crypto: nx - add PowerNV platform NX-842 driver
Add driver for NX-842 hardware on the PowerNV platform.
This allows the use of the 842 compression hardware coprocessor on
the PowerNV platform.
Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/crypto/nx/nx-842.h b/drivers/crypto/nx/nx-842.h
index c6ceb0f..84b15b7 100644
--- a/drivers/crypto/nx/nx-842.h
+++ b/drivers/crypto/nx/nx-842.h
@@ -5,9 +5,104 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/nx842.h>
+#include <linux/sw842.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <linux/io.h>
+#include <linux/mm.h>
+#include <linux/ratelimit.h>
+
+/* Restrictions on Data Descriptor List (DDL) and Entry (DDE) buffers
+ *
+ * From NX P8 workbook, sec 4.9.1 "842 details"
+ * Each DDE buffer is 128 byte aligned
+ * Each DDE buffer size is a multiple of 32 bytes (except the last)
+ * The last DDE buffer size is a multiple of 8 bytes
+ */
+#define DDE_BUFFER_ALIGN (128)
+#define DDE_BUFFER_SIZE_MULT (32)
+#define DDE_BUFFER_LAST_MULT (8)
+
+/* Arbitrary DDL length limit
+ * Allows max buffer size of MAX-1 to MAX pages
+ * (depending on alignment)
+ */
+#define DDL_LEN_MAX (17)
+
+/* CCW 842 CI/FC masks
+ * NX P8 workbook, section 4.3.1, figure 4-6
+ * "CI/FC Boundary by NX CT type"
+ */
+#define CCW_CI_842 (0x00003ff8)
+#define CCW_FC_842 (0x00000007)
+
+/* CCW Function Codes (FC) for 842
+ * NX P8 workbook, section 4.9, table 4-28
+ * "Function Code Definitions for 842 Memory Compression"
+ */
+#define CCW_FC_842_COMP_NOCRC (0)
+#define CCW_FC_842_COMP_CRC (1)
+#define CCW_FC_842_DECOMP_NOCRC (2)
+#define CCW_FC_842_DECOMP_CRC (3)
+#define CCW_FC_842_MOVE (4)
+
+/* CSB CC Error Types for 842
+ * NX P8 workbook, section 4.10.3, table 4-30
+ * "Reported Error Types Summary Table"
+ */
+/* These are all duplicates of existing codes defined in icswx.h. */
+#define CSB_CC_TRANSLATION_DUP1 (80)
+#define CSB_CC_TRANSLATION_DUP2 (82)
+#define CSB_CC_TRANSLATION_DUP3 (84)
+#define CSB_CC_TRANSLATION_DUP4 (86)
+#define CSB_CC_TRANSLATION_DUP5 (92)
+#define CSB_CC_TRANSLATION_DUP6 (94)
+#define CSB_CC_PROTECTION_DUP1 (81)
+#define CSB_CC_PROTECTION_DUP2 (83)
+#define CSB_CC_PROTECTION_DUP3 (85)
+#define CSB_CC_PROTECTION_DUP4 (87)
+#define CSB_CC_PROTECTION_DUP5 (93)
+#define CSB_CC_PROTECTION_DUP6 (95)
+#define CSB_CC_RD_EXTERNAL_DUP1 (89)
+#define CSB_CC_RD_EXTERNAL_DUP2 (90)
+#define CSB_CC_RD_EXTERNAL_DUP3 (91)
+/* These are specific to NX */
+/* 842 codes */
+#define CSB_CC_TPBC_GT_SPBC (64) /* no error, but >1 comp ratio */
+#define CSB_CC_CRC_MISMATCH (65) /* decomp crc mismatch */
+#define CSB_CC_TEMPL_INVALID (66) /* decomp invalid template value */
+#define CSB_CC_TEMPL_OVERFLOW (67) /* decomp template shows data after end */
+/* sym crypt codes */
+#define CSB_CC_DECRYPT_OVERFLOW (64)
+/* asym crypt codes */
+#define CSB_CC_MINV_OVERFLOW (128)
+/* These are reserved for hypervisor use */
+#define CSB_CC_HYP_RESERVE_START (240)
+#define CSB_CC_HYP_RESERVE_END (253)
+#define CSB_CC_HYP_NO_HW (254)
+#define CSB_CC_HYP_HANG_ABORTED (255)
+
+/* CCB Completion Modes (CM) for 842
+ * NX P8 workbook, section 4.3, figure 4-5
+ * "CRB Details - Normal Cop_Req (CL=00, C=1)"
+ */
+#define CCB_CM_EXTRA_WRITE (CCB_CM0_ALL_COMPLETIONS & CCB_CM12_STORE)
+#define CCB_CM_INTERRUPT (CCB_CM0_ALL_COMPLETIONS & CCB_CM12_INTERRUPT)
+
+#define LEN_ON_PAGE(pa) (PAGE_SIZE - ((pa) & ~PAGE_MASK))
+
+static inline unsigned long nx842_get_pa(void *addr)
+{
+ if (!is_vmalloc_addr(addr))
+ return __pa(addr);
+
+ return page_to_phys(vmalloc_to_page(addr)) + offset_in_page(addr);
+}
+
+/* Get/Set bit fields */
+#define MASK_LSH(m) (__builtin_ffsl(m) - 1)
+#define GET_FIELD(v, m) (((v) & (m)) >> MASK_LSH(m))
+#define SET_FIELD(v, m, val) (((v) & ~(m)) | (((val) << MASK_LSH(m)) & (m)))
struct nx842_driver {
struct module *owner;
@@ -27,6 +122,8 @@
/* To allow the main nx-compress module to load platform module */
+#define NX842_POWERNV_MODULE_NAME "nx-compress-powernv"
+#define NX842_POWERNV_COMPAT_NAME "ibm,power-nx"
#define NX842_PSERIES_MODULE_NAME "nx-compress-pseries"
#define NX842_PSERIES_COMPAT_NAME "ibm,compression"