Implement the helpers and use them for save and restore of MMIO migration data in stop_copy / resume device state.
Signed-off-by: Michał Winiarski <[email protected]> --- drivers/gpu/drm/xe/xe_gt_sriov_pf.h | 2 + drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c | 13 ++ drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c | 158 ++++++++++++++++++ drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h | 3 + 4 files changed, 176 insertions(+) diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf.h b/drivers/gpu/drm/xe/xe_gt_sriov_pf.h index e7fde3f9937af..c0dcbb1054e4d 100644 --- a/drivers/gpu/drm/xe/xe_gt_sriov_pf.h +++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf.h @@ -6,6 +6,8 @@ #ifndef _XE_GT_SRIOV_PF_H_ #define _XE_GT_SRIOV_PF_H_ +#include <linux/types.h> + struct xe_gt; #ifdef CONFIG_PCI_IOV diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c b/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c index e7ea9b88fd246..7cd7cae950bc7 100644 --- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c +++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c @@ -870,6 +870,16 @@ static int pf_handle_vf_save_data(struct xe_gt *gt, unsigned int vfid) return -EAGAIN; } + if (xe_gt_sriov_pf_migration_save_test(gt, vfid, XE_SRIOV_MIGRATION_DATA_TYPE_MMIO)) { + ret = xe_gt_sriov_pf_migration_mmio_save(gt, vfid); + if (ret) + return ret; + + xe_gt_sriov_pf_migration_save_clear(gt, vfid, XE_SRIOV_MIGRATION_DATA_TYPE_MMIO); + + return -EAGAIN; + } + return 0; } @@ -1079,6 +1089,9 @@ static int pf_handle_vf_restore_data(struct xe_gt *gt, unsigned int vfid) case XE_SRIOV_MIGRATION_DATA_TYPE_GGTT: ret = xe_gt_sriov_pf_migration_ggtt_restore(gt, vfid, data); break; + case XE_SRIOV_MIGRATION_DATA_TYPE_MMIO: + ret = xe_gt_sriov_pf_migration_mmio_restore(gt, vfid, data); + break; case XE_SRIOV_MIGRATION_DATA_TYPE_GUC: ret = xe_gt_sriov_pf_migration_guc_restore(gt, vfid, data); break; diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c b/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c index 6f2ee5820bdd4..5e90aeafeeb41 100644 --- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c +++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c @@ -5,10 +5,13 @@ #include <drm/drm_managed.h> +#include "regs/xe_guc_regs.h" + #include "abi/guc_actions_sriov_abi.h" #include "xe_bo.h" #include "xe_ggtt.h" #include "xe_gt.h" +#include "xe_gt_sriov_pf.h" #include "xe_gt_sriov_pf_config.h" #include "xe_gt_sriov_pf_control.h" #include "xe_gt_sriov_pf_helpers.h" @@ -16,6 +19,7 @@ #include "xe_gt_sriov_printk.h" #include "xe_guc_buf.h" #include "xe_guc_ct.h" +#include "xe_mmio.h" #include "xe_sriov.h" #include "xe_sriov_migration_data.h" #include "xe_sriov_pf_migration.h" @@ -357,6 +361,150 @@ int xe_gt_sriov_pf_migration_guc_restore(struct xe_gt *gt, unsigned int vfid, return pf_restore_vf_guc_state(gt, vfid, data); } +static ssize_t pf_migration_mmio_size(struct xe_gt *gt, unsigned int vfid) +{ + if (xe_gt_is_media_type(gt)) + return MED_VF_SW_FLAG_COUNT * sizeof(u32); + else + return VF_SW_FLAG_COUNT * sizeof(u32); +} + +static int pf_migration_mmio_save(struct xe_gt *gt, unsigned int vfid, void *buf, size_t size) +{ + struct xe_mmio mmio; + u32 *regs = buf; + int n; + + xe_mmio_init_vf_view(&mmio, >->mmio, vfid); + + if (size != pf_migration_mmio_size(gt, vfid)) + return -EINVAL; + + if (xe_gt_is_media_type(gt)) + for (n = 0; n < MED_VF_SW_FLAG_COUNT; n++) + regs[n] = xe_mmio_read32(>->mmio, MED_VF_SW_FLAG(n)); + else + for (n = 0; n < VF_SW_FLAG_COUNT; n++) + regs[n] = xe_mmio_read32(>->mmio, VF_SW_FLAG(n)); + + return 0; +} + +static int pf_migration_mmio_restore(struct xe_gt *gt, unsigned int vfid, + const void *buf, size_t size) +{ + const u32 *regs = buf; + struct xe_mmio mmio; + int n; + + xe_mmio_init_vf_view(&mmio, >->mmio, vfid); + + if (size != pf_migration_mmio_size(gt, vfid)) + return -EINVAL; + + if (xe_gt_is_media_type(gt)) + for (n = 0; n < MED_VF_SW_FLAG_COUNT; n++) + xe_mmio_write32(>->mmio, MED_VF_SW_FLAG(n), regs[n]); + else + for (n = 0; n < VF_SW_FLAG_COUNT; n++) + xe_mmio_write32(>->mmio, VF_SW_FLAG(n), regs[n]); + + return 0; +} + +static int