dmaengine: Driver support for FSL RaidEngine device.
The RaidEngine is a new FSL hardware used for Raid5/6 acceration.
This patch enables the RaidEngine functionality and provides
hardware offloading capability for memcpy, xor and pq computation.
It works with async_tx.
Signed-off-by: Harninder Rai <harninder.rai@freescale.com>
Signed-off-by: Xuelin Shi <xuelin.shi@freescale.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/fsl_raid.h b/drivers/dma/fsl_raid.h
new file mode 100644
index 0000000..69d743c
--- /dev/null
+++ b/drivers/dma/fsl_raid.h
@@ -0,0 +1,306 @@
+/*
+ * drivers/dma/fsl_raid.h
+ *
+ * Freescale RAID Engine device driver
+ *
+ * Author:
+ * Harninder Rai <harninder.rai@freescale.com>
+ * Naveen Burmi <naveenburmi@freescale.com>
+ *
+ * Rewrite:
+ * Xuelin Shi <xuelin.shi@freescale.com>
+
+ * Copyright (c) 2010-2012 Freescale Semiconductor, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of Freescale Semiconductor nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#define FSL_RE_MAX_CHANS 4
+#define FSL_RE_DPAA_MODE BIT(30)
+#define FSL_RE_NON_DPAA_MODE BIT(31)
+#define FSL_RE_GFM_POLY 0x1d000000
+#define FSL_RE_ADD_JOB(x) ((x) << 16)
+#define FSL_RE_RMVD_JOB(x) ((x) << 16)
+#define FSL_RE_CFG1_CBSI 0x08000000
+#define FSL_RE_CFG1_CBS0 0x00080000
+#define FSL_RE_SLOT_FULL_SHIFT 8
+#define FSL_RE_SLOT_FULL(x) ((x) >> FSL_RE_SLOT_FULL_SHIFT)
+#define FSL_RE_SLOT_AVAIL_SHIFT 8
+#define FSL_RE_SLOT_AVAIL(x) ((x) >> FSL_RE_SLOT_AVAIL_SHIFT)
+#define FSL_RE_PQ_OPCODE 0x1B
+#define FSL_RE_XOR_OPCODE 0x1A
+#define FSL_RE_MOVE_OPCODE 0x8
+#define FSL_RE_FRAME_ALIGN 16
+#define FSL_RE_BLOCK_SIZE 0x3 /* 4096 bytes */
+#define FSL_RE_CACHEABLE_IO 0x0
+#define FSL_RE_BUFFER_OUTPUT 0x0
+#define FSL_RE_INTR_ON_ERROR 0x1
+#define FSL_RE_DATA_DEP 0x1
+#define FSL_RE_ENABLE_DPI 0x0
+#define FSL_RE_RING_SIZE 0x400
+#define FSL_RE_RING_SIZE_MASK (FSL_RE_RING_SIZE - 1)
+#define FSL_RE_RING_SIZE_SHIFT 8
+#define FSL_RE_ADDR_BIT_SHIFT 4
+#define FSL_RE_ADDR_BIT_MASK (BIT(FSL_RE_ADDR_BIT_SHIFT) - 1)
+#define FSL_RE_ERROR 0x40000000
+#define FSL_RE_INTR 0x80000000
+#define FSL_RE_CLR_INTR 0x80000000
+#define FSL_RE_PAUSE 0x80000000
+#define FSL_RE_ENABLE 0x80000000
+#define FSL_RE_REG_LIODN_MASK 0x00000FFF
+
+#define FSL_RE_CDB_OPCODE_MASK 0xF8000000
+#define FSL_RE_CDB_OPCODE_SHIFT 27
+#define FSL_RE_CDB_EXCLEN_MASK 0x03000000
+#define FSL_RE_CDB_EXCLEN_SHIFT 24
+#define FSL_RE_CDB_EXCLQ1_MASK 0x00F00000
+#define FSL_RE_CDB_EXCLQ1_SHIFT 20
+#define FSL_RE_CDB_EXCLQ2_MASK 0x000F0000
+#define FSL_RE_CDB_EXCLQ2_SHIFT 16
+#define FSL_RE_CDB_BLKSIZE_MASK 0x0000C000
+#define FSL_RE_CDB_BLKSIZE_SHIFT 14
+#define FSL_RE_CDB_CACHE_MASK 0x00003000
+#define FSL_RE_CDB_CACHE_SHIFT 12
+#define FSL_RE_CDB_BUFFER_MASK 0x00000800
+#define FSL_RE_CDB_BUFFER_SHIFT 11
+#define FSL_RE_CDB_ERROR_MASK 0x00000400
+#define FSL_RE_CDB_ERROR_SHIFT 10
+#define FSL_RE_CDB_NRCS_MASK 0x0000003C
+#define FSL_RE_CDB_NRCS_SHIFT 6
+#define FSL_RE_CDB_DEPEND_MASK 0x00000008
+#define FSL_RE_CDB_DEPEND_SHIFT 3
+#define FSL_RE_CDB_DPI_MASK 0x00000004
+#define FSL_RE_CDB_DPI_SHIFT 2
+
+/*
+ * the largest cf block is 19*sizeof(struct cmpnd_frame), which is 304 bytes.
