lpfc_scsi.c (02e2407858fd62053bf60349c0e72cd1c7a4a60e) lpfc_scsi.c (7f86059ac016d8662e5fbfab4875529510977b47)
1/*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2009 Emulex. All rights reserved. *
5 * EMULEX and SLI are trademarks of Emulex. *
6 * www.emulex.com *
7 * Portions Copyright (C) 2004-2005 Christoph Hellwig *
8 * *

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1509static int
1510lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1511 struct ulp_bde64 *bpl, int datacnt, int protcnt)
1512{
1513 struct scatterlist *sgde = NULL; /* s/g data entry */
1514 struct scatterlist *sgpe = NULL; /* s/g prot entry */
1515 struct lpfc_pde5 *pde5 = NULL;
1516 struct lpfc_pde6 *pde6 = NULL;
1/*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2009 Emulex. All rights reserved. *
5 * EMULEX and SLI are trademarks of Emulex. *
6 * www.emulex.com *
7 * Portions Copyright (C) 2004-2005 Christoph Hellwig *
8 * *

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1509static int
1510lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1511 struct ulp_bde64 *bpl, int datacnt, int protcnt)
1512{
1513 struct scatterlist *sgde = NULL; /* s/g data entry */
1514 struct scatterlist *sgpe = NULL; /* s/g prot entry */
1515 struct lpfc_pde5 *pde5 = NULL;
1516 struct lpfc_pde6 *pde6 = NULL;
1517 struct ulp_bde64 *prot_bde = NULL;
1517 struct lpfc_pde7 *pde7 = NULL;
1518 dma_addr_t dataphysaddr, protphysaddr;
1519 unsigned short curr_data = 0, curr_prot = 0;
1518 dma_addr_t dataphysaddr, protphysaddr;
1519 unsigned short curr_data = 0, curr_prot = 0;
1520 unsigned int split_offset, protgroup_len;
1520 unsigned int split_offset;
1521 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
1521 unsigned int protgrp_blks, protgrp_bytes;
1522 unsigned int remainder, subtotal;
1523 int status;
1524 int datadir = sc->sc_data_direction;
1525 unsigned char pgdone = 0, alldone = 0;
1526 unsigned blksize;
1527 uint32_t reftag;
1528 uint16_t apptagmask, apptagval;

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1580 pde6->word1 = cpu_to_le32(pde6->word1);
1581 pde6->word2 = cpu_to_le32(pde6->word2);
1582
1583 /* advance bpl and increment bde count */
1584 num_bde++;
1585 bpl++;
1586
1587 /* setup the first BDE that points to protection buffer */
1522 unsigned int protgrp_blks, protgrp_bytes;
1523 unsigned int remainder, subtotal;
1524 int status;
1525 int datadir = sc->sc_data_direction;
1526 unsigned char pgdone = 0, alldone = 0;
1527 unsigned blksize;
1528 uint32_t reftag;
1529 uint16_t apptagmask, apptagval;

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1581 pde6->word1 = cpu_to_le32(pde6->word1);
1582 pde6->word2 = cpu_to_le32(pde6->word2);
1583
1584 /* advance bpl and increment bde count */
1585 num_bde++;
1586 bpl++;
1587
1588 /* setup the first BDE that points to protection buffer */
1588 prot_bde = (struct ulp_bde64 *) bpl;
1589 protphysaddr = sg_dma_address(sgpe);
1590 prot_bde->addrHigh = le32_to_cpu(putPaddrLow(protphysaddr));
1591 prot_bde->addrLow = le32_to_cpu(putPaddrHigh(protphysaddr));
1592 protgroup_len = sg_dma_len(sgpe);
1589 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
1590 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
1593
1594 /* must be integer multiple of the DIF block length */
1595 BUG_ON(protgroup_len % 8);
1596
1591
1592 /* must be integer multiple of the DIF block length */
1593 BUG_ON(protgroup_len % 8);
1594
1595 pde7 = (struct lpfc_pde7 *) bpl;
1596 memset(pde7, 0, sizeof(struct lpfc_pde7));
1597 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);
1598
1599 pde7->addrHigh = le32_to_cpu(putPaddrLow(protphysaddr));
1600 pde7->addrLow = le32_to_cpu(putPaddrHigh(protphysaddr));
1601
1597 protgrp_blks = protgroup_len / 8;
1598 protgrp_bytes = protgrp_blks * blksize;
1599
1602 protgrp_blks = protgroup_len / 8;
1603 protgrp_bytes = protgrp_blks * blksize;
1604
1600 prot_bde->tus.f.bdeSize = protgroup_len;
1601 prot_bde->tus.f.bdeFlags = LPFC_PDE7_DESCRIPTOR;
1602 prot_bde->tus.w = le32_to_cpu(bpl->tus.w);
1605 /* check if this pde is crossing the 4K boundary; if so split */
1606 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
1607 protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
1608 protgroup_offset += protgroup_remainder;
1609 protgrp_blks = protgroup_remainder / 8;
1610 protgrp_bytes = protgroup_remainder * blksize;
1611 } else {
1612 protgroup_offset = 0;
1613 curr_prot++;
1614 }
1603
1615
1604 curr_prot++;
1605 num_bde++;
1606
1607 /* setup BDE's for data blocks associated with DIF data */
1608 pgdone = 0;
1609 subtotal = 0; /* total bytes processed for current prot grp */
1610 while (!pgdone) {
1611 if (!sgde) {
1612 lpfc_printf_log(phba, KERN_ERR, LOG_BG,

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1648 if (split_offset)
1649 break;
1650
1651 /* Move to the next s/g segment if possible */
1652 sgde = sg_next(sgde);
1653
1654 }
1655
1616 num_bde++;
1617
1618 /* setup BDE's for data blocks associated with DIF data */
1619 pgdone = 0;
1620 subtotal = 0; /* total bytes processed for current prot grp */
1621 while (!pgdone) {
1622 if (!sgde) {
1623 lpfc_printf_log(phba, KERN_ERR, LOG_BG,

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1659 if (split_offset)
1660 break;
1661
1662 /* Move to the next s/g segment if possible */
1663 sgde = sg_next(sgde);
1664
1665 }
1666
1667 if (protgroup_offset) {
1668 /* update the reference tag */
1669 reftag += protgrp_blks;
1670 bpl++;
1671 continue;
1672 }
1673
1656 /* are we done ? */
1657 if (curr_prot == protcnt) {
1658 alldone = 1;
1659 } else if (curr_prot < protcnt) {
1660 /* advance to next prot buffer */
1661 sgpe = sg_next(sgpe);
1662 bpl++;
1663

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1670 }
1671
1672 } while (!alldone);
1673
1674out:
1675
1676 return num_bde;
1677}
1674 /* are we done ? */
1675 if (curr_prot == protcnt) {
1676 alldone = 1;
1677 } else if (curr_prot < protcnt) {
1678 /* advance to next prot buffer */
1679 sgpe = sg_next(sgpe);
1680 bpl++;
1681

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1688 }
1689
1690 } while (!alldone);
1691
1692out:
1693
1694 return num_bde;
1695}
1696
1678/*
1679 * Given a SCSI command that supports DIF, determine composition of protection
1680 * groups involved in setting up buffer lists
1681 *
1682 * Returns:
1683 * for DIF (for both read and write)
1684 * */
1685static int

--- 2212 unchanged lines hidden --- 		1697/*
1698 * Given a SCSI command that supports DIF, determine composition of protection
1699 * groups involved in setting up buffer lists
1700 *
1701 * Returns:
1702 * for DIF (for both read and write)
1703 * */
1704static int

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