1 files changed, 0 insertions, 771 deletions
diff --git a/sys/dev/ic/ahci.c b/sys/dev/ic/ahci.c
deleted file mode 100644
index 257fd00..0000000
--- a/sys/dev/ic/ahci.c
+++ /dev/null
@@ -1,771 +0,0 @@
-/*
- * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
- * All rights reserved.
- *
- * 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.
- * 3. Neither the name of Hyra nor the names of its
- *    contributors may be used to endorse or promote products derived from
- *    this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
- */
-
-#include <sys/driver.h>
-#include <sys/timer.h>
-#include <sys/types.h>
-#include <sys/cdefs.h>
-#include <sys/syslog.h>
-#include <sys/mmio.h>
-#include <sys/errno.h>
-#include <sys/device.h>
-#include <fs/devfs.h>
-#include <dev/pci/pci.h>
-#include <dev/ic/ahciregs.h>
-#include <dev/ic/ahcivar.h>
-#include <machine/bus.h>
-#include <vm/vm.h>
-#include <string.h>
-
-__KERNEL_META("$Hyra$: ahci.c, Ian Marco Moffett, "
-              "AHCI driver");
-
-#define pr_trace(fmt, ...) kprintf("ahci: " fmt, ##__VA_ARGS__)
-#define pr_error(...) pr_trace(__VA_ARGS__)
-
-static TAILQ_HEAD(, ahci_device) sata_devs;
-
-static struct pci_device *dev;
-static struct timer driver_tmr;
-static struct mutex io_lock;
-static size_t dev_count = 0;
-
-static bool
-is_word_aligned(void *ptr)
-{
-    return (((uintptr_t)ptr) & 1) == 0;
-}
-
-/*
- * Fetch a SATA device with a SATA device
- * minor.
- *
- * @dev_minor: SATA device minor.
- */
-static struct ahci_device *
-ahci_get_sata(dev_t dev_minor)
-{
-    struct ahci_device *dev;
-
-    TAILQ_FOREACH(dev, &sata_devs, link) {
-        if (dev->minor == dev_minor) {
-            return dev;
-        }
-    }
-
-    return NULL;
-}
-
-/*
- * Poll register to have `bits' set/unset.
- *
- * @reg: Register to poll.
- * @bits: Bits expected to be set/unset.
- * @pollset: True to poll as set.
- */
-static int
-ahci_poll_reg32(volatile uint32_t *reg, uint32_t bits, bool pollset)
-{
-    uint32_t time_waited = 0;
-    uint32_t val;
-    bool tmp;
-
-    for (;;) {
-        val = mmio_read32(reg);
-        tmp = (pollset) ? __TEST(val, bits) : !__TEST(val, bits);
-        if (tmp)
-            break;
-        if (time_waited >= AHCI_TIMEOUT)
-            /* Timeout */
-            return -1;
-
-        driver_tmr.msleep(10);
-        time_waited += 10;
-    }
-
-    return 0;
-}
-
-/*
- * Put the HBA in AHCI mode.
- */
-static inline void
-ahci_set_ahci(struct ahci_hba *hba)
-{
-    struct hba_memspace *abar = hba->abar;
-    uint32_t ghc;
-
-    /* Enable AHCI mode */
-    ghc = mmio_read32(&abar->ghc);
-    ghc |= AHCI_GHC_AE;
-    mmio_write32(&abar->ghc, ghc);
-}
-
-/*
- * Reset the HBA with GHC.HR
- *
- * XXX: The spec states that all port registers *except*
- *      PxFB, PxFBU, PxCLB, PxCLBU are reset.
- */
-static int
-ahci_hba_reset(struct ahci_hba *hba)
-{
-    struct hba_memspace *abar = hba->abar;
-    uint32_t ghc;
-    uint8_t attempts = 0;
-    int status;
-
-    ghc = mmio_read32(&abar->ghc);
-    ghc |= AHCI_GHC_HR;
-    mmio_write32(&abar->ghc, ghc);
-
-    /*
-     * Poll the GHC.HR bit. The HBA is supposed to flip
-     * it back to zero once the reset is complete. If
-     * the HBA does not do this, something is screwed
-     * up.
