linux-toradex.git/drivers/ata/ahci.c, branch v4.9.67

ahci: Acer SA5-271 SSD Not Detected Fix

2017-06-14T13:06:00+00:00

commit 8bfd174312629866efa535193d9e563768ff4307 upstream.

(Correction in this resend: fixed function name acer_sa5_271_workaround; fixed
 the always-true condition in the function; fixed description.)

On the Acer Switch Alpha 12 (model number: SA5-271), the internal SSD may not
get detected because the port_map and CAP.nr_ports combination causes the driver
to skip the port that is actually connected to the SSD. More specifically,
either all SATA ports are identified as DUMMY, or all ports get ``link down''
and never get up again.

This problem occurs occasionally. When this problem occurs, CAP may hold a
value of 0xC734FF00 or 0xC734FF01 and port_map may hold a value of 0x00 or 0x01.
When this problem does not occur, CAP holds a value of 0xC734FF02 and port_map
may hold a value of 0x07. Overriding the CAP value to 0xC734FF02 and port_map to
0x7 significantly reduces the occurrence of this problem.

Link: https://bugzilla.kernel.org/attachment.cgi?id=253091
Signed-off-by: Sui Chen 
Tested-by: Damian Ivanov 
Signed-off-by: Tejun Heo 
Signed-off-by: Greg Kroah-Hartman

ahci: always fall back to single-MSI mode

2016-11-21T16:06:57+00:00

Don't try to guess what the errors from pci_irq_alloc_vectors mean, as
that's too fragile.  Instead always try allocating a single vector
when multi-MSI mode fails.  This makes various intel Desktop and
Laptop CPUs use MSI again.

Signed-off-by: Christoph Hellwig 
Reported-by: Michael Marley 
Tested-by: Michael Marley 
Fixes: 0b9e2988ab22 ("ahci: use pci_alloc_irq_vectors")
Signed-off-by: Tejun Heo

ahci: fix the single MSI-X case in ahci_init_one

2016-10-25T15:43:07+00:00

We need to make sure hpriv->irq is set properly if we don't use per-port
vectors, so switch from blindly assigning pdev->irq to using
pci_irq_vector, which handles all interrupt types correctly.

Signed-off-by: Christoph Hellwig 
Reported-by: Robert Richter 
Tested-by: Robert Richter 
Tested-by: David Daney 
Fixes: 0b9e2988ab22 ("ahci: use pci_alloc_irq_vectors")
Signed-off-by: Tejun Heo

ahci: fix nvec check

2016-10-20T17:40:14+00:00

commit 17a51f12 ("ahci: only try to use multi-MSI mode if there is more
than 1 port") lead to a case where nvec isn't initialized before it's
used.  Fix this by moving the check into the n_ports conditional.

Reported-and-reviewed-by Colin Ian King 
Signed-off-by: Christoph Hellwig 
Signed-off-by: Tejun Heo

ahci: only try to use multi-MSI mode if there is more than 1 port

2016-10-19T17:18:16+00:00

We should only try to allocate multiple MSI or MSI-X vectors if the device
actually has multiple ports.  Otherwise pci_alloc_irq_vectors will return
a single vector due to n_ports = 1, in which case we shouldn't set the
AHCI_HFLAG_MULTI_MSI flag.

Signed-off-by: Christoph Hellwig 
Fixes: 0b9e2988 ("ahci: use pci_alloc_irq_vectors")
Reported-by: Emmanuel Benisty 
Tested-by: Emmanuel Benisty 
Signed-off-by: Tejun Heo

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

ata: Use IS_ENABLED() instead of checking for built-in or module

2016-05-27T15:27:23+00:00

The IS_ENABLED() macro checks if a Kconfig symbol has been enabled either
built-in or as a module, use that macro instead of open coding the same.

Signed-off-by: Javier Martinez Canillas 
Signed-off-by: Tejun Heo

AHCI: Remove obsolete Intel Lewisburg SATA RAID device IDs

2016-03-11T17:31:49+00:00

These PCI device IDs have been removed from the Intel Lewisburg design
specification. They are no longer needed.

Signed-off-by: Scott Lawson 
Signed-off-by: Tejun Heo

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

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

ahci: Workaround for ThunderX Errata#22536

2016-02-29T21:16:26+00:00

Due to Errata in ThunderX, HOST_IRQ_STAT should be
cleared before leaving the interrupt handler.
The patch attempts to satisfy the need.

Changes from V2:
	- removed newfile
	- code is now under CONFIG_ARM64

Changes from V1:
	- Rebased on top of libata/for-4.6
        - Moved ThunderX intr handler to new file

tj: Minor adjustments to comments.

Signed-off-by: Tirumalesh Chalamarla 
Signed-off-by: Tejun Heo