3 * acard-ahci.c - ACard AHCI SATA support
5 * Maintained by: Tejun Heo <tj@kernel.org>
6 * Please ALWAYS copy linux-ide@vger.kernel.org
9 * Copyright 2010 Red Hat, Inc.
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * AHCI hardware documentation:
31 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
32 * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/pci.h>
39 #include <linux/init.h>
40 #include <linux/blkdev.h>
41 #include <linux/delay.h>
42 #include <linux/interrupt.h>
43 #include <linux/dma-mapping.h>
44 #include <linux/device.h>
45 #include <linux/dmi.h>
46 #include <linux/gfp.h>
47 #include <scsi/scsi_host.h>
48 #include <scsi/scsi_cmnd.h>
49 #include <linux/libata.h>
52 #define DRV_NAME "acard-ahci"
53 #define DRV_VERSION "1.0"
56 Received FIS structure limited to 80h.
59 #define ACARD_AHCI_RX_FIS_SZ 128
73 __le32 size; /* bit 31 (EOT) max==0x10000 (64k) */
76 static void acard_ahci_qc_prep(struct ata_queued_cmd *qc);
77 static bool acard_ahci_qc_fill_rtf(struct ata_queued_cmd *qc);
78 static int acard_ahci_port_start(struct ata_port *ap);
79 static int acard_ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
82 static int acard_ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
83 static int acard_ahci_pci_device_resume(struct pci_dev *pdev);
86 static struct scsi_host_template acard_ahci_sht = {
87 AHCI_SHT("acard-ahci"),
90 static struct ata_port_operations acard_ops = {
91 .inherits = &ahci_ops,
92 .qc_prep = acard_ahci_qc_prep,
93 .qc_fill_rtf = acard_ahci_qc_fill_rtf,
94 .port_start = acard_ahci_port_start,
97 #define AHCI_HFLAGS(flags) .private_data = (void *)(flags)
99 static const struct ata_port_info acard_ahci_port_info[] = {
102 AHCI_HFLAGS (AHCI_HFLAG_NO_NCQ),
103 .flags = AHCI_FLAG_COMMON,
104 .pio_mask = ATA_PIO4,
105 .udma_mask = ATA_UDMA6,
106 .port_ops = &acard_ops,
110 static const struct pci_device_id acard_ahci_pci_tbl[] = {
112 { PCI_VDEVICE(ARTOP, 0x000d), board_acard_ahci }, /* ATP8620 */
114 { } /* terminate list */
117 static struct pci_driver acard_ahci_pci_driver = {
119 .id_table = acard_ahci_pci_tbl,
120 .probe = acard_ahci_init_one,
121 .remove = ata_pci_remove_one,
123 .suspend = acard_ahci_pci_device_suspend,
124 .resume = acard_ahci_pci_device_resume,
129 static int acard_ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
131 struct ata_host *host = pci_get_drvdata(pdev);
132 struct ahci_host_priv *hpriv = host->private_data;
133 void __iomem *mmio = hpriv->mmio;
136 if (mesg.event & PM_EVENT_SUSPEND &&
137 hpriv->flags & AHCI_HFLAG_NO_SUSPEND) {
139 "BIOS update required for suspend/resume\n");
143 if (mesg.event & PM_EVENT_SLEEP) {
144 /* AHCI spec rev1.1 section 8.3.3:
145 * Software must disable interrupts prior to requesting a
146 * transition of the HBA to D3 state.
148 ctl = readl(mmio + HOST_CTL);
150 writel(ctl, mmio + HOST_CTL);
151 readl(mmio + HOST_CTL); /* flush */
154 return ata_pci_device_suspend(pdev, mesg);
157 static int acard_ahci_pci_device_resume(struct pci_dev *pdev)
159 struct ata_host *host = pci_get_drvdata(pdev);
162 rc = ata_pci_device_do_resume(pdev);
166 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
167 rc = ahci_reset_controller(host);
171 ahci_init_controller(host);
174 ata_host_resume(host);
180 static int acard_ahci_configure_dma_masks(struct pci_dev *pdev, int using_dac)
185 !pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
186 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
188 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
191 "64-bit DMA enable failed\n");
196 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
198 dev_err(&pdev->dev, "32-bit DMA enable failed\n");
201 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
204 "32-bit consistent DMA enable failed\n");
211 static void acard_ahci_pci_print_info(struct ata_host *host)
213 struct pci_dev *pdev = to_pci_dev(host->dev);
217 pci_read_config_word(pdev, 0x0a, &cc);
218 if (cc == PCI_CLASS_STORAGE_IDE)
220 else if (cc == PCI_CLASS_STORAGE_SATA)
222 else if (cc == PCI_CLASS_STORAGE_RAID)
227 ahci_print_info(host, scc_s);
230 static unsigned int acard_ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
232 struct scatterlist *sg;
233 struct acard_sg *acard_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
234 unsigned int si, last_si = 0;
239 * Next, the S/G list.
