Imported Upstream version 17.05

Change-Id: Id1e419c5a214e4a18739663b91f0f9a549f1fdc6
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>

1 files changed, 331 insertions, 0 deletions

diff --git a/drivers/net/sfc/base/efx_sram.c b/drivers/net/sfc/base/efx_sram.c
new file mode 100644
index 00000000..5f4edea7
--- /dev/null
+++ b/drivers/net/sfc/base/efx_sram.c
@@ -0,0 +1,331 @@
+/*
+ * Copyright (c) 2007-2016 Solarflare Communications Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are
+ * those of the authors and should not be interpreted as representing official
+ * policies, either expressed or implied, of the FreeBSD Project.
+ */
+
+#include "efx.h"
+#include "efx_impl.h"
+
+	__checkReturn	efx_rc_t
+efx_sram_buf_tbl_set(
+	__in		efx_nic_t *enp,
+	__in		uint32_t id,
+	__in		efsys_mem_t *esmp,
+	__in		size_t n)
+{
+	efx_qword_t qword;
+	uint32_t start = id;
+	uint32_t stop = start + n;
+	efsys_dma_addr_t addr;
+	efx_oword_t oword;
+	unsigned int count;
+	efx_rc_t rc;
+
+	EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
+	EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_NIC);
+
+#if EFSYS_OPT_HUNTINGTON || EFSYS_OPT_MEDFORD
+	if (enp->en_family == EFX_FAMILY_HUNTINGTON ||
+	    enp->en_family == EFX_FAMILY_MEDFORD) {
+		/*
+		 * FIXME: the efx_sram_buf_tbl_*() functionality needs to be
+		 * pulled inside the Falcon/Siena queue create/destroy code,
+		 * and then the original functions can be removed (see bug30834
+		 * comment #1).  But, for now, we just ensure that they are
+		 * no-ops for EF10, to allow bringing up existing drivers
+		 * without modification.
+		 */
+
+		return (0);
+	}
+#endif	/* EFSYS_OPT_HUNTINGTON || EFSYS_OPT_MEDFORD */
+
+	if (stop >= EFX_BUF_TBL_SIZE) {
+		rc = EFBIG;
+		goto fail1;
+	}
+
+	/* Add the entries into the buffer table */
+	addr = EFSYS_MEM_ADDR(esmp);
+	for (id = start; id != stop; id++) {
+		EFX_POPULATE_QWORD_5(qword,
+		    FRF_AZ_IP_DAT_BUF_SIZE, 0, FRF_AZ_BUF_ADR_REGION, 0,
+		    FRF_AZ_BUF_ADR_FBUF_DW0,
+		    (uint32_t)((addr >> 12) & 0xffffffff),
+		    FRF_AZ_BUF_ADR_FBUF_DW1,
+		    (uint32_t)((addr >> 12) >> 32),
+		    FRF_AZ_BUF_OWNER_ID_FBUF, 0);
+
+		EFX_BAR_TBL_WRITEQ(enp, FR_AZ_BUF_FULL_TBL,
+				    id, &qword);
+
+		addr += EFX_BUF_SIZE;
+	}
+
+	EFSYS_PROBE2(buf, uint32_t, start, uint32_t, stop - 1);
+
+	/* Flush the write buffer */
+	EFX_POPULATE_OWORD_2(oword, FRF_AZ_BUF_UPD_CMD, 1,
+	    FRF_AZ_BUF_CLR_CMD, 0);
+	EFX_BAR_WRITEO(enp, FR_AZ_BUF_TBL_UPD_REG, &oword);
+
+	/* Poll for the last entry being written to the buffer table */
+	EFSYS_ASSERT3U(id, ==, stop);
+	addr -= EFX_BUF_SIZE;
+
+	count = 0;
+	do {
+		EFSYS_PROBE1(wait, unsigned int, count);
+
