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path: root/target/linux/brcm2708/patches-4.4/0187-BCM270X_DT-Use-spidev-labels-in-overlays.patch
blob: 9a9dbc7b5a2395de9f15ef2be98bc6b3b1dc4deb (plain)
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From 33de40886f08899a438a12e26c50d0e6d025775e Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Tue, 15 Mar 2016 16:27:26 +0000
Subject: [PATCH 187/304] BCM270X_DT: Use spidev labels in overlays

---
 arch/arm/boot/dts/overlays/ads7846-overlay.dts     | 22 ++++++++++-------
 arch/arm/boot/dts/overlays/at86rf233-overlay.dts   | 11 +++++----
 arch/arm/boot/dts/overlays/enc28j60-overlay.dts    | 11 +++++----
 arch/arm/boot/dts/overlays/hy28a-overlay.dts       | 22 ++++++++++-------
 arch/arm/boot/dts/overlays/hy28b-overlay.dts       | 22 ++++++++++-------
 .../arm/boot/dts/overlays/mcp2515-can0-overlay.dts | 16 ++++++++-----
 .../arm/boot/dts/overlays/mcp2515-can1-overlay.dts | 16 ++++++++-----
 arch/arm/boot/dts/overlays/mz61581-overlay.dts     | 22 ++++++++++-------
 arch/arm/boot/dts/overlays/piscreen-overlay.dts    | 22 ++++++++++-------
 arch/arm/boot/dts/overlays/piscreen2r-overlay.dts  | 22 ++++++++++-------
 .../dts/overlays/pitft28-capacitive-overlay.dts    | 17 +++++++------
 .../dts/overlays/pitft28-resistive-overlay.dts     | 24 ++++++++++++-------
 arch/arm/boot/dts/overlays/rpi-display-overlay.dts | 22 ++++++++++-------
 arch/arm/boot/dts/overlays/tinylcd35-overlay.dts   | 28 +++++++++++++---------
 14 files changed, 174 insertions(+), 103 deletions(-)

--- a/arch/arm/boot/dts/overlays/ads7846-overlay.dts
+++ b/arch/arm/boot/dts/overlays/ads7846-overlay.dts
@@ -13,18 +13,24 @@
 		target = <&spi0>;
 		__overlay__ {
 			status = "okay";
+		};
+	};
 
-			spidev@0{
-				status = "disabled";
-			};
+	fragment@1 {
+		target = <&spidev0>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
 
-			spidev@1{
-				status = "disabled";
-			};
+	fragment@2 {
+		target = <&spidev1>;
+		__overlay__ {
+			status = "disabled";
 		};
 	};
 
-	fragment@1 {
+	fragment@3 {
 		target = <&gpio>;
 		__overlay__ {
 			ads7846_pins: ads7846_pins {
@@ -35,7 +41,7 @@
 		};
 	};
 
-	fragment@2 {
+	fragment@4 {
 		target = <&spi0>;
 		__overlay__ {
 			/* needed to avoid dtc warning */
--- a/arch/arm/boot/dts/overlays/at86rf233-overlay.dts
+++ b/arch/arm/boot/dts/overlays/at86rf233-overlay.dts
@@ -14,10 +14,6 @@
 
 			status = "okay";
 
-			spidev@0{
-				status = "disabled";
-			};
-
 			lowpan0: at86rf233@0 {
 				compatible = "atmel,at86rf233";
 				reg = <0>;
@@ -32,6 +28,13 @@
 	};
 
 	fragment@1 {
+		target = <&spidev0>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
+
+	fragment@2 {
 		target = <&gpio>;
 		__overlay__ {
 			lowpan0_pins: lowpan0_pins {
--- a/arch/arm/boot/dts/overlays/enc28j60-overlay.dts
+++ b/arch/arm/boot/dts/overlays/enc28j60-overlay.dts
@@ -14,10 +14,6 @@
 
 			status = "okay";
 
