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authorDavid Daney <ddaney@caviumnetworks.com>2009-05-05 17:35:21 -0700
committerRalf Baechle <ralf@linux-mips.org>2009-06-17 11:06:30 +0100
commit80ff0fd3ab6451407a20c19b80c1643c4a6d6434 (patch)
tree2d7021ac34269f0bce3ac18f7347bf6946640f36 /drivers/staging/octeon/cvmx-helper-fpa.c
parent38295fb2a09264671c82d490ce77c17d492378e0 (diff)
Staging: Add octeon-ethernet driver files.
The octeon-ethernet driver supports the sgmii, rgmii, spi, and xaui ports present on the Cavium OCTEON family of SOCs. These SOCs are multi-core mips64 processors with existing support over in arch/mips. The driver files can be categorized into three basic groups: 1) Register definitions, these are named cvmx-*-defs.h 2) Main driver code, these have names that don't start cvmx-. 3) Interface specific functions and other utility code, names starting with cvmx- Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'drivers/staging/octeon/cvmx-helper-fpa.c')
-rw-r--r--drivers/staging/octeon/cvmx-helper-fpa.c243
1 files changed, 243 insertions, 0 deletions
diff --git a/drivers/staging/octeon/cvmx-helper-fpa.c b/drivers/staging/octeon/cvmx-helper-fpa.c
new file mode 100644
index 00000000000..c239e5f4ab9
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+++ b/drivers/staging/octeon/cvmx-helper-fpa.c
@@ -0,0 +1,243 @@
+/***********************license start***************
+ * Author: Cavium Networks
+ *
+ * Contact: support@caviumnetworks.com
+ * This file is part of the OCTEON SDK
+ *
+ * Copyright (c) 2003-2008 Cavium Networks
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, Version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This file is distributed in the hope that it will be useful, but
+ * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
+ * NONINFRINGEMENT. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this file; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * or visit http://www.gnu.org/licenses/.
+ *
+ * This file may also be available under a different license from Cavium.
+ * Contact Cavium Networks for more information
+ ***********************license end**************************************/
+
+/**
+ * @file
+ *
+ * Helper functions for FPA setup.
+ *
+ */
+#include "executive-config.h"
+#include "cvmx-config.h"
+#include "cvmx.h"
+#include "cvmx-bootmem.h"
+#include "cvmx-fpa.h"
+#include "cvmx-helper-fpa.h"
+
+/**
+ * Allocate memory for and initialize a single FPA pool.
+ *
+ * @pool: Pool to initialize
+ * @buffer_size: Size of buffers to allocate in bytes
+ * @buffers: Number of buffers to put in the pool. Zero is allowed
+ * @name: String name of the pool for debugging purposes
+ * Returns Zero on success, non-zero on failure
+ */
+static int __cvmx_helper_initialize_fpa_pool(int pool, uint64_t buffer_size,
+ uint64_t buffers, const char *name)
+{
+ uint64_t current_num;
+ void *memory;
+ uint64_t align = CVMX_CACHE_LINE_SIZE;
+
+ /*
+ * Align the allocation so that power of 2 size buffers are
+ * naturally aligned.
+ */
+ while (align < buffer_size)
+ align = align << 1;
+
+ if (buffers == 0)
+ return 0;
+
+ current_num = cvmx_read_csr(CVMX_FPA_QUEX_AVAILABLE(pool));
+ if (current_num) {
+ cvmx_dprintf("Fpa pool %d(%s) already has %llu buffers. "
+ "Skipping setup.\n",
+ pool, name, (unsigned long long)current_num);
+ return 0;
+ }
+
+ memory = cvmx_bootmem_alloc(buffer_size * buffers, align);
+ if (memory == NULL) {
+ cvmx_dprintf("Out of memory initializing fpa pool %d(%s).\n",
+ pool, name);
+ return -1;
+ }
+ cvmx_fpa_setup_pool(pool, name, memory, buffer_size, buffers);
+ return 0;
+}
+
+/**
+ * Allocate memory and initialize the FPA pools using memory
+ * from cvmx-bootmem. Specifying zero for the number of
+ * buffers will cause that FPA pool to not be setup. This is
+ * useful if you aren't using some of the hardware and want
+ * to save memory. Use cvmx_helper_initialize_fpa instead of
+ * this function directly.
+ *
+ * @pip_pool: Should always be CVMX_FPA_PACKET_POOL
+ * @pip_size: Should always be CVMX_FPA_PACKET_POOL_SIZE
+ * @pip_buffers:
+ * Number of packet buffers.
+ * @wqe_pool: Should always be CVMX_FPA_WQE_POOL
+ * @wqe_size: Should always be CVMX_FPA_WQE_POOL_SIZE
+ * @wqe_entries:
+ * Number of work queue entries
+ * @pko_pool: Should always be CVMX_FPA_OUTPUT_BUFFER_POOL
+ * @pko_size: Should always be CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE
+ * @pko_buffers:
+ * PKO Command buffers. You should at minimum have two per
+ * each PKO queue.
+ * @tim_pool: Should always be CVMX_FPA_TIMER_POOL
+ * @tim_size: Should always be CVMX_FPA_TIMER_POOL_SIZE
+ * @tim_buffers:
+ * TIM ring buffer command queues. At least two per timer bucket
+ * is recommened.
