diff options
Diffstat (limited to 'src/acpi/acpigen_pci.c')
| -rw-r--r-- | src/acpi/acpigen_pci.c | 305 |
1 files changed, 0 insertions, 305 deletions
diff --git a/src/acpi/acpigen_pci.c b/src/acpi/acpigen_pci.c index a23b84c39f7d..3edf0d034249 100644 --- a/src/acpi/acpigen_pci.c +++ b/src/acpi/acpigen_pci.c @@ -55,308 +55,3 @@ void acpigen_write_PRT_source_entry(unsigned int pci_dev, unsigned int acpi_pin, acpigen_pop_len(); /* Package */ } - -#define PCI_HOST_BRIDGE_OSC_UUID "33db4d5b-1ff7-401c-9657-7441c03dd766" -#define CXL_HOST_BRIDGE_OSC_UUID "68f2d50b-c469-4d8a-bd3d-941a103fd3fc" - -#define OSC_RET_FAILURE 0x02 -#define OSC_RET_UNRECOGNIZED_UUID 0x04 -#define OSC_RET_UNRECOGNIZED_REV 0x08 -#define OSC_RET_CAPABILITIES_MASKED 0x10 - -#define OSC_QUERY_SUPPORT_SET 0x01 - -#define ASL_UUID_UNHANDLED 0x00 -#define ASL_UUID_HANDLED 0x01 - -static void acpigen_OSC_handle_pcie_request(const struct device *domain); -static void acpigen_OSC_handle_cxl_request(const struct device *domain); - -/* - * acpigen_write_OSC_pci_domain - * - * Reference: - * 6.2.11 in https://uefi.org/htmlspecs/ACPI_Spec_6_4_html/06_Device_Configuration/Device_Configuration.html - * - * _OSC ASL Arguments: (4) - * Arg0 - A Buffer containing a UUID - * Arg1 - An Integer containing a Revision ID of the buffer format - * Arg2 - An Integer containing a count of entries in Arg3 - * Arg3 - A Buffer containing a list of DWORD capabilities - * - * _OSC ASL Return Value: - * A Buffer containing a list of capabilities - * - * Local Variables Assignment: - * Local0 - Temp assigned - * Local1 - Temp assigned - * Local2 - Not used - * Local3 - Not used - * Local4 - Not used - * Local5 - Not used - * Local6 - Record whether the UUID is handled - * Local7 - Backs up the input value of Arg3 - * - * Field Definitions: - * Name - Width Source Offset Description - * -------------------------------- - * QSUP - DWord Local7 0x00 Query support - * RETE - DWord Arg3 0x00 Returned errors - * SUPP - Dword Arg3 0x04 PCIe Features that OS supported - * CTRL - Dword Arg3 0x08 PCIe Features that firmware grant control to OS - * OTRL - Dword Local7 0x08 PCIe Features that OS requests for control - * SUPC - Dword Arg3 0x0C CXL Features that OS supported - * CTRC - Dword Arg3 0x10 CXL Features that firmware grant control to OS - * OTRC - Dword Local7 0x10 CXL Features that OS requests for control - */ -void acpigen_write_OSC_pci_domain(const struct device *domain, const bool is_cxl_domain) -{ - /* - * Method (_OSC, 4, NotSerialized) - * { - */ - acpigen_write_method("_OSC", 4); - - /* - * // - * // Check revision ID - * // - * If (Arg1 != 1) - * { - * RETE = OSC_RET_UNRECOGNIZED_REV - * Return (Arg3) - * } - */ - acpigen_write_if(); - acpigen_emit_byte(LNOT_OP); - acpigen_emit_byte(LEQUAL_OP); - acpigen_emit_byte(ARG1_OP); - acpigen_write_integer(0x1); - - acpigen_write_store_int_to_namestr(OSC_RET_UNRECOGNIZED_REV, "RETE"); - acpigen_write_return_op(ARG3_OP); - - acpigen_write_if_end(); - - /* - * // - * // Setup