kvj
/
linux-zen-desktop
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
linux-zen-desktop/drivers/gpu/drm/i915/gt/intel_mocs.c

688 lines
19 KiB
C
Raw Normal View History

Initial commit
2023-08-30 17:31:07 +02:00
// SPDX-License-Identifier: MIT
/*
* Copyright © 2015 Intel Corporation
*/
#include "i915_drv.h"
#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"
/* structures required */
struct drm_i915_mocs_entry {
u32 control_value;
u16 l3cc_value;
u16 used;
};
struct drm_i915_mocs_table {
unsigned int size;
unsigned int n_entries;
const struct drm_i915_mocs_entry *table;
u8 uc_index;
u8 wb_index; /* Only used on HAS_L3_CCS_READ() platforms */
u8 unused_entries_index;
};
/* Defines for the tables (XXX_MOCS_0 - XXX_MOCS_63) */
#define _LE_CACHEABILITY(value) ((value) << 0)
#define _LE_TGT_CACHE(value) ((value) << 2)
#define LE_LRUM(value) ((value) << 4)
#define LE_AOM(value) ((value) << 6)
#define LE_RSC(value) ((value) << 7)
#define LE_SCC(value) ((value) << 8)
#define LE_PFM(value) ((value) << 11)
#define LE_SCF(value) ((value) << 14)
#define LE_COS(value) ((value) << 15)
#define LE_SSE(value) ((value) << 17)
/* Defines for the tables (LNCFMOCS0 - LNCFMOCS31) - two entries per word */
#define L3_ESC(value) ((value) << 0)
#define L3_SCC(value) ((value) << 1)
#define _L3_CACHEABILITY(value) ((value) << 4)
#define L3_GLBGO(value) ((value) << 6)
#define L3_LKUP(value) ((value) << 7)
/* Helper defines */
#define GEN9_NUM_MOCS_ENTRIES 64 /* 63-64 are reserved, but configured. */
#define PVC_NUM_MOCS_ENTRIES 3
/* (e)LLC caching options */
/*
* Note: LE_0_PAGETABLE works only up to Gen11; for newer gens it means
* the same as LE_UC
*/
#define LE_0_PAGETABLE _LE_CACHEABILITY(0)
#define LE_1_UC _LE_CACHEABILITY(1)
#define LE_2_WT _LE_CACHEABILITY(2)
#define LE_3_WB _LE_CACHEABILITY(3)
/* Target cache */
#define LE_TC_0_PAGETABLE _LE_TGT_CACHE(0)
#define LE_TC_1_LLC _LE_TGT_CACHE(1)
#define LE_TC_2_LLC_ELLC _LE_TGT_CACHE(2)
#define LE_TC_3_LLC_ELLC_ALT _LE_TGT_CACHE(3)
/* L3 caching options */
#define L3_0_DIRECT _L3_CACHEABILITY(0)
#define L3_1_UC _L3_CACHEABILITY(1)
#define L3_2_RESERVED _L3_CACHEABILITY(2)
#define L3_3_WB _L3_CACHEABILITY(3)
#define MOCS_ENTRY(__idx, __control_value, __l3cc_value) \
[__idx] = { \
.control_value = __control_value, \
.l3cc_value = __l3cc_value, \
.used = 1, \
}
/*
* MOCS tables
*
* These are the MOCS tables that are programmed across all the rings.
* The control value is programmed to all the rings that support the
* MOCS registers. While the l3cc_values are only programmed to the
* LNCFCMOCS0 - LNCFCMOCS32 registers.
*
* These tables are intended to be kept reasonably consistent across
* HW platforms, and for ICL+, be identical across OSes. To achieve
* that, for Icelake and above, list of entries is published as part
* of bspec.
*
* Entries not part of the following tables are undefined as far as
* userspace is concerned and shouldn't be relied upon. For Gen < 12
* they will be initialized to PTE. Gen >= 12 don't have a setting for
* PTE and those platforms except TGL/RKL will be initialized L3 WB to
* catch accidental use of reserved and unused mocs indexes.
*
* The last few entries are reserved by the hardware. For ICL+ they
* should be initialized according to bspec and never used, for older
* platforms they should never be written to.
*
* NOTE1: These tables are part of bspec and defined as part of hardware
* interface for ICL+. For older platforms, they are part of kernel
* ABI. It is expected that, for specific hardware platform, existing
* entries will remain constant and the table will only be updated by
* adding new entries, filling unused positions.
