@@ -46,27 +46,19 @@
#include <linux/sort.h>
#include <linux/spinlock.h>
-#define CMD_ID_SHIFT 0
-#define CMD_ID_MASK 0x7f
-#define CMD_TOKEN_ID_SHIFT 8
-#define CMD_TOKEN_ID_MASK 0xff
-#define CMD_DATA_SIZE_SHIFT 16
-#define CMD_DATA_SIZE_MASK 0x1ff
-#define CMD_LEGACY_DATA_SIZE_SHIFT 20
-#define CMD_LEGACY_DATA_SIZE_MASK 0x1ff
-#define PACK_SCPI_CMD(cmd_id, tx_sz) \
- ((((cmd_id) & CMD_ID_MASK) << CMD_ID_SHIFT) | \
- (((tx_sz) & CMD_DATA_SIZE_MASK) << CMD_DATA_SIZE_SHIFT))
-#define ADD_SCPI_TOKEN(cmd, token) \
- ((cmd) |= (((token) & CMD_TOKEN_ID_MASK) << CMD_TOKEN_ID_SHIFT))
-#define PACK_LEGACY_SCPI_CMD(cmd_id, tx_sz) \
- ((((cmd_id) & CMD_ID_MASK) << CMD_ID_SHIFT) | \
- (((tx_sz) & CMD_LEGACY_DATA_SIZE_MASK) << CMD_LEGACY_DATA_SIZE_SHIFT))
-
-#define CMD_SIZE(cmd) (((cmd) >> CMD_DATA_SIZE_SHIFT) & CMD_DATA_SIZE_MASK)
-#define CMD_LEGACY_SIZE(cmd) (((cmd) >> CMD_LEGACY_DATA_SIZE_SHIFT) & \
- CMD_LEGACY_DATA_SIZE_MASK)
-#define CMD_UNIQ_MASK (CMD_TOKEN_ID_MASK << CMD_TOKEN_ID_SHIFT | CMD_ID_MASK)
+#define CMD_ID_MASK GENMASK(6, 0)
+#define CMD_TOKEN_ID_MASK GENMASK(15, 8)
+#define CMD_DATA_SIZE_MASK GENMASK(24, 16)
+#define CMD_LEGACY_DATA_SIZE_MASK GENMASK(28, 20)
+#define PACK_SCPI_CMD(cmd_id, tx_sz) \
+ (FIELD_PREP(CMD_ID_MASK, cmd_id) | \
+ FIELD_PREP(CMD_DATA_SIZE_MASK, tx_sz))
+#define PACK_LEGACY_SCPI_CMD(cmd_id, tx_sz) \
+ (FIELD_PREP(CMD_ID_MASK, cmd_id) | \
+ FIELD_PREP(CMD_LEGACY_DATA_SIZE_MASK, tx_sz))
+
+#define CMD_SIZE(cmd) FIELD_GET(CMD_DATA_SIZE_MASK, cmd)
+#define CMD_UNIQ_MASK (CMD_TOKEN_ID_MASK | CMD_ID_MASK)
#define CMD_XTRACT_UNIQ(cmd) ((cmd) & CMD_UNIQ_MASK)
#define SCPI_SLOT 0
@@ -412,7 +404,7 @@ static void scpi_process_cmd(struct scpi_chan *ch, u32 cmd)
} else {
struct scpi_shared_mem __iomem *mem = ch->rx_payload;
- len = min(match->rx_len, CMD_SIZE(cmd));
+ len = min_t(unsigned int, match->rx_len, CMD_SIZE(cmd));
match->status = ioread32(&mem->status);
memcpy_fromio(match->rx_buf, mem->payload, len);
@@ -454,7 +446,7 @@ static void scpi_tx_prepare(struct mbox_client *c, void *msg)
if (t->rx_buf) {
if (!(++ch->token))
++ch->token;
- ADD_SCPI_TOKEN(t->cmd, ch->token);
+ t->cmd |= FIELD_PREP(CMD_TOKEN_ID_MASK, ch->token);
spin_lock_irqsave(&ch->rx_lock, flags);
list_add_tail(&t->node, &ch->rx_pending);
spin_unlock_irqrestore(&ch->rx_lock, flags);
Macro definitions can be simplified by making use of the FIELD_GET/_PREP bitfield macros. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> --- drivers/firmware/arm_scpi.c | 38 +++++++++++++++----------------------- 1 file changed, 15 insertions(+), 23 deletions(-)