-			spidev@0{
-				status = "disabled";
-			};
-
 			eth1: enc28j60@0{
 				compatible = "microchip,enc28j60";
 				reg = <0>; /* CE0 */
@@ -32,6 +28,13 @@
 	};
 
 	fragment@1 {
+		target = <&spidev0>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
+
+	fragment@2 {
 		target = <&gpio>;
 		__overlay__ {
 			eth1_pins: eth1_pins {
--- a/arch/arm/boot/dts/overlays/hy28a-overlay.dts
+++ b/arch/arm/boot/dts/overlays/hy28a-overlay.dts
@@ -13,18 +13,24 @@
 		target = <&spi0>;
 		__overlay__ {
 			status = "okay";
+		};
+	};
 
-			spidev@0{
-				status = "disabled";
-			};
+	fragment@1 {
+		target = <&spidev0>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
 
-			spidev@1{
-				status = "disabled";
-			};
+	fragment@2 {
+		target = <&spidev1>;
+		__overlay__ {
+			status = "disabled";
 		};
 	};
 
-	fragment@1 {
+	fragment@3 {
 		target = <&gpio>;
 		__overlay__ {
 			hy28a_pins: hy28a_pins {
@@ -34,7 +40,7 @@
 		};
 	};
 
-	fragment@2 {
+	fragment@4 {
 		target = <&spi0>;
 		__overlay__ {
 			/* needed to avoid dtc warning */
--- a/arch/arm/boot/dts/overlays/hy28b-overlay.dts
+++ b/arch/arm/boot/dts/overlays/hy28b-overlay.dts
@@ -13,18 +13,24 @@
 		target = <&spi0>;
 		__overlay__ {
 			status = "okay";
+		};
+	};
 
-			spidev@0{
-				status = "disabled";
-			};
+	fragment@1 {
+		target = <&spidev0>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
 
-			spidev@1{
-				status = "disabled";
-			};
+	fragment@2 {
+		target = <&spidev1>;
+		__overlay__ {
+			status = "disabled";
 		};
 	};
 
-	fragment@1 {
+	fragment@3 {
 		target = <&gpio>;
 		__overlay__ {
 			hy28b_pins: hy28b_pins {
@@ -34,7 +40,7 @@
 		};
 	};
 
-	fragment@2 {
+	fragment@4 {
 		target = <&spi0>;
 		__overlay__ {
 			/* needed to avoid dtc warning */
--- a/arch/arm/boot/dts/overlays/mcp2515-can0-overlay.dts
+++ b/arch/arm/boot/dts/overlays/mcp2515-can0-overlay.dts
@@ -12,14 +12,18 @@
         target = <&spi0>;
         __overlay__ {
             status = "okay";
-            spidev@0{
-                status = "disabled";
-            };
         };
     };
 
-    /* the interrupt pin of the can-controller */
     fragment@1 {
+	target = <&spidev0>;
+	__overlay__ {
+	    status = "disabled";
+	};
+    };
+
+    /* the interrupt pin of the can-controller */
+    fragment@2 {
         target = <&gpio>;
         __overlay__ {
             can0_pins: can0_pins {
@@ -30,7 +34,7 @@
     };
 
     /* the clock/oscillator of the can-controller */
-    fragment@2 {
+    fragment@3 {
         target-path = "/clocks";
         __overlay__ {
             /* external oscillator of mcp2515 on SPI0.0 */
@@ -43,7 +47,7 @@
     };
 
     /* the spi config of the can-controller itself binding everything together */
-    fragment@3 {
+    fragment@4 {
         target = <&spi0>;
         __overlay__ {
             /* needed to avoid dtc warning */
--- a/arch/arm/boot/dts/overlays/mcp2515-can1-overlay.dts
+++ b/arch/arm/boot/dts/overlays/mcp2515-can1-overlay.dts
@@ -12,14 +12,18 @@
         target = <&spi0>;
         __overlay__ {
             status = "okay";
-            spidev@1{
-                status = "disabled";
-            };
         };
     };
 
