diff options
Diffstat (limited to 'src/intel/dev/gen_device_info.c')
| -rw-r--r-- | src/intel/dev/gen_device_info.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/src/intel/dev/gen_device_info.c b/src/intel/dev/gen_device_info.c index acf921b60ae..f7cb94f1795 100644 --- a/src/intel/dev/gen_device_info.c +++ b/src/intel/dev/gen_device_info.c @@ -28,8 +28,11 @@ #include <unistd.h> #include "gen_device_info.h" #include "compiler/shader_enums.h" +#include "util/bitscan.h" #include "util/macros.h" +#include <i915_drm.h> + /** * Get the PCI ID for the device name. * @@ -925,6 +928,129 @@ fill_masks(struct gen_device_info *devinfo) } } +void +gen_device_info_update_from_masks(struct gen_device_info *devinfo, + uint32_t slice_mask, + uint32_t subslice_mask, + uint32_t n_eus) +{ + struct { + struct drm_i915_query_topology_info base; + uint8_t data[100]; + } topology; + + assert((slice_mask & 0xff) == slice_mask); + + memset(&topology, 0, sizeof(topology)); + + topology.base.max_slices = util_last_bit(slice_mask); + topology.base.max_subslices = util_last_bit(subslice_mask); + + topology.base.subslice_offset = DIV_ROUND_UP(topology.base.max_slices, 8); + topology.base.subslice_stride = DIV_ROUND_UP(topology.base.max_subslices, 8); + + uint32_t n_subslices = __builtin_popcount(slice_mask) * + __builtin_popcount(subslice_mask); + uint32_t num_eu_per_subslice = DIV_ROUND_UP(n_eus, n_subslices); + uint32_t eu_mask = (1U << num_eu_per_subslice) - 1; + + topology.base.eu_offset = topology.base.subslice_offset + + DIV_ROUND_UP(topology.base.max_subslices, 8); + topology.base.eu_stride = DIV_ROUND_UP(num_eu_per_subslice, 8); + + /* Set slice mask in topology */ + for (int b = 0; b < topology.base.subslice_offset; b++) + topology.base.data[b] = (slice_mask >> (b * 8)) & 0xff; + + for (int s = 0; s < topology.base.max_slices; s++) { + + /* Set subslice mask in topology */ + for (int b = 0; b < topology.base.subslice_stride; b++) { + int subslice_offset = topology.base.subslice_offset + + s * topology.base.subslice_stride + b; + + topology.base.data[subslice_offset] = (subslice_mask >> (b * 8)) & 0xff; + } + + /* Set eu mask in topology */ + for (int ss = 0; ss < topology.base.max_subslices; ss++) { + for (int b = 0; b < topology.base.eu_stride; b++) { + int eu_offset = topology.base.eu_offset + + (s * topology.base.max_subslices + ss) * topology.base.eu_stride + b; + + topology.base.data[eu_offset] = (eu_mask >> (b * 8)) & 0xff; + } + } + } + + gen_device_info_update_from_topology(devinfo, &topology.base); +} + +static void +reset_masks(struct gen_device_info *devinfo) +{ + devinfo->subslice_slice_stride = 0; + devinfo->eu_subslice_stride = 0; + devinfo->eu_slice_stride = 0; + + devinfo->num_slices = 0; + devinfo->num_eu_per_subslice = 0; + memset(devinfo->num_subslices, 0, sizeof(devinfo->num_subslices)); + + memset(&devinfo->slice_masks, 0, sizeof(devinfo->slice_masks)); + memset(devinfo->subslice_masks, 0, sizeof(devinfo->subslice_masks)); + memset(devinfo->eu_masks, 0, sizeof(devinfo->eu_masks)); +} + +void +gen_device_info_update_from_topology(struct gen_device_info *devinfo, + const struct drm_i915_query_topology_info *topology) +{ + reset_masks(devinfo); + + devinfo->subslice_slice_stride = topology->subslice_stride; + + devinfo->eu_subslice_stride = DIV_ROUND_UP(topology->max_eus_per_subslice, 8); + devinfo->eu_slice_stride = topology->max_subslices * devinfo->eu_subslice_stride; + + assert(sizeof(devinfo->slice_masks) >= DIV_ROUND_UP(topology->max_slices, 8)); + memcpy(&devinfo->slice_masks, topology->data, DIV_ROUND_UP(topology->max_slices, 8)); + devinfo->num_slices = __builtin_popcount(devinfo->slice_masks); + + uint32_t subslice_mask_len = + topology->max_slices * topology->subslice_stride; + assert(sizeof(devinfo->subslice_masks) >= subslice_mask_len); + memcpy(devinfo->subslice_masks, &topology->data[topology->subslice_offset], + subslice_mask_len); + + uint32_t n_subslices = 0; + for (int s = 0; s < topology->max_slices; s++) { + if ((devinfo->slice_masks & (1UL << s)) == 0) + continue; + + for (int b = 0; b < devinfo->subslice_slice_stride; b++) { + devinfo->num_subslices[s] += + __builtin_popcount(devinfo->subslice_masks[b]); + } + n_subslices += devinfo->num_subslices[s]; + } + + uint32_t eu_mask_len = + topology->eu_stride * topology->max_subslices * topology->max_slices; + assert(sizeof(devinfo->eu_masks) >= eu_mask_len); + memcpy(devinfo->eu_masks, &topology->data[topology->eu_offset], eu_mask_len); + + uint32_t n_eus = 0; + for (int b = 0; b < eu_mask_len; b++) + n_eus += __builtin_popcount(devinfo->eu_masks[b]); + + /* We expect the total number of EUs to be uniformly distributed throughout + * the subslices. + */ + assert((n_eus % n_subslices) == 0); + devinfo->num_eu_per_subslice = n_eus / n_subslices; +} + bool gen_get_device_info(int devid, struct gen_device_info *devinfo) { |