diff options
| author | Gary R Hook <ghook@amd.com> | 2017-03-10 12:28:18 -0600 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-03-16 17:43:08 +0800 |
| commit | 7c468447f40645fbf2a033dfdaa92b1957130d50 (patch) | |
| tree | c9cd9c1ca6222a07af4a3eff12651d7c0f81eadd /drivers/crypto/ccp/ccp-dev.c | |
| parent | 28b62b1458685d8f68f67d9b2d511bf8fa32b746 (diff) | |
crypto: ccp - Assign DMA commands to the channel's CCP
The CCP driver generally uses a round-robin approach when
assigning operations to available CCPs. For the DMA engine,
however, the DMA mappings of the SGs are associated with a
specific CCP. When an IOMMU is enabled, the IOMMU is
programmed based on this specific device.
If the DMA operations are not performed by that specific
CCP then addressing errors and I/O page faults will occur.
Update the CCP driver to allow a specific CCP device to be
requested for an operation and use this in the DMA engine
support.
Cc: <stable@vger.kernel.org> # 4.9.x-
Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/ccp/ccp-dev.c')
| -rw-r--r-- | drivers/crypto/ccp/ccp-dev.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/crypto/ccp/ccp-dev.c b/drivers/crypto/ccp/ccp-dev.c index 511ab042b5e7..92d1c6959f08 100644 --- a/drivers/crypto/ccp/ccp-dev.c +++ b/drivers/crypto/ccp/ccp-dev.c @@ -283,11 +283,14 @@ EXPORT_SYMBOL_GPL(ccp_version); */ int ccp_enqueue_cmd(struct ccp_cmd *cmd) { - struct ccp_device *ccp = ccp_get_device(); + struct ccp_device *ccp; unsigned long flags; unsigned int i; int ret; + /* Some commands might need to be sent to a specific device */ + ccp = cmd->ccp ? cmd->ccp : ccp_get_device(); + if (!ccp) return -ENODEV; |