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aic94xx_sds.c

/*
 * Aic94xx SAS/SATA driver access to shared data structures and memory
 * maps.
 *
 * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
 *
 * This file is licensed under GPLv2.
 *
 * This file is part of the aic94xx driver.
 *
 * The aic94xx driver is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; version 2 of the
 * License.
 *
 * The aic94xx driver is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with the aic94xx driver; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#include <linux/pci.h>
#include <linux/delay.h>

#include "aic94xx.h"
#include "aic94xx_reg.h"

/* ---------- OCM stuff ---------- */

struct asd_ocm_dir_ent {
      u8 type;
      u8 offs[3];
      u8 _r1;
      u8 size[3];
} __attribute__ ((packed));

struct asd_ocm_dir {
      char sig[2];
      u8   _r1[2];
      u8   major;          /* 0 */
      u8   minor;          /* 0 */
      u8   _r2;
      u8   num_de;
      struct asd_ocm_dir_ent entry[15];
} __attribute__ ((packed));

#define     OCM_DE_OCM_DIR                0x00
#define     OCM_DE_WIN_DRVR               0x01
#define     OCM_DE_BIOS_CHIM        0x02
#define     OCM_DE_RAID_ENGN        0x03
#define     OCM_DE_BIOS_INTL        0x04
#define     OCM_DE_BIOS_CHIM_OSM          0x05
#define     OCM_DE_BIOS_CHIM_DYNAMIC      0x06
#define     OCM_DE_ADDC2C_RES0            0x07
#define     OCM_DE_ADDC2C_RES1            0x08
#define     OCM_DE_ADDC2C_RES2            0x09
#define     OCM_DE_ADDC2C_RES3            0x0A

#define OCM_INIT_DIR_ENTRIES  5
/***************************************************************************
*  OCM directory default
***************************************************************************/
static struct asd_ocm_dir OCMDirInit =
{
      .sig = {0x4D, 0x4F},    /* signature */
      .num_de = OCM_INIT_DIR_ENTRIES,     /* no. of directory entries */
};

/***************************************************************************
*  OCM directory Entries default
***************************************************************************/
static struct asd_ocm_dir_ent OCMDirEntriesInit[OCM_INIT_DIR_ENTRIES] =
{
      {
            .type = (OCM_DE_ADDC2C_RES0), /* Entry type  */
            .offs = {128},                /* Offset */
            .size = {0, 4},               /* size */
      },
      {
            .type = (OCM_DE_ADDC2C_RES1), /* Entry type  */
            .offs = {128, 4},       /* Offset */
            .size = {0, 4},               /* size */
      },
      {
            .type = (OCM_DE_ADDC2C_RES2), /* Entry type  */
            .offs = {128, 8},       /* Offset */
            .size = {0, 4},               /* size */
      },
      {
            .type = (OCM_DE_ADDC2C_RES3), /* Entry type  */
            .offs = {128, 12},            /* Offset */
            .size = {0, 4},               /* size */
      },
      {
            .type = (OCM_DE_WIN_DRVR),    /* Entry type  */
            .offs = {128, 16},            /* Offset */
            .size = {128, 235, 1},        /* size */
      },
};

struct asd_bios_chim_struct {
      char sig[4];
      u8   major;          /* 1 */
      u8   minor;          /* 0 */
      u8   bios_major;
      u8   bios_minor;
      __le32  bios_build;
      u8   flags;
      u8   pci_slot;
      __le16  ue_num;
      __le16  ue_size;
      u8  _r[14];
      /* The unit element array is right here.
       */
} __attribute__ ((packed));

/**
 * asd_read_ocm_seg - read an on chip memory (OCM) segment
 * @asd_ha: pointer to the host adapter structure
 * @buffer: where to write the read data
 * @offs: offset into OCM where to read from
 * @size: how many bytes to read
 *
 * Return the number of bytes not read. Return 0 on success.
 */
static int asd_read_ocm_seg(struct asd_ha_struct *asd_ha, void *buffer,
                      u32 offs, int size)
{
      u8 *p = buffer;
      if (unlikely(asd_ha->iospace))
            asd_read_reg_string(asd_ha, buffer, offs+OCM_BASE_ADDR, size);
      else {
            for ( ; size > 0; size--, offs++, p++)
                  *p = asd_read_ocm_byte(asd_ha, offs);
      }
      return size;
}

static int asd_read_ocm_dir(struct asd_ha_struct *asd_ha,
                      struct asd_ocm_dir *dir, u32 offs)
{
      int err = asd_read_ocm_seg(asd_ha, dir, offs, sizeof(*dir));
      if (err) {
            ASD_DPRINTK("couldn't read ocm segment\n");
            return err;
      }

      if (dir->sig[0] != 'M' || dir->sig[1] != 'O') {
            ASD_DPRINTK("no valid dir signature(%c%c) at start of OCM\n",
                      dir->sig[0], dir->sig[1]);
            return -ENOENT;
      }
      if (dir->major != 0) {
            asd_printk("unsupported major version of ocm dir:0x%x\n",
                     dir->major);
            return -ENOENT;
      }
      dir->num_de &= 0xf;
      return 0;
}

