New upstream version 17.11-rc3

Change-Id: I6a5baa40612fe0c20f30b5fa773a6cbbac63a685
Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>

1 files changed, 550 insertions, 0 deletions

diff --git a/drivers/bus/dpaa/base/qbman/bman.h b/drivers/bus/dpaa/base/qbman/bman.h
new file mode 100644
index 00000000..4b088da9
--- /dev/null
+++ b/drivers/bus/dpaa/base/qbman/bman.h
@@ -0,0 +1,550 @@
+/*-
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ *   BSD LICENSE
+ *
+ * Copyright 2010-2016 Freescale Semiconductor Inc.
+ * Copyright 2017 NXP.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * 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.
+ * * Neither the name of the above-listed copyright holders nor the
+ * names of any contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ *   GPL LICENSE SUMMARY
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * 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 HOLDERS 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.
+ */
+
+#ifndef __BMAN_H
+#define __BMAN_H
+
+#include "bman_priv.h"
+
+/* Cache-inhibited register offsets */
+#define BM_REG_RCR_PI_CINH	0x3000
+#define BM_REG_RCR_CI_CINH	0x3100
+#define BM_REG_RCR_ITR		0x3200
+#define BM_REG_CFG		0x3300
+#define BM_REG_SCN(n)		(0x3400 + ((n) << 6))
+#define BM_REG_ISR		0x3e00
+#define BM_REG_IIR              0x3ec0
+
+/* Cache-enabled register offsets */
+#define BM_CL_CR		0x0000
+#define BM_CL_RR0		0x0100
+#define BM_CL_RR1		0x0140
+#define BM_CL_RCR		0x1000
+#define BM_CL_RCR_PI_CENA	0x3000
+#define BM_CL_RCR_CI_CENA	0x3100
+
+/* BTW, the drivers (and h/w programming model) already obtain the required
+ * synchronisation for portal accesses via lwsync(), hwsync(), and
+ * data-dependencies. Use of barrier()s or other order-preserving primitives
+ * simply degrade performance. Hence the use of the __raw_*() interfaces, which
+ * simply ensure that the compiler treats the portal registers as volatile (ie.
+ * non-coherent).
+ */
+
+/* Cache-inhibited register access. */
+#define __bm_in(bm, o)		be32_to_cpu(__raw_readl((bm)->ci + (o)))
+#define __bm_out(bm, o, val)    __raw_writel(cpu_to_be32(val), \
+					     (bm)->ci + (o))
+#define bm_in(reg)		__bm_in(&portal->addr, BM_REG_##reg)
+#define bm_out(reg, val)	__bm_out(&portal->addr, BM_REG_##reg, val)
+
+/* Cache-enabled (index) register access */
+#define __bm_cl_touch_ro(bm, o) dcbt_ro((bm)->ce + (o))
+#define __bm_cl_touch_rw(bm, o) dcbt_rw((bm)->ce + (o))
+#define __bm_cl_in(bm, o)	be32_to_cpu(__raw_readl((bm)->ce + (o)))
+#define __bm_cl_out(bm, o, val) \
+	do { \
+		u32 *__tmpclout = (bm)->ce + (o); \
+		__raw_writel(cpu_to_be32(val), __tmpclout); \
+		dcbf(__tmpclout); \
+	} while (0)
+#define __bm_cl_invalidate(bm, o) dccivac((bm)->ce + (o))
+#define bm_cl_touch_ro(reg) __bm_cl_touch_ro(&portal->addr, BM_CL_##reg##_CENA)
+#define bm_cl_touch_rw(reg) __bm_cl_touch_rw(&portal->addr, BM_CL_##reg##_CENA)
+#define bm_cl_in(reg)	    __bm_cl_in(&portal->addr, BM_CL_##reg##_CENA)
+#define bm_cl_out(reg, val) __bm_cl_out(&portal->addr, BM_CL_##reg##_CENA, val)
+#define bm_cl_invalidate(reg)\
+	__bm_cl_invalidate(&portal->addr, BM_CL_##reg##_CENA)
+
+/* Cyclic helper for rings. FIXME: once we are able to do fine-grain perf
+ * analysis, look at using the "extra" bit in the ring index registers to avoid
+ * cyclic issues.
+ */
+static inline u8 bm_cyc_diff(u8 ringsize, u8 first, u8 last)
+{
+	/* 'first' is included, 'last' is excluded */
+	if (first <= last)
+		return last - first;
+	return ringsize + last - first;
+}
+
+/* Portal modes.
