aboutsummaryrefslogtreecommitdiff
path: root/drivers/ata/ahci.c
AgeCommit message (Collapse)Author
2006-12-20[libata] Move some PCI IDs from sata_nv to ahciPeer Chen
The content of memory map io of BAR5 have been change from MCP65 then sata_nv can't work fine on the platform based on MCP65 and MCP67, so move their IDs from sata_nv.c to ahci.c. Signed-off-by: Peer Chen <pchen@nvidia.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-16[PATCH] ahci: do not mangle saved HOST_CAP while resetting controllerTejun Heo
Do not mangle with HOST_CAP while resetting controller. The code is there for a historical reason. The mangling breaks controller feature detection and 0 PORTS_IMPL workaround code. This problem was spotted by Manoj Kasichainula. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Manoj Kasichainula <manoj@io.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-03[PATCH] ahci: do not powerdown during initializationTejun Heo
ahci_init_controller() calls ahci_deinit_port() to make sure the controller is stopped before initializing the controller. In turn, ahci_deinit_port() invokes ahci_power_down() to power down the port. If the controller supports slumber mode, the link is put into it. Unfortunately, some devices don't implement link powersaving mode properly and show erratic behavior after link is put into slumber mode. For example, HL-DT-ST DVD-RAM GSA-H30N completely locks up on slumber transition and can only be recovered with the *REAL* hard reset - power removal and reapply. Note that this makes the first probing reset different from all others. If the above dvd-ram is hotplugged after ahci is initialized, no problem occurs because ahci is already fully initialized with phy powered up. So, this might also be the reason for other weird AHCI initial probing abnormalities. This patch moves power up/down out of port init/deinit and call them only when needed. Power down is now called only when suspending. As system suspend usually involves powering down 12v for storage devices, this shouldn't cause problem even if the attached device doesn't support slumber mode. However, in partial power management and suspend failure cases, devices might lock up after suspend attempt. I thought about removing transition to slumber mode altogether but ahci spec mandates it before HBA D3 state transition. Blacklisting such devices might be the solution. Signed-off-by: Tejun Heo <htejun@gmail.com>
2006-12-01[PATCH] ahci: honor PORTS_IMPL on ICH8sTejun Heo
Some ICH8s use non-linear port mapping. ahci driver didn't use to honor PORTS_IMPL and this made ports after hole nonfunctional. This patch makes ahci mark those ports as dummy and properly initialize all the implemented ports after the dummies. As it's unknown whether other AHCIs implement PORTS_IMPL register properly, new board id board_ahci_pi is added and selectively applied to ICH8s. All other AHCIs continue to use linear mapping regardless of PORTS_IMPL value. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Robin H. Johnson <robbat2@gentoo.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-01[PATCH] ahci: preserve PORTS_IMPL over host resetsTejun Heo
Instead of writing 0xf blindly, preserve the content of write-once PORTS_IMPL register over host resets. This patch is taken from Jeff Garzik's AHCI init update patch. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-01[libata] ahci: Match PCI class code for AHCIJeff Garzik
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-01[PATCH] ahci: update ahci-vt8251 reset sequenceTejun Heo
ahci-vt8251 * requires hardreset after PHY status change * doesn't clear BSY on signature FIS after hardreset * needs SError cleared for the port to operate after hardreset This patch implements ahci_vt8251_hardreset() and sets ATA_FLAG_HRST_TO_RESUME to handle the above behaviors. This fixes EH including hotplug on vt8251. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-01[PATCH] ahci: kill AHCI_FLAG_RESET_NEEDS_CLOTejun Heo
Now that ahci_softreset() is fixed to automatically perform CLO if BSY/DRQ is set on entry, AHCI_FLAG_RESET_NEEDS_CLO is redundant. Kill it. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-11-29[PATCH] ahci: ignore PORT_IRQ_IF_ERR on JMB controllersTejun Heo
JMicron AHCI controllers set PORT_IRQ_IF_ERR on device errors. The IRQ status bit indicates interface error or protocol mismatch and ahci driver interprets it into AC_ERR_ATA_BUS. So, whenever an ATAPI device raises check condition, ahci interprets it as ATA bus error and thus resets it which, in turn, raises check condition thus creating a reset loop and rendering the device unuseable. This patch makes JMB controllers ignore PORT_IRQ_IF_ERR when interpreting error condition. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Justin Tsai <justin@jmicron.com>
2006-11-28[PATCH] ahci: AHCI mode SATA patch for Intel ICH9Jason Gaston
This patch adds the Intel ICH9 AHCI controller DID's for SATA support. Signed-off-by: Jason Gaston <jason.d.gaston@intel.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-11-02[libata] Add support for AHCI controllers of MCP67.Peer Chen
Signed-off-by: Peer Chen <pchen@nvidia.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-11-01[PATCH] ahci: fix status register check in ahci_softresetTejun Heo
ahci_softreset() used to use ahci_tf_read() which reads D2H_REG area to check for the Status register. However, this area is zeroed on initialization and not set by initial signature FIS. Replace it with ahci_check_status(). This bug prevented CLO code from being activated whenever BSY and/or DRQ is set prior to softreset. This fix makes AHCI_FLAG_RESET_NEEDS_CLO flag redundant. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-10-21[PATCH] ahci: readability tweakAlan Cox
Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-10-05IRQ: Maintain regs pointer globally rather than passing to IRQ handlersDavid Howells
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-09-27[libata] Use new PCI_VDEVICE() macro to dramatically shorten ID listsJeff Garzik
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-08-31[libata] Trim trailing whitespace.Jeff Garzik
2006-08-24libata: Grand renaming.Jeff Garzik
The biggest change is that ata_host_set is renamed to ata_host. * ata_host_set => ata_host * ata_probe_ent->host_flags => ata_probe_ent->port_flags * ata_probe_ent->host_set_flags => ata_probe_ent->_host_flags * ata_host_stats => ata_port_stats * ata_port->host => ata_port->scsi_host * ata_port->host_set => ata_port->host * ata_port_info->host_flags => ata_port_info->flags * ata_(.*)host_set(.*)\(\) => ata_\1host\2() The leading underscore in ata_probe_ent->_host_flags is to avoid reusing ->host_flags for different purpose. Currently, the only user of the field is libata-bmdma.c and probe_ent itself is scheduled to be removed. ata_port->host is reused for different purpose but this field is used inside libata core proper and of different type. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-08-10Move libata to drivers/ata.Jeff Garzik