irqchip: GICv3: ITS command queue

The ITS is configured through a number commands that the driver
issues to the HW using a memory-based circular buffer.

This patch implements the subset of commands that are required
for Linux.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Link: https://lkml.kernel.org/r/1416839720-18400-5-git-send-email-marc.zyngier@arm.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

1 files changed, 102 insertions, 0 deletions

diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h
index 040615a48bf5..21c9d70426d1 100644
--- a/include/linux/irqchip/arm-gic-v3.h
+++ b/include/linux/irqchip/arm-gic-v3.h
@@ -80,9 +80,27 @@
 #define GICR_MOVALLR                    0x0110
 #define GICR_PIDR2                      GICD_PIDR2
 
+#define GICR_CTLR_ENABLE_LPIS           (1UL << 0)
+
+#define GICR_TYPER_CPU_NUMBER(r)        (((r) >> 8) & 0xffff)
+
 #define GICR_WAKER_ProcessorSleep       (1U << 1)
 #define GICR_WAKER_ChildrenAsleep       (1U << 2)
 
+#define GICR_PROPBASER_NonShareable     (0U << 10)
+#define GICR_PROPBASER_InnerShareable   (1U << 10)
+#define GICR_PROPBASER_OuterShareable   (2U << 10)
+#define GICR_PROPBASER_SHAREABILITY_MASK (3UL << 10)
+#define GICR_PROPBASER_nCnB             (0U << 7)
+#define GICR_PROPBASER_nC               (1U << 7)
+#define GICR_PROPBASER_RaWt             (2U << 7)
+#define GICR_PROPBASER_RaWb             (3U << 7)
+#define GICR_PROPBASER_WaWt             (4U << 7)
+#define GICR_PROPBASER_WaWb             (5U << 7)
+#define GICR_PROPBASER_RaWaWt           (6U << 7)
+#define GICR_PROPBASER_RaWaWb           (7U << 7)
+#define GICR_PROPBASER_IDBITS_MASK      (0x1f)
+
 /*
  * Re-Distributor registers, offsets from SGI_base
  */
@@ -95,9 +113,93 @@
 #define GICR_IPRIORITYR0                GICD_IPRIORITYR
 #define GICR_ICFGR0                     GICD_ICFGR
 
+#define GICR_TYPER_PLPIS                (1U << 0)
 #define GICR_TYPER_VLPIS                (1U << 1)
 #define GICR_TYPER_LAST                 (1U << 4)
 
+#define LPI_PROP_GROUP1                 (1 << 1)
+#define LPI_PROP_ENABLED                (1 << 0)
+
+/*
+ * ITS registers, offsets from ITS_base
+ */
+#define GITS_CTLR                       0x0000
+#define GITS_IIDR                       0x0004
+#define GITS_TYPER                      0x0008
+#define GITS_CBASER                     0x0080
+#define GITS_CWRITER                    0x0088
+#define GITS_CREADR                     0x0090
+#define GITS_BASER                      0x0100
+#define GITS_PIDR2                      GICR_PIDR2
+
+#define GITS_TRANSLATER                 0x10040
+
+#define GITS_TYPER_PTA                  (1UL << 19)
+
+#define GITS_CBASER_VALID               (1UL << 63)
+#define GITS_CBASER_nCnB                (0UL << 59)
+#define GITS_CBASER_nC                  (1UL << 59)
+#define GITS_CBASER_RaWt                (2UL << 59)
+#define GITS_CBASER_RaWb                (3UL << 59)
+#define GITS_CBASER_WaWt                (4UL << 59)
+#define GITS_CBASER_WaWb                (5UL << 59)
+#define GITS_CBASER_RaWaWt              (6UL << 59)
+#define GITS_CBASER_RaWaWb              (7UL << 59)
+#define GITS_CBASER_NonShareable        (0UL << 10)
+#define GITS_CBASER_InnerShareable      (1UL << 10)
+#define GITS_CBASER_OuterShareable      (2UL << 10)
+#define GITS_CBASER_SHAREABILITY_MASK   (3UL << 10)
+
+#define GITS_BASER_NR_REGS              8
+
+#define GITS_BASER_VALID                (1UL << 63)
+#define GITS_BASER_nCnB                 (0UL << 59)
+#define GITS_BASER_nC                   (1UL << 59)
+#define GITS_BASER_RaWt                 (2UL << 59)
+#define GITS_BASER_RaWb                 (3UL << 59)
+#define GITS_BASER_WaWt                 (4UL << 59)
+#define GITS_BASER_WaWb                 (5UL << 59)
+#define GITS_BASER_RaWaWt               (6UL << 59)
+#define GITS_BASER_RaWaWb               (7UL << 59)
+#define GITS_BASER_TYPE_SHIFT           (56)
+#define GITS_BASER_TYPE(r)              (((r) >> GITS_BASER_TYPE_SHIFT) & 7)
+#define GITS_BASER_ENTRY_SIZE_SHIFT     (48)
+#define GITS_BASER_ENTRY_SIZE(r)        ((((r) >> GITS_BASER_ENTRY_SIZE_SHIFT) & 0xff) + 1)
+#define GITS_BASER_NonShareable         (0UL << 10)
+#define GITS_BASER_InnerShareable       (1UL << 10)
+#define GITS_BASER_OuterShareable       (2UL << 10)
+#define GITS_BASER_SHAREABILITY_SHIFT   (10)
+#define GITS_BASER_SHAREABILITY_MASK    (3UL << GITS_BASER_SHAREABILITY_SHIFT)
+#define GITS_BASER_PAGE_SIZE_SHIFT      (8)
+#define GITS_BASER_PAGE_SIZE_4K         (0UL << GITS_BASER_PAGE_SIZE_SHIFT)
+#define GITS_BASER_PAGE_SIZE_16K        (1UL << GITS_BASER_PAGE_SIZE_SHIFT)
+#define GITS_BASER_PAGE_SIZE_64K        (2UL << GITS_BASER_PAGE_SIZE_SHIFT)
+#define GITS_BASER_PAGE_SIZE_MASK       (3UL << GITS_BASER_PAGE_SIZE_SHIFT)
+
+#define GITS_BASER_TYPE_NONE            0
+#define GITS_BASER_TYPE_DEVICE          1
+#define GITS_BASER_TYPE_VCPU            2
+#define GITS_BASER_TYPE_CPU             3
+#define GITS_BASER_TYPE_COLLECTION      4
+#define GITS_BASER_TYPE_RESERVED5       5
+#define GITS_BASER_TYPE_RESERVED6       6
+#define GITS_BASER_TYPE_RESERVED7       7
+
+/*
+ * ITS commands
+ */
+#define GITS_CMD_MAPD                   0x08
+#define GITS_CMD_MAPC                   0x09
+#define GITS_CMD_MAPVI                  0x0a
+#define GITS_CMD_MOVI                   0x01
+#define GITS_CMD_DISCARD                0x0f
+#define GITS_CMD_INV                    0x0c
+#define GITS_CMD_MOVALL                 0x0e
+#define GITS_CMD_INVALL                 0x0d
+#define GITS_CMD_INT                    0x03
+#define GITS_CMD_CLEAR                  0x04
+#define GITS_CMD_SYNC                   0x05
+
 /*
  * CPU interface registers
  */