[Intel-gfx] [PATCH v3 09/14] drm/i915/gt: Always use MCR functions on multicast registers
Matt Roper
matthew.d.roper at intel.com
Fri Oct 14 23:02:34 UTC 2022
Rather than relying on the implicit behavior of intel_uncore_*()
functions, let's always use the intel_gt_mcr_*() functions to operate on
multicast/replicated registers.
v2:
- Add TLB invalidation registers
v3:
- Switch more uncore operations in mmio_invalidate_full() to MCR
operations for Xe_HP. (Bala)
Cc: Balasubramani Vivekanandan <balasubramani.vivekanandan at intel.com>
Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
---
drivers/gpu/drm/i915/gt/intel_gt.c | 58 ++++++++++++++++-------
drivers/gpu/drm/i915/gt/intel_mocs.c | 13 ++---
drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c | 12 +++--
drivers/gpu/drm/i915/intel_pm.c | 19 ++++----
4 files changed, 65 insertions(+), 37 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
index e14f159ad9fc..3df0d0336dbc 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt.c
@@ -1017,6 +1017,32 @@ get_reg_and_bit(const struct intel_engine_cs *engine, const bool gen8,
return rb;
}
+/*
+ * HW architecture suggest typical invalidation time at 40us,
+ * with pessimistic cases up to 100us and a recommendation to
+ * cap at 1ms. We go a bit higher just in case.
+ */
+#define TLB_INVAL_TIMEOUT_US 100
+#define TLB_INVAL_TIMEOUT_MS 4
+
+/*
+ * On Xe_HP the TLB invalidation registers are located at the same MMIO offsets
+ * but are now considered MCR registers. Since they exist within a GAM range,
+ * the primary instance of the register rolls up the status from each unit.
+ */
+static int wait_for_invalidate(struct intel_gt *gt, struct reg_and_bit rb)
+{
+ if (GRAPHICS_VER_FULL(gt->i915) >= IP_VER(12, 50))
+ return intel_gt_mcr_wait_for_reg_fw(gt, rb.reg, rb.bit, 0,
+ TLB_INVAL_TIMEOUT_US,
+ TLB_INVAL_TIMEOUT_MS);
+ else
+ return __intel_wait_for_register_fw(gt->uncore, rb.reg, rb.bit, 0,
+ TLB_INVAL_TIMEOUT_US,
+ TLB_INVAL_TIMEOUT_MS,
+ NULL);
+}
+
static void mmio_invalidate_full(struct intel_gt *gt)
{
static const i915_reg_t gen8_regs[] = {
@@ -1048,7 +1074,7 @@ static void mmio_invalidate_full(struct intel_gt *gt)
unsigned int num = 0;
if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50)) {
- regs = xehp_regs;
+ regs = NULL;
num = ARRAY_SIZE(xehp_regs);
} else if (GRAPHICS_VER(i915) == 12) {
regs = gen12_regs;
@@ -1075,11 +1101,17 @@ static void mmio_invalidate_full(struct intel_gt *gt)
if (!intel_engine_pm_is_awake(engine))
continue;
- rb = get_reg_and_bit(engine, regs == gen8_regs, regs, num);
- if (!i915_mmio_reg_offset(rb.reg))
- continue;
+ if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50)) {
+ intel_gt_mcr_multicast_write_fw(gt,
+ xehp_regs[engine->class],
+ BIT(engine->instance));
+ } else {
+ rb = get_reg_and_bit(engine, regs == gen8_regs, regs, num);
+ if (!i915_mmio_reg_offset(rb.reg))
+ continue;
- intel_uncore_write_fw(uncore, rb.reg, rb.bit);
+ intel_uncore_write_fw(uncore, rb.reg, rb.bit);
+ }
awake |= engine->mask;
}
@@ -1099,22 +1131,12 @@ static void mmio_invalidate_full(struct intel_gt *gt)
for_each_engine_masked(engine, gt, awake, tmp) {
struct reg_and_bit rb;
- /*
- * HW architecture suggest typical invalidation time at 40us,
- * with pessimistic cases up to 100us and a recommendation to
- * cap at 1ms. We go a bit higher just in case.