up local variables - * // - * Local7 = Arg3 - * CreateDwordField (Local7, 0x00, QSUP) - * CreateDWordField (Arg3, 0x00, RETE) - * RETE = 0x0 - * Local6 = ASL_UUID_UNHANDLED - */ - acpigen_write_store_ops(ARG3_OP, LOCAL7_OP); - acpigen_write_create_dword_field(LOCAL7_OP, 0x00, "QSUP"); - acpigen_write_create_dword_field(ARG3_OP, 0x00, "RETE"); - acpigen_write_store_int_to_namestr(0x0, "RETE"); - acpigen_write_store_int_to_op(ASL_UUID_UNHANDLED, LOCAL6_OP); - - /* - * // - * // Refer to CXL-3.1-Specification, 9.18.2 - * // A CXL Host Bridge also originates a PCIe hierarchy and will have a - * // _CID of EISAID("PNP0A08"). As such, a CXL Host Bridge device may expose - * // both CXL _OSC and PCIe _OSC. - * // - * - * If (Arg0 == ToUUID (PCI_HOST_BRIDGE_OSC_UUID)) - * { - * // - * // Handle PCIe _OSC request - * // Mark UUID handled - * // - * } - */ - acpigen_write_if(); - acpigen_emit_byte(LEQUAL_OP); - acpigen_emit_byte(ARG0_OP); - acpigen_write_uuid(PCI_HOST_BRIDGE_OSC_UUID); - - acpigen_OSC_handle_pcie_request(domain); - acpigen_write_store_int_to_op(ASL_UUID_HANDLED, LOCAL6_OP); - - acpigen_write_if_end(); - - if (is_cxl_domain) { - /* - * If (Arg0 == ToUUID (CXL_HOST_BRIDGE_OSC_UUID)) - * { - * // - * // Handle CXL _OSC request - * // Mark UUID handled - * // - * } - */ - acpigen_write_if(); - acpigen_emit_byte(LEQUAL_OP); - acpigen_emit_byte(ARG0_OP); - acpigen_write_uuid(CXL_HOST_BRIDGE_OSC_UUID); - - acpigen_OSC_handle_cxl_request(domain); - acpigen_write_store_int_to_op(ASL_UUID_HANDLED, LOCAL6_OP); - - acpigen_write_if_end(); - } - - /* - * // - * // Handle unrecognized UUID - * // - * If (Local6 == ASL_UUID_UNHANDLED) - * { - * RETE = OSC_RET_UNRECOGNIZED_UUID - * } - */ - acpigen_write_if_lequal_op_int(LOCAL6_OP, ASL_UUID_UNHANDLED); - acpigen_write_store_int_to_namestr(OSC_RET_UNRECOGNIZED_UUID, "RETE"); - acpigen_write_if_end(); - - /* - * // - * // All done, return - * // - * Return (Arg3) - */ - acpigen_write_return_op(ARG3_OP); - - /* - * } // Method (_OSC, 4, NotSerialized) - */ - acpigen_pop_len(); - -} - -void acpigen_OSC_handle_pcie_request(const struct device *domain) -{ - uint32_t osc_features = soc_get_granted_pci_features(domain); - - /* - * If (Arg2 < 2)) - * { - * RETE = OSC_RET_FAILURE - * Return (Arg3) - * } - */ - acpigen_write_if(); - acpigen_emit_byte(LLESS_OP); - acpigen_emit_byte(ARG2_OP); - acpigen_write_integer(0x2); - - acpigen_write_store_int_to_namestr(OSC_RET_FAILURE, "RETE"); - acpigen_write_return_op(ARG3_OP); - - acpigen_write_if_end(); - - /* - * CreateDWordField (Arg3, 0x04, SUPP) - * CreateDWordField (Arg3, 0x08, CTRL) - * CreateDWordField (Local7, 0x08, OTRL) - */ - acpigen_write_create_dword_field(ARG3_OP, 0x04, "SUPP"); - acpigen_write_create_dword_field(ARG3_OP, 0x08, "CTRL"); - acpigen_write_create_dword_field(LOCAL7_OP, 