[Mesa-dev] [PATCH v2 06/42] i965: Import tables enumerating the set of validated L3 configurations.
Samuel Iglesias Gonsálvez
siglesias at igalia.com
Wed Nov 25 04:56:58 PST 2015
On 25/11/15 13:20, Samuel Iglesias Gonsálvez wrote:
>
>
> On 18/11/15 06:54, Jordan Justen wrote:
>> From: Francisco Jerez <currojerez at riseup.net>
>>
>> It should be possible to use additional L3 configurations other than
>> the ones listed in the tables of validated allocations ("BSpec »
>> 3D-Media-GPGPU Engine » L3 Cache and URB [IVB+] » L3 Cache and URB [*]
>> » L3 Allocation and Programming"), but it seems sensible for now to
>> hard-code the tables in order to stick to the hardware docs. Instead
>> of setting up the arbitrary L3 partitioning given as input, the
>> closest validated L3 configuration will be looked up in these tables
>> and used to program the hardware.
>>
>> The included tables should work for Gen7-9. Note that the quantities
>> are specified in ways rather than in KB, this is because the L3
>> control registers expect the value in ways, and because by doing that
>> we can re-use a single table for all GT variants of the same
>> generation (and in the case of IVB/HSW and CHV/SKL across different
>> generations) which generally have different L3 way sizes but allow the
>> same combinations of way allocations.
>> ---
>> src/mesa/drivers/dri/i965/Makefile.sources | 1 +
>> src/mesa/drivers/dri/i965/gen7_l3_state.c | 163 +++++++++++++++++++++++++++++
>> 2 files changed, 164 insertions(+)
>> create mode 100644 src/mesa/drivers/dri/i965/gen7_l3_state.c
>>
>> diff --git a/src/mesa/drivers/dri/i965/Makefile.sources b/src/mesa/drivers/dri/i965/Makefile.sources
>> index 5a88d66..91901ad 100644
>> --- a/src/mesa/drivers/dri/i965/Makefile.sources
>> +++ b/src/mesa/drivers/dri/i965/Makefile.sources
>> @@ -184,6 +184,7 @@ i965_FILES = \
>> gen7_cs_state.c \
>> gen7_disable.c \
>> gen7_gs_state.c \
>> + gen7_l3_state.c \
>> gen7_misc_state.c \
>> gen7_sf_state.c \
>> gen7_sol_state.c \
>> diff --git a/src/mesa/drivers/dri/i965/gen7_l3_state.c b/src/mesa/drivers/dri/i965/gen7_l3_state.c
>> new file mode 100644
>> index 0000000..8f9ba5b
>> --- /dev/null
>> +++ b/src/mesa/drivers/dri/i965/gen7_l3_state.c
>> @@ -0,0 +1,163 @@
>> +/*
>> + * Copyright (c) 2015 Intel Corporation
>> + *
>> + * 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 (including the next
>> + * paragraph) 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 "brw_context.h"
>> +#include "brw_defines.h"
>> +#include "brw_state.h"
>> +#include "intel_batchbuffer.h"
>> +
>> +/**
>> + * Chunk of L3 cache reserved for some specific purpose.
>> + */
>> +enum brw_l3_partition {
>> + /** Shared local memory. */
>> + L3P_SLM = 0,
>> + /** Unified return buffer. */
>> + L3P_URB,
>> + /** Union of DC and RO. */
>> + L3P_ALL,
>> + /** Data cluster RW partition. */
>> + L3P_DC,
>> + /** Union of IS, C and T. */
>> + L3P_RO,
>> + /** Instruction and state cache. */
>> + L3P_IS,
>> + /** Constant cache. */
>> + L3P_C,
>> + /** Texture cache. */
>> + L3P_T,
>> + /** Number of supported L3 partitions. */
>> + NUM_L3P
>> +};
>> +
>> +/**
>> + * L3 configuration represented as the number of ways allocated for each
>> + * partition. \sa get_l3_way_size().
>> + */
>> +struct brw_l3_config {
>> + unsigned n[NUM_L3P];
>> +};
>> +
>> +/**
>> + * IVB/HSW validated L3 configurations.