*
* NOTE2: For GEN >= 12 except TGL and RKL, reserved and unspecified MOCS
* indices have been set to L3 WB. These reserved entries should never
* be used, they may be changed to low performant variants with better
* coherency in the future if more entries are needed.
* For TGL/RKL, all the unspecified MOCS indexes are mapped to L3 UC.
*/
#define GEN9_MOCS_ENTRIES \
MOCS_ENTRY(I915_MOCS_UNCACHED, \
LE_1_UC | LE_TC_2_LLC_ELLC, \
L3_1_UC), \
MOCS_ENTRY(I915_MOCS_PTE, \
LE_0_PAGETABLE | LE_TC_0_PAGETABLE | LE_LRUM(3), \
L3_3_WB)
static const struct drm_i915_mocs_entry skl_mocs_table[] = {
GEN9_MOCS_ENTRIES,
MOCS_ENTRY(I915_MOCS_CACHED,
LE_3_WB | LE_TC_2_LLC_ELLC | LE_LRUM(3),
L3_3_WB),
/*
* mocs:63
* - used by the L3 for all of its evictions.
* Thus it is expected to allow LLC cacheability to enable coherent
* flows to be maintained.
* - used to force L3 uncachable cycles.
* Thus it is expected to make the surface L3 uncacheable.
*/
MOCS_ENTRY(63,
LE_3_WB | LE_TC_1_LLC | LE_LRUM(3),
L3_1_UC)
};
/* NOTE: the LE_TGT_CACHE is not used on Broxton */
static const struct drm_i915_mocs_entry broxton_mocs_table[] = {
GEN9_MOCS_ENTRIES,
MOCS_ENTRY(I915_MOCS_CACHED,
LE_1_UC | LE_TC_2_LLC_ELLC | LE_LRUM(3),
L3_3_WB)
};
#define GEN11_MOCS_ENTRIES \
/* Entries 0 and 1 are defined per-platform */ \
/* Base - L3 + LLC */ \
MOCS_ENTRY(2, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), \
L3_3_WB), \
/* Base - Uncached */ \
MOCS_ENTRY(3, \
LE_1_UC | LE_TC_1_LLC, \
L3_1_UC), \
/* Base - L3 */ \
MOCS_ENTRY(4, \
LE_1_UC | LE_TC_1_LLC, \
L3_3_WB), \
/* Base - LLC */ \
MOCS_ENTRY(5, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), \
L3_1_UC), \
/* Age 0 - LLC */ \
MOCS_ENTRY(6, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(1), \
L3_1_UC), \
/* Age 0 - L3 + LLC */ \
MOCS_ENTRY(7, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(1), \
L3_3_WB), \
/* Age: Don't Chg. - LLC */ \
MOCS_ENTRY(8, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(2), \
L3_1_UC), \
/* Age: Don't Chg. - L3 + LLC */ \
MOCS_ENTRY(9, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(2), \
L3_3_WB), \
/* No AOM - LLC */ \
MOCS_ENTRY(10, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_AOM(1), \
L3_1_UC), \
/* No AOM - L3 + LLC */ \
MOCS_ENTRY(11, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_AOM(1), \
L3_3_WB), \
/* No AOM; Age 0 - LLC */ \
MOCS_ENTRY(12, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(1) | LE_AOM(1), \
L3_1_UC), \
/* No AOM; Age 0 - L3 + LLC */ \
MOCS_ENTRY(13, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(1) | LE_AOM(1), \
L3_3_WB), \
/* No AOM; Age:DC - LLC */ \
MOCS_ENTRY(14, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(2) | LE_AOM(1), \
L3_1_UC), \
/* No AOM; Age:DC - L3 + LLC */ \
MOCS_ENTRY(15, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(2) | LE_AOM(1), \
L3_3_WB), \
/* Bypass LLC - Uncached (EHL+) */ \
MOCS_ENTRY(16, \
LE_1_UC | LE_TC_1_LLC | LE_SCF(1), \
L3_1_UC), \
/* Bypass LLC - L3 (Read-Only) (EHL+) */ \
MOCS_ENTRY(17, \
LE_1_UC | LE_TC_1_LLC | LE_SCF(1), \
L3_3_WB), \
/* Self-Snoop - L3 + LLC */ \
MOCS_ENTRY(18, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_SSE(3), \
L3_3_WB), \
/* Skip Caching - L3 + LLC(12.5%) */ \
MOCS_ENTRY(19, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_SCC(7), \
L3_3_WB), \
/* Skip Caching - L3 + LLC(25%) */ \
MOCS_ENTRY(20, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_SCC(3), \
L3_3_WB), \
/* Skip Caching - L3 + LLC(50%) */ \
MOCS_ENTRY(21, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_SCC(1), \
L3_3_WB), \
/* Skip Caching - L3 + LLC(75%) */ \
MOCS_ENTRY(22, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_RSC(1) | LE_SCC(3), \
L3_3_WB), \
/* Skip Caching - L3 + LLC(87.5%) */ \
MOCS_ENTRY(23, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_RSC(1) | LE_SCC(7), \
L3_3_WB), \
/* HW Reserved - SW program but never use */ \
MOCS_ENTRY(62, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), \
L3_1_UC), \
/* HW Reserved - SW program but never use */ \
MOCS_ENTRY(63, \
LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), \
L3_1_UC)
static const struct drm_i915_mocs_entry tgl_mocs_table[] = {
/*
* NOTE:
* Reserved and unspecified MOCS indices have been set to (L3 + LCC).