/**
 * asd_write_ocm_seg - write an on chip memory (OCM) segment
 * @asd_ha: pointer to the host adapter structure
 * @buffer: where to read the write data
 * @offs: offset into OCM to write to
 * @size: how many bytes to write
 *
 * Return the number of bytes not written. Return 0 on success.
 */
static void asd_write_ocm_seg(struct asd_ha_struct *asd_ha, void *buffer,
                      u32 offs, int size)
{
      u8 *p = buffer;
      if (unlikely(asd_ha->iospace))
            asd_write_reg_string(asd_ha, buffer, offs+OCM_BASE_ADDR, size);
      else {
            for ( ; size > 0; size--, offs++, p++)
                  asd_write_ocm_byte(asd_ha, offs, *p);
      }
      return;
}

#define THREE_TO_NUM(X) ((X)[0] | ((X)[1] << 8) | ((X)[2] << 16))

static int asd_find_dir_entry(struct asd_ocm_dir *dir, u8 type,
                        u32 *offs, u32 *size)
{
      int i;
      struct asd_ocm_dir_ent *ent;

      for (i = 0; i < dir->num_de; i++) {
            if (dir->entry[i].type == type)
                  break;
      }
      if (i >= dir->num_de)
            return -ENOENT;
      ent = &dir->entry[i];
      *offs = (u32) THREE_TO_NUM(ent->offs);
      *size = (u32) THREE_TO_NUM(ent->size);
      return 0;
}

#define OCM_BIOS_CHIM_DE  2
#define BC_BIOS_PRESENT   1

static int asd_get_bios_chim(struct asd_ha_struct *asd_ha,
                       struct asd_ocm_dir *dir)
{
      int err;
      struct asd_bios_chim_struct *bc_struct;
      u32 offs, size;

      err = asd_find_dir_entry(dir, OCM_BIOS_CHIM_DE, &offs, &size);
      if (err) {
            ASD_DPRINTK("couldn't find BIOS_CHIM dir ent\n");
            goto out;
      }
      err = -ENOMEM;
      bc_struct = kmalloc(sizeof(*bc_struct), GFP_KERNEL);
      if (!bc_struct) {
            asd_printk("no memory for bios_chim struct\n");
            goto out;
      }
      err = asd_read_ocm_seg(asd_ha, (void *)bc_struct, offs,
                         sizeof(*bc_struct));
      if (err) {
            ASD_DPRINTK("couldn't read ocm segment\n");
            goto out2;
      }
      if (strncmp(bc_struct->sig, "SOIB", 4)
          && strncmp(bc_struct->sig, "IPSA", 4)) {
            ASD_DPRINTK("BIOS_CHIM entry has no valid sig(%c%c%c%c)\n",
                      bc_struct->sig[0], bc_struct->sig[1],
                      bc_struct->sig[2], bc_struct->sig[3]);
            err = -ENOENT;
            goto out2;
      }
      if (bc_struct->major != 1) {
            asd_printk("BIOS_CHIM unsupported major version:0x%x\n",
                     bc_struct->major);
            err = -ENOENT;
            goto out2;
      }
      if (bc_struct->flags & BC_BIOS_PRESENT) {
            asd_ha->hw_prof.bios.present = 1;
            asd_ha->hw_prof.bios.maj = bc_struct->bios_major;
            asd_ha->hw_prof.bios.min = bc_struct->bios_minor;
            asd_ha->hw_prof.bios.bld = le32_to_cpu(bc_struct->bios_build);
            ASD_DPRINTK("BIOS present (%d,%d), %d\n",
                      asd_ha->hw_prof.bios.maj,
                      asd_ha->hw_prof.bios.min,
                      asd_ha->hw_prof.bios.bld);
      }
      asd_ha->hw_prof.ue.num = le16_to_cpu(bc_struct->ue_num);
      asd_ha->hw_prof.ue.size= le16_to_cpu(bc_struct->ue_size);
      ASD_DPRINTK("ue num:%d, ue size:%d\n", asd_ha->hw_prof.ue.num,
                asd_ha->hw_prof.ue.size);
      size = asd_ha->hw_prof.ue.num * asd_ha->hw_prof.ue.size;
      if (size > 0) {
            err = -ENOMEM;
            asd_ha->hw_prof.ue.area = kmalloc(size, GFP_KERNEL);
            if (!asd_ha->hw_prof.ue.area)
                  goto out2;
            err = asd_read_ocm_seg(asd_ha, (void *)asd_ha->hw_prof.ue.area,
                               offs + sizeof(*bc_struct), size);
            if (err) {
                  kfree(asd_ha->hw_prof.ue.area);
                  asd_ha->hw_prof.ue.area = NULL;
                  asd_ha->hw_prof.ue.num  = 0;
                  asd_ha->hw_prof.ue.size = 0;
                  ASD_DPRINTK("couldn't read ue entries(%d)\n", err);
            }
      }
out2:
      kfree(bc_struct);
out:
      return err;
}

static void
asd_hwi_initialize_ocm_dir (struct asd_ha_struct *asd_ha)
{
      int i;