0x08, "OTRL"); - - /* - * // Grant PCIe feature controls to OS - * CTRL &= osc_features - */ - acpigen_write_to_integer_from_namestring("CTRL", LOCAL0_OP); - acpigen_write_store_int_to_op(osc_features, LOCAL1_OP); - acpigen_write_and(LOCAL0_OP, LOCAL1_OP, LOCAL0_OP); - acpigen_write_store_op_to_namestr(LOCAL0_OP, "CTRL"); - - /* - * If (CTRL != OTRL) - * { - * RETE = OSC_RET_CAPABILITIES_MASKED - * } - */ - acpigen_write_if(); - acpigen_emit_byte(LNOT_OP); - acpigen_emit_byte(LEQUAL_OP); - acpigen_emit_namestring("CTRL"); - acpigen_emit_namestring("OTRL"); - acpigen_write_store_int_to_namestr(OSC_RET_CAPABILITIES_MASKED, "RETE"); - acpigen_write_if_end(); -}; - -void acpigen_OSC_handle_cxl_request(const struct device *domain) -{ - uint32_t osc_features = soc_get_granted_cxl_features(domain); - - /* - * If (Arg2 < 4)) - * { - * RETE = OSC_RET_FAILURE - * Return (Arg3) - * } - */ - acpigen_write_if(); - acpigen_emit_byte(LLESS_OP); - acpigen_emit_byte(ARG2_OP); - acpigen_write_integer(0x4); - - acpigen_write_store_int_to_namestr(OSC_RET_FAILURE, "RETE"); - acpigen_write_return_op(ARG3_OP); - - acpigen_write_if_end(); - - /* - * CreateDWordField (Arg3, 0x0C, SUPC) - * CreateDWordField (Arg3, 0x10, CTRC) - * CreateDWordField (Local7, 0x10, OTRC) - */ - acpigen_write_create_dword_field(ARG3_OP, 0x0C, "SUPC"); - acpigen_write_create_dword_field(ARG3_OP, 0x10, "CTRC"); - acpigen_write_create_dword_field(LOCAL7_OP, 0x10, "OTRC"); - - /* - * // Grant CXL feature controls to OS - * CTRC &= osc_features - */ - acpigen_write_to_integer_from_namestring("CTRC", LOCAL0_OP); - acpigen_write_store_int_to_op(osc_features, LOCAL1_OP); - acpigen_write_and(LOCAL0_OP, LOCAL1_OP, LOCAL0_OP); - acpigen_write_store_op_to_namestr(LOCAL0_OP, "CTRC"); - - /* - * If (CTRC != OTRC) - * { - * RETE = OSC_RET_CAPABILITIES_MASKED - * } - */ - acpigen_write_if(); - acpigen_emit_byte(LNOT_OP); - acpigen_emit_byte(LEQUAL_OP); - acpigen_emit_namestring("CTRC"); - acpigen_emit_namestring("OTRC"); - acpigen_write_store_int_to_namestr(OSC_RET_CAPABILITIES_MASKED, "RETE"); - acpigen_write_if_end(); -}; - -__weak uint32_t soc_get_granted_pci_features(const struct device *domain) -{ - /* - * By default grant no features to OS, which equals to the case where _OSC - * is absent. - * - * Refer to PCI firmware specification, revision 3.1. - * If the _OSC control method is absent from the scope of a host bridge device, then - * the operating system must not enable or attempt to use any features defined in this - * section for the hierarchy originated by the host bridge. Doing so could contend with - * platform firmware operations or produce undesired results. - */ - return 0; -} - -__weak uint32_t soc_get_granted_cxl_features(const struct device *domain) -{ - /* - * By default grant no features to OS, which equals to the case where _OSC - * is absent. - */ - return 0; -} |