- */
- const unsigned int timeout_us = 100;
- const unsigned int timeout_ms = 4;
-
rb = get_reg_and_bit(engine, regs == gen8_regs, regs, num);
- if (__intel_wait_for_register_fw(uncore,
- rb.reg, rb.bit, 0,
- timeout_us, timeout_ms,
- NULL))
+
+ if (wait_for_invalidate(gt, rb))
drm_err_ratelimited(>->i915->drm,
"%s TLB invalidation did not complete in %ums!\n",
- engine->name, timeout_ms);
+ engine->name, TLB_INVAL_TIMEOUT_MS);
}
/*
diff --git a/drivers/gpu/drm/i915/gt/intel_mocs.c b/drivers/gpu/drm/i915/gt/intel_mocs.c
index ecfa5baa5e3f..49fdd509527a 100644
--- a/drivers/gpu/drm/i915/gt/intel_mocs.c
+++ b/drivers/gpu/drm/i915/gt/intel_mocs.c
@@ -7,6 +7,7 @@
#include "intel_engine.h"
#include "intel_gt.h"
+#include "intel_gt_mcr.h"
#include "intel_gt_regs.h"
#include "intel_mocs.h"
#include "intel_ring.h"
@@ -609,17 +610,17 @@ static u32 l3cc_combine(u16 low, u16 high)
0; \
i++)
-static void init_l3cc_table(struct intel_uncore *uncore,
+static void init_l3cc_table(struct intel_gt *gt,
const struct drm_i915_mocs_table *table)
{
unsigned int i;
u32 l3cc;
for_each_l3cc(l3cc, table, i)
- if (GRAPHICS_VER_FULL(uncore->i915) >= IP_VER(12, 50))
- intel_uncore_write_fw(uncore, XEHP_LNCFCMOCS(i), l3cc);
+ if (GRAPHICS_VER_FULL(gt->i915) >= IP_VER(12, 50))
+ intel_gt_mcr_multicast_write_fw(gt, XEHP_LNCFCMOCS(i), l3cc);
else
- intel_uncore_write_fw(uncore, GEN9_LNCFCMOCS(i), l3cc);
+ intel_uncore_write_fw(gt->uncore, GEN9_LNCFCMOCS(i), l3cc);
}
void intel_mocs_init_engine(struct intel_engine_cs *engine)
@@ -639,7 +640,7 @@ void intel_mocs_init_engine(struct intel_engine_cs *engine)
init_mocs_table(engine, &table);
if (flags & HAS_RENDER_L3CC && engine->class == RENDER_CLASS)
- init_l3cc_table(engine->uncore, &table);
+ init_l3cc_table(engine->gt, &table);
}
static u32 global_mocs_offset(void)
@@ -675,7 +676,7 @@ void intel_mocs_init(struct intel_gt *gt)
* memory transactions including guc transactions
*/
if (flags & HAS_RENDER_L3CC)
- init_l3cc_table(gt->uncore, &table);
+ init_l3cc_table(gt, &table);
}
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c
index 9229243992c2..5b86b2e286e0 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c
@@ -10,12 +10,15 @@
*/
#include "gt/intel_gt.h"
+#include "gt/intel_gt_mcr.h"
#include "gt/intel_gt_regs.h"
#include "intel_guc_fw.h"
#include "i915_drv.h"
-static void guc_prepare_xfer(struct intel_uncore *uncore)
+static void guc_prepare_xfer(struct intel_gt *gt)
{
+ struct intel_uncore *uncore = gt->uncore;
+
u32 shim_flags = GUC_ENABLE_READ_CACHE_LOGIC |
GUC_ENABLE_READ_CACHE_FOR_SRAM_DATA |
GUC_ENABLE_READ_CACHE_FOR_WOPCM_DATA |
@@ -35,8 +38,9 @@ static void guc_prepare_xfer(struct intel_uncore *uncore)
if (GRAPHICS_VER(uncore->i915) == 9) {