      /* Zero OCM */
      for (i = 0; i < OCM_MAX_SIZE; i += 4)
            asd_write_ocm_dword(asd_ha, i, 0);

      /* Write Dir */
      asd_write_ocm_seg(asd_ha, &OCMDirInit, 0,
                    sizeof(struct asd_ocm_dir));

      /* Write Dir Entries */
      for (i = 0; i < OCM_INIT_DIR_ENTRIES; i++)
            asd_write_ocm_seg(asd_ha, &OCMDirEntriesInit[i],
                          sizeof(struct asd_ocm_dir) +
                          (i * sizeof(struct asd_ocm_dir_ent))
                          , sizeof(struct asd_ocm_dir_ent));

}

static int
asd_hwi_check_ocm_access (struct asd_ha_struct *asd_ha)
{
      struct pci_dev *pcidev = asd_ha->pcidev;
      u32 reg;
      int err = 0;
      u32 v;

      /* check if OCM has been initialized by BIOS */
      reg = asd_read_reg_dword(asd_ha, EXSICNFGR);

      if (!(reg & OCMINITIALIZED)) {
            err = pci_read_config_dword(pcidev, PCIC_INTRPT_STAT, &v);
            if (err) {
                  asd_printk("couldn't access PCIC_INTRPT_STAT of %s\n",
                              pci_name(pcidev));
                  goto out;
            }

            printk(KERN_INFO "OCM is not initialized by BIOS,"
                   "reinitialize it and ignore it, current IntrptStatus"
                   "is 0x%x\n", v);

            if (v)
                  err = pci_write_config_dword(pcidev,
                                         PCIC_INTRPT_STAT, v);
            if (err) {
                  asd_printk("couldn't write PCIC_INTRPT_STAT of %s\n",
                              pci_name(pcidev));
                  goto out;
            }

            asd_hwi_initialize_ocm_dir(asd_ha);

      }
out:
      return err;
}

/**
 * asd_read_ocm - read on chip memory (OCM)
 * @asd_ha: pointer to the host adapter structure
 */
int asd_read_ocm(struct asd_ha_struct *asd_ha)
{
      int err;
      struct asd_ocm_dir *dir;

      if (asd_hwi_check_ocm_access(asd_ha))
            return -1;

      dir = kmalloc(sizeof(*dir), GFP_KERNEL);
      if (!dir) {
            asd_printk("no memory for ocm dir\n");
            return -ENOMEM;
      }

      err = asd_read_ocm_dir(asd_ha, dir, 0);
      if (err)
            goto out;

      err = asd_get_bios_chim(asd_ha, dir);
out:
      kfree(dir);
      return err;
}

/* ---------- FLASH stuff ---------- */

#define FLASH_RESET                 0xF0

#define ASD_FLASH_SIZE                  0x200000
#define FLASH_DIR_COOKIE                "*** ADAPTEC FLASH DIRECTORY *** "
#define FLASH_NEXT_ENTRY_OFFS       0x2000
#define FLASH_MAX_DIR_ENTRIES       32

#define FLASH_DE_TYPE_MASK              0x3FFFFFFF
#define FLASH_DE_MS                     0x120
#define FLASH_DE_CTRL_A_USER            0xE0

struct asd_flash_de {
      __le32   type;
      __le32   offs;
      __le32   pad_size;
      __le32   image_size;
      __le32   chksum;
      u8       _r[12];
      u8       version[32];
} __attribute__ ((packed));

struct asd_flash_dir {
      u8    cookie[32];
      __le32   rev;             /* 2 */
      __le32   chksum;
      __le32   chksum_antidote;
      __le32   bld;
      u8    bld_id[32];   /* build id data */
      u8    ver_data[32];       /* date and time of build */
      __le32   ae_mask;
      __le32   v_mask;
      __le32   oc_mask;
      u8    _r[20];
      struct asd_flash_de dir_entry[FLASH_MAX_DIR_ENTRIES];
} __attribute__ ((packed));

struct asd_manuf_sec {
      char  sig[2];             /* 'S', 'M' */
      u16   offs_next;
      u8    maj;           /* 0 */
      u8    min;           /* 0 */
      u16   chksum;
      u16   size;
      u8    _r[6];
      u8    sas_addr[SAS_ADDR_SIZE];
      u8    pcba_sn[ASD_PCBA_SN_SIZE];
      /* Here start the other segments */
      u8    linked_list[0];
} __attribute__ ((packed));

