Currently, the available UMA allocation configs in the integrated system
information table have not been parsed. Add a helper function to retrieve
and store these configs.

Co-developed-by: Mario Limonciello (AMD) <[email protected]>
Signed-off-by: Mario Limonciello (AMD) <[email protected]>
Signed-off-by: Yo-Jung Leo Lin (AMD) <[email protected]>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h              | 32 +++++++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c         |  2 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c | 73 ++++++++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h |  2 +
 4 files changed, 109 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h 
b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index a5574e84694b..2c1123291577 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1675,6 +1675,38 @@ struct amdgpu_numa_info {
        int nid;
 };
 
+#define MAX_UMA_OPTION_NAME    28
+#define MAX_UMA_OPTION_ENTRIES 19
+
+#define AMDGPU_UMA_FLAG_AUTO   BIT(1)
+#define AMDGPU_UMA_FLAG_CUSTOM BIT(0)
+
+/**
+ * struct amdgpu_uma_carveut_option - single UMA carveout option
+ * @name: Name of the carveout option
+ * @memory_carved: Amount of memory carved
+ * @flags: ATCS flags supported by this option
+ */
+struct amdgpu_uma_carveout_option {
+       char name[MAX_UMA_OPTION_NAME];
+       uint8_t memory_carved;
+       uint8_t flags;
+};
+
+/**
+ * struct amdgpu_uma_carveut_info - table of available UMA carveout options
+ * @num_entries: Number of available options
+ * @uma_option_index: The index of the option currently applied
+ * @update_lock: Lock to serialize changes to the option
+ * @entries: The array of carveout options
+ */
+struct amdgpu_uma_carveout_info {
+       uint8_t num_entries;
+       uint8_t uma_option_index;
+       struct mutex update_lock;
+       struct amdgpu_uma_carveout_option entries[MAX_UMA_OPTION_ENTRIES];
+};
+
 /* ATCS Device/Driver State */
 #define AMDGPU_ATCS_PSC_DEV_STATE_D0           0
 #define AMDGPU_ATCS_PSC_DEV_STATE_D3_HOT       3
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
index 0743fd8620e4..d442dc442d34 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
@@ -38,6 +38,7 @@
 #include "amdgpu_display.h"
 #include "amd_acpi.h"
 #include "atom.h"
+#include "amdgpu_atomfirmware.h"
 
 /* Declare GUID for AMD _DSM method for XCCs */
 static const guid_t amd_xcc_dsm_guid = GUID_INIT(0x8267f5d5, 0xa556, 0x44f2,
@@ -125,6 +126,7 @@ struct amdgpu_atcs {
        acpi_handle handle;
 
        struct amdgpu_atcs_functions functions;
+       struct amdgpu_uma_carveout_info uma_info;
 };
 
 static struct amdgpu_acpi_priv {
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
index 636385c80f64..b1463bb594aa 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
@@ -296,6 +296,79 @@ static int convert_atom_mem_type_to_vram_type(struct 
amdgpu_device *adev,
        return vram_type;
 }
 
+static int amdgpu_atomfirmware_get_uma_carveout_info_v2_3(struct amdgpu_device 
*adev,
+                                                         union igp_info 
*igp_info,
+                                                         struct 
amdgpu_uma_carveout_info *uma_info)
+{
+       struct uma_carveout_option *opts;
+       uint8_t nr_uma_options;
+       int i;
+
+       nr_uma_options = igp_info->v23.UMACarveoutIndexMax;
+
+       if (!nr_uma_options)
+               return -ENODEV;
+
+       if (nr_uma_options > MAX_UMA_OPTION_ENTRIES) {
+               drm_dbg(adev_to_drm(adev),
+                       "Number of UMA options exceeds max table size. Options 
will not be parsed");
+               return -EINVAL;
+       }
+
+       uma_info->num_entries = nr_uma_options;
+       uma_info->uma_option_index = igp_info->v23.UMACarveoutIndex;
+
+       opts = igp_info->v23.UMASizeControlOption;
+
+       for (i = 0; i < nr_uma_options; i++) {
+               uma_info->entries[i].memory_carved = opts[i].memoryCarvedGb;
+               uma_info->entries[i].flags = 
opts[i].uma_carveout_option_flags.all8;
+               strscpy(uma_info->entries[i].name, opts[i].optionName, 
MAX_UMA_OPTION_NAME);
+       }
+
+       return 0;
+}
+
+int amdgpu_atomfirmware_get_uma_carveout_info(struct amdgpu_device *adev,
+                                             struct amdgpu_uma_carveout_info 
*uma_info)
+{
+       struct amdgpu_mode_info *mode_info = &adev->mode_info;
+       union igp_info *igp_info;
+       u16 data_offset, size;
+       u8 frev, crev;
+       int index;
+
+       if (!(adev->flags & AMD_IS_APU))
+               return -ENODEV;
+
+       index = 
get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
+                                           integratedsysteminfo);
+
+       if (!amdgpu_atom_parse_data_header(mode_info->atom_context,
+                                         index, &size,
+                                         &frev, &crev, &data_offset)) {
+               return -EINVAL;
+       }
+
+       igp_info = (union igp_info *)
+                       (mode_info->atom_context->bios + data_offset);
+
+       switch (frev) {
+       case 2:
+               switch (crev) {
+               case 3:
+                       return 
amdgpu_atomfirmware_get_uma_carveout_info_v2_3(adev, igp_info, uma_info);
+               break;
+               default:
+                       break;
+               }
+               break;
+       default:
+               break;
+       }
+       return -ENODEV;
+}
+
 int
 amdgpu_atomfirmware_get_vram_info(struct amdgpu_device *adev,
                                  int *vram_width, int *vram_type,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h
index 649b5530d8ae..67c8d105729b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h
@@ -32,6 +32,8 @@ void amdgpu_atomfirmware_scratch_regs_init(struct 
amdgpu_device *adev);
 int amdgpu_atomfirmware_allocate_fb_scratch(struct amdgpu_device *adev);
 int amdgpu_atomfirmware_get_vram_info(struct amdgpu_device *adev,
        int *vram_width, int *vram_type, int *vram_vendor);
+int amdgpu_atomfirmware_get_uma_carveout_info(struct amdgpu_device *adev,
+                                             struct amdgpu_uma_carveout_info 
*uma_info);
 int amdgpu_atomfirmware_get_clock_info(struct amdgpu_device *adev);
 int amdgpu_atomfirmware_get_gfx_info(struct amdgpu_device *adev);
 bool amdgpu_atomfirmware_mem_ecc_supported(struct amdgpu_device *adev);

-- 
2.43.0

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