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net: ipa: use WARN_ON() rather than assertions 

I've added commented assertions to record certain properties that
can be assumed to hold in certain places in the IPA code.  Convert
these into real WARN_ON() calls so the assertions are actually
checked, using the standard WARN_ON() mechanism.

Where errors can be returned, return an error if a warning is
triggered.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alex Elder 2021-07-26 12:40:10 -05:00 committed by David S. Miller
parent 442d68ebf0
commit 5bc5588466
7 changed files with 53 additions and 44 deletions
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30
drivers/net/ipa/gsi_trans.c
View File

@ -184,8 +184,8 @@ static u32 gsi_trans_pool_alloc_common(struct gsi_trans_pool *pool, u32 count)
{
u32 offset;
/* assert(count > 0); */
/* assert(count <= pool->max_alloc); */
WARN_ON(!count);
WARN_ON(count > pool->max_alloc);
/* Allocate from beginning if wrap would occur */
if (count > pool->count - pool->free)
@ -221,9 +221,10 @@ void *gsi_trans_pool_next(struct gsi_trans_pool *pool, void *element)
{
void *end = pool->base + pool->count * pool->size;
/* assert(element >= pool->base); */
/* assert(element < end); */
/* assert(pool->max_alloc == 1); */
WARN_ON(element < pool->base);
WARN_ON(element >= end);
WARN_ON(pool->max_alloc != 1);
element += pool->size;
return element < end ? element : pool->base;
@ -328,7 +329,8 @@ struct gsi_trans *gsi_channel_trans_alloc(struct gsi *gsi, u32 channel_id,
struct gsi_trans_info *trans_info;
struct gsi_trans *trans;
/* assert(tre_count <= gsi_channel_trans_tre_max(gsi, channel_id)); */
if (WARN_ON(tre_count > gsi_channel_trans_tre_max(gsi, channel_id)))
return NULL;
trans_info = &channel->trans_info;
@ -404,7 +406,7 @@ void gsi_trans_cmd_add(struct gsi_trans *trans, void *buf, u32 size,
u32 which = trans->used++;
struct scatterlist *sg;
/* assert(which < trans->tre_count); */
WARN_ON(which >= trans->tre_count);
/* Commands are quite different from data transfer requests.
* Their payloads come from a pool whose memory is allocated
@ -437,8 +439,10 @@ int gsi_trans_page_add(struct gsi_trans *trans, struct page *page, u32 size,
struct scatterlist *sg = &trans->sgl[0];
int ret;
/* assert(trans->tre_count == 1); */
/* assert(!trans->used); */
if (WARN_ON(trans->tre_count != 1))
return -EINVAL;
if (WARN_ON(trans->used))
return -EINVAL;
sg_set_page(sg, page, size, offset);
ret = dma_map_sg(trans->gsi->dev, sg, 1, trans->direction);
@ -457,8 +461,10 @@ int gsi_trans_skb_add(struct gsi_trans *trans, struct sk_buff *skb)
u32 used;
int ret;
/* assert(trans->tre_count == 1); */
/* assert(!trans->used); */
if (WARN_ON(trans->tre_count != 1))
return -EINVAL;
if (WARN_ON(trans->used))
return -EINVAL;
/* skb->len will not be 0 (checked early) */
ret = skb_to_sgvec(skb, sg, 0, skb->len);
@ -546,7 +552,7 @@ static void __gsi_trans_commit(struct gsi_trans *trans, bool ring_db)
u32 avail;
u32 i;
/* assert(trans->used > 0); */
WARN_ON(!trans->used);
/* Consume the entries. If we cross the end of the ring while
* filling them we'll switch to the beginning to finish.

14
drivers/net/ipa/ipa_cmd.c
View File

@ -165,6 +165,10 @@ static void ipa_cmd_validate_build(void)
field_max(IP_FLTRT_FLAGS_NHASH_SIZE_FMASK));
BUILD_BUG_ON(field_max(IP_FLTRT_FLAGS_HASH_ADDR_FMASK) !=
field_max(IP_FLTRT_FLAGS_NHASH_ADDR_FMASK));
/* Valid endpoint numbers must fit in the IP packet init command */
BUILD_BUG_ON(field_max(IPA_PACKET_INIT_DEST_ENDPOINT_FMASK) <
IPA_ENDPOINT_MAX - 1);
}
/* Validate a memory region holding a table */
@ -531,9 +535,6 @@ static void ipa_cmd_ip_packet_init_add(struct gsi_trans *trans, u8 endpoint_id)
union ipa_cmd_payload *cmd_payload;
dma_addr_t payload_addr;
/* assert(endpoint_id <
field_max(IPA_PACKET_INIT_DEST_ENDPOINT_FMASK)); */
cmd_payload = ipa_cmd_payload_alloc(ipa, &payload_addr);
payload = &cmd_payload->ip_packet_init;
@ -557,8 +558,9 @@ void ipa_cmd_dma_shared_mem_add(struct gsi_trans *trans, u32 offset, u16 size,
u16 flags;
/* size and offset must fit in 16 bit fields */
/* assert(size > 0 && size <= U16_MAX); */
/* assert(offset <= U16_MAX && ipa->mem_offset <= U16_MAX - offset); */
WARN_ON(!size);
WARN_ON(size > U16_MAX);
WARN_ON(offset > U16_MAX || ipa->mem_offset > U16_MAX - offset);
offset += ipa->mem_offset;
@ -597,8 +599,6 @@ static void ipa_cmd_ip_tag_status_add(struct gsi_trans *trans)
union ipa_cmd_payload *cmd_payload;
dma_addr_t payload_addr;
/* assert(tag <= field_max(IP_PACKET_TAG_STATUS_TAG_FMASK)); */
cmd_payload = ipa_cmd_payload_alloc(ipa, &payload_addr);
payload = &cmd_payload->ip_packet_tag_status;