struct asd_manuf_phy_desc {
      u8    state;         /* low 4 bits */
#define MS_PHY_STATE_ENABLED    0
#define MS_PHY_STATE_REPORTED   1
#define MS_PHY_STATE_HIDDEN     2
      u8    phy_id;
      u16   _r;
      u8    phy_control_0; /* mode 5 reg 0x160 */
      u8    phy_control_1; /* mode 5 reg 0x161 */
      u8    phy_control_2; /* mode 5 reg 0x162 */
      u8    phy_control_3; /* mode 5 reg 0x163 */
} __attribute__ ((packed));

struct asd_manuf_phy_param {
      char  sig[2];             /* 'P', 'M' */
      u16   next;
      u8    maj;           /* 0 */
      u8    min;           /* 2 */
      u8    num_phy_desc;  /* 8 */
      u8    phy_desc_size; /* 8 */
      u8    _r[3];
      u8    usage_model_id;
      u32   _r2;
      struct asd_manuf_phy_desc phy_desc[ASD_MAX_PHYS];
} __attribute__ ((packed));

#if 0
static const char *asd_sb_type[] = {
      "unknown",
      "SGPIO",
      [2 ... 0x7F] = "unknown",
      [0x80] = "ADPT_I2C",
      [0x81 ... 0xFF] = "VENDOR_UNIQUExx"
};
#endif

struct asd_ms_sb_desc {
      u8    type;
      u8    node_desc_index;
      u8    conn_desc_index;
      u8    _recvd[0];
} __attribute__ ((packed));

#if 0
static const char *asd_conn_type[] = {
      [0 ... 7] = "unknown",
      "SFF8470",
      "SFF8482",
      "SFF8484",
      [0x80] = "PCIX_DAUGHTER0",
      [0x81] = "SAS_DAUGHTER0",
      [0x82 ... 0xFF] = "VENDOR_UNIQUExx"
};

static const char *asd_conn_location[] = {
      "unknown",
      "internal",
      "external",
      "board_to_board",
};
#endif

struct asd_ms_conn_desc {
      u8    type;
      u8    location;
      u8    num_sideband_desc;
      u8    size_sideband_desc;
      u32   _resvd;
      u8    name[16];
      struct asd_ms_sb_desc sb_desc[0];
} __attribute__ ((packed));

struct asd_nd_phy_desc {
      u8    vp_attch_type;
      u8    attch_specific[0];
} __attribute__ ((packed));

#if 0
static const char *asd_node_type[] = {
      "IOP",
      "IO_CONTROLLER",
      "EXPANDER",
      "PORT_MULTIPLIER",
      "PORT_MULTIPLEXER",
      "MULTI_DROP_I2C_BUS",
};
#endif

struct asd_ms_node_desc {
      u8    type;
      u8    num_phy_desc;
      u8    size_phy_desc;
      u8    _resvd;
      u8    name[16];
      struct asd_nd_phy_desc phy_desc[0];
} __attribute__ ((packed));

struct asd_ms_conn_map {
      char  sig[2];             /* 'M', 'C' */
      __le16 next;
      u8    maj;          /* 0 */
      u8    min;          /* 0 */
      __le16 cm_size;           /* size of this struct */
      u8    num_conn;
      u8    conn_size;
      u8    num_nodes;
      u8    usage_model_id;
      u32   _resvd;
      struct asd_ms_conn_desc conn_desc[0];
      struct asd_ms_node_desc node_desc[0];
} __attribute__ ((packed));

struct asd_ctrla_phy_entry {
      u8    sas_addr[SAS_ADDR_SIZE];
      u8    sas_link_rates;  /* max in hi bits, min in low bits */
      u8    flags;
      u8    sata_link_rates;
      u8    _r[5];
} __attribute__ ((packed));

struct asd_ctrla_phy_settings {
      u8    id0;          /* P'h'y */
      u8    _r;
      u16   next;
      u8    num_phys;         /* number of PHYs in the PCI function */
      u8    _r2[3];
      struct asd_ctrla_phy_entry phy_ent[ASD_MAX_PHYS];
} __attribute__ ((packed));

struct asd_ll_el {
      u8   id0;
      u8   id1;
      __le16  next;
      u8   something_here[0];
} __attribute__ ((packed));

static int asd_poll_flash(struct asd_ha_struct *asd_ha)
{
      int c;
      u8 d;

      for (c = 5000; c > 0; c--) {
            d  = asd_read_reg_byte(asd_ha, asd_ha->hw_prof.flash.bar);
            d ^= asd_read_reg_byte(asd_ha, asd_ha->hw_prof.flash.bar);
            if (!d)
                  return 0;
            udelay(5);
      }
      return -ENOENT;
}