241 for_each_sg(qc->sg, sg, qc->n_elem, si) {
242 dma_addr_t addr = sg_dma_address(sg);
243 u32 sg_len = sg_dma_len(sg);
247 * We must set an end-of-table (EOT) bit,
248 * and the segment cannot exceed 64k (0x10000)
250 acard_sg[si].addr = cpu_to_le32(addr & 0xffffffff);
251 acard_sg[si].addr_hi = cpu_to_le32((addr >> 16) >> 16);
252 acard_sg[si].size = cpu_to_le32(sg_len);
256 acard_sg[last_si].size |= cpu_to_le32(1 << 31); /* set EOT */
261 static void acard_ahci_qc_prep(struct ata_queued_cmd *qc)
263 struct ata_port *ap = qc->ap;
264 struct ahci_port_priv *pp = ap->private_data;
265 int is_atapi = ata_is_atapi(qc->tf.protocol);
268 const u32 cmd_fis_len = 5; /* five dwords */
272 * Fill in command table information. First, the header,
273 * a SATA Register - Host to Device command FIS.
275 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
277 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, cmd_tbl);
279 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
280 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
284 if (qc->flags & ATA_QCFLAG_DMAMAP)
285 n_elem = acard_ahci_fill_sg(qc, cmd_tbl);
288 * Fill in command slot information.
290 * ACard note: prd table length not filled in
292 opts = cmd_fis_len | (qc->dev->link->pmp << 12);
293 if (qc->tf.flags & ATA_TFLAG_WRITE)
294 opts |= AHCI_CMD_WRITE;
296 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
298 ahci_fill_cmd_slot(pp, qc->tag, opts);
301 static bool acard_ahci_qc_fill_rtf(struct ata_queued_cmd *qc)
303 struct ahci_port_priv *pp = qc->ap->private_data;
304 u8 *rx_fis = pp->rx_fis;
307 rx_fis += qc->dev->link->pmp * ACARD_AHCI_RX_FIS_SZ;
310 * After a successful execution of an ATA PIO data-in command,
311 * the device doesn't send D2H Reg FIS to update the TF and
312 * the host should take TF and E_Status from the preceding PIO
315 if (qc->tf.protocol == ATA_PROT_PIO && qc->dma_dir == DMA_FROM_DEVICE &&
316 !(qc->flags & ATA_QCFLAG_FAILED)) {
317 ata_tf_from_fis(rx_fis + RX_FIS_PIO_SETUP, &qc->result_tf);
318 qc->result_tf.command = (rx_fis + RX_FIS_PIO_SETUP)[15];
320 ata_tf_from_fis(rx_fis + RX_FIS_D2H_REG, &qc->result_tf);
325 static int acard_ahci_port_start(struct ata_port *ap)
327 struct ahci_host_priv *hpriv = ap->host->private_data;
328 struct device *dev = ap->host->dev;
329 struct ahci_port_priv *pp;
332 size_t dma_sz, rx_fis_sz;
334 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
338 /* check FBS capability */
339 if ((hpriv->cap & HOST_CAP_FBS) && sata_pmp_supported(ap)) {
340 void __iomem *port_mmio = ahci_port_base(ap);
341 u32 cmd = readl(port_mmio + PORT_CMD);
342 if (cmd & PORT_CMD_FBSCP)
343 pp->fbs_supported = true;
344 else if (hpriv->flags & AHCI_HFLAG_YES_FBS) {
345 dev_info(dev, "port %d can do FBS, forcing FBSCP\n",
347 pp->fbs_supported = true;
349 dev_warn(dev, "port %d is not capable of FBS\n",
353 if (pp->fbs_supported) {
354 dma_sz = AHCI_PORT_PRIV_FBS_DMA_SZ;
355 rx_fis_sz = ACARD_AHCI_RX_FIS_SZ * 16;
357 dma_sz = AHCI_PORT_PRIV_DMA_SZ;
358 rx_fis_sz = ACARD_AHCI_RX_FIS_SZ;
361 mem = dmam_alloc_coherent(dev, dma_sz, &mem_dma, GFP_KERNEL);
364 memset(mem, 0, dma_sz);
367 * First item in chunk of DMA memory: 32-slot command table,
368 * 32 bytes each in size
371 pp->cmd_slot_dma = mem_dma;
373 mem += AHCI_CMD_SLOT_SZ;
374 mem_dma += AHCI_CMD_SLOT_SZ;
377 * Second item: Received-FIS area
380 pp->rx_fis_dma = mem_dma;
383 mem_dma += rx_fis_sz;
386 * Third item: data area for storing a single command
387 * and its scatter-gather table
390 pp->cmd_tbl_dma = mem_dma;
393 * Save off initial list of interrupts to be enabled.