+ * here 19 = 1(cdb)+2(dest)+16(src), align to 64bytes, that is 320 bytes.
+ * the largest cdb block: struct pq_cdb which is 180 bytes, adding to cf block
+ * 320+180=500, align to 64bytes, that is 512 bytes.
+ */
+#define FSL_RE_CF_DESC_SIZE 320
+#define FSL_RE_CF_CDB_SIZE 512
+#define FSL_RE_CF_CDB_ALIGN 64
+
+struct fsl_re_ctrl {
+ /* General Configuration Registers */
+ __be32 global_config; /* Global Configuration Register */
+ u8 rsvd1[4];
+ __be32 galois_field_config; /* Galois Field Configuration Register */
+ u8 rsvd2[4];
+ __be32 jq_wrr_config; /* WRR Configuration register */
+ u8 rsvd3[4];
+ __be32 crc_config; /* CRC Configuration register */
+ u8 rsvd4[228];
+ __be32 system_reset; /* System Reset Register */
+ u8 rsvd5[252];
+ __be32 global_status; /* Global Status Register */
+ u8 rsvd6[832];
+ __be32 re_liodn_base; /* LIODN Base Register */
+ u8 rsvd7[1712];
+ __be32 re_version_id; /* Version ID register of RE */
+ __be32 re_version_id_2; /* Version ID 2 register of RE */
+ u8 rsvd8[512];
+ __be32 host_config; /* Host I/F Configuration Register */
+};
+
+struct fsl_re_chan_cfg {
+ /* Registers for JR interface */
+ __be32 jr_config_0; /* Job Queue Configuration 0 Register */
+ __be32 jr_config_1; /* Job Queue Configuration 1 Register */
+ __be32 jr_interrupt_status; /* Job Queue Interrupt Status Register */
+ u8 rsvd1[4];
+ __be32 jr_command; /* Job Queue Command Register */
+ u8 rsvd2[4];
+ __be32 jr_status; /* Job Queue Status Register */
+ u8 rsvd3[228];
+
+ /* Input Ring */
+ __be32 inbring_base_h; /* Inbound Ring Base Address Register - High */
+ __be32 inbring_base_l; /* Inbound Ring Base Address Register - Low */
+ __be32 inbring_size; /* Inbound Ring Size Register */
+ u8 rsvd4[4];
+ __be32 inbring_slot_avail; /* Inbound Ring Slot Available Register */
+ u8 rsvd5[4];
+ __be32 inbring_add_job; /* Inbound Ring Add Job Register */
+ u8 rsvd6[4];
+ __be32 inbring_cnsmr_indx; /* Inbound Ring Consumer Index Register */
+ u8 rsvd7[220];
+
+ /* Output Ring */
+ __be32 oubring_base_h; /* Outbound Ring Base Address Register - High */
+ __be32 oubring_base_l; /* Outbound Ring Base Address Register - Low */
+ __be32 oubring_size; /* Outbound Ring Size Register */
+ u8 rsvd8[4];
+ __be32 oubring_job_rmvd; /* Outbound Ring Job Removed Register */
+ u8 rsvd9[4];
+ __be32 oubring_slot_full; /* Outbound Ring Slot Full Register */
+ u8 rsvd10[4];
+ __be32 oubring_prdcr_indx; /* Outbound Ring Producer Index */
+};
+
+/*
+ * Command Descriptor Block (CDB) for unicast move command.
