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net: ena: explicit casting and initialization, and clearer error handling 

Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arthur Kiyanovski 2018-10-11 11:26:22 +03:00 committed by David S. Miller
parent cb36bb36e1
commit bd791175a6
3 changed files with 36 additions and 30 deletions
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39
drivers/net/ethernet/amazon/ena/ena_com.c
View File

@ -235,7 +235,7 @@ static struct ena_comp_ctx *__ena_com_submit_admin_cmd(struct ena_com_admin_queu
tail_masked = admin_queue->sq.tail & queue_size_mask;
/* In case of queue FULL */
cnt = atomic_read(&admin_queue->outstanding_cmds);
cnt = (u16)atomic_read(&admin_queue->outstanding_cmds);
if (cnt >= admin_queue->q_depth) {
pr_debug("admin queue is full.\n");
admin_queue->stats.out_of_space++;
@ -304,7 +304,7 @@ static struct ena_comp_ctx *ena_com_submit_admin_cmd(struct ena_com_admin_queue
struct ena_admin_acq_entry *comp,
size_t comp_size_in_bytes)
{
unsigned long flags;
unsigned long flags = 0;
struct ena_comp_ctx *comp_ctx;
spin_lock_irqsave(&admin_queue->q_lock, flags);
@ -332,7 +332,7 @@ static int ena_com_init_io_sq(struct ena_com_dev *ena_dev,
memset(&io_sq->desc_addr, 0x0, sizeof(io_sq->desc_addr));
io_sq->dma_addr_bits = ena_dev->dma_addr_bits;
io_sq->dma_addr_bits = (u8)ena_dev->dma_addr_bits;
io_sq->desc_entry_size =
(io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) ?
sizeof(struct ena_eth_io_tx_desc) :
@ -486,7 +486,7 @@ static void ena_com_handle_admin_completion(struct ena_com_admin_queue *admin_qu
/* Go over all the completions */
while ((READ_ONCE(cqe->acq_common_descriptor.flags) &
ENA_ADMIN_ACQ_COMMON_DESC_PHASE_MASK) == phase) {
ENA_ADMIN_ACQ_COMMON_DESC_PHASE_MASK) == phase) {
/* Do not read the rest of the completion entry before the
* phase bit was validated
*/
@ -537,7 +537,8 @@ static int ena_com_comp_status_to_errno(u8 comp_status)
static int ena_com_wait_and_process_admin_cq_polling(struct ena_comp_ctx *comp_ctx,
struct ena_com_admin_queue *admin_queue)
{
unsigned long flags, timeout;
unsigned long flags = 0;
unsigned long timeout;
int ret;
timeout = jiffies + usecs_to_jiffies(admin_queue->completion_timeout);
@ -736,7 +737,7 @@ static int ena_com_config_llq_info(struct ena_com_dev *ena_dev,
static int ena_com_wait_and_process_admin_cq_interrupts(struct ena_comp_ctx *comp_ctx,
struct ena_com_admin_queue *admin_queue)
{
unsigned long flags;
unsigned long flags = 0;
int ret;
wait_for_completion_timeout(&comp_ctx->wait_event,
@ -782,7 +783,7 @@ static u32 ena_com_reg_bar_read32(struct ena_com_dev *ena_dev, u16 offset)
volatile struct ena_admin_ena_mmio_req_read_less_resp *read_resp =
mmio_read->read_resp;
u32 mmio_read_reg, ret, i;
unsigned long flags;
unsigned long flags = 0;
u32 timeout = mmio_read->reg_read_to;
might_sleep();
@ -1426,7 +1427,7 @@ void ena_com_abort_admin_commands(struct ena_com_dev *ena_dev)
void ena_com_wait_for_abort_completion(struct ena_com_dev *ena_dev)
{
struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
unsigned long flags;
unsigned long flags = 0;
spin_lock_irqsave(&admin_queue->q_lock, flags);
while (atomic_read(&admin_queue->outstanding_cmds) != 0) {
@ -1470,7 +1471,7 @@ bool ena_com_get_admin_running_state(struct ena_com_dev *ena_dev)
void ena_com_set_admin_running_state(struct ena_com_dev *ena_dev, bool state)
{
struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
unsigned long flags;
unsigned long flags = 0;
spin_lock_irqsave(&admin_queue->q_lock, flags);
ena_dev->admin_queue.running_state = state;
@ -1504,7 +1505,7 @@ int ena_com_set_aenq_config(struct ena_com_dev *ena_dev, u32 groups_flag)
}
if ((get_resp.u.aenq.supported_groups & groups_flag) != groups_flag) {
pr_warn("Trying to set unsupported aenq events. supported flag: %x asked flag: %x\n",
pr_warn("Trying to set unsupported aenq events. supported flag: 0x%x asked flag: 0x%x\n",
get_resp.u.aenq.supported_groups, groups_flag);
return -EOPNOTSUPP;
}
@ -1652,7 +1653,7 @@ int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev)
sizeof(*mmio_read->read_resp),
&mmio_read->read_resp_dma_addr, GFP_KERNEL);
if (unlikely(!mmio_read->read_resp))
return -ENOMEM;
goto err;
ena_com_mmio_reg_read_request_write_dev_addr(ena_dev);
@ -1661,6 +1662,10 @@ int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev)
mmio_read->readless_supported = true;
return 0;
err:
return -ENOMEM;
}
void ena_com_set_mmio_read_mode(struct ena_com_dev *ena_dev, bool readless_supported)
@ -1961,6 +1966,7 @@ void ena_com_aenq_intr_handler(struct ena_com_dev *dev, void *data)
struct ena_admin_aenq_entry *aenq_e;
struct ena_admin_aenq_common_desc *aenq_common;
struct ena_com_aenq *aenq = &dev->aenq;
unsigned long long timestamp;
ena_aenq_handler handler_cb;
u16 masked_head, processed = 0;
u8 phase;
@ -1978,10 +1984,11 @@ void ena_com_aenq_intr_handler(struct ena_com_dev *dev, void *data)
*/
dma_rmb();
timestamp =
(unsigned long long)aenq_common->timestamp_low |
((unsigned long long)aenq_common->timestamp_high << 32);
pr_debug("AENQ! Group[%x] Syndrom[%x] timestamp: [%llus]\n",
aenq_common->group, aenq_common->syndrom,
(u64)aenq_common->timestamp_low +
((u64)aenq_common->timestamp_high << 32));
aenq_common->group, aenq_common->syndrom, timestamp);
/* Handle specific event*/
handler_cb = ena_com_get_specific_aenq_cb(dev,
@ -2623,8 +2630,8 @@ int ena_com_allocate_host_info(struct ena_com_dev *ena_dev)
if (unlikely(!host_attr->host_info))
return -ENOMEM;
host_attr->host_info->ena_spec_version =
((ENA_COMMON_SPEC_VERSION_MAJOR << ENA_REGS_VERSION_MAJOR_VERSION_SHIFT) |
host_attr->host_info->ena_spec_version = ((ENA_COMMON_SPEC_VERSION_MAJOR <<
ENA_REGS_VERSION_MAJOR_VERSION_SHIFT) |
(ENA_COMMON_SPEC_VERSION_MINOR));
return 0;