-    /* the interrupt pin of the can-controller */
     fragment@1 {
+	target = <&spidev1>;
+	__overlay__ {
+	    status = "disabled";
+	};
+    };
+
+    /* the interrupt pin of the can-controller */
+    fragment@2 {
         target = <&gpio>;
         __overlay__ {
             can1_pins: can1_pins {
@@ -30,7 +34,7 @@
     };
 
     /* the clock/oscillator of the can-controller */
-    fragment@2 {
+    fragment@3 {
         target-path = "/clocks";
         __overlay__ {
             /* external oscillator of mcp2515 on spi0.1 */
@@ -43,7 +47,7 @@
     };
 
     /* the spi config of the can-controller itself binding everything together */
-    fragment@3 {
+    fragment@4 {
         target = <&spi0>;
         __overlay__ {
             /* needed to avoid dtc warning */
--- a/arch/arm/boot/dts/overlays/mz61581-overlay.dts
+++ b/arch/arm/boot/dts/overlays/mz61581-overlay.dts
@@ -13,18 +13,24 @@
 		target = <&spi0>;
 		__overlay__ {
 			status = "okay";
+		};
+	};
 
-			spidev@0{
-				status = "disabled";
-			};
+	fragment@1 {
+		target = <&spidev0>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
 
-			spidev@1{
-				status = "disabled";
-			};
+	fragment@2 {
+		target = <&spidev1>;
+		__overlay__ {
+			status = "disabled";
 		};
 	};
 
-	fragment@1 {
+	fragment@3 {
 		target = <&gpio>;
 		__overlay__ {
 			mz61581_pins: mz61581_pins {
@@ -34,7 +40,7 @@
 		};
 	};
 
-	fragment@2 {
+	fragment@4 {
 		target = <&spi0>;
 		__overlay__ {
 			/* needed to avoid dtc warning */
--- a/arch/arm/boot/dts/overlays/piscreen-overlay.dts
+++ b/arch/arm/boot/dts/overlays/piscreen-overlay.dts
@@ -13,18 +13,24 @@
 		target = <&spi0>;
 		__overlay__ {
 			status = "okay";
+		};
+	};
 
-			spidev@0{
-				status = "disabled";
-			};
+	fragment@1 {
+		target = <&spidev0>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
 
-			spidev@1{
-				status = "disabled";
-			};
+	fragment@2 {
+		target = <&spidev1>;
+		__overlay__ {
+			status = "disabled";
 		};
 	};
 
-	fragment@1 {
+	fragment@3 {
 		target = <&gpio>;
 		__overlay__ {
 			piscreen_pins: piscreen_pins {
@@ -34,7 +40,7 @@
 		};
 	};
 
-	fragment@2 {
+	fragment@4 {
 		target = <&spi0>;
 		__overlay__ {
 			/* needed to avoid dtc warning */
--- a/arch/arm/boot/dts/overlays/piscreen2r-overlay.dts
+++ b/arch/arm/boot/dts/overlays/piscreen2r-overlay.dts
@@ -13,18 +13,24 @@
 		target = <&spi0>;
 		__overlay__ {
 			status = "okay";
+		};
+	};
 
-			spidev@0{
-				status = "disabled";
-			};
+	fragment@1 {
+		target = <&spidev0>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
 
-			spidev@1{
-				status = "disabled";
-			};
+	fragment@2 {
+		target = <&spidev1>;
+		__overlay__ {
+			status = "disabled";
 		};
 	};
 
-	fragment@1 {
+	fragment@3 {
 		target = <&gpio>;
 		__overlay__ {
 			piscreen2_pins: piscreen2_pins {
@@ -34,7 +40,7 @@
 		};
 	};
 
