5 files changed, 70 insertions, 8 deletions

diff --git a/arch/mips/cavium-octeon/Kconfig b/arch/mips/cavium-octeon/Kconfig
index 4984e462be30..c1899f109e19 100644
--- a/arch/mips/cavium-octeon/Kconfig
+++ b/arch/mips/cavium-octeon/Kconfig
@@ -67,6 +67,18 @@ config CAVIUM_OCTEON_LOCK_L2_MEMCPY
 	help
 	  Lock the kernel's implementation of memcpy() into L2.
 
+config CAVIUM_RESERVE32
+	int "Memory to reserve for user processes shared region (MB)"
+	range 0 1536
+	default "0"
+	help
+	  Reserve a shared memory region for user processes to use for hardware
+	  memory buffers. This is required for 32bit applications to be able to
+	  send and receive packets directly. Applications access this memory by
+	  memory mapping /dev/mem for the addresses in /proc/octeon_info. For
+	  optimal performance with HugeTLBs, keep this size an even number of
+	  megabytes.
+
 config OCTEON_ILM
 	tristate "Module to measure interrupt latency using Octeon CIU Timer"
 	help
diff --git a/arch/mips/cavium-octeon/executive/cvmx-cmd-queue.c b/arch/mips/cavium-octeon/executive/cvmx-cmd-queue.c
index 20189e9ad94d..bf13e35871b2 100644
--- a/arch/mips/cavium-octeon/executive/cvmx-cmd-queue.c
+++ b/arch/mips/cavium-octeon/executive/cvmx-cmd-queue.c
@@ -57,14 +57,27 @@ EXPORT_SYMBOL_GPL(__cvmx_cmd_queue_state_ptr);
 static cvmx_cmd_queue_result_t __cvmx_cmd_queue_init_state_ptr(void)
 {
 	char *alloc_name = "cvmx_cmd_queues";
+#if defined(CONFIG_CAVIUM_RESERVE32) && CONFIG_CAVIUM_RESERVE32
+	extern uint64_t octeon_reserve32_memory;
+#endif
 
 	if (likely(__cvmx_cmd_queue_state_ptr))
 		return CVMX_CMD_QUEUE_SUCCESS;
 
-	__cvmx_cmd_queue_state_ptr =
-		cvmx_bootmem_alloc_named(sizeof(*__cvmx_cmd_queue_state_ptr),
-					 128,
-					 alloc_name);
+#if defined(CONFIG_CAVIUM_RESERVE32) && CONFIG_CAVIUM_RESERVE32
+	if (octeon_reserve32_memory)
+		__cvmx_cmd_queue_state_ptr =
+		    cvmx_bootmem_alloc_named_range(sizeof(*__cvmx_cmd_queue_state_ptr),
+						   octeon_reserve32_memory,
+						   octeon_reserve32_memory +
+						   (CONFIG_CAVIUM_RESERVE32 <<
+						    20) - 1, 128, alloc_name);
+	else
+#endif
+		__cvmx_cmd_queue_state_ptr =
+		    cvmx_bootmem_alloc_named(sizeof(*__cvmx_cmd_queue_state_ptr),
+					    128,
+					    alloc_name);
 	if (__cvmx_cmd_queue_state_ptr)
 		memset(__cvmx_cmd_queue_state_ptr, 0,
 		       sizeof(*__cvmx_cmd_queue_state_ptr));
diff --git a/arch/mips/cavium-octeon/executive/cvmx-helper-board.c b/arch/mips/cavium-octeon/executive/cvmx-helper-board.c
index 1daa0c6b6f4e..d09d0769f549 100644
--- a/arch/mips/cavium-octeon/executive/cvmx-helper-board.c
+++ b/arch/mips/cavium-octeon/executive/cvmx-helper-board.c
@@ -282,9 +282,9 @@ union cvmx_helper_link_info __cvmx_helper_board_link_get(int ipd_port)
  * support and should return the number of actual ports on the
  * board.
  *
- * This function must be modifed for every new Octeon board.
+ * This function must be modified for every new Octeon board.
  * Internally it uses switch statements based on the cvmx_sysinfo
- * data to determine board types and revisions. It relys on the
+ * data to determine board types and revisions. It relies on the
  * fact that every Octeon board receives a unique board type
  * enumeration from the bootloader.
  *
diff --git a/arch/mips/cavium-octeon/octeon-platform.c b/arch/mips/cavium-octeon/octeon-platform.c
index a994022e32c9..ce05c0dd3acd 100644
--- a/arch/mips/cavium-octeon/octeon-platform.c
+++ b/arch/mips/cavium-octeon/octeon-platform.c
@@ -86,11 +86,12 @@ static void octeon2_usb_clocks_start(struct device *dev)
 					 "refclk-frequency", &clock_rate);
 		if (i) {
 			dev_err(dev, "No UCTL \"refclk-frequency\"\n");
+			of_node_put(uctl_node);
 			goto exit;
 		}
 		i = of_property_read_string(uctl_node,
 					    "refclk-type", &clock_type);
-
+		of_node_put(uctl_node);
 		if (!i && strcmp("crystal", clock_type) == 0)
 			is_crystal_clock = true;
 	}
diff --git a/arch/mips/cavium-octeon/setup.c b/arch/mips/cavium-octeon/setup.c
index 00bf269763cf..cbd83205518d 100644
--- a/arch/mips/cavium-octeon/setup.c
+++ b/arch/mips/cavium-octeon/setup.c
@@ -284,6 +284,11 @@ void octeon_crash_smp_send_stop(void)
 
