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| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2023-10-18 17:56:21 +0900 |
|---|---|---|
| committer | Krzysztof Wilczyński <kwilczynski@kernel.org> | 2023-10-20 12:12:50 +0000 |
| commit | 7873b49b41b92edb3395bff9a528eaf89da5e41c (patch) | |
| tree | eb1410cf212bcee7ba0697f7c3a57c3871c70607 /drivers/pci/controller/dwc/pcie-designware.h | |
| parent | 1a9745476caea2374e0c6ab8285c192158e52d2d (diff) | |
PCI: dwc: endpoint: Add multiple PFs support for dbi2
The commit 24ede430fa49 ("PCI: designware-ep: Add multiple PFs support
for DWC") added .func_conf_select() to get the configuration space of
different PFs and assumed that the offsets between dbi and dbi2 would
be the same.
However, Renesas R-Car Gen4 PCIe controllers have different offsets of
function 1: dbi (+0x1000) and dbi2 (+0x800). To get the offset for dbi2,
add .get_dbi2_offset() and dw_pcie_ep_get_dbi2_offset().
Note:
- .func_conf_select() should be renamed later.
- dw_pcie_ep_get_dbi2_offset() will call .func_conf_select()
if .get_dbi2_offset() doesn't exist for backward compatibility.
- dw_pcie_writeX_{dbi/dbi2} APIs accepted the func_no argument,
so that these offset calculations are contained in the API
definitions itself as it should.
Link: https://lore.kernel.org/linux-pci/20231018085631.1121289-6-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Diffstat (limited to 'drivers/pci/controller/dwc/pcie-designware.h')
| -rw-r--r-- | drivers/pci/controller/dwc/pcie-designware.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index ef0b2efa9f93..6189884b4efa 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -341,6 +341,7 @@ struct dw_pcie_ep_ops { * driver. */ unsigned int (*func_conf_select)(struct dw_pcie_ep *ep, u8 func_no); + unsigned int (*get_dbi2_offset)(struct dw_pcie_ep *ep, u8 func_no); }; struct dw_pcie_ep_func { |