+ *   Enum types;
+ *     pmode == production mode
+ *     cmode == consumption mode,
+ *   Enum values use 3 letter codes. First letter matches the portal mode,
+ *   remaining two letters indicate;
+ *     ci == cache-inhibited portal register
+ *     ce == cache-enabled portal register
+ *     vb == in-band valid-bit (cache-enabled)
+ */
+enum bm_rcr_pmode {		/* matches BCSP_CFG::RPM */
+	bm_rcr_pci = 0,		/* PI index, cache-inhibited */
+	bm_rcr_pce = 1,		/* PI index, cache-enabled */
+	bm_rcr_pvb = 2		/* valid-bit */
+};
+
+enum bm_rcr_cmode {		/* s/w-only */
+	bm_rcr_cci,		/* CI index, cache-inhibited */
+	bm_rcr_cce		/* CI index, cache-enabled */
+};
+
+/* --- Portal structures --- */
+
+#define BM_RCR_SIZE		8
+
+struct bm_rcr {
+	struct bm_rcr_entry *ring, *cursor;
+	u8 ci, available, ithresh, vbit;
+#ifdef RTE_LIBRTE_DPAA_HWDEBUG
+	u32 busy;
+	enum bm_rcr_pmode pmode;
+	enum bm_rcr_cmode cmode;
+#endif
+};
+
+struct bm_mc {
+	struct bm_mc_command *cr;
+	struct bm_mc_result *rr;
+	u8 rridx, vbit;
+#ifdef RTE_LIBRTE_DPAA_HWDEBUG
+	enum {
+		/* Can only be _mc_start()ed */
+		mc_idle,
+		/* Can only be _mc_commit()ed or _mc_abort()ed */
+		mc_user,
+		/* Can only be _mc_retry()ed */
+		mc_hw
+	} state;
+#endif
+};
+
+struct bm_addr {
+	void __iomem *ce;	/* cache-enabled */
+	void __iomem *ci;	/* cache-inhibited */
+};
+
+struct bm_portal {
+	struct bm_addr addr;
+	struct bm_rcr rcr;
+	struct bm_mc mc;
+	struct bm_portal_config config;
+} ____cacheline_aligned;
+
+/* Bit-wise logic to wrap a ring pointer by clearing the "carry bit" */
+#define RCR_CARRYCLEAR(p) \
+	(void *)((unsigned long)(p) & (~(unsigned long)(BM_RCR_SIZE << 6)))
+
+/* Bit-wise logic to convert a ring pointer to a ring index */
+static inline u8 RCR_PTR2IDX(struct bm_rcr_entry *e)
+{
+	return ((uintptr_t)e >> 6) & (BM_RCR_SIZE - 1);
+}
+
+/* Increment the 'cursor' ring pointer, taking 'vbit' into account */
+static inline void RCR_INC(struct bm_rcr *rcr)
+{
+	/* NB: this is odd-looking, but experiments show that it generates
+	 * fast code with essentially no branching overheads. We increment to
+	 * the next RCR pointer and handle overflow and 'vbit'.
+	 */
+	struct bm_rcr_entry *partial = rcr->cursor + 1;
+
+	rcr->cursor = RCR_CARRYCLEAR(partial);
+	if (partial != rcr->cursor)
+		rcr->vbit ^= BM_RCR_VERB_VBIT;
+}
+
+static inline int bm_rcr_init(struct bm_portal *portal, enum bm_rcr_pmode pmode,
+			      __maybe_unused enum bm_rcr_cmode cmode)
+{
+	/* This use of 'register', as well as all other occurrences, is because
+	 * it has been observed to generate much faster code with gcc than is
+	 * otherwise the case.
