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/*
* 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 "anv_private.h"
#include "common/gen_l3_config.h"
#include "genxml/gen_macros.h"
#include "genxml/genX_pack.h"
#define emit_lri(batch, reg, imm) \
anv_batch_emit(batch, GENX(MI_LOAD_REGISTER_IMM), lri) { \
lri.RegisterOffset = __anv_reg_num(reg); \
lri.DataDWord = imm; \
}
#define IVB_L3SQCREG1_SQGHPCI_DEFAULT 0x00730000
#define VLV_L3SQCREG1_SQGHPCI_DEFAULT 0x00d30000
#define HSW_L3SQCREG1_SQGHPCI_DEFAULT 0x00610000
/**
* Program the hardware to use the specified L3 configuration.
*/
static void
setup_l3_config(struct anv_cmd_buffer *cmd_buffer/*, struct brw_context *brw*/,
const struct gen_l3_config *cfg)
{
const bool has_slm = cfg->n[GEN_L3P_SLM];
/* According to the hardware docs, the L3 partitioning can only be changed
* while the pipeline is completely drained and the caches are flushed,
* which involves a first PIPE_CONTROL flush which stalls the pipeline...
*/
anv_batch_emit(&cmd_buffer->batch, GENX(PIPE_CONTROL), pc) {
pc.DCFlushEnable = true;
pc.PostSyncOperation = NoWrite;
pc.CommandStreamerStallEnable = true;
}
/* ...followed by a second pipelined PIPE_CONTROL that initiates
* invalidation of the relevant caches. Note that because RO invalidation
* happens at the top of the pipeline (i.e. right away as the PIPE_CONTROL
* command is processed by the CS) we cannot combine it with the previous
* stalling flush as the hardware documentation suggests, because that
* would cause the CS to stall on previous rendering *after* RO
* invalidation and wouldn't prevent the RO caches from being polluted by
* concurrent rendering before the stall completes. This intentionally
* doesn't implement the SKL+ hardware workaround suggesting to enable CS
* stall on PIPE_CONTROLs with the texture cache invalidation bit set for
* GPGPU workloads because the previous and subsequent PIPE_CONTROLs
* already guarantee that there is no concurrent GPGPU kernel execution
* (see SKL HSD 2132585).
*/
anv_batch_emit(&cmd_buffer->batch, GENX(PIPE_CONTROL), pc) {
pc.TextureCacheInvalidationEnable = true;
pc.ConstantCacheInvalidationEnable = true;
pc.InstructionCacheInvalidateEnable = true;
pc.StateCacheInvalidationEnable = true;
pc.PostSyncOperation = NoWrite;
}
/* Now send a third stalling flush to make sure that invalidation is
* complete when the L3 configuration registers are modified.
*/
anv_batch_emit(&cmd_buffer->batch, GENX(PIPE_CONTROL), pc) {
pc.DCFlushEnable = true;
pc.PostSyncOperation = NoWrite;
pc.CommandStreamerStallEnable = true;
}
#if GEN_GEN >= 8
assert(!cfg->n[GEN_L3P_IS] && !cfg->n[GEN_L3P_C] && !cfg->n[GEN_L3P_T]);
uint32_t l3cr;
anv_pack_struct(&l3cr, GENX(L3CNTLREG),
.SLMEnable = has_slm,
.URBAllocation = cfg->n[GEN_L3P_URB],
.ROAllocation = cfg->n[GEN_L3P_RO],
.DCAllocation = cfg->n[GEN_L3P_DC],
.AllAllocation = cfg->n[GEN_L3P_ALL]);
/* Set up the L3 partitioning. */
emit_lri(&cmd_buffer->batch, GENX(L3CNTLREG), l3cr);
#else
const bool has_dc = cfg->n[GEN_L3P_DC] || cfg->n[GEN_L3P_ALL];
const bool has_is = cfg->n[GEN_L3P_IS] || cfg->n[GEN_L3P_RO] ||
cfg->n[GEN_L3P_ALL];
const bool has_c = cfg->n[GEN_L3P_C] || cfg->n[GEN_L3P_RO] ||
cfg->n[GEN_L3P_ALL];
const bool has_t = cfg->n[GEN_L3P_T] || cfg->n[GEN_L3P_RO] ||
cfg->n[GEN_L3P_ALL];
assert(!cfg->n[GEN_L3P_ALL]);
/* When enabled SLM only uses a portion of the L3 on half of the banks,
* the matching space on the remaining banks has to be allocated to a
* client (URB for all validated configurations) set to the
* lower-bandwidth 2-bank address hashing mode.
