/*
 * Copyright © 2014 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */
#ifndef _INTEL_GUC_FWIF_H
#define _INTEL_GUC_FWIF_H

#define GUC_CORE_FAMILY_GEN9            12
#define GUC_CORE_FAMILY_UNKNOWN         0x7fffffff

#define GUC_CLIENT_PRIORITY_KMD_HIGH    0
#define GUC_CLIENT_PRIORITY_HIGH        1
#define GUC_CLIENT_PRIORITY_KMD_NORMAL  2
#define GUC_CLIENT_PRIORITY_NORMAL      3
#define GUC_CLIENT_PRIORITY_NUM         4

#define GUC_MAX_STAGE_DESCRIPTORS       1024
#define GUC_INVALID_STAGE_ID            GUC_MAX_STAGE_DESCRIPTORS

#define GUC_RENDER_ENGINE               0
#define GUC_VIDEO_ENGINE                1
#define GUC_BLITTER_ENGINE              2
#define GUC_VIDEOENHANCE_ENGINE         3
#define GUC_VIDEO_ENGINE2               4
#define GUC_MAX_ENGINES_NUM             (GUC_VIDEO_ENGINE2 + 1)

/* Work queue item header definitions */
#define WQ_STATUS_ACTIVE                1
#define WQ_STATUS_SUSPENDED             2
#define WQ_STATUS_CMD_ERROR             3
#define WQ_STATUS_ENGINE_ID_NOT_USED    4
#define WQ_STATUS_SUSPENDED_FROM_RESET  5
#define WQ_TYPE_SHIFT                   0
#define   WQ_TYPE_BATCH_BUF             (0x1 << WQ_TYPE_SHIFT)
#define   WQ_TYPE_PSEUDO                (0x2 << WQ_TYPE_SHIFT)
#define   WQ_TYPE_INORDER               (0x3 << WQ_TYPE_SHIFT)
#define WQ_TARGET_SHIFT                 10
#define WQ_LEN_SHIFT                    16
#define WQ_NO_WCFLUSH_WAIT              (1 << 27)
#define WQ_PRESENT_WORKLOAD             (1 << 28)
#define WQ_WORKLOAD_SHIFT               29
#define   WQ_WORKLOAD_GENERAL           (0 << WQ_WORKLOAD_SHIFT)
#define   WQ_WORKLOAD_GPGPU             (1 << WQ_WORKLOAD_SHIFT)
#define   WQ_WORKLOAD_TOUCH             (2 << WQ_WORKLOAD_SHIFT)

#define WQ_RING_TAIL_SHIFT              20
#define WQ_RING_TAIL_MAX                0x7FF   /* 2^11 QWords */
#define WQ_RING_TAIL_MASK               (WQ_RING_TAIL_MAX << WQ_RING_TAIL_SHIFT)

#define GUC_DOORBELL_ENABLED            1
#define GUC_DOORBELL_DISABLED           0

#define GUC_STAGE_DESC_ATTR_ACTIVE      BIT(0)
#define GUC_STAGE_DESC_ATTR_PENDING_DB  BIT(1)
#define GUC_STAGE_DESC_ATTR_KERNEL      BIT(2)
#define GUC_STAGE_DESC_ATTR_PREEMPT     BIT(3)
#define GUC_STAGE_DESC_ATTR_RESET       BIT(4)
#define GUC_STAGE_DESC_ATTR_WQLOCKED    BIT(5)
#define GUC_STAGE_DESC_ATTR_PCH         BIT(6)
#define GUC_STAGE_DESC_ATTR_TERMINATED  BIT(7)

/* The guc control data is 10 DWORDs */
#define GUC_CTL_CTXINFO                 0
#define   GUC_CTL_CTXNUM_IN16_SHIFT     0
#define   GUC_CTL_BASE_ADDR_SHIFT       12

#define GUC_CTL_ARAT_HIGH               1
#define GUC_CTL_ARAT_LOW                2