static int asd_reset_flash(struct asd_ha_struct *asd_ha)
{
      int err;

      err = asd_poll_flash(asd_ha);
      if (err)
            return err;
      asd_write_reg_byte(asd_ha, asd_ha->hw_prof.flash.bar, FLASH_RESET);
      err = asd_poll_flash(asd_ha);

      return err;
}

static inline int asd_read_flash_seg(struct asd_ha_struct *asd_ha,
                             void *buffer, u32 offs, int size)
{
      asd_read_reg_string(asd_ha, buffer, asd_ha->hw_prof.flash.bar+offs,
                      size);
      return 0;
}

/**
 * asd_find_flash_dir - finds and reads the flash directory
 * @asd_ha: pointer to the host adapter structure
 * @flash_dir: pointer to flash directory structure
 *
 * If found, the flash directory segment will be copied to
 * @flash_dir.  Return 1 if found, 0 if not.
 */
static int asd_find_flash_dir(struct asd_ha_struct *asd_ha,
                        struct asd_flash_dir *flash_dir)
{
      u32 v;
      for (v = 0; v < ASD_FLASH_SIZE; v += FLASH_NEXT_ENTRY_OFFS) {
            asd_read_flash_seg(asd_ha, flash_dir, v,
                           sizeof(FLASH_DIR_COOKIE)-1);
            if (memcmp(flash_dir->cookie, FLASH_DIR_COOKIE,
                     sizeof(FLASH_DIR_COOKIE)-1) == 0) {
                  asd_ha->hw_prof.flash.dir_offs = v;
                  asd_read_flash_seg(asd_ha, flash_dir, v,
                                 sizeof(*flash_dir));
                  return 1;
            }
      }
      return 0;
}

static int asd_flash_getid(struct asd_ha_struct *asd_ha)
{
      int err = 0;
      u32 reg;

      reg = asd_read_reg_dword(asd_ha, EXSICNFGR);

      if (pci_read_config_dword(asd_ha->pcidev, PCI_CONF_FLSH_BAR,
                          &asd_ha->hw_prof.flash.bar)) {
            asd_printk("couldn't read PCI_CONF_FLSH_BAR of %s\n",
                     pci_name(asd_ha->pcidev));
            return -ENOENT;
      }
      asd_ha->hw_prof.flash.present = 1;
      asd_ha->hw_prof.flash.wide = reg & FLASHW ? 1 : 0;
      err = asd_reset_flash(asd_ha);
      if (err) {
            ASD_DPRINTK("couldn't reset flash(%d)\n", err);
            return err;
      }
      return 0;
}

static u16 asd_calc_flash_chksum(u16 *p, int size)
{
      u16 chksum = 0;

      while (size-- > 0)
            chksum += *p++;

      return chksum;
}


static int asd_find_flash_de(struct asd_flash_dir *flash_dir, u32 entry_type,
                       u32 *offs, u32 *size)
{
      int i;
      struct asd_flash_de *de;

      for (i = 0; i < FLASH_MAX_DIR_ENTRIES; i++) {
            u32 type = le32_to_cpu(flash_dir->dir_entry[i].type);

            type &= FLASH_DE_TYPE_MASK;
            if (type == entry_type)
                  break;
      }
      if (i >= FLASH_MAX_DIR_ENTRIES)
            return -ENOENT;
      de = &flash_dir->dir_entry[i];
      *offs = le32_to_cpu(de->offs);
      *size = le32_to_cpu(de->pad_size);
      return 0;
}

static int asd_validate_ms(struct asd_manuf_sec *ms)
{
      if (ms->sig[0] != 'S' || ms->sig[1] != 'M') {
            ASD_DPRINTK("manuf sec: no valid sig(%c%c)\n",
                      ms->sig[0], ms->sig[1]);
            return -ENOENT;
      }
      if (ms->maj != 0) {
            asd_printk("unsupported manuf. sector. major version:%x\n",
                     ms->maj);
            return -ENOENT;
      }
      ms->offs_next = le16_to_cpu((__force __le16) ms->offs_next);
      ms->chksum = le16_to_cpu((__force __le16) ms->chksum);
      ms->size = le16_to_cpu((__force __le16) ms->size);

      if (asd_calc_flash_chksum((u16 *)ms, ms->size/2)) {
            asd_printk("failed manuf sector checksum\n");
      }

      return 0;
}

static int asd_ms_get_sas_addr(struct asd_ha_struct *asd_ha,
                         struct asd_manuf_sec *ms)
{
      memcpy(asd_ha->hw_prof.sas_addr, ms->sas_addr, SAS_ADDR_SIZE);
      return 0;
}

static int asd_ms_get_pcba_sn(struct asd_ha_struct *asd_ha,
                        struct asd_manuf_sec *ms)
{
      memcpy(asd_ha->hw_prof.pcba_sn, ms->pcba_sn, ASD_PCBA_SN_SIZE);
      asd_ha->hw_prof.pcba_sn[ASD_PCBA_SN_SIZE] = '\0';
      return 0;
}

