[dpdk-dev] [PATCH v2 2/8] bus/fslmc: run secondary debug app without blocklist devices

["Sachin Saxena (OSS)" <sachin.saxena@oss.nxp.com>]

From: Rohit Raj <rohit.raj@nxp.com>

dpaa2 hw impose limits on some HW access devices like DPMCP(Mnagement
control Port) and DPIO (HW portal). This causes issue in their usages in
shared uses in case of multi-process applications. It can overcome by using
allowlist/blocklist in primary and secondary applications.
However it imposes restrictions on standard debugging apps like
dpdk-procinfo, which can be used to debug any existing application.

This patch introduces reserving extra DPMCP and DPIO to be used by
secondary process if devices are not blocked previously in primary
application.
This leaves the last DPMCP and DPIO for the secondary process usages.

Signed-off-by: Rohit Raj <rohit.raj@nxp.com>
Reviewed-by: Sachin Saxena <sachin.saxena@oss.nxp.com>
---
 drivers/bus/fslmc/fslmc_vfio.c | 66 +++++++++++++++++++++++++++++++---
 1 file changed, 61 insertions(+), 5 deletions(-)

diff --git a/drivers/bus/fslmc/fslmc_vfio.c b/drivers/bus/fslmc/fslmc_vfio.c
index 9134ec552..6dd797632 100644
--- a/drivers/bus/fslmc/fslmc_vfio.c
+++ b/drivers/bus/fslmc/fslmc_vfio.c
@@ -802,10 +802,29 @@ fslmc_vfio_process_group(void)
 	int ret;
 	int found_mportal = 0;
 	struct rte_dpaa2_device *dev, *dev_temp;
+	bool is_dpmcp_in_blocklist = false, is_dpio_in_blocklist = false;
+	int dpmcp_count = 0, dpio_count = 0, current_device;
+
+	TAILQ_FOREACH_SAFE(dev, &rte_fslmc_bus.device_list, next, dev_temp) {
+		if (dev->dev_type == DPAA2_MPORTAL) {
+			dpmcp_count++;
+			if (dev->device.devargs &&
+			    dev->device.devargs->policy == RTE_DEV_BLACKLISTED)
+				is_dpmcp_in_blocklist = true;
+		}
+		if (dev->dev_type == DPAA2_IO) {
+			dpio_count++;
+			if (dev->device.devargs &&
+			    dev->device.devargs->policy == RTE_DEV_BLACKLISTED)
+				is_dpmcp_in_blocklist = true;
+		}
+	}
 
 	/* Search the MCP as that should be initialized first. */
+	current_device = 0;
 	TAILQ_FOREACH_SAFE(dev, &rte_fslmc_bus.device_list, next, dev_temp) {
 		if (dev->dev_type == DPAA2_MPORTAL) {
+			current_device++;
 			if (dev->device.devargs &&
 			    dev->device.devargs->policy == RTE_DEV_BLACKLISTED) {
 				DPAA2_BUS_LOG(DEBUG, "%s Blacklisted, skipping",
@@ -815,13 +834,24 @@ fslmc_vfio_process_group(void)
 				continue;
 			}
 
-			ret = fslmc_process_mcp(dev);
-			if (ret) {
-				DPAA2_BUS_ERR("Unable to map MC Portal");
-				return -1;
+			if (rte_eal_process_type() == RTE_PROC_SECONDARY &&
+			    !is_dpmcp_in_blocklist) {
+				if (dpmcp_count == 1 ||
+				    current_device != dpmcp_count) {
+					TAILQ_REMOVE(&rte_fslmc_bus.device_list,
+						     dev, next);
+					continue;
+				}
 			}
-			if (!found_mportal)
+
+			if (!found_mportal) {
+				ret = fslmc_process_mcp(dev);
+				if (ret) {
+					DPAA2_BUS_ERR("Unable to map MC Portal");
+					return -1;
+				}
 				found_mportal = 1;
+			}
 
 			TAILQ_REMOVE(&rte_fslmc_bus.device_list, dev, next);
 			free(dev);
@@ -838,7 +868,10 @@ fslmc_vfio_process_group(void)
 		return -1;
 	}
 
+	current_device = 0;
 	TAILQ_FOREACH_SAFE(dev, &rte_fslmc_bus.device_list, next, dev_temp) {
+		if (dev->dev_type == DPAA2_IO)
+			current_device++;
 		if (dev->device.devargs &&
 		    dev->device.devargs->policy == RTE_DEV_BLACKLISTED) {
 			DPAA2_BUS_LOG(DEBUG, "%s Blacklisted, skipping",
@@ -846,6 +879,14 @@ fslmc_vfio_process_group(void)
 			TAILQ_REMOVE(&rte_fslmc_bus.device_list, dev, next);
 			continue;
 		}
+		if (rte_eal_process_type() == RTE_PROC_SECONDARY &&
+		    dev->dev_type != DPAA2_ETH &&
+		    dev->dev_type != DPAA2_CRYPTO &&
+		    dev->dev_type != DPAA2_QDMA &&
+		    dev->dev_type != DPAA2_IO) {
+			TAILQ_REMOVE(&rte_fslmc_bus.device_list, dev, next);
+			continue;
+		}
 		switch (dev->dev_type) {
 		case DPAA2_ETH:
 		case DPAA2_CRYPTO:
@@ -882,6 +923,21 @@ fslmc_vfio_process_group(void)
 
 			break;
 		case DPAA2_IO:
+			if (!is_dpio_in_blocklist && dpio_count > 1) {
+				if (rte_eal_process_type() == RTE_PROC_SECONDARY
+				    && current_device != dpio_count) {
+					TAILQ_REMOVE(&rte_fslmc_bus.device_list,
+						     dev, next);
+					break;
+				}
+				if (rte_eal_process_type() == RTE_PROC_PRIMARY
+				    && current_device == dpio_count) {
+					TAILQ_REMOVE(&rte_fslmc_bus.device_list,
+						     dev, next);
+					break;
+				}
+			}
+
 			ret = fslmc_process_iodevices(dev);
 			if (ret) {
 				DPAA2_BUS_DEBUG("Dev (%s) init failed",
-- 
2.28.0