*/
const struct gen_device_info *devinfo = &cmd_buffer->device->info;
const bool urb_low_bw = has_slm && !devinfo->is_baytrail;
assert(!urb_low_bw || cfg->n[GEN_L3P_URB] == cfg->n[GEN_L3P_SLM]);
/* Minimum number of ways that can be allocated to the URB. */
const unsigned n0_urb = (devinfo->is_baytrail ? 32 : 0);
assert(cfg->n[GEN_L3P_URB] >= n0_urb);
uint32_t l3sqcr1, l3cr2, l3cr3;
anv_pack_struct(&l3sqcr1, GENX(L3SQCREG1),
.ConvertDC_UC = !has_dc,
.ConvertIS_UC = !has_is,
.ConvertC_UC = !has_c,
.ConvertT_UC = !has_t);
l3sqcr1 |=
GEN_IS_HASWELL ? HSW_L3SQCREG1_SQGHPCI_DEFAULT :
devinfo->is_baytrail ? VLV_L3SQCREG1_SQGHPCI_DEFAULT :
IVB_L3SQCREG1_SQGHPCI_DEFAULT;
anv_pack_struct(&l3cr2, GENX(L3CNTLREG2),
.SLMEnable = has_slm,
.URBLowBandwidth = urb_low_bw,
.URBAllocation = cfg->n[GEN_L3P_URB],
#if !GEN_IS_HASWELL
.ALLAllocation = cfg->n[GEN_L3P_ALL],
#endif
.ROAllocation = cfg->n[GEN_L3P_RO],
.DCAllocation = cfg->n[GEN_L3P_DC]);
anv_pack_struct(&l3cr3, GENX(L3CNTLREG3),
.ISAllocation = cfg->n[GEN_L3P_IS],
.ISLowBandwidth = 0,
.CAllocation = cfg->n[GEN_L3P_C],
.CLowBandwidth = 0,
.TAllocation = cfg->n[GEN_L3P_T],
.TLowBandwidth = 0);
/* Set up the L3 partitioning. */
emit_lri(&cmd_buffer->batch, GENX(L3SQCREG1), l3sqcr1);
emit_lri(&cmd_buffer->batch, GENX(L3CNTLREG2), l3cr2);
emit_lri(&cmd_buffer->batch, GENX(L3CNTLREG3), l3cr3);
#if GEN_IS_HASWELL
if (cmd_buffer->device->instance->physicalDevice.cmd_parser_version >= 4) {
/* Enable L3 atomics on HSW if we have a DC partition, otherwise keep
* them disabled to avoid crashing the system hard.
*/
uint32_t scratch1, chicken3;
anv_pack_struct(&scratch1, GENX(SCRATCH1),
.L3AtomicDisable = !has_dc);
anv_pack_struct(&chicken3, GENX(CHICKEN3),
.L3AtomicDisable = !has_dc);
emit_lri(&cmd_buffer->batch, GENX(SCRATCH1), scratch1);
emit_lri(&cmd_buffer->batch, GENX(CHICKEN3), chicken3);
}
#endif
#endif
}
void
genX(cmd_buffer_config_l3)(struct anv_cmd_buffer *cmd_buffer,
const struct anv_pipeline *pipeline)
{
struct anv_cmd_state *state = &cmd_buffer->state;
const struct gen_l3_config *const cfg = pipeline->urb.l3_config;
assert(cfg);
if (cfg != state->current_l3_config) {
setup_l3_config(cmd_buffer, cfg);
state->current_l3_config = cfg;
if (unlikely(INTEL_DEBUG & DEBUG_L3)) {
fprintf(stderr, "L3 config transition: ");
gen_dump_l3_config(cfg, stderr);
}
}
}
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