#define GUC_CTL_DEVICE_INFO             3
#define   GUC_CTL_GTTYPE_SHIFT          0
#define   GUC_CTL_COREFAMILY_SHIFT      7

#define GUC_CTL_LOG_PARAMS              4
#define   GUC_LOG_VALID                 (1 << 0)
#define   GUC_LOG_NOTIFY_ON_HALF_FULL   (1 << 1)
#define   GUC_LOG_ALLOC_IN_MEGABYTE     (1 << 3)
#define   GUC_LOG_CRASH_PAGES           1
#define   GUC_LOG_CRASH_SHIFT           4
#define   GUC_LOG_DPC_PAGES             7
#define   GUC_LOG_DPC_SHIFT             6
#define   GUC_LOG_ISR_PAGES             7
#define   GUC_LOG_ISR_SHIFT             9
#define   GUC_LOG_BUF_ADDR_SHIFT        12

#define GUC_CTL_PAGE_FAULT_CONTROL      5

#define GUC_CTL_WA                      6
#define   GUC_CTL_WA_UK_BY_DRIVER       (1 << 3)

#define GUC_CTL_FEATURE                 7
#define   GUC_CTL_VCS2_ENABLED          (1 << 0)
#define   GUC_CTL_KERNEL_SUBMISSIONS    (1 << 1)
#define   GUC_CTL_FEATURE2              (1 << 2)
#define   GUC_CTL_POWER_GATING          (1 << 3)
#define   GUC_CTL_DISABLE_SCHEDULER     (1 << 4)
#define   GUC_CTL_PREEMPTION_LOG        (1 << 5)
#define   GUC_CTL_ENABLE_SLPC           (1 << 7)
#define   GUC_CTL_RESET_ON_PREMPT_FAILURE       (1 << 8)

#define GUC_CTL_DEBUG                   8
#define   GUC_LOG_VERBOSITY_SHIFT       0
#define   GUC_LOG_VERBOSITY_LOW         (0 << GUC_LOG_VERBOSITY_SHIFT)
#define   GUC_LOG_VERBOSITY_MED         (1 << GUC_LOG_VERBOSITY_SHIFT)
#define   GUC_LOG_VERBOSITY_HIGH        (2 << GUC_LOG_VERBOSITY_SHIFT)
#define   GUC_LOG_VERBOSITY_ULTRA       (3 << GUC_LOG_VERBOSITY_SHIFT)
/* Verbosity range-check limits, without the shift */
#define   GUC_LOG_VERBOSITY_MIN         0
#define   GUC_LOG_VERBOSITY_MAX         3
#define   GUC_LOG_VERBOSITY_MASK        0x0000000f
#define   GUC_LOG_DESTINATION_MASK      (3 << 4)
#define   GUC_LOG_DISABLED              (1 << 6)
#define   GUC_PROFILE_ENABLED           (1 << 7)
#define   GUC_WQ_TRACK_ENABLED          (1 << 8)
#define   GUC_ADS_ENABLED               (1 << 9)
#define   GUC_DEBUG_RESERVED            (1 << 10)
#define   GUC_ADS_ADDR_SHIFT            11
#define   GUC_ADS_ADDR_MASK             0xfffff800

