| Message ID | 20230313225103.30512-11-Sergey.Semin@baikalelectronics.ru (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | dt-bindings: net: dwmac: Extend clocks, props desc and constraints | expand |
On 13/03/2023 23:50, Serge Semin wrote: > Currently none of the AXI-bus non-boolean DT-properties have constraints > defined meanwhile they can be specified at least based on the > corresponding device configs. Let's do that: > + snps,wr_osr_lm/snps,rd_osr_lmt - maximum number of outstanding AXI-bus > read/write requests is limited with the IP-core synthesize parameter > AXI_MAX_{RD,WR}_REQ. DW MAC/GMAC: <= 16, DW Eth QoS: <= 32, DW xGMAC: <= > 64. The least restrictive constraint is defined since the DT-schema is > common for all IP-cores. > + snps,blen - array of the burst lengths supported by the AXI-bus. Values > are limited by the AXI3/4 bus standard, available AXI/System bus CSR flags > and the AXI-bus IP-core synthesize config . All DW *MACs support setting > the burst length within the set: 4, 8, 16, 32, 64, 128, 256. If some burst > length is unsupported a zero value can be specified instead in the array. > > Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> > > snps,kbbe: > $ref: /schemas/types.yaml#/definitions/uint32 > @@ -501,6 +507,8 @@ properties: > this is a vector of supported burst length. > minItems: 7 > maxItems: 7 > + items: > + enum: [256, 128, 64, 32, 16, 8, 4, 0] Increasing order. Best regards, Krzysztof
On Thu, Mar 16, 2023 at 09:06:32AM +0100, Krzysztof Kozlowski wrote: > On 13/03/2023 23:50, Serge Semin wrote: > > Currently none of the AXI-bus non-boolean DT-properties have constraints > > defined meanwhile they can be specified at least based on the > > corresponding device configs. Let's do that: > > + snps,wr_osr_lm/snps,rd_osr_lmt - maximum number of outstanding AXI-bus > > read/write requests is limited with the IP-core synthesize parameter > > AXI_MAX_{RD,WR}_REQ. DW MAC/GMAC: <= 16, DW Eth QoS: <= 32, DW xGMAC: <= > > 64. The least restrictive constraint is defined since the DT-schema is > > common for all IP-cores. > > + snps,blen - array of the burst lengths supported by the AXI-bus. Values > > are limited by the AXI3/4 bus standard, available AXI/System bus CSR flags > > and the AXI-bus IP-core synthesize config . All DW *MACs support setting > > the burst length within the set: 4, 8, 16, 32, 64, 128, 256. If some burst > > length is unsupported a zero value can be specified instead in the array. > > > > Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> > > > > > > snps,kbbe: > > $ref: /schemas/types.yaml#/definitions/uint32 > > @@ -501,6 +507,8 @@ properties: > > this is a vector of supported burst length. > > minItems: 7 > > maxItems: 7 > > + items: > > + enum: [256, 128, 64, 32, 16, 8, 4, 0] > > Increasing order. Ok. -Serge(y) > > Best regards, > Krzysztof >
diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml index d1b2910b799b..f24718a8d184 100644 --- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml +++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml @@ -484,11 +484,17 @@ properties: $ref: /schemas/types.yaml#/definitions/uint32 description: max write outstanding req. limit + default: 1 + minimum: 1 + maximum: 64 snps,rd_osr_lmt: $ref: /schemas/types.yaml#/definitions/uint32 description: max read outstanding req. limit + default: 1 + minimum: 1 + maximum: 64 snps,kbbe: $ref: /schemas/types.yaml#/definitions/uint32 @@ -501,6 +507,8 @@ properties: this is a vector of supported burst length. minItems: 7 maxItems: 7 + items: + enum: [256, 128, 64, 32, 16, 8, 4, 0] snps,fb: $ref: /schemas/types.yaml#/definitions/flag
Currently none of the AXI-bus non-boolean DT-properties have constraints defined meanwhile they can be specified at least based on the corresponding device configs. Let's do that: + snps,wr_osr_lm/snps,rd_osr_lmt - maximum number of outstanding AXI-bus read/write requests is limited with the IP-core synthesize parameter AXI_MAX_{RD,WR}_REQ. DW MAC/GMAC: <= 16, DW Eth QoS: <= 32, DW xGMAC: <= 64. The least restrictive constraint is defined since the DT-schema is common for all IP-cores. + snps,blen - array of the burst lengths supported by the AXI-bus. Values are limited by the AXI3/4 bus standard, available AXI/System bus CSR flags and the AXI-bus IP-core synthesize config . All DW *MACs support setting the burst length within the set: 4, 8, 16, 32, 64, 128, 256. If some burst length is unsupported a zero value can be specified instead in the array. Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> --- Documentation/devicetree/bindings/net/snps,dwmac.yaml | 8 ++++++++ 1 file changed, 8 insertions(+)