diff options
| author | Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> | 2017-11-07 18:23:42 -0800 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-11-12 09:03:05 +1100 |
| commit | 51b537124fc24074aee67cae9ca94ec4d9c204fc (patch) | |
| tree | f4cd2e48f6d3e2e798d617c2ba64497845121d94 /arch/powerpc/platforms | |
| parent | e34917fbee1226144c94413697ddbf2d5b06d0d3 (diff) | |
powerpc/vas: Validate window credits
NX-842, the only user of VAS, sets the window credits to default values
but VAS should check the credits against the possible max values.
The VAS_WCREDS_MIN is not needed and can be dropped.
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/platforms')
| -rw-r--r-- | arch/powerpc/platforms/powernv/vas-window.c | 6 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powernv/vas.h | 4 |
2 files changed, 8 insertions, 2 deletions
diff --git a/arch/powerpc/platforms/powernv/vas-window.c b/arch/powerpc/platforms/powernv/vas-window.c index cec7ab7119df..a2fe120ac06d 100644 --- a/arch/powerpc/platforms/powernv/vas-window.c +++ b/arch/powerpc/platforms/powernv/vas-window.c @@ -738,6 +738,9 @@ static bool rx_win_args_valid(enum vas_cop_type cop, if (attr->rx_fifo_size > VAS_RX_FIFO_SIZE_MAX) return false; + if (attr->wcreds_max > VAS_RX_WCREDS_MAX) + return false; + if (attr->nx_win) { /* cannot be fault or user window if it is nx */ if (attr->fault_win || attr->user_win) @@ -927,6 +930,9 @@ static bool tx_win_args_valid(enum vas_cop_type cop, if (cop > VAS_COP_TYPE_MAX) return false; + if (attr->wcreds_max > VAS_TX_WCREDS_MAX) + return false; + if (attr->user_win && (cop != VAS_COP_TYPE_FTW || attr->rsvd_txbuf_count)) return false; diff --git a/arch/powerpc/platforms/powernv/vas.h b/arch/powerpc/platforms/powernv/vas.h index 38dee5d50f31..fea0de44f076 100644 --- a/arch/powerpc/platforms/powernv/vas.h +++ b/arch/powerpc/platforms/powernv/vas.h @@ -106,8 +106,8 @@ * * TODO: Needs tuning for per-process credits */ -#define VAS_WCREDS_MIN 16 -#define VAS_WCREDS_MAX ((64 << 10) - 1) +#define VAS_RX_WCREDS_MAX ((64 << 10) - 1) +#define VAS_TX_WCREDS_MAX ((4 << 10) - 1) #define VAS_WCREDS_DEFAULT (1 << 10) /* |