/**
 * asd_find_ll_by_id - find a linked list entry by its id
 * @start: void pointer to the first element in the linked list
 * @id0: the first byte of the id  (offs 0)
 * @id1: the second byte of the id (offs 1)
 *
 * @start has to be the _base_ element start, since the
 * linked list entries's offset is from this pointer.
 * Some linked list entries use only the first id, in which case
 * you can pass 0xFF for the second.
 */
static void *asd_find_ll_by_id(void * const start, const u8 id0, const u8 id1)
{
      struct asd_ll_el *el = start;

      do {
            switch (id1) {
            default:
                  if (el->id1 == id1)
            case 0xFF:
                        if (el->id0 == id0)
                              return el;
            }
            el = start + le16_to_cpu(el->next);
      } while (el != start);

      return NULL;
}

/**
 * asd_ms_get_phy_params - get phy parameters from the manufacturing sector
 * @asd_ha: pointer to the host adapter structure
 * @manuf_sec: pointer to the manufacturing sector
 *
 * The manufacturing sector contans also the linked list of sub-segments,
 * since when it was read, its size was taken from the flash directory,
 * not from the structure size.
 *
 * HIDDEN phys do not count in the total count.  REPORTED phys cannot
 * be enabled but are reported and counted towards the total.
 * ENABLED phys are enabled by default and count towards the total.
 * The absolute total phy number is ASD_MAX_PHYS.  hw_prof->num_phys
 * merely specifies the number of phys the host adapter decided to
 * report.  E.g., it is possible for phys 0, 1 and 2 to be HIDDEN,
 * phys 3, 4 and 5 to be REPORTED and phys 6 and 7 to be ENABLED.
 * In this case ASD_MAX_PHYS is 8, hw_prof->num_phys is 5, and only 2
 * are actually enabled (enabled by default, max number of phys
 * enableable in this case).
 */
static int asd_ms_get_phy_params(struct asd_ha_struct *asd_ha,
                         struct asd_manuf_sec *manuf_sec)
{
      int i;
      int en_phys = 0;
      int rep_phys = 0;
      struct asd_manuf_phy_param *phy_param;
      struct asd_manuf_phy_param dflt_phy_param;

      phy_param = asd_find_ll_by_id(manuf_sec, 'P', 'M');
      if (!phy_param) {
            ASD_DPRINTK("ms: no phy parameters found\n");
            ASD_DPRINTK("ms: Creating default phy parameters\n");
            dflt_phy_param.sig[0] = 'P';
            dflt_phy_param.sig[1] = 'M';
            dflt_phy_param.maj = 0;
            dflt_phy_param.min = 2;
            dflt_phy_param.num_phy_desc = 8;
            dflt_phy_param.phy_desc_size = sizeof(struct asd_manuf_phy_desc);
            for (i =0; i < ASD_MAX_PHYS; i++) {
                  dflt_phy_param.phy_desc[i].state = 0;
                  dflt_phy_param.phy_desc[i].phy_id = i;
                  dflt_phy_param.phy_desc[i].phy_control_0 = 0xf6;
                  dflt_phy_param.phy_desc[i].phy_control_1 = 0x10;
                  dflt_phy_param.phy_desc[i].phy_control_2 = 0x43;
                  dflt_phy_param.phy_desc[i].phy_control_3 = 0xeb;
            }

            phy_param = &dflt_phy_param;

      }

      if (phy_param->maj != 0) {
            asd_printk("unsupported manuf. phy param major version:0x%x\n",
                     phy_param->maj);
            return -ENOENT;
      }

      ASD_DPRINTK("ms: num_phy_desc: %d\n", phy_param->num_phy_desc);
      asd_ha->hw_prof.enabled_phys = 0;
      for (i = 0; i < phy_param->num_phy_desc; i++) {
            struct asd_manuf_phy_desc *pd = &phy_param->phy_desc[i];
            switch (pd->state & 0xF) {
            case MS_PHY_STATE_HIDDEN:
                  ASD_DPRINTK("ms: phy%d: HIDDEN\n", i);
                  continue;
            case MS_PHY_STATE_REPORTED:
                  ASD_DPRINTK("ms: phy%d: REPORTED\n", i);
                  asd_ha->hw_prof.enabled_phys &= ~(1 << i);
                  rep_phys++;
                  continue;
            case MS_PHY_STATE_ENABLED:
                  ASD_DPRINTK("ms: phy%d: ENABLED\n", i);
                  asd_ha->hw_prof.enabled_phys |= (1 << i);
                  en_phys++;
                  break;
            }
            asd_ha->hw_prof.phy_desc[i].phy_control_0 = pd->phy_control_0;
            asd_ha->hw_prof.phy_desc[i].phy_control_1 = pd->phy_control_1;
            asd_ha->hw_prof.phy_desc[i].phy_control_2 = pd->phy_control_2;
            asd_ha->hw_prof.phy_desc[i].phy_control_3 = pd->phy_control_3;
      }
      asd_ha->hw_prof.max_phys = rep_phys + en_phys;
      asd_ha->hw_prof.num_phys = en_phys;
      ASD_DPRINTK("ms: max_phys:0x%x, num_phys:0x%x\n",
                asd_ha->hw_prof.max_phys, asd_ha->hw_prof.num_phys);
      ASD_DPRINTK("ms: enabled_phys:0x%x\n", asd_ha->hw_prof.enabled_phys);
      return 0;
}

