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Diffstat (limited to 'drivers/gpu/drm/xe/xe_pat.c')
-rw-r--r--drivers/gpu/drm/xe/xe_pat.c459
1 files changed, 459 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_pat.c b/drivers/gpu/drm/xe/xe_pat.c
new file mode 100644
index 000000000000..1ff6bc79e7d4
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_pat.c
@@ -0,0 +1,459 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+
+#include "xe_pat.h"
+
+#include <drm/xe_drm.h>
+
+#include "regs/xe_reg_defs.h"
+#include "xe_assert.h"
+#include "xe_device.h"
+#include "xe_gt.h"
+#include "xe_gt_mcr.h"
+#include "xe_mmio.h"
+
+#define _PAT_ATS 0x47fc
+#define _PAT_INDEX(index) _PICK_EVEN_2RANGES(index, 8, \
+ 0x4800, 0x4804, \
+ 0x4848, 0x484c)
+#define _PAT_PTA 0x4820
+
+#define XE2_NO_PROMOTE REG_BIT(10)
+#define XE2_COMP_EN REG_BIT(9)
+#define XE2_L3_CLOS REG_GENMASK(7, 6)
+#define XE2_L3_POLICY REG_GENMASK(5, 4)
+#define XE2_L4_POLICY REG_GENMASK(3, 2)
+#define XE2_COH_MODE REG_GENMASK(1, 0)
+
+#define XELPG_L4_POLICY_MASK REG_GENMASK(3, 2)
+#define XELPG_PAT_3_UC REG_FIELD_PREP(XELPG_L4_POLICY_MASK, 3)
+#define XELPG_PAT_1_WT REG_FIELD_PREP(XELPG_L4_POLICY_MASK, 1)
+#define XELPG_PAT_0_WB REG_FIELD_PREP(XELPG_L4_POLICY_MASK, 0)
+#define XELPG_INDEX_COH_MODE_MASK REG_GENMASK(1, 0)
+#define XELPG_3_COH_2W REG_FIELD_PREP(XELPG_INDEX_COH_MODE_MASK, 3)
+#define XELPG_2_COH_1W REG_FIELD_PREP(XELPG_INDEX_COH_MODE_MASK, 2)
+#define XELPG_0_COH_NON REG_FIELD_PREP(XELPG_INDEX_COH_MODE_MASK, 0)
+
+#define XEHPC_CLOS_LEVEL_MASK REG_GENMASK(3, 2)
+#define XEHPC_PAT_CLOS(x) REG_FIELD_PREP(XEHPC_CLOS_LEVEL_MASK, x)
+
+#define XELP_MEM_TYPE_MASK REG_GENMASK(1, 0)
+#define XELP_PAT_WB REG_FIELD_PREP(XELP_MEM_TYPE_MASK, 3)
+#define XELP_PAT_WT REG_FIELD_PREP(XELP_MEM_TYPE_MASK, 2)
+#define XELP_PAT_WC REG_FIELD_PREP(XELP_MEM_TYPE_MASK, 1)
+#define XELP_PAT_UC REG_FIELD_PREP(XELP_MEM_TYPE_MASK, 0)
+
+static const char *XELP_MEM_TYPE_STR_MAP[] = { "UC", "WC", "WT", "WB" };
+
+struct xe_pat_ops {
+ void (*program_graphics)(struct xe_gt *gt, const struct xe_pat_table_entry table[],
+ int n_entries);
+ void (*program_media)(struct xe_gt *gt, const struct xe_pat_table_entry table[],
+ int n_entries);
+ void (*dump)(struct xe_gt *gt, struct drm_printer *p);
+};
+
+static const struct xe_pat_table_entry xelp_pat_table[] = {
+ [0] = { XELP_PAT_WB, XE_COH_AT_LEAST_1WAY },
+ [1] = { XELP_PAT_WC, XE_COH_NONE },
+ [2] = { XELP_PAT_WT, XE_COH_NONE },
+ [3] = { XELP_PAT_UC, XE_COH_NONE },
+};
+
+static const struct xe_pat_table_entry xehpc_pat_table[] = {
+ [0] = { XELP_PAT_UC, XE_COH_NONE },
+ [1] = { XELP_PAT_WC, XE_COH_NONE },
+ [2] = { XELP_PAT_WT, XE_COH_NONE },
+ [3] = { XELP_PAT_WB, XE_COH_AT_LEAST_1WAY },
+ [4] = { XEHPC_PAT_CLOS(1) | XELP_PAT_WT, XE_COH_NONE },