#define GUC_CTL_RSRVD                   9

#define GUC_CTL_MAX_DWORDS              (SOFT_SCRATCH_COUNT - 2) /* [1..14] */

/**
 * DOC: GuC Firmware Layout
 *
 * The GuC firmware layout looks like this:
 *
 *     +-------------------------------+
 *     |         uc_css_header         |
 *     |                               |
 *     | contains major/minor version  |
 *     +-------------------------------+
 *     |             uCode             |
 *     +-------------------------------+
 *     |         RSA signature         |
 *     +-------------------------------+
 *     |          modulus key          |
 *     +-------------------------------+
 *     |          exponent val         |
 *     +-------------------------------+
 *
 * The firmware may or may not have modulus key and exponent data. The header,
 * uCode and RSA signature are must-have components that will be used by driver.
 * Length of each components, which is all in dwords, can be found in header.
 * In the case that modulus and exponent are not present in fw, a.k.a truncated
 * image, the length value still appears in header.
 *
 * Driver will do some basic fw size validation based on the following rules:
 *
 * 1. Header, uCode and RSA are must-have components.
 * 2. All firmware components, if they present, are in the sequence illustrated
 *    in the layout table above.
 * 3. Length info of each component can be found in header, in dwords.
 * 4. Modulus and exponent key are not required by driver. They may not appear
 *    in fw. So driver will load a truncated firmware in this case.
 *
 * HuC firmware layout is same as GuC firmware.
 *
 * HuC firmware css header is different. However, the only difference is where
 * the version information is saved. The uc_css_header is unified to support
 * both. Driver should get HuC version from uc_css_header.huc_sw_version, while
 * uc_css_header.guc_sw_version for GuC.
 */

struct uc_css_header {
        uint32_t module_type;
        /* header_size includes all non-uCode bits, including css_header, rsa
         * key, modulus key and exponent data. */
        uint32_t header_size_dw;
        uint32_t header_version;
        uint32_t module_id;
        uint32_t module_vendor;
        union {
                struct {
                        uint8_t day;
                        uint8_t month;
                        uint16_t year;
                };
                uint32_t date;
        };
        uint32_t size_dw; /* uCode plus header_size_dw */
        uint32_t key_size_dw;
        uint32_t modulus_size_dw;
        uint32_t exponent_size_dw;
        union {
                struct {
                        uint8_t hour;
                        uint8_t min;
                        uint16_t sec;
                };
                uint32_t time;
        };

        char username[8];
        char buildnumber[12];
        union {
                struct {
                        uint32_t branch_client_version;
                        uint32_t sw_version;
        } guc;
                struct {
                        uint32_t sw_version;
                        uint32_t reserved;
        } huc;
        };
        uint32_t prod_preprod_fw;
        uint32_t reserved[12];
        uint32_t header_info;
} __packed;

struct guc_doorbell_info {
        u32 db_status;
        u32 cookie;
        u32 reserved[14];
} __packed;

union guc_doorbell_qw {
        struct {
                u32 db_status;
                u32 cookie;
        };
        u64 value_qw;
} __packed;

#define GUC_NUM_DOORBELLS       256
#define GUC_DOORBELL_INVALID    (GUC_NUM_DOORBELLS)

#define GUC_DB_SIZE                     (PAGE_SIZE)
#define GUC_WQ_SIZE                     (PAGE_SIZE * 2)

/* Work item for submitting workloads into work queue of GuC. */
struct guc_wq_item {
        u32 header;
        u32 context_desc;
        u32 submit_element_info;
        u32 fence_id;
} __packed;

struct guc_process_desc {
        u32 stage_id;
        u64 db_base_addr;
        u32 head;
        u32 tail;
        u32 error_offset;
        u64 wq_base_addr;
        u32 wq_size_bytes;
        u32 wq_status;
        u32 engine_presence;
        u32 priority;
        u32 reserved[30];
} __packed;

/* engine id and context id is packed into guc_execlist_context.context_id*/
#define GUC_ELC_CTXID_OFFSET            0
#define GUC_ELC_ENGINE_OFFSET           29

/* The execlist context including software and HW information */
struct guc_execlist_context {
        u32 context_desc;
        u32 context_id;
        u32 ring_status;
        u32 ring_lrca;
        u32 ring_begin;
        u32 ring_end;
        u32 ring_next_free_location;
        u32 ring_current_tail_pointer_value;
        u8 engine_state_submit_value;
        u8 engine_state_wait_value;
        u16 pagefault_count;
        u16 engine_submit_queue_count;
} __packed;

