crypto: caam - Add support for the Freescale SEC4/CAAM

The SEC4 supercedes the SEC2.x/3.x as Freescale's
Integrated Security Engine.  Its programming model is
incompatible with all prior versions of the SEC (talitos).

The SEC4 is also known as the Cryptographic Accelerator
and Assurance Module (CAAM); this driver is named caam.

This initial submission does not include support for Data Path
mode operation - AEAD descriptors are submitted via the job
ring interface, while the Queue Interface (QI) is enabled
for use by others.  Only AEAD algorithms are implemented
at this time, for use with IPsec.

Many thanks to the Freescale STC team for their contributions
to this driver.

Signed-off-by: Steve Cornelius <sec@pobox.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 409 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/crypto/fsl-sec4.txt b/Documentation/devicetree/bindings/crypto/fsl-sec4.txt
new file mode 100644
index 000000000000..fce16a85e2c5
--- /dev/null
+++ b/Documentation/devicetree/bindings/crypto/fsl-sec4.txt
@@ -0,0 +1,409 @@
+=====================================================================
+SEC 4 Device Tree Binding
+Copyright (C) 2008-2011 Freescale Semiconductor Inc.
+
+ CONTENTS
+   -Overview
+   -SEC 4 Node
+   -Job Ring Node
+   -Run Time Integrity Check (RTIC) Node
+   -Run Time Integrity Check (RTIC) Memory Node
+   -Secure Non-Volatile Storage (SNVS) Node
+   -Full Example
+
+NOTE: the SEC 4 is also known as Freescale's Cryptographic Accelerator
+Accelerator and Assurance Module (CAAM).
+
+=====================================================================
+Overview
+
+DESCRIPTION
+
+SEC 4 h/w can process requests from 2 types of sources.
+1. DPAA Queue Interface (HW interface between Queue Manager & SEC 4).
+2. Job Rings (HW interface between cores & SEC 4 registers).
+
+High Speed Data Path Configuration:
+
+HW interface between QM & SEC 4 and also BM & SEC 4, on DPAA-enabled parts
+such as the P4080.  The number of simultaneous dequeues the QI can make is
+equal to the number of Descriptor Controller (DECO) engines in a particular
+SEC version.  E.g., the SEC 4.0 in the P4080 has 5 DECOs and can thus
+dequeue from 5 subportals simultaneously.
+
+Job Ring Data Path Configuration:
+
+Each JR is located on a separate 4k page, they may (or may not) be made visible
+in the memory partition devoted to a particular core.  The P4080 has 4 JRs, so
+up to 4 JRs can be configured; and all 4 JRs process requests in parallel.
+
+=====================================================================
+P4080 SEC 4 Node
+
+Description
+
+    Node defines the base address of the SEC 4 block.
+    This block specifies the address range of all global
+    configuration registers for the SEC 4 block.  It
+    also receives interrupts from the Run Time Integrity Check
+    (RTIC) function within the SEC 4 block.
+
+PROPERTIES
+
+   - compatible
+      Usage: required
+      Value type: <string>
+      Definition: Must include "fsl,p4080-sec4.0","fsl,sec-4.0"
+
+   - #address-cells
+       Usage: required
+       Value type: <u32>
+       Definition: A standard property.  Defines the number of cells
+           for representing physical addresses in child nodes.
+
+   - #size-cells
+       Usage: required
+       Value type: <u32>
+       Definition: A standard property.  Defines the number of cells
+           for representing the size of physical addresses in
+           child nodes.
+
+   - reg
+      Usage: required
+      Value type: <prop-encoded-array>
+      Definition: A standard property.  Specifies the physical
+          address and length of the SEC4.0 configuration registers.
+          registers
+
+   - ranges
+       Usage: required
+       Value type: <prop-encoded-array>
+       Definition: A standard property.  Specifies the physical address
+           range of the SEC 4.0 register space (-SNVS not included).  A
+           triplet that includes the child address, parent address, &
+           length.
+
+   - interrupts
+      Usage: required
+      Value type: <prop_encoded-array>
+      Definition:  Specifies the interrupts generated by this
+           device.  The value of the interrupts property
+           consists of one interrupt specifier. The format
+           of the specifier is defined by the binding document
+           describing the node's interrupt parent.
+
+   - interrupt-parent
+      Usage: (required if interrupt property is defined)
+      Value type: <phandle>
+      Definition: A single <phandle> value that points
+          to the interrupt parent to which the child domain
+          is being mapped.
+
+   Note: All other standard properties (see the ePAPR) are allowed
+   but are optional.
+
+
+EXAMPLE
+	crypto@300000 {
+		compatible = "fsl,p4080-sec4.0", "fsl,sec4.0";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		reg = <0x300000 0x10000>;
