redonkable/alistair23-linux
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qed: sanitize PBL chains allocation

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PBL chain elements are actually DMA addresses stored in __le64, but
currently their size is hardcoded to 8, and DMA addresses are assigned
via cast to variable-sized dma_addr_t without any bitwise conversions.
Change the type of pbl_virt array to match the actual one, add a new
field to store the size of allocated DMA memory and sanitize elements
assignment.

Misc: give more logic names to the members of qed_chain::pbl_sp embedded
struct.

Signed-off-by: Alexander Lobakin <alobakin@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: Michal Kalderon <michal.kalderon@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Lobakin 2020-07-23 01:10:35 +03:00 committed by David S. Miller
parent 96ca4c50c7
commit 9b6ee3cf95
3 changed files with 20 additions and 21 deletions
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21
drivers/net/ethernet/qlogic/qed/qed_chain.c
View file

@ -49,7 +49,7 @@ static void qed_chain_free_pbl(struct qed_dev *cdev, struct qed_chain *chain)
{
struct device *dev = &cdev->pdev->dev;
struct addr_tbl_entry *entry;
u32 pbl_size, i;
u32 i;
if (!chain->pbl.pp_addr_tbl)
return;
@ -63,11 +63,10 @@ static void qed_chain_free_pbl(struct qed_dev *cdev, struct qed_chain *chain)
entry->dma_map);
}
pbl_size = chain->page_cnt * QED_CHAIN_PBL_ENTRY_SIZE;
if (!chain->b_external_pbl)
dma_free_coherent(dev, pbl_size, chain->pbl_sp.p_virt_table,
chain->pbl_sp.p_phys_table);
dma_free_coherent(dev, chain->pbl_sp.table_size,
chain->pbl_sp.table_virt,
chain->pbl_sp.table_phys);
vfree(chain->pbl.pp_addr_tbl);
chain->pbl.pp_addr_tbl = NULL;
@ -190,7 +189,7 @@ static int qed_chain_alloc_pbl(struct qed_dev *cdev, struct qed_chain *chain,
struct device *dev = &cdev->pdev->dev;
struct addr_tbl_entry *addr_tbl;
dma_addr_t phys, pbl_phys;
void *pbl_virt;
__le64 *pbl_virt;
u32 page_cnt, i;
size_t size;
void *virt;
@ -214,7 +213,7 @@ static int qed_chain_alloc_pbl(struct qed_dev *cdev, struct qed_chain *chain,
chain->b_external_pbl = true;
} else {
size = array_size(page_cnt, QED_CHAIN_PBL_ENTRY_SIZE);
size = array_size(page_cnt, sizeof(*pbl_virt));
if (unlikely(size == SIZE_MAX))
return -EOVERFLOW;
@ -225,8 +224,9 @@ static int qed_chain_alloc_pbl(struct qed_dev *cdev, struct qed_chain *chain,
if (!pbl_virt)
return -ENOMEM;
chain->pbl_sp.p_virt_table = pbl_virt;
chain->pbl_sp.p_phys_table = pbl_phys;
chain->pbl_sp.table_virt = pbl_virt;
chain->pbl_sp.table_phys = pbl_phys;
chain->pbl_sp.table_size = size;
for (i = 0; i < page_cnt; i++) {
virt = dma_alloc_coherent(dev, QED_CHAIN_PAGE_SIZE, &phys,
@ -240,8 +240,7 @@ static int qed_chain_alloc_pbl(struct qed_dev *cdev, struct qed_chain *chain,
}
/* Fill the PBL table with the physical address of the page */
*(dma_addr_t *)pbl_virt = phys;
pbl_virt += QED_CHAIN_PBL_ENTRY_SIZE;
pbl_virt[i] = cpu_to_le64(phys);
/* Keep the virtual address of the page */
addr_tbl[i].virt_addr = virt;

4
drivers/net/ethernet/qlogic/qed/qed_sp_commands.c
View file

@ -366,11 +366,11 @@ int qed_sp_pf_start(struct qed_hwfn *p_hwfn,
/* Place EQ address in RAMROD */
DMA_REGPAIR_LE(p_ramrod->event_ring_pbl_addr,
p_hwfn->p_eq->chain.pbl_sp.p_phys_table);
qed_chain_get_pbl_phys(&p_hwfn->p_eq->chain));
page_cnt = (u8)qed_chain_get_page_cnt(&p_hwfn->p_eq->chain);
p_ramrod->event_ring_num_pages = page_cnt;
DMA_REGPAIR_LE(p_ramrod->consolid_q_pbl_addr,
p_hwfn->p_consq->chain.pbl_sp.p_phys_table);
qed_chain_get_pbl_phys(&p_hwfn->p_consq->chain));
qed_tunn_set_pf_start_params(p_hwfn, p_tunn, &p_ramrod->tunnel_config);

16
include/linux/qed/qed_chain.h
View file

@ -127,8 +127,9 @@ struct qed_chain {
/* Base address of a pre-allocated buffer for pbl */
struct {
dma_addr_t p_phys_table;
void *p_virt_table;
__le64 *table_virt;
dma_addr_t table_phys;
size_t table_size;
} pbl_sp;
/* Address of first page of the chain - the address is required
@ -146,7 +147,6 @@ struct qed_chain {
bool b_external_pbl;
};
#define QED_CHAIN_PBL_ENTRY_SIZE 8
#define QED_CHAIN_PAGE_SIZE 0x1000
#define ELEMS_PER_PAGE(elem_size) \
@ -236,7 +236,7 @@ static inline u32 qed_chain_get_page_cnt(struct qed_chain *p_chain)
static inline dma_addr_t qed_chain_get_pbl_phys(struct qed_chain *p_chain)
{
return p_chain->pbl_sp.p_phys_table;
return p_chain->pbl_sp.table_phys;
}
/**
@ -527,8 +527,8 @@ static inline void qed_chain_init_params(struct qed_chain *p_chain,
p_chain->capacity = p_chain->usable_per_page * page_cnt;
p_chain->size = p_chain->elem_per_page * page_cnt;
p_chain->pbl_sp.p_phys_table = 0;
p_chain->pbl_sp.p_virt_table = NULL;
p_chain->pbl_sp.table_phys = 0;
p_chain->pbl_sp.table_virt = NULL;
p_chain->pbl.pp_addr_tbl = NULL;
}
@ -569,8 +569,8 @@ static inline void qed_chain_init_pbl_mem(struct qed_chain *p_chain,
dma_addr_t p_phys_pbl,
struct addr_tbl_entry *pp_addr_tbl)
{
p_chain->pbl_sp.p_phys_table = p_phys_pbl;
p_chain->pbl_sp.p_virt_table = p_virt_pbl;
p_chain->pbl_sp.table_phys = p_phys_pbl;
p_chain->pbl_sp.table_virt = p_virt_pbl;
p_chain->pbl.pp_addr_tbl = pp_addr_tbl;
}