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| author | Divy Le Ray <divy@chelsio.com> | 2009-01-18 21:29:40 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-01-21 14:34:03 -0800 |
| commit | 5cda9364f1fbc330f0d82f534505a8e375d0a66c (patch) | |
| tree | e4c33d95c12b69ac562ebcd1ce1d4ab8e27328be | |
| parent | c405b828161286729b6a5a729159114dca122923 (diff) | |
| download | linux-5cda9364f1fbc330f0d82f534505a8e375d0a66c.tar.gz linux-5cda9364f1fbc330f0d82f534505a8e375d0a66c.tar.bz2 linux-5cda9364f1fbc330f0d82f534505a8e375d0a66c.zip | |
cxgb3: ease msi-x settings conditions
The driver currently drops to line interrupt mode
if it did not get all the msi-x vectors it requested.
Allow msi-x settings when a minimal amount of vectors
is provided.
Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/cxgb3/adapter.h | 1 | ||||
| -rw-r--r-- | drivers/net/cxgb3/cxgb3_main.c | 23 |
2 files changed, 16 insertions, 8 deletions
diff --git a/drivers/net/cxgb3/adapter.h b/drivers/net/cxgb3/adapter.h index a89d8cc51205..5fb7c6851eb2 100644 --- a/drivers/net/cxgb3/adapter.h +++ b/drivers/net/cxgb3/adapter.h @@ -230,6 +230,7 @@ struct adapter { unsigned int slow_intr_mask; unsigned long irq_stats[IRQ_NUM_STATS]; + int msix_nvectors; struct { unsigned short vec; char desc[22]; diff --git a/drivers/net/cxgb3/cxgb3_main.c b/drivers/net/cxgb3/cxgb3_main.c index 0089746b8d02..52131bd4cc70 100644 --- a/drivers/net/cxgb3/cxgb3_main.c +++ b/drivers/net/cxgb3/cxgb3_main.c @@ -338,7 +338,7 @@ static void free_irq_resources(struct adapter *adapter) free_irq(adapter->msix_info[0].vec, adapter); for_each_port(adapter, i) - n += adap2pinfo(adapter, i)->nqsets; + n += adap2pinfo(adapter, i)->nqsets; for (i = 0; i < n; ++i) free_irq(adapter->msix_info[i + 1].vec, @@ -2752,7 +2752,7 @@ static void set_nqsets(struct adapter *adap) int i, j = 0; int num_cpus = num_online_cpus(); int hwports = adap->params.nports; - int nqsets = SGE_QSETS; + int nqsets = adap->msix_nvectors - 1; if (adap->params.rev > 0 && adap->flags & USING_MSIX) { if (hwports == 2 && @@ -2781,18 +2781,25 @@ static void set_nqsets(struct adapter *adap) static int __devinit cxgb_enable_msix(struct adapter *adap) { struct msix_entry entries[SGE_QSETS + 1]; + int vectors; int i, err; - for (i = 0; i < ARRAY_SIZE(entries); ++i) + vectors = ARRAY_SIZE(entries); + for (i = 0; i < vectors; ++i) entries[i].entry = i; - err = pci_enable_msix(adap->pdev, entries, ARRAY_SIZE(entries)); + while ((err = pci_enable_msix(adap->pdev, entries, vectors)) > 0) + vectors = err; + + if (!err && vectors < (adap->params.nports + 1)) + err = -1; + if (!err) { - for (i = 0; i < ARRAY_SIZE(entries); ++i) + for (i = 0; i < vectors; ++i) adap->msix_info[i].vec = entries[i].vector; - } else if (err > 0) - dev_info(&adap->pdev->dev, - "only %d MSI-X vectors left, not using MSI-X\n", err); + adap->msix_nvectors = vectors; + } + return err; } |