+	 */
+	register struct bm_rcr *rcr = &portal->rcr;
+	u32 cfg;
+	u8 pi;
+
+	rcr->ring = portal->addr.ce + BM_CL_RCR;
+	rcr->ci = bm_in(RCR_CI_CINH) & (BM_RCR_SIZE - 1);
+
+	pi = bm_in(RCR_PI_CINH) & (BM_RCR_SIZE - 1);
+	rcr->cursor = rcr->ring + pi;
+	rcr->vbit = (bm_in(RCR_PI_CINH) & BM_RCR_SIZE) ?  BM_RCR_VERB_VBIT : 0;
+	rcr->available = BM_RCR_SIZE - 1
+		- bm_cyc_diff(BM_RCR_SIZE, rcr->ci, pi);
+	rcr->ithresh = bm_in(RCR_ITR);
+#ifdef RTE_LIBRTE_DPAA_HWDEBUG
+	rcr->busy = 0;
+	rcr->pmode = pmode;
+	rcr->cmode = cmode;
+#endif
+	cfg = (bm_in(CFG) & 0xffffffe0) | (pmode & 0x3); /* BCSP_CFG::RPM */
+	bm_out(CFG, cfg);
+	return 0;
+}
+
+static inline void bm_rcr_finish(struct bm_portal *portal)
+{
+	register struct bm_rcr *rcr = &portal->rcr;
+	u8 pi = bm_in(RCR_PI_CINH) & (BM_RCR_SIZE - 1);
+	u8 ci = bm_in(RCR_CI_CINH) & (BM_RCR_SIZE - 1);
+
+	DPAA_ASSERT(!rcr->busy);
+	if (pi != RCR_PTR2IDX(rcr->cursor))
+		pr_crit("losing uncommitted RCR entries\n");
+	if (ci != rcr->ci)
+		pr_crit("missing existing RCR completions\n");
+	if (rcr->ci != RCR_PTR2IDX(rcr->cursor))
+		pr_crit("RCR destroyed unquiesced\n");
+}
+
+static inline struct bm_rcr_entry *bm_rcr_start(struct bm_portal *portal)
+{
+	register struct bm_rcr *rcr = &portal->rcr;
+
+	DPAA_ASSERT(!rcr->busy);
+	if (!rcr->available)
+		return NULL;
+#ifdef RTE_LIBRTE_DPAA_HWDEBUG
+	rcr->busy = 1;
+#endif
+	dcbz_64(rcr->cursor);
+	return rcr->cursor;
+}
+
+static inline void bm_rcr_abort(struct bm_portal *portal)
+{
+	__maybe_unused register struct bm_rcr *rcr = &portal->rcr;
+
+	DPAA_ASSERT(rcr->busy);
+#ifdef RTE_LIBRTE_DPAA_HWDEBUG
+	rcr->busy = 0;
+#endif
+}
+
+static inline struct bm_rcr_entry *bm_rcr_pend_and_next(
+					struct bm_portal *portal, u8 myverb)
+{
+	register struct bm_rcr *rcr = &portal->rcr;
+
+	DPAA_ASSERT(rcr->busy);
+	DPAA_ASSERT(rcr->pmode != bm_rcr_pvb);
+	if (rcr->available == 1)
+		return NULL;
+	rcr->cursor->__dont_write_directly__verb = myverb | rcr->vbit;
+	dcbf_64(rcr->cursor);
+	RCR_INC(rcr);
+	rcr->available--;
+	dcbz_64(rcr->cursor);
+	return rcr->cursor;
+}
+
+static inline void bm_rcr_pci_commit(struct bm_portal *portal, u8 myverb)
+{
+	register struct bm_rcr *rcr = &portal->rcr;
+
+	DPAA_ASSERT(rcr->busy);
+	DPAA_ASSERT(rcr->pmode == bm_rcr_pci);
+	rcr->cursor->__dont_write_directly__verb = myverb | rcr->vbit;
+	RCR_INC(rcr);
+	rcr->available--;
+	hwsync();
+	bm_out(RCR_PI_CINH, RCR_PTR2IDX(rcr->cursor));
+#ifdef RTE_LIBRTE_DPAA_HWDEBUG
+	rcr->busy = 0;
+#endif
+}
+
+static inline void bm_rcr_pce_prefetch(struct bm_portal *portal)
+{
+	__maybe_unused register struct bm_rcr *rcr = &portal->rcr;
+
+	DPAA_ASSERT(rcr->pmode == bm_rcr_pce);
+	bm_cl_invalidate(RCR_PI);
+	bm_cl_touch_rw(RCR_PI);
+}
+
+static inline void bm_rcr_pce_commit(struct bm_portal *portal, u8 myverb)
+{
+	register struct bm_rcr *rcr = &portal->rcr;
+
+	DPAA_ASSERT(rcr->busy);
+	DPAA_ASSERT(rcr->pmode == bm_rcr_pce);