/* DOP Clock Gating Enable for GuC clocks */
- intel_uncore_rmw(uncore, GEN8_MISCCPCTL,
- 0, GEN8_DOP_CLOCK_GATE_GUC_ENABLE);
+ intel_gt_mcr_multicast_write(gt, GEN8_MISCCPCTL,
+ GEN8_DOP_CLOCK_GATE_GUC_ENABLE |
+ intel_gt_mcr_read_any(gt, GEN8_MISCCPCTL));
/* allows for 5us (in 10ns units) before GT can go to RC6 */
intel_uncore_write(uncore, GUC_ARAT_C6DIS, 0x1FF);
@@ -168,7 +172,7 @@ int intel_guc_fw_upload(struct intel_guc *guc)
struct intel_uncore *uncore = gt->uncore;
int ret;
- guc_prepare_xfer(uncore);
+ guc_prepare_xfer(gt);
/*
* Note that GuC needs the CSS header plus uKernel code to be copied
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 390802245514..cb18e45f6adf 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -30,6 +30,8 @@
#include "display/skl_watermark.h"
#include "gt/intel_engine_regs.h"
+#include "gt/intel_gt.h"
+#include "gt/intel_gt_mcr.h"
#include "gt/intel_gt_regs.h"
#include "i915_drv.h"
@@ -4321,22 +4323,22 @@ static void gen8_set_l3sqc_credits(struct drm_i915_private *dev_priv,
u32 val;
/* WaTempDisableDOPClkGating:bdw */
- misccpctl = intel_uncore_rmw(&dev_priv->uncore, GEN8_MISCCPCTL, ~GEN8_DOP_CLOCK_GATE_ENABLE,
- 0);
+ misccpctl = intel_gt_mcr_multicast_rmw(to_gt(dev_priv), GEN8_MISCCPCTL,
+ ~GEN8_DOP_CLOCK_GATE_ENABLE, 0);
- val = intel_uncore_read(&dev_priv->uncore, GEN8_L3SQCREG1);
+ val = intel_gt_mcr_read_any(to_gt(dev_priv), GEN8_L3SQCREG1);
val &= ~L3_PRIO_CREDITS_MASK;
val |= L3_GENERAL_PRIO_CREDITS(general_prio_credits);
val |= L3_HIGH_PRIO_CREDITS(high_prio_credits);
- intel_uncore_write(&dev_priv->uncore, GEN8_L3SQCREG1, val);
+ intel_gt_mcr_multicast_write(to_gt(dev_priv), GEN8_L3SQCREG1, val);
/*
* Wait at least 100 clocks before re-enabling clock gating.
* See the definition of L3SQCREG1 in BSpec.
*/
- intel_uncore_posting_read(&dev_priv->uncore, GEN8_L3SQCREG1);
+ intel_gt_mcr_read_any(to_gt(dev_priv), GEN8_L3SQCREG1);
udelay(1);
- intel_uncore_write(&dev_priv->uncore, GEN8_MISCCPCTL, misccpctl);
+ intel_gt_mcr_multicast_write(to_gt(dev_priv), GEN8_MISCCPCTL, misccpctl);
}
static void icl_init_clock_gating(struct drm_i915_private *dev_priv)
@@ -4496,9 +4498,8 @@ static void skl_init_clock_gating(struct drm_i915_private *dev_priv)
gen9_init_clock_gating(dev_priv);
/* WaDisableDopClockGating:skl */
- intel_uncore_write(&dev_priv->uncore, GEN8_MISCCPCTL,
- intel_uncore_read(&dev_priv->uncore, GEN8_MISCCPCTL) &
- ~GEN8_DOP_CLOCK_GATE_ENABLE);
+ intel_gt_mcr_multicast_rmw(to_gt(dev_priv), GEN8_MISCCPCTL,
+ GEN8_DOP_CLOCK_GATE_ENABLE, 0);
/* WAC6entrylatency:skl */
intel_uncore_write(&dev_priv->uncore, FBC_LLC_READ_CTRL, intel_uncore_read(&dev_priv->uncore, FBC_LLC_READ_CTRL) |
--
2.37.3
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