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| author | Varun Sethi <Varun.Sethi@freescale.com> | 2013-05-30 12:45:13 (GMT) |
|---|---|---|
| committer | Fleming Andrew-AFLEMING <AFLEMING@freescale.com> | 2013-05-30 22:35:55 (GMT) |
| commit | a87f76cb563a5acbea9bc46f4f676888cfa3f719 (patch) | |
| tree | bc3340b0bd35d4e8d690f69d75a80586a3de3047 | |
| parent | 20e8259f58873f032c7a2753602ec2bfc15e27a8 (diff) | |
| download | linux-fsl-qoriq-a87f76cb563a5acbea9bc46f4f676888cfa3f719.tar.xz | |
iommu/fsl : Enable PAMU window for all possible LIODNS
The "enable_rmaining_liodn" function opens the PAMU window for all possible
LIODN values. This provides a workaround to the bug in u-boot, where
it fails to program LIODN values (in device tree), for cases where packet
frame descriptors from FMAN can be enqueued directly to hardware blocks like SEC
and RMAN.
Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com>
Change-Id: I454d37dc7b7bc5bc74de0af815e19eb2796937b8
Reviewed-on: http://git.am.freescale.net:8181/2789
Tested-by: Review Code-CDREVIEW <CDREVIEW@freescale.com>
Reviewed-by: Bulie Radu-Andrei-B37577 <Radu.Bulie@freescale.com>
Reviewed-by: Yoder Stuart-B08248 <stuart.yoder@freescale.com>
Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
Tested-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
| -rw-r--r-- | drivers/iommu/fsl_pamu.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/iommu/fsl_pamu.c b/drivers/iommu/fsl_pamu.c index 6f32f6a..e4be15a 100644 --- a/drivers/iommu/fsl_pamu.c +++ b/drivers/iommu/fsl_pamu.c @@ -749,6 +749,32 @@ int setup_one_pamu(unsigned long pamu_reg_base, unsigned long pamu_reg_size, return 0; } +/* + * Primarily to Enable LIODNs which u-boot didn't update in the device tree. + */ +static void __init enable_remaining_liodns(void) +{ + int liodn; + struct paace *ppaace; + + for (liodn = 0; liodn < PAACE_NUMBER_ENTRIES; liodn++) { + ppaace = pamu_get_ppaace(liodn); + if (!get_bf(ppaace->addr_bitfields, PAACE_AF_V)) { + pamu_init_ppaace(ppaace); + /* window size is 2^(WSE+1) bytes */ + set_bf(ppaace->addr_bitfields, PPAACE_AF_WSE, 35); + ppaace->wbah = 0; + set_bf(ppaace->addr_bitfields, PPAACE_AF_WBAL, 0); + set_bf(ppaace->impl_attr, PAACE_IA_ATM, + PAACE_ATM_NO_XLATE); + set_bf(ppaace->addr_bitfields, PAACE_AF_AP, + PAACE_AP_PERMS_ALL); + mb(); + pamu_enable_liodn(liodn); + } + } +} + /* Enable all device LIODNS */ static void __init setup_liodns(void) { @@ -792,6 +818,16 @@ static void __init setup_liodns(void) pamu_enable_liodn(liodn); } } + + /* + * Currently u-boot doesn't fixup LIODNs for cases + * where a frame is passed to a hardware block from + * another hardware block. For example, frame can + * be passed from FMAN rx port to SEC or RMAN. So, + * as a work around we enable all the possible LIODN + * values. + */ + enable_remaining_liodns(); } irqreturn_t pamu_av_isr(int irq, void *arg) |