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| author | Tejun Heo <tj@kernel.org> | 2009-09-15 21:17:02 +0200 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2009-10-06 06:26:26 +0200 |
| commit | fa5b561c4ea170caf9759109acc2e961a7e83bea (patch) | |
| tree | 55d872dc6bba8bce920f95d1a19bf441784c94ac /drivers/ata/libata-acpi.c | |
| parent | libata: cosmetic updates (diff) | |
| download | linux-fa5b561c4ea170caf9759109acc2e961a7e83bea.tar.xz linux-fa5b561c4ea170caf9759109acc2e961a7e83bea.zip | |
libata: implement more acpi filtering options
Currently libata-acpi can only filter DIPM among SATA feature enables
via _GTF. This patch adds the capability to filter out FPDMA non-zero
offset, in-order guarantee and auto-activation.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata/libata-acpi.c')
| -rw-r--r-- | drivers/ata/libata-acpi.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c index 719e7d237dc8..960c6a7caa83 100644 --- a/drivers/ata/libata-acpi.c +++ b/drivers/ata/libata-acpi.c @@ -22,7 +22,7 @@ static unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT; module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644); -MODULE_PARM_DESC(acpi_gtf_filter, "filter mask for ACPI _GTF commands, set to filter out (0x1=set xfermode, 0x2=lock/freeze lock, 0x4=DIPM)"); +MODULE_PARM_DESC(acpi_gtf_filter, "filter mask for ACPI _GTF commands, set to filter out (0x1=set xfermode, 0x2=lock/freeze lock, 0x4=DIPM, 0x8=FPDMA non-zero offset, 0x10=FPDMA DMA Setup FIS auto-activate)"); #define NO_PORT_MULT 0xffff #define SATA_ADR(root, pmp) (((root) << 16) | (pmp)) @@ -637,12 +637,23 @@ static int ata_acpi_filter_tf(const struct ata_taskfile *tf, return 1; } - if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_DIPM) { + if (tf->command == ATA_CMD_SET_FEATURES && + tf->feature == SETFEATURES_SATA_ENABLE) { /* inhibit enabling DIPM */ - if (tf->command == ATA_CMD_SET_FEATURES && - tf->feature == SETFEATURES_SATA_ENABLE && + if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_DIPM && tf->nsect == SATA_DIPM) return 1; + + /* inhibit FPDMA non-zero offset */ + if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET && + (tf->nsect == SATA_FPDMA_OFFSET || + tf->nsect == SATA_FPDMA_IN_ORDER)) + return 1; + + /* inhibit FPDMA auto activation */ + if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_FPDMA_AA && + tf->nsect == SATA_FPDMA_AA) + return 1; } return 0; |