+		ranges = <0 0x300000 0x10000>;
+		interrupt-parent = <&mpic>;
+		interrupts = <92 2>;
+	};
+
+=====================================================================
+P4080 Job Ring (JR) Node
+
+    Child of the crypto node defines data processing interface to SEC 4
+    across the peripheral bus for purposes of processing
+    cryptographic descriptors. The specified address
+    range can be made visible to one (or more) cores.
+    The interrupt defined for this node is controlled within
+    the address range of this node.
+
+  - compatible
+      Usage: required
+      Value type: <string>
+      Definition: Must include "fsl,p4080-sec4.0-job-ring","fsl,sec4.0-job-ring"
+
+  - reg
+      Usage: required
+      Value type: <prop-encoded-array>
+      Definition: Specifies a two JR parameters:  an offset from
+          the parent physical address and the length the JR registers.
+
+   - fsl,liodn
+       Usage: optional-but-recommended
+       Value type: <prop-encoded-array>
+       Definition:
+           Specifies the LIODN to be used in conjunction with
+           the ppid-to-liodn table that specifies the PPID to LIODN mapping.
+           Needed if the PAMU is used.  Value is a 12 bit value
+           where value is a LIODN ID for this JR. This property is
+           normally set by boot firmware.
+
+   - interrupts
+      Usage: required
+      Value type: <prop_encoded-array>
+      Definition:  Specifies the interrupts generated by this
+           device.  The value of the interrupts property
+           consists of one interrupt specifier. The format
+           of the specifier is defined by the binding document
+           describing the node's interrupt parent.
+
+   - interrupt-parent
+      Usage: (required if interrupt property is defined)
+      Value type: <phandle>
+      Definition: A single <phandle> value that points
+          to the interrupt parent to which the child domain
+          is being mapped.
+
+EXAMPLE
+	jr@1000 {
+		compatible = "fsl,p4080-sec4.0-job-ring",
+			     "fsl,sec4.0-job-ring";
+		reg = <0x1000 0x1000>;
+		fsl,liodn = <0x081>;
+		interrupt-parent = <&mpic>;
+		interrupts = <88 2>;
+	};
+
+
+=====================================================================
+P4080 Run Time Integrity Check (RTIC) Node
+
+  Child node of the crypto node.  Defines a register space that
+  contains up to 5 sets of addresses and their lengths (sizes) that
+  will be checked at run time.  After an initial hash result is
+  calculated, these addresses are checked by HW to monitor any
+  change.  If any memory is modified, a Security Violation is
+  triggered (see SNVS definition).
+
+
+  - compatible
+      Usage: required
+      Value type: <string>
+      Definition: Must include "fsl,p4080-sec4.0-rtic","fsl,sec4.0-rtic".
+
+   - #address-cells
+       Usage: required
+       Value type: <u32>
+       Definition: A standard property.  Defines the number of cells
+           for representing physical addresses in child nodes.  Must
+           have a value of 1.
+
+   - #size-cells
+       Usage: required
+       Value type: <u32>
+       Definition: A standard property.  Defines the number of cells
+           for representing the size of physical addresses in
+           child nodes.  Must have a value of 1.
+
+  - reg
+      Usage: required
+      Value type: <prop-encoded-array>
+      Definition: A standard property.  Specifies a two parameters:
+          an offset from the parent physical address and the length
+          the SEC4 registers.
+
+   - ranges
+       Usage: required
+       Value type: <prop-encoded-array>
+       Definition: A standard property.  Specifies the physical address
+           range of the SEC 4 register space (-SNVS not included).  A
+           triplet that includes the child address, parent address, &
+           length.
+
+EXAMPLE
+	rtic@6000 {
+		compatible = "fsl,p4080-sec4.0-rtic",
+			     "fsl,sec4.0-rtic";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		reg = <0x6000 0x100>;
+		ranges = <0x0 0x6100 0xe00>;
+	};
+
+=====================================================================
+P4080 Run Time Integrity Check (RTIC) Memory Node
+  A child node that defines individual RTIC memory regions that are used to
+  perform run-time integrity check of memory areas that should not modified.
+  The node defines a register that contains the memory address &
+  length (combined) and a second register that contains the hash result
+  in big endian format.
+
+  - compatible
+      Usage: required
+      Value type: <string>
+      Definition: Must include "fsl,p4080-sec4.0-rtic-memory","fsl,sec4.0-rtic-memory".
+
+  - reg
+      Usage: required
+      Value type: <prop-encoded-array>
+      Definition: A standard property.  Specifies two parameters:
+          an offset from the parent physical address and the length:
+
+          1. The location of the RTIC memory address & length registers.
+          2. The location RTIC hash result.
+
+  - fsl,rtic-region
+       Usage: optional-but-recommended
+       Value type: <prop-encoded-array>
+       Definition:
+           Specifies the HW address (36 bit address) for this region
+           followed by the length of the HW partition to be checked;
+           the address is represented as a 64 bit quantity followed
+           by a 32 bit length.
+
+   - fsl,liodn
+       Usage: optional-but-recommended
+       Value type: <prop-encoded-array>
+       Definition:
+           Specifies the LIODN to be used in conjunction with
+           the ppid-to-liodn table that specifies the PPID to LIODN
+           mapping.  Needed if the PAMU is used.  Value is a 12 bit value
+           where value is a LIODN ID for this RTIC memory region. This
+           property is normally set by boot firmware.
+
+EXAMPLE
+	rtic-a@0 {
+		compatible = "fsl,p4080-sec4.0-rtic-memory",
+			     "fsl,sec4.0-rtic-memory";
+		reg = <0x00 0x20 0x100 0x80>;
+		fsl,liodn   = <0x03c>;
+		fsl,rtic-region  = <0x12345678 0x12345678 0x12345678>;
+	};
+
+=====================================================================
+P4080 Secure Non-Volatile Storage (SNVS) Node
+
+    Node defines address range and the associated
+    interrupt for the SNVS function.  This function
+    monitors security state information & reports
+    security violations.
+
+  - compatible
+      Usage: required
+      Value type: <string>
+      Definition: Must include "fsl,p4080-sec4.0-mon", "fsl,sec4.0-mon".
+
+  - reg
+      Usage: required
+      Value type: <prop-encoded-array>
+      Definition: A standard property.  Specifies the physical
+          address and length of the SEC4 configuration
+          registers.
+
+   - interrupts
+      Usage: required
+      Value type: <prop_encoded-array>
+      Definition:  Specifies the interrupts generated by this
+           device.  The value of the interrupts property
+           consists of one interrupt specifier. The format
+           of the specifier is defined by the binding document
+           describing the node's interrupt parent.
+
+   - interrupt-parent
+      Usage: (required if interrupt property is defined)
+      Value type: <phandle>
+      Definition: A single <phandle> value that points
+          to the interrupt parent to which the child domain
+          is being mapped.
+
+EXAMPLE
+	sec_mon@314000 {
+		compatible = "fsl,p4080-sec4.0-mon", "fsl,sec4.0-mon";
+		reg = <0x314000 0x1000>;
+		interrupt-parent = <&mpic>;
+		interrupts = <93 2>;
+	};
+
+=====================================================================
+FULL EXAMPLE
+
+	crypto: crypto@300000 {
+		compatible = "fsl,p4080-sec4.0", "fsl,sec4.0";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		reg = <0x300000 0x10000>;
+		ranges = <0 0x300000 0x10000>;
+		interrupt-parent = <&mpic>;
+		interrupts = <92 2>;
+
+		sec_jr0: jr@1000 {
+			compatible = "fsl,p4080-sec4.0-job-ring",
+				     "fsl,sec4.0-job-ring";
+			reg = <0x1000 0x1000>;
+			interrupt-parent = <&mpic>;
+			interrupts = <88 2>;
+		};
+
+		sec_jr1: jr@2000 {
+			compatible = "fsl,p4080-sec4.0-job-ring",
+				     "fsl,sec4.0-job-ring";
+			reg = <0x2000 0x1000>;
+			interrupt-parent = <&mpic>;
+			interrupts = <89 2>;
+		};
+
+		sec_jr2: jr@3000 {
+			compatible = "fsl,p4080-sec4.0-job-ring",
+				     "fsl,sec4.0-job-ring";
+			reg = <0x3000 0x1000>;
+			interrupt-parent = <&mpic>;
+			interrupts = <90 2>;
+		};
+
+		sec_jr3: jr@4000 {
+			compatible = "fsl,p4080-sec4.0-job-ring",
+				     "fsl,sec4.0-job-ring";
+			reg = <0x4000 0x1000>;
+			interrupt-parent = <&mpic>;
+			interrupts = <91 2>;
+		};
+
+		rtic@6000 {
+			compatible = "fsl,p4080-sec4.0-rtic",
+				     "fsl,sec4.0-rtic";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			reg = <0x6000 0x100>;
+			ranges = <0x0 0x6100 0xe00>;
+
+			rtic_a: rtic-a@0 {
+				compatible = "fsl,p4080-sec4.0-rtic-memory",
+					     "fsl,sec4.0-rtic-memory";
+				reg = <0x00 0x20 0x100 0x80>;
+			};
+
+			rtic_b: rtic-b@20 {
+				compatible = "fsl,p4080-sec4.0-rtic-memory",
+					     "fsl,sec4.0-rtic-memory";
+				reg = <0x20 0x20 0x200 0x80>;
+			};
+
+			rtic_c: rtic-c@40 {
+				compatible = "fsl,p4080-sec4.0-rtic-memory",
+					     "fsl,sec4.0-rtic-memory";
+				reg = <0x40 0x20 0x300 0x80>;
+			};
+
+			rtic_d: rtic-d@60 {
+				compatible = "fsl,p4080-sec4.0-rtic-memory",
+					     "fsl,sec4.0-rtic-memory";
+				reg = <0x60 0x20 0x500 0x80>;
+			};
+		};
+	};
+
+	sec_mon: sec_mon@314000 {
+		compatible = "fsl,p4080-sec4.0-mon", "fsl,sec4.0-mon";
+		reg = <0x314000 0x1000>;
+		interrupt-parent = <&mpic>;
+		interrupts = <93 2>;
+	};
+
+=====================================================================