+ * In RAID Engine terms, memcpy is done through move command
+ */
+struct fsl_re_move_cdb {
+ __be32 cdb32;
+};
+
+/* Data protection/integrity related fields */
+#define FSL_RE_DPI_APPS_MASK 0xC0000000
+#define FSL_RE_DPI_APPS_SHIFT 30
+#define FSL_RE_DPI_REF_MASK 0x30000000
+#define FSL_RE_DPI_REF_SHIFT 28
+#define FSL_RE_DPI_GUARD_MASK 0x0C000000
+#define FSL_RE_DPI_GUARD_SHIFT 26
+#define FSL_RE_DPI_ATTR_MASK 0x03000000
+#define FSL_RE_DPI_ATTR_SHIFT 24
+#define FSL_RE_DPI_META_MASK 0x0000FFFF
+
+struct fsl_re_dpi {
+ __be32 dpi32;
+ __be32 ref;
+};
+
+/*
+ * CDB for GenQ command. In RAID Engine terminology, XOR is
+ * done through this command
+ */
+struct fsl_re_xor_cdb {
+ __be32 cdb32;
+ u8 gfm[16];
+ struct fsl_re_dpi dpi_dest_spec;
+ struct fsl_re_dpi dpi_src_spec[16];
+};
+
+/* CDB for no-op command */
+struct fsl_re_noop_cdb {
+ __be32 cdb32;
+};
+
+/*
+ * CDB for GenQQ command. In RAID Engine terminology, P/Q is
+ * done through this command
+ */
+struct fsl_re_pq_cdb {
+ __be32 cdb32;
+ u8 gfm_q1[16];
+ u8 gfm_q2[16];
+ struct fsl_re_dpi dpi_dest_spec[2];
+ struct fsl_re_dpi dpi_src_spec[16];
+};
+
+/* Compound frame */
+#define FSL_RE_CF_ADDR_HIGH_MASK 0x000000FF
+#define FSL_RE_CF_EXT_MASK 0x80000000
+#define FSL_RE_CF_EXT_SHIFT 31
+#define FSL_RE_CF_FINAL_MASK 0x40000000
+#define FSL_RE_CF_FINAL_SHIFT 30
+#define FSL_RE_CF_LENGTH_MASK 0x000FFFFF
+#define FSL_RE_CF_BPID_MASK 0x00FF0000
+#define FSL_RE_CF_BPID_SHIFT 16
+#define FSL_RE_CF_OFFSET_MASK 0x00001FFF
+
+struct fsl_re_cmpnd_frame {
+ __be32 addr_high;
+ __be32 addr_low;
+ __be32 efrl32;
+ __be32 rbro32;
+};
+
+/* Frame descriptor */
+#define FSL_RE_HWDESC_LIODN_MASK 0x3F000000
+#define FSL_RE_HWDESC_LIODN_SHIFT 24
+#define FSL_RE_HWDESC_BPID_MASK 0x00FF0000
+#define FSL_RE_HWDESC_BPID_SHIFT 16
+#define FSL_RE_HWDESC_ELIODN_MASK 0x0000F000
+#define FSL_RE_HWDESC_ELIODN_SHIFT 12
+#define FSL_RE_HWDESC_FMT_SHIFT 29
+#define FSL_RE_HWDESC_FMT_MASK (0x3 << FSL_RE_HWDESC_FMT_SHIFT)
+
+struct fsl_re_hw_desc {
+ __be32 lbea32;
+ __be32 addr_low;
+ __be32 fmt32;
+ __be32 status;
+};
+
+/* Raid Engine device private data */
+struct fsl_re_drv_private {
+ u8 total_chans;
+ struct dma_device dma_dev;
+ struct fsl_re_ctrl *re_regs;
+ struct fsl_re_chan *re_jrs[FSL_RE_MAX_CHANS];
+ struct dma_pool *cf_desc_pool;
+ struct dma_pool *hw_desc_pool;
+};
+
+/* Per job ring data structure */
+struct fsl_re_chan {
+ char name[16];
+ spinlock_t desc_lock; /* queue lock */
+ struct list_head ack_q; /* wait to acked queue */
+ struct list_head active_q; /* already issued on hw, not completed */
+ struct list_head submit_q;
+ struct list_head free_q; /* alloc available queue */
+ struct device *dev;
+ struct fsl_re_drv_private *re_dev;
+ struct dma_chan chan;
+ struct fsl_re_chan_cfg *jrregs;
+ int irq;
+ struct tasklet_struct irqtask;
+ u32 alloc_count;
+
+ /* hw descriptor ring for inbound queue*/
+ dma_addr_t inb_phys_addr;
+ struct fsl_re_hw_desc *inb_ring_virt_addr;
+ u32 inb_count;
+
+ /* hw descriptor ring for outbound queue */
+ dma_addr_t oub_phys_addr;
+ struct fsl_re_hw_desc *oub_ring_virt_addr;
+ u32 oub_count;
+};
+
+/* Async transaction descriptor */
+struct fsl_re_desc {
+ struct dma_async_tx_descriptor async_tx;
+ struct list_head node;
+ struct fsl_re_hw_desc hwdesc;
+ struct fsl_re_chan *re_chan;
+
+ /* hwdesc will point to cf_addr */
+ void *cf_addr;
+ dma_addr_t cf_paddr;
+
+ void *cdb_addr;
+ dma_addr_t cdb_paddr;
+ int status;
+};