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Merge pull request #761 from acomodi/interchange-constrs

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interchange: add user placement constraints handling
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gatecat 2021-07-12 20:04:48 +01:00 committed by GitHub
commit 034467ff61
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5 changed files with 174 additions and 13 deletions
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1
common/placer_heap.cc
View File

@ -401,6 +401,7 @@ class HeAPPlacer
// Initial constraints placer
for (auto &cell_entry : ctx->cells) {
CellInfo *cell = cell_entry.second.get();
auto loc = cell->attrs.find(ctx->id("BEL"));
if (loc != cell->attrs.end()) {
std::string loc_name = loc->second.as_string();

1
fpga_interchange/arch.cc
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@ -787,6 +787,7 @@ bool Arch::place()
getCtx()->check();
#endif
place_constraints();
place_globals();
std::string placer = str_or_default(settings, id("placer"), defaultPlacer);

3
fpga_interchange/arch.h
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@ -720,6 +720,9 @@ struct Arch : ArchAPI<ArchRanges>
void prepare_cluster(const ClusterPOD *cluster, uint32_t index);
dict<ClusterId, Cluster> clusters;
// User constraints
void place_constraints();
void decode_lut_cells();
const GlobalCellPOD *global_cell_info(IdString cell_type) const;

106
fpga_interchange/arch_place_constr.cc Normal file
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@ -0,0 +1,106 @@
/*
* nextpnr -- Next Generation Place and Route
*
* Copyright (C) 2021 Symbiflow Authors
*
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include "log.h"
#include "nextpnr.h"
#include "util.h"
NEXTPNR_NAMESPACE_BEGIN
void Arch::place_constraints()
{
std::vector<std::pair<IdString, BelId>> constrained_cells;
for (auto &cell_pair : cells) {
CellInfo *cell = cell_pair.second.get();
auto loc_constr = cell->attrs.find(id("LOC"));
auto bel_constr = cell->attrs.find(id("BEL"));
if (loc_constr == cell->attrs.end() || bel_constr == cell->attrs.end())
continue;
IdString loc_name = id(loc_constr->second.as_string());
IdString bel_name = id(bel_constr->second.as_string());
BelId bel;
for (size_t i = 0; i < chip_info->tiles.size(); ++i) {
const auto &tile = chip_info->tiles[i];
bool site_found = false;
for (size_t j = 0; j < tile.sites.size(); ++j) {
auto &site_data = chip_info->sites[tile.sites[j]];
if (loc_name == id(site_data.site_name.get())) {
site_found = true;
break;
}
}
if (!site_found)
continue;
const auto &tile_type = chip_info->tile_types[tile.type];
bool bel_found = false;
for (size_t j = 0; j < tile_type.bel_data.size(); ++j) {
const BelInfoPOD &bel_data = tile_type.bel_data[j];
if (bel_name == IdString(bel_data.name)) {
bel.tile = i;
bel.index = j;
bel_found = true;
break;
}
}
if (bel_found)
break;
else
log_error("No bel found for user constraint \'%s/%s\' for cell \'%s\'\n", loc_name.c_str(getCtx()),
bel_name.c_str(getCtx()), cell->name.c_str(getCtx()));
}
if (!isValidBelForCellType(cell->type, bel))
log_error("Bel \'%s\' is invalid for cell \'%s\' (%s)\n", nameOfBel(bel), cell->name.c_str(getCtx()),
cell->type.c_str(getCtx()));
auto bound_cell = getBoundBelCell(bel);
if (bound_cell)
log_error("Cell \'%s\' cannot be bound to bel \'%s\' "
"since it is already bound to cell \'%s\'\n",
cell->name.c_str(getCtx()), nameOfBel(bel), bound_cell->name.c_str(getCtx()));
bindBel(bel, cell, STRENGTH_USER);
cell->attrs.erase(id("BEL"));
constrained_cells.emplace_back(cell->name, bel);
}
if (constrained_cells.empty())
return;
log_info("Cell placed via user constraints:\n");
for (auto cell_bel : constrained_cells) {
IdString cell_name = cell_bel.first;
BelId bel = cell_bel.second;
if (!isBelLocationValid(bel))
log_error(" - Bel \'%s\' is not valid for cell \'%s\'\n", nameOfBel(bel), cell_name.c_str(getCtx()));
log_info(" - %s placed at %s\n", cell_name.c_str(getCtx()), nameOfBel(cell_bel.second));
}
}
NEXTPNR_NAMESPACE_END

