diff options
| author | Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com> | 2018-02-07 02:51:50 -0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-02-27 22:26:15 -0500 |
| commit | b4472d7180894c96b6133ef5ff3df50836591eaa (patch) | |
| tree | 29e73ca0d1f8147ee3bff2720ebc290229442123 /drivers/scsi/mpt3sas/mpt3sas_base.c | |
| parent | e5747439366c1079257083f231f5dd9a84bf0fd7 (diff) | |
scsi: mpt3sas: Introduce function to clone mpi reply.
If the posted request has an error of any type, the IOC writes
a Reply message into a host-based system reply message frame.
This functions clone it in the BAR0 mapped region.
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/mpt3sas/mpt3sas_base.c')
| -rw-r--r-- | drivers/scsi/mpt3sas/mpt3sas_base.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c index bb2f2a4156a9..7858c2d4a14a 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_base.c +++ b/drivers/scsi/mpt3sas/mpt3sas_base.c @@ -126,6 +126,33 @@ module_param_call(mpt3sas_fwfault_debug, _scsih_set_fwfault_debug, param_get_int, &mpt3sas_fwfault_debug, 0644); /** + * _base_clone_reply_to_sys_mem - copies reply to reply free iomem + * in BAR0 space. + * + * @ioc: per adapter object + * @reply: reply message frame(lower 32bit addr) + * @index: System request message index. + * + * @Returns - Nothing + */ +static void +_base_clone_reply_to_sys_mem(struct MPT3SAS_ADAPTER *ioc, u32 reply, + u32 index) +{ + /* + * 256 is offset within sys register. + * 256 offset MPI frame starts. Max MPI frame supported is 32. + * 32 * 128 = 4K. From here, Clone of reply free for mcpu starts + */ + u16 cmd_credit = ioc->facts.RequestCredit + 1; + void __iomem *reply_free_iomem = (void __iomem *)ioc->chip + + MPI_FRAME_START_OFFSET + + (cmd_credit * ioc->request_sz) + (index * sizeof(u32)); + + writel(reply, reply_free_iomem); +} + +/** * _base_clone_mpi_to_sys_mem - Writes/copies MPI frames * to system/BAR0 region. * @@ -1400,6 +1427,10 @@ _base_interrupt(int irq, void *bus_id) 0 : ioc->reply_free_host_index + 1; ioc->reply_free[ioc->reply_free_host_index] = cpu_to_le32(reply); + if (ioc->is_mcpu_endpoint) + _base_clone_reply_to_sys_mem(ioc, + cpu_to_le32(reply), + ioc->reply_free_host_index); writel(ioc->reply_free_host_index, &ioc->chip->ReplyFreeHostIndex); } @@ -6242,8 +6273,12 @@ _base_make_ioc_operational(struct MPT3SAS_ADAPTER *ioc) /* initialize Reply Free Queue */ for (i = 0, reply_address = (u32)ioc->reply_dma ; i < ioc->reply_free_queue_depth ; i++, reply_address += - ioc->reply_sz) + ioc->reply_sz) { ioc->reply_free[i] = cpu_to_le32(reply_address); + if (ioc->is_mcpu_endpoint) + _base_clone_reply_to_sys_mem(ioc, + (__le32)reply_address, i); + } /* initialize reply queues */ if (ioc->is_driver_loading) |