static bool validate_cmds_sorted(struct intel_engine_cs *ring,
|
|
const struct drm_i915_cmd_table *cmd_tables,
|
|
int cmd_table_count)
|
|
{
|
|
int i;
|
|
bool ret = true;
|
|
|
|
if (!cmd_tables || cmd_table_count == 0)
|
|
return true;
|
|
|
|
for (i = 0; i < cmd_table_count; i++) {
|
|
const struct drm_i915_cmd_table *table = &cmd_tables[i];
|
|
u32 previous = 0;
|
|
int j;
|
|
|
|
for (j = 0; j < table->count; j++) {
|
|
const struct drm_i915_cmd_descriptor *desc =
|
|
&table->table[i];
|
|
u32 curr = desc->cmd.value & desc->cmd.mask;
|
|
|
|
if (curr < previous) {
|
|
DRM_ERROR("CMD: table not sorted ring=%d table=%d entry=%d cmd=0x%08X prev=0x%08X\n",
|
|
ring->id, i, j, curr, previous);
|
|
ret = false;
|
|
}
|
|
|
|
previous = curr;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static bool check_sorted(int ring_id, const u32 *reg_table, int reg_count)
|
|
{
|
|
int i;
|
|
u32 previous = 0;
|
|
bool ret = true;
|
|
|
|
for (i = 0; i < reg_count; i++) {
|
|
u32 curr = reg_table[i];
|
|
|
|
if (curr < previous) {
|
|
DRM_ERROR("CMD: table not sorted ring=%d entry=%d reg=0x%08X prev=0x%08X\n",
|
|
ring_id, i, curr, previous);
|
|
ret = false;
|
|
}
|
|
|
|
previous = curr;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static bool validate_regs_sorted(struct intel_engine_cs *ring)
|
|
{
|
|
return check_sorted(ring->id, ring->reg_table, ring->reg_count) &&
|
|
check_sorted(ring->id, ring->master_reg_table,
|
|
ring->master_reg_count);
|
|
}
|
|
|
|
struct cmd_node {
|
|
const struct drm_i915_cmd_descriptor *desc;
|
|
struct hlist_node node;
|
|
};
|
|
|
|
/*
|
|
* Different command ranges have different numbers of bits for the opcode. For
|
|
* example, MI commands use bits 31:23 while 3D commands use bits 31:16. The
|
|
* problem is that, for example, MI commands use bits 22:16 for other fields
|
|
* such as GGTT vs PPGTT bits. If we include those bits in the mask then when
|
|
* we mask a command from a batch it could hash to the wrong bucket due to
|
|
* non-opcode bits being set. But if we don't include those bits, some 3D
|
|
* commands may hash to the same bucket due to not including opcode bits that
|
|
* make the command unique. For now, we will risk hashing to the same bucket.
|
|
*
|
|
* If we attempt to generate a perfect hash, we should be able to look at bits
|
|
* 31:29 of a command from a batch buffer and use the full mask for that
|
|
* client. The existing INSTR_CLIENT_MASK/SHIFT defines can be used for this.
|
|
*/
|
|
#define CMD_HASH_MASK STD_MI_OPCODE_MASK
|
|
|
|
static int init_hash_table(struct intel_engine_cs *ring,
|
|
const struct drm_i915_cmd_table *cmd_tables,
|
|
int cmd_table_count)
|
|
{
|
|
int i, j;
|
|
|
|
hash_init(ring->cmd_hash);
|
|
|
|
for (i = 0; i < cmd_table_count; i++) {
|
|
const struct drm_i915_cmd_table *table = &cmd_tables[i];
|
|
|
|
for (j = 0; j < table->count; j++) {
|
|
const struct drm_i915_cmd_descriptor *desc =
|
|
&table->table[j];
|
|
struct cmd_node *desc_node =
|
|
kmalloc(sizeof(*desc_node), GFP_KERNEL);
|
|
|
|
if (!desc_node)
|
|
return -ENOMEM;
|
|
|
|
desc_node->desc = desc;
|
|
hash_add(ring->cmd_hash, &desc_node->node,
|
|
desc->cmd.value & CMD_HASH_MASK);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void fini_hash_table(struct intel_engine_cs *ring)
|
|
{
|
|
struct hlist_node *tmp;
|
|
struct cmd_node *desc_node;
|
|
int i;
|
|
|
|
hash_for_each_safe(ring->cmd_hash, i, tmp, desc_node, node) {
|
|
hash_del(&desc_node->node);
|
|
kfree(desc_node);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* i915_cmd_parser_init_ring() - set cmd parser related fields for a ringbuffer
|
|
* @ring: the ringbuffer to initialize
|
|
*
|
|
* Optionally initializes fields related to batch buffer command parsing in the
|
|
* struct intel_engine_cs based on whether the platform requires software
|
|
* command parsing.