-     *
-     * XXX: We do this twice in case of slow hardware...
-     */
-    while ((attempts++) < 2) {
-        status = ahci_poll_reg32(&abar->ghc, AHCI_GHC_HR, false);
-        if (status == 0) {
-            break;
-        }
-    }
-
-    /* We hope this doesn't happen */
-    if (status != 0) {
-        pr_error("HBA reset failure: GHC.HR stuck (HBA hung)\n");
-        return status;
-    }
-
-    ahci_set_ahci(hba);
-    return 0;
-}
-
-/*
- * Stop port and put it in an idle state.
- */
-static int
-ahci_stop_port(struct hba_port *port)
-{
-    const uint32_t RUN_MASK = (AHCI_PXCMD_FR | AHCI_PXCMD_CR);
-    uint32_t cmd = mmio_read32(&port->cmd);
-
-    /* Check if it is already stopped */
-    if (!__TEST(cmd, RUN_MASK))
-        return 0;
-
-    /*
-     * Stop the FIS receive and disable proessing
-     * of the command list.
-     */
-    cmd &= ~(AHCI_PXCMD_ST | AHCI_PXCMD_FRE);
-    mmio_write32(&port->cmd, cmd);
-    return ahci_poll_reg32(&port->cmd, RUN_MASK, false);
-}
-
-/*
- * Put a port in a running state.
- */
-static int
-ahci_start_port(struct hba_port *port)
-{
-    const uint32_t RUN_MASK = (AHCI_PXCMD_FR | AHCI_PXCMD_CR);
-    uint32_t cmd = mmio_read32(&port->cmd);
-
-    /* Check if it is already running */
-    if (__TEST(cmd, RUN_MASK))
-        return 0;
-
-    /* Start everything up */
-    cmd |= (AHCI_PXCMD_ST | AHCI_PXCMD_FRE);
-    mmio_write32(&port->cmd, cmd);
-    return ahci_poll_reg32(&port->cmd, RUN_MASK, true);
-}
-
-/*
- * Check if a port is active.
- *
- * @port: Port to check.
- */
-static bool
-ahci_port_active(struct hba_port *port)
-{
-    uint32_t ssts;
-    uint8_t det, ipm;
-
-    ssts = mmio_read32(&port->ssts);
-    det = AHCI_PXSSTS_DET(ssts);
-    ipm = AHCI_PXSSTS_IPM(ssts);
-    return (det == AHCI_DET_COMM && ipm == AHCI_IPM_ACTIVE);
-}
-
-/*
- * Dump identify structure for debugging
- * purposes.
- */
-static void
-ahci_dump_identity(struct ata_identity *identity)
-{
-    char serial_number[20];
-    char model_number[40];
-    char tmp;
-
-    memcpy(serial_number, identity->serial_number, sizeof(serial_number));
-    memcpy(model_number, identity->model_number, sizeof(model_number));
-
-    serial_number[sizeof(serial_number) - 1] = '\0';
-    model_number[sizeof(model_number) - 1] = '\0';
-
-    /* Fixup endianess for serial number */
-    for (size_t i = 0; i < sizeof(serial_number); i += 2) {
-        tmp = serial_number[i];
-        serial_number[i] = serial_number[i + 1];
-        serial_number[i + 1] = tmp;
-    }
-
-    /* Fixup endianess for model number */
-    for (size_t i = 0; i < sizeof(model_number); i += 2) {
-        tmp = model_number[i];
-        model_number[i] = model_number[i + 1];
-        model_number[i + 1] = tmp;
-    }
-
-    pr_trace("DRIVE MODEL NUMBER: %s\n", model_number);
-    pr_trace("DRIVE SERIAL NUMBER: %s\n", serial_number);
-}
-
-/*
- * Allocate a command slot.
