[3/7] dma/idxd: replace rte atomics with GCC builtin atomics
Checks
Commit Message
Replace the use of rte_atomic.h types and functions, instead use GCC
supplied C++11 memory model builtins.
Signed-off-by: Tyler Retzlaff <roretzla@linux.microsoft.com>
---
drivers/dma/idxd/idxd_internal.h | 3 +--
drivers/dma/idxd/idxd_pci.c | 6 +++---
2 files changed, 4 insertions(+), 5 deletions(-)
@@ -7,7 +7,6 @@
#include <rte_dmadev_pmd.h>
#include <rte_spinlock.h>
-#include <rte_atomic.h>
#include "idxd_hw_defs.h"
@@ -34,7 +33,7 @@ struct idxd_pci_common {
rte_spinlock_t lk;
uint8_t wq_cfg_sz;
- rte_atomic16_t ref_count;
+ int16_t ref_count;
volatile struct rte_idxd_bar0 *regs;
volatile uint32_t *wq_regs_base;
volatile struct rte_idxd_grpcfg *grp_regs;
@@ -6,7 +6,6 @@
#include <rte_devargs.h>
#include <rte_dmadev_pmd.h>
#include <rte_malloc.h>
-#include <rte_atomic.h>
#include "idxd_internal.h"
@@ -136,7 +135,8 @@
/* if this is the last WQ on the device, disable the device and free
* the PCI struct
*/
- is_last_wq = rte_atomic16_dec_and_test(&idxd->u.pci->ref_count);
+ is_last_wq = __atomic_fetch_sub(&idxd->u.pci->ref_count, 1,
+ __ATOMIC_SEQ_CST) - 1 == 0;
if (is_last_wq) {
/* disable the device */
err_code = idxd_pci_dev_command(idxd, idxd_disable_dev);
@@ -350,7 +350,7 @@
free(idxd.u.pci);
return ret;
}
- rte_atomic16_inc(&idxd.u.pci->ref_count);
+ __atomic_fetch_add(&idxd.u.pci->ref_count, 1, __ATOMIC_SEQ_CST);
}
return 0;