#include "xe_hw_fence.h"
#include "xe_map.h"
#include "xe_memirq.h"
+#include "xe_mmio.h"
#include "xe_sriov.h"
#include "xe_trace_lrc.h"
#include "xe_vm.h"
#define LRC_START_SEQNO_PPHWSP_OFFSET (LRC_SEQNO_PPHWSP_OFFSET + 8)
#define LRC_CTX_JOB_TIMESTAMP_OFFSET (LRC_START_SEQNO_PPHWSP_OFFSET + 8)
#define LRC_PARALLEL_PPHWSP_OFFSET 2048
+#define LRC_ENGINE_ID_PPHWSP_OFFSET 2096
u32 xe_lrc_regs_offset(struct xe_lrc *lrc)
{
return xe_lrc_pphwsp_offset(lrc) + LRC_PARALLEL_PPHWSP_OFFSET;
}
+static inline u32 __xe_lrc_engine_id_offset(struct xe_lrc *lrc)
+{
+ return xe_lrc_pphwsp_offset(lrc) + LRC_ENGINE_ID_PPHWSP_OFFSET;
+}
+
static u32 __xe_lrc_ctx_timestamp_offset(struct xe_lrc *lrc)
{
return __xe_lrc_regs_offset(lrc) + CTX_TIMESTAMP * sizeof(u32);
}
+static u32 __xe_lrc_ctx_timestamp_udw_offset(struct xe_lrc *lrc)
+{
+ return __xe_lrc_regs_offset(lrc) + CTX_TIMESTAMP_UDW * sizeof(u32);
+}
+
static inline u32 __xe_lrc_indirect_ring_offset(struct xe_lrc *lrc)
{
/* Indirect ring state page is at the very end of LRC */
DECL_MAP_ADDR_HELPERS(start_seqno)
DECL_MAP_ADDR_HELPERS(ctx_job_timestamp)
DECL_MAP_ADDR_HELPERS(ctx_timestamp)
+DECL_MAP_ADDR_HELPERS(ctx_timestamp_udw)
DECL_MAP_ADDR_HELPERS(parallel)
DECL_MAP_ADDR_HELPERS(indirect_ring)
+DECL_MAP_ADDR_HELPERS(engine_id)
#undef DECL_MAP_ADDR_HELPERS
return __xe_lrc_ctx_timestamp_ggtt_addr(lrc);
}
+/**
+ * xe_lrc_ctx_timestamp_udw_ggtt_addr() - Get ctx timestamp udw GGTT address
+ * @lrc: Pointer to the lrc.
+ *
+ * Returns: ctx timestamp udw GGTT address
+ */
+u32 xe_lrc_ctx_timestamp_udw_ggtt_addr(struct xe_lrc *lrc)
+{
+ return __xe_lrc_ctx_timestamp_udw_ggtt_addr(lrc);
+}
+
/**
* xe_lrc_ctx_timestamp() - Read ctx timestamp value
* @lrc: Pointer to the lrc.
*
* Returns: ctx timestamp value
*/
-u32 xe_lrc_ctx_timestamp(struct xe_lrc *lrc)
+u64 xe_lrc_ctx_timestamp(struct xe_lrc *lrc)
{
struct xe_device *xe = lrc_to_xe(lrc);
struct iosys_map map;
+ u32 ldw, udw = 0;
map = __xe_lrc_ctx_timestamp_map(lrc);
- return xe_map_read32(xe, &map);
+ ldw = xe_map_read32(xe, &map);
+
+ if (xe->info.has_64bit_timestamp) {
+ map = __xe_lrc_ctx_timestamp_udw_map(lrc);
+ udw = xe_map_read32(xe, &map);
+ }
+
+ return (u64)udw << 32 | ldw;
}
/**
xe_bo_unpin(lrc->bo);
xe_bo_unlock(lrc->bo);
xe_bo_put(lrc->bo);
+ xe_bo_unpin_map_no_vm(lrc->bb_per_ctx_bo);
+}
+
+/*
+ * xe_lrc_setup_utilization() - Setup wa bb to assist in calculating active
+ * context run ticks.
+ * @lrc: Pointer to the lrc.