static int asd_ms_get_connector_map(struct asd_ha_struct *asd_ha,
                            struct asd_manuf_sec *manuf_sec)
{
      struct asd_ms_conn_map *cm;

      cm = asd_find_ll_by_id(manuf_sec, 'M', 'C');
      if (!cm) {
            ASD_DPRINTK("ms: no connector map found\n");
            return 0;
      }

      if (cm->maj != 0) {
            ASD_DPRINTK("ms: unsupported: connector map major version 0x%x"
                      "\n", cm->maj);
            return -ENOENT;
      }

      /* XXX */

      return 0;
}


/**
 * asd_process_ms - find and extract information from the manufacturing sector
 * @asd_ha: pointer to the host adapter structure
 * @flash_dir: pointer to the flash directory
 */
static int asd_process_ms(struct asd_ha_struct *asd_ha,
                    struct asd_flash_dir *flash_dir)
{
      int err;
      struct asd_manuf_sec *manuf_sec;
      u32 offs, size;

      err = asd_find_flash_de(flash_dir, FLASH_DE_MS, &offs, &size);
      if (err) {
            ASD_DPRINTK("Couldn't find the manuf. sector\n");
            goto out;
      }

      if (size == 0)
            goto out;

      err = -ENOMEM;
      manuf_sec = kmalloc(size, GFP_KERNEL);
      if (!manuf_sec) {
            ASD_DPRINTK("no mem for manuf sector\n");
            goto out;
      }

      err = asd_read_flash_seg(asd_ha, (void *)manuf_sec, offs, size);
      if (err) {
            ASD_DPRINTK("couldn't read manuf sector at 0x%x, size 0x%x\n",
                      offs, size);
            goto out2;
      }

      err = asd_validate_ms(manuf_sec);
      if (err) {
            ASD_DPRINTK("couldn't validate manuf sector\n");
            goto out2;
      }

      err = asd_ms_get_sas_addr(asd_ha, manuf_sec);
      if (err) {
            ASD_DPRINTK("couldn't read the SAS_ADDR\n");
            goto out2;
      }
      ASD_DPRINTK("manuf sect SAS_ADDR %llx\n",
                SAS_ADDR(asd_ha->hw_prof.sas_addr));

      err = asd_ms_get_pcba_sn(asd_ha, manuf_sec);
      if (err) {
            ASD_DPRINTK("couldn't read the PCBA SN\n");
            goto out2;
      }
      ASD_DPRINTK("manuf sect PCBA SN %s\n", asd_ha->hw_prof.pcba_sn);

      err = asd_ms_get_phy_params(asd_ha, manuf_sec);
      if (err) {
            ASD_DPRINTK("ms: couldn't get phy parameters\n");
            goto out2;
      }

      err = asd_ms_get_connector_map(asd_ha, manuf_sec);
      if (err) {
            ASD_DPRINTK("ms: couldn't get connector map\n");
            goto out2;
      }

out2:
      kfree(manuf_sec);
out:
      return err;
}

static int asd_process_ctrla_phy_settings(struct asd_ha_struct *asd_ha,
                                struct asd_ctrla_phy_settings *ps)
{
      int i;
      for (i = 0; i < ps->num_phys; i++) {
            struct asd_ctrla_phy_entry *pe = &ps->phy_ent[i];

