diff options
| author |   Ian Munsie <imunsie@au1.ibm.com> | 2016-06-08 15:09:54 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2016-06-16 23:10:26 +1000 |
| commit | b385c9e971468eb8816b26742449d6d1e49f55f1 (patch) | |
| tree | c78d0b179f8fb8e0956a6659df185f3d9e754cf8 /drivers/misc/cxl | |
| parent | cxl: Abstract the differences between the PSL and XSL (diff) | |
| download | linux-dev-b385c9e971468eb8816b26742449d6d1e49f55f1.tar.xz linux-dev-b385c9e971468eb8816b26742449d6d1e49f55f1.zip | |
cxl: Add support for CAPP DMA mode
This adds support for using CAPP DMA mode, which is required for XSL
based cards such as the Mellanox CX4 to function.
This is currently an RFC as it depends on the corresponding support to
be merged into skiboot first, which was submitted here:
http://patchwork.ozlabs.org/patch/625582/
In the event that the skiboot on the system does not have the above
support, it will indicate as such in the kernel log and abort the init
process.
Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/misc/cxl')
| -rw-r--r-- | drivers/misc/cxl/cxl.h | 1 | ||||
| -rw-r--r-- | drivers/misc/cxl/pci.c | 4 |
2 files changed, 4 insertions, 1 deletions
diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h index 790faebf44dc..ce2b9d513069 100644 --- a/drivers/misc/cxl/cxl.h +++ b/drivers/misc/cxl/cxl.h @@ -543,6 +543,7 @@ struct cxl_service_layer_ops { void (*debugfs_stop_trace)(struct cxl *adapter); void (*write_timebase_ctrl)(struct cxl *adapter); u64 (*timebase_read)(struct cxl *adapter); + int capi_mode; }; struct cxl_native { diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c index 556718d7915f..648817a2e219 100644 --- a/drivers/misc/cxl/pci.c +++ b/drivers/misc/cxl/pci.c @@ -1249,7 +1249,7 @@ static int cxl_configure_adapter(struct cxl *adapter, struct pci_dev *dev) if ((rc = adapter->native->sl_ops->adapter_regs_init(adapter, dev))) goto err; - if ((rc = pnv_phb_to_cxl_mode(dev, OPAL_PHB_CAPI_MODE_CAPI))) + if ((rc = pnv_phb_to_cxl_mode(dev, adapter->native->sl_ops->capi_mode))) goto err; /* If recovery happened, the last step is to turn on snooping. @@ -1293,6 +1293,7 @@ static const struct cxl_service_layer_ops psl_ops = { .debugfs_stop_trace = cxl_stop_trace, .write_timebase_ctrl = write_timebase_ctrl_psl, .timebase_read = timebase_read_psl, + .capi_mode = OPAL_PHB_CAPI_MODE_CAPI, }; static const struct cxl_service_layer_ops xsl_ops = { @@ -1300,6 +1301,7 @@ static const struct cxl_service_layer_ops xsl_ops = { .debugfs_add_adapter_sl_regs = cxl_debugfs_add_adapter_xsl_regs, .write_timebase_ctrl = write_timebase_ctrl_xsl, .timebase_read = timebase_read_xsl, + .capi_mode = OPAL_PHB_CAPI_MODE_DMA, }; static void set_sl_ops(struct cxl *adapter, struct pci_dev *dev) |