[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 06:28:32 PST 2015
On 25/11/15 15:21, Francisco Jerez wrote:
> Samuel Iglesias Gonsálvez <siglesias at igalia.com> writes:
>
>> On 25/11/15 14:45, Francisco Jerez wrote:
>>> Samuel Iglesias Gonsálvez <siglesias at igalia.com> writes:
>>>
>>>> On 25/11/15 13:56, Samuel Iglesias Gonsálvez wrote:
>>>>>
>>>>>
>>>>> 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 }},
>>>>
>>>> I don't find this in IVB/HSW PRM docs...
>>>>
>>>>>>> + {{ 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 }},
>>>>
>>>> ...nor this one. Where are they defined?
>>>>
>>> Not sure if those are part of the PRMs, according to the internal
>>> hardware docs (BSpec » 3D-Media-GPGPU Engine » L3 Cache and URB [IVB+] »
>>> L3 Cache and URB [IVB,EXCLUDE(VLV)] » L3 Cache Allocation and
>>> Programming [IVB]) those two were "validated as a later supported
>>> configuration and can be utilized if desired".
>>>
>>
>> I finally found them in public PRM too. Thanks for the citation.
>>
>> Please, add my R-b:
>>
>> Reviewed-by: Samuel Iglesias Gonsálvez <siglesias at igalia.com>
>>
> Sorry, but I just made a two-line change to this patch and re-sent, does
> your review still stand?
>
Yes, I am fine with the changes. Please keep it.
Thanks,
Sam
>> Sam
>>
>>>> Sam
>>>>
>>>>>>> + {{ 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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