 #endif /* CONFIG_KEXEC */
 
+#ifdef CONFIG_CAVIUM_RESERVE32
+uint64_t octeon_reserve32_memory;
+EXPORT_SYMBOL(octeon_reserve32_memory);
+#endif
+
 #ifdef CONFIG_KEXEC
 /* crashkernel cmdline parameter is parsed _after_ memory setup
  * we also parse it here (workaround for EHB5200) */
@@ -661,7 +666,9 @@ void __init prom_init(void)
 	int i;
 	u64 t;
 	int argc;
-
+#ifdef CONFIG_CAVIUM_RESERVE32
+	int64_t addr = -1;
+#endif
 	/*
 	 * The bootloader passes a pointer to the boot descriptor in
 	 * $a3, this is available as fw_arg3.
@@ -776,6 +783,25 @@ void __init prom_init(void)
 		cvmx_write_csr(CVMX_LED_UDD_DATX(1), 0);
 		cvmx_write_csr(CVMX_LED_EN, 1);
 	}
+#ifdef CONFIG_CAVIUM_RESERVE32
+	/*
+	 * We need to temporarily allocate all memory in the reserve32
+	 * region. This makes sure the kernel doesn't allocate this
+	 * memory when it is getting memory from the
+	 * bootloader. Later, after the memory allocations are
+	 * complete, the reserve32 will be freed.
+	 *
+	 * Allocate memory for RESERVED32 aligned on 2MB boundary. This
+	 * is in case we later use hugetlb entries with it.
+	 */
+	addr = cvmx_bootmem_phy_named_block_alloc(CONFIG_CAVIUM_RESERVE32 << 20,
+						0, 0, 2 << 20,
+						"CAVIUM_RESERVE32", 0);
+	if (addr < 0)
+		pr_err("Failed to allocate CAVIUM_RESERVE32 memory area\n");
+	else
+		octeon_reserve32_memory = addr;
+#endif
 
 #ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2
 	if (cvmx_read_csr(CVMX_L2D_FUS3) & (3ull << 34)) {
@@ -1053,6 +1079,16 @@ void __init plat_mem_setup(void)
 	cvmx_bootmem_unlock();
 #endif /* CONFIG_CRASH_DUMP */
 
+#ifdef CONFIG_CAVIUM_RESERVE32
+	/*
+	 * Now that we've allocated the kernel memory it is safe to
+	 * free the reserved region. We free it here so that builtin
+	 * drivers can use the memory.
+	 */
+	if (octeon_reserve32_memory)
+		cvmx_bootmem_free_named("CAVIUM_RESERVE32");
+#endif /* CONFIG_CAVIUM_RESERVE32 */
+
 	if (total == 0)
 		panic("Unable to allocate memory from "
 		      "cvmx_bootmem_phy_alloc");