- */
-static int
-ahci_alloc_cmdslot(struct ahci_hba *hba, struct hba_port *port)
-{
-    uint32_t slotlist = (port->ci | port->sact);
-
-    for (uint16_t i = 0; i < hba->ncmdslots; ++i) {
-        if (!__TEST(slotlist, i))
-            return i;
-    }
-
-    return -1;
-}
-
-/*
- * Submit a command to a device
- *
- * @port: Port of device to submit command to
- * @cmdslot: Command slot.
- */
-static int
-ahci_submit_cmd(struct ahci_hba *hba, struct hba_port *port, uint8_t cmdslot)
-{
-    const uint32_t BUSY_BITS = (AHCI_PXTFD_BSY | AHCI_PXTFD_DRQ);
-    const uint8_t MAX_ATTEMPTS = 3;
-    uint8_t attempts = 0;
-    int status = 0;
-
-    /*
-     * Ensure the port isn't busy before we try to send
-     * any commands. Spin on BSY and DRQ bits until they
-     * become unset or we timeout.
-     */
-    if (ahci_poll_reg32(&port->tfd, BUSY_BITS, false) < 0) {
-        pr_error("Command failed: Port is busy! (slot=%d)\n", cmdslot);
-        return -EBUSY;
-    }
-
-    /* Activate the command slot */
-    mutex_acquire(&io_lock);
-    mmio_write32(&port->ci, __BIT(cmdslot));
-
-    /*
-     * Wait for completion. since this might take a bit, we
-     * give it a few attempts in case it doesn't finish
-     * right away.
-     */
-    while ((attempts++) < MAX_ATTEMPTS) {
-        status = ahci_poll_reg32(&port->ci, __BIT(cmdslot), false);
-        if (status == 0) {
-            break;
-        }
-    }
-
-    /* Did we timeout? */
-    if (status != 0) {
-        pr_error("IDENTIFY timeout: slot %d still set!\n", cmdslot);
-    }
-
-    mutex_release(&io_lock);
-    return status;
-}
-
-static int
-ahci_sata_rw(struct ahci_hba *hba, struct hba_port *port, struct sio_txn *sio,
-             bool write)
-{
-    paddr_t buf_phys;
-    struct ahci_cmd_hdr *cmdhdr;
-    struct ahci_cmdtab *cmdtbl;
-    struct ahci_fis_h2d *fis;
-    int cmdslot, status;
-
-    if (sio->buf == NULL || !is_word_aligned(sio->buf))
-        return -EINVAL;
-    if (sio->len == 0)
-        return -EINVAL;
-
-    buf_phys = VIRT_TO_PHYS(sio->buf);
-    cmdslot = ahci_alloc_cmdslot(hba, port);
-
-    /* Setup command header */
-    cmdhdr = PHYS_TO_VIRT(port->clb + cmdslot * sizeof(struct ahci_cmd_hdr));
-    cmdhdr->w = 0;
-    cmdhdr->cfl = sizeof(struct ahci_fis_h2d) / 4;
-    cmdhdr->prdtl = 1;
-
-    /* Setup physical region descriptor */
-    cmdtbl = PHYS_TO_VIRT(cmdhdr->ctba);
-    cmdtbl->prdt[0].dba = buf_phys;
-    cmdtbl->prdt[0].dbc = (sio->len << 9) - 1;
-    cmdtbl->prdt[0].i = 0;
-
-    /* Setup command FIS */
-    fis = (void *)&cmdtbl->cfis;
-    fis->type = FIS_TYPE_H2D;
-    fis->command = write ? ATA_CMD_WRITE_DMA : ATA_CMD_READ_DMA;
-    fis->c = 1;
-    fis->device = (1 << 6);
-
-    /* Setup LBA */
-    fis->lba0 = sio->offset & 0xFF;
-    fis->lba1 = (sio->offset >> 8) & 0xFF;
-    fis->lba2 = (sio->offset >> 16) & 0xFF;
-    fis->lba3 = (sio->offset >> 24) & 0xFF;
-    fis->lba4 = (sio->offset >> 32) & 0xFF;
-    fis->lba5 = (sio->offset >> 40) & 0xFF;
-
-    /* Setup count */
-    fis->countl = sio->len & 0xFF;
-    fis->counth = (sio->len >> 8) & 0xFF;
-
-    if ((status = ahci_submit_cmd(hba, port, cmdslot)) != 0) {
-        return status;
-    }
-
-    return 0;
-}
-
-/*
- * Send the IDENTIFY command to a device and
- * log info for debugging purposes.