|
|
*
|
|
* Return: non-zero if initialization fails
|
|
*/
|
|
int i915_cmd_parser_init_ring(struct intel_engine_cs *ring)
|
|
{
|
|
const struct drm_i915_cmd_table *cmd_tables;
|
|
int cmd_table_count;
|
|
int ret;
|
|
|
|
if (!IS_GEN7(ring->dev))
|
|
return 0;
|
|
|
|
switch (ring->id) {
|
|
case RCS:
|
|
if (IS_HASWELL(ring->dev)) {
|
|
cmd_tables = hsw_render_ring_cmds;
|
|
cmd_table_count =
|
|
ARRAY_SIZE(hsw_render_ring_cmds);
|
|
} else {
|
|
cmd_tables = gen7_render_cmds;
|
|
cmd_table_count = ARRAY_SIZE(gen7_render_cmds);
|
|
}
|
|
|
|
ring->reg_table = gen7_render_regs;
|
|
ring->reg_count = ARRAY_SIZE(gen7_render_regs);
|
|
|
|
if (IS_HASWELL(ring->dev)) {
|
|
ring->master_reg_table = hsw_master_regs;
|
|
ring->master_reg_count = ARRAY_SIZE(hsw_master_regs);
|
|
} else {
|
|
ring->master_reg_table = ivb_master_regs;
|
|
ring->master_reg_count = ARRAY_SIZE(ivb_master_regs);
|
|
}
|
|
|
|
ring->get_cmd_length_mask = gen7_render_get_cmd_length_mask;
|
|
break;
|
|
case VCS:
|
|
cmd_tables = gen7_video_cmds;
|
|
cmd_table_count = ARRAY_SIZE(gen7_video_cmds);
|
|
ring->get_cmd_length_mask = gen7_bsd_get_cmd_length_mask;
|
|
break;
|
|
case BCS:
|
|
if (IS_HASWELL(ring->dev)) {
|
|
cmd_tables = hsw_blt_ring_cmds;
|
|
cmd_table_count = ARRAY_SIZE(hsw_blt_ring_cmds);
|
|
} else {
|
|
cmd_tables = gen7_blt_cmds;
|
|
cmd_table_count = ARRAY_SIZE(gen7_blt_cmds);
|
|
}
|
|
|
|
ring->reg_table = gen7_blt_regs;
|
|
ring->reg_count = ARRAY_SIZE(gen7_blt_regs);
|
|
|
|
if (IS_HASWELL(ring->dev)) {
|
|
ring->master_reg_table = hsw_master_regs;
|
|
ring->master_reg_count = ARRAY_SIZE(hsw_master_regs);
|
|
} else {
|
|
ring->master_reg_table = ivb_master_regs;
|
|
ring->master_reg_count = ARRAY_SIZE(ivb_master_regs);
|
|
}
|
|
|
|
ring->get_cmd_length_mask = gen7_blt_get_cmd_length_mask;
|
|
break;
|
|
case VECS:
|
|
cmd_tables = hsw_vebox_cmds;
|
|
cmd_table_count = ARRAY_SIZE(hsw_vebox_cmds);
|
|
/* VECS can use the same length_mask function as VCS */
|
|
ring->get_cmd_length_mask = gen7_bsd_get_cmd_length_mask;
|
|
break;
|
|
default:
|
|
DRM_ERROR("CMD: cmd_parser_init with unknown ring: %d\n",
|
|
ring->id);
|
|
BUG();
|
|
}
|
|
|
|
BUG_ON(!validate_cmds_sorted(ring, cmd_tables, cmd_table_count));
|
|
BUG_ON(!validate_regs_sorted(ring));
|
|
|
|
ret = init_hash_table(ring, cmd_tables, cmd_table_count);
|
|
if (ret) {
|
|
DRM_ERROR("CMD: cmd_parser_init failed!\n");
|
|
fini_hash_table(ring);
|
|
return ret;
|
|
}
|
|
|
|
ring->needs_cmd_parser = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* i915_cmd_parser_fini_ring() - clean up cmd parser related fields
|
|
* @ring: the ringbuffer to clean up
|
|
*
|
|
* Releases any resources related to command parsing that may have been
|
|
* initialized for the specified ring.