+	rcr->cursor->__dont_write_directly__verb = myverb | rcr->vbit;
+	RCR_INC(rcr);
+	rcr->available--;
+	lwsync();
+	bm_cl_out(RCR_PI, RCR_PTR2IDX(rcr->cursor));
+#ifdef RTE_LIBRTE_DPAA_HWDEBUG
+	rcr->busy = 0;
+#endif
+}
+
+static inline void bm_rcr_pvb_commit(struct bm_portal *portal, u8 myverb)
+{
+	register struct bm_rcr *rcr = &portal->rcr;
+	struct bm_rcr_entry *rcursor;
+
+	DPAA_ASSERT(rcr->busy);
+	DPAA_ASSERT(rcr->pmode == bm_rcr_pvb);
+	lwsync();
+	rcursor = rcr->cursor;
+	rcursor->__dont_write_directly__verb = myverb | rcr->vbit;
+	dcbf_64(rcursor);
+	RCR_INC(rcr);
+	rcr->available--;
+#ifdef RTE_LIBRTE_DPAA_HWDEBUG
+	rcr->busy = 0;
+#endif
+}
+
+static inline u8 bm_rcr_cci_update(struct bm_portal *portal)
+{
+	register struct bm_rcr *rcr = &portal->rcr;
+	u8 diff, old_ci = rcr->ci;
+
+	DPAA_ASSERT(rcr->cmode == bm_rcr_cci);
+	rcr->ci = bm_in(RCR_CI_CINH) & (BM_RCR_SIZE - 1);
+	diff = bm_cyc_diff(BM_RCR_SIZE, old_ci, rcr->ci);
+	rcr->available += diff;
+	return diff;
+}
+
+static inline void bm_rcr_cce_prefetch(struct bm_portal *portal)
+{
+	__maybe_unused register struct bm_rcr *rcr = &portal->rcr;
+
+	DPAA_ASSERT(rcr->cmode == bm_rcr_cce);
+	bm_cl_touch_ro(RCR_CI);
+}
+
+static inline u8 bm_rcr_cce_update(struct bm_portal *portal)
+{
+	register struct bm_rcr *rcr = &portal->rcr;
+	u8 diff, old_ci = rcr->ci;
+
+	DPAA_ASSERT(rcr->cmode == bm_rcr_cce);
+	rcr->ci = bm_cl_in(RCR_CI) & (BM_RCR_SIZE - 1);
+	bm_cl_invalidate(RCR_CI);
+	diff = bm_cyc_diff(BM_RCR_SIZE, old_ci, rcr->ci);
+	rcr->available += diff;
+	return diff;
+}
+
+static inline u8 bm_rcr_get_ithresh(struct bm_portal *portal)
+{
+	register struct bm_rcr *rcr = &portal->rcr;
+
+	return rcr->ithresh;
+}
+
+static inline void bm_rcr_set_ithresh(struct bm_portal *portal, u8 ithresh)
+{
+	register struct bm_rcr *rcr = &portal->rcr;
+
+	rcr->ithresh = ithresh;
+	bm_out(RCR_ITR, ithresh);
+}
+
+static inline u8 bm_rcr_get_avail(struct bm_portal *portal)
+{
+	register struct bm_rcr *rcr = &portal->rcr;
+
+	return rcr->available;
+}
+
+static inline u8 bm_rcr_get_fill(struct bm_portal *portal)
+{
+	register struct bm_rcr *rcr = &portal->rcr;
+
+	return BM_RCR_SIZE - 1 - rcr->available;
+}
+
+/* --- Management command API --- */
+
+static inline int bm_mc_init(struct bm_portal *portal)
+{
+	register struct bm_mc *mc = &portal->mc;
+
+	mc->cr = portal->addr.ce + BM_CL_CR;
+	mc->rr = portal->addr.ce + BM_CL_RR0;
+	mc->rridx = (__raw_readb(&mc->cr->__dont_write_directly__verb) &
+			BM_MCC_VERB_VBIT) ?  0 : 1;
+	mc->vbit = mc->rridx ? BM_MCC_VERB_VBIT : 0;
+#ifdef RTE_LIBRTE_DPAA_HWDEBUG
+	mc->state = mc_idle;
+#endif
+	return 0;
+}
+
+static inline void bm_mc_finish(struct bm_portal *portal)
+{
+	__maybe_unused register struct bm_mc *mc = &portal->mc;
+
+	DPAA_ASSERT(mc->state == mc_idle);
+#ifdef RTE_LIBRTE_DPAA_HWDEBUG
+	if (mc->state != mc_idle)
+		pr_crit("Losing incomplete MC command\n");
+#endif
+}
+
+static inline struct bm_mc_command *bm_mc_start(struct bm_portal *portal)