394 * This could be changed later
396 pp->intr_mask = DEF_PORT_IRQ;
398 ap->private_data = pp;
400 /* engage engines, captain */
401 return ahci_port_resume(ap);
404 static int acard_ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
406 unsigned int board_id = ent->driver_data;
407 struct ata_port_info pi = acard_ahci_port_info[board_id];
408 const struct ata_port_info *ppi[] = { &pi, NULL };
409 struct device *dev = &pdev->dev;
410 struct ahci_host_priv *hpriv;
411 struct ata_host *host;
416 WARN_ON((int)ATA_MAX_QUEUE > AHCI_MAX_CMDS);
418 ata_print_version_once(&pdev->dev, DRV_VERSION);
420 /* acquire resources */
421 rc = pcim_enable_device(pdev);
425 /* AHCI controllers often implement SFF compatible interface.
426 * Grab all PCI BARs just in case.
428 rc = pcim_iomap_regions_request_all(pdev, 1 << AHCI_PCI_BAR, DRV_NAME);
430 pcim_pin_device(pdev);
434 hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
437 hpriv->flags |= (unsigned long)pi.private_data;
439 if (!(hpriv->flags & AHCI_HFLAG_NO_MSI))
440 pci_enable_msi(pdev);
442 hpriv->mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];
444 /* save initial config */
445 ahci_save_initial_config(&pdev->dev, hpriv, 0, 0);
448 if (hpriv->cap & HOST_CAP_NCQ)
449 pi.flags |= ATA_FLAG_NCQ;
451 if (hpriv->cap & HOST_CAP_PMP)
452 pi.flags |= ATA_FLAG_PMP;
454 ahci_set_em_messages(hpriv, &pi);
456 /* CAP.NP sometimes indicate the index of the last enabled
457 * port, at other times, that of the last possible port, so
458 * determining the maximum port number requires looking at
459 * both CAP.NP and port_map.
461 n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
463 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
466 host->private_data = hpriv;
468 if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss)
469 host->flags |= ATA_HOST_PARALLEL_SCAN;
471 printk(KERN_INFO "ahci: SSS flag set, parallel bus scan disabled\n");
473 for (i = 0; i < host->n_ports; i++) {
474 struct ata_port *ap = host->ports[i];
476 ata_port_pbar_desc(ap, AHCI_PCI_BAR, -1, "abar");
477 ata_port_pbar_desc(ap, AHCI_PCI_BAR,
478 0x100 + ap->port_no * 0x80, "port");
480 /* set initial link pm policy */
482 ap->pm_policy = NOT_AVAILABLE;
484 /* disabled/not-implemented port */
485 if (!(hpriv->port_map & (1 << i)))
486 ap->ops = &ata_dummy_port_ops;
489 /* initialize adapter */
490 rc = acard_ahci_configure_dma_masks(pdev, hpriv->cap & HOST_CAP_64);
494 rc = ahci_reset_controller(host);
498 ahci_init_controller(host);
499 acard_ahci_pci_print_info(host);
501 pci_set_master(pdev);
502 return ata_host_activate(host, pdev->irq, ahci_interrupt, IRQF_SHARED,
506 module_pci_driver(acard_ahci_pci_driver);
508 MODULE_AUTHOR("Jeff Garzik");
509 MODULE_DESCRIPTION("ACard AHCI SATA low-level driver");
510 MODULE_LICENSE("GPL");
511 MODULE_DEVICE_TABLE(pci, acard_ahci_pci_tbl);
512 MODULE_VERSION(DRV_VERSION);