/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2021 Microsoft Corp. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #ifndef _GDMA_H #define _GDMA_H #include <sys/bus.h> #include <sys/bus_dma.h> #include <sys/types.h> #include <sys/limits.h> #include <sys/sx.h> #include "gdma_util.h" #include "shm_channel.h" #define GDMA_STATUS_MORE_ENTRIES 0x00000105 /* Structures labeled with "HW DATA" are exchanged with the hardware. All of * them are naturally aligned and hence don't need __packed. */ #define GDMA_BAR0 0 #define GDMA_IRQNAME_SZ 40 struct gdma_bus { bus_space_handle_t bar0_h; bus_space_tag_t bar0_t; }; struct gdma_msix_entry { int entry; int vector; }; enum gdma_request_type { GDMA_VERIFY_VF_DRIVER_VERSION = 1, GDMA_QUERY_MAX_RESOURCES = 2, GDMA_LIST_DEVICES = 3, GDMA_REGISTER_DEVICE = 4, GDMA_DEREGISTER_DEVICE = 5, GDMA_GENERATE_TEST_EQE = 10, GDMA_CREATE_QUEUE = 12, GDMA_DISABLE_QUEUE = 13, GDMA_ALLOCATE_RESOURCE_RANGE = 22, GDMA_DESTROY_RESOURCE_RANGE = 24, GDMA_CREATE_DMA_REGION = 25, GDMA_DMA_REGION_ADD_PAGES = 26, GDMA_DESTROY_DMA_REGION = 27, GDMA_CREATE_PD = 29, GDMA_DESTROY_PD = 30, GDMA_CREATE_MR = 31, GDMA_DESTROY_MR = 32, }; #define GDMA_RESOURCE_DOORBELL_PAGE 27 enum gdma_queue_type { GDMA_INVALID_QUEUE, GDMA_SQ, GDMA_RQ, GDMA_CQ, GDMA_EQ, }; enum gdma_work_request_flags { GDMA_WR_NONE = 0, GDMA_WR_OOB_IN_SGL = BIT(0), GDMA_WR_PAD_BY_SGE0 = BIT(1), }; enum gdma_eqe_type { GDMA_EQE_COMPLETION = 3, GDMA_EQE_TEST_EVENT = 64, GDMA_EQE_HWC_INIT_EQ_ID_DB = 129, GDMA_EQE_HWC_INIT_DATA = 130, GDMA_EQE_HWC_INIT_DONE = 131, }; enum { GDMA_DEVICE_NONE = 0, GDMA_DEVICE_HWC = 1, GDMA_DEVICE_MANA = 2, }; typedef uint64_t gdma_obj_handle_t; struct gdma_resource { /* Protect the bitmap */ struct mtx lock_spin; /* The bitmap size in bits. */ uint32_t size; /* The bitmap tracks the resources. */ unsigned long *map; }; union gdma_doorbell_entry { uint64_t as_uint64; struct { uint64_t id : 24; uint64_t reserved : 8; uint64_t tail_ptr : 31; uint64_t arm : 1; } cq; struct { uint64_t id : 24; uint64_t wqe_cnt : 8; uint64_t tail_ptr : 32; } rq; struct { uint64_t id : 24; uint64_t reserved : 8; uint64_t tail_ptr : 32; } sq; struct { uint64_t id : 16; uint64_t reserved : 16; uint64_t tail_ptr : 31; uint64_t arm : 1; } eq; }; /* HW DATA */ struct gdma_msg_hdr { uint32_t hdr_type; uint32_t msg_type; uint16_t msg_version; uint16_t hwc_msg_id; uint32_t msg_size; }; /* HW DATA */ struct gdma_dev_id { union { struct { uint16_t type; uint16_t instance; }; uint32_t as_uint32; }; }; /* HW DATA */ struct gdma_req_hdr { struct gdma_msg_hdr req; struct gdma_msg_hdr resp; /* The expected response */ struct gdma_dev_id dev_id; uint32_t activity_id; }; /* HW DATA */ struct gdma_resp_hdr { struct gdma_msg_hdr response; struct gdma_dev_id dev_id; uint32_t activity_id; uint32_t status; uint32_t reserved; }; /* HW DATA */ struct gdma_general_req { struct gdma_req_hdr hdr; }; /* HW DATA */ #define GDMA_MESSAGE_V1 1 