+ *
+ * Context Timestamp (CTX_TIMESTAMP) in the LRC accumulates the run ticks of the
+ * context, but only gets updated when the context switches out. In order to
+ * check how long a context has been active before it switches out, two things
+ * are required:
+ *
+ * (1) Determine if the context is running:
+ * To do so, we program the WA BB to set an initial value for CTX_TIMESTAMP in
+ * the LRC. The value chosen is 1 since 0 is the initial value when the LRC is
+ * initialized. During a query, we just check for this value to determine if the
+ * context is active. If the context switched out, it would overwrite this
+ * location with the actual CTX_TIMESTAMP MMIO value. Note that WA BB runs as
+ * the last part of context restore, so reusing this LRC location will not
+ * clobber anything.
+ *
+ * (2) Calculate the time that the context has been active for:
+ * The CTX_TIMESTAMP ticks only when the context is active. If a context is
+ * active, we just use the CTX_TIMESTAMP MMIO as the new value of utilization.
+ * While doing so, we need to read the CTX_TIMESTAMP MMIO for the specific
+ * engine instance. Since we do not know which instance the context is running
+ * on until it is scheduled, we also read the ENGINE_ID MMIO in the WA BB and
+ * store it in the PPHSWP.
+ */
+#define CONTEXT_ACTIVE 1ULL
+static void xe_lrc_setup_utilization(struct xe_lrc *lrc)
+{
+ u32 *cmd;
+
+ cmd = lrc->bb_per_ctx_bo->vmap.vaddr;
+
+ *cmd++ = MI_STORE_REGISTER_MEM | MI_SRM_USE_GGTT | MI_SRM_ADD_CS_OFFSET;
+ *cmd++ = ENGINE_ID(0).addr;
+ *cmd++ = __xe_lrc_engine_id_ggtt_addr(lrc);
+ *cmd++ = 0;
+
+ *cmd++ = MI_STORE_DATA_IMM | MI_SDI_GGTT | MI_SDI_NUM_DW(1);
+ *cmd++ = __xe_lrc_ctx_timestamp_ggtt_addr(lrc);
+ *cmd++ = 0;
+ *cmd++ = lower_32_bits(CONTEXT_ACTIVE);
+
+ if (lrc_to_xe(lrc)->info.has_64bit_timestamp) {
+ *cmd++ = MI_STORE_DATA_IMM | MI_SDI_GGTT | MI_SDI_NUM_DW(1);
+ *cmd++ = __xe_lrc_ctx_timestamp_udw_ggtt_addr(lrc);
+ *cmd++ = 0;
+ *cmd++ = upper_32_bits(CONTEXT_ACTIVE);
+ }
+
+ *cmd++ = MI_BATCH_BUFFER_END;
+
+ xe_lrc_write_ctx_reg(lrc, CTX_BB_PER_CTX_PTR,
+ xe_bo_ggtt_addr(lrc->bb_per_ctx_bo) | 1);
+
}
#define PVC_CTX_ASID (0x2e + 1)
if (IS_ERR(lrc->bo))
return PTR_ERR(lrc->bo);
+ lrc->bb_per_ctx_bo = xe_bo_create_pin_map(xe, tile, NULL, SZ_4K,
+ ttm_bo_type_kernel,
+ bo_flags);
+ if (IS_ERR(lrc->bb_per_ctx_bo)) {
+ err = PTR_ERR(lrc->bb_per_ctx_bo);
+ goto err_lrc_finish;
+ }
+
lrc->size = lrc_size;
lrc->ring.size = ring_size;
lrc->ring.tail = 0;
- lrc->ctx_timestamp = 0;
xe_hw_fence_ctx_init(&lrc->fence_ctx, hwe->gt,
hwe->fence_irq, hwe->name);
xe_lrc_read_ctx_reg(lrc, CTX_CONTEXT_CONTROL) |
_MASKED_BIT_ENABLE(CTX_CTRL_PXP_ENABLE));
+ lrc->ctx_timestamp = 0;
xe_lrc_write_ctx_reg(lrc, CTX_TIMESTAMP, 0);
+ if (lrc_to_xe(lrc)->info.has_64bit_timestamp)
+ xe_lrc_write_ctx_reg(lrc, CTX_TIMESTAMP_UDW, 0);
if (xe->info.has_asid && vm)
xe_lrc_write_ctx_reg(lrc, PVC_CTX_ASID, vm->usm.asid);
map = __xe_lrc_start_seqno_map(lrc);
xe_map_write32(lrc_to_xe(lrc), &map, lrc->fence_ctx.next_seqno - 1);
+ xe_lrc_setup_utilization(lrc);
+
return 0;
err_lrc_finish:
return __xe_lrc_parallel_map(lrc);
}
+/**
+ * xe_lrc_engine_id() - Read engine id value
+ * @lrc: Pointer to the lrc.
