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Message-Id: <1205226478-7641-13-git-send-email-wei.zhang@freescale.com>
Date: Tue, 11 Mar 2008 17:07:54 +0800
From: Zhang Wei <wei.zhang@...escale.com>
To: mporter@...nel.crashing.org, akpm@...ux-foundation.org,
galak@...nel.crashing.org
Cc: linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
Zhang Wei <wei.zhang@...escale.com>
Subject: [PATCH 13/17] Add FSL RapidIO controller memory ops functions.
Add FSL RapidIO controller (MPC85xx, MPC86xx) memory operation
functions, which include map inbound/outbound window and
unmap incound/outbound window.
Signed-off-by: Zhang Wei <wei.zhang@...escale.com>
---
arch/powerpc/sysdev/fsl_rio.c | 204 +++++++++++++++++++++++++++++++++++++++++
1 files changed, 204 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c
index ed48607..917eed0 100644
--- a/arch/powerpc/sysdev/fsl_rio.c
+++ b/arch/powerpc/sysdev/fsl_rio.c
@@ -30,6 +30,8 @@
#define IRQ_RIO_TX(m) (((struct rio_priv *)(m->priv))->txirq)
#define IRQ_RIO_RX(m) (((struct rio_priv *)(m->priv))->rxirq)
+#define IS_64BIT_RES ((sizeof(resource_size_t) == 8) ? 1 : 0)
+
#define RIO_ATMU_REGS_OFFSET 0x10c00
#define RIO_P_MSG_REGS_OFFSET 0x11000
#define RIO_S_MSG_REGS_OFFSET 0x13000
@@ -39,6 +41,15 @@
#define RIO_ISR_AACR_AA 0x1 /* Accept All ID */
#define RIO_MAINT_WIN_SIZE 0x400000
#define RIO_DBELL_WIN_SIZE 0x1000
+#define RIO_MAX_INB_ATMU 4
+#define RIO_MAX_OUTB_ATMU 8
+#define RIO_INB_ATMU_REGS_OFFSET 0x10de0
+#define RIO_ATMU_EN_MASK 0x80000000
+
+#define RIO_NREAD 0x4
+#define RIO_NWRITE 0x4
+#define RIO_NWRITE_R 0x5
+#define RIO_NREAD_R 0x5
#define RIO_MSG_OMR_MUI 0x00000002
#define RIO_MSG_OSR_TE 0x00000080
@@ -82,6 +93,15 @@ struct rio_atmu_regs {
u32 pad3[3];
};
+struct rio_inb_atmu_regs {
+ u32 riwtar;
+ u32 pad1;
+ u32 riwbar;
+ u32 pad2;
+ u32 riwar;
+ u32 pad3[3];
+};
+
struct rio_msg_regs {
u32 omr;
u32 osr;
@@ -334,6 +354,182 @@ fsl_rio_config_write(struct rio_mport *mport, int index, u16 destid,
}
/**
+ * fsl_rio_map_inb_mem -- Mapping inbound memory region.
+ * @lstart: Local memory space start address.
+ * @rstart: RapidIO space start address.
+ * @size: The mapping region size.
+ * @flags: Flags for mapping. 0 for using default flags.
+ *
+ * Return: 0 -- Success.
+ *
+ * This function will create the inbound mapping
+ * from rstart to lstart.