|
|
*/
|
|
void i915_cmd_parser_fini_ring(struct intel_engine_cs *ring)
|
|
{
|
|
if (!ring->needs_cmd_parser)
|
|
return;
|
|
|
|
fini_hash_table(ring);
|
|
}
|
|
|
|
static const struct drm_i915_cmd_descriptor*
|
|
find_cmd_in_table(struct intel_engine_cs *ring,
|
|
u32 cmd_header)
|
|
{
|
|
struct cmd_node *desc_node;
|
|
|
|
hash_for_each_possible(ring->cmd_hash, desc_node, node,
|
|
cmd_header & CMD_HASH_MASK) {
|
|
const struct drm_i915_cmd_descriptor *desc = desc_node->desc;
|
|
u32 masked_cmd = desc->cmd.mask & cmd_header;
|
|
u32 masked_value = desc->cmd.value & desc->cmd.mask;
|
|
|
|
if (masked_cmd == masked_value)
|
|
return desc;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Returns a pointer to a descriptor for the command specified by cmd_header.
|
|
*
|
|
* The caller must supply space for a default descriptor via the default_desc
|
|
* parameter. If no descriptor for the specified command exists in the ring's
|
|
* command parser tables, this function fills in default_desc based on the
|
|
* ring's default length encoding and returns default_desc.
|
|
*/
|
|
static const struct drm_i915_cmd_descriptor*
|
|
find_cmd(struct intel_engine_cs *ring,
|
|
u32 cmd_header,
|
|
struct drm_i915_cmd_descriptor *default_desc)
|
|
{
|
|
const struct drm_i915_cmd_descriptor *desc;
|
|
u32 mask;
|
|
|
|
desc = find_cmd_in_table(ring, cmd_header);
|
|
if (desc)
|
|
return desc;
|
|
|
|
mask = ring->get_cmd_length_mask(cmd_header);
|
|
if (!mask)
|
|
return NULL;
|
|
|
|
BUG_ON(!default_desc);
|
|
default_desc->flags = CMD_DESC_SKIP;
|
|
default_desc->length.mask = mask;
|
|
|
|
return default_desc;
|
|
}
|
|
|
|
static bool valid_reg(const u32 *table, int count, u32 addr)
|
|
{
|
|
if (table && count != 0) {
|
|
int i;
|
|
|
|
for (i = 0; i < count; i++) {
|
|
if (table[i] == addr)
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static u32 *vmap_batch(struct drm_i915_gem_object *obj)
|
|
{
|
|
int i;
|
|
void *addr = NULL;
|
|
struct sg_page_iter sg_iter;
|
|
struct page **pages;
|
|
|
|
pages = drm_malloc_ab(obj->base.size >> PAGE_SHIFT, sizeof(*pages));
|
|
if (pages == NULL) {
|
|
DRM_DEBUG_DRIVER("Failed to get space for pages\n");
|
|
goto finish;
|
|
}
|
|
|
|
i = 0;
|
|
for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents, 0) {
|
|
pages[i] = sg_page_iter_page(&sg_iter);
|
|
i++;
|
|
}
|
|
|
|
addr = vmap(pages, i, 0, PAGE_KERNEL);
|
|
if (addr == NULL) {
|
|
DRM_DEBUG_DRIVER("Failed to vmap pages\n");
|
|
goto finish;
|
|
}
|
|
|
|
finish:
|
|
if (pages)
|
|
drm_free_large(pages);
|
|
return (u32*)addr;
|
|
}
|
|
|
|
/**
|
|
* i915_needs_cmd_parser() - should a given ring use software command parsing?