            if (!PHY_ENABLED(asd_ha, i))
                  continue;
            if (*(u64 *)pe->sas_addr == 0) {
                  asd_ha->hw_prof.enabled_phys &= ~(1 << i);
                  continue;
            }
            /* This is the SAS address which should be sent in IDENTIFY. */
            memcpy(asd_ha->hw_prof.phy_desc[i].sas_addr, pe->sas_addr,
                   SAS_ADDR_SIZE);
            asd_ha->hw_prof.phy_desc[i].max_sas_lrate =
                  (pe->sas_link_rates & 0xF0) >> 4;
            asd_ha->hw_prof.phy_desc[i].min_sas_lrate =
                  (pe->sas_link_rates & 0x0F);
            asd_ha->hw_prof.phy_desc[i].max_sata_lrate =
                  (pe->sata_link_rates & 0xF0) >> 4;
            asd_ha->hw_prof.phy_desc[i].min_sata_lrate =
                  (pe->sata_link_rates & 0x0F);
            asd_ha->hw_prof.phy_desc[i].flags = pe->flags;
            ASD_DPRINTK("ctrla: phy%d: sas_addr: %llx, sas rate:0x%x-0x%x,"
                      " sata rate:0x%x-0x%x, flags:0x%x\n",
                      i,
                      SAS_ADDR(asd_ha->hw_prof.phy_desc[i].sas_addr),
                      asd_ha->hw_prof.phy_desc[i].max_sas_lrate,
                      asd_ha->hw_prof.phy_desc[i].min_sas_lrate,
                      asd_ha->hw_prof.phy_desc[i].max_sata_lrate,
                      asd_ha->hw_prof.phy_desc[i].min_sata_lrate,
                      asd_ha->hw_prof.phy_desc[i].flags);
      }

      return 0;
}

/**
 * asd_process_ctrl_a_user - process CTRL-A user settings
 * @asd_ha: pointer to the host adapter structure
 * @flash_dir: pointer to the flash directory
 */
static int asd_process_ctrl_a_user(struct asd_ha_struct *asd_ha,
                           struct asd_flash_dir *flash_dir)
{
      int err, i;
      u32 offs, size;
      struct asd_ll_el *el;
      struct asd_ctrla_phy_settings *ps;
      struct asd_ctrla_phy_settings dflt_ps;

      err = asd_find_flash_de(flash_dir, FLASH_DE_CTRL_A_USER, &offs, &size);
      if (err) {
            ASD_DPRINTK("couldn't find CTRL-A user settings section\n");
            ASD_DPRINTK("Creating default CTRL-A user settings section\n");

            dflt_ps.id0 = 'h';
            dflt_ps.num_phys = 8;
            for (i =0; i < ASD_MAX_PHYS; i++) {
                  memcpy(dflt_ps.phy_ent[i].sas_addr,
                         asd_ha->hw_prof.sas_addr, SAS_ADDR_SIZE);
                  dflt_ps.phy_ent[i].sas_link_rates = 0x98;
                  dflt_ps.phy_ent[i].flags = 0x0;
                  dflt_ps.phy_ent[i].sata_link_rates = 0x0;
            }

            size = sizeof(struct asd_ctrla_phy_settings);
            ps = &dflt_ps;
      }

      if (size == 0)
            goto out;

      err = -ENOMEM;
      el = kmalloc(size, GFP_KERNEL);
      if (!el) {
            ASD_DPRINTK("no mem for ctrla user settings section\n");
            goto out;
      }

      err = asd_read_flash_seg(asd_ha, (void *)el, offs, size);
      if (err) {
            ASD_DPRINTK("couldn't read ctrla phy settings section\n");
            goto out2;
      }

      err = -ENOENT;
      ps = asd_find_ll_by_id(el, 'h', 0xFF);
      if (!ps) {
            ASD_DPRINTK("couldn't find ctrla phy settings struct\n");
            goto out2;
      }

      err = asd_process_ctrla_phy_settings(asd_ha, ps);
      if (err) {
            ASD_DPRINTK("couldn't process ctrla phy settings\n");
            goto out2;
      }
out2:
      kfree(el);
out:
      return err;
}

/**
 * asd_read_flash - read flash memory
 * @asd_ha: pointer to the host adapter structure
 */
int asd_read_flash(struct asd_ha_struct *asd_ha)
{
      int err;
      struct asd_flash_dir *flash_dir;

      err = asd_flash_getid(asd_ha);
      if (err)
            return err;

      flash_dir = kmalloc(sizeof(*flash_dir), GFP_KERNEL);
      if (!flash_dir)
            return -ENOMEM;

      err = -ENOENT;
      if (!asd_find_flash_dir(asd_ha, flash_dir)) {
            ASD_DPRINTK("couldn't find flash directory\n");
            goto out;
      }

      if (le32_to_cpu(flash_dir->rev) != 2) {
            asd_printk("unsupported flash dir version:0x%x\n",
                     le32_to_cpu(flash_dir->rev));
            goto out;
      }

      err = asd_process_ms(asd_ha, flash_dir);
      if (err) {
            ASD_DPRINTK("couldn't process manuf sector settings\n");
            goto out;
      }

      err = asd_process_ctrl_a_user(asd_ha, flash_dir);
      if (err) {
            ASD_DPRINTK("couldn't process CTRL-A user settings\n");
            goto out;
      }

out:
      kfree(flash_dir);
      return err;
}

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