* These reserved entries should never be used, they may be changed
* to low performant variants with better coherency in the future if
* more entries are needed. We are programming index I915_MOCS_PTE(1)
* only, __init_mocs_table() take care to program unused index with
* this entry.
*/
MOCS_ENTRY(I915_MOCS_PTE,
LE_0_PAGETABLE | LE_TC_0_PAGETABLE,
L3_1_UC),
GEN11_MOCS_ENTRIES,
/* Implicitly enable L1 - HDC:L1 + L3 + LLC */
MOCS_ENTRY(48,
LE_3_WB | LE_TC_1_LLC | LE_LRUM(3),
L3_3_WB),
/* Implicitly enable L1 - HDC:L1 + L3 */
MOCS_ENTRY(49,
LE_1_UC | LE_TC_1_LLC,
L3_3_WB),
/* Implicitly enable L1 - HDC:L1 + LLC */
MOCS_ENTRY(50,
LE_3_WB | LE_TC_1_LLC | LE_LRUM(3),
L3_1_UC),
/* Implicitly enable L1 - HDC:L1 */
MOCS_ENTRY(51,
LE_1_UC | LE_TC_1_LLC,
L3_1_UC),
/* HW Special Case (CCS) */
MOCS_ENTRY(60,
LE_3_WB | LE_TC_1_LLC | LE_LRUM(3),
L3_1_UC),
/* HW Special Case (Displayable) */
MOCS_ENTRY(61,
LE_1_UC | LE_TC_1_LLC,
L3_3_WB),
};
static const struct drm_i915_mocs_entry icl_mocs_table[] = {
/* Base - Uncached (Deprecated) */
MOCS_ENTRY(I915_MOCS_UNCACHED,
LE_1_UC | LE_TC_1_LLC,
L3_1_UC),
/* Base - L3 + LeCC:PAT (Deprecated) */
MOCS_ENTRY(I915_MOCS_PTE,
LE_0_PAGETABLE | LE_TC_0_PAGETABLE,
L3_3_WB),
GEN11_MOCS_ENTRIES
};
static const struct drm_i915_mocs_entry dg1_mocs_table[] = {
/* UC */
MOCS_ENTRY(1, 0, L3_1_UC),
/* WB - L3 */
MOCS_ENTRY(5, 0, L3_3_WB),
/* WB - L3 50% */
MOCS_ENTRY(6, 0, L3_ESC(1) | L3_SCC(1) | L3_3_WB),
/* WB - L3 25% */
MOCS_ENTRY(7, 0, L3_ESC(1) | L3_SCC(3) | L3_3_WB),
/* WB - L3 12.5% */
MOCS_ENTRY(8, 0, L3_ESC(1) | L3_SCC(7) | L3_3_WB),
/* HDC:L1 + L3 */
MOCS_ENTRY(48, 0, L3_3_WB),
/* HDC:L1 */
MOCS_ENTRY(49, 0, L3_1_UC),
/* HW Reserved */
MOCS_ENTRY(60, 0, L3_1_UC),
MOCS_ENTRY(61, 0, L3_1_UC),
MOCS_ENTRY(62, 0, L3_1_UC),
MOCS_ENTRY(63, 0, L3_1_UC),
};
static const struct drm_i915_mocs_entry gen12_mocs_table[] = {
GEN11_MOCS_ENTRIES,
/* Implicitly enable L1 - HDC:L1 + L3 + LLC */
MOCS_ENTRY(48,
LE_3_WB | LE_TC_1_LLC | LE_LRUM(3),
L3_3_WB),
/* Implicitly enable L1 - HDC:L1 + L3 */
MOCS_ENTRY(49,
LE_1_UC | LE_TC_1_LLC,
L3_3_WB),
/* Implicitly enable L1 - HDC:L1 + LLC */
MOCS_ENTRY(50,
LE_3_WB | LE_TC_1_LLC | LE_LRUM(3),
L3_1_UC),
/* Implicitly enable L1 - HDC:L1 */
MOCS_ENTRY(51,
LE_1_UC | LE_TC_1_LLC,
L3_1_UC),
/* HW Special Case (CCS) */
MOCS_ENTRY(60,
LE_3_WB | LE_TC_1_LLC | LE_LRUM(3),
L3_1_UC),
/* HW Special Case (Displayable) */
MOCS_ENTRY(61,
LE_1_UC | LE_TC_1_LLC,
L3_3_WB),
};
