4 files changed, 61 insertions, 1 deletions

diff --git a/sys/dev/bnxt/bnxt.h b/sys/dev/bnxt/bnxt.h
index 543cfdbc109a..bd0691487cdc 100644
--- a/sys/dev/bnxt/bnxt.h
+++ b/sys/dev/bnxt/bnxt.h
@@ -561,6 +561,7 @@ struct bnxt_softc {
 #define BNXT_FLAG_VF		0x0001
 #define BNXT_FLAG_NPAR		0x0002
 #define BNXT_FLAG_WOL_CAP	0x0004
+#define BNXT_FLAG_SHORT_CMD	0x0008 
 	uint32_t		flags;
 	uint32_t		total_msix;
 
@@ -572,6 +573,7 @@ struct bnxt_softc {
 	uint16_t		hwrm_cmd_seq;
 	uint32_t		hwrm_cmd_timeo;	/* milliseconds */
 	struct iflib_dma_info	hwrm_cmd_resp;
+	struct iflib_dma_info	hwrm_short_cmd_req_addr;
 	/* Interrupt info for HWRM */
 	struct if_irq		irq;
 	struct mtx		hwrm_lock;
diff --git a/sys/dev/bnxt/bnxt_hwrm.c b/sys/dev/bnxt/bnxt_hwrm.c
index 45530e200102..0ccfb02cc5e5 100644
--- a/sys/dev/bnxt/bnxt_hwrm.c
+++ b/sys/dev/bnxt/bnxt_hwrm.c
@@ -122,12 +122,37 @@ _hwrm_send_message(struct bnxt_softc *softc, void *msg, uint32_t msg_len)
 	uint16_t cp_ring_id;
 	uint8_t *valid;
 	uint16_t err;
+	uint16_t max_req_len = HWRM_MAX_REQ_LEN;
+	struct hwrm_short_input short_input = {0};
 
 	/* TODO: DMASYNC in here. */
 	req->seq_id = htole16(softc->hwrm_cmd_seq++);
 	memset(resp, 0, PAGE_SIZE);
 	cp_ring_id = le16toh(req->cmpl_ring);
 
+	if (softc->flags & BNXT_FLAG_SHORT_CMD) {
+		void *short_cmd_req = softc->hwrm_short_cmd_req_addr.idi_vaddr;
+
+		memcpy(short_cmd_req, req, msg_len);
+		memset((uint8_t *) short_cmd_req + msg_len, 0, softc->hwrm_max_req_len-
+		    msg_len);
+
+		short_input.req_type = req->req_type;
+		short_input.signature =
+		    htole16(HWRM_SHORT_INPUT_SIGNATURE_SHORT_CMD);
+		short_input.size = htole16(msg_len);
+		short_input.req_addr =
+		    htole64(softc->hwrm_short_cmd_req_addr.idi_paddr);
+
+		data = (uint32_t *)&short_input;
+		msg_len = sizeof(short_input);
+
+		/* Sync memory write before updating doorbell */
+		wmb();
+
+		max_req_len = BNXT_HWRM_SHORT_REQ_LEN;
+	}
+
 	/* Write request msg to hwrm channel */
 	for (i = 0; i < msg_len; i += 4) {
 		bus_space_write_4(softc->hwrm_bar.tag,
@@ -137,7 +162,7 @@ _hwrm_send_message(struct bnxt_softc *softc, void *msg, uint32_t msg_len)
 	}
 
 	/* Clear to the end of the request buffer */
-	for (i = msg_len; i < HWRM_MAX_REQ_LEN; i += 4)
+	for (i = msg_len; i < max_req_len; i += 4)
 		bus_space_write_4(softc->hwrm_bar.tag, softc->hwrm_bar.handle,
 		    i, 0);
 
@@ -248,6 +273,7 @@ bnxt_hwrm_ver_get(struct bnxt_softc *softc)
 	int				rc;
 	const char nastr[] = "<not installed>";
 	const char naver[] = "<N/A>";
+	uint32_t dev_caps_cfg;
 
 	softc->hwrm_max_req_len = HWRM_MAX_REQ_LEN;
 	softc->hwrm_cmd_timeo = 1000;
@@ -323,6 +349,11 @@ bnxt_hwrm_ver_get(struct bnxt_softc *softc)
 	if (resp->def_req_timeout)
 		softc->hwrm_cmd_timeo = le16toh(resp->def_req_timeout);
 