|
|
* @ring: the ring in question
|
|
*
|
|
* Only certain platforms require software batch buffer command parsing, and
|
|
* only when enabled via module paramter.
|
|
*
|
|
* Return: true if the ring requires software command parsing
|
|
*/
|
|
bool i915_needs_cmd_parser(struct intel_engine_cs *ring)
|
|
{
|
|
struct drm_i915_private *dev_priv = ring->dev->dev_private;
|
|
|
|
if (!ring->needs_cmd_parser)
|
|
return false;
|
|
|
|
/*
|
|
* XXX: VLV is Gen7 and therefore has cmd_tables, but has PPGTT
|
|
* disabled. That will cause all of the parser's PPGTT checks to
|
|
* fail. For now, disable parsing when PPGTT is off.
|
|
*/
|
|
if (!dev_priv->mm.aliasing_ppgtt)
|
|
return false;
|
|
|
|
return (i915.enable_cmd_parser == 1);
|
|
}
|
|
|
|
static bool check_cmd(const struct intel_engine_cs *ring,
|
|
const struct drm_i915_cmd_descriptor *desc,
|
|
const u32 *cmd,
|
|
const bool is_master,
|
|
bool *oacontrol_set)
|
|
{
|
|
if (desc->flags & CMD_DESC_REJECT) {
|
|
DRM_DEBUG_DRIVER("CMD: Rejected command: 0x%08X\n", *cmd);
|
|
return false;
|
|
}
|
|
|
|
if ((desc->flags & CMD_DESC_MASTER) && !is_master) {
|
|
DRM_DEBUG_DRIVER("CMD: Rejected master-only command: 0x%08X\n",
|
|
*cmd);
|
|
return false;
|
|
}
|
|
|
|
if (desc->flags & CMD_DESC_REGISTER) {
|
|
u32 reg_addr = cmd[desc->reg.offset] & desc->reg.mask;
|
|
|
|
/*
|
|
* OACONTROL requires some special handling for writes. We
|
|
* want to make sure that any batch which enables OA also
|
|
* disables it before the end of the batch. The goal is to
|
|
* prevent one process from snooping on the perf data from
|
|
* another process. To do that, we need to check the value
|
|
* that will be written to the register. Hence, limit
|
|
* OACONTROL writes to only MI_LOAD_REGISTER_IMM commands.
|
|
*/
|
|
if (reg_addr == OACONTROL) {
|
|
if (desc->cmd.value == MI_LOAD_REGISTER_MEM)
|
|
return false;
|
|
|
|
if (desc->cmd.value == MI_LOAD_REGISTER_IMM(1))
|
|
*oacontrol_set = (cmd[2] != 0);
|
|
}
|
|
|
|
if (!valid_reg(ring->reg_table,
|
|
ring->reg_count, reg_addr)) {
|
|
if (!is_master ||
|
|
!valid_reg(ring->master_reg_table,
|
|
ring->master_reg_count,
|
|
reg_addr)) {
|
|
DRM_DEBUG_DRIVER("CMD: Rejected register 0x%08X in command: 0x%08X (ring=%d)\n",
|
|
reg_addr,
|
|
*cmd,
|
|
ring->id);
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (desc->flags & CMD_DESC_BITMASK) {
|
|
int i;
|
|
|
|
for (i = 0; i < MAX_CMD_DESC_BITMASKS; i++) {
|
|
u32 dword;
|
|
|
|
if (desc->bits[i].mask == 0)
|
|
break;
|
|
|
|
if (desc->bits[i].condition_mask != 0) {
|
|
u32 offset =
|
|
desc->bits[i].condition_offset;
|
|
u32 condition = cmd[offset] &
|
|
desc->bits[i].condition_mask;
|
|
|
|
if (condition == 0)
|
|
continue;
|
|
}
|
|
|
|
dword = cmd[desc->bits[i].offset] &
|
|
desc->bits[i].mask;
|
|
|
|
if (dword != desc->bits[i].expected) {
|
|
DRM_DEBUG_DRIVER("CMD: Rejected command 0x%08X for bitmask 0x%08X (exp=0x%08X act=0x%08X) (ring=%d)\n",
|
|
*cmd,
|
|
desc->bits[i].mask,
|
|
desc->bits[i].expected,
|
|
dword, ring->id);
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
#define LENGTH_BIAS 2
|
|
|
|
/**
|
|
* i915_parse_cmds() - parse a submitted batch buffer for privilege violations
|
|
* @ring: the ring on which the batch is to execute
|
|
* @batch_obj: the batch buffer in question
|
|
* @batch_start_offset: byte offset in the batch at which execution starts
|
|
* @is_master: is the submitting process the drm master?