26
drivers/net/ipa/ipa_endpoint.c
View File

@ -250,17 +250,18 @@ ipa_endpoint_init_ctrl(struct ipa_endpoint *endpoint, bool suspend_delay)
/* Suspend is not supported for IPA v4.0+. Delay doesn't work
* correctly on IPA v4.2.
*
* if (endpoint->toward_ipa)
* assert(ipa->version != IPA_VERSION_4.2);
* else
* assert(ipa->version < IPA_VERSION_4_0);
*/
if (endpoint->toward_ipa)
WARN_ON(ipa->version == IPA_VERSION_4_2);
else
WARN_ON(ipa->version >= IPA_VERSION_4_0);
mask = endpoint->toward_ipa ? ENDP_DELAY_FMASK : ENDP_SUSPEND_FMASK;
val = ioread32(ipa->reg_virt + offset);
/* Don't bother if it's already in the requested state */
state = !!(val & mask);
/* Don't bother if it's already in the requested state */
if (suspend_delay != state) {
val ^= mask;
iowrite32(val, ipa->reg_virt + offset);
@ -273,7 +274,7 @@ ipa_endpoint_init_ctrl(struct ipa_endpoint *endpoint, bool suspend_delay)
static void
ipa_endpoint_program_delay(struct ipa_endpoint *endpoint, bool enable)
{
/* assert(endpoint->toward_ipa); */
WARN_ON(!endpoint->toward_ipa);
/* Delay mode doesn't work properly for IPA v4.2 */
if (endpoint->ipa->version != IPA_VERSION_4_2)
@ -287,7 +288,8 @@ static bool ipa_endpoint_aggr_active(struct ipa_endpoint *endpoint)
u32 offset;
u32 val;
/* assert(mask & ipa->available); */
WARN_ON(!(mask & ipa->available));
offset = ipa_reg_state_aggr_active_offset(ipa->version);
val = ioread32(ipa->reg_virt + offset);
@ -299,7 +301,8 @@ static void ipa_endpoint_force_close(struct ipa_endpoint *endpoint)
u32 mask = BIT(endpoint->endpoint_id);
struct ipa *ipa = endpoint->ipa;
/* assert(mask & ipa->available); */
WARN_ON(!(mask & ipa->available));
iowrite32(mask, ipa->reg_virt + IPA_REG_AGGR_FORCE_CLOSE_OFFSET);
}
@ -338,7 +341,7 @@ ipa_endpoint_program_suspend(struct ipa_endpoint *endpoint, bool enable)
if (endpoint->ipa->version >= IPA_VERSION_4_0)
return enable; /* For IPA v4.0+, no change made */
/* assert(!endpoint->toward_ipa); */
WARN_ON(endpoint->toward_ipa);
suspended = ipa_endpoint_init_ctrl(endpoint, enable);
@ -1156,7 +1159,8 @@ static bool ipa_endpoint_skb_build(struct ipa_endpoint *endpoint,
if (!endpoint->netdev)
return false;
/* assert(len <= SKB_WITH_OVERHEAD(IPA_RX_BUFFER_SIZE-NET_SKB_PAD)); */
WARN_ON(len > SKB_WITH_OVERHEAD(IPA_RX_BUFFER_SIZE - NET_SKB_PAD));
skb = build_skb(page_address(page), IPA_RX_BUFFER_SIZE);
if (skb) {
/* Reserve the headroom and account for the data */