static const struct drm_i915_mocs_entry xehpsdv_mocs_table[] = {
/* wa_1608975824 */
MOCS_ENTRY(0, 0, L3_3_WB | L3_LKUP(1)),
/* UC - Coherent; GO:L3 */
MOCS_ENTRY(1, 0, L3_1_UC | L3_LKUP(1)),
/* UC - Coherent; GO:Memory */
MOCS_ENTRY(2, 0, L3_1_UC | L3_GLBGO(1) | L3_LKUP(1)),
/* UC - Non-Coherent; GO:Memory */
MOCS_ENTRY(3, 0, L3_1_UC | L3_GLBGO(1)),
/* UC - Non-Coherent; GO:L3 */
MOCS_ENTRY(4, 0, L3_1_UC),
/* WB */
MOCS_ENTRY(5, 0, L3_3_WB | L3_LKUP(1)),
/* HW Reserved - SW program but never use. */
MOCS_ENTRY(48, 0, L3_3_WB | L3_LKUP(1)),
MOCS_ENTRY(49, 0, L3_1_UC | L3_LKUP(1)),
MOCS_ENTRY(60, 0, L3_1_UC),
MOCS_ENTRY(61, 0, L3_1_UC),
MOCS_ENTRY(62, 0, L3_1_UC),
MOCS_ENTRY(63, 0, L3_1_UC),
};
static const struct drm_i915_mocs_entry dg2_mocs_table[] = {
/* UC - Coherent; GO:L3 */
MOCS_ENTRY(0, 0, L3_1_UC | L3_LKUP(1)),
/* UC - Coherent; GO:Memory */
MOCS_ENTRY(1, 0, L3_1_UC | L3_GLBGO(1) | L3_LKUP(1)),
/* UC - Non-Coherent; GO:Memory */
MOCS_ENTRY(2, 0, L3_1_UC | L3_GLBGO(1)),
/* WB - LC */
MOCS_ENTRY(3, 0, L3_3_WB | L3_LKUP(1)),
};
static const struct drm_i915_mocs_entry dg2_mocs_table_g10_ax[] = {
/* Wa_14011441408: Set Go to Memory for MOCS#0 */
MOCS_ENTRY(0, 0, L3_1_UC | L3_GLBGO(1) | L3_LKUP(1)),
/* UC - Coherent; GO:Memory */
MOCS_ENTRY(1, 0, L3_1_UC | L3_GLBGO(1) | L3_LKUP(1)),
/* UC - Non-Coherent; GO:Memory */
MOCS_ENTRY(2, 0, L3_1_UC | L3_GLBGO(1)),
/* WB - LC */
MOCS_ENTRY(3, 0, L3_3_WB | L3_LKUP(1)),
};
static const struct drm_i915_mocs_entry pvc_mocs_table[] = {
/* Error */
MOCS_ENTRY(0, 0, L3_3_WB),
/* UC */
MOCS_ENTRY(1, 0, L3_1_UC),
/* WB */
MOCS_ENTRY(2, 0, L3_3_WB),
};
enum {
HAS_GLOBAL_MOCS = BIT(0),
HAS_ENGINE_MOCS = BIT(1),
HAS_RENDER_L3CC = BIT(2),
};
static bool has_l3cc(const struct drm_i915_private *i915)
{
return true;
}
static bool has_global_mocs(const struct drm_i915_private *i915)
{
return HAS_GLOBAL_MOCS_REGISTERS(i915);
}
static bool has_mocs(const struct drm_i915_private *i915)
{
return !IS_DGFX(i915);
}
static unsigned int get_mocs_settings(const struct drm_i915_private *i915,
struct drm_i915_mocs_table *table)
{
unsigned int flags;
memset(table, 0, sizeof(struct drm_i915_mocs_table));
table->unused_entries_index = I915_MOCS_PTE;
if (IS_PONTEVECCHIO(i915)) {
table->size = ARRAY_SIZE(pvc_mocs_table);
table->table = pvc_mocs_table;
table->n_entries = PVC_NUM_MOCS_ENTRIES;
table->uc_index = 1;
table->wb_index = 2;
table->unused_entries_index = 2;
} else if (IS_DG2(i915)) {