-	fragment@2 {
+	fragment@4 {
 		target = <&spi0>;
 		__overlay__ {
 			/* needed to avoid dtc warning */
--- a/arch/arm/boot/dts/overlays/pitft28-capacitive-overlay.dts
+++ b/arch/arm/boot/dts/overlays/pitft28-capacitive-overlay.dts
@@ -13,14 +13,17 @@
                 target = <&spi0>;
                 __overlay__ {
                         status = "okay";
-
-                        spidev@0{
-                                status = "disabled";
-                        };
                 };
         };
 
-        fragment@1 {
+	fragment@1 {
+		target = <&spidev0>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
+
+        fragment@2 {
                 target = <&gpio>;
                 __overlay__ {
                         pitft_pins: pitft_pins {
@@ -31,7 +34,7 @@
                 };
         };
 
-        fragment@2 {
+        fragment@3 {
                 target = <&spi0>;
                 __overlay__ {
                         /* needed to avoid dtc warning */
@@ -55,7 +58,7 @@
                 };
         };
 
-        fragment@3 {
+        fragment@4 {
                 target = <&i2c1>;
                 __overlay__ {
                         /* needed to avoid dtc warning */
--- a/arch/arm/boot/dts/overlays/pitft28-resistive-overlay.dts
+++ b/arch/arm/boot/dts/overlays/pitft28-resistive-overlay.dts
@@ -13,18 +13,24 @@
 		target = <&spi0>;
 		__overlay__ {
 			status = "okay";
+		};
+	};
 
-			spidev@0{
-				status = "disabled";
-			};
+	fragment@1 {
+		target = <&spidev0>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
 
-			spidev@1{
-				status = "disabled";
-			};
+	fragment@2 {
+		target = <&spidev1>;
+		__overlay__ {
+			status = "disabled";
 		};
 	};
 
-	fragment@1 {
+	fragment@3 {
 		target = <&gpio>;
 		__overlay__ {
 			pitft_pins: pitft_pins {
@@ -35,7 +41,7 @@
 		};
 	};
 
-	fragment@2 {
+	fragment@4 {
 		target = <&spi0>;
 		__overlay__ {
 			/* needed to avoid dtc warning */
@@ -95,7 +101,7 @@
 		};
 	};
 
-	fragment@3 {
+	fragment@5 {
 		target-path = "/soc";
 		__overlay__ {
 			backlight {
--- a/arch/arm/boot/dts/overlays/rpi-display-overlay.dts
+++ b/arch/arm/boot/dts/overlays/rpi-display-overlay.dts
@@ -13,18 +13,24 @@
 		target = <&spi0>;
 		__overlay__ {
 			status = "okay";
+		};
+	};
 
-			spidev@0{
-				status = "disabled";
-			};
+	fragment@1 {
+		target = <&spidev0>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
 
-			spidev@1{
-				status = "disabled";
-			};
+	fragment@2 {
+		target = <&spidev1>;
+		__overlay__ {
+			status = "disabled";
 		};
 	};
 
-	fragment@1 {
+	fragment@3 {
 		target = <&gpio>;
 		__overlay__ {
 			rpi_display_pins: rpi_display_pins {
@@ -35,7 +41,7 @@
 		};
 	};
 
-	fragment@2 {
+	fragment@4 {
 		target = <&spi0>;
 		__overlay__ {
 			/* needed to avoid dtc warning */
--- a/arch/arm/boot/dts/overlays/tinylcd35-overlay.dts
+++ b/arch/arm/boot/dts/overlays/tinylcd35-overlay.dts
@@ -30,18 +30,24 @@
 		target = <&spi0>;
 		__overlay__ {
 			status = "okay";
+		};
+	};
 
-			spidev@0{
-				status = "disabled";
-			};
+	fragment@1 {
+		target = <&spidev0>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
 