struct gdma_general_resp { struct gdma_resp_hdr hdr; }; /* HW DATA */ #define GDMA_STANDARD_HEADER_TYPE 0 static inline void mana_gd_init_req_hdr(struct gdma_req_hdr *hdr, uint32_t code, uint32_t req_size, uint32_t resp_size) { hdr->req.hdr_type = GDMA_STANDARD_HEADER_TYPE; hdr->req.msg_type = code; hdr->req.msg_version = GDMA_MESSAGE_V1; hdr->req.msg_size = req_size; hdr->resp.hdr_type = GDMA_STANDARD_HEADER_TYPE; hdr->resp.msg_type = code; hdr->resp.msg_version = GDMA_MESSAGE_V1; hdr->resp.msg_size = resp_size; } /* The 16-byte struct is part of the GDMA work queue entry (WQE). */ struct gdma_sge { uint64_t address; uint32_t mem_key; uint32_t size; }; /* HW DATA */ struct gdma_wqe_request { struct gdma_sge *sgl; uint32_t num_sge; uint32_t inline_oob_size; const void *inline_oob_data; uint32_t flags; uint32_t client_data_unit; }; enum gdma_page_type { GDMA_PAGE_TYPE_4K, }; #define GDMA_INVALID_DMA_REGION 0 struct gdma_mem_info { device_t dev; bus_dma_tag_t dma_tag; bus_dmamap_t dma_map; bus_addr_t dma_handle; /* Physical address */ void *virt_addr; /* Virtual address */ uint64_t length; /* Allocated by the PF driver */ gdma_obj_handle_t dma_region_handle; }; #define REGISTER_ATB_MST_MKEY_LOWER_SIZE 8 struct gdma_dev { struct gdma_context *gdma_context; struct gdma_dev_id dev_id; uint32_t pdid; uint32_t doorbell; uint32_t gpa_mkey; /* GDMA driver specific pointer */ void *driver_data; }; #define MINIMUM_SUPPORTED_PAGE_SIZE PAGE_SIZE #define GDMA_CQE_SIZE 64 #define GDMA_EQE_SIZE 16 #define GDMA_MAX_SQE_SIZE 512 #define GDMA_MAX_RQE_SIZE 256 #define GDMA_COMP_DATA_SIZE 0x3C #define GDMA_EVENT_DATA_SIZE 0xC /* The WQE size must be a multiple of the Basic Unit, which is 32 bytes. */ #define GDMA_WQE_BU_SIZE 32 #define INVALID_PDID UINT_MAX #define INVALID_DOORBELL UINT_MAX #define INVALID_MEM_KEY UINT_MAX #define INVALID_QUEUE_ID UINT_MAX #define INVALID_PCI_MSIX_INDEX UINT_MAX struct gdma_comp { uint32_t cqe_data[GDMA_COMP_DATA_SIZE / 4]; uint32_t wq_num; bool is_sq; }; struct gdma_event { uint32_t details[GDMA_EVENT_DATA_SIZE / 4]; uint8_t type; }; struct gdma_queue; typedef void gdma_eq_callback(void *context, struct gdma_queue *q, struct gdma_event *e); typedef void gdma_cq_callback(void *context, struct gdma_queue *q); /* The 'head' is the producer index. For SQ/RQ, when the driver posts a WQE * (Note: the WQE size must be a multiple of the 32-byte Basic Unit), the * driver increases the 'head' in BUs rather than in bytes, and notifies * the HW of the updated head. For EQ/CQ, the driver uses the 'head' to track * the HW head, and increases the 'head' by 1 for every processed EQE/CQE. * * The 'tail' is the consumer index for SQ/RQ. After the CQE of the SQ/RQ is * processed, the driver increases the 'tail' to indicate that WQEs have * been consumed by the HW, so the driver can post new WQEs into the SQ/RQ. * * The driver doesn't use the 'tail' for EQ/CQ, because the driver ensures * that the EQ/CQ is