if (IS_DG2_GRAPHICS_STEP(i915, G10, STEP_A0, STEP_B0)) {
table->size = ARRAY_SIZE(dg2_mocs_table_g10_ax);
table->table = dg2_mocs_table_g10_ax;
} else {
table->size = ARRAY_SIZE(dg2_mocs_table);
table->table = dg2_mocs_table;
}
table->uc_index = 1;
table->n_entries = GEN9_NUM_MOCS_ENTRIES;
table->unused_entries_index = 3;
} else if (IS_XEHPSDV(i915)) {
table->size = ARRAY_SIZE(xehpsdv_mocs_table);
table->table = xehpsdv_mocs_table;
table->uc_index = 2;
table->n_entries = GEN9_NUM_MOCS_ENTRIES;
table->unused_entries_index = 5;
} else if (IS_DG1(i915)) {
table->size = ARRAY_SIZE(dg1_mocs_table);
table->table = dg1_mocs_table;
table->uc_index = 1;
table->n_entries = GEN9_NUM_MOCS_ENTRIES;
table->uc_index = 1;
table->unused_entries_index = 5;
} else if (IS_TIGERLAKE(i915) || IS_ROCKETLAKE(i915)) {
/* For TGL/RKL, Can't be changed now for ABI reasons */
table->size = ARRAY_SIZE(tgl_mocs_table);
table->table = tgl_mocs_table;
table->n_entries = GEN9_NUM_MOCS_ENTRIES;
table->uc_index = 3;
} else if (GRAPHICS_VER(i915) >= 12) {
table->size = ARRAY_SIZE(gen12_mocs_table);
table->table = gen12_mocs_table;
table->n_entries = GEN9_NUM_MOCS_ENTRIES;
table->uc_index = 3;
table->unused_entries_index = 2;
} else if (GRAPHICS_VER(i915) == 11) {
table->size = ARRAY_SIZE(icl_mocs_table);
table->table = icl_mocs_table;
table->n_entries = GEN9_NUM_MOCS_ENTRIES;
} else if (IS_GEN9_BC(i915)) {
table->size = ARRAY_SIZE(skl_mocs_table);
table->n_entries = GEN9_NUM_MOCS_ENTRIES;
table->table = skl_mocs_table;
} else if (IS_GEN9_LP(i915)) {
table->size = ARRAY_SIZE(broxton_mocs_table);
table->n_entries = GEN9_NUM_MOCS_ENTRIES;
table->table = broxton_mocs_table;
} else {
drm_WARN_ONCE(&i915->drm, GRAPHICS_VER(i915) >= 9,
"Platform that should have a MOCS table does not.\n");
return 0;
}
if (GEM_DEBUG_WARN_ON(table->size > table->n_entries))
return 0;
/* WaDisableSkipCaching:skl,bxt,kbl,glk */
if (GRAPHICS_VER(i915) == 9) {
int i;
for (i = 0; i < table->size; i++)
if (GEM_DEBUG_WARN_ON(table->table[i].l3cc_value &
(L3_ESC(1) | L3_SCC(0x7))))
return 0;
}
flags = 0;
if (has_mocs(i915)) {
if (has_global_mocs(i915))
flags |= HAS_GLOBAL_MOCS;
else
flags |= HAS_ENGINE_MOCS;
}
if (has_l3cc(i915))
flags |= HAS_RENDER_L3CC;
return flags;
}
/*
* Get control_value from MOCS entry taking into account when it's not used
* then if unused_entries_index is non-zero then its value will be returned
* otherwise I915_MOCS_PTE's value is returned in this case.
