Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / mcb / mcb-parse.c

diff --git a/kernel/drivers/mcb/mcb-parse.c b/kernel/drivers/mcb/mcb-parse.c
new file mode 100644 (file)
index 0000000..0049269
--- /dev/null
+++ b/kernel/drivers/mcb/mcb-parse.c
@@ -0,0 +1,160 @@
+#include <linux/types.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <linux/io.h>
+#include <linux/mcb.h>
+
+#include "mcb-internal.h"
+
+struct mcb_parse_priv {
+       phys_addr_t mapbase;
+       void __iomem *base;
+};
+
+#define for_each_chameleon_cell(dtype, p)      \
+       for ((dtype) = get_next_dtype((p));     \
+            (dtype) != CHAMELEON_DTYPE_END;    \
+            (dtype) = get_next_dtype((p)))
+
+static inline uint32_t get_next_dtype(void __iomem *p)
+{
+       uint32_t dtype;
+
+       dtype = readl(p);
+       return dtype >> 28;
+}
+
+static int chameleon_parse_bdd(struct mcb_bus *bus,
+                       phys_addr_t mapbase,
+                       void __iomem *base)
+{
+       return 0;
+}
+
+static int chameleon_parse_gdd(struct mcb_bus *bus,
+                       phys_addr_t mapbase,
+                       void __iomem *base)
+{
+       struct chameleon_gdd __iomem *gdd =
+               (struct chameleon_gdd __iomem *) base;
+       struct mcb_device *mdev;
+       u32 offset;
+       u32 size;
+       int ret;
+       __le32 reg1;
+       __le32 reg2;
+
+       mdev = mcb_alloc_dev(bus);
+       if (!mdev)
+               return -ENOMEM;
+
+       reg1 = readl(&gdd->reg1);
+       reg2 = readl(&gdd->reg2);
+       offset = readl(&gdd->offset);
+       size = readl(&gdd->size);
+
+       mdev->id = GDD_DEV(reg1);
+       mdev->rev = GDD_REV(reg1);
+       mdev->var = GDD_VAR(reg1);
+       mdev->bar = GDD_BAR(reg1);
+       mdev->group = GDD_GRP(reg2);
+       mdev->inst = GDD_INS(reg2);
+
+       pr_debug("Found a 16z%03d\n", mdev->id);
+
+       mdev->irq.start = GDD_IRQ(reg1);
+       mdev->irq.end = GDD_IRQ(reg1);
+       mdev->irq.flags = IORESOURCE_IRQ;
+
+       mdev->mem.start = mapbase + offset;
+       mdev->mem.end = mdev->mem.start + size - 1;
+       mdev->mem.flags = IORESOURCE_MEM;
+
+       mdev->is_added = false;
+
+       ret = mcb_device_register(bus, mdev);
+       if (ret < 0)
+               goto err;
+
+       return 0;
+
+err:
+       mcb_free_dev(mdev);
+
+       return ret;
+}
+
+int chameleon_parse_cells(struct mcb_bus *bus, phys_addr_t mapbase,
+                       void __iomem *base)
+{
+       char __iomem *p = base;
+       struct chameleon_fpga_header *header;
+       uint32_t dtype;
+       int num_cells = 0;
+       int ret = 0;
+       u32 hsize;
+
+       hsize = sizeof(struct chameleon_fpga_header);
+
+       header = kzalloc(hsize, GFP_KERNEL);
+       if (!header)
+               return -ENOMEM;
+
+       /* Extract header information */
+       memcpy_fromio(header, p, hsize);
+       /* We only support chameleon v2 at the moment */
+       header->magic = le16_to_cpu(header->magic);
+       if (header->magic != CHAMELEONV2_MAGIC) {
+               pr_err("Unsupported chameleon version 0x%x\n",
+                               header->magic);
+               kfree(header);
+               return -ENODEV;
+       }
+       p += hsize;
+
+       pr_debug("header->revision = %d\n", header->revision);
+       pr_debug("header->model = 0x%x ('%c')\n", header->model,
+               header->model);
+       pr_debug("header->minor = %d\n", header->minor);
+       pr_debug("header->bus_type = 0x%x\n", header->bus_type);
+
+
+       pr_debug("header->magic = 0x%x\n", header->magic);
+       pr_debug("header->filename = \"%.*s\"\n", CHAMELEON_FILENAME_LEN,
+               header->filename);
+
+       for_each_chameleon_cell(dtype, p) {
+               switch (dtype) {
+               case CHAMELEON_DTYPE_GENERAL:
+                       ret = chameleon_parse_gdd(bus, mapbase, p);
+                       if (ret < 0)
+                               goto out;
+                       p += sizeof(struct chameleon_gdd);
+                       break;
+               case CHAMELEON_DTYPE_BRIDGE:
+                       chameleon_parse_bdd(bus, mapbase, p);
+                       p += sizeof(struct chameleon_bdd);
+                       break;
+               case CHAMELEON_DTYPE_END:
+                       break;
+               default:
+                       pr_err("Invalid chameleon descriptor type 0x%x\n",
+                               dtype);
+                       kfree(header);
+                       return -EINVAL;
+               }
+               num_cells++;
+       }
+
+       if (num_cells == 0)
+               num_cells = -EINVAL;
+
+       kfree(header);
+       return num_cells;
+
+out:
+       kfree(header);
+       return ret;
+}
+EXPORT_SYMBOL_GPL(chameleon_parse_cells);