diff options
Diffstat (limited to 'drivers/gpu/drm/xe/xe_gt_sriov_vf.c')
| -rw-r--r-- | drivers/gpu/drm/xe/xe_gt_sriov_vf.c | 792 |
1 files changed, 575 insertions, 217 deletions
diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_vf.c b/drivers/gpu/drm/xe/xe_gt_sriov_vf.c index d3baba50f085..4c73a077d314 100644 --- a/drivers/gpu/drm/xe/xe_gt_sriov_vf.c +++ b/drivers/gpu/drm/xe/xe_gt_sriov_vf.c @@ -23,10 +23,19 @@ #include "xe_gt_sriov_vf.h" #include "xe_gt_sriov_vf_types.h" #include "xe_guc.h" +#include "xe_guc_ct.h" #include "xe_guc_hxg_helpers.h" #include "xe_guc_relay.h" +#include "xe_guc_submit.h" +#include "xe_irq.h" +#include "xe_lrc.h" +#include "xe_memirq.h" #include "xe_mmio.h" #include "xe_sriov.h" +#include "xe_sriov_vf.h" +#include "xe_sriov_vf_ccs.h" +#include "xe_tile_sriov_vf.h" +#include "xe_tlb_inval.h" #include "xe_uc_fw.h" #include "xe_wopcm.h" @@ -46,29 +55,52 @@ static int guc_action_vf_reset(struct xe_guc *guc) return ret > 0 ? -EPROTO : ret; } +#define GUC_RESET_VF_STATE_RETRY_MAX 10 static int vf_reset_guc_state(struct xe_gt *gt) { + unsigned int retry = GUC_RESET_VF_STATE_RETRY_MAX; struct xe_guc *guc = >->uc.guc; int err; - err = guc_action_vf_reset(guc); + do { + err = guc_action_vf_reset(guc); + if (!err || err != -ETIMEDOUT) + break; + } while (--retry); + if (unlikely(err)) xe_gt_sriov_err(gt, "Failed to reset GuC state (%pe)\n", ERR_PTR(err)); return err; } +/** + * xe_gt_sriov_vf_reset - Reset GuC VF internal state. + * @gt: the &xe_gt + * + * It requires functional `GuC MMIO based communication`_. + * + * Return: 0 on success or a negative error code on failure. + */ +int xe_gt_sriov_vf_reset(struct xe_gt *gt) +{ + if (!xe_device_uc_enabled(gt_to_xe(gt))) + return -ENODEV; + + return vf_reset_guc_state(gt); +} + static int guc_action_match_version(struct xe_guc *guc, - u32 wanted_branch, u32 wanted_major, u32 wanted_minor, - u32 *branch, u32 *major, u32 *minor, u32 *patch) + struct xe_uc_fw_version *wanted, + struct xe_uc_fw_version *found) { u32 request[VF2GUC_MATCH_VERSION_REQUEST_MSG_LEN] = { FIELD_PREP(GUC_HXG_MSG_0_ORIGIN, GUC_HXG_ORIGIN_HOST) | FIELD_PREP(GUC_HXG_MSG_0_TYPE, GUC_HXG_TYPE_REQUEST) | FIELD_PREP(GUC_HXG_REQUEST_MSG_0_ACTION, GUC_ACTION_VF2GUC_MATCH_VERSION), - FIELD_PREP(VF2GUC_MATCH_VERSION_REQUEST_MSG_1_BRANCH, wanted_branch) | - FIELD_PREP(VF2GUC_MATCH_VERSION_REQUEST_MSG_1_MAJOR, wanted_major) | - FIELD_PREP(VF2GUC_MATCH_VERSION_REQUEST_MSG_1_MINOR, wanted_minor), + FIELD_PREP(VF2GUC_MATCH_VERSION_REQUEST_MSG_1_BRANCH, wanted->branch) | + FIELD_PREP(VF2GUC_MATCH_VERSION_REQUEST_MSG_1_MAJOR, wanted->major) | + FIELD_PREP(VF2GUC_MATCH_VERSION_REQUEST_MSG_1_MINOR, wanted->minor), }; u32 response[GUC_MAX_MMIO_MSG_LEN]; int ret; @@ -82,120 +114,138 @@ static int guc_action_match_version(struct xe_guc *guc, if (unlikely(FIELD_GET(VF2GUC_MATCH_VERSION_RESPONSE_MSG_0_MBZ, response[0]))) return -EPROTO; - *branch = FIELD_GET(VF2GUC_MATCH_VERSION_RESPONSE_MSG_1_BRANCH, response[1]); - *major = FIELD_GET(VF2GUC_MATCH_VERSION_RESPONSE_MSG_1_MAJOR, response[1]); - *minor = FIELD_GET(VF2GUC_MATCH_VERSION_RESPONSE_MSG_1_MINOR, response[1]); - *patch = FIELD_GET(VF2GUC_MATCH_VERSION_RESPONSE_MSG_1_PATCH, response[1]); + memset(found, 0, sizeof(struct xe_uc_fw_version)); + found->branch = FIELD_GET(VF2GUC_MATCH_VERSION_RESPONSE_MSG_1_BRANCH, response[1]); + found->major = FIELD_GET(VF2GUC_MATCH_VERSION_RESPONSE_MSG_1_MAJOR, response[1]); + found->minor = FIELD_GET(VF2GUC_MATCH_VERSION_RESPONSE_MSG_1_MINOR, response[1]); + found->patch = FIELD_GET(VF2GUC_MATCH_VERSION_RESPONSE_MSG_1_PATCH, response[1]); return 0; } -static void vf_minimum_guc_version(struct xe_gt *gt, u32 *branch, u32 *major, u32 *minor) +static int guc_action_match_version_any(struct xe_guc *guc, + struct xe_uc_fw_version *found) +{ + struct xe_uc_fw_version wanted = { + .branch = GUC_VERSION_BRANCH_ANY, + .major = GUC_VERSION_MAJOR_ANY, + .minor = GUC_VERSION_MINOR_ANY, + .patch = 0 + }; + + return guc_action_match_version(guc, &wanted, found); +} + +static void vf_minimum_guc_version(struct xe_gt *gt, struct xe_uc_fw_version *ver) { struct xe_device *xe = gt_to_xe(gt); + memset(ver, 0, sizeof(struct xe_uc_fw_version)); + switch (xe->info.platform) { case XE_TIGERLAKE ... XE_PVC: /* 1.1 this is current baseline for Xe driver */ - *branch = 0; - *major = 1; - *minor = 1; + ver->branch = 0; + ver->major = 1; + ver->minor = 1; break; default: /* 1.2 has support for the GMD_ID KLV */ - *branch = 0; - *major = 1; - *minor = 2; + ver->branch = 0; + ver->major = 1; + ver->minor = 2; break; } } -static void vf_wanted_guc_version(struct xe_gt *gt, u32 *branch, u32 *major, u32 *minor) +static void vf_wanted_guc_version(struct xe_gt *gt, struct xe_uc_fw_version *ver) { /* for now it's the same as minimum */ - return vf_minimum_guc_version(gt, branch, major, minor); + return vf_minimum_guc_version(gt, ver); } static int vf_handshake_with_guc(struct xe_gt *gt) { - struct xe_gt_sriov_vf_guc_version *guc_version = >->sriov.vf.guc_version; + struct xe_uc_fw_version *guc_version = >->sriov.vf.guc_version; + struct xe_uc_fw_version wanted = {0}; struct xe_guc *guc = >->uc.guc; - u32 wanted_branch, wanted_major, wanted_minor; - u32 branch, major, minor, patch; + bool old = false; int err; xe_gt_assert(gt, IS_SRIOV_VF(gt_to_xe(gt))); /* select wanted version - prefer previous (if any) */ if (guc_version->major || guc_version->minor) { - wanted_branch = guc_version->branch; - wanted_major = guc_version->major; - wanted_minor = guc_version->minor; + wanted = *guc_version; + old = true; } else { - vf_wanted_guc_version(gt, &wanted_branch, &wanted_major, &wanted_minor); - xe_gt_assert(gt, wanted_major != GUC_VERSION_MAJOR_ANY); + vf_wanted_guc_version(gt, &wanted); + xe_gt_assert(gt, wanted.major != GUC_VERSION_MAJOR_ANY); + + /* First time we handshake, so record the minimum wanted */ + gt->sriov.vf.wanted_guc_version = wanted; } - err = guc_action_match_version(guc, wanted_branch, wanted_major, wanted_minor, - &branch, &major, &minor, &patch); + err = guc_action_match_version(guc, &wanted, guc_version); if (unlikely(err)) goto fail; - /* we don't support interface version change */ - if ((guc_version->major || guc_version->minor) && - (guc_version->branch != branch || guc_version->major != major || - guc_version->minor != minor)) { - xe_gt_sriov_err(gt, "New GuC interface version detected: %u.%u.%u.%u\n", - branch, major, minor, patch); - xe_gt_sriov_info(gt, "Previously used version was: %u.%u.%u.%u\n", - guc_version->branch, guc_version->major, - guc_version->minor, guc_version->patch); - err = -EREMCHG; - goto fail; + if (old) { + /* we don't support interface version change */ + if (MAKE_GUC_VER_STRUCT(*guc_version) != MAKE_GUC_VER_STRUCT(wanted)) { + xe_gt_sriov_err(gt, "New GuC interface version detected: %u.%u.%u.%u\n", + guc_version->branch, guc_version->major, + guc_version->minor, guc_version->patch); + xe_gt_sriov_info(gt, "Previously used version was: %u.%u.%u.%u\n", + wanted.branch, wanted.major, + wanted.minor, wanted.patch); + err = -EREMCHG; + goto fail; + } else { + /* version is unchanged, no need to re-verify it */ + return 0; + } } /* illegal */ - if (major > wanted_major) { + if (guc_version->major > wanted.major) { err = -EPROTO; goto unsupported; } /* there's no fallback on major version. */ - if (major != wanted_major) { + if (guc_version->major != wanted.major) { err = -ENOPKG; goto unsupported; } /* check against minimum version supported by us */ - vf_minimum_guc_version(gt, &wanted_branch, &wanted_major, &wanted_minor); - xe_gt_assert(gt, major != GUC_VERSION_MAJOR_ANY); - if (major < wanted_major || (major == wanted_major && minor < wanted_minor)) { + vf_minimum_guc_version(gt, &wanted); + xe_gt_assert(gt, wanted.major != GUC_VERSION_MAJOR_ANY); + if (MAKE_GUC_VER_STRUCT(*guc_version) < MAKE_GUC_VER_STRUCT(wanted)) { err = -ENOKEY; goto unsupported; } xe_gt_sriov_dbg(gt, "using GuC interface version %u.