big enough so they can't overflow, and the driver uses * the owner bits mechanism to detect if the queue has become empty. */ struct gdma_queue { struct gdma_dev *gdma_dev; enum gdma_queue_type type; uint32_t id; struct gdma_mem_info mem_info; void *queue_mem_ptr; uint32_t queue_size; bool monitor_avl_buf; uint32_t head; uint32_t tail; /* Extra fields specific to EQ/CQ. */ union { struct { bool disable_needed; gdma_eq_callback *callback; void *context; unsigned int msix_index; uint32_t log2_throttle_limit; } eq; struct { gdma_cq_callback *callback; void *context; /* For CQ/EQ relationship */ struct gdma_queue *parent; } cq; }; }; struct gdma_queue_spec { enum gdma_queue_type type; bool monitor_avl_buf; unsigned int queue_size; /* Extra fields specific to EQ/CQ. */ union { struct { gdma_eq_callback *callback; void *context; unsigned long log2_throttle_limit; } eq; struct { gdma_cq_callback *callback; void *context; struct gdma_queue *parent_eq; } cq; }; }; struct mana_eq { struct gdma_queue *eq; }; struct gdma_irq_context { struct gdma_msix_entry msix_e; struct resource *res; driver_intr_t *handler; void *arg; void *cookie; bool requested; int cpu; char name[GDMA_IRQNAME_SZ]; }; struct gdma_context { device_t dev; struct gdma_bus gd_bus; /* Per-vPort max number of queues */ unsigned int max_num_queues; unsigned int max_num_msix; unsigned int num_msix_usable; struct gdma_resource msix_resource; struct gdma_irq_context *irq_contexts; /* This maps a CQ index to the queue structure. */ unsigned int max_num_cqs; struct gdma_queue **cq_table; /* Protect eq_test_event and test_event_eq_id */ struct sx eq_test_event_sx; struct completion eq_test_event; uint32_t test_event_eq_id; struct resource *bar0; struct resource *msix; int msix_rid; void __iomem *shm_base; void __iomem *db_page_base; vm_paddr_t phys_db_page_base; uint32_t db_page_size; /* Shared memory chanenl (used to bootstrap HWC) */ struct shm_channel shm_channel; /* Hardware communication channel (HWC) */ struct gdma_dev hwc; /* Azure network adapter */ struct gdma_dev mana; }; #define MAX_NUM_GDMA_DEVICES 4 static inline bool mana_gd_is_mana(struct gdma_dev *gd) { return gd->dev_id.type == GDMA_DEVICE_MANA; } static inline bool mana_gd_is_hwc(struct gdma_dev *gd) { return gd->dev_id.type == GDMA_DEVICE_HWC; } uint8_t *mana_gd_get_wqe_ptr(const struct gdma_queue *wq, uint32_t wqe_offset); uint32_t mana_gd_wq_avail_space(struct gdma_queue *wq); int mana_gd_test_eq(struct gdma_context *gc, struct gdma_queue *eq); int mana_gd_create_hwc_queue(struct gdma_dev *gd, const struct gdma_queue_spec *spec, struct gdma_queue **queue_ptr); int mana_gd_create_mana_eq(struct gdma_dev *gd, const struct gdma_queue_spec *spec, struct gdma_queue **queue_ptr); int mana_gd_create_mana_wq_cq(struct gdma_dev *gd, const struct gdma_queue_spec *spec, struct gdma_queue **queue_ptr); void mana_gd_destroy_queue(struct gdma_context *gc, struct gdma_queue *queue); int