Re: [PATCH net v2] octeontx2-af: Initialize bitmap arrays.
From: Brett Creeley
Date: Mon Jan 29 2024 - 12:23:28 EST
On 1/28/2024 9:23 PM, Ratheesh Kannoth wrote:
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kmalloc_array() without __GFP_ZERO flag does not initialize
memory to zero. This causes issues with bitmap.
Use bitmap_zalloc() API to fix this issue.
Fixes: dd7842878633 ("octeontx2-af: Add new devlink param to configure maximum usable NIX block LFs")
Signed-off-by: Ratheesh Kannoth <rkannoth@xxxxxxxxxxx>
ChangeLogs:
v1 -> v2: Used bitmap_zalloc() API.
v0 -> v1: Removed devm_kcalloc()._
---
.../net/ethernet/marvell/octeontx2/af/rvu.h | 10 ++--
.../ethernet/marvell/octeontx2/af/rvu_npc.c | 48 ++++++++-----------
2 files changed, 26 insertions(+), 32 deletions(-)
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
index 43be37dd1f32..679bd6e87066 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
@@ -184,11 +184,11 @@ struct npc_mcam {
unsigned long *bmap_reverse; /* Reverse bitmap, bmap_entries => 0 */
u16 bmap_entries; /* Number of unreserved MCAM entries */
u16 bmap_fcnt; /* MCAM entries free count */
- u16 *entry2pfvf_map;
- u16 *entry2cntr_map;
- u16 *cntr2pfvf_map;
- u16 *cntr_refcnt;
- u16 *entry2target_pffunc;
+ unsigned long *entry2pfvf_map;
+ unsigned long *entry2cntr_map;
+ unsigned long *cntr2pfvf_map;
+ unsigned long *cntr_refcnt;
+ unsigned long *entry2target_pffunc;
I'm not sure you want all of these at bitmaps? It was recommended to use
bitmap_zalloc, but that was specifically for the bitmaps.
u8 keysize; /* MCAM keysize 112/224/448 bits */
u8 banks; /* Number of MCAM banks */
u8 banks_per_entry;/* Number of keywords in key */
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
index 167145bdcb75..367f842e365d 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
@@ -1850,13 +1850,13 @@ void npc_mcam_rsrcs_deinit(struct rvu *rvu)
{
struct npc_mcam *mcam = &rvu->hw->mcam;
- kfree(mcam->bmap);
- kfree(mcam->bmap_reverse);
- kfree(mcam->entry2pfvf_map);
- kfree(mcam->cntr2pfvf_map);
- kfree(mcam->entry2cntr_map);
- kfree(mcam->cntr_refcnt);
- kfree(mcam->entry2target_pffunc);
+ bitmap_free(mcam->bmap);
+ bitmap_free(mcam->bmap_reverse);
+ bitmap_free(mcam->entry2pfvf_map);
+ bitmap_free(mcam->cntr2pfvf_map);
+ bitmap_free(mcam->entry2cntr_map);
+ bitmap_free(mcam->cntr_refcnt);
+ bitmap_free(mcam->entry2target_pffunc);
kfree(mcam->counters.bmap);
}
@@ -1904,21 +1904,18 @@ int npc_mcam_rsrcs_init(struct rvu *rvu, int blkaddr)
mcam->pf_offset = mcam->nixlf_offset + nixlf_count;
/* Allocate bitmaps for managing MCAM entries */
- mcam->bmap = kmalloc_array(BITS_TO_LONGS(mcam->bmap_entries),
- sizeof(long), GFP_KERNEL);
+ mcam->bmap = bitmap_zalloc(mcam->bmap_entries, GFP_KERNEL) > if (!mcam->bmap)
return -ENOMEM;
- mcam->bmap_reverse = kmalloc_array(BITS_TO_LONGS(mcam->bmap_entries),
- sizeof(long), GFP_KERNEL);
+ mcam->bmap_reverse = bitmap_zalloc(mcam->bmap_entries, GFP_KERNEL);
if (!mcam->bmap_reverse)
goto free_bmap;
mcam->bmap_fcnt = mcam->bmap_entries;
/* Alloc memory for saving entry to RVU PFFUNC allocation mapping */
- mcam->entry2pfvf_map = kmalloc_array(mcam->bmap_entries,
- sizeof(u16), GFP_KERNEL);
+ mcam->entry2pfvf_map = bitmap_zalloc(mcam->bmap_entries, GFP_KERNEL);
Are you sure you want to use bitmap_zalloc() here?
if (!mcam->entry2pfvf_map)
goto free_bmap_reverse;
@@ -1941,27 +1938,24 @@ int npc_mcam_rsrcs_init(struct rvu *rvu, int blkaddr)
if (err)
goto free_entry_map;
- mcam->cntr2pfvf_map = kmalloc_array(mcam->counters.max,
- sizeof(u16), GFP_KERNEL);
+ mcam->cntr2pfvf_map = bitmap_zalloc(mcam->counters.max, GFP_KERNEL);
if (!mcam->cntr2pfvf_map)
goto free_cntr_bmap;
/* Alloc memory for MCAM entry to counter mapping and for tracking
* counter's reference count.
*/
- mcam->entry2cntr_map = kmalloc_array(mcam->bmap_entries,
- sizeof(u16), GFP_KERNEL);
+ mcam->entry2cntr_map = bitmap_zalloc(mcam->bmap_entries, GFP_KERNEL);
Are you sure you want to use bitmap_zalloc() here?
if (!mcam->entry2cntr_map)
goto free_cntr_map;
- mcam->cntr_refcnt = kmalloc_array(mcam->counters.max,
- sizeof(u16), GFP_KERNEL);
+ mcam->cntr_refcnt = bitmap_zalloc(mcam->counters.max, GFP_KERNEL);
Are you sure you want to use bitmap_zalloc() here?
if (!mcam->cntr_refcnt)
goto free_entry_cntr_map;
/* Alloc memory for saving target device of mcam rule */
- mcam->entry2target_pffunc = kmalloc_array(mcam->total_entries,
- sizeof(u16), GFP_KERNEL);
+ mcam->entry2target_pffunc = bitmap_zalloc(mcam->total_entries,
+ GFP_KERNEL);
Are you sure you want to use bitmap_zalloc() here?
if (!mcam->entry2target_pffunc)
goto free_cntr_refcnt;
@@ -1978,19 +1972,19 @@ int npc_mcam_rsrcs_init(struct rvu *rvu, int blkaddr)
return 0;
free_cntr_refcnt:
- kfree(mcam->cntr_refcnt);
+ bitmap_free(mcam->cntr_refcnt);
free_entry_cntr_map:
- kfree(mcam->entry2cntr_map);
+ bitmap_free(mcam->entry2cntr_map);
free_cntr_map:
- kfree(mcam->cntr2pfvf_map);
+ bitmap_free(mcam->cntr2pfvf_map);
free_cntr_bmap:
kfree(mcam->counters.bmap);
free_entry_map:
- kfree(mcam->entry2pfvf_map);
+ bitmap_free(mcam->entry2pfvf_map);
free_bmap_reverse:
- kfree(mcam->bmap_reverse);
+ bitmap_free(mcam->bmap_reverse);
free_bmap:
- kfree(mcam->bmap);
+ bitmap_free(mcam->bmap);
return -ENOMEM;
}
--
2.25.1