/*      $NetBSD: cac_pci.c,v 1.36 2018/12/09 11:14:01 jdolecek Exp $    */

/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Andrew Doran.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

/*
* PCI front-end for cac(4) driver.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: cac_pci.c,v 1.36 2018/12/09 11:14:01 jdolecek Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/queue.h>
#include <sys/module.h>

#include <machine/endian.h>
#include <sys/bus.h>

#include <dev/pci/pcidevs.h>
#include <dev/pci/pcivar.h>

#include <dev/ic/cacreg.h>
#include <dev/ic/cacvar.h>

#include "ioconf.h"

static struct   cac_ccb *cac_pci_l0_completed(struct cac_softc *);
static int      cac_pci_l0_fifo_full(struct cac_softc *);
static void     cac_pci_l0_intr_enable(struct cac_softc *, int);
static int      cac_pci_l0_intr_pending(struct cac_softc *);
static void     cac_pci_l0_submit(struct cac_softc *, struct cac_ccb *);

static const struct cac_linkage cac_pci_l0 = {
       cac_pci_l0_completed,
       cac_pci_l0_fifo_full,
       cac_pci_l0_intr_enable,
       cac_pci_l0_intr_pending,
       cac_pci_l0_submit
};

#define CT_STARTFW      0x01    /* Need to start controller firmware */

static struct cac_pci_type {
       int     ct_subsysid;
       int     ct_flags;
       const struct    cac_linkage *ct_linkage;
       const char      *ct_typestr;
} const cac_pci_type[] = {
       { 0x40300e11,   0,              &cac_l0,        "SMART-2/P" },
       { 0x40310e11,   0,              &cac_l0,        "SMART-2SL" },
       { 0x40320e11,   0,              &cac_l0,        "Smart Array 3200" },
       { 0x40330e11,   0,              &cac_l0,        "Smart Array 3100ES" },
       { 0x40340e11,   0,              &cac_l0,        "Smart Array 221" },
       { 0x40400e11,   CT_STARTFW,     &cac_pci_l0,    "Integrated Array" },
       { 0x40480e11,   CT_STARTFW,     &cac_pci_l0,    "RAID LC2" },
       { 0x40500e11,   0,              &cac_pci_l0,    "Smart Array 4200" },
       { 0x40510e11,   0,              &cac_pci_l0,    "Smart Array 4200ES" },
       { 0x40580e11,   0,              &cac_pci_l0,    "Smart Array 431" },
};

static struct cac_pci_product {
       u_short cp_vendor;
       u_short cp_product;
} const cac_pci_product[] = {
       { PCI_VENDOR_COMPAQ,    PCI_PRODUCT_COMPAQ_SMART2P },
       { PCI_VENDOR_DEC,       PCI_PRODUCT_DEC_21554 },
       { PCI_VENDOR_SYMBIOS,   PCI_PRODUCT_SYMBIOS_1510 },
};

static const struct cac_pci_type *
cac_pci_findtype(struct pci_attach_args *pa)
{
       const struct cac_pci_type *ct;
       const struct cac_pci_product *cp;
       pcireg_t subsysid;
       int i;

       cp = cac_pci_product;
       i = 0;
       while (i < sizeof(cac_pci_product) / sizeof(cac_pci_product[0])) {
               if (PCI_VENDOR(pa->pa_id) == cp->cp_vendor &&
                   PCI_PRODUCT(pa->pa_id) == cp->cp_product)
                       break;
               cp++;
               i++;
       }
       if (i == sizeof(cac_pci_product) / sizeof(cac_pci_product[0]))
               return (NULL);

       subsysid = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG);
       ct = cac_pci_type;
       i = 0;
       while (i < sizeof(cac_pci_type) / sizeof(cac_pci_type[0])) {
               if (subsysid == ct->ct_subsysid)
                       break;
               ct++;
               i++;
       }
       if (i == sizeof(cac_pci_type) / sizeof(cac_pci_type[0]))
               return (NULL);

       return (ct);
}

static int
cac_pci_match(device_t parent, cfdata_t match, void *aux)
{

       return (cac_pci_findtype(aux) != NULL);
}

static void
cac_pci_attach(device_t parent, device_t self, void *aux)
{
       struct pci_attach_args *pa;
       const struct cac_pci_type *ct;
       struct cac_softc *sc;
       pci_chipset_tag_t pc;
       pci_intr_handle_t ih;
       const char *intrstr;
       pcireg_t reg;
       int memr, ior, i;
       char intrbuf[PCI_INTRSTR_LEN];

       aprint_naive(": RAID controller\n");

       sc = device_private(self);
       sc->sc_dev = self;
       pa = (struct pci_attach_args *)aux;
       pc = pa->pa_pc;
       ct = cac_pci_findtype(pa);