/*
 * This structure describes a stage set arranged for a particular communication
 * between uKernel (GuC) and Driver (KMD). Technically, this is known as a
 * "GuC Context descriptor" in the specs, but we use the term "stage descriptor"
 * to avoid confusion with all the other things already named "context" in the
 * driver. A static pool of these descriptors are stored inside a GEM object
 * (stage_desc_pool) which is held for the entire lifetime of our interaction
 * with the GuC, being allocated before the GuC is loaded with its firmware.
 */
struct guc_stage_desc {
        u32 sched_common_area;
        u32 stage_id;
        u32 pas_id;
        u8 engines_used;
        u64 db_trigger_cpu;
        u32 db_trigger_uk;
        u64 db_trigger_phy;
        u16 db_id;

        struct guc_execlist_context lrc[GUC_MAX_ENGINES_NUM];

        u8 attribute;

        u32 priority;

        u32 wq_sampled_tail_offset;
        u32 wq_total_submit_enqueues;

        u32 process_desc;
        u32 wq_addr;
        u32 wq_size;

        u32 engine_presence;

        u8 engine_suspended;

        u8 reserved0[3];
        u64 reserved1[1];

        u64 desc_private;
} __packed;

/*
 * Describes single command transport buffer.
 * Used by both guc-master and clients.
 */
struct guc_ct_buffer_desc {
        u32 addr;               /* gfx address */
        u64 host_private;       /* host private data */
        u32 size;               /* size in bytes */
        u32 head;               /* offset updated by GuC*/
        u32 tail;               /* offset updated by owner */
        u32 is_in_error;        /* error indicator */
        u32 fence;              /* fence updated by GuC */
        u32 status;             /* status updated by GuC */
        u32 owner;              /* id of the channel owner */
        u32 owner_sub_id;       /* owner-defined field for extra tracking */
        u32 reserved[5];
} __packed;

/* Type of command transport buffer */
#define INTEL_GUC_CT_BUFFER_TYPE_SEND   0x0u
#define INTEL_GUC_CT_BUFFER_TYPE_RECV   0x1u

/*
 * Definition of the command transport message header (DW0)
 *
 * bit[4..0]    message len (in dwords)
 * bit[7..5]    reserved
 * bit[8]       write fence to desc
 * bit[9]       write status to H2G buff
 * bit[10]      send status (via G2H)
 * bit[15..11]  reserved
 * bit[31..16]  action code
 */
#define GUC_CT_MSG_LEN_SHIFT                    0
#define GUC_CT_MSG_LEN_MASK                     0x1F
#define GUC_CT_MSG_WRITE_FENCE_TO_DESC          (1 << 8)
#define GUC_CT_MSG_WRITE_STATUS_TO_BUFF         (1 << 9)
#define GUC_CT_MSG_SEND_STATUS                  (1 << 10)
#define GUC_CT_MSG_ACTION_SHIFT                 16
#define GUC_CT_MSG_ACTION_MASK                  0xFFFF

#define GUC_FORCEWAKE_RENDER    (1 << 0)
#define GUC_FORCEWAKE_MEDIA     (1 << 1)

#define GUC_POWER_UNSPECIFIED   0
#define GUC_POWER_D0            1
#define GUC_POWER_D1            2
#define GUC_POWER_D2            3
#define GUC_POWER_D3            4

/* Scheduling policy settings */

/* Reset engine upon preempt failure */
#define POLICY_RESET_ENGINE             (1<<0)
/* Preempt to idle on quantum expiry */
#define POLICY_PREEMPT_TO_IDLE          (1<<1)

#define POLICY_MAX_NUM_WI               15

struct guc_policy {
        /* Time for one workload to execute. (in micro seconds) */
        u32 execution_quantum;
        u32 reserved1;

        /* Time to wait for a preemption request to completed before issuing a
         * reset. (in micro seconds). */
        u32 preemption_time;