pf_save_vf_mmio_mig_data(struct xe_gt *gt, unsigned int vfid) +{ + struct xe_sriov_migration_data *data; + size_t size; + int ret; + + size = pf_migration_mmio_size(gt, vfid); + xe_gt_assert(gt, size); + + data = xe_sriov_migration_data_alloc(gt_to_xe(gt)); + if (!data) + return -ENOMEM; + + ret = xe_sriov_migration_data_init(data, gt->tile->id, gt->info.id, + XE_SRIOV_MIGRATION_DATA_TYPE_MMIO, 0, size); + if (ret) + goto fail; + + ret = pf_migration_mmio_save(gt, vfid, data->vaddr, size); + if (ret) + goto fail; + + xe_gt_sriov_dbg_verbose(gt, "VF%u MMIO data save (%zu bytes)\n", vfid, size); + pf_dump_mig_data(gt, vfid, data); + + ret = xe_gt_sriov_pf_migration_save_produce(gt, vfid, data); + if (ret) + goto fail; + + return 0; + +fail: + xe_sriov_migration_data_free(data); + xe_gt_sriov_err(gt, "Failed to save VF%u MMIO data (%pe)\n", vfid, ERR_PTR(ret)); + return ret; +} + +static int pf_restore_vf_mmio_mig_data(struct xe_gt *gt, unsigned int vfid, + struct xe_sriov_migration_data *data) +{ + int ret; + + xe_gt_sriov_dbg_verbose(gt, "VF%u MMIO data restore (%llu bytes)\n", vfid, data->size); + pf_dump_mig_data(gt, vfid, data); + + ret = pf_migration_mmio_restore(gt, vfid, data->vaddr, data->size); + if (ret) { + xe_gt_sriov_err(gt, "Failed to restore VF%u MMIO data (%pe)\n", + vfid, ERR_PTR(ret)); + + return ret; + } + + return 0; +} + +/** + * xe_gt_sriov_pf_migration_mmio_save() - Save VF MMIO migration data. + * @gt: the &xe_gt + * @vfid: the VF identifier (can't be 0) + * + * This function is for PF only. + * + * Return: 0 on success or a negative error code on failure. + */ +int xe_gt_sriov_pf_migration_mmio_save(struct xe_gt *gt, unsigned int vfid) +{ + xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt))); + xe_gt_assert(gt, vfid != PFID); + xe_gt_assert(gt, vfid <= xe_sriov_pf_get_totalvfs(gt_to_xe(gt))); + + return pf_save_vf_mmio_mig_data(gt, vfid); +} + +/** + * xe_gt_sriov_pf_migration_mmio_restore() - Restore VF MMIO migration data. + * @gt: the &xe_gt + * @vfid: the VF identifier (can't be 0) + * + * This function is for PF only. + * + * Return: 0 on success or a negative error code on failure. + */ +int xe_gt_sriov_pf_migration_mmio_restore(struct xe_gt *gt, unsigned int vfid, + struct xe_sriov_migration_data *data) +{ + xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt))); + xe_gt_assert(gt, vfid != PFID); + xe_gt_assert(gt, vfid <= xe_sriov_pf_get_totalvfs(gt_to_xe(gt))); + + return pf_restore_vf_mmio_mig_data(gt, vfid, data); +} + /** * xe_gt_sriov_pf_migration_size() - Total size of migration data from all components within a GT. * @gt: the &xe_gt @@ -389,6 +537,13 @@ ssize_t xe_gt_sriov_pf_migration_size(struct xe_gt *gt, unsigned int vfid) size += sizeof(struct xe_sriov_pf_migration_hdr); total += size; + size = pf_migration_mmio_size(gt, vfid); + if (size < 0) + return size; + if (size > 0) + size += sizeof(struct xe_sriov_pf_migration_hdr); + total += size; + return total; } @@ -453,6 +608,9 @@ void xe_gt_sriov_pf_migration_save_init(struct xe_gt *gt, unsigned int vfid) if (pf_migration_ggtt_size(gt, vfid) > 0) set_bit(XE_SRIOV_MIGRATION_DATA_TYPE_GGTT, &migration->save.data_remaining); + + xe_gt_assert(gt, pf_migration_mmio_size(gt, vfid) > 0); + set_bit(XE_SRIOV_MIGRATION_DATA_TYPE_MMIO, &migration->save.data_remaining); } /** diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h b/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h index bc201d8f3147a..b0eec94fea3a6 100644 --- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h +++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h @@ -22,6 +22,9 @@ int xe_gt_sriov_pf_migration_guc_restore(struct xe_gt *gt, unsigned int vfid, int xe_gt_sriov_pf_migration_ggtt_save(struct xe_gt *gt, unsigned int vfid); int xe_gt_sriov_pf_migration_ggtt_restore(struct xe_gt *gt, unsigned int vfid, struct xe_sriov_migration_data *data); +int xe_gt_sriov_pf_migration_mmio_save(struct xe_gt *gt, unsigned int vfid); +int xe_gt_sriov_pf_migration_mmio_restore(struct xe_gt *gt, unsigned int vfid, + struct xe_sriov_migration_data *data); ssize_t xe_gt_sriov_pf_migration_size(struct xe_gt *gt, unsigned int vfid); -- 2.50.1