%u.%u.%u\n", - branch, major, minor, patch); + guc_version->branch, guc_version->major, + guc_version->minor, guc_version->patch); - guc_version->branch = branch; - guc_version->major = major; - guc_version->minor = minor; - guc_version->patch = patch; return 0; unsupported: xe_gt_sriov_err(gt, "Unsupported GuC version %u.%u.%u.%u (%pe)\n", - branch, major, minor, patch, ERR_PTR(err)); + guc_version->branch, guc_version->major, + guc_version->minor, guc_version->patch, + ERR_PTR(err)); fail: xe_gt_sriov_err(gt, "Unable to confirm GuC version %u.%u (%pe)\n", - wanted_major, wanted_minor, ERR_PTR(err)); + wanted.major, wanted.minor, ERR_PTR(err)); /* try again with *any* just to query which version is supported */ - if (!guc_action_match_version(guc, GUC_VERSION_BRANCH_ANY, - GUC_VERSION_MAJOR_ANY, GUC_VERSION_MINOR_ANY, - &branch, &major, &minor, &patch)) + if (!guc_action_match_version_any(guc, &wanted)) xe_gt_sriov_notice(gt, "GuC reports interface version %u.%u.%u.%u\n", - branch, major, minor, patch); + wanted.branch, wanted.major, wanted.minor, wanted.patch); return err; } @@ -212,6 +262,9 @@ int xe_gt_sriov_vf_bootstrap(struct xe_gt *gt) { int err; + if (!xe_device_uc_enabled(gt_to_xe(gt))) + return -ENODEV; + err = vf_reset_guc_state(gt); if (unlikely(err)) return err; @@ -223,6 +276,67 @@ int xe_gt_sriov_vf_bootstrap(struct xe_gt *gt) return 0; } +/** + * xe_gt_sriov_vf_guc_versions - Minimum required and found GuC ABI versions + * @gt: the &xe_gt + * @wanted: pointer to the xe_uc_fw_version to be filled with the wanted version + * @found: pointer to the xe_uc_fw_version to be filled with the found version + * + * This function is for VF use only and it can only be used after successful + * version handshake with the GuC. + */ +void xe_gt_sriov_vf_guc_versions(struct xe_gt *gt, + struct xe_uc_fw_version *wanted, + struct xe_uc_fw_version *found) +{ + xe_gt_assert(gt, IS_SRIOV_VF(gt_to_xe(gt))); + xe_gt_assert(gt, gt->sriov.vf.guc_version.major); + + if (wanted) + *wanted = gt->sriov.vf.wanted_guc_version; + + if (found) + *found = gt->sriov.vf.guc_version; +} + +static int guc_action_vf_notify_resfix_done(struct xe_guc *guc) +{ + u32 request[GUC_HXG_REQUEST_MSG_MIN_LEN] = { + FIELD_PREP(GUC_HXG_MSG_0_ORIGIN, GUC_HXG_ORIGIN_HOST) | + FIELD_PREP(GUC_HXG_MSG_0_TYPE, GUC_HXG_TYPE_REQUEST) | + FIELD_PREP(GUC_HXG_REQUEST_MSG_0_ACTION, GUC_ACTION_VF2GUC_NOTIFY_RESFIX_DONE), + }; + int ret; + + ret = xe_guc_mmio_send(guc, request, ARRAY_SIZE(request)); + + return ret > 0 ? -EPROTO : ret; +} + +/** + * vf_notify_resfix_done - Notify GuC about resource fixups apply completed. + * @gt: the &xe_gt struct instance linked to target GuC + * + * Returns: 0 if the operation completed successfully, or a negative error + * code otherwise. + */ +static int vf_notify_resfix_done(struct xe_gt *gt) +{ + struct xe_guc *guc = >->uc.guc; + int err; + + xe_gt_assert(gt, IS_SRIOV_VF(gt_to_xe(gt))); + + err = guc_action_vf_notify_resfix_done(guc); + if (unlikely(err)) + xe_gt_sriov_err(gt, "Failed to notify GuC about resource fixup done (%pe)\n", + ERR_PTR(err)); + else + xe_gt_sriov_dbg_verbose(gt, "sent GuC resource fixup done\n"); + + return err; +} + static int guc_action_query_single_klv(struct xe_guc *guc, u32 key, u32 *value, u32 value_len) { @@ -326,13 +440,17 @@ u32 xe_gt_sriov_vf_gmdid(struct xe_gt *gt) static int vf_get_ggtt_info(struct xe_gt *gt) { - struct xe_gt_sriov_vf_selfconfig *config = >->sriov.vf.self_config; + struct xe_tile *tile = gt_to_tile(gt); + struct xe_ggtt *ggtt = tile->mem.ggtt; struct xe_guc *guc = >->uc.guc; - u64 start, size; + u64 start, size, ggtt_size; + s64 shift; int err; xe_gt_assert(gt, IS_SRIOV_VF(gt_to_xe(gt))); + guard(mutex)(&ggtt->lock); + err = guc_action_query_single_klv64(guc, GUC_KLV_VF_CFG_GGTT_START_KEY, &start); if (unlikely(err)) return err; @@ -341,27 +459,44 @@ static int