-			spidev@1{
-				status = "disabled";
-			};
+	fragment@2 {
+		target = <&spidev1>;
+		__overlay__ {
+			status = "disabled";
 		};
 	};
 
-	fragment@1 {
+	fragment@3 {
 		target = <&gpio>;
 		__overlay__ {
 			tinylcd35_pins: tinylcd35_pins {
@@ -60,7 +66,7 @@
 		};
 	};
 
-	fragment@2 {
+	fragment@4 {
 		target = <&spi0>;
 		__overlay__ {
 			/* needed to avoid dtc warning */
@@ -124,7 +130,7 @@
 
 	/*  RTC    */
 
-	fragment@3 {
+	fragment@5 {
 		target = <&i2c1>;
 		__overlay__ {
 			#address-cells = <1>;
@@ -138,7 +144,7 @@
 		};
 	};
 
-	fragment@4 {
+	fragment@6 {
 		target = <&i2c1>;
 		__overlay__ {
 			#address-cells = <1>;
@@ -156,7 +162,7 @@
 	 * Values for input event code is found under the
 	 * 'Keys and buttons' heading in include/uapi/linux/input.h
 	 */
-	fragment@5 {
+	fragment@7 {
 		target-path = "/soc";
 		__overlay__ {
 			keypad: keypad {
span>unsigned long nr_pfns, unsigned long pfn_align) { unsigned long pg, i; for ( pg = 0; (pg + nr_pfns) < max_page; pg += pfn_align ) { for ( i = 0; i < nr_pfns; i++ ) if ( allocated_in_map(pg + i) ) break; if ( i == nr_pfns ) { map_alloc(pg, nr_pfns); return pg; } } return 0; } /************************* * BINARY BUDDY ALLOCATOR */ #define MEMZONE_XEN 0 #define MEMZONE_DOM 1 #define MEMZONE_DMADOM 2 #define NR_ZONES 3 #define MAX_DMADOM_PFN 0xFFFFF #define pfn_dom_zone_type(_pfn) \ (((_pfn) <= MAX_DMADOM_PFN) ? MEMZONE_DMADOM : MEMZONE_DOM) /* Up to 2^20 pages can be allocated at once. */ #define MAX_ORDER 20 static struct list_head heap[NR_ZONES][MAX_ORDER+1]; static unsigned long avail[NR_ZONES]; static spinlock_t heap_lock = SPIN_LOCK_UNLOCKED; void end_boot_allocator(void) { unsigned long i, j; int curr_free = 0, next_free = 0; memset(avail, 0, sizeof(avail)); for ( i = 0; i < NR_ZONES; i++ ) for ( j = 0; j <= MAX_ORDER; j++ ) INIT_LIST_HEAD(&heap[i][j]); /* Pages that are free now go to the domain sub-allocator. */ for ( i = 0; i < max_page; i++ ) { curr_free = next_free; next_free = !allocated_in_map(i+1); if ( next_free ) map_alloc(i+1, 1); /* prevent merging in free_heap_pages() */ if ( curr_free ) free_heap_pages(pfn_dom_zone_type(i), pfn_to_page(i), 0); } } /* Hand the specified arbitrary page range to the specified heap zone. */ void init_heap_pages( unsigned int zone, struct pfn_info *pg, unsigned long nr_pages) { unsigned long i; ASSERT(zone < NR_ZONES); for ( i = 0; i < nr_pages; i++ ) free_heap_pages(zone, pg+i, 0); } /* Allocate 2^@order contiguous pages. */ struct pfn_info *alloc_heap_pages(unsigned int zone, unsigned int order) { int i; struct pfn_info *pg; ASSERT(zone < NR_ZONES); if ( unlikely(order > MAX_ORDER) ) return NULL; spin_lock(&heap_lock); /* Find smallest order which can satisfy the request. */ for ( i = order; i <= MAX_ORDER; i++ ) if ( !list_empty(&heap[zone][i]) ) goto found; /* No suitable memory blocks. Fail the request. */ spin_unlock(&heap_lock); return NULL; found: pg = list_entry(heap[zone][i].next, struct pfn_info, list); list_del(&pg->list); /* We may have to halve the chunk a number of times. */ while ( i != order ) { PFN_ORDER(pg) = --i; list_add_tail(&pg->list, &heap[zone][i]); pg += 1 << i; } map_alloc(page_to_pfn(pg), 1 << order); avail[zone] -= 1 << order; spin_unlock(&heap_lock); return pg; } /* Free 2^@order set of pages. */ void free_heap_pages( unsigned int zone, struct pfn_info *pg, unsigned int order) { unsigned long mask; ASSERT(zone < NR_ZONES); ASSERT(order <= MAX_ORDER); spin_lock(&heap_lock); map_free(page_to_pfn(pg), 1 << order); avail[zone] += 1 << order; /* Merge chunks as far as possible. */ while ( order < MAX_ORDER ) { mask = 1 << order; if ( (page_to_pfn(pg) & mask) ) { /* Merge with predecessor block? */ if ( allocated_in_map(page_to_pfn(pg)-mask) || (PFN_ORDER(pg-mask) != order) ) break; list_del(&(pg-mask)->list); pg -= mask; } else { /* Merge with successor block? */ if ( allocated_in_map(page_to_pfn(pg)+mask) || (PFN_ORDER(pg+mask) != order) ) break; list_del(&(pg+mask)->list); } order++; } PFN_ORDER(pg) = order; list_add_tail(&pg->list, &heap[zone][order]); spin_unlock(&heap_lock); } /* * Scrub all unallocated pages in all heap zones. This function is more * convoluted than appears necessary because we do not want to continuously * hold the lock or disable interrupts while scrubbing very large memory areas. */ void scrub_heap_pages(void) { void *p; unsigned long pfn; int cpu = smp_processor_id(); printk("Scrubbing Free RAM: "); for ( pfn = 0; pfn < max_page; pfn++ ) { /* Every 100MB, print a progress dot. */ if ( (pfn % ((100*1024*1024)/PAGE_SIZE)) == 0 ) printk("."); if ( unlikely(softirq_pending(cpu)) ) do_softirq(); /* Quick lock-free check. */ if ( allocated_in_map(pfn) ) continue; spin_lock_irq(&heap_lock); /* Re-check page status with lock held. */ if ( !allocated_in_map(pfn) ) { if ( IS_XEN_HEAP_FRAME(pfn_to_page(pfn)) ) { p = page_to_virt(pfn_to_page(pfn)); memguard_unguard_range(p, PAGE_SIZE); clear_page(p); memguard_guard_range(p, PAGE_SIZE); } else { p = map_domain_page(pfn); clear_page(p); unmap_domain_page(p); } } spin_unlock_irq(&heap_lock); } printk("done.\n"); } /************************* * XEN-HEAP SUB-ALLOCATOR */ void init_xenheap_pages(physaddr_t ps, physaddr_t pe) { unsigned long flags; ps = round_pgup(ps); pe = round_pgdown(pe); if ( pe <= ps ) return; memguard_guard_range(phys_to_virt(ps), pe - ps); /* * Yuk! Ensure there is a one-page buffer between Xen and Dom zones, to * prevent merging of power-of-two blocks across the zone boundary. */ if ( !IS_XEN_HEAP_FRAME(phys_to_page(pe)) ) pe -= PAGE_SIZE; local_irq_save(flags); init_heap_pages(MEMZONE_XEN, phys_to_page(ps), (pe - ps) >> PAGE_SHIFT); local_irq_restore(flags); } void *alloc_xenheap_pages(unsigned int order) { unsigned long flags; struct pfn_info *pg; int i; local_irq_save(flags); pg = alloc_heap_pages(MEMZONE_XEN, order); local_irq_restore(flags); if ( unlikely(pg == NULL) ) goto no_memory; memguard_unguard_range(page_to_virt(pg), 1 << (order + PAGE_SHIFT)); for ( i = 0; i < (1 << order); i++ ) { pg[i].count_info = 0; pg[i].u.inuse._domain = 0; pg[i].u.inuse.type_info = 0; } return page_to_virt(pg); no_memory: printk("Cannot handle page request order %d!