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/*
*
* (C) COPYRIGHT 2010 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
*
* A copy of the licence is included with the program, and can also be obtained from Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
/**
* @file mali_kbase_js_affinity.c
* Base kernel affinity manager APIs
*/
#include <kbase/src/common/mali_kbase.h>
#include "mali_kbase_js_affinity.h"
#if MALI_DEBUG && 0 /* disabled to avoid compilation warnings */
STATIC void debug_get_binary_string(const u64 n, char *buff, const int size)
{
unsigned int i;
for (i = 0; i < size; i++)
{
buff[i] = ((n >> i) & 1) ? '*' : '-';
}
buff[size] = '\0';
}
#define N_CORES 8
STATIC void debug_print_affinity_info(const kbase_device *kbdev, const kbase_jd_atom *katom, int js, u64 affinity)
{
char buff[N_CORES +1];
char buff2[N_CORES +1];
base_jd_core_req core_req = katom->atom->core_req;
u8 nr_nss_ctxs_running = kbdev->js_data.runpool_irq.nr_nss_ctxs_running;
u64 shader_present_bitmap = kbdev->shader_present_bitmap;
debug_get_binary_string(shader_present_bitmap, buff, N_CORES);
debug_get_binary_string(affinity, buff2, N_CORES);
OSK_PRINT_INFO(OSK_BASE_JM, "Job: NSS COH FS CS T CF V JS | NSS_ctx | GPU:12345678 | AFF:12345678");
OSK_PRINT_INFO(OSK_BASE_JM, " %s %s %s %s %s %s %s %u | %u | %s | %s",
core_req & BASE_JD_REQ_NSS ? "*" : "-",
core_req & BASE_JD_REQ_COHERENT_GROUP ? "*" : "-",
core_req & BASE_JD_REQ_FS ? "*" : "-",
core_req & BASE_JD_REQ_CS ? "*" : "-",
core_req & BASE_JD_REQ_T ? "*" : "-",
core_req & BASE_JD_REQ_CF ? "*" : "-",
core_req & BASE_JD_REQ_V ? "*" : "-",
js, nr_nss_ctxs_running, buff, buff2);
}
#endif /* MALI_DEBUG */
/*
* As long as it has been decided to have a deeper modification of
* what job scheduler, power manager and affinity manager will
* implement, this function is just an intermediate step that
* assumes:
* - all working cores will be powered on when this is called.
* - largest current configuration is a T658 (2x4 cores).
* - It has been decided not to have hardcoded values so the cores
* for SS and NSS jobs will be evently distributed.
* - Odd combinations of core requirements have been filtered out
* and do not get to this function (e.g. CS+T+NSS is not
* supported here).
* - This function is frequently called and can be optimized,
* (see notes in loops), but as the functionallity will soon
* be modified, optimization has not been addressed.
*/
void kbase_js_choose_affinity(u64 *affinity, kbase_device *kbdev, kbase_jd_atom *katom, int js)
{
base_jd_core_req core_req = katom->core_req;
kbasep_js_device_data *device_data = &kbdev->js_data;
u64 shader_present_bitmap = kbdev->shader_present_bitmap;
CSTD_UNUSED(js);
OSK_ASSERT(0 != shader_present_bitmap);
if (1 == kbdev->gpu_props.num_cores)
{
/* trivial case only one core, nothing to do */
*affinity = shader_present_bitmap;
}
else if (0 == device_data->runpool_irq.nr_nss_ctxs_running)
{
/* SS state - all jobs are soft stopable */
if (core_req & (BASE_JD_REQ_COHERENT_GROUP))
{
*affinity = kbdev->gpu_props.props.coherency_info.group[0].core_mask;
}
else
{
*affinity = shader_present_bitmap;
}
}
else
{
/* NSS state - divide cores in two non-overlapping groups
for SS and NSS jobs */
u64 ss_bitmap, nss_bitmap;
int n_nss_cores = kbdev->gpu_props.num_cores >> 1;
OSK_ASSERT(0 != n_nss_cores);
/* compute the nss reserved cores bitmap */
nss_bitmap = ~0;
/* note: this can take a while, optimization desirable */
while (n_nss_cores != osk_count_set_bits(nss_bitmap & shader_present_bitmap))
{
nss_bitmap = nss_bitmap << 1;
}
nss_bitmap &= shader_present_bitmap;
/* now decide 4 different situations depending on the job being
SS or NSS and requiring coherent group or not */
if (core_req & BASE_JD_REQ_NSS)
{
unsigned int num_core_groups = kbdev->gpu_props.num_core_groups;
OSK_ASSERT(0 != num_core_groups);
if ((core_req & BASE_JD_REQ_COHERENT_GROUP) && (1 != num_core_groups))
{
/* NSS job requiring coherency and coherency matters
because we got more than one core group */
u64 group1_mask = kbdev->gpu_props.props.coherency_info.group[1].core_mask;
*affinity = nss_bitmap & group1_mask;
}
else
{
/* NSS job not requiring coherency or coherency is
assured as we only have one core_group */
*affinity = nss_bitmap;
}
}
else
{
ss_bitmap = shader_present_bitmap ^ nss_bitmap;
if (core_req & BASE_JD_REQ_COHERENT_GROUP)
{
/* SS job in NSS state and req coherent group */
u64 group0_mask = kbdev->gpu_props.props.coherency_info.group[0].core_mask;
u64 ss_coh_bitmap = ss_bitmap & group0_mask;
*affinity = ss_coh_bitmap;
}
else
{
/* SS job in NSS state and does not req coherent group */
*affinity = ss_bitmap;
}
}
}
OSK_ASSERT(*affinity != 0);
}
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