vf_get_ggtt_info(struct xe_gt *gt) if (unlikely(err)) return err; - if (config->ggtt_size && config->ggtt_size != size) { + if (!size) + return -ENODATA; + + ggtt_size = xe_tile_sriov_vf_ggtt(tile); + if (ggtt_size && ggtt_size != size) { xe_gt_sriov_err(gt, "Unexpected GGTT reassignment: %lluK != %lluK\n", - size / SZ_1K, config->ggtt_size / SZ_1K); + size / SZ_1K, ggtt_size / SZ_1K); return -EREMCHG; } xe_gt_sriov_dbg_verbose(gt, "GGTT %#llx-%#llx = %lluK\n", start, start + size - 1, size / SZ_1K); - config->ggtt_base = start; - config->ggtt_size = size; + shift = start - (s64)xe_tile_sriov_vf_ggtt_base(tile); + xe_tile_sriov_vf_ggtt_base_store(tile, start); + xe_tile_sriov_vf_ggtt_store(tile, size); - return config->ggtt_size ? 0 : -ENODATA; + if (shift && shift != start) { + xe_gt_sriov_info(gt, "Shifting GGTT base by %lld to 0x%016llx\n", + shift, start); + xe_tile_sriov_vf_fixup_ggtt_nodes_locked(gt_to_tile(gt), shift); + } + + if (xe_sriov_vf_migration_supported(gt_to_xe(gt))) { + WRITE_ONCE(gt->sriov.vf.migration.ggtt_need_fixes, false); + smp_wmb(); /* Ensure above write visible before wake */ + wake_up_all(>->sriov.vf.migration.wq); + } + + return 0; } static int vf_get_lmem_info(struct xe_gt *gt) { - struct xe_gt_sriov_vf_selfconfig *config = >->sriov.vf.self_config; + struct xe_tile *tile = gt_to_tile(gt); struct xe_guc *guc = >->uc.guc; char size_str[10]; - u64 size; + u64 size, lmem_size; int err; xe_gt_assert(gt, IS_SRIOV_VF(gt_to_xe(gt))); @@ -370,18 +505,19 @@ static int vf_get_lmem_info(struct xe_gt *gt) if (unlikely(err)) return err; - if (config->lmem_size && config->lmem_size != size) { + lmem_size = xe_tile_sriov_vf_lmem(tile); + if (lmem_size && lmem_size != size) { xe_gt_sriov_err(gt, "Unexpected LMEM reassignment: %lluM != %lluM\n", - size / SZ_1M, config->lmem_size / SZ_1M); + size / SZ_1M, lmem_size / SZ_1M); return -EREMCHG; } string_get_size(size, 1, STRING_UNITS_2, size_str, sizeof(size_str)); xe_gt_sriov_dbg_verbose(gt, "LMEM %lluM %s\n", size / SZ_1M, size_str); - config->lmem_size = size; + xe_tile_sriov_vf_lmem_store(tile, size); - return config->lmem_size ? 0 : -ENODATA; + return size ? 0 : -ENODATA; } static int vf_get_submission_cfg(struct xe_gt *gt) @@ -432,7 +568,9 @@ static void vf_cache_gmdid(struct xe_gt *gt) * xe_gt_sriov_vf_query_config - Query SR-IOV config data over MMIO. * @gt: the &xe_gt * - * This function is for VF use only. + * This function is for VF use only. This function may shift the GGTT and is + * performed under GGTT lock, making this step visible to all GTs that share a + * GGTT. * * Return: 0 on success or a negative error code on failure. */ @@ -445,7 +583,7 @@ int xe_gt_sriov_vf_query_config(struct xe_gt *gt) if (unlikely(err)) return err; - if (IS_DGFX(xe) && !xe_gt_is_media_type(gt)) { + if (IS_DGFX(xe) && xe_gt_is_main_type(gt)) { err = vf_get_lmem_info(gt); if (unlikely(err)) return err; @@ -478,125 +616,6 @@ u16 xe_gt_sriov_vf_guc_ids(struct xe_gt *gt) return gt->sriov.vf.self_config.num_ctxs; } -/** - * xe_gt_sriov_vf_lmem - VF LMEM configuration. - * @gt: the &xe_gt - * - * This function is for VF use only. - * - * Return: size of the LMEM assigned to VF. - */ -u64 xe_gt_sriov_vf_lmem(struct xe_gt *gt) -{ - xe_gt_assert(gt, IS_SRIOV_VF(gt_to_xe(gt))); - xe_gt_assert(gt, gt->sriov.vf.guc_version.major); - xe_gt_assert(gt, gt->sriov.vf.self_config.lmem_size); - - return gt->sriov.vf.self_config.lmem_size; -} - -static struct xe_ggtt_node * -vf_balloon_ggtt_node(struct xe_ggtt *ggtt, u64 start, u64 end) -{ - struct xe_ggtt_node *node; - int err; - - node = xe_ggtt_node_init(ggtt); - if (IS_ERR(node)) - return node; - - err = xe_ggtt_node_insert_balloon(node, start, end); - if (err) { - xe_ggtt_node_fini(node); - return ERR_PTR(err); - } - - return node; -} - -static int vf_balloon_ggtt(struct xe_gt *gt) -{ - struct xe_gt_sriov_vf_selfconfig *config = >->sriov.vf.self_config; - struct xe_tile *tile = gt_to_tile(gt); - struct