The SoC can implement acpi_fill_iort to update the IORT table. Add a helper function to fill out the NAMED_COMPONENT node.
TEST=Run FWTS V24.03.00 on RPi4 and round no problems.
Signed-off-by: Patrick Rudolph patrick.rudolph@9elements.com Cc: Simon Glass sjg@chromium.org --- include/acpi/acpi_table.h | 213 ++++++++++++++++++++++++++++++++++++++ lib/acpi/acpi_table.c | 213 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 426 insertions(+)
diff --git a/include/acpi/acpi_table.h b/include/acpi/acpi_table.h index a270fcba1b..f85ec9fa04 100644 --- a/include/acpi/acpi_table.h +++ b/include/acpi/acpi_table.h @@ -832,6 +832,117 @@ struct acpi_pptt_cache { u16 line_size; } __packed;
+/** IORT - IO Remapping Table revision 6 + * Document number: ARM DEN 0049E.e, Sep 2022 + */ +struct acpi_table_iort { + struct acpi_table_header header; + u32 node_count; + u32 node_offset; + u32 reserved; +} __packed; + +/* + * IORT subtables + */ +struct acpi_iort_node { + u8 type; + u16 length; + u8 revision; + u32 identifier; + u32 mapping_count; + u32 mapping_offset; + char node_data[]; +} __packed; + +/* Values for subtable Type above */ +enum acpi_iort_node_type { + ACPI_IORT_NODE_ITS_GROUP = 0x00, + ACPI_IORT_NODE_NAMED_COMPONENT = 0x01, + ACPI_IORT_NODE_PCI_ROOT_COMPLEX = 0x02, + ACPI_IORT_NODE_SMMU = 0x03, + ACPI_IORT_NODE_SMMU_V3 = 0x04, + ACPI_IORT_NODE_PMCG = 0x05, + ACPI_IORT_NODE_RMR = 0x06, +}; + +/* ITS Group revision 1 */ +struct acpi_iort_its_group { + u32 its_count; + u32 identifiers[]; /* GIC ITS identifier array */ +} __packed; + +/* PCI root complex node revision 2 */ +struct acpi_iort_rc { + u64 mem_access_properties; + u32 ats_attributes; + u32 pci_segment_number; + u8 memory_address_size_limit; + u8 reserved[3]; +} __packed; + +/* SMMUv3 revision 5 */ +struct acpi_iort_smmu_v3 { + u64 base_address; /* SMMUv3 base address */ + u32 flags; + u32 reserved; + u64 vatos_address; + u32 model; + u32 event_gsiv; + u32 pri_gsiv; + u32 gerr_gsiv; + u32 sync_gsiv; + u32 pxm; + u32 id_mapping_index; +} __packed; + +/* Masks for Flags field above */ +#define ACPI_IORT_SMMU_V3_COHACC_OVERRIDE (1) +#define ACPI_IORT_SMMU_V3_HTTU_OVERRIDE (3 << 1) +#define ACPI_IORT_SMMU_V3_PXM_VALID (1 << 3) +#define ACPI_IORT_SMMU_V3_DEVICEID_VALID (1 << 4) + +struct acpi_iort_id_mapping { + u32 input_base; /* Lowest value in input range */ + u32 id_count; /* Number of IDs */ + u32 output_base; /* Lowest value in output range */ + u32 output_reference; /* A reference to the output node */ + u32 flags; +} __packed; + +/* Masks for Flags field above for IORT subtable */ +#define ACPI_IORT_ID_SINGLE_MAPPING (1) + +/* Named Component revision 4 */ +struct acpi_iort_named_component { + u32 node_flags; + u64 memory_properties; /* Memory access properties */ + u8 memory_address_limit; /* Memory address size limit */ + char device_name[]; /* Path of namespace object */ +} __packed; + +/* Masks for Flags field above */ +#define ACPI_IORT_NC_STALL_SUPPORTED (1) +#define ACPI_IORT_NC_PASID_BITS (31 << 1) + +struct acpi_iort_root_complex { + u64 memory_properties; /* Memory access properties */ + u32 ats_attribute; + u32 pci_segment_number; + u8 memory_address_limit;/* Memory address size limit */ + u16 pasid_capabilities; /* PASID Capabilities */ + u8 reserved; /* Reserved, must be zero */ + u32 flags; /* Flags */ +} __packed; + +/* Masks for ats_attribute field above */ +#define ACPI_IORT_ATS_SUPPORTED (1) /* The root complex ATS support */ +#define ACPI_IORT_PRI_SUPPORTED (1 << 1) /* The root complex PRI support */ +#define ACPI_IORT_PASID_FWD_SUPPORTED (1 << 2) /* The root complex PASID forward support */ + +/* Masks for pasid_capabilities field above */ +#define ACPI_IORT_PASID_MAX_WIDTH (0x1F) /* Bits 0-4 */ + /* Tables defined/reserved by ACPI and generated by U-Boot */ enum acpi_tables { ACPITAB_BERT, @@ -1000,6 +1111,108 @@ int acpi_fill_csrt(struct acpi_ctx *ctx); */ void acpi_fill_fadt(struct acpi_fadt *fadt);
+/** + * acpi_fill_iort() - Fill out the body of the IORT table + * + * Should be implemented in SoC specific code. + * + * @ctx: ACPI context to write to + * @offset: Offset from the start of the IORT + */ +int acpi_fill_iort(struct acpi_ctx *ctx); + +/** + * acpi_iort_add_its_group() - Add ITS group node to IORT table + * + * Called by SoC specific code within acpi_fill_iort(). + * + * @ctx: ACPI context to write to + * @its_count: Elements in identifiers + * @identifiers: The array of ITS identifiers. These IDs must match the value + * used in the Multiple APIC Description Table (MADT) GIC ITS + * structure for each relevant ITS unit. + * @return Offset of table within parent + */ +int acpi_iort_add_its_group(struct acpi_ctx *ctx, + const u32 its_count, + const u32 *identifiers); + +/** + * acpi_iort_add_named_component() - Add named component to IORT table + * + * Called by SoC specific code within acpi_fill_iort(). + * + * @ctx: ACPI context to write to + * @node_flags: Node flags + * @memory_properties: Memory properties + * @memory_address_limit: Memory address limit + * @device_name: ACPI device path + * @return Offset of table within parent + */ +int acpi_iort_add_named_component(struct acpi_ctx *ctx, + const u32 node_flags, + const u64 memory_properties, + const u8 memory_address_limit, + const char *device_name); + +/** + * acpi_iort_add_rc() - Add PCI root complex node to IORT table + * + * Called by SoC specific code within acpi_fill_iort(). + * + * @ctx: ACPI context to write to + * @mem_access_properties: Memory access properties + * @ats_attributes: Support for ATS and its ancillary feature + * @pci_segment_number: The PCI segment number, as in MCFG + * @memory_address_size_limit: The number of address bits, starting from LSB + * @num_mappings: Number of elements in map + * @map: ID mappings for this node + * @return Offset of table within parent + */ +int acpi_iort_add_rc(struct acpi_ctx *ctx, + const u64 mem_access_properties, + const u32 ats_attributes, + const u32 pci_segment_number, + const u8 memory_address_size_limit, + const int num_mappings, + const struct acpi_iort_id_mapping *map); + +/** + * acpi_iort_add_smmu_v3() - Add PCI root complex node to IORT table + * + * Called by SoC specific code within acpi_fill_iort(). + * + * @ctx: ACPI context to write to + * @base_address: Base address of SMMU + * @flags: SMMUv3 flags + * @vatos_address: Optional, set to zero if not supported + * @model: Model ID + * @event_gsiv: GSIV of the Event interrupt if SPI based + * @pri_gsiv: GSIV of the PRI interrupt if SPI based + * @gerr_gsiv: GSIV of the GERR interrupt if GSIV based + * @sync_gsiv: TGSIV of the Sync interrupt if GSIV based + * @pxm: Proximity Domain + * @id_mapping_index: If all the SMMU control interrupts are GSIV based, + * this field is ignored. Index