I2O_IOP_QUIESCE_ALL(9) Message-based devices I2O_IOP_QUIESCE_ALL(9)NAME
i2o_iop_quiesce_all - Quiesce all I2O controllers on the system
Quiesce all I2O controllers which are connected to the system.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 I2O_IOP_QUIESCE_ALL(9)
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ATA_SLAVE_LINK_INIT(9) libata Library ATA_SLAVE_LINK_INIT(9)NAME
ata_slave_link_init - initialize slave link
int ata_slave_link_init(struct ata_port * ap);
port to initialize slave link for
Create and initialize slave link for ap. This enables slave link handling on the port.
In libata, a port contains links and a link contains devices. There is single host link but if a PMP is attached to it, there can be
multiple fan-out links. On SATA, there's usually a single device connected to a link but PATA and SATA controllers emulating TF based
interface can have two - master and slave.
However, there are a few controllers which don't fit into this abstraction too well - SATA controllers which emulate TF interface with both
master and slave devices but also have separate SCR register sets for each device. These controllers need separate links for physical link
handling (e.g. onlineness, link speed) but should be treated like a traditional M/S controller for everything else (e.g. command issue,
slave_link is libata's way of handling this class of controllers without impacting core layer too much. For anything other than physical
link handling, the default host link is used for both master and slave. For physical link handling, separate ap->slave_link is used. All
dirty details are implemented inside libata core layer. From LLD's POV, the only difference is that prereset, hardreset and postreset are
called once more for the slave link, so the reset sequence looks like the following.
prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) -> softreset(M) -> postreset(M) -> postreset(S)
Note that softreset is called only for the master. Softreset resets both M/S by definition, so SRST on master should handle both (the
standard method will work just fine).
Should be called before host is registered.
0 on success, -errno on failure.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 ATA_SLAVE_LINK_INIT(9)
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