xe_ggtt *ggtt = tile->mem.ggtt; - struct xe_device *xe = gt_to_xe(gt); - u64 start, end; - - xe_gt_assert(gt, IS_SRIOV_VF(xe)); - xe_gt_assert(gt, !xe_gt_is_media_type(gt)); - - if (!config->ggtt_size) - return -ENODATA; - - /* - * VF can only use part of the GGTT as allocated by the PF: - * - * WOPCM GUC_GGTT_TOP - * |<------------ Total GGTT size ------------------>| - * - * VF GGTT base -->|<- size ->| - * - * +--------------------+----------+-----------------+ - * |////////////////////| block |\\\\\\\\\\\\\\\\\| - * +--------------------+----------+-----------------+ - * - * |<--- balloon[0] --->|<-- VF -->|<-- balloon[1] ->| - */ - - start = xe_wopcm_size(xe); - end = config->ggtt_base; - if (end != start) { - tile->sriov.vf.ggtt_balloon[0] = vf_balloon_ggtt_node(ggtt, start, end); - if (IS_ERR(tile->sriov.vf.ggtt_balloon[0])) - return PTR_ERR(tile->sriov.vf.ggtt_balloon[0]); - } - - start = config->ggtt_base + config->ggtt_size; - end = GUC_GGTT_TOP; - if (end != start) { - tile->sriov.vf.ggtt_balloon[1] = vf_balloon_ggtt_node(ggtt, start, end); - if (IS_ERR(tile->sriov.vf.ggtt_balloon[1])) { - xe_ggtt_node_remove_balloon(tile->sriov.vf.ggtt_balloon[0]); - return PTR_ERR(tile->sriov.vf.ggtt_balloon[1]); - } - } - - return 0; -} - -static void deballoon_ggtt(struct drm_device *drm, void *arg) -{ - struct xe_tile *tile = arg; - - xe_tile_assert(tile, IS_SRIOV_VF(tile_to_xe(tile))); - xe_ggtt_node_remove_balloon(tile->sriov.vf.ggtt_balloon[1]); - xe_ggtt_node_remove_balloon(tile->sriov.vf.ggtt_balloon[0]); -} - -/** - * xe_gt_sriov_vf_prepare_ggtt - Prepare a VF's GGTT configuration. - * @gt: the &xe_gt - * - * This function is for VF use only. - * - * Return: 0 on success or a negative error code on failure. - */ -int xe_gt_sriov_vf_prepare_ggtt(struct xe_gt *gt) -{ - struct xe_tile *tile = gt_to_tile(gt); - struct xe_device *xe = tile_to_xe(tile); - int err; - - if (xe_gt_is_media_type(gt)) - return 0; - - err = vf_balloon_ggtt(gt); - if (err) - return err; - - return drmm_add_action_or_reset(&xe->drm, deballoon_ggtt, tile); -} - static int relay_action_handshake(struct xe_gt *gt, u32 *major, u32 *minor) { u32 request[VF2PF_HANDSHAKE_REQUEST_MSG_LEN] = { @@ -629,21 +648,22 @@ static int relay_action_handshake(struct xe_gt *gt, u32 *major, u32 *minor) return 0; } -static void vf_connect_pf(struct xe_gt *gt, u16 major, u16 minor) +static void vf_connect_pf(struct xe_device *xe, u16 major, u16 minor) { - xe_gt_assert(gt, IS_SRIOV_VF(gt_to_xe(gt))); + xe_assert(xe, IS_SRIOV_VF(xe)); - gt->sriov.vf.pf_version.major = major; - gt->sriov.vf.pf_version.minor = minor; + xe->sriov.vf.pf_version.major = major; + xe->sriov.vf.pf_version.minor = minor; } -static void vf_disconnect_pf(struct xe_gt *gt) +static void vf_disconnect_pf(struct xe_device *xe) { - vf_connect_pf(gt, 0, 0); + vf_connect_pf(xe, 0, 0); } static int vf_handshake_with_pf(struct xe_gt *gt) { + struct xe_device *xe = gt_to_xe(gt); u32 major_wanted = GUC_RELAY_VERSION_LATEST_MAJOR; u32 minor_wanted = GUC_RELAY_VERSION_LATEST_MINOR; u32 major = major_wanted, minor = minor_wanted; @@ -659,13 +679,13 @@ static int vf_handshake_with_pf(struct xe_gt *gt) } xe_gt_sriov_dbg(gt, "using VF/PF ABI %u.%u\n", major, minor); - vf_connect_pf(gt, major, minor); + vf_connect_pf(xe, major, minor); return 0; failed: xe_gt_sriov_err(gt, "Unable to confirm VF/PF ABI version %u.