+ [5] = { XEHPC_PAT_CLOS(1) | XELP_PAT_WB, XE_COH_AT_LEAST_1WAY },
+ [6] = { XEHPC_PAT_CLOS(2) | XELP_PAT_WT, XE_COH_NONE },
+ [7] = { XEHPC_PAT_CLOS(2) | XELP_PAT_WB, XE_COH_AT_LEAST_1WAY },
+};
+
+static const struct xe_pat_table_entry xelpg_pat_table[] = {
+ [0] = { XELPG_PAT_0_WB, XE_COH_NONE },
+ [1] = { XELPG_PAT_1_WT, XE_COH_NONE },
+ [2] = { XELPG_PAT_3_UC, XE_COH_NONE },
+ [3] = { XELPG_PAT_0_WB | XELPG_2_COH_1W, XE_COH_AT_LEAST_1WAY },
+ [4] = { XELPG_PAT_0_WB | XELPG_3_COH_2W, XE_COH_AT_LEAST_1WAY },
+};
+
+/*
+ * The Xe2 table is getting large/complicated so it's easier to review if
+ * provided in a form that exactly matches the bspec's formatting. The meaning
+ * of the fields here are:
+ * - no_promote: 0=promotable, 1=no promote
+ * - comp_en: 0=disable, 1=enable
+ * - l3clos: L3 class of service (0-3)
+ * - l3_policy: 0=WB, 1=XD ("WB - Transient Display"), 3=UC
+ * - l4_policy: 0=WB, 1=WT, 3=UC
+ * - coh_mode: 0=no snoop, 2=1-way coherent, 3=2-way coherent
+ *
+ * Reserved entries should be programmed with the maximum caching, minimum
+ * coherency (which matches an all-0's encoding), so we can just omit them
+ * in the table.
+ */
+#define XE2_PAT(no_promote, comp_en, l3clos, l3_policy, l4_policy, __coh_mode) \
+ { \
+ .value = (no_promote ? XE2_NO_PROMOTE : 0) | \
+ (comp_en ? XE2_COMP_EN : 0) | \
+ REG_FIELD_PREP(XE2_L3_CLOS, l3clos) | \
+ REG_FIELD_PREP(XE2_L3_POLICY, l3_policy) | \
+ REG_FIELD_PREP(XE2_L4_POLICY, l4_policy) | \
+ REG_FIELD_PREP(XE2_COH_MODE, __coh_mode), \
+ .coh_mode = __coh_mode ? XE_COH_AT_LEAST_1WAY : XE_COH_NONE \
+ }
+
+static const struct xe_pat_table_entry xe2_pat_table[] = {
+ [ 0] = XE2_PAT( 0, 0, 0, 0, 3, 0 ),
+ [ 1] = XE2_PAT( 0, 0, 0, 0, 3, 2 ),
+ [ 2] = XE2_PAT( 0, 0, 0, 0, 3, 3 ),
+ [ 3] = XE2_PAT( 0, 0, 0, 3, 3, 0 ),
+ [ 4] = XE2_PAT( 0, 0, 0, 3, 0, 2 ),
+ [ 5] = XE2_PAT( 0, 0, 0, 3, 3, 2 ),
+ [ 6] = XE2_PAT( 1, 0, 0, 1, 3, 0 ),
+ [ 7] = XE2_PAT( 0, 0, 0, 3, 0, 3 ),
+ [ 8] = XE2_PAT( 0, 0, 0, 3, 0, 0 ),
+ [ 9] = XE2_PAT( 0, 1, 0, 0, 3, 0 ),
+ [10] = XE2_PAT( 0, 1, 0, 3, 0, 0 ),
+ [11] = XE2_PAT( 1, 1, 0, 1, 3, 0 ),
+ [12] = XE2_PAT( 0, 1, 0, 3, 3, 0 ),
+ [13] = XE2_PAT( 0, 0, 0, 0, 0, 0 ),
+ [14] = XE2_PAT( 0, 1, 0, 0, 0, 0 ),
+ [15] = XE2_PAT( 1, 1, 0, 1, 1, 0 ),
+ /* 16..19 are reserved; leave set to all 0's */
+ [20] = XE2_PAT( 0, 0, 1, 0, 3, 0 ),
+ [21] = XE2_PAT( 0, 1, 1, 0, 3, 0 ),
+ [22] = XE2_PAT( 0, 0, 1, 0, 3, 2 ),
+ [23] = XE2_PAT( 0, 0, 1, 0, 3, 3 ),
+ [24] = XE2_PAT( 0, 0, 2, 0, 3, 0 ),
+ [25] = XE2_PAT( 0, 1, 2, 0, 3, 0 ),
+ [26] = XE2_PAT( 0, 0, 2, 0, 3, 2 ),
+ [27] = XE2_PAT( 0, 0, 2, 0, 3, 3 ),
+ [28] = XE2_PAT( 0, 0, 3, 0, 3, 0 ),
+ [29] = XE2_PAT( 0, 1, 3, 0, 3, 0 ),
+ [30] = XE2_PAT( 0, 0, 3, 0, 3, 2 ),
+ [31] = XE2_PAT( 0, 0, 3, 0, 3, 3 ),
+};
+