- */
-static int
-ahci_identify(struct ahci_hba *hba, struct hba_port *port)
-{
-    paddr_t buf_phys;
-    struct ahci_cmd_hdr *cmdhdr;
-    struct ahci_cmdtab *cmdtbl;
-    struct ahci_fis_h2d *fis;
-    int cmdslot;
-    void *buf;
-    int status = 0;
-
-    cmdslot = ahci_alloc_cmdslot(hba, port);
-    buf_phys = vm_alloc_pageframe(1);
-    buf = PHYS_TO_VIRT(buf_phys);
-
-    if (buf_phys == 0) {
-        status = -ENOMEM;
-        goto done;
-    }
-
-    if (cmdslot < 0) {
-        status = cmdslot;
-        goto done;
-    }
-
-    memset(buf, 0, vm_get_page_size());
-    cmdhdr = PHYS_TO_VIRT(port->clb + cmdslot * sizeof(struct ahci_cmd_hdr));
-    cmdhdr->w = 0;
-    cmdhdr->cfl = sizeof(struct ahci_fis_h2d) / 4;
-    cmdhdr->prdtl = 1;
-
-    cmdtbl = PHYS_TO_VIRT(cmdhdr->ctba);
-    cmdtbl->prdt[0].dba = VIRT_TO_PHYS(buf);
-    cmdtbl->prdt[0].dbc = 511;
-    cmdtbl->prdt[0].i = 0;
-
-    fis = (void *)&cmdtbl->cfis;
-    fis->command = ATA_CMD_IDENTIFY;
-    fis->c = 1;
-    fis->type = FIS_TYPE_H2D;
-
-    if ((status = ahci_submit_cmd(hba, port, cmdslot)) != 0) {
-        goto done;
-    }
-
-    ahci_dump_identity(buf);
-done:
-    vm_free_pageframe(VIRT_TO_PHYS(buf), 1);
-    return status;
-}
-
-/*
- * Device interface read/write helper
- */
-static int
-sata_dev_rw(struct device *dev, struct sio_txn *sio, bool write)
-{
-    struct ahci_device *sata;
-
-    if (sio == NULL)
-        return -1;
-    if (sio->buf == NULL)
-        return -1;
-
-    sata = ahci_get_sata(dev->minor);
-
-    if (sata == NULL)
-       return -1;
-
-    return ahci_sata_rw(sata->hba, sata->port, sio, write);
-}
-
-/*
- * Device interface read
- */
-static int
-sata_dev_read(struct device *dev, struct sio_txn *sio)
-{
-    return sata_dev_rw(dev, sio, false);
-}
-
-/*
- * Device interface write
- */
-static int
-sata_dev_write(struct device *dev, struct sio_txn *sio)
-{
-    return sata_dev_rw(dev, sio, true);
-}
-
-/*
- * Device interface open
- */
-static int
-sata_dev_open(struct device *dev)
-{
-    return 0;
-}
-
-/*
- * Device interface close
- */
-static int
-sata_dev_close(struct device *dev)
-{
-    return 0;
-}
-
-/*
- * Register a SATA device to the rest of the system
- * and expose to userland as a device file.
- */
-static int
-ahci_sata_register(struct ahci_hba *hba, struct hba_port *port)
-{
-    char devname[128];
-    struct device *dev = NULL;
-    struct ahci_device *sata = NULL;
-    dev_t dev_id;
-    dev_t major;
-
-    sata = dynalloc(sizeof(struct ahci_device));
-    if (sata == NULL) {
-        return -ENOMEM;
-    }
-
-    dev_id = ++dev_count;
-    major = device_alloc_major();
-
-    dev = device_alloc();
-    dev->open = sata_dev_open;
-    dev->close = sata_dev_close;
-    dev->read = sata_dev_read;
-    dev->write = sata_dev_write;
-    dev->blocksize = 512;
-    device_create(dev, dev_id, major);
-
-    sata->port = port;
-    sata->hba = hba;
-    sata->minor = dev->minor;
-
-    snprintf(devname, sizeof(devname), "sd%d", dev_id);
-    devfs_add_dev(devname, dev);
-    TAILQ_INSERT_TAIL(&sata_devs, sata, link);
-    return 0;
-}
-
-/*
- * Init a single port.
