172 lines
4.4 KiB
C
172 lines
4.4 KiB
C
/*
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* QLogic Fibre Channel HBA Driver
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* Copyright (c) 2003-2005 QLogic Corporation
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*
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* See LICENSE.qla2xxx for copyright and licensing details.
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*/
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static __inline__ uint16_t qla2x00_debounce_register(volatile uint16_t __iomem *);
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/*
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* qla2x00_debounce_register
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* Debounce register.
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*
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* Input:
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* port = register address.
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*
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* Returns:
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* register value.
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*/
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static __inline__ uint16_t
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qla2x00_debounce_register(volatile uint16_t __iomem *addr)
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{
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volatile uint16_t first;
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volatile uint16_t second;
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do {
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first = RD_REG_WORD(addr);
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barrier();
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cpu_relax();
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second = RD_REG_WORD(addr);
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} while (first != second);
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return (first);
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}
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static __inline__ int qla2x00_normalize_dma_addr(
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dma_addr_t *e_addr, uint32_t *e_len,
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dma_addr_t *ne_addr, uint32_t *ne_len);
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/**
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* qla2x00_normalize_dma_addr() - Normalize an DMA address.
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* @e_addr: Raw DMA address
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* @e_len: Raw DMA length
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* @ne_addr: Normalized second DMA address
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* @ne_len: Normalized second DMA length
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*
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* If the address does not span a 4GB page boundary, the contents of @ne_addr
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* and @ne_len are undefined. @e_len is updated to reflect a normalization.
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*
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* Example:
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*
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* ffffabc0ffffeeee (e_addr) start of DMA address
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* 0000000020000000 (e_len) length of DMA transfer
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* ffffabc11fffeeed end of DMA transfer
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*
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* Is the 4GB boundary crossed?
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*
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* ffffabc0ffffeeee (e_addr)
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* ffffabc11fffeeed (e_addr + e_len - 1)
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* 00000001e0000003 ((e_addr ^ (e_addr + e_len - 1))
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* 0000000100000000 ((e_addr ^ (e_addr + e_len - 1)) & ~(0xffffffff)
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*
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* Compute start of second DMA segment:
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*
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* ffffabc0ffffeeee (e_addr)
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* ffffabc1ffffeeee (0x100000000 + e_addr)
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* ffffabc100000000 (0x100000000 + e_addr) & ~(0xffffffff)
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* ffffabc100000000 (ne_addr)
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*
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* Compute length of second DMA segment:
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*
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* 00000000ffffeeee (e_addr & 0xffffffff)
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* 0000000000001112 (0x100000000 - (e_addr & 0xffffffff))
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* 000000001fffeeee (e_len - (0x100000000 - (e_addr & 0xffffffff))
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* 000000001fffeeee (ne_len)
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*
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* Adjust length of first DMA segment
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*
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* 0000000020000000 (e_len)
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* 0000000000001112 (e_len - ne_len)
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* 0000000000001112 (e_len)
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*
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* Returns non-zero if the specified address was normalized, else zero.
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*/
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static __inline__ int
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qla2x00_normalize_dma_addr(
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dma_addr_t *e_addr, uint32_t *e_len,
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dma_addr_t *ne_addr, uint32_t *ne_len)
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{
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int normalized;
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normalized = 0;
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if ((*e_addr ^ (*e_addr + *e_len - 1)) & ~(0xFFFFFFFFULL)) {
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/* Compute normalized crossed address and len */
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*ne_addr = (0x100000000ULL + *e_addr) & ~(0xFFFFFFFFULL);
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*ne_len = *e_len - (0x100000000ULL - (*e_addr & 0xFFFFFFFFULL));
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*e_len -= *ne_len;
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normalized++;
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}
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return (normalized);
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}
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static __inline__ void qla2x00_poll(scsi_qla_host_t *);
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static inline void
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qla2x00_poll(scsi_qla_host_t *ha)
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{
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ha->isp_ops.intr_handler(0, ha, NULL);
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}
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static __inline__ void qla2x00_check_fabric_devices(scsi_qla_host_t *);
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/*
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* This routine will wait for fabric devices for
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* the reset delay.
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*/
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static __inline__ void qla2x00_check_fabric_devices(scsi_qla_host_t *ha)
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{
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uint16_t fw_state;
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qla2x00_get_firmware_state(ha, &fw_state);
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}
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/**
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* qla2x00_issue_marker() - Issue a Marker IOCB if necessary.
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* @ha: HA context
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* @ha_locked: is function called with the hardware lock
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*
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* Returns non-zero if a failure occured, else zero.
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*/
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static inline int
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qla2x00_issue_marker(scsi_qla_host_t *ha, int ha_locked)
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{
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/* Send marker if required */
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if (ha->marker_needed != 0) {
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if (ha_locked) {
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if (__qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) !=
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QLA_SUCCESS)
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return (QLA_FUNCTION_FAILED);
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} else {
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if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) !=
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QLA_SUCCESS)
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return (QLA_FUNCTION_FAILED);
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}
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ha->marker_needed = 0;
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}
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return (QLA_SUCCESS);
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}
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static inline uint8_t *host_to_fcp_swap(uint8_t *, uint32_t);
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static inline uint8_t *
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host_to_fcp_swap(uint8_t *fcp, uint32_t bsize)
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{
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uint32_t *ifcp = (uint32_t *) fcp;
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uint32_t *ofcp = (uint32_t *) fcp;
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uint32_t iter = bsize >> 2;
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for (; iter ; iter--)
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*ofcp++ = swab32(*ifcp++);
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return fcp;
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}
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static inline int qla2x00_is_reserved_id(scsi_qla_host_t *, uint16_t);
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static inline int
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qla2x00_is_reserved_id(scsi_qla_host_t *ha, uint16_t loop_id)
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{
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if (IS_QLA24XX(ha) || IS_QLA25XX(ha))
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return (loop_id > NPH_LAST_HANDLE);
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return ((loop_id > ha->last_loop_id && loop_id < SNS_FIRST_LOOP_ID) ||
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loop_id == MANAGEMENT_SERVER || loop_id == BROADCAST);
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};
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