*/
static u32 get_entry_control(const struct drm_i915_mocs_table *table,
unsigned int index)
{
if (index < table->size && table->table[index].used)
return table->table[index].control_value;
return table->table[table->unused_entries_index].control_value;
}
#define for_each_mocs(mocs, t, i) \
for (i = 0; \
i < (t)->n_entries ? (mocs = get_entry_control((t), i)), 1 : 0;\
i++)
static void __init_mocs_table(struct intel_uncore *uncore,
const struct drm_i915_mocs_table *table,
u32 addr)
{
unsigned int i;
u32 mocs;
drm_WARN_ONCE(&uncore->i915->drm, !table->unused_entries_index,
"Unused entries index should have been defined\n");
for_each_mocs(mocs, table, i)
intel_uncore_write_fw(uncore, _MMIO(addr + i * 4), mocs);
}
static u32 mocs_offset(const struct intel_engine_cs *engine)
{
static const u32 offset[] = {
[RCS0] = __GEN9_RCS0_MOCS0,
[VCS0] = __GEN9_VCS0_MOCS0,
[VCS1] = __GEN9_VCS1_MOCS0,
[VECS0] = __GEN9_VECS0_MOCS0,
[BCS0] = __GEN9_BCS0_MOCS0,
[VCS2] = __GEN11_VCS2_MOCS0,
};
GEM_BUG_ON(engine->id >= ARRAY_SIZE(offset));
return offset[engine->id];
}
static void init_mocs_table(struct intel_engine_cs *engine,
const struct drm_i915_mocs_table *table)
{
__init_mocs_table(engine->uncore, table, mocs_offset(engine));
}
/*
* Get l3cc_value from MOCS entry taking into account when it's not used
* then if unused_entries_index is not zero then its value will be returned
* otherwise I915_MOCS_PTE's value is returned in this case.
*/
static u16 get_entry_l3cc(const struct drm_i915_mocs_table *table,
unsigned int index)
{
if (index < table->size && table->table[index].used)
return table->table[index].l3cc_value;
return table->table[table->unused_entries_index].l3cc_value;
}
static u32 l3cc_combine(u16 low, u16 high)
{
return low | (u32)high << 16;
}
#define for_each_l3cc(l3cc, t, i) \
for (i = 0; \
i < ((t)->n_entries + 1) / 2 ? \
(l3cc = l3cc_combine(get_entry_l3cc((t), 2 * i), \
get_entry_l3cc((t), 2 * i + 1))), 1 : \
0; \
i++)
static void init_l3cc_table(struct intel_gt *gt,
const struct drm_i915_mocs_table *table)
{
unsigned long flags;
unsigned int i;
u32 l3cc;
intel_gt_mcr_lock(gt, &flags);
for_each_l3cc(l3cc, table, i)
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(gt->uncore, GEN9_LNCFCMOCS(i), l3cc);
intel_gt_mcr_unlock(gt, flags);
}
void intel_mocs_init_engine(struct intel_engine_cs *engine)
{
struct drm_i915_mocs_table table;
unsigned int flags;
/* Called under a blanket forcewake */
assert_forcewakes_active(engine->uncore, FORCEWAKE_ALL);
flags = get_mocs_settings(engine->i915, &table);
if (!flags)
return;
/* Platforms with global MOCS do not need per-engine initialization. */
if (flags & HAS_ENGINE_MOCS)
init_mocs_table(engine, &table);
if (flags & HAS_RENDER_L3CC && engine->class == RENDER_CLASS)
init_l3cc_table(engine->gt, &table);
}
static u32 global_mocs_offset(void)
{
return i915_mmio_reg_offset(GEN12_GLOBAL_MOCS(0));
}
void intel_set_mocs_index(struct intel_gt *gt)
{
struct drm_i915_mocs_table table;
get_mocs_settings(gt->i915, &table);
gt->mocs.uc_index = table.uc_index;
if (HAS_L3_CCS_READ(gt->i915))
gt->mocs.wb_index = table.wb_index;
}
void intel_mocs_init(struct intel_gt *gt)
{
struct drm_i915_mocs_table table;
unsigned int flags;
/*
* LLC and eDRAM control values are not applicable to dgfx
*/
flags = get_mocs_settings(gt->i915, &table);
if (flags & HAS_GLOBAL_MOCS)
__init_mocs_table(gt->uncore, &table, global_mocs_offset());
/*
* Initialize the L3CC table as part of mocs initalization to make
* sure the LNCFCMOCSx registers are programmed for the subsequent
* memory transactions including guc transactions
*/
if (flags & HAS_RENDER_L3CC)
init_l3cc_table(gt, &table);
}
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
#include "selftest_mocs.c"
#endif