>> + */
>> +static const struct brw_l3_config ivb_l3_configs[] = {
>> + {{ 0, 32, 0, 0, 32, 0, 0, 0 }},
>> + {{ 0, 32, 0, 16, 16, 0, 0, 0 }},
>> + {{ 0, 32, 0, 4, 0, 8, 4, 16 }},
>> + {{ 0, 28, 0, 8, 0, 8, 4, 16 }},
>> + {{ 0, 28, 0, 16, 0, 8, 4, 8 }},
>> + {{ 0, 28, 0, 8, 0, 16, 4, 8 }},
>> + {{ 0, 28, 0, 0, 0, 16, 4, 16 }},
>> + {{ 0, 32, 0, 0, 0, 16, 0, 16 }},
>> + {{ 0, 28, 0, 4, 32, 0, 0, 0 }},
>> + {{ 16, 16, 0, 16, 16, 0, 0, 0 }},
>> + {{ 16, 16, 0, 8, 0, 8, 8, 8 }},
>> + {{ 16, 16, 0, 4, 0, 8, 4, 16 }},
>> + {{ 16, 16, 0, 4, 0, 16, 4, 8 }},
>> + {{ 16, 16, 0, 0, 32, 0, 0, 0 }},
>> + {{ 0 }}
>> +};
>> +
>
> This definition is wrong. It defines 15 elements when NUM_L3P value is 9.
>
Sorry, I read it wrongly. It is fine.
Sam
>> +/**
>> + * VLV validated L3 configurations.
>> + */
>> +static const struct brw_l3_config vlv_l3_configs[] = {
>> + {{ 0, 80, 0, 0, 16, 0, 0, 0 }},
>> + {{ 0, 80, 0, 8, 8, 0, 0, 0 }},
>> + {{ 0, 64, 0, 16, 16, 0, 0, 0 }},
>> + {{ 0, 64, 0, 0, 32, 0, 0, 0 }},
>> + {{ 0, 60, 0, 4, 32, 0, 0, 0 }},
>> + {{ 32, 32, 0, 16, 16, 0, 0, 0 }},
>> + {{ 32, 40, 0, 8, 16, 0, 0, 0 }},
>> + {{ 32, 40, 0, 16, 8, 0, 0, 0 }},
>> + {{ 0 }}
>> +};
>> +
>> +/**
>> + * BDW validated L3 configurations.
>> + */
>> +static const struct brw_l3_config bdw_l3_configs[] = {
>> + {{ 0, 48, 48, 0, 0, 0, 0, 0 }},
>> + {{ 0, 48, 0, 16, 32, 0, 0, 0 }},
>> + {{ 0, 32, 0, 16, 48, 0, 0, 0 }},
>> + {{ 0, 32, 0, 0, 64, 0, 0, 0 }},
>> + {{ 0, 32, 64, 0, 0, 0, 0, 0 }},
>> + {{ 24, 16, 48, 0, 0, 0, 0, 0 }},
>> + {{ 24, 16, 0, 16, 32, 0, 0, 0 }},
>> + {{ 24, 16, 0, 32, 16, 0, 0, 0 }},
>> + {{ 0 }}
>> +};
>> +
>> +/**
>> + * CHV/SKL validated L3 configurations.
>> + */
>> +static const struct brw_l3_config chv_l3_configs[] = {
>> + {{ 0, 48, 48, 0, 0, 0, 0, 0 }},
>> + {{ 0, 48, 0, 16, 32, 0, 0, 0 }},
>> + {{ 0, 32, 0, 16, 48, 0, 0, 0 }},
>> + {{ 0, 32, 0, 0, 64, 0, 0, 0 }},
>> + {{ 0, 32, 64, 0, 0, 0, 0, 0 }},
>> + {{ 32, 16, 48, 0, 0, 0, 0, 0 }},
>> + {{ 32, 16, 0, 16, 32, 0, 0, 0 }},
>> + {{ 32, 16, 0, 32, 16, 0, 0, 0 }},
>> + {{ 0 }}
>> +};
>> +
>> +/**
>> + * Return a zero-terminated array of validated L3 configurations for the
>> + * specified device.
>> + */
>> +static const struct brw_l3_config *
>> +get_l3_configs(const struct brw_device_info *devinfo)
>> +{
>> + switch (devinfo->gen) {
>> + case 7:
>> + return (devinfo->is_baytrail ? vlv_l3_configs : ivb_l3_configs);
>> +
>> + case 8:
>> + return (devinfo->is_cherryview ? chv_l3_configs : bdw_l3_configs);
>> +
>> + case 9:
>> + return chv_l3_configs;
>> +
>> + default:
>> + unreachable("Not implemented");
>> + }
>> +}
>> +
>> +/**
>> + * Return the size of an L3 way in KB.
>> + */
>> +static unsigned
>> +get_l3_way_size(const struct brw_device_info *devinfo)
>> +{
>> + if (devinfo->is_baytrail)
>> + return 2;
>> +
>> + else if (devinfo->is_cherryview)
>> + return 4;
>> +
>> + else
>> + return 2 << devinfo->gt;
>> +}
>>
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