diff options
| author | Bryan O'Sullivan <bos@pathscale.com> | 2006-09-28 08:59:59 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2006-09-28 11:16:25 -0700 |
| commit | 9929b0fb0f35f54371e9364bab809bcd753f9d3a (patch) | |
| tree | 1722f36becc47589bb7b0d98ad00c10dece2a95e /drivers/infiniband/hw/ipath/ipath_kernel.h | |
| parent | 221e31985b490309eb9ae33ac815deae3b5aa021 (diff) | |
IB/ipath: Driver support for userspace sharing of HW contexts
This allows multiple userspace processes to share a single hardware
context in a master/slave arrangement. It is backwards binary compatible
with existing userspace.
Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_kernel.h')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_kernel.h | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_kernel.h b/drivers/infiniband/hw/ipath/ipath_kernel.h index a8a56276ff1d..0cabd4f16234 100644 --- a/drivers/infiniband/hw/ipath/ipath_kernel.h +++ b/drivers/infiniband/hw/ipath/ipath_kernel.h @@ -79,8 +79,8 @@ struct ipath_portdata { dma_addr_t port_rcvhdrq_phys; dma_addr_t port_rcvhdrqtailaddr_phys; /* - * number of opens on this instance (0 or 1; ignoring forks, dup, - * etc. for now) + * number of opens (including slave subports) on this instance + * (ignoring forks, dup, etc. for now) */ int port_cnt; /* @@ -89,6 +89,10 @@ struct ipath_portdata { */ /* instead of calculating it */ unsigned port_port; + /* non-zero if port is being shared. */ + u16 port_subport_cnt; + /* non-zero if port is being shared. */ + u16 port_subport_id; /* chip offset of PIO buffers for this port */ u32 port_piobufs; /* how many alloc_pages() chunks in port_rcvegrbuf_pages */ @@ -121,6 +125,16 @@ struct ipath_portdata { u16 port_pkeys[4]; /* so file ops can get at unit */ struct ipath_devdata *port_dd; + /* A page of memory for rcvhdrhead, rcvegrhead, rcvegrtail * N */ + void *subport_uregbase; + /* An array of pages for the eager receive buffers * N */ + void *subport_rcvegrbuf; + /* An array of pages for the eager header queue entries * N */ + void *subport_rcvhdr_base; + /* The version of the library which opened this port */ + u32 userversion; + /* Bitmask of active slaves */ + u32 active_slaves; }; struct sk_buff; @@ -512,6 +526,12 @@ struct ipath_devdata { u32 ipath_lli_errors; }; +/* Private data for file operations */ +struct ipath_filedata { + struct ipath_portdata *pd; + unsigned subport; + unsigned tidcursor; +}; extern struct list_head ipath_dev_list; extern spinlock_t ipath_devs_lock; extern struct ipath_devdata *ipath_lookup(int unit); @@ -572,7 +592,11 @@ int ipath_set_lid(struct ipath_devdata *, u32, u8); int ipath_set_rx_pol_inv(struct ipath_devdata *dd, u8 new_pol_inv); /* for use in system calls, where we want to know device type, etc. */ -#define port_fp(fp) ((struct ipath_portdata *) (fp)->private_data) +#define port_fp(fp) ((struct ipath_filedata *)(fp)->private_data)->pd +#define subport_fp(fp) \ + ((struct ipath_filedata *)(fp)->private_data)->subport +#define tidcursor_fp(fp) \ + ((struct ipath_filedata *)(fp)->private_data)->tidcursor /* * values for ipath_flags |