[PATCH 040/111] PCI-RASTA: set GRPCI1 target cache-line-size to avoid poor performance

[Daniel Hellstrom]

---
 .../lib/libbsp/sparc/shared/pci/gr_rasta_adcdac.c  |    6 ++++++
 c/src/lib/libbsp/sparc/shared/pci/gr_rasta_io.c    |    6 ++++++
 c/src/lib/libbsp/sparc/shared/pci/gr_rasta_tmtc.c  |    6 ++++++
 3 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/c/src/lib/libbsp/sparc/shared/pci/gr_rasta_adcdac.c 
b/c/src/lib/libbsp/sparc/shared/pci/gr_rasta_adcdac.c
index 21ca52c..3ee6293 100644
--- a/c/src/lib/libbsp/sparc/shared/pci/gr_rasta_adcdac.c
+++ b/c/src/lib/libbsp/sparc/shared/pci/gr_rasta_adcdac.c
@@ -243,6 +243,12 @@ int gr_rasta_adcdac_hw_init1(struct gr_rasta_adcdac_priv 
*priv)
        pci_cfg_r32(priv->pcidev, PCI_COMMAND, &data);
        pci_cfg_w32(priv->pcidev, PCI_COMMAND, (data|PCI_COMMAND_PARITY));
 
+       /* Setup cache line size. Default cache line size will result in
+        * poor performance (256 word fetches), 0xff will set it according
+        * to the max size of the PCI FIFO.
+        */
+       pci_cfg_w8(priv->pcidev, PCI_CACHE_LINE_SIZE, 0xff);
+
        /* Scan AMBA Plug&Play */
 
        /* AMBA MAP bar0 (in CPU) ==> 0x80000000(remote amba address) */
diff --git a/c/src/lib/libbsp/sparc/shared/pci/gr_rasta_io.c 
b/c/src/lib/libbsp/sparc/shared/pci/gr_rasta_io.c
index f96676d..dca0aa0 100644
--- a/c/src/lib/libbsp/sparc/shared/pci/gr_rasta_io.c
+++ b/c/src/lib/libbsp/sparc/shared/pci/gr_rasta_io.c
@@ -260,6 +260,12 @@ int gr_rasta_io_hw_init(struct gr_rasta_io_priv *priv)
        }
 #endif
 
+       /* Setup cache line size. Default cache line size will result in
+        * poor performance (256 word fetches), 0xff will set it according
+        * to the max size of the PCI FIFO.
+        */
+       pci_cfg_w8(priv->pcidev, PCI_CACHE_LINE_SIZE, 0xff);
+
        /* Scan AMBA Plug&Play */
 
        /* AMBA MAP bar0 (in CPU) ==> 0x80000000(remote amba address) */
diff --git a/c/src/lib/libbsp/sparc/shared/pci/gr_rasta_tmtc.c 
b/c/src/lib/libbsp/sparc/shared/pci/gr_rasta_tmtc.c
index 7a10083..823cd9e 100644
--- a/c/src/lib/libbsp/sparc/shared/pci/gr_rasta_tmtc.c
+++ b/c/src/lib/libbsp/sparc/shared/pci/gr_rasta_tmtc.c
@@ -250,6 +250,12 @@ int gr_rasta_tmtc_hw_init(struct gr_rasta_tmtc_priv *priv)
        }
 #endif
 
+       /* Setup cache line size. Default cache line size will result in
+        * poor performance (256 word fetches), 0xff will set it according
+        * to the max size of the PCI FIFO.
+        */
+       pci_cfg_w8(pcidev, PCI_CACHE_LINE_SIZE, 0xff);
+
        /* Scan AMBA Plug&Play */
 
        /* AMBA MAP bar0 (in CPU) ==> 0x80000000(remote amba address) */
-- 
1.7.0.4

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