+	dev_caps_cfg = le32toh(resp->dev_caps_cfg);
+	if ((dev_caps_cfg & HWRM_VER_GET_OUTPUT_DEV_CAPS_CFG_SHORT_CMD_SUPPORTED) &&
+	    (dev_caps_cfg & HWRM_VER_GET_OUTPUT_DEV_CAPS_CFG_SHORT_CMD_REQUIRED))
+		softc->flags |= BNXT_FLAG_SHORT_CMD;
+
 fail:
 	BNXT_HWRM_UNLOCK(softc);
 	return rc;
diff --git a/sys/dev/bnxt/bnxt_hwrm.h b/sys/dev/bnxt/bnxt_hwrm.h
index 28f3c08f6083..610ac7ce2e10 100644
--- a/sys/dev/bnxt/bnxt_hwrm.h
+++ b/sys/dev/bnxt/bnxt_hwrm.h
@@ -36,6 +36,7 @@ __FBSDID("$FreeBSD$");
 #define BNXT_PAUSE_RX 	 (HWRM_PORT_PHY_QCFG_OUTPUT_PAUSE_RX)
 #define BNXT_AUTO_PAUSE_AUTONEG_PAUSE  				\
         (HWRM_PORT_PHY_QCFG_OUTPUT_AUTO_PAUSE_AUTONEG_PAUSE)
+#define BNXT_HWRM_SHORT_REQ_LEN	sizeof(struct hwrm_short_input)
 
 /* HWRM Function Prototypes */
 int bnxt_alloc_hwrm_dma_mem(struct bnxt_softc *softc);
diff --git a/sys/dev/bnxt/if_bnxt.c b/sys/dev/bnxt/if_bnxt.c
index dee60be8cffd..6d2e5330fccf 100644
--- a/sys/dev/bnxt/if_bnxt.c
+++ b/sys/dev/bnxt/if_bnxt.c
@@ -643,6 +643,23 @@ cp_alloc_fail:
 	return rc;
 }
 
+static void bnxt_free_hwrm_short_cmd_req(struct bnxt_softc *softc)
+{
+	if (softc->hwrm_short_cmd_req_addr.idi_vaddr)
+		iflib_dma_free(&softc->hwrm_short_cmd_req_addr);
+	softc->hwrm_short_cmd_req_addr.idi_vaddr = NULL;
+}
+
+static int bnxt_alloc_hwrm_short_cmd_req(struct bnxt_softc *softc)
+{
+	int rc;
+
+	rc = iflib_dma_alloc(softc->ctx, softc->hwrm_max_req_len,
+	    &softc->hwrm_short_cmd_req_addr, BUS_DMA_NOWAIT);
+
+	return rc;
+}
+
 /* Device setup and teardown */
 static int
 bnxt_attach_pre(if_ctx_t ctx)
@@ -714,6 +731,12 @@ bnxt_attach_pre(if_ctx_t ctx)
 		goto ver_fail;
 	}
 
+	if (softc->flags & BNXT_FLAG_SHORT_CMD) {
+		rc = bnxt_alloc_hwrm_short_cmd_req(softc);
+		if (rc)
+			goto hwrm_short_cmd_alloc_fail;
+	}
+
 	/* Get NVRAM info */
 	if (BNXT_PF(softc)) {
 		softc->nvm_info = malloc(sizeof(struct bnxt_nvram_info),
@@ -902,6 +925,8 @@ drv_rgtr_fail:
 	if (BNXT_PF(softc))
 		free(softc->nvm_info, M_DEVBUF);
 nvm_alloc_fail:
+	bnxt_free_hwrm_short_cmd_req(softc);
+hwrm_short_cmd_alloc_fail:
 ver_fail:
 	free(softc->ver_info, M_DEVBUF);
 ver_alloc_fail:
@@ -974,6 +999,7 @@ bnxt_detach(if_ctx_t ctx)
 
 	bnxt_hwrm_func_drv_unrgtr(softc, false);
 	bnxt_free_hwrm_dma_mem(softc);
+	bnxt_free_hwrm_short_cmd_req(softc);
 	BNXT_HWRM_LOCK_DESTROY(softc);
 
 	pci_disable_busmaster(softc->dev);