Messages in this thread | | | Date | Mon, 5 Mar 2018 13:41:48 +0100 | From | Thomas Petazzoni <> | Subject | Re: [PATCH net-next 1/5] net: mvpp2: use the same buffer pool for all ports |
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Hello,
On Mon, 5 Mar 2018 11:48:13 +0100, Antoine Tenart wrote:
> > > +static void mvpp2_setup_bm_pool(void) > > > +{ > > > + /* Short pool */ > > > + mvpp2_pools[MVPP2_BM_SHORT].buf_num = MVPP2_BM_SHORT_BUF_NUM; > > > + mvpp2_pools[MVPP2_BM_SHORT].pkt_size = MVPP2_BM_SHORT_PKT_SIZE; > > > + > > > + /* Long pool */ > > > + mvpp2_pools[MVPP2_BM_LONG].buf_num = MVPP2_BM_LONG_BUF_NUM; > > > + mvpp2_pools[MVPP2_BM_LONG].pkt_size = MVPP2_BM_LONG_PKT_SIZE; > > > +} > > > > ? > > I wanted to do this, but it's no possible as MVPP2_BM_SHORT_PKT_SIZE and > MVPP2_BM_LONG_PKT_SIZE use a core definition which expands at some point > to __max(...) which has to be called from within a function.
Hum, weird:
#define MVPP2_BM_LONG_PKT_SIZE MVPP2_RX_MAX_PKT_SIZE(MVPP2_BM_LONG_FRAME_SIZE) #define MVPP2_BM_LONG_FRAME_SIZE 2048
#define MVPP2_RX_MAX_PKT_SIZE(total_size) \ ((total_size) - NET_SKB_PAD - MVPP2_SKB_SHINFO_SIZE)
#define MVPP2_SKB_SHINFO_SIZE \ SKB_DATA_ALIGN(sizeof(struct skb_shared_info))
#define SKB_DATA_ALIGN(X) ALIGN(X, SMP_CACHE_BYTES)
I don't really see a __max(...) call.
And if this value really expands depending on other values, then it isn't really a constant, and should be considered as a constant, no?
Thomas -- Thomas Petazzoni, CTO, Bootlin (formerly Free Electrons) Embedded Linux and Kernel engineering http://bootlin.com
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