diff options
Diffstat (limited to 'src/gallium/drivers/cell/ppu/cell_spu.c')
| -rw-r--r-- | src/gallium/drivers/cell/ppu/cell_spu.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/src/gallium/drivers/cell/ppu/cell_spu.c b/src/gallium/drivers/cell/ppu/cell_spu.c new file mode 100644 index 00000000000..28e5e6d706d --- /dev/null +++ b/src/gallium/drivers/cell/ppu/cell_spu.c @@ -0,0 +1,219 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * 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, sub license, 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 NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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. + * + **************************************************************************/ + + +/** + * Utility/wrappers for communicating with the SPUs. + */ + + +#include <pthread.h> + +#include "cell_spu.h" +#include "pipe/p_format.h" +#include "pipe/p_state.h" +#include "util/u_memory.h" +#include "cell/common.h" + + +/* +helpful headers: +/opt/ibm/cell-sdk/prototype/src/include/ppu/cbe_mfc.h +*/ + + +/** + * Cell/SPU info that's not per-context. + */ +struct cell_global_info cell_global; + + +/** + * Scan /proc/cpuinfo to determine the timebase for the system. + * This is used by the SPUs to convert 'decrementer' ticks to seconds. + * There may be a better way to get this value... + */ +static unsigned +get_timebase(void) +{ + FILE *f = fopen("/proc/cpuinfo", "r"); + unsigned timebase; + + assert(f); + while (!feof(f)) { + char line[80]; + fgets(line, sizeof(line), f); + if (strncmp(line, "timebase", 8) == 0) { + char *colon = strchr(line, ':'); + if (colon) { + timebase = atoi(colon + 2); + break; + } + } + } + fclose(f); + + return timebase; +} + + +/** + * Write a 1-word message to the given SPE mailbox. + */ +void +send_mbox_message(spe_context_ptr_t ctx, unsigned int msg) +{ + spe_in_mbox_write(ctx, &msg, 1, SPE_MBOX_ALL_BLOCKING); +} + + +/** + * Wait for a 1-word message to arrive in given mailbox. + */ +uint +wait_mbox_message(spe_context_ptr_t ctx) +{ + do { + unsigned data; + int count = spe_out_mbox_read(ctx, &data, 1); + + if (count == 1) { + return data; + } + + if (count < 0) { + /* error */ ; + } + } while (1); +} + + +/** + * Called by pthread_create() to spawn an SPU thread. + */ +static void * +cell_thread_function(void *arg) +{ + struct cell_init_info *init = (struct cell_init_info *) arg; + unsigned entry = SPE_DEFAULT_ENTRY; + + ASSERT_ALIGN16(init); + + if (spe_context_run(cell_global.spe_contexts[init->id], &entry, 0, + init, NULL, NULL) < 0) { + fprintf(stderr, "spe_context_run() failed\n"); + exit(1); + } + + pthread_exit(NULL); +} + + +/** + * Create the SPU threads. This is done once during driver initialization. + * This involves setting the the "init" message which is sent to each SPU. + * The init message specifies an SPU id, total number of SPUs, location + * and number of batch buffers, etc. + */ +void +cell_start_spus(struct cell_context *cell) +{ + static boolean one_time_init = FALSE; + uint i, j; + uint timebase = get_timebase(); + + if (one_time_init) { + fprintf(stderr, "PPU: Multiple rendering contexts not yet supported " + "on Cell.\n"); + abort(); + } + + one_time_init = TRUE; + + assert(cell->num_spus <= CELL_MAX_SPUS); + + ASSERT_ALIGN16(&cell_global.inits[0]); + ASSERT_ALIGN16(&cell_global.inits[1]); + + /* + * Initialize the global 'inits' structure for each SPU. + * A pointer to the init struct will be passed to each SPU. + * The SPUs will then each grab their init info with mfc_get(). + */ + for (i = 0; i < cell->num_spus; i++) { + cell_global.inits[i].id = i; + cell_global.inits[i].num_spus = cell->num_spus; + cell_global.inits[i].debug_flags = cell->debug_flags; + cell_global.inits[i].inv_timebase = 1000.0f / timebase; + + for (j = 0; j < CELL_NUM_BUFFERS; j++) { + cell_global.inits[i].buffers[j] = cell->buffer[j]; + } + cell_global.inits[i].buffer_status = &cell->buffer_status[0][0][0]; + + cell_global.inits[i].spu_functions = &cell->spu_functions; + + cell_global.spe_contexts[i] = spe_context_create(0, NULL); + if (!cell_global.spe_contexts[i]) { + fprintf(stderr, "spe_context_create() failed\n"); + exit(1); + } + + if (spe_program_load(cell_global.spe_contexts[i], &g3d_spu)) { + fprintf(stderr, "spe_program_load() failed\n"); + exit(1); + } + + pthread_create(&cell_global.spe_threads[i], /* returned thread handle */ + NULL, /* pthread attribs */ + &cell_thread_function, /* start routine */ + &cell_global.inits[i]); /* thread argument */ + } +} + + +/** + * Tell all the SPUs to stop/exit. + * This is done when the driver's exiting / cleaning up. + */ +void +cell_spu_exit(struct cell_context *cell) +{ + uint i; + + for (i = 0; i < cell->num_spus; i++) { + send_mbox_message(cell_global.spe_contexts[i], CELL_CMD_EXIT); + } + + /* wait for threads to exit */ + for (i = 0; i < cell->num_spus; i++) { + void *value; + pthread_join(cell_global.spe_threads[i], &value); + cell_global.spe_threads[i] = 0; + cell_global.spe_contexts[i] = 0; + } +} |