Merge tag 'powerpc-4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull more powerpc updates from Michael Ellerman:
 "The change to the Linux page table geometry was delayed for more
  testing with 16G pages, and there's the new CPU features stuff which
  just needed one more polish before going in. Plus a few changes from
  Scott which came in a bit late. And then various fixes, mostly minor.

  Summary highlights:

   - rework the Linux page table geometry to lower memory usage on
     64-bit Book3S (IBM chips) using the Hash MMU.

   - support for a new device tree binding for discovering CPU features
     on future firmwares.

   - Freescale updates from Scott:
      "Includes a fix for a powerpc/next mm regression on 64e, a fix for
       a kernel hang on 64e when using a debugger inside a relocated
       kernel, a qman fix, and misc qe improvements."

  Thanks to: Christophe Leroy, Gavin Shan, Horia Geantă, LiuHailong,
  Nicholas Piggin, Roy Pledge, Scott Wood, Valentin Longchamp"

* tag 'powerpc-4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/64s: Support new device tree binding for discovering CPU features
  powerpc: Don't print cpu_spec->cpu_name if it's NULL
  of/fdt: introduce of_scan_flat_dt_subnodes and of_get_flat_dt_phandle
  powerpc/64s: Fix unnecessary machine check handler relocation branch
  powerpc/mm/book3s/64: Rework page table geometry for lower memory usage
  powerpc: Fix distclean with Makefile.postlink
  powerpc/64e: Don't place the stack beyond TASK_SIZE
  powerpc/powernv: Block PCI config access on BCM5718 during EEH recovery
  powerpc/8xx: Adding support of IRQ in MPC8xx GPIO
  soc/fsl/qbman: Disable IRQs for deferred QBMan work
  soc/fsl/qe: add EXPORT_SYMBOL for the 2 qe_tdm functions
  soc/fsl/qe: only apply QE_General4 workaround on affected SoCs
  soc/fsl/qe: round brg_freq to 1kHz granularity
  soc/fsl/qe: get rid of immrbar_virt_to_phys()
  net: ethernet: ucc_geth: fix MEM_PART_MURAM mode
  powerpc/64e: Fix hang when debugging programs with relocated kernel

5 files changed, 68 insertions, 10 deletions

diff --git a/drivers/net/ethernet/freescale/ucc_geth.c b/drivers/net/ethernet/freescale/ucc_geth.c
index 3f7ae9f64cd8..f77ba9fa257b 100644
--- a/drivers/net/ethernet/freescale/ucc_geth.c
+++ b/drivers/net/ethernet/freescale/ucc_geth.c
@@ -2594,11 +2594,10 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
 		} else if (ugeth->ug_info->uf_info.bd_mem_part ==
 			   MEM_PART_MURAM) {
 			out_be32(&ugeth->p_send_q_mem_reg->sqqd[i].bd_ring_base,
-				 (u32) immrbar_virt_to_phys(ugeth->
-							    p_tx_bd_ring[i]));
+				 (u32)qe_muram_dma(ugeth->p_tx_bd_ring[i]));
 			out_be32(&ugeth->p_send_q_mem_reg->sqqd[i].
 				 last_bd_completed_address,
-				 (u32) immrbar_virt_to_phys(endOfRing));
+				 (u32)qe_muram_dma(endOfRing));
 		}
 	}
 
@@ -2844,8 +2843,7 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
 		} else if (ugeth->ug_info->uf_info.bd_mem_part ==
 			   MEM_PART_MURAM) {
 			out_be32(&ugeth->p_rx_bd_qs_tbl[i].externalbdbaseptr,
-				 (u32) immrbar_virt_to_phys(ugeth->
-							    p_rx_bd_ring[i]));
+				 (u32)qe_muram_dma(ugeth->p_rx_bd_ring[i]));
 		}
 		/* rest of fields handled by QE */
 	}
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index a0972219ccfc..3080d9dd031d 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -756,6 +756,36 @@ int __init of_scan_flat_dt(int (*it)(unsigned long node,
 }
 
 /**
+ * of_scan_flat_dt_subnodes - scan sub-nodes of a node call callback on each.
+ * @it: callback function
+ * @data: context data pointer
+ *
+ * This function is used to scan sub-nodes of a node.
+ */
+int __init of_scan_flat_dt_subnodes(unsigned long parent,
+				    int (*it)(unsigned long node,
+					      const char *uname,
+					      void *data),
+				    void *data)
+{
+	const void *blob = initial_boot_params;
+	int node;
+
+	fdt_for_each_subnode(node, blob, parent) {
+		const char *pathp;
+		int rc;
+
+		pathp = fdt_get_name(blob, node, NULL);
+		if (*pathp == '/')
+			pathp = kbasename(pathp);
+		rc = it(node, pathp, data);
+		if (rc)
+			return rc;
+	}
+	return 0;
+}
+
+/**
  * of_get_flat_dt_subnode_by_name - get the subnode by given name
  *
  * @node: the parent node
@@ -814,6 +844,14 @@ int __init of_flat_dt_match(unsigned long node, const char *const *compat)
 	return of_fdt_match(initial_boot_params, node, compat);
 }
 