        /* How much time to allow to run after the first fault is observed.
         * Then preempt afterwards. (in micro seconds) */
        u32 fault_time;

        u32 policy_flags;
        u32 reserved[2];
} __packed;

struct guc_policies {
        struct guc_policy policy[GUC_CLIENT_PRIORITY_NUM][GUC_MAX_ENGINES_NUM];

        /* In micro seconds. How much time to allow before DPC processing is
         * called back via interrupt (to prevent DPC queue drain starving).
         * Typically 1000s of micro seconds (example only, not granularity). */
        u32 dpc_promote_time;

        /* Must be set to take these new values. */
        u32 is_valid;

        /* Max number of WIs to process per call. A large value may keep CS
         * idle. */
        u32 max_num_work_items;

        u32 reserved[19];
} __packed;

/* GuC MMIO reg state struct */

#define GUC_REGSET_FLAGS_NONE           0x0
#define GUC_REGSET_POWERCYCLE           0x1
#define GUC_REGSET_MASKED               0x2
#define GUC_REGSET_ENGINERESET          0x4
#define GUC_REGSET_SAVE_DEFAULT_VALUE   0x8
#define GUC_REGSET_SAVE_CURRENT_VALUE   0x10

#define GUC_REGSET_MAX_REGISTERS        25
#define GUC_MMIO_WHITE_LIST_START       0x24d0
#define GUC_MMIO_WHITE_LIST_MAX         12
#define GUC_S3_SAVE_SPACE_PAGES         10

struct guc_mmio_regset {
        struct __packed {
                u32 offset;
                u32 value;
                u32 flags;
        } registers[GUC_REGSET_MAX_REGISTERS];

        u32 values_valid;
        u32 number_of_registers;
} __packed;

/* MMIO registers that are set as non privileged */
struct mmio_white_list {
        u32 mmio_start;
        u32 offsets[GUC_MMIO_WHITE_LIST_MAX];
        u32 count;
} __packed;

struct guc_mmio_reg_state {
        struct guc_mmio_regset global_reg;
        struct guc_mmio_regset engine_reg[GUC_MAX_ENGINES_NUM];
        struct mmio_white_list white_list[GUC_MAX_ENGINES_NUM];
} __packed;

/* GuC Additional Data Struct */

struct guc_ads {
        u32 reg_state_addr;
        u32 reg_state_buffer;
        u32 golden_context_lrca;
        u32 scheduler_policies;
        u32 reserved0[3];
        u32 eng_state_size[GUC_MAX_ENGINES_NUM];
        u32 reserved2[4];
} __packed;

/* GuC logging structures */

enum guc_log_buffer_type {
        GUC_ISR_LOG_BUFFER,
        GUC_DPC_LOG_BUFFER,
        GUC_CRASH_DUMP_LOG_BUFFER,
        GUC_MAX_LOG_BUFFER
};

/**
 * DOC: GuC Log buffer Layout
 *
 * Page0  +-------------------------------+
 *        |   ISR state header (32 bytes) |
 *        |      DPC state header         |
 *        |   Crash dump state header     |
 * Page1  +-------------------------------+
 *        |           ISR logs            |
 * Page9  +-------------------------------+
 *        |           DPC logs            |
 * Page17 +-------------------------------+
 *        |         Crash Dump logs       |
 *        +-------------------------------+
 *
 * Below state structure is used for coordination of retrieval of GuC firmware
 * logs. Separate state is maintained for each log buffer type.
 * read_ptr points to the location where i915 read last in log buffer and
 * is read only for GuC firmware. write_ptr is incremented by GuC with number
 * of bytes written for each log entry and is read only for i915.
 * When any type of log buffer becomes half full, GuC sends a flush interrupt.
 * GuC firmware expects that while it is writing to 2nd half of the buffer,
 * first half would get consumed by Host and then get a flush completed
 * acknowledgment from Host, so that it does not end up doing any overwrite
 * causing loss of logs. So when buffer gets half filled & i915 has requested
 * for interrupt, GuC will set flush_to_file field, set the sampled_write_ptr
 * to the value of write_ptr and raise the interrupt.
 * On receiving the interrupt i915 should read the buffer, clear flush_to_file
 * field and also update read_ptr with the value of sample_write_ptr, before
 * sending an acknowledgment to GuC. marker & version fields are for internal
 * usage of GuC and opaque to i915. buffer_full_cnt field is incremented every
 * time GuC detects the log buffer overflow.
 */
struct guc_log_buffer_state {
        u32 marker[2];
        u32 read_ptr;
        u32 write_ptr;
        u32 size;
        u32 sampled_write_ptr;
        union {
                struct {
                        u32 flush_to_file:1;
                        u32 buffer_full_cnt:4;
                        u32 reserved:27;
                };
                u32 flags;
        };
        u32 version;
} __packed;