- *
- * @port: Port to init.
- */
-static int
-ahci_init_port(struct ahci_hba *hba, struct hba_port *port, size_t portno)
-{
-    paddr_t tmp;
-    struct ahci_cmd_hdr *cmdlist;
-    void *fis;
-    size_t cmdlist_size, pagesize;
-    uint32_t sig;
-    uint8_t ncmdslots;
-    int status = 0;
-
-    sig = mmio_read32(&port->sig);
-    status = ahci_stop_port(port);
-    if (status != 0) {
-        pr_trace("Failed to stop port %d\n", portno);
-        return status;
-    }
-
-    /* Try to report device type based on signature */
-    switch (sig) {
-    case AHCI_SIG_PM:
-        pr_trace("Port %d has port multiplier signature\n", portno);
-        return 0;   /* TODO */
-    case AHCI_SIG_ATA:
-        pr_trace("Port %d has ATA signature (SATA drive)\n", portno);
-        break;
-    default:
-        return 0;   /* TODO */
-    }
-
-    ncmdslots = hba->ncmdslots;
-    pagesize = vm_get_page_size();
-
-    /* Allocate our command list */
-    cmdlist_size = __ALIGN_UP(ncmdslots * AHCI_CMDENTRY_SIZE, pagesize);
-    tmp = vm_alloc_pageframe(cmdlist_size / pagesize);
-    cmdlist = PHYS_TO_VIRT(tmp);
-    if (tmp == 0) {
-        pr_trace("Failed to allocate cmdlist\n");
-        status = -ENOMEM;
-        goto done;
-    }
-
-    tmp = vm_alloc_pageframe(1);
-    fis = PHYS_TO_VIRT(tmp);
-    if (tmp == 0) {
-        pr_trace("Failed to allocate FIS\n");
-        status = -ENOMEM;
-        goto done;
-    }
-
-    memset(cmdlist, 0, cmdlist_size);
-    memset(fis, 0, AHCI_FIS_SIZE);
-    hba->cmdlist = cmdlist;
-
-    /* Set the registers */
-    port->clb = VIRT_TO_PHYS(cmdlist);
-    port->fb = VIRT_TO_PHYS(fis);
-
-    for (int i = 0; i < ncmdslots; ++i) {
-        cmdlist[i].prdtl = 1;
-        cmdlist[i].ctba = vm_alloc_pageframe(1);
-    }
-
-    /* Now try to start up the port */
-    if ((status = ahci_start_port(port)) != 0) {
-        pr_trace("Failed to start port %d\n", portno);
-        goto done;
-    }
-
-    ahci_identify(hba, port);
-    ahci_sata_register(hba, port);
-done:
-    if (status != 0 && cmdlist != NULL)
-        vm_free_pageframe(port->clb, cmdlist_size / pagesize);
-    if (status != 0 && fis != NULL)
-        vm_free_pageframe(port->fb, 1);
-
-    return status;
-}
-
-/*
- * Hard reset port and reinitialize
- * link.
- */
-static int
-ahci_reset_port(struct hba_port *port)
-{
-    uint32_t sctl, ssts;
-
-    /*
-     * Some odd behaviour may occur if a COMRESET is sent
-     * to the port while it is in an idle state...
-     * A workaround to this is to bring the port up
-     * then immediately transmit the COMRESET to the device.