+/* Special PAT values programmed outside the main table */
+static const struct xe_pat_table_entry xe2_pat_ats = XE2_PAT( 0, 0, 0, 0, 3, 3 );
+
+u16 xe_pat_index_get_coh_mode(struct xe_device *xe, u16 pat_index)
+{
+ WARN_ON(pat_index >= xe->pat.n_entries);
+ return xe->pat.table[pat_index].coh_mode;
+}
+
+static void program_pat(struct xe_gt *gt, const struct xe_pat_table_entry table[],
+ int n_entries)
+{
+ for (int i = 0; i < n_entries; i++) {
+ struct xe_reg reg = XE_REG(_PAT_INDEX(i));
+
+ xe_mmio_write32(gt, reg, table[i].value);
+ }
+}
+
+static void program_pat_mcr(struct xe_gt *gt, const struct xe_pat_table_entry table[],
+ int n_entries)
+{
+ for (int i = 0; i < n_entries; i++) {
+ struct xe_reg_mcr reg_mcr = XE_REG_MCR(_PAT_INDEX(i));
+
+ xe_gt_mcr_multicast_write(gt, reg_mcr, table[i].value);
+ }
+}
+
+static void xelp_dump(struct xe_gt *gt, struct drm_printer *p)
+{
+ struct xe_device *xe = gt_to_xe(gt);
+ int i, err;
+
+ xe_device_mem_access_get(xe);
+ err = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
+ if (err)
+ goto err_fw;
+
+ drm_printf(p, "PAT table:\n");
+
+ for (i = 0; i < xe->pat.n_entries; i++) {
+ u32 pat = xe_mmio_read32(gt, XE_REG(_PAT_INDEX(i)));
+ u8 mem_type = REG_FIELD_GET(XELP_MEM_TYPE_MASK, pat);
+
+ drm_printf(p, "PAT[%2d] = %s (%#8x)\n", i,
+ XELP_MEM_TYPE_STR_MAP[mem_type], pat);
+ }
+
+ err = xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
+err_fw:
+ xe_assert(xe, !err);
+ xe_device_mem_access_put(xe);
+}
+
+static const struct xe_pat_ops xelp_pat_ops = {
+ .program_graphics = program_pat,
+ .dump = xelp_dump,
+};
+
+static void xehp_dump(struct xe_gt *gt, struct drm_printer *p)
+{
+ struct xe_device *xe = gt_to_xe(gt);
+ int i, err;
+
+ xe_device_mem_access_get(xe);
+ err = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
+ if (err)
+ goto err_fw;
+
+ drm_printf(p, "PAT table:\n");
+
+ for (i = 0; i < xe->pat.n_entries; i++) {
+ u32 pat = xe_gt_mcr_unicast_read_any(gt, XE_REG_MCR(_PAT_INDEX(i)));
+ u8 mem_type;
+
+ mem_type = REG_FIELD_GET(XELP_MEM_TYPE_MASK, pat);
+
+ drm_printf(p, "PAT[%2d] = %s (%#8x)\n", i,
+ XELP_MEM_TYPE_STR_MAP[mem_type], pat);
+ }
+
+ err = xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
+err_fw:
+ xe_assert(xe, !err);
+ xe_device_mem_access_put(xe);
+}
+
+static const struct xe_pat_ops xehp_pat_ops = {
+ .program_graphics = program_pat_mcr,
+ .dump = xehp_dump,
+};
+
+static void xehpc_dump(struct xe_gt *gt, struct drm_printer *p)
+{
+ struct xe_device *xe = gt_to_xe(gt);
+ int i, err;
+
+ xe_device_mem_access_get(xe);
+ err = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
+ if (err)
+ goto err_fw;
+
+ drm_printf(p, "PAT table:\n");
+
+ for (i = 0; i < xe->pat.n_entries; i++) {
+ u32 pat = xe_gt_mcr_unicast_read_any(gt, XE_REG_MCR(_PAT_INDEX(i)));
+