mana_gd_poll_cq(struct gdma_queue *cq, struct gdma_comp *comp, int num_cqe); void mana_gd_ring_cq(struct gdma_queue *cq, uint8_t arm_bit); struct gdma_wqe { uint32_t reserved :24; uint32_t last_vbytes :8; union { uint32_t flags; struct { uint32_t num_sge :8; uint32_t inline_oob_size_div4 :3; uint32_t client_oob_in_sgl :1; uint32_t reserved1 :4; uint32_t client_data_unit :14; uint32_t reserved2 :2; }; }; }; /* HW DATA */ #define INLINE_OOB_SMALL_SIZE 8 #define INLINE_OOB_LARGE_SIZE 24 #define MAX_TX_WQE_SIZE 512 #define MAX_RX_WQE_SIZE 256 #define MAX_TX_WQE_SGL_ENTRIES ((GDMA_MAX_SQE_SIZE - \ sizeof(struct gdma_sge) - INLINE_OOB_SMALL_SIZE) / \ sizeof(struct gdma_sge)) #define MAX_RX_WQE_SGL_ENTRIES ((GDMA_MAX_RQE_SIZE - \ sizeof(struct gdma_sge)) / sizeof(struct gdma_sge)) struct gdma_cqe { uint32_t cqe_data[GDMA_COMP_DATA_SIZE / 4]; union { uint32_t as_uint32; struct { uint32_t wq_num :24; uint32_t is_sq :1; uint32_t reserved :4; uint32_t owner_bits :3; }; } cqe_info; }; /* HW DATA */ #define GDMA_CQE_OWNER_BITS 3 #define GDMA_CQE_OWNER_MASK ((1 << GDMA_CQE_OWNER_BITS) - 1) #define SET_ARM_BIT 1 #define GDMA_EQE_OWNER_BITS 3 union gdma_eqe_info { uint32_t as_uint32; struct { uint32_t type : 8; uint32_t reserved1 : 8; uint32_t client_id : 2; uint32_t reserved2 : 11; uint32_t owner_bits : 3; }; }; /* HW DATA */ #define GDMA_EQE_OWNER_MASK ((1 << GDMA_EQE_OWNER_BITS) - 1) #define INITIALIZED_OWNER_BIT(log2_num_entries) (1UL << (log2_num_entries)) struct gdma_eqe { uint32_t details[GDMA_EVENT_DATA_SIZE / 4]; uint32_t eqe_info; }; /* HW DATA */ #define GDMA_REG_DB_PAGE_OFFSET 8 #define GDMA_REG_DB_PAGE_SIZE 0x10 #define GDMA_REG_SHM_OFFSET 0x18 struct gdma_posted_wqe_info { uint32_t wqe_size_in_bu; }; /* GDMA_GENERATE_TEST_EQE */ struct gdma_generate_test_event_req { struct gdma_req_hdr hdr; uint32_t queue_index; }; /* HW DATA */ /* GDMA_VERIFY_VF_DRIVER_VERSION */ enum { GDMA_PROTOCOL_V1 = 1, GDMA_PROTOCOL_FIRST = GDMA_PROTOCOL_V1, GDMA_PROTOCOL_LAST = GDMA_PROTOCOL_V1, }; struct gdma_verify_ver_req { struct gdma_req_hdr hdr; /* Mandatory fields required for protocol establishment */ uint64_t protocol_ver_min; uint64_t protocol_ver_max; uint64_t drv_cap_flags1; uint64_t drv_cap_flags2; uint64_t drv_cap_flags3; uint64_t drv_cap_flags4; /* Advisory fields */ uint64_t drv_ver; uint32_t os_type; /* Linux = 0x10; Windows = 0x20; Other = 0x30 */ uint32_t reserved; uint32_t os_ver_major; uint32_t os_ver_minor; uint32_t os_ver_build; uint32_t os_ver_platform; uint64_t reserved_2; uint8_t os_ver_str1[128]; uint8_t os_ver_str2[128]; uint8_t os_ver_str3[128]; uint8_t os_ver_str4[128]; }; /* HW DATA */ struct gdma_verify_ver_resp { struct gdma_resp_hdr hdr; uint64_t gdma_protocol_ver; uint64_t pf_cap_flags1; uint64_t pf_cap_flags2; uint64_t pf_cap_flags3; uint64_t pf_cap_flags4; }; /* HW DATA */ /* GDMA_QUERY_MAX_RESOURCES */ struct gdma_query_max_resources_resp { struct gdma_resp_hdr hdr; uint32_t status; uint32_t