1 /* 2 * QLOGIC LINUX SOFTWARE 3 * 4 * QLogic ISP2x00 device driver for Linux 2.6.x 5 * Copyright (C) 2003-2005 QLogic Corporation 6 * (www.qlogic.com) 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2, or (at your option) any 11 * later version. 12 * 13 * This program is distributed in the hope that it will be useful, but 14 * WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * General Public License for more details. 17 * 18 */ 19 20 21 static __inline__ uint16_t qla2x00_debounce_register(volatile uint16_t __iomem *); 22 /* 23 * qla2x00_debounce_register 24 * Debounce register. 25 * 26 * Input: 27 * port = register address. 28 * 29 * Returns: 30 * register value. 31 */ 32 static __inline__ uint16_t 33 qla2x00_debounce_register(volatile uint16_t __iomem *addr) 34 { 35 volatile uint16_t first; 36 volatile uint16_t second; 37 38 do { 39 first = RD_REG_WORD(addr); 40 barrier(); 41 cpu_relax(); 42 second = RD_REG_WORD(addr); 43 } while (first != second); 44 45 return (first); 46 } 47 48 static __inline__ int qla2x00_normalize_dma_addr( 49 dma_addr_t *e_addr, uint32_t *e_len, 50 dma_addr_t *ne_addr, uint32_t *ne_len); 51 52 /** 53 * qla2x00_normalize_dma_addr() - Normalize an DMA address. 54 * @e_addr: Raw DMA address 55 * @e_len: Raw DMA length 56 * @ne_addr: Normalized second DMA address 57 * @ne_len: Normalized second DMA length 58 * 59 * If the address does not span a 4GB page boundary, the contents of @ne_addr 60 * and @ne_len are undefined. @e_len is updated to reflect a normalization. 61 * 62 * Example: 63 * 64 * ffffabc0ffffeeee (e_addr) start of DMA address 65 * 0000000020000000 (e_len) length of DMA transfer 66 * ffffabc11fffeeed end of DMA transfer 67 * 68 * Is the 4GB boundary crossed? 69 * 70 * ffffabc0ffffeeee (e_addr) 71 * ffffabc11fffeeed (e_addr + e_len - 1) 72 * 00000001e0000003 ((e_addr ^ (e_addr + e_len - 1)) 73 * 0000000100000000 ((e_addr ^ (e_addr + e_len - 1)) & ~(0xffffffff) 74 * 75 * Compute start of second DMA segment: 76 * 77 * ffffabc0ffffeeee (e_addr) 78 * ffffabc1ffffeeee (0x100000000 + e_addr) 79 * ffffabc100000000 (0x100000000 + e_addr) & ~(0xffffffff) 80 * ffffabc100000000 (ne_addr) 81 * 82 * Compute length of second DMA segment: 83 * 84 * 00000000ffffeeee (e_addr & 0xffffffff) 85 * 0000000000001112 (0x100000000 - (e_addr & 0xffffffff)) 86 * 000000001fffeeee (e_len - (0x100000000 - (e_addr & 0xffffffff)) 87 * 000000001fffeeee (ne_len) 88 * 89 * Adjust length of first DMA segment 90 * 91 * 0000000020000000 (e_len) 92 * 0000000000001112 (e_len - ne_len) 93 * 0000000000001112 (e_len) 94 * 95 * Returns non-zero if the specified address was normalized, else zero. 96 */ 97 static __inline__ int 98 qla2x00_normalize_dma_addr( 99 dma_addr_t *e_addr, uint32_t *e_len, 100 dma_addr_t *ne_addr, uint32_t *ne_len) 101 { 102 int normalized; 103 104 normalized = 0; 105 if ((*e_addr ^ (*e_addr + *e_len - 1)) & ~(0xFFFFFFFFULL)) { 106 /* Compute normalized crossed address and len */ 107 *ne_addr = (0x100000000ULL + *e_addr) & ~(0xFFFFFFFFULL); 108 *ne_len = *e_len - (0x100000000ULL - (*e_addr & 0xFFFFFFFFULL)); 109 *e_len -= *ne_len; 110 111 normalized++; 112 } 113 return (normalized); 114 } 115 116 static __inline__ void qla2x00_poll(scsi_qla_host_t *); 117 static inline void 118 qla2x00_poll(scsi_qla_host_t *ha) 119 { 120 ha->isp_ops.intr_handler(0, ha, NULL); 121 } 122 123 static __inline__ void qla2x00_check_fabric_devices(scsi_qla_host_t *); 124 /* 125 * This routine will wait for fabric devices for 126 * the reset delay. 127 */ 128 static __inline__ void qla2x00_check_fabric_devices(scsi_qla_host_t *ha) 129 { 130 uint16_t fw_state; 131 132 qla2x00_get_firmware_state(ha, &fw_state); 133 } 134 135 /** 136 * qla2x00_issue_marker() - Issue a Marker IOCB if necessary. 137 * @ha: HA context 138 * @ha_locked: is function called with the hardware lock 139 * 140 * Returns non-zero if a failure occured, else zero. 141 */ 142 static inline int 143 qla2x00_issue_marker(scsi_qla_host_t *ha, int ha_locked) 144 { 145 /* Send marker if required */ 146 if (ha->marker_needed != 0) { 147 if (ha_locked) { 148 if (__qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) != 149 QLA_SUCCESS) 150 return (QLA_FUNCTION_FAILED); 151 } else { 152 if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) != 153 QLA_SUCCESS) 154 return (QLA_FUNCTION_FAILED); 155 } 156 ha->marker_needed = 0; 157 } 158 return (QLA_SUCCESS); 159 } 160 161 static inline uint8_t *host_to_fcp_swap(uint8_t *, uint32_t); 162 static inline uint8_t * 163 host_to_fcp_swap(uint8_t *fcp, uint32_t bsize) 164 { 165 uint32_t *ifcp = (uint32_t *) fcp; 166 uint32_t *ofcp = (uint32_t *) fcp; 167 uint32_t iter = bsize >> 2; 168 169 for (; iter ; iter--) 170 *ofcp++ = swab32(*ifcp++); 171 172 return fcp; 173 } 174 175 static inline int qla2x00_is_reserved_id(scsi_qla_host_t *, uint16_t); 176 static inline int 177 qla2x00_is_reserved_id(scsi_qla_host_t *ha, uint16_t loop_id) 178 { 179 if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) 180 return (loop_id > NPH_LAST_HANDLE); 181 182 return ((loop_id > ha->last_loop_id && loop_id < SNS_FIRST_LOOP_ID) || 183 loop_id == MANAGEMENT_SERVER || loop_id == BROADCAST); 184 }; 185