5
drivers/net/ethernet/amazon/ena/ena_netdev.c
View File

@ -2599,15 +2599,14 @@ static void ena_destroy_device(struct ena_adapter *adapter, bool graceful)
dev_up = test_bit(ENA_FLAG_DEV_UP, &adapter->flags);
adapter->dev_up_before_reset = dev_up;
if (!graceful)
ena_com_set_admin_running_state(ena_dev, false);
if (test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
ena_down(adapter);
/* Before releasing the ENA resources, a device reset is required.
* (to prevent the device from accessing them).
/* Stop the device from sending AENQ events (in case reset flag is set
* and device is up, ena_close already reset the device
* In case the reset flag is set and the device is up, ena_down()
* already perform the reset, so it can be skipped.
*/

22
drivers/net/ethernet/amazon/ena/ena_netdev.h
View File

@ -61,6 +61,17 @@
#define ENA_ADMIN_MSIX_VEC 1
#define ENA_MAX_MSIX_VEC(io_queues) (ENA_ADMIN_MSIX_VEC + (io_queues))
/* The ENA buffer length fields is 16 bit long. So when PAGE_SIZE == 64kB the
* driver passes 0.
* Since the max packet size the ENA handles is ~9kB limit the buffer length to
* 16kB.
*/
#if PAGE_SIZE > SZ_16K
#define ENA_PAGE_SIZE SZ_16K
#else
#define ENA_PAGE_SIZE PAGE_SIZE
#endif
#define ENA_MIN_MSIX_VEC 2
#define ENA_REG_BAR 0
@ -362,15 +373,4 @@ void ena_dump_stats_to_buf(struct ena_adapter *adapter, u8 *buf);
int ena_get_sset_count(struct net_device *netdev, int sset);
/* The ENA buffer length fields is 16 bit long. So when PAGE_SIZE == 64kB the
* driver passas 0.
* Since the max packet size the ENA handles is ~9kB limit the buffer length to
* 16kB.
*/
#if PAGE_SIZE > SZ_16K
#define ENA_PAGE_SIZE SZ_16K
#else
#define ENA_PAGE_SIZE PAGE_SIZE
#endif
#endif /* !(ENA_H) */