diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/701-net-0040-fsl_qbman-usdpaa-Invalidate-software-portals-before-.patch')
-rw-r--r-- | target/linux/layerscape/patches-5.4/701-net-0040-fsl_qbman-usdpaa-Invalidate-software-portals-before-.patch | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0040-fsl_qbman-usdpaa-Invalidate-software-portals-before-.patch b/target/linux/layerscape/patches-5.4/701-net-0040-fsl_qbman-usdpaa-Invalidate-software-portals-before-.patch new file mode 100644 index 0000000000..5148f444dc --- /dev/null +++ b/target/linux/layerscape/patches-5.4/701-net-0040-fsl_qbman-usdpaa-Invalidate-software-portals-before-.patch @@ -0,0 +1,64 @@ +From 6506f95ad4d47500275c2f3a48abb7f3de11c54b Mon Sep 17 00:00:00 2001 +From: Roy Pledge <roy.pledge@nxp.com> +Date: Thu, 25 May 2017 16:59:08 -0400 +Subject: [PATCH] fsl_qbman/usdpaa: Invalidate software portals before use + +Invalidate the cache for the software portals before using them +since the portals are non coherent. This ensures that the core +using the portal is seeing the most up to date information in +case the cache contained older data. This is important during +the cleanup phase if cleanup occurs on a differnt core than +what the application was using. + +Signed-off-by: Roy Pledge <roy.pledge@nxp.com> +--- + drivers/staging/fsl_qbman/fsl_usdpaa.c | 24 ++++++++++++++++++++++++ + 1 file changed, 24 insertions(+) + +--- a/drivers/staging/fsl_qbman/fsl_usdpaa.c ++++ b/drivers/staging/fsl_qbman/fsl_usdpaa.c +@@ -371,6 +371,16 @@ static int usdpaa_open(struct inode *ino + + #define DQRR_MAXFILL 15 + ++ ++/* Invalidate a portal */ ++void dbci_portal(void *addr) ++{ ++ int i; ++ ++ for (i = 0; i < 0x4000; i += 64) ++ dcbi(addr + i); ++} ++ + /* Reset a QMan portal to its default state */ + static int init_qm_portal(struct qm_portal_config *config, + struct qm_portal *portal) +@@ -384,6 +394,13 @@ static int init_qm_portal(struct qm_port + /* Make sure interrupts are inhibited */ + qm_out(IIR, 1); + ++ /* ++ * Invalidate the entire CE portal are to ensure no stale ++ * cachelines are present. This should be done on all ++ * cores as the portal is mapped as M=0 (non-coherent). ++ */ ++ on_each_cpu(dbci_portal, portal->addr.addr_ce, 1); ++ + /* Initialize the DQRR. This will stop any dequeue + commands that are in progress */ + if (qm_dqrr_init(portal, config, qm_dqrr_dpush, qm_dqrr_pvb, +@@ -435,6 +452,13 @@ static int init_bm_portal(struct bm_port + portal->addr.addr_ce = config->addr_virt[DPA_PORTAL_CE]; + portal->addr.addr_ci = config->addr_virt[DPA_PORTAL_CI]; + ++ /* ++ * Invalidate the entire CE portal are to ensure no stale ++ * cachelines are present. This should be done on all ++ * cores as the portal is mapped as M=0 (non-coherent). ++ */ ++ on_each_cpu(dbci_portal, portal->addr.addr_ce, 1); ++ + if (bm_rcr_init(portal, bm_rcr_pvb, bm_rcr_cce)) { + pr_err("Bman RCR initialisation failed\n"); + return 1; |