Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * QLOGIC LINUX SOFTWARE |
| 3 | * |
| 4 | * QLogic ISP2x00 device driver for Linux 2.6.x |
| 5 | * Copyright (C) 2003-2004 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 | { |
Andrew Vasquez | abbd887 | 2005-07-06 10:30:05 -0700 | [diff] [blame] | 120 | ha->isp_ops.intr_handler(0, ha, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | } |
| 122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | static __inline__ int qla2x00_is_wwn_zero(uint8_t *); |
| 124 | |
| 125 | /* |
| 126 | * qla2x00_is_wwn_zero - Check for zero node name |
| 127 | * |
| 128 | * Input: |
| 129 | * wwn = Pointer to WW name to check |
| 130 | * |
| 131 | * Returns: |
| 132 | * 1 if name is 0x00 else 0 |
| 133 | * |
| 134 | * Context: |
| 135 | * Kernel context. |
| 136 | */ |
| 137 | static __inline__ int |
| 138 | qla2x00_is_wwn_zero(uint8_t *wwn) |
| 139 | { |
| 140 | int cnt; |
| 141 | |
| 142 | for (cnt = 0; cnt < WWN_SIZE ; cnt++, wwn++) { |
| 143 | if (*wwn != 0) |
| 144 | break; |
| 145 | } |
| 146 | /* if zero return 1 */ |
| 147 | if (cnt == WWN_SIZE) |
| 148 | return (1); |
| 149 | else |
| 150 | return (0); |
| 151 | } |
| 152 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | static __inline__ void qla2x00_check_fabric_devices(scsi_qla_host_t *); |
| 154 | /* |
| 155 | * This routine will wait for fabric devices for |
| 156 | * the reset delay. |
| 157 | */ |
| 158 | static __inline__ void qla2x00_check_fabric_devices(scsi_qla_host_t *ha) |
| 159 | { |
| 160 | uint16_t fw_state; |
| 161 | |
| 162 | qla2x00_get_firmware_state(ha, &fw_state); |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * qla2x00_issue_marker() - Issue a Marker IOCB if necessary. |
| 167 | * @ha: HA context |
| 168 | * @ha_locked: is function called with the hardware lock |
| 169 | * |
| 170 | * Returns non-zero if a failure occured, else zero. |
| 171 | */ |
| 172 | static inline int |
| 173 | qla2x00_issue_marker(scsi_qla_host_t *ha, int ha_locked) |
| 174 | { |
| 175 | /* Send marker if required */ |
| 176 | if (ha->marker_needed != 0) { |
| 177 | if (ha_locked) { |
| 178 | if (__qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) != |
| 179 | QLA_SUCCESS) |
| 180 | return (QLA_FUNCTION_FAILED); |
| 181 | } else { |
| 182 | if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) != |
| 183 | QLA_SUCCESS) |
| 184 | return (QLA_FUNCTION_FAILED); |
| 185 | } |
| 186 | ha->marker_needed = 0; |
| 187 | } |
| 188 | return (QLA_SUCCESS); |
| 189 | } |
| 190 | |
| 191 | static __inline__ void qla2x00_add_timer_to_cmd(srb_t *, int); |
| 192 | static __inline__ void qla2x00_delete_timer_from_cmd(srb_t *); |
| 193 | |
| 194 | /************************************************************************** |
| 195 | * qla2x00_add_timer_to_cmd |
| 196 | * |
| 197 | * Description: |
| 198 | * Creates a timer for the specified command. The timeout is usually |
| 199 | * the command time from kernel minus 2 secs. |
| 200 | * |
| 201 | * Input: |
| 202 | * sp - pointer to validate |
| 203 | * |
| 204 | * Returns: |
| 205 | * None. |
| 206 | **************************************************************************/ |
| 207 | static inline void |
| 208 | qla2x00_add_timer_to_cmd(srb_t *sp, int timeout) |
| 209 | { |
| 210 | init_timer(&sp->timer); |
| 211 | sp->timer.expires = jiffies + timeout * HZ; |
| 212 | sp->timer.data = (unsigned long) sp; |
| 213 | sp->timer.function = (void (*) (unsigned long))qla2x00_cmd_timeout; |
| 214 | add_timer(&sp->timer); |
| 215 | } |
| 216 | |
| 217 | /************************************************************************** |
| 218 | * qla2x00_delete_timer_from_cmd |
| 219 | * |
| 220 | * Description: |
| 221 | * Delete the timer for the specified command. |
| 222 | * |
| 223 | * Input: |
| 224 | * sp - pointer to validate |
| 225 | * |
| 226 | * Returns: |
| 227 | * None. |
| 228 | **************************************************************************/ |
| 229 | static inline void |
| 230 | qla2x00_delete_timer_from_cmd(srb_t *sp) |
| 231 | { |
| 232 | if (sp->timer.function != NULL) { |
| 233 | del_timer(&sp->timer); |
| 234 | sp->timer.function = NULL; |
| 235 | sp->timer.data = (unsigned long) NULL; |
| 236 | } |
| 237 | } |
| 238 | |
Andrew Vasquez | 2b6c0ce | 2005-07-06 10:31:17 -0700 | [diff] [blame^] | 239 | static inline uint8_t *host_to_fcp_swap(uint8_t *, uint32_t); |
| 240 | static inline uint8_t * |
| 241 | host_to_fcp_swap(uint8_t *fcp, uint32_t bsize) |
| 242 | { |
| 243 | uint32_t *ifcp = (uint32_t *) fcp; |
| 244 | uint32_t *ofcp = (uint32_t *) fcp; |
| 245 | uint32_t iter = bsize >> 2; |
| 246 | |
| 247 | for (; iter ; iter--) |
| 248 | *ofcp++ = swab32(*ifcp++); |
| 249 | |
| 250 | return fcp; |
| 251 | } |
Andrew Vasquez | 3d71644 | 2005-07-06 10:30:26 -0700 | [diff] [blame] | 252 | |
| 253 | static inline int qla2x00_is_reserved_id(scsi_qla_host_t *, uint16_t); |
| 254 | static inline int |
| 255 | qla2x00_is_reserved_id(scsi_qla_host_t *ha, uint16_t loop_id) |
| 256 | { |
| 257 | if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) |
| 258 | return (loop_id > NPH_LAST_HANDLE); |
| 259 | |
| 260 | return ((loop_id > ha->last_loop_id && loop_id < SNS_FIRST_LOOP_ID) || |
| 261 | loop_id == MANAGEMENT_SERVER || loop_id == BROADCAST); |
| 262 | }; |