68
fpga_interchange/xdc.cc
View File

@ -31,7 +31,7 @@
NEXTPNR_NAMESPACE_BEGIN
static int port_set_from_any(Tcl_Interp *interp, Tcl_Obj *objPtr) { return TCL_ERROR; }
static int obj_set_from_any(Tcl_Interp *interp, Tcl_Obj *objPtr) { return TCL_ERROR; }
static void set_tcl_obj_string(Tcl_Obj *objPtr, const std::string &s)
{
@ -55,12 +55,21 @@ static void port_update_string(Tcl_Obj *objPtr)
set_tcl_obj_string(objPtr, port_name);
}
static void port_dup(Tcl_Obj *srcPtr, Tcl_Obj *dupPtr)
static void cell_update_string(Tcl_Obj *objPtr)
{
const Context *ctx = static_cast<const Context *>(objPtr->internalRep.twoPtrValue.ptr1);
CellInfo *cell_info = static_cast<CellInfo *>(objPtr->internalRep.twoPtrValue.ptr2);
std::string cell_name = cell_info->name.str(ctx);
set_tcl_obj_string(objPtr, cell_name);
}
static void obj_dup(Tcl_Obj *srcPtr, Tcl_Obj *dupPtr)
{
dupPtr->internalRep.twoPtrValue = srcPtr->internalRep.twoPtrValue;
}
static void port_free(Tcl_Obj *objPtr) {}
static void obj_free(Tcl_Obj *objPtr) {}
static void Tcl_SetStringResult(Tcl_Interp *interp, const std::string &s)
{
@ -71,7 +80,11 @@ static void Tcl_SetStringResult(Tcl_Interp *interp, const std::string &s)
}
static Tcl_ObjType port_object = {
"port", port_free, port_dup, port_update_string, port_set_from_any,
"port", obj_free, obj_dup, port_update_string, obj_set_from_any,
};
static Tcl_ObjType cell_object = {
"cell", obj_free, obj_dup, cell_update_string, obj_set_from_any,
};
static int get_ports(ClientData data, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])
@ -106,6 +119,38 @@ static int get_ports(ClientData data, Tcl_Interp *interp, int objc, Tcl_Obj *CON
}
}
static int get_cells(ClientData data, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])
{
const Context *ctx = static_cast<const Context *>(data);
if (objc == 1) {
// Return list of all ports.
Tcl_SetStringResult(interp, "Unimplemented");
return TCL_ERROR;
} else if (objc == 2) {
const char *arg0 = Tcl_GetString(objv[1]);
IdString cell_name = ctx->id(arg0);
auto iter = ctx->cells.find(cell_name);
if (iter == ctx->cells.end()) {
Tcl_SetStringResult(interp, "Could not find cell " + cell_name.str(ctx));
return TCL_ERROR;
}
Tcl_Obj *result = Tcl_NewObj();
result->typePtr = &cell_object;
result->internalRep.twoPtrValue.ptr1 = (void *)(ctx);
result->internalRep.twoPtrValue.ptr2 = (void *)(iter->second.get());
result->bytes = nullptr;
cell_update_string(result);
Tcl_SetObjResult(interp, result);
return TCL_OK;
} else {
return TCL_ERROR;
}
}
static int set_property(ClientData data, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])
{
// set_property <property> <value> <object>
@ -118,17 +163,21 @@ static int set_property(ClientData data, Tcl_Interp *interp, int objc, Tcl_Obj *
const char *value = Tcl_GetString(objv[2]);
const Tcl_Obj *object = objv[3];
if (object->typePtr != &port_object) {
Tcl_SetStringResult(interp, "Only port objects are handled right now!");
return TCL_ERROR;
}
if (object->typePtr == &port_object) {
const Context *ctx = static_cast<const Context *>(object->internalRep.twoPtrValue.ptr1);
PortInfo *port_info = static_cast<PortInfo *>(object->internalRep.twoPtrValue.ptr2);
NPNR_ASSERT(port_info->net != nullptr);
CellInfo *cell = ctx->port_cells.at(port_info->name);
cell->attrs[ctx->id(property)] = Property(value);
} else if (object->typePtr == &cell_object) {
const Context *ctx = static_cast<const Context *>(object->internalRep.twoPtrValue.ptr1);
CellInfo *cell = static_cast<CellInfo *>(object->internalRep.twoPtrValue.ptr2);
cell->attrs[ctx->id(property)] = Property(value);
} else {
return TCL_ERROR;
}
return TCL_OK;
}
@ -150,6 +199,7 @@ TclInterp::TclInterp(Context *ctx)
" }\n"
"}") == TCL_OK);
Tcl_CreateObjCommand(interp, "get_ports", get_ports, ctx, nullptr);
Tcl_CreateObjCommand(interp, "get_cells", get_cells, ctx, nullptr);
Tcl_CreateObjCommand(interp, "set_property", set_property, ctx, nullptr);
}