%u (%pe)\n", major, minor, ERR_PTR(err)); - vf_disconnect_pf(gt); + vf_disconnect_pf(xe); return err; } @@ -692,12 +712,75 @@ failed: return err; } -static bool vf_is_negotiated(struct xe_gt *gt, u16 major, u16 minor) +/** + * xe_gt_sriov_vf_default_lrcs_hwsp_rebase - Update GGTT references in HWSP of default LRCs. + * @gt: the &xe_gt struct instance + */ +static void xe_gt_sriov_vf_default_lrcs_hwsp_rebase(struct xe_gt *gt) { + struct xe_hw_engine *hwe; + enum xe_hw_engine_id id; + + for_each_hw_engine(hwe, gt, id) + xe_default_lrc_update_memirq_regs_with_address(hwe); +} + +static void vf_start_migration_recovery(struct xe_gt *gt) +{ + bool started; + xe_gt_assert(gt, IS_SRIOV_VF(gt_to_xe(gt))); - return major == gt->sriov.vf.pf_version.major && - minor <= gt->sriov.vf.pf_version.minor; + spin_lock(>->sriov.vf.migration.lock); + + if (!gt->sriov.vf.migration.recovery_queued || + !gt->sriov.vf.migration.recovery_teardown) { + gt->sriov.vf.migration.recovery_queued = true; + WRITE_ONCE(gt->sriov.vf.migration.recovery_inprogress, true); + WRITE_ONCE(gt->sriov.vf.migration.ggtt_need_fixes, true); + smp_wmb(); /* Ensure above writes visible before wake */ + + xe_guc_ct_wake_waiters(>->uc.guc.ct); + + started = queue_work(gt->ordered_wq, >->sriov.vf.migration.worker); + xe_gt_sriov_info(gt, "VF migration recovery %s\n", started ? + "scheduled" : "already in progress"); + } + + spin_unlock(>->sriov.vf.migration.lock); +} + +/** + * xe_gt_sriov_vf_migrated_event_handler - Start a VF migration recovery, + * or just mark that a GuC is ready for it. + * @gt: the &xe_gt struct instance linked to target GuC + * + * This function shall be called only by VF. + */ +void xe_gt_sriov_vf_migrated_event_handler(struct xe_gt *gt) +{ + struct xe_device *xe = gt_to_xe(gt); + + xe_gt_assert(gt, IS_SRIOV_VF(xe)); + xe_gt_assert(gt, xe_gt_sriov_vf_recovery_pending(gt)); + + if (!xe_sriov_vf_migration_supported(xe)) { + xe_gt_sriov_err(gt, "migration not supported\n"); + return; + } + + xe_gt_sriov_info(gt, "ready for recovery after migration\n"); + vf_start_migration_recovery(gt); +} + +static bool vf_is_negotiated(struct xe_gt *gt, u16 major, u16 minor) +{ + struct xe_device *xe = gt_to_xe(gt); + + xe_gt_assert(gt, IS_SRIOV_VF(xe)); + + return major == xe->sriov.vf.pf_version.major && + minor <= xe->sriov.vf.pf_version.minor; } static int vf_prepare_runtime_info(struct xe_gt *gt, unsigned int num_regs) @@ -885,7 +968,6 @@ u32 xe_gt_sriov_vf_read32(struct xe_gt *gt, struct xe_reg reg) struct vf_runtime_reg *rr; xe_gt_assert(gt, IS_SRIOV_VF(gt_to_xe(gt))); - xe_gt_assert(gt, gt->sriov.vf.pf_version.major); xe_gt_assert(gt, !reg.vf); if (reg.addr == GMD_ID.addr) { @@ -943,20 +1025,25 @@ void xe_gt_sriov_vf_print_config(struct xe_gt *gt, struct drm_printer *p) { struct xe_gt_sriov_vf_selfconfig *config = >->sriov.vf.self_config; struct xe_device *xe = gt_to_xe(gt); + u64 lmem_size; char buf[10]; xe_gt_assert(gt, IS_SRIOV_VF(gt_to_xe(gt))); - drm_printf(p, "GGTT range:\t%#llx-%#llx\n", - config->ggtt_base, - config->ggtt_base + config->ggtt_size - 1); + if (xe_gt_is_main_type(gt)) { + u64 ggtt_size = xe_tile_sriov_vf_ggtt(gt_to_tile(gt)); + u64 ggtt_base = xe_tile_sriov_vf_ggtt_base(gt_to_tile(gt)); - string_get_size(config->ggtt_size, 1, STRING_UNITS_2, buf, sizeof(buf)); - drm_printf(p, "GGTT size:\t%llu (%s)\n", config->ggtt_size, buf); + drm_printf(p, "GGTT range:\t%#llx-%#llx\n", + ggtt_base, ggtt_base + ggtt_size - 1); + string_get_size(ggtt_size, 1, STRING_UNITS_2, buf, sizeof(buf)); + drm_printf(p, "GGTT size:\t%llu (%s)\n", ggtt_size, buf); - if (IS_DGFX(xe) && !xe_gt_is_media_type(gt)) { - string_get_size(config->lmem_size, 1, STRING_UNITS_2, buf, sizeof(buf)); - drm_printf(p, "LMEM size:\t%llu (%s)\n", config->lmem_size, buf); + if (IS_DGFX(xe)) { + lmem_size = xe_tile_sriov_vf_lmem(gt_to_tile(gt)); + string_get_size(lmem_size, 1, STRING_UNITS_2, buf, sizeof(buf)); + drm_printf(p, "LMEM size:\t%llu (%s)\n", lmem_size, buf); + } } drm_printf(p, "GuC contexts:\t%u\n", config->num_ctxs); @@ -990,19 +1077,21 @@ void xe_gt_sriov_vf_print_runtime(struct xe_gt *gt, struct drm_printer *p) */ void xe_gt_sriov_vf_print_version(struct xe_gt *gt, struct drm_printer *p) { - struct xe_gt_sriov_vf_guc_version *guc_version = >->sriov.vf.guc_version; - struct xe_gt_sriov_vf_relay_version *pf_version = >->sriov.vf.pf_version; - u32 branch, major, minor; + struct xe_device *xe = gt_to_xe(gt); + struct xe_uc_fw_version *guc_version = >->sriov.vf.guc_version; + struct xe_uc_fw_version *wanted = >->sriov.vf.wanted_guc_version; + struct xe_sriov_vf_relay_version *pf_version = &xe->sriov.vf.pf_version; + struct xe_uc_fw_version ver; xe_gt_assert(gt, IS_SRIOV_VF(gt_to_xe(gt))); drm_printf(p, "GuC ABI:\n"); - vf_minimum_guc_version(gt, &branch, &major, &minor); - drm_printf(p, "\tbase:\t%u.