|
|
*
|
|
* Parses the specified batch buffer looking for privilege violations as
|
|
* described in the overview.
|
|
*
|
|
* Return: non-zero if the parser finds violations or otherwise fails
|
|
*/
|
|
int i915_parse_cmds(struct intel_engine_cs *ring,
|
|
struct drm_i915_gem_object *batch_obj,
|
|
u32 batch_start_offset,
|
|
bool is_master)
|
|
{
|
|
int ret = 0;
|
|
u32 *cmd, *batch_base, *batch_end;
|
|
struct drm_i915_cmd_descriptor default_desc = { 0 };
|
|
int needs_clflush = 0;
|
|
bool oacontrol_set = false; /* OACONTROL tracking. See check_cmd() */
|
|
|
|
ret = i915_gem_obj_prepare_shmem_read(batch_obj, &needs_clflush);
|
|
if (ret) {
|
|
DRM_DEBUG_DRIVER("CMD: failed to prep read\n");
|
|
return ret;
|
|
}
|
|
|
|
batch_base = vmap_batch(batch_obj);
|
|
if (!batch_base) {
|
|
DRM_DEBUG_DRIVER("CMD: Failed to vmap batch\n");
|
|
i915_gem_object_unpin_pages(batch_obj);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (needs_clflush)
|
|
drm_clflush_virt_range((char *)batch_base, batch_obj->base.size);
|
|
|
|
cmd = batch_base + (batch_start_offset / sizeof(*cmd));
|
|
batch_end = cmd + (batch_obj->base.size / sizeof(*batch_end));
|
|
|
|
while (cmd < batch_end) {
|
|
const struct drm_i915_cmd_descriptor *desc;
|
|
u32 length;
|
|
|
|
if (*cmd == MI_BATCH_BUFFER_END)
|
|
break;
|
|
|
|
desc = find_cmd(ring, *cmd, &default_desc);
|
|
if (!desc) {
|
|
DRM_DEBUG_DRIVER("CMD: Unrecognized command: 0x%08X\n",
|
|
*cmd);
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (desc->flags & CMD_DESC_FIXED)
|
|
length = desc->length.fixed;
|
|
else
|
|
length = ((*cmd & desc->length.mask) + LENGTH_BIAS);
|
|
|
|
if ((batch_end - cmd) < length) {
|
|
DRM_DEBUG_DRIVER("CMD: Command length exceeds batch length: 0x%08X length=%u batchlen=%td\n",
|
|
*cmd,
|
|
length,
|
|
batch_end - cmd);
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (!check_cmd(ring, desc, cmd, is_master, &oacontrol_set)) {
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
cmd += length;
|
|
}
|
|
|
|
if (oacontrol_set) {
|
|
DRM_DEBUG_DRIVER("CMD: batch set OACONTROL but did not clear it\n");
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
if (cmd >= batch_end) {
|
|
DRM_DEBUG_DRIVER("CMD: Got to the end of the buffer w/o a BBE cmd!\n");
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
vunmap(batch_base);
|
|
|
|
i915_gem_object_unpin_pages(batch_obj);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* i915_cmd_parser_get_version() - get the cmd parser version number
|
|
*
|
|
* The cmd parser maintains a simple increasing integer version number suitable
|
|
* for passing to userspace clients to determine what operations are permitted.
|
|
*
|
|
* Return: the current version number of the cmd parser
|
|
*/
|
|
int i915_cmd_parser_get_version(void)
|
|
{
|
|
/*
|
|
* Command parser version history
|
|
*
|
|
* 1. Initial version. Checks batches and reports violations, but leaves
|
|
* hardware parsing enabled (so does not allow new use cases).
|
|
*/
|
|
return 1;
|
|
}
|