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IB/ehca: Assure 4K alignment for firmware control blocks

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Assure 4K alignment for firmware control blocks in 64K page mode,
because kzalloc()'s result address might not be 4K aligned if 64K
pages are enabled. Thus, we introduce wrappers called
ehca_{alloc,free}_fw_ctrlblock(), which use a slab cache for objects
with 4K length and 4K alignment in order to alloc/free firmware
control blocks in 64K page mode. In 4K page mode those wrappers just
are defines of get_zeroed_page() and free_page().

Signed-off-by: Hoang-Nam Nguyen <hnguyen@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Hoang-Nam Nguyen
2006-11-07 00:56:39 +01:00
committed by Roland Dreier
parent 40eb006685
commit 7e28db5d8f
6 changed files with 81 additions and 35 deletions
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17
drivers/infiniband/hw/ehca/ehca_irq.c
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@ -45,6 +45,7 @@
#include "ehca_tools.h"
#include "hcp_if.h"
#include "hipz_fns.h"
#include "ipz_pt_fn.h"
#define EQE_COMPLETION_EVENT EHCA_BMASK_IBM(1,1)
#define EQE_CQ_QP_NUMBER EHCA_BMASK_IBM(8,31)
@ -137,38 +138,36 @@ int ehca_error_data(struct ehca_shca *shca, void *data,
u64 *rblock;
unsigned long block_count;
rblock = kzalloc(H_CB_ALIGNMENT, GFP_KERNEL);
rblock = ehca_alloc_fw_ctrlblock();
if (!rblock) {
ehca_err(&shca->ib_device, "Cannot allocate rblock memory.");
ret = -ENOMEM;
goto error_data1;
}
/* rblock must be 4K aligned and should be 4K large */
ret = hipz_h_error_data(shca->ipz_hca_handle,
resource,
rblock,
&block_count);
if (ret == H_R_STATE) {
if (ret == H_R_STATE)
ehca_err(&shca->ib_device,
"No error data is available: %lx.", resource);
}
else if (ret == H_SUCCESS) {
int length;
length = EHCA_BMASK_GET(ERROR_DATA_LENGTH, rblock[0]);
if (length > PAGE_SIZE)
length = PAGE_SIZE;
if (length > EHCA_PAGESIZE)
length = EHCA_PAGESIZE;
print_error_data(shca, data, rblock, length);
}
else {
} else
ehca_err(&shca->ib_device,
"Error data could not be fetched: %lx", resource);
}
kfree(rblock);
ehca_free_fw_ctrlblock(rblock);
error_data1:
return ret;