%u.%u.*\n", branch, major, minor); + vf_minimum_guc_version(gt, &ver); + drm_printf(p, "\tbase:\t%u.%u.%u.*\n", ver.branch, ver.major, ver.minor); - vf_wanted_guc_version(gt, &branch, &major, &minor); - drm_printf(p, "\twanted:\t%u.%u.%u.*\n", branch, major, minor); + drm_printf(p, "\twanted:\t%u.%u.%u.*\n", + wanted->branch, wanted->major, wanted->minor); drm_printf(p, "\thandshake:\t%u.%u.%u.%u\n", guc_version->branch, guc_version->major, @@ -1017,3 +1106,272 @@ void xe_gt_sriov_vf_print_version(struct xe_gt *gt, struct drm_printer *p) drm_printf(p, "\thandshake:\t%u.%u\n", pf_version->major, pf_version->minor); } + +static bool vf_post_migration_shutdown(struct xe_gt *gt) +{ + struct xe_device *xe = gt_to_xe(gt); + + /* + * On platforms where CCS must be restored by the primary GT, the media + * GT's VF post-migration recovery must run afterward. Detect this case + * and re-queue the media GT's restore work item if necessary. + */ + if (xe->info.needs_shared_vf_gt_wq && xe_gt_is_media_type(gt)) { + struct xe_gt *primary_gt = gt_to_tile(gt)->primary_gt; + + if (xe_gt_sriov_vf_recovery_pending(primary_gt)) + return true; + } + + spin_lock_irq(>->sriov.vf.migration.lock); + gt->sriov.vf.migration.recovery_queued = false; + spin_unlock_irq(>->sriov.vf.migration.lock); + + xe_guc_ct_flush_and_stop(>->uc.guc.ct); + xe_guc_submit_pause(>->uc.guc); + xe_tlb_inval_reset(>->tlb_inval); + + return false; +} + +static size_t post_migration_scratch_size(struct xe_device *xe) +{ + return max(xe_lrc_reg_size(xe), LRC_WA_BB_SIZE); +} + +static int vf_post_migration_fixups(struct xe_gt *gt) +{ + void *buf = gt->sriov.vf.migration.scratch; + int err; + + /* xe_gt_sriov_vf_query_config will fixup the GGTT addresses */ + err = xe_gt_sriov_vf_query_config(gt); + if (err) + return err; + + if (xe_gt_is_main_type(gt)) + xe_sriov_vf_ccs_rebase(gt_to_xe(gt)); + + xe_gt_sriov_vf_default_lrcs_hwsp_rebase(gt); + err = xe_guc_contexts_hwsp_rebase(>->uc.guc, buf); + if (err) + return err; + + return 0; +} + +static void vf_post_migration_rearm(struct xe_gt *gt) +{ + xe_guc_ct_restart(>->uc.guc.ct); + xe_guc_submit_unpause_prepare(>->uc.guc); +} + +static void vf_post_migration_kickstart(struct xe_gt *gt) +{ + xe_guc_submit_unpause(>->uc.guc); +} + +static void vf_post_migration_abort(struct xe_gt *gt) +{ + spin_lock_irq(>->sriov.vf.migration.lock); + WRITE_ONCE(gt->sriov.vf.migration.recovery_inprogress, false); + WRITE_ONCE(gt->sriov.vf.migration.ggtt_need_fixes, false); + spin_unlock_irq(>->sriov.vf.migration.lock); + + wake_up_all(>->sriov.vf.migration.wq); + + xe_guc_submit_pause_abort(>->uc.guc); +} + +static int vf_post_migration_notify_resfix_done(struct xe_gt *gt) +{ + bool skip_resfix = false; + + spin_lock_irq(>->sriov.vf.migration.lock); + if (gt->sriov.vf.migration.recovery_queued) { + skip_resfix = true; + xe_gt_sriov_dbg(gt, "another recovery imminent, resfix skipped\n"); + } else { + WRITE_ONCE(gt->sriov.vf.migration.recovery_inprogress, false); + } + spin_unlock_irq(>->sriov.vf.migration.lock); + + if (skip_resfix) + return -EAGAIN; + + /* + * Make sure interrupts on the new HW are properly set. The GuC IRQ + * must be working at this point, since the recovery did started, + * but the rest was not enabled using the procedure from spec. + */ + xe_irq_resume(gt_to_xe(gt)); + + return vf_notify_resfix_done(gt); +} + +static void vf_post_migration_recovery(struct xe_gt *gt) +{ + struct xe_device *xe = gt_to_xe(gt); + int err; + bool retry; + + xe_gt_sriov_dbg(gt, "migration recovery in progress\n"); + + retry = vf_post_migration_shutdown(gt); + if (retry) + goto queue; + + if (!xe_sriov_vf_migration_supported(xe)) { + xe_gt_sriov_err(gt, "migration is not supported\n"); + err = -ENOTRECOVERABLE; + goto fail; + } + + err = vf_post_migration_fixups(gt); + if (err) + goto fail; + + vf_post_migration_rearm(gt); + + err = vf_post_migration_notify_resfix_done(gt); + if (err && err != -EAGAIN) + goto fail; + + vf_post_migration_kickstart(gt); + + xe_gt_sriov_notice(gt, "migration recovery ended\n"); + return; +fail: + vf_post_migration_abort(gt); + xe_gt_sriov_err(gt, "migration recovery failed (%pe)\n", ERR_PTR(err)); + xe_device_declare_wedged(xe); + return; + +queue: + xe_gt_sriov_info(gt, "Re-queuing migration recovery\n"); + queue_work(gt->ordered_wq, >->sriov.vf.migration.worker); +} + +static void migration_worker_func(struct work_struct *w) +{ + struct xe_gt *gt = container_of(w, struct xe_gt, + sriov.vf.migration.worker); + + vf_post_migration_recovery(gt); +} + +static void vf_migration_fini(void *arg) +{ + struct xe_gt *gt = arg; + + spin_lock_irq(>->sriov.vf.migration.lock); + gt->sriov.vf.migration.recovery_teardown = true; + spin_unlock_irq(>->sriov.vf.migration.lock); + + cancel_work_sync(>->sriov.vf.migration.worker); +} + +/** + * xe_gt_sriov_vf_init_early() - GT VF init early + * @gt: the &xe_gt + * + * Return 0 on success, errno on failure + */ +int xe_gt_sriov_vf_init_early(struct xe_gt *gt) +{ + void *buf; + + if (!xe_sriov_vf_migration_supported(gt_to_xe(gt))) + return 0; + + buf = drmm_kmalloc(>_to_xe(gt)->drm, + post_migration_scratch_size(gt_to_xe(gt)), + GFP_KERNEL); + if (!buf) + return -ENOMEM; + + gt->sriov.vf.migration.scratch = buf; + spin_lock_init(>->sriov.vf.migration.lock); + INIT_WORK(>->sriov.vf.migration.worker, migration_worker_func); + init_waitqueue_head(>->sriov.vf.migration.wq); + + return 0; +} + +/** + * xe_gt_sriov_vf_init() - GT VF init + * @gt: the &xe_gt + * + * Return 0 on success, errno on failure + */ +int xe_gt_sriov_vf_init(struct xe_gt *gt) +{ + if (!xe_sriov_vf_migration_supported(gt_to_xe(gt))) + return 0; + + /* + * We want to tear down the VF post-migration early during driver + * unload; therefore, we add this finalization action later during + * driver load. + */ + return devm_add_action_or_reset(gt_to_xe(gt)->drm.dev, + vf_migration_fini, gt); +} + +/** + * xe_gt_sriov_vf_recovery_pending() - VF post migration recovery pending + * @gt: the &xe_gt + * + * The return value of this function must be immediately visible upon vCPU + * unhalt and must persist until RESFIX_DONE is issued. This guarantee is + * currently implemented only for platforms that support memirq. If non-memirq + * platforms begin to support VF migration, this function will need to be + * updated accordingly. + * + * Return: True if VF post migration recovery is pending, False otherwise + */ +bool xe_gt_sriov_vf_recovery_pending(struct xe_gt *gt) +{ + struct xe_memirq *memirq = >_to_tile(gt)->memirq; + + xe_gt_assert(gt, IS_SRIOV_VF(gt_to_xe(gt))); + + /* early detection until recovery starts */ + if (xe_device_uses_memirq(gt_to_xe(gt)) && + xe_memirq_guc_sw_int_0_irq_pending(memirq, >->uc.guc)) + return true; + + return READ_ONCE(gt->sriov.vf.migration.recovery_inprogress); +} + +static bool vf_valid_ggtt(struct xe_gt *gt) +{ + struct xe_memirq *memirq = >_to_tile(gt)->memirq; + bool irq_pending = xe_device_uses_memirq(gt_to_xe(gt)) && + xe_memirq_guc_sw_int_0_irq_pending(memirq, >->uc.guc); + + xe_gt_assert(gt, IS_SRIOV_VF(gt_to_xe(gt))); + + if (irq_pending || READ_ONCE(gt->sriov.vf.migration.ggtt_need_fixes)) + return false; + + return true; +} + +/** + * xe_gt_sriov_vf_wait_valid_ggtt() - VF wait for valid GGTT addresses + * @gt: the &xe_gt + */ +void xe_gt_sriov_vf_wait_valid_ggtt(struct xe_gt *gt) +{ + int ret; + + if (!IS_SRIOV_VF(gt_to_xe(gt)) || + !xe_sriov_vf_migration_supported(gt_to_xe(gt))) + return; + + ret = wait_event_interruptible_timeout(gt->sriov.vf.migration.wq, + vf_valid_ggtt(gt), + HZ * 5); + xe_gt_WARN_ON(gt, !ret); +} |