Can a L2 2960X mark DSCP based on the source IP addr?

Hello

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I've read the article about QoS on this platform, but somehow i'm still confused about the possibility.

I know i can mark the DSCP field based on the ingress interface (on a per port basis), but can you match the source address if the switch is not L3?

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Basicaly, what i want is to create a policy map that match a subnet and set DSCP to AF41. Is it possible?

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On a more general standpoint, is it worth it to mark DSCP on a layer2 switch? I heard that QoS was almost only needed at L3.

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Thanks!!