+{
+	register struct bm_mc *mc = &portal->mc;
+
+	DPAA_ASSERT(mc->state == mc_idle);
+#ifdef RTE_LIBRTE_DPAA_HWDEBUG
+	mc->state = mc_user;
+#endif
+	dcbz_64(mc->cr);
+	return mc->cr;
+}
+
+static inline void bm_mc_abort(struct bm_portal *portal)
+{
+	__maybe_unused register struct bm_mc *mc = &portal->mc;
+
+	DPAA_ASSERT(mc->state == mc_user);
+#ifdef RTE_LIBRTE_DPAA_HWDEBUG
+	mc->state = mc_idle;
+#endif
+}
+
+static inline void bm_mc_commit(struct bm_portal *portal, u8 myverb)
+{
+	register struct bm_mc *mc = &portal->mc;
+	struct bm_mc_result *rr = mc->rr + mc->rridx;
+
+	DPAA_ASSERT(mc->state == mc_user);
+	lwsync();
+	mc->cr->__dont_write_directly__verb = myverb | mc->vbit;
+	dcbf(mc->cr);
+	dcbit_ro(rr);
+#ifdef RTE_LIBRTE_DPAA_HWDEBUG
+	mc->state = mc_hw;
+#endif
+}
+
+static inline struct bm_mc_result *bm_mc_result(struct bm_portal *portal)
+{
+	register struct bm_mc *mc = &portal->mc;
+	struct bm_mc_result *rr = mc->rr + mc->rridx;
+
+	DPAA_ASSERT(mc->state == mc_hw);
+	/* The inactive response register's verb byte always returns zero until
+	 * its command is submitted and completed. This includes the valid-bit,
+	 * in case you were wondering.
+	 */
+	if (!__raw_readb(&rr->verb)) {
+		dcbit_ro(rr);
+		return NULL;
+	}
+	mc->rridx ^= 1;
+	mc->vbit ^= BM_MCC_VERB_VBIT;
+#ifdef RTE_LIBRTE_DPAA_HWDEBUG
+	mc->state = mc_idle;
+#endif
+	return rr;
+}
+
+#define SCN_REG(bpid) BM_REG_SCN((bpid) / 32)
+#define SCN_BIT(bpid) (0x80000000 >> (bpid & 31))
+static inline void bm_isr_bscn_mask(struct bm_portal *portal, u8 bpid,
+				    int enable)
+{
+	u32 val;
+
+	DPAA_ASSERT(bpid < bman_pool_max);
+	/* REG_SCN for bpid=0..31, REG_SCN+4 for bpid=32..63 */
+	val = __bm_in(&portal->addr, SCN_REG(bpid));
+	if (enable)
+		val |= SCN_BIT(bpid);
+	else
+		val &= ~SCN_BIT(bpid);
+	__bm_out(&portal->addr, SCN_REG(bpid), val);
+}
+
+static inline u32 __bm_isr_read(struct bm_portal *portal, enum bm_isr_reg n)
+{
+#if defined(RTE_ARCH_ARM64)
+	return __bm_in(&portal->addr, BM_REG_ISR + (n << 6));
+#else
+	return __bm_in(&portal->addr, BM_REG_ISR + (n << 2));
+#endif
+}
+
+static inline void __bm_isr_write(struct bm_portal *portal, enum bm_isr_reg n,
+				  u32 val)
+{
+#if defined(RTE_ARCH_ARM64)
+	__bm_out(&portal->addr, BM_REG_ISR + (n << 6), val);
+#else
+	__bm_out(&portal->addr, BM_REG_ISR + (n << 2), val);
+#endif
+}
+
+/* Buffer Pool Cleanup */
+static inline int bm_shutdown_pool(struct bm_portal *p, u32 bpid)
+{
+	struct bm_mc_command *bm_cmd;
+	struct bm_mc_result *bm_res;
+
+	int aq_count = 0;
+	bool stop = false;
+
+	while (!stop) {
+		/* Acquire buffers until empty */
+		bm_cmd = bm_mc_start(p);
+		bm_cmd->acquire.bpid = bpid;
+		bm_mc_commit(p, BM_MCC_VERB_CMD_ACQUIRE |  1);
+		while (!(bm_res = bm_mc_result(p)))
+			cpu_relax();
+		if (!(bm_res->verb & BM_MCR_VERB_ACQUIRE_BUFCOUNT)) {
+			/* Pool is empty */
+			stop = true;
+		} else
+			++aq_count;
+	};
+	return 0;
+}
+
+#endif /* __BMAN_H */