\n", order); return NULL; } void free_xenheap_pages(void *v, unsigned int order) { unsigned long flags; memguard_guard_range(v, 1 << (order + PAGE_SHIFT)); local_irq_save(flags); free_heap_pages(MEMZONE_XEN, virt_to_page(v), order); local_irq_restore(flags); } /************************* * DOMAIN-HEAP SUB-ALLOCATOR */ void init_domheap_pages(physaddr_t ps, physaddr_t pe) { ASSERT(!in_irq()); ps = round_pgup(ps) >> PAGE_SHIFT; pe = round_pgdown(pe) >> PAGE_SHIFT; if ( pe <= ps ) return; if ( (ps < MAX_DMADOM_PFN) && (pe > MAX_DMADOM_PFN) ) { init_heap_pages( MEMZONE_DMADOM, pfn_to_page(ps), MAX_DMADOM_PFN - ps); init_heap_pages( MEMZONE_DOM, pfn_to_page(MAX_DMADOM_PFN), pe - MAX_DMADOM_PFN); } else { init_heap_pages(pfn_dom_zone_type(ps), pfn_to_page(ps), pe - ps); } } struct pfn_info *alloc_domheap_pages( struct domain *d, unsigned int order, unsigned int flags) { struct pfn_info *pg; cpumask_t mask; int i; ASSERT(!in_irq()); pg = NULL; if (! (flags & ALLOC_DOM_DMA)) pg = alloc_heap_pages(MEMZONE_DOM, order); if (pg == NULL) { if ( unlikely((pg = alloc_heap_pages(MEMZONE_DMADOM, order)) == NULL) ) return NULL; } mask = pg->u.free.cpumask; tlbflush_filter(mask, pg->tlbflush_timestamp); pg->count_info = 0; pg->u.inuse._domain = 0; pg->u.inuse.type_info = 0; for ( i = 1; i < (1 << order); i++ ) { /* Add in any extra CPUs that need flushing because of this page. */ cpumask_t extra_cpus_mask; cpus_andnot(extra_cpus_mask, pg[i].u.free.cpumask, mask); tlbflush_filter(extra_cpus_mask, pg[i].tlbflush_timestamp); cpus_or(mask, mask, extra_cpus_mask); pg[i].count_info = 0; pg[i].u.inuse._domain = 0; pg[i].u.inuse.type_info = 0; } if ( unlikely(!cpus_empty(mask)) ) { perfc_incrc(need_flush_tlb_flush); flush_tlb_mask(mask); } if ( d == NULL ) return pg; spin_lock(&d->page_alloc_lock); if ( unlikely(test_bit(_DOMF_dying, &d->domain_flags)) || unlikely((d->tot_pages + (1 << order)) > d->max_pages) ) { DPRINTK("Over-allocation for domain %u: %u > %u\n", d->domain_id, d->tot_pages + (1 << order), d->max_pages); DPRINTK("...or the domain is dying (%d)\n", !!test_bit(_DOMF_dying, &d->domain_flags)); spin_unlock(&d->page_alloc_lock); free_heap_pages(pfn_dom_zone_type(page_to_pfn(pg)), pg, order); return NULL; } if ( unlikely(d->tot_pages == 0) ) get_knownalive_domain(d); d->tot_pages += 1 << order; for ( i = 0; i < (1 << order); i++ ) { page_set_owner(&pg[i], d); wmb(); /* Domain pointer must be visible before updating refcnt. */ pg[i].count_info |= PGC_allocated | 1; list_add_tail(&pg[i].list, &d->page_list); } spin_unlock(&d->page_alloc_lock); return pg; } void free_domheap_pages(struct