[PATCH] myri10ge - Write the firmware in 256-bytes chunks

When writing the firmware to the NIC, the FIFO is 256-bytes long,
so we use 256-bytes chunks and a read to wait until the previous
write is done.

Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 7 insertions, 12 deletions

diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c
index c3e52c806b13..198c6f0e0105 100644
--- a/drivers/net/myri10ge/myri10ge.c
+++ b/drivers/net/myri10ge/myri10ge.c
@@ -448,6 +448,7 @@ static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
         struct mcp_gen_header *hdr;
         size_t hdr_offset;
         int status;
+        unsigned i;
 
         if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) {
                 dev_err(dev, "Unable to load %s firmware image via hotplug\n",
@@ -479,18 +480,12 @@ static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
                 goto abort_with_fw;
 
         crc = crc32(~0, fw->data, fw->size);
-        if (mgp->tx.boundary == 2048) {
-                /* Avoid PCI burst on chipset with unaligned completions. */
-                int i;
-                __iomem u32 *ptr = (__iomem u32 *) (mgp->sram +
-                                                    MYRI10GE_FW_OFFSET);
-                for (i = 0; i < fw->size / 4; i++) {
-                        __raw_writel(((u32 *) fw->data)[i], ptr + i);
-                        wmb();
-                }
-        } else {
-                myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET, fw->data,
-                                  fw->size);
+        for (i = 0; i < fw->size; i += 256) {
+                myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i,
+                                  fw->data + i,
+                                  min(256U, (unsigned)(fw->size - i)));
+                mb();
+                readb(mgp->sram);
         }
         /* corruption checking is good for parity recovery and buggy chipset */
         memcpy_fromio(fw->data, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);