+ drm_printf(p, "PAT[%2d] = [ %u, %u ] (%#8x)\n", i,
+ REG_FIELD_GET(XELP_MEM_TYPE_MASK, pat),
+ REG_FIELD_GET(XEHPC_CLOS_LEVEL_MASK, pat), pat);
+ }
+
+ err = xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
+err_fw:
+ xe_assert(xe, !err);
+ xe_device_mem_access_put(xe);
+}
+
+static const struct xe_pat_ops xehpc_pat_ops = {
+ .program_graphics = program_pat_mcr,
+ .dump = xehpc_dump,
+};
+
+static void xelpg_dump(struct xe_gt *gt, struct drm_printer *p)
+{
+ struct xe_device *xe = gt_to_xe(gt);
+ int i, err;
+
+ xe_device_mem_access_get(xe);
+ err = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
+ if (err)
+ goto err_fw;
+
+ drm_printf(p, "PAT table:\n");
+
+ for (i = 0; i < xe->pat.n_entries; i++) {
+ u32 pat;
+
+ if (xe_gt_is_media_type(gt))
+ pat = xe_mmio_read32(gt, XE_REG(_PAT_INDEX(i)));
+ else
+ pat = xe_gt_mcr_unicast_read_any(gt, XE_REG_MCR(_PAT_INDEX(i)));
+
+ drm_printf(p, "PAT[%2d] = [ %u, %u ] (%#8x)\n", i,
+ REG_FIELD_GET(XELPG_L4_POLICY_MASK, pat),
+ REG_FIELD_GET(XELPG_INDEX_COH_MODE_MASK, pat), pat);
+ }
+
+ err = xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
+err_fw:
+ xe_assert(xe, !err);
+ xe_device_mem_access_put(xe);
+}
+
+/*
+ * SAMedia register offsets are adjusted by the write methods and they target
+ * registers that are not MCR, while for normal GT they are MCR
+ */
+static const struct xe_pat_ops xelpg_pat_ops = {
+ .program_graphics = program_pat,
+ .program_media = program_pat_mcr,
+ .dump = xelpg_dump,
+};
+
+static void xe2lpg_program_pat(struct xe_gt *gt, const struct xe_pat_table_entry table[],
+ int n_entries)
+{
+ program_pat_mcr(gt, table, n_entries);
+ xe_gt_mcr_multicast_write(gt, XE_REG_MCR(_PAT_ATS), xe2_pat_ats.value);
+}
+
+static void xe2lpm_program_pat(struct xe_gt *gt, const struct xe_pat_table_entry table[],
+ int n_entries)
+{
+ program_pat(gt, table, n_entries);
+ xe_mmio_write32(gt, XE_REG(_PAT_ATS), xe2_pat_ats.value);
+}
+
+static void xe2_dump(struct xe_gt *gt, struct drm_printer *p)
+{
+ struct xe_device *xe = gt_to_xe(gt);
+ int i, err;
+ u32 pat;
+
+ xe_device_mem_access_get(xe);
+ err = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
+ if (err)
+ goto err_fw;
+
+ drm_printf(p, "PAT table:\n");
+
+ for (i = 0; i < xe->pat.n_entries; i++) {
+ if (xe_gt_is_media_type(gt))
+ pat = xe_mmio_read32(gt, XE_REG(_PAT_INDEX(i)));
+ else
+ pat = xe_gt_mcr_unicast_read_any(gt, XE_REG_MCR(_PAT_INDEX(i)));
+
+ drm_printf(p, "PAT[%2d] = [ %u, %u, %u, %u, %u, %u ] (%#8x)\n", i,
+ !!(pat & XE2_NO_PROMOTE),
+ !!(pat & XE2_COMP_EN),
+ REG_FIELD_GET(XE2_L3_CLOS, pat),
+ REG_FIELD_GET(XE2_L3_POLICY, pat),
+ REG_FIELD_GET(XE2_L4_POLICY, pat),
+ REG_FIELD_GET(XE2_COH_MODE, pat),
+ pat);
+ }
+
+ /*
+ * Also print PTA_MODE, which describes how the hardware accesses
+ * PPGTT entries.
