mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 15:26:40 +07:00
93de00fd1c
hdparm explicitely marks HDIO_[UNREGISTER,SCAN]_HWIF ioctls as DANGEROUS and given the number of bugs we can assume that there are no real users: * DMA has no chance of working because DMA resources are released by ide_unregister() and they are never allocated again. * Since ide_init_hwif_ports() is used for ->io_ports[] setup the ioctls don't work for almost all hosts with "non-standard" (== non ISA-like) layout of IDE taskfile registers (there is a lot of such host drivers). * ide_port_init_devices() is not called when probing IDE devices so: - drive->autotune is never set and IDE host/devices are not programmed for the correct PIO/DMA transfer modes (=> possible data corruption) - host specific I/O 32-bit and IRQ unmasking settings are not applied (=> possible data corruption) - host specific ->port_init_devs method is not called (=> no luck with ht6560b, qd65xx and opti621 host drivers) * ->rw_disk method is not preserved (=> no HPT3xxN chipsets support). * ->serialized flag is not preserved (=> possible data corruption when using icside, aec62xx (ATP850UF chipset), cmd640, cs5530, hpt366 (HPT3xxN chipsets), rz1000, sc1200, dtc2278 and ht6560b host drivers). * ->ack_intr method is not preserved (=> needed by ide-cris, buddha, gayle and macide host drivers). * ->sata_scr[] and sata_misc[] is cleared by ide_unregister() and it isn't initialized again (SiI3112 support needs them). * To issue an ioctl() there need to be at least one IDE device present in the system. * ->cable_detect method is not preserved + it is not called when probing IDE devices so cable detection is broken (however since DMA support is also broken it doesn't really matter ;-). * Some objects which may have already been freed in ide_unregister() are restored by ide_hwif_restore() (i.e. ->hwgroup). * ide_register_hw() may unregister unrelated IDE ports if free ide_hwifs[] slot cannot be found. * When IDE host drivers are modular unregistered port may be re-used by different host driver that owned it first causing subtle bugs. Since we now have a proper warm-plug support remove these ioctls, then remove no longer needed: - ide_register_hw() and ide_hwif_restore() functions - 'init_default' and 'restore' arguments of ide_unregister() - zeroeing of hwif->{dma,extra}_* fields in ide_unregister() As an added bonus IDE core code size shrinks by ~3kB (x86-32). v2: * fix ide_unregister() arguments in cleanup_module() (Andrew Morton). v3: * fix ide_unregister() arguments in palm_bk3710.c. Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
107 lines
2.0 KiB
C
107 lines
2.0 KiB
C
/*
|
|
* Copyright (c) 1996-2002 Russell King.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/blkdev.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/ide.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/ecard.h>
|
|
|
|
static void rapide_setup_ports(hw_regs_t *hw, void __iomem *base,
|
|
void __iomem *ctrl, unsigned int sz, int irq)
|
|
{
|
|
unsigned long port = (unsigned long)base;
|
|
int i;
|
|
|
|
for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
|
|
hw->io_ports[i] = port;
|
|
port += sz;
|
|
}
|
|
hw->io_ports[IDE_CONTROL_OFFSET] = (unsigned long)ctrl;
|
|
hw->irq = irq;
|
|
}
|
|
|
|
static int __devinit
|
|
rapide_probe(struct expansion_card *ec, const struct ecard_id *id)
|
|
{
|
|
ide_hwif_t *hwif;
|
|
void __iomem *base;
|
|
int ret;
|
|
u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
|
|
hw_regs_t hw;
|
|
|
|
ret = ecard_request_resources(ec);
|
|
if (ret)
|
|
goto out;
|
|
|
|
base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
|
|
if (!base) {
|
|
ret = -ENOMEM;
|
|
goto release;
|
|
}
|
|
|
|
hwif = ide_find_port((unsigned long)base);
|
|
if (hwif) {
|
|
memset(&hw, 0, sizeof(hw));
|
|
rapide_setup_ports(&hw, base, base + 0x818, 1 << 6, ec->irq);
|
|
hw.chipset = ide_generic;
|
|
hw.dev = &ec->dev;
|
|
|
|
ide_init_port_hw(hwif, &hw);
|
|
|
|
hwif->mmio = 1;
|
|
default_hwif_mmiops(hwif);
|
|
|
|
idx[0] = hwif->index;
|
|
|
|
ide_device_add(idx, NULL);
|
|
|
|
ecard_set_drvdata(ec, hwif);
|
|
goto out;
|
|
}
|
|
|
|
release:
|
|
ecard_release_resources(ec);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static void __devexit rapide_remove(struct expansion_card *ec)
|
|
{
|
|
ide_hwif_t *hwif = ecard_get_drvdata(ec);
|
|
|
|
ecard_set_drvdata(ec, NULL);
|
|
|
|
ide_unregister(hwif->index);
|
|
|
|
ecard_release_resources(ec);
|
|
}
|
|
|
|
static struct ecard_id rapide_ids[] = {
|
|
{ MANU_YELLOWSTONE, PROD_YELLOWSTONE_RAPIDE32 },
|
|
{ 0xffff, 0xffff }
|
|
};
|
|
|
|
static struct ecard_driver rapide_driver = {
|
|
.probe = rapide_probe,
|
|
.remove = __devexit_p(rapide_remove),
|
|
.id_table = rapide_ids,
|
|
.drv = {
|
|
.name = "rapide",
|
|
},
|
|
};
|
|
|
|
static int __init rapide_init(void)
|
|
{
|
|
return ecard_register_driver(&rapide_driver);
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("Yellowstone RAPIDE driver");
|
|
|
|
module_init(rapide_init);
|