1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2009 QLogic Corporation. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. 29 */ 30 31 #ifndef _QLT_DMA_H 32 #define _QLT_DMA_H 33 34 #include <sys/stmf.h> 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 /* 41 * DMA memory object. 42 */ 43 #define QLT_DMA_SG_LIST_LENGTH 1270 44 #define CMD7_2400_DATA_SEGMENTS 1 45 #define CONT_A64_DATA_SEGMENTS 5 46 47 48 /* 49 * Container for ddi_dma_handle 50 * 51 * These elements are either linked to an active dbuf or in the free list. 52 */ 53 struct qlt_dma_handle { 54 struct qlt_dma_handle *next; 55 ddi_dma_handle_t dma_handle; 56 ddi_dma_cookie_t first_cookie; 57 uint_t num_cookies; 58 uint_t num_cookies_fetched; 59 }; 60 61 typedef struct qlt_dma_handle qlt_dma_handle_t; 62 63 /* 64 * The dbuf private data when using a scatter/gather list. 65 */ 66 struct qlt_dma_sgl { 67 uint16_t handle_count; 68 uint16_t cookie_count; 69 uint16_t cookie_next_fetch; 70 uint16_t cookie_prefetched; 71 qlt_dma_handle_t *handle_list; 72 qlt_dma_handle_t *handle_next_fetch; 73 size_t qsize; 74 ddi_dma_cookie_t cookie[1]; 75 }; 76 77 typedef struct qlt_dma_sgl qlt_dma_sgl_t; 78 79 /* 80 * Structure to maintain ddi_dma_handle free pool. 81 */ 82 struct qlt_dma_handle_pool { 83 kmutex_t pool_lock; /* protects all fields */ 84 qlt_dma_handle_t *free_list; 85 int num_free; 86 int num_total; 87 }; 88 89 typedef struct qlt_dma_handle_pool qlt_dma_handle_pool_t; 90 91 struct qlt_dmem_bucket; 92 93 typedef struct qlt_dmem_bctl { 94 struct qlt_dmem_bucket *bctl_bucket; 95 struct qlt_dmem_bctl *bctl_next; 96 uint64_t bctl_dev_addr; 97 uint8_t bctl_task_ndx; /* notused */ 98 stmf_data_buf_t *bctl_buf; 99 } qlt_dmem_bctl_t; 100 101 typedef struct qlt_dmem_bucket { 102 uint32_t dmem_buf_size; 103 uint32_t dmem_nbufs; 104 uint32_t dmem_nbufs_free; 105 uint8_t *dmem_host_addr; 106 uint64_t dmem_dev_addr; 107 ddi_dma_handle_t dmem_dma_handle; 108 ddi_acc_handle_t dmem_acc_handle; 109 kmutex_t dmem_lock; 110 qlt_dmem_bctl_t *dmem_bctl_free_list; 111 void *dmem_bctls_mem; 112 } qlt_dmem_bucket_t; 113 114 fct_status_t qlt_dmem_init(qlt_state_t *qlt); 115 void qlt_dmem_fini(qlt_state_t *qlt); 116 void qlt_dma_handle_pool_init(qlt_state_t *qlt); 117 void qlt_dma_handle_pool_fini(qlt_state_t *qlt); 118 stmf_data_buf_t *qlt_dmem_alloc(fct_local_port_t *port, uint32_t size, 119 uint32_t *pminsize, uint32_t flags); 120 stmf_data_buf_t *qlt_i_dmem_alloc(qlt_state_t *qlt, uint32_t size, 121 uint32_t *pminsize, uint32_t flags); 122 void qlt_dmem_free(fct_dbuf_store_t *fds, stmf_data_buf_t *dbuf); 123 void qlt_i_dmem_free(qlt_state_t *qlt, stmf_data_buf_t *dbuf); 124 stmf_status_t qlt_dma_setup_dbuf(fct_local_port_t *port, 125 stmf_data_buf_t *dbuf, uint32_t flags); 126 void qlt_dma_teardown_dbuf(fct_dbuf_store_t *fds, stmf_data_buf_t *dbuf); 127 void qlt_dmem_dma_sync(stmf_data_buf_t *dbuf, uint_t sync_type); 128 uint8_t qlt_get_iocb_count(uint32_t cookie_cnt); 129 uint64_t qlt_ddi_vtop(caddr_t vaddr); 130 /* 131 * XXX move the following into the fct layer 132 */ 133 uint16_t qlt_get_cookie_count(stmf_data_buf_t *dbuf); 134 void qlt_ddi_dma_nextcookie(stmf_data_buf_t *dbuf, ddi_dma_cookie_t *cookie_p); 135 ddi_dma_cookie_t *qlt_get_cookie_array(stmf_data_buf_t *dbuf); 136 137 138 #ifdef __cplusplus 139 } 140 #endif 141 142 #endif /* _QLT_DMA_H */ 143