+ */
+static int fsl_rio_map_inb_mem(struct rio_mport *mport, resource_size_t lstart,
+ resource_size_t rstart, resource_size_t size, u32 flags)
+{
+ int i;
+ struct rio_priv *priv = mport->priv;
+ struct rio_inb_atmu_regs __iomem *inbatmu = (struct rio_inb_atmu_regs *)
+ (priv->regs_win + RIO_INB_ATMU_REGS_OFFSET) - 1;
+ int size_ffs;
+ resource_size_t align;
+
+ if (flags == 0)
+ flags = (RIO_NREAD_R << 4) | RIO_NWRITE_R;
+
+ align = (size < 0x1000) ? 0x1000 : 1 << (__ilog2(size - 1) + 1);
+
+ /* Align the size */
+ if ((lstart + size) > (_ALIGN_DOWN(lstart, align) + align)) {
+ size_ffs = __ffs(_ALIGN_DOWN(lstart + size - 1, align));
+ size = 1 << (size_ffs + (((_ALIGN_DOWN(lstart, 1 << size_ffs) +
+ (1 << size_ffs)) < (lstart + size)) ? 1 : 0));
+ } else
+ size = align;
+
+ if ((lstart & (size - 1)) != (rstart & (size - 1))) {
+ dev_err(mport->dev, "The local address 0x%x can not be aligned "
+ "to the same size 0x%x with the RapidIO space "
+ "address 0x%x!\n", lstart, size, rstart);
+ return -EINVAL;
+ }
+
+ /* Search for free inbound ATMU */
+ for (i = 1;
+ (i <= RIO_MAX_INB_ATMU) && (inbatmu->riwar & RIO_ATMU_EN_MASK);
+ i++, inbatmu--)
+ ;
+
+ if (i > RIO_MAX_INB_ATMU) {
+ dev_err(mport->dev, "No free inbound ATMU!\n");
+ return -EBUSY;
+ }
+ out_be32(&inbatmu->riwtar, ((IS_64BIT_RES ? (lstart >> 32)
+ & 0xf : 0) << 20) | ((lstart >> 12) & 0xfffff));
+ out_be32(&inbatmu->riwbar, ((IS_64BIT_RES ? (rstart >> 32)
+ & 0x3 : 0) << 20) | ((rstart >> 12) & 0xfffff));
+ out_be32(&inbatmu->riwar, 0x80000000 | (0xf << 20)
+ | ((flags & 0xff) << 12)
+ | (__ilog2(size) - 1));
+ return 0;
+}
+
+/**
+ * fsl_rio_map_outb_mem -- Mapping outbound memory region.
+ * @lstart: Local memory space start address.
+ * @rstart: RapidIO space start address.
+ * @size: The mapping region size.
+ * @tid: The target RapidIO device id.
+ * @flags: Flags for mapping. 0 for using default flags.
+ *
+ * Return: 0 -- Success.
+ *
+ * This function will create the outbound mapping
+ * from lstart to rstart.
+ */
+static int fsl_rio_map_outb_mem(struct rio_mport *mport, resource_size_t lstart,
+ resource_size_t rstart, resource_size_t size,
+ u16 tid, u32 flags)
+{
+ int i;
+ struct rio_priv *priv = mport->priv;
+ struct rio_atmu_regs __iomem *outbatmu = (struct rio_atmu_regs *)
+ (priv->regs_win + RIO_ATMU_REGS_OFFSET) + 1;
+ int size_ffs;
+ resource_size_t align;
+
+ if (flags == 0)
+ flags = (RIO_NREAD << 4) | RIO_NWRITE_R;
+
+ align = (size < 0x1000) ? 0x1000 : 1 << (__ilog2(size - 1) + 1);
+
+ /* Align the size */
+ if ((lstart + size) > (_ALIGN_DOWN(lstart, align) + align)) {
+ size_ffs = __ffs(_ALIGN_DOWN(lstart + size - 1, align));
+ size = 1 << (size_ffs + (((_ALIGN_DOWN(lstart, 1 << size_ffs) +
+ (1 << size_ffs)) < (lstart + size)) ? 1 : 0));
+ } else
+ size = align;
+
+ if ((lstart & (size - 1)) != (rstart & (size - 1))) {
+ dev_err(mport->dev, "The local address 0x%x can not be aligned "
+ "to the same size 0x%x with the RapidIO space address "
+ "0x%x!\n", lstart, size, rstart);
+ return -EINVAL;
+ }
+
+ /* Search for free outbound ATMU */
+ for (i = 1;
+ (i <= RIO_MAX_OUTB_ATMU) && (outbatmu->rowar & RIO_ATMU_EN_MASK);
+ i++, outbatmu++)
+ ;
+
+ if (i > RIO_MAX_OUTB_ATMU) {
+ dev_err(mport->dev, "No free outbound ATMU!\n");
+ return -EBUSY;
+ }
+ out_be32(&outbatmu->rowtar, ((tid & 0x3ff) << 22)
+ | ((IS_64BIT_RES ? (rstart >> 32) & 0x3 : 0) << 20)
+ | ((rstart >> 12) & 0xfffff));
+ if (mport->phy_type == RIO_PHY_SERIAL)
+ out_be32(&outbatmu->rowtear, tid >> 10);
+ out_be32(&outbatmu->rowbar, ((IS_64BIT_RES ?