+		/* Spin for 1 ms */
+		EFSYS_SPIN(1000);
+
+		EFX_BAR_TBL_READQ(enp, FR_AZ_BUF_FULL_TBL,
+				    id - 1, &qword);
+
+		if (EFX_QWORD_FIELD(qword, FRF_AZ_BUF_ADR_FBUF_DW0) ==
+		    (uint32_t)((addr >> 12) & 0xffffffff) &&
+		    EFX_QWORD_FIELD(qword, FRF_AZ_BUF_ADR_FBUF_DW1) ==
+		    (uint32_t)((addr >> 12) >> 32))
+			goto verify;
+
+	} while (++count < 100);
+
+	rc = ETIMEDOUT;
+	goto fail2;
+
+verify:
+	/* Verify the rest of the entries in the buffer table */
+	while (--id != start) {
+		addr -= EFX_BUF_SIZE;
+
+		/* Read the buffer table entry */
+		EFX_BAR_TBL_READQ(enp, FR_AZ_BUF_FULL_TBL,
+				    id - 1, &qword);
+
+		if (EFX_QWORD_FIELD(qword, FRF_AZ_BUF_ADR_FBUF_DW0) !=
+		    (uint32_t)((addr >> 12) & 0xffffffff) ||
+		    EFX_QWORD_FIELD(qword, FRF_AZ_BUF_ADR_FBUF_DW1) !=
+		    (uint32_t)((addr >> 12) >> 32)) {
+			rc = EFAULT;
+			goto fail3;
+		}
+	}
+
+	return (0);
+
+fail3:
+	EFSYS_PROBE(fail3);
+
+	id = stop;
+
+fail2:
+	EFSYS_PROBE(fail2);
+
+	EFX_POPULATE_OWORD_4(oword, FRF_AZ_BUF_UPD_CMD, 0,
+	    FRF_AZ_BUF_CLR_CMD, 1, FRF_AZ_BUF_CLR_END_ID, id - 1,
+	    FRF_AZ_BUF_CLR_START_ID, start);
+	EFX_BAR_WRITEO(enp, FR_AZ_BUF_TBL_UPD_REG, &oword);
+
+fail1:
+	EFSYS_PROBE1(fail1, efx_rc_t, rc);
+
+	return (rc);
+}
+
+		void
+efx_sram_buf_tbl_clear(
+	__in	efx_nic_t *enp,
+	__in	uint32_t id,
+	__in	size_t n)
+{
+	efx_oword_t oword;
+	uint32_t start = id;
+	uint32_t stop = start + n;
+
+	EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
+	EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_NIC);
+
+#if EFSYS_OPT_HUNTINGTON || EFSYS_OPT_MEDFORD
+	if (enp->en_family == EFX_FAMILY_HUNTINGTON ||
+	    enp->en_family == EFX_FAMILY_MEDFORD) {
+		/*
+		 * FIXME: the efx_sram_buf_tbl_*() functionality needs to be
+		 * pulled inside the Falcon/Siena queue create/destroy code,
+		 * and then the original functions can be removed (see bug30834
+		 * comment #1).  But, for now, we just ensure that they are
+		 * no-ops for EF10, to allow bringing up existing drivers
+		 * without modification.
+		 */
+
+		return;
+	}
+#endif	/* EFSYS_OPT_HUNTINGTON || EFSYS_OPT_MEDFORD */
+
+	EFSYS_ASSERT3U(stop, <, EFX_BUF_TBL_SIZE);
+
+	EFSYS_PROBE2(buf, uint32_t, start, uint32_t, stop - 1);
+
+	EFX_POPULATE_OWORD_4(oword, FRF_AZ_BUF_UPD_CMD, 0,
+	    FRF_AZ_BUF_CLR_CMD, 1, FRF_AZ_BUF_CLR_END_ID, stop - 1,
+	    FRF_AZ_BUF_CLR_START_ID, start);
+	EFX_BAR_WRITEO(enp, FR_AZ_BUF_TBL_UPD_REG, &oword);
+}
+
+
+#if EFSYS_OPT_DIAG
+
+static			void
+efx_sram_byte_increment_set(
+	__in		size_t row,
+	__in		boolean_t negate,
+	__out		efx_qword_t *eqp)
+{
+	size_t offset = row * FR_AZ_SRM_DBG_REG_STEP;
+	unsigned int index;
+
+	_NOTE(ARGUNUSED(negate))
+