union guc_log_control {
        struct {
                u32 logging_enabled:1;
                u32 reserved1:3;
                u32 verbosity:4;
                u32 reserved2:24;
        };
        u32 value;
} __packed;

/* This Action will be programmed in C180 - SOFT_SCRATCH_O_REG */
enum intel_guc_action {
        INTEL_GUC_ACTION_DEFAULT = 0x0,
        INTEL_GUC_ACTION_SAMPLE_FORCEWAKE = 0x6,
        INTEL_GUC_ACTION_ALLOCATE_DOORBELL = 0x10,
        INTEL_GUC_ACTION_DEALLOCATE_DOORBELL = 0x20,
        INTEL_GUC_ACTION_LOG_BUFFER_FILE_FLUSH_COMPLETE = 0x30,
        INTEL_GUC_ACTION_FORCE_LOG_BUFFER_FLUSH = 0x302,
        INTEL_GUC_ACTION_ENTER_S_STATE = 0x501,
        INTEL_GUC_ACTION_EXIT_S_STATE = 0x502,
        INTEL_GUC_ACTION_SLPC_REQUEST = 0x3003,
        INTEL_GUC_ACTION_AUTHENTICATE_HUC = 0x4000,
        INTEL_GUC_ACTION_REGISTER_COMMAND_TRANSPORT_BUFFER = 0x4505,
        INTEL_GUC_ACTION_DEREGISTER_COMMAND_TRANSPORT_BUFFER = 0x4506,
        INTEL_GUC_ACTION_UK_LOG_ENABLE_LOGGING = 0x0E000,
        INTEL_GUC_ACTION_LIMIT
};

/*
 * The GuC sends its response to a command by overwriting the
 * command in SS0. The response is distinguishable from a command
 * by the fact that all the MASK bits are set. The remaining bits
 * give more detail.
 */
#define INTEL_GUC_RECV_MASK     ((u32)0xF0000000)
#define INTEL_GUC_RECV_IS_RESPONSE(x)   ((u32)(x) >= INTEL_GUC_RECV_MASK)
#define INTEL_GUC_RECV_STATUS(x)        (INTEL_GUC_RECV_MASK | (x))

/* GUC will return status back to SOFT_SCRATCH_O_REG */
enum intel_guc_status {
        INTEL_GUC_STATUS_SUCCESS = INTEL_GUC_RECV_STATUS(0x0),
        INTEL_GUC_STATUS_ALLOCATE_DOORBELL_FAIL = INTEL_GUC_RECV_STATUS(0x10),
        INTEL_GUC_STATUS_DEALLOCATE_DOORBELL_FAIL = INTEL_GUC_RECV_STATUS(0x20),
        INTEL_GUC_STATUS_GENERIC_FAIL = INTEL_GUC_RECV_STATUS(0x0000F000)
};

/* This action will be programmed in C1BC - SOFT_SCRATCH_15_REG */
enum intel_guc_recv_message {
        INTEL_GUC_RECV_MSG_CRASH_DUMP_POSTED = BIT(1),
        INTEL_GUC_RECV_MSG_FLUSH_LOG_BUFFER = BIT(3)
};

#endif