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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>
This commit is contained in:
Suganath Prabu Subramani 2018-02-07 02:51:50 -08:00 committed by Martin K. Petersen
parent e574743936
commit b4472d7180
1 changed files with 36 additions and 1 deletions
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37
drivers/scsi/mpt3sas/mpt3sas_base.c
View File

@ -125,6 +125,33 @@ _scsih_set_fwfault_debug(const char *val, const struct kernel_param *kp)
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)