+	for (index = 0; index < sizeof (efx_qword_t); index++)
+		eqp->eq_u8[index] = offset + index;
+}
+
+static			void
+efx_sram_all_the_same_set(
+	__in		size_t row,
+	__in		boolean_t negate,
+	__out		efx_qword_t *eqp)
+{
+	_NOTE(ARGUNUSED(row))
+
+	if (negate)
+		EFX_SET_QWORD(*eqp);
+	else
+		EFX_ZERO_QWORD(*eqp);
+}
+
+static			void
+efx_sram_bit_alternate_set(
+	__in		size_t row,
+	__in		boolean_t negate,
+	__out		efx_qword_t *eqp)
+{
+	_NOTE(ARGUNUSED(row))
+
+	EFX_POPULATE_QWORD_2(*eqp,
+	    EFX_DWORD_0, (negate) ? 0x55555555 : 0xaaaaaaaa,
+	    EFX_DWORD_1, (negate) ? 0x55555555 : 0xaaaaaaaa);
+}
+
+static			void
+efx_sram_byte_alternate_set(
+	__in		size_t row,
+	__in		boolean_t negate,
+	__out		efx_qword_t *eqp)
+{
+	_NOTE(ARGUNUSED(row))
+
+	EFX_POPULATE_QWORD_2(*eqp,
+	    EFX_DWORD_0, (negate) ? 0x00ff00ff : 0xff00ff00,
+	    EFX_DWORD_1, (negate) ? 0x00ff00ff : 0xff00ff00);
+}
+
+static			void
+efx_sram_byte_changing_set(
+	__in		size_t row,
+	__in		boolean_t negate,
+	__out		efx_qword_t *eqp)
+{
+	size_t offset = row * FR_AZ_SRM_DBG_REG_STEP;
+	unsigned int index;
+
+	for (index = 0; index < sizeof (efx_qword_t); index++) {
+		uint8_t byte;
+
+		if (offset / 256 == 0)
+			byte = (uint8_t)((offset % 257) % 256);
+		else
+			byte = (uint8_t)(~((offset - 8) % 257) % 256);
+
+		eqp->eq_u8[index] = (negate) ? ~byte : byte;
+	}
+}
+
+static			void
+efx_sram_bit_sweep_set(
+	__in		size_t row,
+	__in		boolean_t negate,
+	__out		efx_qword_t *eqp)
+{
+	size_t offset = row * FR_AZ_SRM_DBG_REG_STEP;
+
+	if (negate) {
+		EFX_SET_QWORD(*eqp);
+		EFX_CLEAR_QWORD_BIT(*eqp, (offset / sizeof (efx_qword_t)) % 64);
+	} else {
+		EFX_ZERO_QWORD(*eqp);
+		EFX_SET_QWORD_BIT(*eqp, (offset / sizeof (efx_qword_t)) % 64);
+	}
+}
+
+efx_sram_pattern_fn_t	__efx_sram_pattern_fns[] = {
+	efx_sram_byte_increment_set,
+	efx_sram_all_the_same_set,
+	efx_sram_bit_alternate_set,
+	efx_sram_byte_alternate_set,
+	efx_sram_byte_changing_set,
+	efx_sram_bit_sweep_set
+};
+
+	__checkReturn	efx_rc_t
+efx_sram_test(
+	__in		efx_nic_t *enp,
+	__in		efx_pattern_type_t type)
+{
+	efx_sram_pattern_fn_t func;
+
+	EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
+
+	EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_NIC);
+
+	EFSYS_ASSERT(!(enp->en_mod_flags & EFX_MOD_RX));
+	EFSYS_ASSERT(!(enp->en_mod_flags & EFX_MOD_TX));
+	EFSYS_ASSERT(!(enp->en_mod_flags & EFX_MOD_EV));
+
+	/* SRAM testing is only available on Siena. */
+	if (enp->en_family != EFX_FAMILY_SIENA)
+		return (0);
+
+	/* Select pattern generator */
+	EFSYS_ASSERT3U(type, <, EFX_PATTERN_NTYPES);
+	func = __efx_sram_pattern_fns[type];
+
+	return (siena_sram_test(enp, func));
+}
+
+#endif	/* EFSYS_OPT_DIAG */