pfn_info *pg, unsigned int order) { int i, drop_dom_ref; struct domain *d = page_get_owner(pg); ASSERT(!in_irq()); if ( unlikely(IS_XEN_HEAP_FRAME(pg)) ) { /* NB. May recursively lock from relinquish_memory(). */ spin_lock_recursive(&d->page_alloc_lock); for ( i = 0; i < (1 << order); i++ ) list_del(&pg[i].list); d->xenheap_pages -= 1 << order; drop_dom_ref = (d->xenheap_pages == 0); spin_unlock_recursive(&d->page_alloc_lock); } else if ( likely(d != NULL) ) { /* NB. May recursively lock from relinquish_memory(). */ spin_lock_recursive(&d->page_alloc_lock); for ( i = 0; i < (1 << order); i++ ) { shadow_drop_references(d, &pg[i]); ASSERT(((pg[i].u.inuse.type_info & PGT_count_mask) == 0) || shadow_tainted_refcnts(d)); pg[i].tlbflush_timestamp = tlbflush_current_time(); pg[i].u.free.cpumask = d->cpumask; list_del(&pg[i].list); } d->tot_pages -= 1 << order; drop_dom_ref = (d->tot_pages == 0); spin_unlock_recursive(&d->page_alloc_lock); if ( likely(!test_bit(_DOMF_dying, &d->domain_flags)) ) { free_heap_pages(pfn_dom_zone_type(page_to_pfn(pg)), pg, order); } else { /* * Normally we expect a domain to clear pages before freeing them, * if it cares about the secrecy of their contents. However, after * a domain has died we assume responsibility for erasure. */ for ( i = 0; i < (1 << order); i++ ) { spin_lock(&page_scrub_lock); list_add(&pg[i].list, &page_scrub_list); spin_unlock(&page_scrub_lock); } } } else { /* Freeing an anonymous domain-heap page. */ free_heap_pages(pfn_dom_zone_type(page_to_pfn(pg)), pg, order); drop_dom_ref = 0; } if ( drop_dom_ref ) put_domain(d); } unsigned long avail_domheap_pages(void) { return avail[MEMZONE_DOM] + avail[MEMZONE_DMADOM]; } /************************* * PAGE SCRUBBING */ static void page_scrub_softirq(void) { struct list_head *ent; struct pfn_info *pg; void *p; int i; s_time_t start = NOW(); /* Aim to do 1ms of work (ten percent of a 10ms jiffy). */ do { spin_lock(&page_scrub_lock); if ( unlikely((ent = page_scrub_list.next) == &page_scrub_list) ) { spin_unlock(&page_scrub_lock); return; } /* Peel up to 16 pages from the list. */ for ( i = 0; i < 16; i++ ) { if ( ent->next == &page_scrub_list ) break; ent = ent->next; } /* Remove peeled pages from the list. */ ent->next->prev = &page_scrub_list; page_scrub_list.next = ent->next; spin_unlock(&page_scrub_lock); /* Working backwards, scrub each page in turn. */ while ( ent != &page_scrub_list ) { pg = list_entry(ent, struct pfn_info, list); ent = ent->prev; p = map_domain_page(page_to_pfn(pg)); clear_page(p); unmap_domain_page(p); free_heap_pages(pfn_dom_zone_type(page_to_pfn(pg)), pg, 0); } } while ( (NOW() - start) < MILLISECS(1) ); } static __init int page_scrub_init(void) { open_softirq(PAGE_SCRUB_SOFTIRQ, page_scrub_softirq); return 0; } __initcall(page_scrub_init); /* * Local variables: * mode: C * c-set-style: "BSD" * c-basic-offset: 4 * tab-width: 4 * indent-tabs-mode: nil * End: */