-     */
-    ahci_start_port(port);
-    sctl = mmio_read32(&port->sctl);
-
-    /* Transmit COMRESET for ~2ms */
-    sctl = (sctl & ~0xF) | AHCI_DET_COMRESET;
-    mmio_write32(&port->sctl, sctl);
-    driver_tmr.msleep(2);
-
-    /* Stop transmission of COMRESET */
-    sctl &= ~AHCI_DET_COMRESET;
-    mmio_write32(&port->sctl, sctl);
-
-    /*
-     * Give around ~150ms for the link to become
-     * reestablished. Then make sure that it is
-     * actually established by checking PxSSTS.DET
-     */
-    driver_tmr.msleep(150);
-    ssts = mmio_read32(&port->ssts);
-    if (AHCI_PXSSTS_DET(ssts) != AHCI_DET_COMM) {
-        return -1;
-    }
-
-    return 0;
-}
-
-/*
- * Sets up devices connected to the physical ports
- * on the HBA.
- *
- * XXX: Since this is called after ahci_init_hba() which also
- *      resets the HBA, we'll need to reestablish the link
- *      between the devices and the HBA.
- */
-static int
-ahci_init_ports(struct ahci_hba *hba)
-{
-    struct hba_memspace *abar = hba->abar;
-    uint32_t ports_impl;
-    struct hba_port *port;
-
-    pr_trace("HBA supports max %d port(s)\n", hba->nports);
-    ports_impl = mmio_read32(&abar->pi);
-
-    /* Initialize active ports */
-    for (size_t i = 0; i < sizeof(abar->pi) * 8; ++i) {
-        if (!__TEST(ports_impl, __BIT(i))) {
-            continue;
-        }
-
-        port = &abar->ports[i];
-        if (ahci_reset_port(port) != 0) {
-            continue;
-        }
-
-        if (ahci_port_active(port)) {
-            ahci_init_port(hba, port, i);
-        }
-    }
-
-    return 0;
-}
-
-/*
- * Sets up the HBA
- */
-static int
-ahci_init_hba(struct ahci_hba *hba)
-{
-    struct hba_memspace *abar = hba->abar;
-    uint32_t cap;
-
-    /* Reset the HBA to ensure it is a known state */
-    ahci_hba_reset(hba);
-
-    /* Setup HBA structure and save some state */
-    cap = mmio_read32(&abar->cap);
-    hba->ncmdslots = AHCI_CAP_NCS(cap) + 1;
-    hba->nports = AHCI_CAP_NP(cap) + 1;
-
-    ahci_init_ports(hba);
-    return 0;
-}
-
-static int
-ahci_init(void)
-{
-    int status;
-    uint16_t cmdreg_bits;
-    uint32_t bar_size;
-    struct ahci_hba hba = {0};
-    struct pci_lookup ahci_lookup = {
-        .pci_class = 0x01,
-        .pci_subclass = 0x06
-    };
-
-    dev = pci_get_device(ahci_lookup, PCI_CLASS | PCI_SUBCLASS);
-
-    if (dev == NULL) {
-        return -1;
-    }
-
-    cmdreg_bits = PCI_BUS_MASTERING | PCI_MEM_SPACE;
-    pci_set_cmdreg(dev, cmdreg_bits);
-
-    if (req_timer(TIMER_GP, &driver_tmr) != TMRR_SUCCESS) {
-        pr_error("Failed to fetch general purpose timer\n");
-        return -1;
-    }
-
-    if (driver_tmr.msleep == NULL) {
-        pr_error("Timer does not have msleep()\n");
-        return -1;
-    }
-
-    if ((bar_size = pci_bar_size(dev, 5)) == 0) {
-        pr_error("Failed to fetch BAR size\n");
-        return -1;
-    }
-
-    status = bus_map(dev->bar[5], bar_size, 0, (void *)&hba.abar);
-    if (status != 0) {
-        pr_error("Failed to map BAR into higher half\n");
-        return -1;
-    }
-
-    pr_trace("AHCI HBA memspace @ 0x%p\n", hba.abar);
-    TAILQ_INIT(&sata_devs);
-    ahci_init_hba(&hba);
-    return 0;
-}
-
-DRIVER_EXPORT(ahci_init);