+ */
+ if (xe_gt_is_media_type(gt))
+ pat = xe_mmio_read32(gt, XE_REG(_PAT_PTA));
+ else
+ pat = xe_gt_mcr_unicast_read_any(gt, XE_REG_MCR(_PAT_PTA));
+
+ drm_printf(p, "Page Table Access:\n");
+ drm_printf(p, "PTA_MODE= [ %u, %u, %u, %u, %u, %u ] (%#8x)\n",
+ !!(pat & XE2_NO_PROMOTE),
+ !!(pat & XE2_COMP_EN),
+ REG_FIELD_GET(XE2_L3_CLOS, pat),
+ REG_FIELD_GET(XE2_L3_POLICY, pat),
+ REG_FIELD_GET(XE2_L4_POLICY, pat),
+ REG_FIELD_GET(XE2_COH_MODE, pat),
+ pat);
+
+ err = xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
+err_fw:
+ xe_assert(xe, !err);
+ xe_device_mem_access_put(xe);
+}
+
+static const struct xe_pat_ops xe2_pat_ops = {
+ .program_graphics = xe2lpg_program_pat,
+ .program_media = xe2lpm_program_pat,
+ .dump = xe2_dump,
+};
+
+void xe_pat_init_early(struct xe_device *xe)
+{
+ if (GRAPHICS_VER(xe) == 20) {
+ xe->pat.ops = &xe2_pat_ops;
+ xe->pat.table = xe2_pat_table;
+ xe->pat.n_entries = ARRAY_SIZE(xe2_pat_table);
+ xe->pat.idx[XE_CACHE_NONE] = 3;
+ xe->pat.idx[XE_CACHE_WT] = 15;
+ xe->pat.idx[XE_CACHE_WB] = 2;
+ xe->pat.idx[XE_CACHE_NONE_COMPRESSION] = 12; /*Applicable on xe2 and beyond */
+ } else if (xe->info.platform == XE_METEORLAKE) {
+ xe->pat.ops = &xelpg_pat_ops;
+ xe->pat.table = xelpg_pat_table;
+ xe->pat.n_entries = ARRAY_SIZE(xelpg_pat_table);
+ xe->pat.idx[XE_CACHE_NONE] = 2;
+ xe->pat.idx[XE_CACHE_WT] = 1;
+ xe->pat.idx[XE_CACHE_WB] = 3;
+ } else if (xe->info.platform == XE_PVC) {
+ xe->pat.ops = &xehpc_pat_ops;
+ xe->pat.table = xehpc_pat_table;
+ xe->pat.n_entries = ARRAY_SIZE(xehpc_pat_table);
+ xe->pat.idx[XE_CACHE_NONE] = 0;
+ xe->pat.idx[XE_CACHE_WT] = 2;
+ xe->pat.idx[XE_CACHE_WB] = 3;
+ } else if (xe->info.platform == XE_DG2) {
+ /*
+ * Table is the same as previous platforms, but programming
+ * method has changed.
+ */
+ xe->pat.ops = &xehp_pat_ops;
+ xe->pat.table = xelp_pat_table;
+ xe->pat.n_entries = ARRAY_SIZE(xelp_pat_table);
+ xe->pat.idx[XE_CACHE_NONE] = 3;
+ xe->pat.idx[XE_CACHE_WT] = 2;
+ xe->pat.idx[XE_CACHE_WB] = 0;
+ } else if (GRAPHICS_VERx100(xe) <= 1210) {
+ WARN_ON_ONCE(!IS_DGFX(xe) && !xe->info.has_llc);
+ xe->pat.ops = &xelp_pat_ops;
+ xe->pat.table = xelp_pat_table;
+ xe->pat.n_entries = ARRAY_SIZE(xelp_pat_table);
+ xe->pat.idx[XE_CACHE_NONE] = 3;
+ xe->pat.idx[XE_CACHE_WT] = 2;
+ xe->pat.idx[XE_CACHE_WB] = 0;
+ } else {
+ /*
+ * Going forward we expect to need new PAT settings for most
+ * new platforms; failure to provide a new table can easily
+ * lead to subtle, hard-to-debug problems. If none of the
+ * conditions above match the platform we're running on we'll
+ * raise an error rather than trying to silently inherit the
+ * most recent platform's behavior.
+ */
+ drm_err(&xe->drm, "Missing PAT table for platform with graphics version %d.%02d!\n",
+ GRAPHICS_VER(xe), GRAPHICS_VERx100(xe) % 100);
+ }
+}
+
+void xe_pat_init(struct xe_gt *gt)
+{
+ struct xe_device *xe = gt_to_xe(gt);
+
+ if (!xe->pat.ops)
+ return;
+
+ if (xe_gt_is_media_type(gt))
+ xe->pat.ops->program_media(gt, xe->pat.table, xe->pat.n_entries);
+ else
+ xe->pat.ops->program_graphics(gt, xe->pat.table, xe->pat.n_entries);
+}
+
+void xe_pat_dump(struct xe_gt *gt, struct drm_printer *p)
+{
+ struct xe_device *xe = gt_to_xe(gt);
+
+ if (!xe->pat.ops->dump)
+ return;
+
+ xe->pat.ops->dump(gt, p);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-11 20:32:30 +0100