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| author | Serge Semin <fancer.lancer@gmail.com> | 2016-12-14 02:49:14 +0300 |
|---|---|---|
| committer | Jon Mason <jdmason@kudzu.us> | 2017-07-06 18:30:07 +0300 |
| commit | 1e5301196a88961b02fe43c73a952f78b2c84712 (patch) | |
| tree | e7ea5ccf325709d0af0faf6d4f177d44a89f3371 /drivers/ntb/test/ntb_perf.c | |
| parent | 60934b200ddd62187b149a7f32cc0f160c08a7ed (diff) | |
| download | linux-1e5301196a88961b02fe43c73a952f78b2c84712.tar.xz | |
NTB: Add indexed ports NTB API
There is some NTB hardware, which can combine more than just two domains
over NTB. For instance, some IDT PCIe-switches can have NTB-functions
activated on more than two-ports. The different domains are distinguished
by ports they are connected to. So the new port-related methods are added to
the NTB API:
ntb_port_number() - return local port
ntb_peer_port_count() - return number of peers local port can connect to
ntb_peer_port_number(pdix) - return port number by it index
ntb_peer_port_idx(port) - return port index by it number
Current test-drivers aren't changed much. They still support two-ports devices
for the time being while multi-ports hardware drivers aren't added.
By default port-related API is declared for two-ports hardware.
So corresponding hardware drivers won't need to implement it.
Signed-off-by: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'drivers/ntb/test/ntb_perf.c')
| -rw-r--r-- | drivers/ntb/test/ntb_perf.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/ntb/test/ntb_perf.c b/drivers/ntb/test/ntb_perf.c index 5cab2831ce99..e52cc4eace90 100644 --- a/drivers/ntb/test/ntb_perf.c +++ b/drivers/ntb/test/ntb_perf.c @@ -76,6 +76,7 @@ #define DMA_RETRIES 20 #define SZ_4G (1ULL << 32) #define MAX_SEG_ORDER 20 /* no larger than 1M for kmalloc buffer */ +#define PIDX NTB_DEF_PEER_IDX MODULE_LICENSE(DRIVER_LICENSE); MODULE_VERSION(DRIVER_VERSION); @@ -766,6 +767,9 @@ static int perf_probe(struct ntb_client *client, struct ntb_dev *ntb) return -EIO; } + if (ntb_peer_port_count(ntb) != NTB_DEF_PEER_CNT) + dev_warn(&ntb->dev, "Multi-port NTB devices unsupported\n"); + node = dev_to_node(&pdev->dev); perf = kzalloc_node(sizeof(*perf), GFP_KERNEL, node); |