linux-toradex.git/drivers/ata/libahci.c, branch v4.9.30

ahci: use pci_alloc_irq_vectors

2016-09-06T16:38:17+00:00

Use the new pci_alloc_irq_vectors API to allocate MSI-X and MSI vectors.
The big advantage over the old code is that we can use the same API for
MSI and MSI-X, and that we don't need to store the MSI-X vector mapping
in driver-private data structures.

This first conversion keeps the probe order as-is: MSI-X multi vector,
MSI multi vector, MSI single vector, MSI-X single vector and last a
single least legacy interrupt line.  There is one small change of
behavior: we now check the "MSI Revert to Single Message" flag for
MSI-X in addition to MSI.

Because the API to find the Linux IRQ number for a MSI/MSI-X vector
is PCI specific, but libahaci is bus-agnostic I had to a
get_irq_vector function pointer to struct ahci_host_priv.  The
alternative would be to move the multi-vector case of ahci_host_activate
to ahci.c and just call ata_host_activate directly from the others
users of ahci_host_activate.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Tejun Heo

Merge branch 'master' into for-4.9

2016-09-06T16:35:56+00:00

ahci: disable correct irq for dummy ports

2016-08-11T17:45:31+00:00

irq already contains the interrupt number for the port, don't add the
port index to it.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Tejun Heo 
Fixes: d684a90d38e2 ("ahci: per-port msix support")
Cc: stable@vger.kernel.org v4.5+

ahci: also use a per-port lock for the multi-MSIX case

2016-08-11T16:37:31+00:00

Signed-off-by: Christoph Hellwig 
Signed-off-by: Tejun Heo

AHCI: Clear GHC.IS to prevent unexpectly asserting INTx

2016-07-20T15:10:10+00:00

Due to PCI subsystem behaviour, unloading AHCI driver will disable
MSI and enable INTx. When HBA supports MSIx or Multiple MSI, Driver's
irq handler doesn't clear GHC.IS register. It works well when reading or
writing data and GHC.IS is always non-zero. But when unloading driver
(or any other operation which causes disable MSIx and enable INTx), PCI
 subsystem uses config write(Rx04.bit10) to enable INTx. Because
GHC.IS is non-zero, HBA will falsely assume some port needs interrupt
service. Then it asserts INTx. To make things worse, when AHCI controller
shares the same interrupt pin with other PCI device, that PCI device's ISR
will be called and nobody de-asserts previous INTx.
This patch clears GHC.IS in ahci_port_stop() even when using MSIx or
MMSI to prevent this case. It ensures GHC.IS is zero before PCI subsystem
enables INTx.

tj: Minor updates to the comment.

Signed-off-by: Raymond Pang 
Signed-off-by: Tejun Heo

libata: use ata_is_ncq() accessors

2016-07-14T14:44:57+00:00

Use accessor functions instead of the raw value.

Signed-off-by: Hannes Reinecke 
Signed-off-by: Christoph Hellwig 
Signed-off-by: Tejun Heo

Merge branch 'for-4.6-fixes' into for-4.7

2016-05-13T21:20:48+00:00

libahci: save port map for forced port map

2016-04-01T14:30:30+00:00

In usecases where force_port_map is used saved_port_map is never set,
resulting in not programming the PORTS_IMPL register as part of initial
config. This patch fixes this by setting it to port_map even in case
where force_port_map is used, making it more inline with other parts of
the code.

Fixes: 566d1827df2e ("libata: disable forced PORTS_IMPL for >= AHCI 1.3")
Cc: stable@vger.kernel.org # v4.5+
Signed-off-by: Srinivas Kandagatla 
Acked-by: Tejun Heo 
Reviewed-by: Andy Gross 
Signed-off-by: Tejun Heo

libata: Fixup awkward whitespace in warning by removing line continuation.

2016-03-30T17:01:12+00:00

Signed-off-by: Sander Eikelenboom 
Signed-off-by: Tejun Heo

Merge branch 'for-4.5-fixes' into for-4.6

2016-03-11T17:30:17+00:00