into the array of ID + * mapping otherwise. + * @num_mappings: Number of elements in map + * @map: ID mappings for this node + * @return Offset of table within parent + */ +int acpi_iort_add_smmu_v3(struct acpi_ctx *ctx, + const u64 base_address, + const u32 flags, + const u64 vatos_address, + const u32 model, + const u32 event_gsiv, + const u32 pri_gsiv, + const u32 gerr_gsiv, + const u32 sync_gsiv, + const u32 pxm, + const u32 id_mapping_index, + const int num_mappings, + const struct acpi_iort_id_mapping *map); + /** * acpi_fill_madt() - Fill out the body of the MADT * diff --git a/lib/acpi/acpi_table.c b/lib/acpi/acpi_table.c index 657214a532..bdd7b6b066 100644 --- a/lib/acpi/acpi_table.c +++ b/lib/acpi/acpi_table.c @@ -534,3 +534,216 @@ static int acpi_write_spcr(struct acpi_ctx *ctx, const struct acpi_writer *entry }
ACPI_WRITER(5spcr, "SPCR", acpi_write_spcr, 0); + +__weak int acpi_fill_iort(struct acpi_ctx *ctx) +{ + return 0; +} + +int acpi_iort_add_its_group(struct acpi_ctx *ctx, + const u32 its_count, + const u32 *identifiers) +{ + struct acpi_iort_node *node; + struct acpi_iort_its_group *group; + int offset; + + offset = ctx->current - ctx->tab_start; + + node = ctx->current; + memset(node, '\0', sizeof(struct acpi_iort_node)); + + node->type = ACPI_IORT_NODE_ITS_GROUP; + node->revision = 1; + + node->length = sizeof(struct acpi_iort_node); + node->length += sizeof(struct acpi_iort_its_group); + node->length += sizeof(u32) * its_count; + + group = (struct acpi_iort_its_group *)node->node_data; + group->its_count = its_count; + memcpy(&group->identifiers, identifiers, sizeof(u32) * its_count); + + ctx->current += node->length; + + return offset; +} + +int acpi_iort_add_named_component(struct acpi_ctx *ctx, + const u32 node_flags, + const u64 memory_properties, + const u8 memory_address_limit, + const char *device_name) +{ + struct acpi_iort_node *node; + struct acpi_iort_named_component *comp; + int offset; + + offset = ctx->current - ctx->tab_start; + + node = ctx->current; + memset(node, '\0', sizeof(struct acpi_iort_node)); + + node->type = ACPI_IORT_NODE_NAMED_COMPONENT; + node->revision = 4; + node->length = sizeof(struct acpi_iort_node); + node->length += sizeof(struct acpi_iort_named_component); + node->length += strlen(device_name) + 1; + + comp = (struct acpi_iort_named_component *)node->node_data; + + comp->node_flags = node_flags; + comp->memory_properties = memory_properties; + comp->memory_address_limit = memory_address_limit; + memcpy(comp->device_name, device_name, strlen(device_name) + 1); + + ctx->current += node->length; + + return offset; +} + +int acpi_iort_add_rc(struct acpi_ctx *ctx, + const u64 mem_access_properties, + const u32 ats_attributes, + const u32 pci_segment_number, + const u8 memory_address_size_limit, + const int num_mappings, + const struct acpi_iort_id_mapping *map) +{ + struct acpi_iort_id_mapping *mapping; + struct acpi_iort_node *node; + struct acpi_iort_rc *rc; + int offset; + + offset = ctx->current - ctx->tab_start; + + node = ctx->current; + memset(node, '\0', sizeof(struct acpi_iort_node)); + + node->type = ACPI_IORT_NODE_PCI_ROOT_COMPLEX; + node->revision = 2; + + node->length = sizeof(struct acpi_iort_node); + node->length += sizeof(struct acpi_iort_rc); + node->length += sizeof(struct acpi_iort_id_mapping) * num_mappings; + + rc = (struct acpi_iort_rc *)node->node_data; + rc->mem_access_properties = mem_access_properties; + rc->ats_attributes = ats_attributes; + rc->pci_segment_number = pci_segment_number; + rc->memory_address_size_limit = memory_address_size_limit; + + mapping = (struct acpi_iort_id_mapping *)(rc + 1); + for (int i = 0; i < num_mappings; i++) { + memcpy(mapping, &map[i], sizeof(struct acpi_iort_id_mapping)); + mapping++; + } + + ctx->current += node->length; + + return offset; +} + +int acpi_iort_add_smmu_v3(struct acpi_ctx *ctx, + const u64 base_address, + const u32 flags, + const u64 vatos_address, + const u32 model, + const u32 event_gsiv, + const u32 pri_gsiv, + const u32 gerr_gsiv, + const u32 sync_gsiv, + const u32 pxm, + const u32 id_mapping_index, + const int num_mappings, + const struct acpi_iort_id_mapping *map) +{ + struct acpi_iort_node *node; + struct acpi_iort_smmu_v3 *smmu; + struct acpi_iort_id_mapping *mapping; + int offset; + + offset = ctx->current - ctx->tab_start; + + node = ctx->current; + memset(node, '\0', sizeof(struct acpi_iort_node)); + + node->type = ACPI_IORT_NODE_SMMU_V3; + node->revision = 5; + node->mapping_count = num_mappings; + node->mapping_offset = sizeof(struct acpi_iort_node) + sizeof(struct acpi_iort_smmu_v3); + + node->length = sizeof(struct acpi_iort_node); + node->length += sizeof(struct acpi_iort_smmu_v3); + node->length += sizeof(struct acpi_iort_id_mapping) * num_mappings; + + smmu = (struct acpi_iort_smmu_v3 *)node->node_data; + + smmu->base_address = base_address; + smmu->flags = flags; + smmu->vatos_address = vatos_address; + smmu->model = model; + smmu->event_gsiv = event_gsiv; + smmu->pri_gsiv = pri_gsiv; + smmu->gerr_gsiv = gerr_gsiv; + smmu->sync_gsiv = sync_gsiv; + smmu->pxm = pxm; + smmu->id_mapping_index = id_mapping_index; + + mapping = (struct acpi_iort_id_mapping *)(smmu + 1); + for (int i = 0; i < num_mappings; i++) { + memcpy(mapping, &map[i], sizeof(struct acpi_iort_id_mapping)); + mapping++; + } + + ctx->current += node->length; + + return offset; +} + +static int acpi_write_iort(struct acpi_ctx *ctx, const struct acpi_writer *entry) +{ + struct acpi_table_iort *iort; + struct acpi_iort_node *node; + u32 offset; + int ret; + + iort = ctx->current; + ctx->tab_start = ctx->current; + memset(iort, '\0', sizeof(struct acpi_table_iort)); + + acpi_fill_header(&iort->header, "IORT"); + iort->header.revision = 1; + iort->header.creator_revision = 1; + iort->header.length = sizeof(struct acpi_table_iort); + iort->node_offset = sizeof(struct acpi_table_iort); + + acpi_inc(ctx, sizeof(struct acpi_table_iort)); + + offset = sizeof(struct acpi_table_iort); + ret = acpi_fill_iort(ctx); + if (ret) { + ctx->current = iort; + return log_msg_ret("fill", ret); + } + + /* Count nodes filled in */ + for (node = (void *)iort + iort->node_offset; + node->length > 0 && (void *)node < ctx->current; + node = (void *)node + node->length) + iort->node_count++; + + /* (Re)calculate length and checksum */ + iort->header.length = ctx->current - (void *)iort; + iort->header.checksum = table_compute_checksum((void *)iort, iort->header.length); + log_debug("IORT at %p, length %x\n", iort, iort->header.length); + + /* Drop the table if it is empty */ + if (iort->header.length == sizeof(struct acpi_table_iort)) + return log_msg_ret("fill", -ENOENT); + acpi_add_table(ctx, iort); + + return 0; +} + +ACPI_WRITER(5iort, "IORT", acpi_write_iort, 0);