8
drivers/net/ipa/ipa_interrupt.c
View File

@ -146,7 +146,7 @@ static void ipa_interrupt_suspend_control(struct ipa_interrupt *interrupt,
u32 offset;
u32 val;
/* assert(mask & ipa->available); */
WARN_ON(!(mask & ipa->available));
/* IPA version 3.0 does not support TX_SUSPEND interrupt control */
if (ipa->version == IPA_VERSION_3_0)
@ -206,7 +206,8 @@ void ipa_interrupt_add(struct ipa_interrupt *interrupt,
struct ipa *ipa = interrupt->ipa;
u32 offset;
/* assert(ipa_irq < IPA_IRQ_COUNT); */
WARN_ON(ipa_irq >= IPA_IRQ_COUNT);
interrupt->handler[ipa_irq] = handler;
/* Update the IPA interrupt mask to enable it */
@ -222,7 +223,8 @@ ipa_interrupt_remove(struct ipa_interrupt *interrupt, enum ipa_irq_id ipa_irq)
struct ipa *ipa = interrupt->ipa;
u32 offset;
/* assert(ipa_irq < IPA_IRQ_COUNT); */
WARN_ON(ipa_irq >= IPA_IRQ_COUNT);
/* Update the IPA interrupt mask to disable it */
interrupt->enabled &= ~BIT(ipa_irq);
offset = ipa_reg_irq_en_offset(ipa->version);

5
drivers/net/ipa/ipa_main.c
View File

@ -253,9 +253,6 @@ ipa_hardware_config_qsb(struct ipa *ipa, const struct ipa_data *data)
const struct ipa_qsb_data *data1;
u32 val;
/* assert(data->qsb_count > 0); */
/* assert(data->qsb_count < 3); */
/* QMB 0 represents DDR; QMB 1 (if present) represents PCIe */
data0 = &data->qsb_data[IPA_QSB_MASTER_DDR];
if (data->qsb_count > 1)
@ -293,7 +290,7 @@ ipa_hardware_config_qsb(struct ipa *ipa, const struct ipa_data *data)
*/
static u32 ipa_aggr_granularity_val(u32 usec)
{
/* assert(usec != 0); */
WARN_ON(!usec);
return DIV_ROUND_CLOSEST(usec * TIMER_FREQUENCY, USEC_PER_SEC) - 1;
}

12
drivers/net/ipa/ipa_reg.h
View File

@ -99,7 +99,7 @@ struct ipa;
static inline u32 arbitration_lock_disable_encoded(enum ipa_version version,
u32 mask)
{
/* assert(version >= IPA_VERSION_4_0); */
WARN_ON(version < IPA_VERSION_4_0);
if (version < IPA_VERSION_4_9)
return u32_encode_bits(mask, GENMASK(20, 17));
@ -116,7 +116,7 @@ static inline u32 full_flush_rsc_closure_en_encoded(enum ipa_version version,
{
u32 val = enable ? 1 : 0;
/* assert(version >= IPA_VERSION_4_5); */
WARN_ON(version < IPA_VERSION_4_5);
if (version == IPA_VERSION_4_5 || version == IPA_VERSION_4_7)
return u32_encode_bits(val, GENMASK(21, 21));
@ -409,7 +409,7 @@ static inline u32 ipa_header_size_encoded(enum ipa_version version,
val = u32_encode_bits(size, HDR_LEN_FMASK);
if (version < IPA_VERSION_4_5) {
/* ipa_assert(header_size == size); */
WARN_ON(header_size != size);
return val;
}
@ -429,7 +429,7 @@ static inline u32 ipa_metadata_offset_encoded(enum ipa_version version,
val = u32_encode_bits(off, HDR_OFST_METADATA_FMASK);
if (version < IPA_VERSION_4_5) {
/* ipa_assert(offset == off); */
WARN_ON(offset != off);
return val;
}
@ -812,7 +812,7 @@ ipa_reg_irq_suspend_info_offset(enum ipa_version version)
static inline u32
ipa_reg_irq_suspend_en_ee_n_offset(enum ipa_version version, u32 ee)
{
/* assert(version != IPA_VERSION_3_0); */
WARN_ON(version == IPA_VERSION_3_0);
if (version < IPA_VERSION_4_9)
return 0x00003034 + 0x1000 * ee;
@ -830,7 +830,7 @@ ipa_reg_irq_suspend_en_offset(enum ipa_version version)
static inline u32
ipa_reg_irq_suspend_clr_ee_n_offset(enum ipa_version version, u32 ee)
{
/* assert(version != IPA_VERSION_3_0); */
WARN_ON(version == IPA_VERSION_3_0);
if (version < IPA_VERSION_4_9)
return 0x00003038 + 0x1000 * ee;

2
drivers/net/ipa/ipa_table.c
View File

@ -231,7 +231,7 @@ static dma_addr_t ipa_table_addr(struct ipa *ipa, bool filter_mask, u16 count)
if (!count)
return 0;
/* assert(count <= max_t(u32, IPA_FILTER_COUNT_MAX, IPA_ROUTE_COUNT_MAX)); */
WARN_ON(count > max_t(u32, IPA_FILTER_COUNT_MAX, IPA_ROUTE_COUNT_MAX));
/* Skip over the zero rule and possibly the filter mask */
skip = filter_mask ? 1 : 2;