max_sq; uint32_t max_rq; uint32_t max_cq; uint32_t max_eq; uint32_t max_db; uint32_t max_mst; uint32_t max_cq_mod_ctx; uint32_t max_mod_cq; uint32_t max_msix; }; /* HW DATA */ /* GDMA_LIST_DEVICES */ struct gdma_list_devices_resp { struct gdma_resp_hdr hdr; uint32_t num_of_devs; uint32_t reserved; struct gdma_dev_id devs[64]; }; /* HW DATA */ /* GDMA_REGISTER_DEVICE */ struct gdma_register_device_resp { struct gdma_resp_hdr hdr; uint32_t pdid; uint32_t gpa_mkey; uint32_t db_id; }; /* HW DATA */ struct gdma_allocate_resource_range_req { struct gdma_req_hdr hdr; uint32_t resource_type; uint32_t num_resources; uint32_t alignment; uint32_t allocated_resources; }; struct gdma_allocate_resource_range_resp { struct gdma_resp_hdr hdr; uint32_t allocated_resources; }; struct gdma_destroy_resource_range_req { struct gdma_req_hdr hdr; uint32_t resource_type; uint32_t num_resources; uint32_t allocated_resources; }; /* GDMA_CREATE_QUEUE */ struct gdma_create_queue_req { struct gdma_req_hdr hdr; uint32_t type; uint32_t reserved1; uint32_t pdid; uint32_t doolbell_id; gdma_obj_handle_t gdma_region; uint32_t reserved2; uint32_t queue_size; uint32_t log2_throttle_limit; uint32_t eq_pci_msix_index; uint32_t cq_mod_ctx_id; uint32_t cq_parent_eq_id; uint8_t rq_drop_on_overrun; uint8_t rq_err_on_wqe_overflow; uint8_t rq_chain_rec_wqes; uint8_t sq_hw_db; uint32_t reserved3; }; /* HW DATA */ struct gdma_create_queue_resp { struct gdma_resp_hdr hdr; uint32_t queue_index; }; /* HW DATA */ /* GDMA_DISABLE_QUEUE */ struct gdma_disable_queue_req { struct gdma_req_hdr hdr; uint32_t type; uint32_t queue_index; uint32_t alloc_res_id_on_creation; }; /* HW DATA */ enum atb_page_size { ATB_PAGE_SIZE_4K, ATB_PAGE_SIZE_8K, ATB_PAGE_SIZE_16K, ATB_PAGE_SIZE_32K, ATB_PAGE_SIZE_64K, ATB_PAGE_SIZE_128K, ATB_PAGE_SIZE_256K, ATB_PAGE_SIZE_512K, ATB_PAGE_SIZE_1M, ATB_PAGE_SIZE_2M, ATB_PAGE_SIZE_MAX, }; enum gdma_mr_access_flags { GDMA_ACCESS_FLAG_LOCAL_READ = BIT(0), GDMA_ACCESS_FLAG_LOCAL_WRITE = BIT(1), GDMA_ACCESS_FLAG_REMOTE_READ = BIT(2), GDMA_ACCESS_FLAG_REMOTE_WRITE = BIT(3), GDMA_ACCESS_FLAG_REMOTE_ATOMIC = BIT(4), }; /* GDMA_CREATE_DMA_REGION */ struct gdma_create_dma_region_req { struct gdma_req_hdr hdr; /* The total size of the DMA region */ uint64_t length; /* The offset in the first page */ uint32_t offset_in_page; /* enum gdma_page_type */ uint32_t gdma_page_type; /* The total number of pages */ uint32_t page_count; /* If page_addr_list_len is smaller than page_count, * the remaining page addresses will be added via the * message GDMA_DMA_REGION_ADD_PAGES. */ uint32_t page_addr_list_len; uint64_t page_addr_list[]; }; /* HW DATA */ struct gdma_create_dma_region_resp { struct gdma_resp_hdr hdr; gdma_obj_handle_t dma_region_handle; }; /* HW DATA */ /* GDMA_DMA_REGION_ADD_PAGES */ struct gdma_dma_region_add_pages_req { struct gdma_req_hdr hdr; gdma_obj_handle_t dma_region_handle; uint32_t page_addr_list_len; uint32_t reserved3; uint64_t