+ * @dfa_pool: Should always be CVMX_FPA_DFA_POOL
+ * @dfa_size: Should always be CVMX_FPA_DFA_POOL_SIZE
+ * @dfa_buffers:
+ * DFA command buffer. A relatively small (32 for example)
+ * number should work.
+ * Returns Zero on success, non-zero if out of memory
+ */
+static int __cvmx_helper_initialize_fpa(int pip_pool, int pip_size,
+ int pip_buffers, int wqe_pool,
+ int wqe_size, int wqe_entries,
+ int pko_pool, int pko_size,
+ int pko_buffers, int tim_pool,
+ int tim_size, int tim_buffers,
+ int dfa_pool, int dfa_size,
+ int dfa_buffers)
+{
+ int status;
+
+ cvmx_fpa_enable();
+
+ if ((pip_buffers > 0) && (pip_buffers <= 64))
+ cvmx_dprintf
+ ("Warning: %d packet buffers may not be enough for hardware"
+ " prefetch. 65 or more is recommended.\n", pip_buffers);
+
+ if (pip_pool >= 0) {
+ status =
+ __cvmx_helper_initialize_fpa_pool(pip_pool, pip_size,
+ pip_buffers,
+ "Packet Buffers");
+ if (status)
+ return status;
+ }
+
+ if (wqe_pool >= 0) {
+ status =
+ __cvmx_helper_initialize_fpa_pool(wqe_pool, wqe_size,
+ wqe_entries,
+ "Work Queue Entries");
+ if (status)
+ return status;
+ }
+
+ if (pko_pool >= 0) {
+ status =
+ __cvmx_helper_initialize_fpa_pool(pko_pool, pko_size,
+ pko_buffers,
+ "PKO Command Buffers");
+ if (status)
+ return status;
+ }
+
+ if (tim_pool >= 0) {
+ status =
+ __cvmx_helper_initialize_fpa_pool(tim_pool, tim_size,
+ tim_buffers,
+ "TIM Command Buffers");
+ if (status)
+ return status;
+ }
+
+ if (dfa_pool >= 0) {
+ status =
+ __cvmx_helper_initialize_fpa_pool(dfa_pool, dfa_size,
+ dfa_buffers,
+ "DFA Command Buffers");
+ if (status)
+ return status;
+ }
+
+ return 0;
+}
+
+/**
+ * Allocate memory and initialize the FPA pools using memory
+ * from cvmx-bootmem. Sizes of each element in the pools is
+ * controlled by the cvmx-config.h header file. Specifying
+ * zero for any parameter will cause that FPA pool to not be
+ * setup. This is useful if you aren't using some of the
+ * hardware and want to save memory.
+ *
+ * @packet_buffers:
+ * Number of packet buffers to allocate
+ * @work_queue_entries:
+ * Number of work queue entries
+ * @pko_buffers:
+ * PKO Command buffers. You should at minimum have two per
+ * each PKO queue.
+ * @tim_buffers:
+ * TIM ring buffer command queues. At least two per timer bucket
+ * is recommened.
+ * @dfa_buffers:
+ * DFA command buffer. A relatively small (32 for example)
+ * number should work.
+ * Returns Zero on success, non-zero if out of memory
+ */
+int cvmx_helper_initialize_fpa(int packet_buffers, int work_queue_entries,
+ int pko_buffers, int tim_buffers,
+ int dfa_buffers)
+{
+#ifndef CVMX_FPA_PACKET_POOL
+#define CVMX_FPA_PACKET_POOL -1
+#define CVMX_FPA_PACKET_POOL_SIZE 0
+#endif
+#ifndef CVMX_FPA_WQE_POOL
+#define CVMX_FPA_WQE_POOL -1
+#define CVMX_FPA_WQE_POOL_SIZE 0
+#endif
+#ifndef CVMX_FPA_OUTPUT_BUFFER_POOL
+#define CVMX_FPA_OUTPUT_BUFFER_POOL -1
+#define CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE 0
+#endif
+#ifndef CVMX_FPA_TIMER_POOL
+#define CVMX_FPA_TIMER_POOL -1
+#define CVMX_FPA_TIMER_POOL_SIZE 0
+#endif
+#ifndef CVMX_FPA_DFA_POOL
+#define CVMX_FPA_DFA_POOL -1
+#define CVMX_FPA_DFA_POOL_SIZE 0
+#endif
+ return __cvmx_helper_initialize_fpa(CVMX_FPA_PACKET_POOL,
+ CVMX_FPA_PACKET_POOL_SIZE,
+ packet_buffers, CVMX_FPA_WQE_POOL,
+ CVMX_FPA_WQE_POOL_SIZE,
+ work_queue_entries,
+ CVMX_FPA_OUTPUT_BUFFER_POOL,
+ CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE,
+ pko_buffers, CVMX_FPA_TIMER_POOL,
+ CVMX_FPA_TIMER_POOL_SIZE,
+ tim_buffers, CVMX_FPA_DFA_POOL,
+ CVMX_FPA_DFA_POOL_SIZE,
+ dfa_buffers);
+}