+ *
+ * Returns: context id value
+ */
+static u32 xe_lrc_engine_id(struct xe_lrc *lrc)
+{
+ struct xe_device *xe = lrc_to_xe(lrc);
+ struct iosys_map map;
+
+ map = __xe_lrc_engine_id_map(lrc);
+ return xe_map_read32(xe, &map);
+}
+
static int instr_dw(u32 cmd_header)
{
/* GFXPIPE "SINGLE_DW" opcodes are a single dword */
snapshot->lrc_offset = xe_lrc_pphwsp_offset(lrc);
snapshot->lrc_size = lrc->bo->size - snapshot->lrc_offset;
snapshot->lrc_snapshot = NULL;
- snapshot->ctx_timestamp = xe_lrc_ctx_timestamp(lrc);
+ snapshot->ctx_timestamp = lower_32_bits(xe_lrc_ctx_timestamp(lrc));
snapshot->ctx_job_timestamp = xe_lrc_ctx_job_timestamp(lrc);
return snapshot;
}
kfree(snapshot);
}
+static int get_ctx_timestamp(struct xe_lrc *lrc, u32 engine_id, u64 *reg_ctx_ts)
+{
+ u16 class = REG_FIELD_GET(ENGINE_CLASS_ID, engine_id);
+ u16 instance = REG_FIELD_GET(ENGINE_INSTANCE_ID, engine_id);
+ struct xe_hw_engine *hwe;
+ u64 val;
+
+ hwe = xe_gt_hw_engine(lrc->gt, class, instance, false);
+ if (xe_gt_WARN_ONCE(lrc->gt, !hwe || xe_hw_engine_is_reserved(hwe),
+ "Unexpected engine class:instance %d:%d for context utilization\n",
+ class, instance))
+ return -1;
+
+ if (lrc_to_xe(lrc)->info.has_64bit_timestamp)
+ val = xe_mmio_read64_2x32(&hwe->gt->mmio,
+ RING_CTX_TIMESTAMP(hwe->mmio_base));
+ else
+ val = xe_mmio_read32(&hwe->gt->mmio,
+ RING_CTX_TIMESTAMP(hwe->mmio_base));
+
+ *reg_ctx_ts = val;
+
+ return 0;
+}
+
/**
* xe_lrc_update_timestamp() - Update ctx timestamp
* @lrc: Pointer to the lrc.
* @old_ts: Old timestamp value
*
* Populate @old_ts current saved ctx timestamp, read new ctx timestamp and
- * update saved value.
+ * update saved value. With support for active contexts, the calculation may be
+ * slightly racy, so follow a read-again logic to ensure that the context is
+ * still active before returning the right timestamp.
*
* Returns: New ctx timestamp value
*/
-u32 xe_lrc_update_timestamp(struct xe_lrc *lrc, u32 *old_ts)
+u64 xe_lrc_update_timestamp(struct xe_lrc *lrc, u64 *old_ts)
{
+ u64 lrc_ts, reg_ts;
+ u32 engine_id;
+
*old_ts = lrc->ctx_timestamp;
- lrc->ctx_timestamp = xe_lrc_ctx_timestamp(lrc);
+ lrc_ts = xe_lrc_ctx_timestamp(lrc);
+ /* CTX_TIMESTAMP mmio read is invalid on VF, so return the LRC value */
+ if (IS_SRIOV_VF(lrc_to_xe(lrc))) {
+ lrc->ctx_timestamp = lrc_ts;
+ goto done;
+ }
+
+ if (lrc_ts == CONTEXT_ACTIVE) {
+ engine_id = xe_lrc_engine_id(lrc);
+ if (!get_ctx_timestamp(lrc, engine_id, ®_ts))
+ lrc->ctx_timestamp = reg_ts;
+
+ /* read lrc again to ensure context is still active */
+ lrc_ts = xe_lrc_ctx_timestamp(lrc);
+ }
+
+ /*
+ * If context switched out, just use the lrc_ts. Note that this needs to
+ * be a separate if condition.
+ */
+ if (lrc_ts != CONTEXT_ACTIVE)
+ lrc->ctx_timestamp = lrc_ts;
+done:
trace_xe_lrc_update_timestamp(lrc, *old_ts);
return lrc->ctx_timestamp;
projects / thirdparty / kernel / linux.git / commitdiff