+/**
+ * of_get_flat_dt_prop - Given a node in the flat blob, return the phandle
+ */
+uint32_t __init of_get_flat_dt_phandle(unsigned long node)
+{
+	return fdt_get_phandle(initial_boot_params, node);
+}
+
 struct fdt_scan_status {
 	const char *name;
 	int namelen;
diff --git a/drivers/soc/fsl/qbman/qman.c b/drivers/soc/fsl/qbman/qman.c
index 3d891db57ee6..18eefc3f1abe 100644
--- a/drivers/soc/fsl/qbman/qman.c
+++ b/drivers/soc/fsl/qbman/qman.c
@@ -1344,6 +1344,7 @@ static void qm_congestion_task(struct work_struct *work)
 	if (!qm_mc_result_timeout(&p->p, &mcr)) {
 		spin_unlock(&p->cgr_lock);
 		dev_crit(p->config->dev, "QUERYCONGESTION timeout\n");
+		qman_p_irqsource_add(p, QM_PIRQ_CSCI);
 		return;
 	}
 	/* mask out the ones I'm not interested in */
@@ -1358,6 +1359,7 @@ static void qm_congestion_task(struct work_struct *work)
 		if (cgr->cb && qman_cgrs_get(&c, cgr->cgrid))
 			cgr->cb(p, cgr, qman_cgrs_get(&rr, cgr->cgrid));
 	spin_unlock(&p->cgr_lock);
+	qman_p_irqsource_add(p, QM_PIRQ_CSCI);
 }
 
 static void qm_mr_process_task(struct work_struct *work)
@@ -1417,12 +1419,14 @@ static void qm_mr_process_task(struct work_struct *work)
 	}
 
 	qm_mr_cci_consume(&p->p, num);
+	qman_p_irqsource_add(p, QM_PIRQ_MRI);
 	preempt_enable();
 }
 
 static u32 __poll_portal_slow(struct qman_portal *p, u32 is)
 {
 	if (is & QM_PIRQ_CSCI) {
+		qman_p_irqsource_remove(p, QM_PIRQ_CSCI);
 		queue_work_on(smp_processor_id(), qm_portal_wq,
 			      &p->congestion_work);
 	}
@@ -1434,6 +1438,7 @@ static u32 __poll_portal_slow(struct qman_portal *p, u32 is)
 	}
 
 	if (is & QM_PIRQ_MRI) {
+		qman_p_irqsource_remove(p, QM_PIRQ_MRI);
 		queue_work_on(smp_processor_id(), qm_portal_wq,
 			      &p->mr_work);
 	}
diff --git a/drivers/soc/fsl/qe/qe.c b/drivers/soc/fsl/qe/qe.c
index ade168f5328e..2ef6fc6487c1 100644
--- a/drivers/soc/fsl/qe/qe.c
+++ b/drivers/soc/fsl/qe/qe.c
@@ -66,7 +66,7 @@ static unsigned int qe_num_of_snum;
 
 static phys_addr_t qebase = -1;
 
-phys_addr_t get_qe_base(void)
+static phys_addr_t get_qe_base(void)
 {
 	struct device_node *qe;
 	int ret;
@@ -90,8 +90,6 @@ phys_addr_t get_qe_base(void)
 	return qebase;
 }
 
-EXPORT_SYMBOL(get_qe_base);
-
 void qe_reset(void)
 {
 	if (qe_immr == NULL)
@@ -163,11 +161,15 @@ EXPORT_SYMBOL(qe_issue_cmd);
  */
 static unsigned int brg_clk = 0;
 
+#define CLK_GRAN	(1000)
+#define CLK_GRAN_LIMIT	(5)
+
 unsigned int qe_get_brg_clk(void)
 {
 	struct device_node *qe;
 	int size;
 	const u32 *prop;
+	unsigned int mod;
 
 	if (brg_clk)
 		return brg_clk;
@@ -185,10 +187,22 @@ unsigned int qe_get_brg_clk(void)
 
 	of_node_put(qe);
 
+	/* round this if near to a multiple of CLK_GRAN */
+	mod = brg_clk % CLK_GRAN;
+	if (mod) {
+		if (mod < CLK_GRAN_LIMIT)
+			brg_clk -= mod;
+		else if (mod > (CLK_GRAN - CLK_GRAN_LIMIT))
+			brg_clk += CLK_GRAN - mod;
+	}
+
 	return brg_clk;
 }
 EXPORT_SYMBOL(qe_get_brg_clk);
 
+#define PVR_VER_836x	0x8083
+#define PVR_VER_832x	0x8084
+
 /* Program the BRG to the given sampling rate and multiplier
  *
  * @brg: the BRG, QE_BRG1 - QE_BRG16
@@ -215,8 +229,9 @@ int qe_setbrg(enum qe_clock brg, unsigned int rate, unsigned int multiplier)
 	/* Errata QE_General4, which affects some MPC832x and MPC836x SOCs, says
 	   that the BRG divisor must be even if you're not using divide-by-16
 	   mode. */
-	if (!div16 && (divisor & 1) && (divisor > 3))
-		divisor++;
+	if (pvr_version_is(PVR_VER_836x) || pvr_version_is(PVR_VER_832x))
+		if (!div16 && (divisor & 1) && (divisor > 3))
+			divisor++;
 
 	tempval = ((divisor - 1) << QE_BRGC_DIVISOR_SHIFT) |
 		QE_BRGC_ENABLE | div16;
diff --git a/drivers/soc/fsl/qe/qe_tdm.c b/drivers/soc/fsl/qe/qe_tdm.c
index a1048b44e6b9..f744c214f680 100644
--- a/drivers/soc/fsl/qe/qe_tdm.c
+++ b/drivers/soc/fsl/qe/qe_tdm.c
@@ -177,6 +177,7 @@ err_miss_siram_property:
 	devm_iounmap(&pdev->dev, utdm->si_regs);
 	return ret;
 }
+EXPORT_SYMBOL(ucc_of_parse_tdm);
 
 void ucc_tdm_init(struct ucc_tdm *utdm, struct ucc_tdm_info *ut_info)
 {
@@ -274,3 +275,4 @@ void ucc_tdm_init(struct ucc_tdm *utdm, struct ucc_tdm_info *ut_info)
 		break;
 	}
 }
+EXPORT_SYMBOL(ucc_tdm_init);