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ocxl: Use pci core's DVSEC functionality

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Reduce maintenance burden of DVSEC query implementation by using the
centralized PCI core implementation.

There are two obvious places to simply drop in the new core
implementation. There remains find_dvsec_from_pos() which would benefit
from using a core implementation. As that change is less trivial it is
reserved for later.

Cc: linuxppc-dev@lists.ozlabs.org
Cc: Andrew Donnellan <ajd@linux.ibm.com>
Acked-by: Frederic Barrat <fbarrat@linux.ibm.com> (v1)
Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
Reviewed-by: Andrew Donnellan <ajd@linux.ibm.com>
Link: https://lore.kernel.org/r/163379789065.692348.7117946955275586530.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Ben Widawsky 2021-10-09 09:44:50 -07:00 committed by Dan Williams
parent 55006a2c94
commit c6d7e1341c
2 changed files with 3 additions and 13 deletions
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3
arch/powerpc/platforms/powernv/ocxl.c
View File

@ -107,7 +107,8 @@ static int get_max_afu_index(struct pci_dev *dev, int *afu_idx)
int pos;
u32 val;
pos = find_dvsec_from_pos(dev, OCXL_DVSEC_FUNC_ID, 0);
pos = pci_find_dvsec_capability(dev, PCI_VENDOR_ID_IBM,
OCXL_DVSEC_FUNC_ID);
if (!pos)
return -ESRCH;

13
drivers/misc/ocxl/config.c
View File

@ -33,18 +33,7 @@
static int find_dvsec(struct pci_dev *dev, int dvsec_id)
{
int vsec = 0;
u16 vendor, id;
while ((vsec = pci_find_next_ext_capability(dev, vsec,
OCXL_EXT_CAP_ID_DVSEC))) {
pci_read_config_word(dev, vsec + OCXL_DVSEC_VENDOR_OFFSET,
&vendor);
pci_read_config_word(dev, vsec + OCXL_DVSEC_ID_OFFSET, &id);
if (vendor == PCI_VENDOR_ID_IBM && id == dvsec_id)
return vsec;
}
return 0;
return pci_find_dvsec_capability(dev, PCI_VENDOR_ID_IBM, dvsec_id);
}
static int find_dvsec_afu_ctrl(struct pci_dev *dev, u8 afu_idx)