page_addr_list[]; }; /* HW DATA */ /* GDMA_DESTROY_DMA_REGION */ struct gdma_destroy_dma_region_req { struct gdma_req_hdr hdr; gdma_obj_handle_t dma_region_handle; }; /* HW DATA */ enum gdma_pd_flags { GDMA_PD_FLAG_INVALID = 0, }; struct gdma_create_pd_req { struct gdma_req_hdr hdr; enum gdma_pd_flags flags; uint32_t reserved; };/* HW DATA */ struct gdma_create_pd_resp { struct gdma_resp_hdr hdr; gdma_obj_handle_t pd_handle; uint32_t pd_id; uint32_t reserved; };/* HW DATA */ struct gdma_destroy_pd_req { struct gdma_req_hdr hdr; gdma_obj_handle_t pd_handle; };/* HW DATA */ struct gdma_destory_pd_resp { struct gdma_resp_hdr hdr; };/* HW DATA */ enum gdma_mr_type { /* Guest Virtual Address - MRs of this type allow access * to memory mapped by PTEs associated with this MR using a virtual * address that is set up in the MST */ GDMA_MR_TYPE_GVA = 2, }; struct gdma_create_mr_params { gdma_obj_handle_t pd_handle; enum gdma_mr_type mr_type; union { struct { gdma_obj_handle_t dma_region_handle; uint64_t virtual_address; enum gdma_mr_access_flags access_flags; } gva; }; }; struct gdma_create_mr_request { struct gdma_req_hdr hdr; gdma_obj_handle_t pd_handle; enum gdma_mr_type mr_type; uint32_t reserved_1; union { struct { gdma_obj_handle_t dma_region_handle; uint64_t virtual_address; enum gdma_mr_access_flags access_flags; } gva; }; uint32_t reserved_2; };/* HW DATA */ struct gdma_create_mr_response { struct gdma_resp_hdr hdr; gdma_obj_handle_t mr_handle; uint32_t lkey; uint32_t rkey; };/* HW DATA */ struct gdma_destroy_mr_request { struct gdma_req_hdr hdr; gdma_obj_handle_t mr_handle; };/* HW DATA */ struct gdma_destroy_mr_response { struct gdma_resp_hdr hdr; };/* HW DATA */ int mana_gd_verify_vf_version(device_t dev); int mana_gd_register_device(struct gdma_dev *gd); int mana_gd_deregister_device(struct gdma_dev *gd); int mana_gd_post_work_request(struct gdma_queue *wq, const struct gdma_wqe_request *wqe_req, struct gdma_posted_wqe_info *wqe_info); int mana_gd_post_and_ring(struct gdma_queue *queue, const struct gdma_wqe_request *wqe, struct gdma_posted_wqe_info *wqe_info); int mana_gd_alloc_res_map(uint32_t res_avil, struct gdma_resource *r, const char *lock_name); void mana_gd_free_res_map(struct gdma_resource *r); void mana_gd_wq_ring_doorbell(struct gdma_context *gc, struct gdma_queue *queue); int mana_gd_alloc_memory(struct gdma_context *gc, unsigned int length, struct gdma_mem_info *gmi); void mana_gd_free_memory(struct gdma_mem_info *gmi); void mana_gd_dma_map_paddr(void *arg, bus_dma_segment_t *segs, int nseg, int error); int mana_gd_send_request(struct gdma_context *gc, uint32_t req_len, const void *req, uint32_t resp_len, void *resp); int mana_gd_allocate_doorbell_page(struct gdma_context *gc, int *doorbell_page); int mana_gd_destroy_doorbell_page(struct gdma_context *gc, int doorbell_page); int mana_gd_destroy_dma_region(struct gdma_context *gc, gdma_obj_handle_t dma_region_handle); #endif /* _GDMA_H */