       /*
        * Map the PCI register window.
        */
       memr = -1;
       ior = -1;

       for (i = 0x10; i <= 0x14; i += 4) {
               reg = pci_conf_read(pa->pa_pc, pa->pa_tag, i);

               if (PCI_MAPREG_TYPE(reg) == PCI_MAPREG_TYPE_IO) {
                       if (ior == -1 && PCI_MAPREG_IO_SIZE(reg) != 0)
                               ior = i;
               } else {
                       if (memr == -1 && PCI_MAPREG_MEM_SIZE(reg) != 0)
                               memr = i;
               }
       }

       if (memr != -1) {
               if (pci_mapreg_map(pa, memr, PCI_MAPREG_TYPE_MEM, 0,
                   &sc->sc_iot, &sc->sc_ioh, NULL, NULL))
                       memr = -1;
               else
                       ior = -1;
       }
       if (ior != -1)
               if (pci_mapreg_map(pa, ior, PCI_MAPREG_TYPE_IO, 0,
                   &sc->sc_iot, &sc->sc_ioh, NULL, NULL))
                       ior = -1;
       if (memr == -1 && ior == -1) {
               aprint_error_dev(self, "can't map i/o or memory space\n");
               return;
       }

       sc->sc_dmat = pa->pa_dmat;

       /* Enable the device. */
       reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
       pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
                      reg | PCI_COMMAND_MASTER_ENABLE);

       /* Map and establish the interrupt. */
       if (pci_intr_map(pa, &ih)) {
               aprint_error("can't map interrupt\n");
               return;
       }
       intrstr = pci_intr_string(pc, ih, intrbuf, sizeof(intrbuf));
       sc->sc_ih = pci_intr_establish_xname(pc, ih, IPL_BIO, cac_intr, sc,
           device_xname(self));
       if (sc->sc_ih == NULL) {
               aprint_error("can't establish interrupt");
               if (intrstr != NULL)
                       aprint_error(" at %s", intrstr);
               aprint_error("\n");
               return;
       }

       aprint_normal(": Compaq %s\n", ct->ct_typestr);

       /* Now attach to the bus-independent code. */
       memcpy(&sc->sc_cl, ct->ct_linkage, sizeof(sc->sc_cl));
       cac_init(sc, intrstr, (ct->ct_flags & CT_STARTFW) != 0);
}

CFATTACH_DECL3_NEW(cac_pci, sizeof(struct cac_softc),
   cac_pci_match, cac_pci_attach, NULL, NULL, cac_rescan, NULL, 0);

static void
cac_pci_l0_submit(struct cac_softc *sc, struct cac_ccb *ccb)
{

       bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap,
           (char *)ccb - (char *)sc->sc_ccbs,
           sizeof(struct cac_ccb), BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
       cac_outl(sc, CAC_42REG_CMD_FIFO, ccb->ccb_paddr);
}

static struct cac_ccb *
cac_pci_l0_completed(struct cac_softc *sc)
{
       struct cac_ccb *ccb;
       u_int32_t off;

       if ((off = cac_inl(sc, CAC_42REG_DONE_FIFO)) == 0xffffffffU)
               return (NULL);

       cac_outl(sc, CAC_42REG_DONE_FIFO, 0);

       if ((off & 3) != 0)
               printf("%s: failed command list returned: %lx\n",
                   device_xname(sc->sc_dev), (long)off);

       off = (off & ~3) - sc->sc_ccbs_paddr;
       ccb = (struct cac_ccb *)((char *)sc->sc_ccbs + off);

       bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap, off, sizeof(struct cac_ccb),
           BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);

       if ((off & 3) != 0 && ccb->ccb_req.error == 0)
               ccb->ccb_req.error = CAC_RET_CMD_REJECTED;

       return (ccb);
}

static int
cac_pci_l0_intr_pending(struct cac_softc *sc)
{

       return ((cac_inl(sc, CAC_42REG_STATUS) & CAC_42_EXTINT) != 0);
}

static void
cac_pci_l0_intr_enable(struct cac_softc *sc, int state)
{

       cac_outl(sc, CAC_42REG_INTR_MASK, (state ? 0 : 8));     /* XXX */
}

static int
cac_pci_l0_fifo_full(struct cac_softc *sc)
{

       return (cac_inl(sc, CAC_42REG_CMD_FIFO) != 0);
}

MODULE(MODULE_CLASS_DRIVER, cac_pci, "cac,pci");

#ifdef _MODULE
/*
* XXX Don't allow ioconf.c to redefine the "struct cfdriver ld_cd"
* XXX it will be defined in the common-code module
*/
#undef  CFDRIVER_DECL
#define CFDRIVER_DECL(name, class, attr)
#include "ioconf.c"
#endif

static int
cac_pci_modcmd(modcmd_t cmd, void *opaque)
{
       int error = 0;

#ifdef _MODULE
       switch (cmd) {
       case MODULE_CMD_INIT:
               /*
                * We skip over the first entry in cfdriver[] array
                * since the cfdriver is attached by the common
                * (non-attachment-specific) code.
                */
               error = config_init_component(&cfdriver_ioconf_cac_pci[1],
                   cfattach_ioconf_cac_pci, cfdata_ioconf_cac_pci);
               break;
       case MODULE_CMD_FINI:
               error = config_fini_component(&cfdriver_ioconf_cac_pci[1],
                   cfattach_ioconf_cac_pci, cfdata_ioconf_cac_pci);
               break;
       default:
               error = ENOTTY;
               break;
       }
#endif

       return error;
}

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