+ (lstart >> 32) & 0xf : 0) << 20)
+ | ((lstart >> 12) & 0xfffff));
+ out_be32(&outbatmu->rowar, 0x80000000
+ | ((flags & 0xff) << 12)
+ | (__ilog2(size) - 1));
+ return 0;
+}
+
+/**
+ * fsl_rio_unmap_inb_mem -- Unmapping inbound memory region.
+ * @lstart: Local memory space start address.
+ */
+static void fsl_rio_unmap_inb_mem(struct rio_mport *mport,
+ resource_size_t lstart)
+{
+ int i;
+ struct rio_priv *priv = mport->priv;
+ struct rio_inb_atmu_regs __iomem *inbatmu = (struct rio_inb_atmu_regs *)
+ (priv->regs_win + RIO_INB_ATMU_REGS_OFFSET) - 1;
+
+ /* Search for inbound ATMU */
+ for (i = 1; i <= RIO_MAX_INB_ATMU ; i++, inbatmu--) {
+ u32 tar = ((IS_64BIT_RES ? (lstart >> 32) & 0xf : 0) << 20)
+ | ((lstart >> 12) & 0xfffff);
+ if (inbatmu->riwtar == tar) {
+ out_be32(&inbatmu->riwar, ~(RIO_ATMU_EN_MASK));
+ return;
+ }
+ }
+}
+
+/**
+ * fsl_rio_unmap_inb_mem -- Unmapping outbound memory region.
+ * @lstart: Local memory space start address.
+ */
+static void fsl_rio_unmap_outb_mem(struct rio_mport *mport,
+ resource_size_t lstart)
+{
+ int i;
+ struct rio_priv *priv = mport->priv;
+ struct rio_atmu_regs __iomem *outbatmu = (struct rio_atmu_regs *)
+ (priv->regs_win + RIO_ATMU_REGS_OFFSET) + 1;
+
+ /* Search for outbound ATMU */
+ for (i = 1; i <= RIO_MAX_OUTB_ATMU ; i++, outbatmu++) {
+ u32 bar = ((IS_64BIT_RES ? (lstart >> 32) & 0xf : 0) << 20)
+ | ((lstart >> 12) & 0xfffff);
+ if (outbatmu->rowbar == bar) {
+ out_be32(&outbatmu->rowar, ~(RIO_ATMU_EN_MASK));
+ return;
+ }
+ }
+}
+
+/**
* rio_hw_add_outb_message - Add message to the MPC85xx outbound message queue
* @mport: Master port with outbound message queue
* @rdev: Target of outbound message
@@ -953,6 +1149,13 @@ static int fsl_rio_get_cmdline(char *s)
__setup("riohdid=", fsl_rio_get_cmdline);
+static struct rio_mem_ops fsl_mem_ops = {
+ .map_inb = fsl_rio_map_inb_mem,
+ .map_outb = fsl_rio_map_outb_mem,
+ .unmap_inb = fsl_rio_unmap_inb_mem,
+ .unmap_outb = fsl_rio_unmap_outb_mem,
+};
+
static inline void fsl_rio_info(struct device *dev, u32 ccsr)
{
const char *str;
@@ -1096,6 +1299,7 @@ int fsl_rio_setup(struct of_device *dev)
strcpy(port->name, "RIO0 mport");
port->ops = ops;
+ port->mops = &fsl_mem_ops;
port->host_deviceid = fsl_rio_get_hdid(port->id);
port->priv = priv;
--
1.5.4
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